43 CFR Part 3170 — Onshore Oil and Gas Production

PART 3170—ONSHORE OIL AND GAS PRODUCTION Authority: 25 U.S.C. 396d and 2107; 30 U.S.C. 189, 306, 359, and 1751; and 43 U.S.C. 1732(b), 1733, and 1740. Source: 81 FR 81421, Nov. 17, 2016, unless otherwise noted. Subpart 3170—Onshore Oil and Gas Production: General § 3170.1 Authority. The authorities for promulgating the regulations in this part are the Mineral Leasing Act, 30 U.S.C. 181 et seq.; et seq.; et seq.; et seq.; et seq.; et seq. § 3170.2 Scope. The regulations in this part apply to: (a) All Federal onshore and Indian oil and gas leases (other than those of the Osage Tribe); (b) Indian Mineral Development Act (IMDA) agreements for oil and gas, unless specifically excluded in the agreement or unless the relevant provisions of the rule are inconsistent with the agreement; (c) Leases and other business agreements for the development of tribal energy resources under a Tribal Energy Resource Agreement entered into with the Secretary, unless specifically excluded in the lease, other business agreement, or Tribal Energy Resource Agreement; (d) State or private tracts committed to a federally approved unit or communitization agreement (CA) as defined by or established under 43 CFR subpart 3105 or 43 CFR part 3180; and (e) All onshore facility measurement points where oil or gas produced from the leases or agreements identified earlier in this section is measured. § 3170.3 Definitions and acronyms. (a) As used in this part, the term: Allocated or allocation API (followed by a number) Audit trail Authorized officer Averaging period Bias By-pass e.g., Commingling, Communitized area Communitization agreement Condition of Approval (COA) Days Facility (i) A site and associated equipment used to process, treat, store, or measure production from or allocated to a Federal or Indian lease, unit PA, or CA that is located upstream of or at (and including) the approved point of royalty measurement; and (ii) A site and associated equipment used to store, measure, or dispose of produced water that is located on a lease, unit, or communitized area. Facility measurement point (FMP) Gas Incident of Noncompliance (INC) Lease Lessee NIST traceable Notice to lessees and operators (NTL) Off-lease measurement Oil (i) Clean oil or Pipeline oil (ii) Slop oil (iii) Waste oil Operator Participating area (PA) Point of royalty measurement Production Production Measurement Team (PMT) Purchaser Source record e.g., e.g., Statistically significant Tampering Threshold of significance Where: T s U a U b Total observed volume (TOV) Transporter Uncertainty Unit Unit PA Variance (b) As used in this part, the following additional acronyms apply: API BLM Btu CMS LACT OGOR ONRR S&W WIS § 3170.4 Prohibitions against by-pass and tampering. (a) All by-passes are prohibited. (b) Tampering with any measurement device, component of a measurement device, or measurement process is prohibited. (c) Any by-pass or tampering with a measurement device, component of a measurement device, or measurement process may, together with any other remedies provided by law, result in an assessment of civil penalties for knowingly or willfully: (1) Taking, removing, transporting, using, or diverting oil or gas from a lease site without valid legal authority under 30 U.S.C. 1719(d)(2) and 43 CFR 3163.2(f)(2); or (2) Preparing, maintaining, or submitting false, inaccurate, or misleading reports, records, or information under 30 U.S.C. 1719(d)(1) and 43 CFR 3163.2(f)(1). § 3170.5 [Reserved] § 3170.6 Variances. (a) Any party subject to a requirement of a regulation in this part may request a variance from that requirement. (1) A request for a variance must include the following: (i) Identification of the specific requirement from which the variance is requested; (ii) Identification of the length of time for which the variance is requested, if applicable; (iii) An explanation of the need for the variance; (iv) A detailed description of the proposed alternative means of compliance; (v) A showing that the proposed alternative means of compliance will produce a result that meets or exceeds the objectives of the applicable requirement for which the variance is requested; and (vi) The FMP number(s) for which the variance is requested, if applicable. (2) A request for a variance must be submitted as a separate document from any plans or applications. A request for a variance that is submitted as part of a master development plan, application for permit to drill, right-of-way application, or application for approval of other types of operations, rather than submitted separately, will not be considered. Approval of a plan or application that contains a request for a variance does not constitute approval of the variance. A separate request for a variance may be submitted simultaneously with a plan or application. For plans or applications that are contingent upon the approval of the variance request, the BLM encourages the simultaneous submission of the variance request and the plan or application. (3) The party requesting the variance must file the request and any supporting documents using WIS. If electronic filing is not possible or practical, the operator may submit a request for variance on the Form 3160-5, Sundry Notices and Reports on Wells (Sundry Notice) to the BLM Field Office having jurisdiction over the lands described in the application. (4) The AO, after considering all relevant factors, may approve the variance, or approve it with COAs, only if the AO determines that: (i) The proposed alternative means of compliance meets or exceeds the objectives of the applicable requirement(s) of the regulation; (ii) Approving the variance will not adversely affect royalty income and production accountability; and (iii) Issuing the variance is consistent with maximum ultimate economic recovery, as defined in 43 CFR 3160.0-5. (5) The decision whether to grant or deny the variance request is entirely within the BLM's discretion. (6) A variance from the requirements of a regulation in this part does not constitute a variance from provisions of other regulations, including Onshore Oil and Gas Orders. (b) The BLM reserves the right to rescind a variance or modify any COA of a variance due to changes in Federal law, technology, regulation, BLM policy, field operations, noncompliance, or other reasons. The BLM will provide a written justification if it rescinds a variance or modifies a COA. § 3170.7 Required recordkeeping, records retention, and records submission. (a) Lessees, operators, purchasers, transporters, and any other person directly involved in producing, transporting, purchasing, selling, or measuring oil or gas through the point of royalty measurement or the point of first sale, whichever is later, must retain all records, including source records, that are relevant to determining the quality, quantity, disposition, and verification of production attributable to Federal or Indian leases for the periods prescribed in paragraphs (c) through (e) of this section. (b) This retention requirement applies to records generated during or for the period for which the lessee or operator has an interest in or conducted operations on the lease, or in which a person is involved in transporting, purchasing, or selling production from the lease. (c) For Federal leases, and units or CAs that include Federal leases, but do not include Indian leases, the record holder must maintain records for: (1) Seven years after the records are generated; unless, (2) A judicial proceeding or demand involving such records is timely commenced, in which case the record holder must maintain such records until the final nonappealable decision in such judicial proceeding is made, or with respect to that demand is rendered, unless the Secretary or his/her designee or the applicable delegated State authorizes in writing an earlier release of the requirement to maintain such records. (d) For Indian leases, and units or CAs that include Indian leases, but do not include Federal leases, the record holder must maintain records for: (1) Six years after the records are generated; unless, (2) The Secretary or his/her designee notifies the record holder that the Department of the Interior has initiated or is participating in an audit or investigation involving such records, in which case the record holder must maintain such records until the Secretary or his/her designee releases the record holder from the obligation to maintain the records. (e) For units and communitized areas that include both Federal and Indian leases, 6 years after the records are generated. If the Secretary or his/her designee has notified the record holder within those 6 years that an audit or investigation involving such records has been initiated, then: (1) If a judicial proceeding or demand is commenced within 7 years after the records are generated, the record holder must retain all records regarding production from the lease, unit PA, or CA until the final nonappealable decision in such judicial proceeding is made, or with respect to that demand is rendered, unless the Secretary or his/her designee authorizes in writing a release of the requirement to maintain such records before a final nonappealable decision is made or rendered. (2) If a judicial proceeding or demand is not commenced within 7 years after the records are generated, the record holder must retain all records regarding production from the unit or communitized area until the Secretary or his/her designee releases the record holder from the obligation to maintain the records; (f) The lessee, operator, purchaser, or transporter must maintain an audit trail. (g) All records, including source records, that are used to determine quality, quantity, disposition, and verification of production attributable to a Federal or Indian lease, unit PA, or CA, must include the FMP number or the lease, unit PA, or CA number, along with a unique equipment identifier ( e.g., (1) The name of the operator; (2) The lease, unit PA, or CA number; and (3) The well or facility name and number. (h) Upon request of the AO, the operator, purchaser, or transporter must provide such records to the AO as may be required by regulation, written order, Onshore Order, NTL, or COA. (i) All records must be legible. (j) All records requiring a signature must also have the signer's printed name. § 3170.8 Appeal procedures. (a) BLM decisions, orders, assessments, or other actions under the regulations in this part are administratively appealable under the procedures prescribed in 43 CFR 3165.3(b), 3165.4, and part 4. (b) For any recommendation made by the PMT, and approved by the BLM, a party affected by such recommendation may file a request for discretionary review by the Assistant Secretary for Land and Minerals Management. The Assistant Secretary may delegate this review function as he or she deems appropriate, in which case the affected party's application for discretionary review must be made to the person or persons to whom the Assistant Secretary's review function has been delegated. § 3170.9 Enforcement. Noncompliance with any of the requirements of this part or any order issued under this part may result in enforcement actions under 43 CFR subpart 3163 or any other remedy available under applicable law or regulation. Subpart 3171—Approval of Operations Source: 88 FR 39516, June 16, 2023, unless otherwise noted. § 3171.1 Authority. (a) The Secretaries of the Interior and Agriculture have authority under various Federal and Indian mineral leasing laws, as defined in 30 U.S.C. 1702, to manage oil and gas operations. The Secretary of the Interior has delegated this authority to the Bureau of Land Management (BLM), which has issued onshore oil and gas operating regulations codified at 43 CFR part 3160. For leases on Indian lands, the delegation to the BLM appears at 25 CFR parts 211, 212, 213, 225, and 227. (b) The Secretary of Agriculture has authority under the Federal Onshore Oil and Gas Leasing Reform Act of 1987 (Pub. L. 100-203) (Reform Act) to regulate surface disturbing activities conducted pursuant to a Federal oil and gas lease on National Forest Service (NFS) lands. This authority has been delegated to the Forest Service (FS). Its regulatory authority is at 36 CFR chapter II, including, but not limited to, part 228, subpart E, part 251, subpart B, and part 261. The FS is responsible only for approving and regulating surface disturbing activities on NFS lands and appeals related to FS decisions or approvals. § 3171.2 Purpose. The purpose of this subpart is to state the application requirements for the approval of all proposed oil and gas and service wells, certain subsequent well operations, and abandonment. § 3171.3 Scope. This subpart applies to all onshore leases of Federal and Indian oil and gas (other than those of the Osage Tribe). It also applies to Indian Mineral Development Act agreements. For proposed operations on a committed State or fee tract in a federally supervised unit or communitized tract, the operator must furnish a copy of the approved State permit to the authorized officer of the BLM which will be accepted for record purposes. § 3171.4 Definitions. As used in this subpart, the following definitions apply: Best Management Practices (BMP) Blooie line Casual use Complete APD (1) The APD package must contain: (i) A completed Form 3160-3 (Application for Permit to Drill or Reenter) (see 43 CFR 3162.3-1(d)); (ii) A well plat certified by a registered surveyor with a surveyor's original stamp (see § 3171.6(b)); (iii) A drilling plan (see 43 CFR 3162.3-1(d) and 3171.7); (iv) A Surface Use Plan of Operations (see 43 CFR 3162.3-1(d) and 3171.8); (v) Evidence of bond coverage (see 43 CFR 3162.3-1(d) and 3171.9); (vi) Operator certification with original signature (see § 3171.10); and (vii) Other information that may be required by order or notice (see 43 CFR 3162.3-1(d)(4)). (2) The BLM and the surface managing agency, as appropriate, will review the APD package and determine that the drilling plan, the Surface Use Plan of Operations, and other information that the BLM may require (43 CFR 3162.3-1(d)(4)), including the well location plat and geospatial databases, completely describe the proposed action. Condition of Approval (COA) Days Emergency repairs Geospatial database Indian lands Indian oil and gas Master Development Plan National Forest System lands Onsite inspection Private surface owner Reclamation Split estate Surface managing agency Variance § 3171.5 Application for Permit to Drill (APD). An Application for Permit to Drill or Reenter, on Form 3160-3, is required for each proposed well, and for reentry of existing wells (including disposal and service wells), to develop an onshore lease for Federal or Indian oil and gas. (a) Where to file. (b) Early notification. (c) Notice of Staking option. (2) For Federal lands managed by other surface managing agencies, the BLM will provide a copy of the Notice of Staking to the appropriate surface managing agency office. In Alaska, when a subsistence stipulation is part of the lease, the operator must also send a copy of the Notice of Staking to the appropriate Borough and/or Native Regional or Village Corporation. (3) Within 10 days of receiving the Notice of Staking, the BLM or the FS will review it for required information and schedule a date for the onsite inspection. The onsite inspection will be conducted as soon as weather and other conditions permit. The operator must stake the proposed drill pad and ancillary facilities, and flag new or reconstructed access routes, before the onsite inspection. The staking must include a center stake for the proposed well, two reference stakes, and a flagged access road centerline. Staking activities are considered casual use unless the particular activity is likely to cause more than negligible disturbance or damage. Offroad vehicular use for the purposes of staking is casual use unless, in a particular case, it is likely to cause more than negligible disturbance or damage, or otherwise prohibited. (4) On non-NFS lands, the BLM will invite the surface managing agency and private surface owner, if applicable, to participate in the onsite inspection. If the surface is privately owned, the operator must furnish to the BLM the name, address, and telephone number of the surface owner if known. All parties who attend the onsite inspection will jointly develop a list of resource concerns that the operator must address in the APD. The operator will be provided a list of these concerns either during the onsite inspection or within 7 days of the onsite inspection. Surface owner concerns will be considered to the extent practical within the law. Failure to submit an APD within 60 days of the onsite inspection will result in the Notice of Staking being returned to the operator. § 3171.6 Components of a complete APD package. Operators are encouraged to consider and incorporate Best Management Practices into their APDs because Best Management Practices can result in reduced processing times and reduced number of Conditions of Approval. An APD package must include the following information that will be reviewed by technical specialists of the appropriate agencies to determine the technical adequacy of the package: (a) A completed Form 3160-3; and (b) A well plat. Operators must include in the APD package a well plat and geospatial database prepared by a registered surveyor depicting the proposed location of the well and identifying the points of control and datum used to establish the section lines or metes and bounds. The purpose of this plat is to ensure that operations are within the boundaries of the lease or agreement and that the depiction of these operations is accurately recorded both as to location (latitude and longitude) and in relation to the surrounding lease or agreement boundaries (public land survey corner and boundary ties). The registered surveyor should coordinate with the cadastral survey division of the appropriate BLM state office, particularly where the lands have not been surveyed under the Public Land Survey System. (1) The plat and geospatial database must describe the location of operations in: (i) Geographical coordinates generated by an electronic navigation system, and document the datum referenced to generate these coordinates; and (ii) In feet and direction from the nearest two adjacent section lines, or, if not within the Rectangular Survey System, the nearest two adjacent property lines, generated from the BLM's current Geographic Coordinate Data Base. (2) The surveyor who prepared the plat must sign it, certifying that the location has been staked on the ground as shown on the plat. (3) Surveying and staking are necessary casual uses, typically involving negligible surface disturbance. The operator is responsible for making access arrangements with the appropriate Surface Managing Agency (other than the BLM and the FS) or private surface owner. On tribal or allotted lands, the operator must contact the appropriate office of the BIA to make access arrangements with the Indian surface owners. In the event that not all of the Indian owners consent or may be located, but a majority of those who can be located consent, or the owners of interests are so numerous that it would be impracticable to obtain their consent and the BIA finds that the issuance of the APD will cause no substantive injury to the land or any owner thereof, the BIA may approve access. Typical off-road vehicular use, when conducted in conjunction with these activities, is a necessary action for obtaining a permit and may be done without advance approval from the Surface Managing Agency, except for: (i) Lands administered by the Department of Defense; (ii) Other lands used for military purposes; (iii) Indian lands; or (iv) Where more than negligible surface disturbance is likely to occur or is otherwise prohibited. (4) No entry on split estate lands for surveying and staking should occur without the operator first making a good faith effort to notify the surface owner. Also, operators are encouraged to notify the BLM or the FS, as appropriate, before entering private lands to stake for Federal mineral estate locations. [89 FR 30997, Apr. 23, 2024] § 3171.7 Drilling plan. With each copy of Form 3160-3, the operator must submit to the BLM either a drilling plan or reference a previously submitted field-wide drilling plan (a drilling plan that can be used for all the wells in a field, any differences for specific wells will be described in the APD specific to that well). The drilling plans must be in sufficient detail to permit a complete appraisal of the technical adequacy of, and environmental effects associated with, the proposed project. The drilling plan must adhere to the provisions and standards of subpart 3172 of this part and, if applicable, subpart 3176 of this part and must include the following information: (a) Names and estimated tops of all geologic groups, formations, members, or zones. (b) Estimated depth and thickness of formations, members, or zones potentially containing usable water, oil, gas, or prospectively valuable deposits of other minerals that the operator expects to encounter, and the operator's plans for protecting such resources. (c) The operator's minimum specifications for blowout prevention equipment and diverter systems to be used, including size, pressure rating, configuration, and the testing procedure and frequency. Blowout prevention equipment must meet the minimum standards outlined in subpart 3172 of this part. (d) The operator's proposed casing program, including size, grade, weight, type of thread and coupling, the setting depth of each string, and its condition. The operator must include the minimum design criteria, including casing loading assumptions and corresponding safety factors for burst, collapse, and tensions (body yield and joint strength). The operator must also include the lengths and setting depth of each casing when a tapered casing string is proposed. The hole size for each well bore section of hole drilled must be included. Special casing designs such as the use of coiled tubing or expandable casing may necessitate additional information. (e) The estimated amount and type(s) of cement expected to be used in the setting of each casing string. If stage cementing will be used, provide the setting depth of the stage tool(s) and amount and type of cement, including additives, to be used for each stage. Provide the yield of each cement slurry and the expected top of cement, with excess, for each cemented string or stage. (f) Type and characteristics of the proposed circulating medium or mediums proposed for the drilling of each well bore section, the quantities and types of mud and weighting material to be maintained, and the monitoring equipment to be used on the circulating system. The operator must submit the following information when air or gas drilling is proposed: (1) Length, size, and location of the blooie line, including the gas ignition and dust suppression systems; (2) Location and capacity of the compressor equipment, including safety devices, describe the distance from the well bore, and location within the drill site; and (3) Anticipated amounts, types, and other characteristics as defined in this section, of the stand by mud or kill fluid and associated circulating equipment. (g) The testing, logging, and coring procedures proposed, including drill stem testing procedures, equipment, and safety measures. (h) The expected bottom-hole pressure and any anticipated abnormal pressures, temperatures, or potential hazards that the operator expects to encounter, such as lost circulation and hydrogen sulfide (see subpart 3176 of this part). A description of the operator's plans for mitigating such hazards must be included. (i) Any other facets of the proposed operation that the operator would like the BLM to consider in reviewing the application. Examples include, but are not limited to: (1) For directional wells, proposed directional design, plan view, and vertical section in true vertical and measured depths; (2) Horizontal drilling; and (3) Coil tubing operations. § 3171.8 Surface Use Plan of Operations. (a) The Surface Use Plan of Operations must: (1) Describe the access road(s) and drill pad, the construction methods that the operator plans to use, and the proposed means for containment and disposal of all waste materials; (2) Provide for safe operations, adequate protection of surface resources, groundwater, and other environmental components; (3) Include adequate measures for stabilization and reclamation of disturbed lands: (4) Describe any Best Management Practices the operator plans to use; and (5) Where the surface is privately owned, include a certification of Surface Access Agreement or an adequate bond, as described in § 3171.19. (b) All maps that are included in the Surface Use Plan of Operations must be of a scale no smaller than 1:24,000, unless otherwise stated in paragraph (e) of this section. Geospatial vector and raster data must include appropriate attributes and metadata. Georeferenced raster images must be from the same source as hardcopy plats and maps submitted in the APD package. All proposed on-lease surface disturbance must be surveyed and staked as described in paragraphs (e)(1) through (12) of this section, including: (1) The well location; (2) Two 200-foot (61-meter) directional reference stakes; (3) The exterior pad dimensions; (4) The reserve pit; (5) Cuts and fills; (6) Outer limits of the area to be disturbed (catch points); and (7) Any off-location facilities. (c) Proposed new roads require centerline flagging with stakes clearly visible from one to the next. In rugged terrain, cut and fill staking and/or slope staking of proposed new access roads and locations for ancillary facilities that may be necessary, as determined by the BLM or the FS. (d) The onsite inspection will not occur until the required surveying and staking is complete, and any new access road(s) have been flagged, unless a variance is first granted under § 3171.23. (e) Information required by the Surface Use Plan of Operations may be shown on the same map if it is appropriately labeled or on separate diagrams or maps and must include the following: (1) Existing roads. (i) The operator must improve or maintain existing roads in a condition the same as or better than before operations began. The operator must provide any plans for improvement and/or maintenance of existing roads. The information provided by the operator for construction and use of roads will be used by the BLM for any Right-of-Way application, as described in § 3171.18. The operator may use existing terrain and two-track trails, where appropriate, to assure environmental protection. The operator should consider using Best Management Practices in improving or maintaining existing roads. (ii) The operator may use existing roads under the jurisdiction of the FS for access if they meet the transportation objectives of the FS. When access involves the use of existing roads, the FS may require that the operator contribute to road maintenance. This is usually authorized by a Road Use Permit or a joint road use agreement. The FS will charge the operator a pro rata share of the costs of road maintenance and improvement, based upon the anticipated use of the road. (2) New or reconstructed access roads. (i) Road width; (ii) Maximum grade; (iii) Crown design; (iv) Turnouts; (v) Drainage and ditch design; (vi) On-site and off-site erosion control; (vii) Revegetation of disturbed areas; (viii) Location and size of culverts and/or bridges; (ix) Fence cuts and/or cattleguards; (x) Major cuts and fills; (xi) Source and storage of topsoil; and (xii) Type of surfacing materials, if any, that will be used. (3) Location of existing wells. (4) Location of existing and/or proposed production facilities. (i) The map or diagram and optional geospatial database must show and differentiate between proposed and existing flow lines, overhead and buried power lines, and water lines. If facilities will be located on the well pad, the information should be consistent with the layout provided in paragraph (e)(9) of this section. (ii) The operator must show the dimensions of the facility layouts for all new construction. This information may be used by the BLM or the FS for Right- of-Way or Special Use Authorization application information, as specified in § 3171.18. (iii) If the operator has not developed information regarding production facilities, it may defer submission of that information until a production well is completed, in which case the operator will follow the procedures in § 3171.21. However, for purposes of the National Environmental Policy Act (NEPA) analysis, the BLM or the FS will need a reasonable estimate of the facilities to be employed. (5) Location and types of water supply. (6) Construction materials. (7) Methods for handling waste. e.g., (8) Ancillary facilities. (9) Well site layout. (i) The operator must submit a plat of a scale of not less than 1 inch = 50 feet showing the location and orientation of: (A) The proposed drill pad; (B) Reserve pit/blooie line/flare pit location; (C) Access road entry points and their approximate location with respect to topographic features and with cross section diagrams of the drill pad; and (D) The reserve pit showing all cuts; and fills and the relation to topography. (ii) The plat must also include the approximate proposed location and orientation of the: (A) Drilling rig; (B) Dikes and ditches to be constructed; and (C) Topsoil and/or spoil material stockpiles. (10) Plans for surface reclamation. (i) Such plans must include, as appropriate: (A) Configuration of the reshaped topography; (B) Drainage systems; (C) Segregation of spoil materials (stockpiles); (D) Surface disturbances; (E) Backfill requirements; (F) Proposals for pit/sump closures; (G) Redistribution of topsoil; (H) Soil treatments; (I) Seeding or other steps to reestablish vegetation; (J) Weed control; and (K) Practices necessary to reclaim all disturbed areas, including any access roads and pipelines. (ii) The operator may amend this reclamation plan at the time of abandonment. Further details for reclamation are contained in § 3171.25. (11) Surface ownership. (12) Other information. § 3171.9 Bonding. (a) Most bonding needs for oil and gas operations on Federal leases are discussed in 43 CFR part 3100, subpart 3104. The operator must obtain a bond in its own name as principal, or a bond in the name of the lessee or sublessee. If the operator uses the lessee or sublessee's bond, the operator must furnish a rider (consent of surety and principal) that includes the operator under the coverage of the bond. The operator must specify on the APD, Form 3160-3, the type of bond and bond number under which the operations will be conducted. (1) For Indian oil and gas, the appropriate provisions at 25 CFR chapter I, subchapter I, govern bonding. (2) Under the regulations at 43 CFR 3104.5 and 36 CFR 228.109, the BLM or the FS may require additional bond coverage for specific APDs. Other factors that the BLM or the FS may consider include: (i) History of previous violations; (ii) Location and depth of wells; (iii) The total number of wells involved; (iv) The age and production capability of the field; and (v) Unique environmental issues. (3) These bonds may be in addition to any statewide, nationwide, or separate lease bond already applicable to the lease. In determining the bond amount, the BLM may consider impacts of activities on both Federal and non-Federal lands required to develop the lease that impact lands, waters, and other resources off the lease. (4) Separate bonds may be required for associated Rights-of-Way and/or Special Use Authorizations that authorize activities not covered by the approved APD. (b) On Federal leases, operators may request a phased release of an individual lease bond. The BLM will grant this reduction after reclamation of some portion of the lease only if the operator: (1) Has satisfied the terms and conditions in the plan for surface reclamation for that particular operation; and (2) No longer has any down-hole liability. (c) If appropriate, the BLM may reduce the bond in the amount requested by the operator or appropriate surface managing agency. The FS also may reduce bonds it requires (but not the BLM-required bonds). The BLM and the FS will base the amount of the bond reduction on a calculation of the sum that is sufficient to cover the remaining operations (including royalty payments) and abandonment (including reclamation) as authorized by the Surface Use Plan of Operations. § 3171.10 Operator certification. (a) The operator must include its name, address, and telephone number, and the same information for its field representative, in the APD package. (b) The following certification must carry the operator's original signature or be submitted to the BLM using the BLM's electronic reporting system: I hereby certify that I, or someone under my direct supervision, have inspected the drill site and access route proposed herein; that I am familiar with the conditions which currently exist; that I have full knowledge of state and Federal laws applicable to this operation; that the statements made in this APD package are, to the best of my knowledge, true and correct; and that the work associated with the operations proposed herein will be performed in conformity with this APD package and the terms and conditions under which it is approved. I also certify that I, or the company I represent, am responsible for the operations conducted under this application. These statements are subject to the provisions of 18 U.S.C. 1001 for the filing of false statements. Executed this _ day of _____, 20____. Name Position Title Address Telephone Field representative (if not above signatory) Address (if different from above) Telephone (if different from above) Email (optional) (c) Agents not directly employed by the operator must submit a letter from the operator authorizing that agent to act or file this application on their behalf. § 3171.11 Onsite inspection. The onsite inspection must be conducted before the APD will be considered complete. § 3171.12 APD posting and processing. (a) Posting. (1) The BLM will post information about the APD or Notice of Staking for Federal oil and gas leases to the internet and in an area of the BLM Field Office having jurisdiction that is readily accessible to the public. Posting to the internet under this provision will not be required until after March 13, 2017. If the surface is managed by a Federal agency other than the BLM, that agency also is required to post the notice for at least 30 days. This would include the BIA where the surface is held in trust but the mineral estate is federally owned. The posting is for informational purposes only and is not an appealable decision. The purpose of the posting is to give any interested party notification that a Federal approval of mineral operations has been requested. The BLM or the FS will not post confidential information. (2) Reposting of the proposal may be necessary if the posted location of the proposed well is: (i) Moved to a different quarter-quarter section; (ii) Moved more than 660 feet for lands that are not covered by a Public Land Survey; or (iii) If the BLM or the FS determine that the move is substantial. (b) Processing. (1) Within 10 days of receiving an application, the BLM (in consultation with the FS if the application concerns NFS lands) will notify the operator as to whether or not the application is complete. The BLM will request additional information and correction of any material submitted, if necessary, in the 10-day notification. If an onsite inspection has not been performed, the applicant will be notified that the application is not complete. Within 10 days of receiving the application, the BLM, in coordination with the operator and surface managing agency, including the private surface owner in the case of split estate minerals, will schedule a date for the onsite inspection (unless the onsite inspection has already been conducted as part of a Notice of Staking). The onsite inspection will be held as soon as practicable based on participants' schedules and weather conditions. The operator will be notified at the onsite inspection of any additional deficiencies that are discovered during the inspection. The operator has 45 days after receiving notice from the BLM to provide any additional information necessary to complete the APD, or the APD may be returned to the operator. (2) Within 30 days after the operator has submitted a complete application, including incorporating any changes that resulted from the onsite inspection, the BLM will: (i) Approve the application, subject to reasonable Conditions of Approval, if the appropriate requirements of the NEPA, National Historic Preservation Act, Endangered Species Act, and other applicable law have been met and, if on NFS lands, the FS has approved the Surface Use Plan of Operations; (ii) Notify the operator that it is deferring action on the permit; or (iii) Deny the permit if it cannot be approved and the BLM cannot identify any actions that the operator could take that would enable the BLM to issue the permit or the FS to approve the Surface Use Plan of Operations, if applicable. (3) The notice of deferral in paragraph (b)(2)(ii) of this section must specify: (i) Any action the operator could take that would enable the BLM (in consultation with the FS if applicable) to issue a final decision on the application. The FS will notify the applicant of any action the applicant could take that would enable the FS to issue a final decision on the Surface Use Plan of Operations on NFS lands. Actions may include, but are not limited to, assistance with: (A) Data gathering; and (B) Preparing analyses and documents. (ii) If applicable, a list of actions that the BLM or the FS need to take before making a final decision on the application, including appropriate analysis under NEPA or other applicable law and a schedule for completing these actions. (4) The operator has 2 years from the date of the notice under paragraph (b)(3)(i) of this section to take the action specified in the notice. If the appropriate analyses required by NEPA, National Historic Preservation Act, Endangered Species Act, and other applicable laws have been completed, the BLM (and the FS if applicable), will make a decision on the permit and the Surface Use Plan of Operations within 10 days of receiving a report from the operator addressing all of the issues or actions specified in the notice under paragraph (b)(3)(i) of this section and certifying that all required actions have been taken. If the operator has not completed the actions specified in the notice within 2 years from the operator's receipt of the notice under paragraph (b)(3)(i), the BLM will deny the permit. (5) For APDs on NFS lands, the decision to approve a Surface Use Plan of Operations or Master Development Plan may be subject to FS appeal procedures. The BLM cannot approve an APD until the appeal of the Surface Use Plan of Operations is resolved. § 3171.13 Approval of APDs. (a) The BLM has the lead responsibility for completing the environmental review process, except in the case of NFS lands. (1) The BLM cannot approve an APD or Master Development Plan until the requirements of certain other laws and regulations including NEPA, the National Historic Preservation Act, and the Endangered Species Act have been met. The BLM must document that the needed reviews have been adequately conducted. In some cases, operators conduct these reviews, but the BLM remains responsible for their scope and content and makes its own evaluation of the environmental issues, as required by 40 CFR 1506.5(b). (2) The approved APD will contain Conditions of Approval that reflect necessary mitigation measures. In accordance with 43 CFR 3101.1-2 and 36 CFR 228.107, the BLM or the FS may require reasonable mitigation measures to ensure that the proposed operations minimize adverse impacts to other resources, uses, and users, consistent with granted lease rights. The BLM will incorporate any mitigation requirements, including Best Management Practices, identified through the APD review and appropriate NEPA and related analyses, as Conditions of Approval to the APD. (3) The BLM will establish the terms and Conditions of Approval for any associated Right-of-Way when the application is approved. (b) For NFS lands, the FS will establish the terms and Conditions of Approval for both the Surface Use Plan of Operations and any associated Surface Use Authorization. On NFS lands the FS has principal responsibility for compliance with NEPA, the National Historic Preservation Act, and the Endangered Species Act, but the BLM should be a cooperating or co-lead agency for this purpose and adopt the analysis as the basis for its decision. After the FS notifies the BLM it has approved a Surface Use Plan of Operations on NFS lands, the BLM must approve the APD before the operator may begin any surface-disturbing activity. (c) On Indian lands, BIA has responsibility for approving Rights-of-Way. (d) In the case of Indian lands, the BLM may be a cooperating or co-lead agency for NEPA compliance or may adopt the NEPA analysis prepared by the BIA (516 Department of the Interior Manual (DM) 3). § 3171.14 Valid Period of Approved APD. (a) For APDs approved on or after July 4, 2025, an APD approval is valid for a single 4-year period from the date that it is approved, or until lease expiration, whichever occurs first. (b) Notwithstanding paragraph (a) of this section, if an APD approval expires by reason other than lease expiration, the APD approval shall remain valid if the operator or lessee: (1) Has drilled the well to the approximate total measured depth in the approved APD, including wells drilled to the approximate total measured depth and not yet completed; (2) Is drilling the well with a rig capable of drilling the well to the proposed total measured depth in the approved APD; or (3) Has set the surface casing for the well and has submitted a plan, approved by the BLM prior to expiration of the APD approval, for continuously drilling the well to reach the proposed total measured depth in the approved APD. The plan must include the timeframe for continuously drilling and completing the well and any extenuating circumstances that may delay the continuous drilling and completion of the well. (c) If, upon expiration of the approved APD, the operator created surface disturbance or began drilling the well under the approved APD, the operator or lessee must either comply with all applicable plugging, abandonment, and reclamation requirements or submit a new APD covering the existing disturbance. (d) The operator is responsible for reclaiming any surface disturbance that resulted from its actions, even if a well was not drilled. Earthwork for reclamation must be completed within 6 months of APD expiration (weather permitting). (e) The valid period for an approved APD on a lease suspended under subpart 3103 will be adjusted to account for the suspension. Beginning on the date the suspension is lifted, the valid period of the approved APD will be extended by the time that was remaining on the term of the approved APD on the effective date of the suspension. [89 FR 30997, Apr. 23, 2024, as amended at 90 FR 36122, Aug. 1, 2025] § 3171.15 Master Development Plans. (a) An operator may elect to submit a Master Development Plan addressing two or more APDs that share a common drilling plan, Surface Use Plan of Operations, and plans for future development and production. Submitting a Master Development Plan facilitates early planning, orderly development, and the cumulative effects analysis for all the APDs expected to be drilled by an operator in a developing field. Approval of a Master Development Plan serves as approval of all of the APDs submitted with the Plan. Processing of a Master Development Plan follows the procedures in § 3171.12(b). (b) After the Master Development Plan is approved, subsequent APDs can reference the Master Development Plan and be approved using the NEPA analysis for the Master Development Plan, absent substantial deviation from the Master Development Plan previously analyzed or significant new information relevant to environmental effects. Therefore, an approved Master Development Plan results in timelier processing of subsequent APDs. Each subsequent proposed well must have a survey plat and an APD (Form 3160-3) that references the Master Development Plan and any specific variations for that well. § 3171.16 Waiver from electronic submission requirements. The operator may request a waiver from the electronic submission requirement for an APD or Notice of Staking if compliance would cause hardship or the operator is unable to file these documents electronically. In the request, the operator must explain the reason(s) that prevent its use of the electronic system, plans for complying with the electronic submission requirement, and a timeframe for compliance. If the request applies to a particular set of APDs or Notices of Staking, then the request must identify the APDs or Notices of Staking to which the waiver applies. The waiver request is subject to BLM approval. If the request does not specify a particular set of APDs or Notices of Staking, then the waiver will apply to all submissions made by the operator during the compliance timeframe included as part of the BLM's waiver approval. The BLM will not consider an APD or Notice of Staking that the operator did not submit through the electronic system, unless the BLM approves a waiver. § 3171.17 General operating requirements—operator responsibilities. (a) In the APD package, the operator must describe or show, as set forth in this subpart, the procedures, equipment, and materials to be used in the proposed operations. The operator must conduct operations to minimize adverse effects to surface and subsurface resources, prevent unnecessary surface disturbance, and conform with currently available technology and practice. While appropriate compliance with certain statutes, such as NEPA, the National Historic Preservation Act, and the Endangered Species Act, are Federal responsibilities, the operator may choose to conduct inventories and provide documentation to assist the BLM or the surface managing agency to meet the requirements of this paragraph (a). The inventories and other work may require entering the lease and adjacent lands before approval of the APD. As in staking and surveying, the operator should make a good faith effort to contact the surface managing agency or surface owner before entry upon the lands for these purposes. (b) The operator cannot commence either drilling operations or preliminary construction activities before the BLM's approval of the APD. A copy of the approved APD and any Conditions of Approval must be available for review at the drill site. Operators are responsible for their contractor and subcontractor's compliance with the requirements of the approved APD and/or Surface Use Plan of Operations. Drilling without approval or causing surface disturbance without approval is a violation of 43 CFR 3162.3-1(c) and is subject to a monetary assessment under 43 CFR 3163.1(b)(2). (c) The operator must comply with the provisions of the approved APD and applicable laws, regulations, and Notices to Lessees, including, but not limited to, those that address the issues described in paragraphs (c)(1) through (5) of this section. (1) Cultural and historic resources. (i) If the operator decides to relocate operations to avoid further costs to mitigate the site, the operator remains responsible for recording the location of any historic or archaeological resource that are discovered as a result of the operator's actions. The operator also is responsible for stabilizing the exposed cultural material if the operator created an unstable condition that must be addressed immediately. The BLM, the FS, or other appropriate surface managing agency will assume responsibility for evaluation and determination of significance related to the historic or archaeological site. (ii) If the operator does not relocate operations, the operator is responsible for mitigation and stabilization costs and the BLM, the FS, or appropriate surface managing agency will provide technical and procedural guidelines for conducting mitigation. The operator may resume construction operations when the BLM or the FS verifies that the operator has completed the required mitigation. (iii) Relocation of activities may subject the proposal to additional environmental review. Therefore, if the presence of such sites is suspected, the operator may want to submit alternate locations for advance approval before starting construction. (2) Endangered Species Act. et seq. (3) Surface protection. (i) Avoiding steep slopes and excessive land clearing when siting structures, facilities, and other improvements; and (ii) Temporarily suspending operations when frozen ground, thawing, or other weather-related conditions would cause otherwise avoidable or excessive impacts. (4) Safety measures. (i) In the event of an emergency, the operator may take immediate action without prior surface managing agency approval to safeguard life or to prevent significant environmental degradation. The BLM or the FS must receive notification of the emergency situation and the remedial action taken by the operator as soon as possible, but not later than 24 hours after the emergency occurred. If the emergency only affected drilling operations and had no surface impacts, only the BLM must be notified. (ii) If the emergency involved surface resources on other surface managing agency lands, the operator should also notify the surface managing agency and private surface owner within 24 hours. (iii) Upon conclusion of the emergency, the BLM or the FS, where appropriate, will review the incident and take appropriate action. (5) Completion reports. § 3171.18 Rights-of-Way and Special Use Authorizations. (a) The BLM or the FS will notify the operator of any additional Rights-of-Way, Special Use Authorizations, licenses, or other permits that are needed for roads and support facilities for drilling or off-lease access, as appropriate. This notification will normally occur at the time the operator submits the APD or Notice of Staking package, or Sundry Notice, or during the onsite inspection. (b) The BLM or the FS, as appropriate, will approve or accept on-lease activities that are associated with actions proposed in the APD or Sundry Notice and that will occur on the lease as part of the APD or Sundry Notice. These actions do not require a Right-of- Way or Special Use Authorization. For pipeline Rights-of-Way crossing lands under the jurisdiction of two or more Federal surface managing agencies, except lands in the National Park Service or Indian lands, applications should be submitted to the BLM. Refer to 43 CFR parts 2800 and 2880 for guidance on BLM Rights-of-Way and 36 CFR part 251 for guidance on FS Special Use Authorizations. (1) Rights-of-Way (BLM). (ii) Any additional information specified in 43 CFR parts 2800 and 2880 will be required in order to process the Right- of-Way. The BLM will notify the operator within 10 days of receipt of a Notice of Staking, APD, or other notification if any parts of the project require a Right- of-Way. If a Right-of-Way is needed, the information required from the operator to approve the Right-of-Way may be submitted by the operator with the APD package if the Notice of Staking option has been used. (2) Special Use Authorizations (FS) (36 CFR part 251, subpart B). § 3171.19 Operating on lands with non-Federal surface and Federal oil and gas. (a) The operator must submit the name, address, and phone number of the surface owner, if known, in its APD. The BLM will invite the surface owner to the onsite inspection to assure that their concerns are considered. As provided in the oil and gas lease, the BLM may request that the applicant conduct surveys or otherwise provide information needed for the BLM's National Historic Preservation Act consultation with the State Historic Preservation Officer or Indian tribe or its Endangered Species Act consultation with the relevant fisheries agency. The Federal mineral lessee has the right to enter the property for the purpose set out in the preceding sentence, since it is a necessary prerequisite to development of the dominant mineral estate. Nevertheless, the lessee or operator should seek to reach agreement with the surface owner about the time and method by which any survey would be conducted. (b) Likewise, in the case of actual oil and gas operations, the operator must make a good faith effort to notify the private surface owner before entry and make a good faith effort to obtain a Surface Access Agreement from the surface owner. This section also applies to lands with Indian trust surface and Federal minerals. In these cases, the operator must make a good faith effort to obtain surface access agreement with the tribe in the case of tribally owned surface, otherwise with the majority of the Indian surface owners who can be located with the assistance and concurrence of the BIA. The Surface Access Agreement may include terms or conditions of use, be a waiver, or an agreement for compensation. The operator must certify to the BLM that: (1) It made a good faith effort to notify the surface owner before entry; and (2) That an agreement with the surface owner has been reached or that a good faith effort to reach an agreement failed. If no agreement was reached with the surface owner, the operator must submit an adequate bond (minimum of $1,000) to the BLM for the benefit of the surface owner sufficient to: (i) Pay for loss or damages; or (ii) As otherwise required by the specific statutory authority under which the surface was patented and the terms of the lease. (c) Surface owners have the right to appeal the sufficiency of the bond. Before the approval of the APD, the BLM will make a good faith effort to contact the surface owner to assure that they understand their rights to appeal. (d) The BLM must comply with NEPA, the National Historic Preservation Act, the Endangered Species Act, and related Federal statutes when authorizing lease operations on split estate lands where the surface is not federally owned and the oil and gas is Federal. For split estate lands within FS administrative boundaries, the BLM has the lead responsibility, unless there is a local BLM/FS agreement that gives the FS this responsibility. (e) The operator must make a good faith effort to provide a copy of their Surface Use Plan of Operations to the surface owner. After the APD is approved the operator must make a good faith effort to provide a copy of the Conditions of Approval to the surface owner. The APD approval is not contingent upon delivery of a copy of the Conditions of Approval to the surface owner. § 3171.20 Leases for Indian oil and gas. (a) Approval of operations. (b) Surface use. § 3171.21 Subsequent operations and Sundry Notices. Subsequent operations must follow 43 CFR part 3160, applicable lease stipulations, and APD Conditions of Approval. The operator must file the Sundry Notice in the BLM Field Office having jurisdiction over the lands described in the notice or the operator may file it using the BLM's electronic commerce system. (a) Surface disturbing operations. (i) Undertaking any subsequent new construction outside the approved area of operations; or (ii) Reconstructing or altering existing facilities including, but not limited to, roads, emergency pits, firewalls, flowlines, or other production facilities on any lease that will result in additional surface disturbance. (2) If, at the time the original APD was filed, the lessee or operator elected to defer submitting information under § 3171.8(e)(4)(iii), the lessee or operator must supply this information before construction and installation of the facilities. The BLM, in consultation with any other involved surface managing agency, may require a field inspection before approving the proposal. The lessee or operator may not begin construction until the BLM approves the proposed plan in writing. (3) The operator must certify on Form 3160-5 that they have made a good faith effort to provide a copy of any proposal involving new surface disturbance to the private surface owner in the case of split estate. (b) Emergency repairs. (1) Resulting surface disturbing activities; or (2) Planned accommodations necessary to mitigate potential adverse environmental effects. § 3171.22 Well conversions. (a) Conversion to an injection well. i.e., e.g., (b) Conversion to a water supply well. § 3171.23 Variances. The operator may make a written request to the agency with jurisdiction to request a variance from this subpart. A request for a variance must explain the reason the variance is needed and demonstrate how the operator will satisfy the intent of this subpart. The operator may include the request in the APD package. A variance from the requirements of this subpart does not constitute a variance to provisions of other regulations, laws, or orders. When the BLM is the decision maker on a request for a variance, the decision whether to grant or deny the variance request is entirely within the BLM's discretion. The decision on a variance request is not subject to administrative appeals either to the State Director or pursuant to 43 CFR part 4. § 3171.24 Waivers, exceptions, or modifications. (a) An operator may also request that the BLM waive (permanently remove), except (case-by-case exemption), or modify (permanently change) a lease stipulation for a Federal lease. In the case of Federal leases, a request to waive, except, or modify a stipulation should also include information demonstrating that the factors leading to its inclusion in the lease have changed sufficiently to make the protection provided by the stipulation no longer justified or that the proposed operation would not cause unacceptable impacts. (b) When the waiver, exception, or modification is substantial, the proposed waiver, exception, or modification is subject to public review for 30 days. Prior to such public review, the BLM, and when applicable the FS, will post it in their local Field Office and, when possible, electronically on the internet. When the request is included in the Notice of Staking or APD, the request will be included as part of the application posting under § 3171.5(c). Prior to granting a waiver, exception, or modification, the BLM will obtain the concurrence or approval of the FS or Federal surface managing agency. Decisions on such waivers, exceptions, or modifications are subject to appeal pursuant to 43 CFR part 4. (c) After drilling has commenced, the BLM and the FS may consider verbal requests for waivers, exceptions, or modifications. However, the operator must submit a written notice within 7 days after the verbal request. The BLM and the FS will confirm in writing any verbal approval. Decisions on waivers, exceptions, or modifications submitted after drilling has commenced are final for the Department of the Interior and not subject to administrative review by the State Director or appeal pursuant to 43 CFR part 4. § 3171.25 Abandonment. In accordance with the requirements of 43 CFR 3162.3-4, before starting abandonment operations the operator must submit a Notice of Intent to Abandon on Sundry Notices and Reports on Wells, Form 3160-5. If the operator proposes to modify the plans for surface reclamation approved at the APD stage, the operator must attach these modifications to the Notice of Intent to Abandon. (a) Plugging. (b) Reclamation. (1) For wells not having an approved plan for surface reclamation, operators must submit to the BLM a proposal describing the procedures to be followed for complete abandonment, including a map showing the disturbed area and roads to be reclaimed. The BLM will forward the request to the FS or other surface managing agency. If applicable, the private surface owner will be notified and their views will be carefully considered. (2) Earthwork for interim and final reclamation must be completed within 6 months of well completion or well plugging (weather permitting). All pads, pits, and roads must be reclaimed to a satisfactorily revegetated, safe, and stable condition, unless an agreement is made with the landowner or surface managing agency to keep the road or pad in place. Pits containing fluid must not be breached (cut) and pit fluids must be removed or solidified before backfilling. Pits may be allowed to air dry subject to BLM or FS approval, but the use of chemicals to aid in fluid evaporation, stabilization, or solidification must have prior BLM or FS approval. Seeding or other activities to reestablish vegetation must be completed within the time period approved by the BLM or the FS. (3) Upon completion of reclamation operations, the lessee or operator must notify the BLM or the FS using Form 3160-5, Final Abandonment Notice, when the location is ready for inspection. Final abandonment will not be approved until the surface reclamation work required in the Surface Use Plan of Operations or Subsequent Report of Plug and Abandon has been completed to the satisfaction of the BLM or the FS and surface managing agency, if appropriate. § 3171.26 Appeal procedures. (a) Complete information concerning the review and appeal processes for BLM actions is contained in 43 CFR parts 4 and 3160, subpart 3165. Incorporation of a FS approved Surface Use Plan of Operations into the approval of an APD or a Master Development Plan is not subject to protest to the BLM or appeal to the Interior Board of Land Appeals. (b) The FS's decisions approving use of NFS lands may be subject to agency appeal procedures, in accordance with 36 CFR part 215 or 251. (c) Decisions governing Surface Use Plan of Operations and Special Use Authorization approvals on NFS lands that involve analysis, documentation, and other requirements of the NEPA may be subject to agency appeal procedures, under 36 CFR part 215. (d) The FS's regulations at 36 CFR part 251 govern appeals by an operator of written FS decisions related to Conditions of Approval or administration of Surface Use Plans of Operations or Special Use Authorizations to occupy and use NFS lands. (e) The operator may appeal decisions of the BIA under 25 CFR part 2. Appendix A to Subpart 3171—Sample Format for Notice of Staking (Not to be used in place of Application for Permit to Drill or Reenter Form 3160-3) 1. Oil Well Gas Well Other (Specify) 2. Name, Address, and Telephone of Operator 3. Name and Telephone of Specific Contact Person 4. Surface Location of Well Attach: (a) Sketch showing road entry onto pad, pad dimensions, and reserve pit (b) Topographical or other acceptable map ( e.g., 1/2 5. Lease Number 6. If Indian, Allottee or Tribe Name 7. Unit Agreement Name 8. Well Name and Number 9. American Petroleum Institute (API) Well Number (if available) 10. Field Name or Wildcat 11. Section, Township, Range, Meridian; or Block and Survey; or Area 12. County, Parish, or Borough 13. State 14. Name and Depth of Formation Objective(s) 15. Estimated Well Depth 16. For directional or horizontal wells, anticipated bottom-hole location. 17. Additional Information (as appropriate; include surface owner's name, address and, if known, telephone). 18. Signed Title Date Note: (a) H 2 (b) Cultural Resources (Archeology); and (c) Federal Right-of-Way or Special Use Permit. Subpart 3172—Drilling Operations on Federal and Indian Oil and Gas Leases Source: 88 FR 39516, June 16, 2023, unless otherwise noted. § 3172.1 Authority. (a) This subpart is established pursuant to the authority granted to the Secretary of the Interior pursuant to various Federal and Indian mineral leasing statutes and the Federal Oil and Gas Royalty Management Act of 1982. This authority has been delegated to the Bureau of Land Management and is implemented by the onshore oil and gas operating regulations contained in 43 CFR part 3160. (b) Specific authority for the provisions contained in this subpart is found at: 43 CFR 3162.3-1, 3162.3-4, 3162.4-1, 3162.4-3, 3162.5-1, 3162.5-2 (see paragraph (a)), and 3162.5-3; and 43 CFR part 3160, subpart 3163. § 3172.2 Purpose. This subpart details the Bureau's uniform national standards for the minimum levels of performance expected from lessees and operators when conducting drilling operations on Federal and Indian lands (except Osage Tribe) and for abandonment immediately following drilling. The purpose also is to identify the enforcement actions that will result when violations of the minimum standards are found, and when those violations are not abated in a timely manner. § 3172.3 Scope. This subpart is applicable to all onshore Federal and Indian (except Osage Tribe) oil and gas leases. § 3172.4 General. (a) If an operator chooses to use higher rated equipment than that authorized in the Application for Permit to Drill (APD), testing procedures shall apply to the approved working pressures, not the upgraded higher working pressures. (b) Some situations may exist either on a well-by-well or field-wide basis whereby it is commonly accepted practice to vary a particular minimum standard(s) established in this subpart. This situation may be resolved by requesting a variance (see § 3172.13), by the inclusion of a stipulation to the APD, or by the issuance of a Notice to Lessees and Operators (NTL) by the appropriate BLM office. (c) When a violation is discovered, and if it does not cause or threaten immediate substantial and adverse impact on public health and safety, the environment, production accountability or royalty income, it will be classified as minor. The violation may be reissued as a major violation if not corrected during the abatement period and continued drilling has changed the adverse impact of the violation so that it meets the specific definition of a major violation. (d) This subpart is not intended to circumvent the reporting requirements or compliance aspects that may be stated elsewhere in existing NTLs, regulations, etc. A lessee's compliance with the requirements of the regulations in this subpart shall not relieve the lessee of the obligation to comply with other applicable laws and regulations in accordance with 43 CFR 3162.5-1(c). Lessees should give special attention to the automatic assessment provisions in 43 CFR 3163.1(b). (e) This subpart is based upon the assumption that operations have been approved in accordance with 43 CFR part 3160 and subpart 3171 of this part. Failure to obtain approval prior to commencement of drilling or related operations shall subject the operator to immediate assessment under 43 CFR 3163.1(b)(2). § 3172.5 Definitions. As used in this subpart, the term: 2M, 3M, 5M, 10M, 15M Abnormal pressure zone Bleed line Blooie line Drilling spool Exploratory well Fill-up line Flare line Functionally operated Isolating Lease Lessee Make-up water Manual locking device Mud for plugging purposes Mudding up Operating rights owner (or owner) Operational Operator Precharge pressure Prompt correction Prospectively valuable deposit of minerals Tagging the plug Targeted tee or turn Usable water Weep hole § 3172.6 Well control. (a) Requirements. (b) Violation classifications. (1) Minimum standards and enforcement provisions for well control equipment. Table 1 to § 3172.6( b i Violation Corrective action Normal abatement period Major Install the equipment as specified Prompt correction required. (ii) For 2M system: (A) Annular preventer, double ram, or two rams with one being blind and one being a pipe ram (major); (B) Kill line (2 inch minimum); (C) 1 kill line valve (2 inch minimum); (D) 1 choke line valve; (E) 2 chokes (refer to diagram in appendix A to this subpart); (F) Upper kelly cock valve with handle available; (G) Safety valve and subs to fit all drill strings in use; (H) Pressure gauge on choke manifold; (I) 2 inch minimum choke line; and (J) Fill-up line above the uppermost preventer. Table 2 to § 3172.6( b ii Violation Corrective action Normal abatement period Minor Install the equipment as specified 24 hours. Major (as indicated) Install the equipment as specified Prompt correction required. (iii) For 3M system: (A) Annular preventers (major); (B) Double ram with blind rams and pipe rams (major); (C) Drilling spool, or blowout preventer with 2 side outlets (choke side shall be a 3-inch minimum diameter, kill side shall be at least 2-inch diameter) (major); (D) Kill line (2 inch minimum); (E) A minimum of 2 choke line valves (3 inch minimum) (major); (F) 3 inch diameter choke line; (G) 2 kill line valves, one of which shall be a check valve (2 inch minimum) (major); (H) 2 chokes (refer to diagram in appendix A to this subpart); (I) Pressure gauge on choke manifold; (J) Upper kelly cock valve with handle available; (K) Safety valve and subs to fit all drill string connections in use; (L) All BOPE connections subjected to well pressure shall be flanged, welded, or clamped (major); and (M) Fill-up line above the uppermost preventer. Table 3 to § 3172.6( b iii Violation Corrective action Normal abatement period Minor Install the equipment as specified 24 hours. Major (as indicated) Install the equipment as specified Prompt correction required. (iv) For 5M system: (A) Annular preventer (major); (B) Pipe ram, blind ram, and, if conditions warrant, as specified by the authorized officer, another pipe ram shall also be required (major); (C) A second pipe ram preventer or variable bore pipe ram preventer shall be used with a tapered drill string; (D) Drilling spool, or blowout preventer with 2 side outlets (choke side shall be a 3-inch minimum diameter, kill side shall be at least 2-inch diameter) (major); (E) 3 inch diameter choke line; (F) 2 choke line valves (3 inch minimum) (major); (G) Kill line (2 inch minimum); (H) 2 chokes with 1 remotely controlled from rig floor (refer to diagram in appendix A to this subpart); (I) 2 kill line valves and a check valve (2 inch minimum) (major); (J) Upper kelly cock valve with a handle available; (K) When the expected pressures approach working pressure of the system, 1 remote kill line tested to stack pressure (which shall run to the outer edge of the substructure and be unobstructed); (L) Lower kelly cock valve with handle available; (M) Safety valve(s) and subs to fit all drill string connections in use; (N) Inside BOP or float sub available; (O) Pressure gauge on choke manifold; (P) All BOPE connections subjected to well pressure shall be flanged, welded, or clamped (major); and (Q) Fill-up line above the uppermost preventer. Table 4 to § 3172.6( b iv Violation Corrective action Normal abatement period Minor Install the equipment as specified 24 hours. Major (as indicated) Install the equipment as specified Prompt correction required. (v) For 10M & 15M system: (A) Annular preventer (major); (B) 2 pipe rams (major); (C) Blind rams (major); (D) Drilling spool, or blowout preventer with 2 side outlets (choke side shall be a 3-inch minimum diameter, kill side shall be at least 2-inch diameter) (major): (E) 3 inch choke line (major); (F) 2 kill line valves (2 inch minimum) and check valve (major): (G) Remote kill line (2 inch minimum) shall run to the outer edge of the substructure and be unobstructed; (H) Manual and hydraulic choke line valves (3 inch minimum) (major); (I) 3 chokes, 1 being remotely controlled (refer to diagram in appendix A to this subpart); (J) Pressure gauge on choke manifold; (K) Upper kelly cock valve with handle available; (L) Lower kelly cock valve with handle available; (M) Safety valves and subs to fit all drill string connections in use; (N) Inside BOP or float sub available; (O) Wear ring in casing head; (P) All BOPE connections subjected to well pressure shall be flanged, welded, or clamped (major); and (Q) Fill-up line installed above the uppermost preventer. Table 5 to § 3172.6( b v Violation Corrective action Normal abatement period Minor Install the equipment as specified 24 hours. Major (as indicated) Install the equipment as specified Prompt correction required. (vi) If repair or replacement of the BOPE is required after testing, this work shall be performed prior to drilling out the casing shoe. Table 6 to § 3172.6( b vi Violation Corrective action Normal abatement period Major Install the equipment as specified Prompt correction required. (vii) When the BOPE cannot function to secure the hole, the hole shall be secured using cement, retrievable packer or a bridge plug packer, bridge plug, or other acceptable approved method to assure safe well conditions. Table 7 to § 3172.6( b vii Violation Corrective action Normal abatement period Major Install the equipment as specified Prompt correction required. (2) Minimum standards and enforcement provisions for choke manifold equipment. Table 8 to § 3172.6( b i Violation Corrective action Normal abatement period Minor Install the equipment as specified 24 hours. (ii) Choke manifold equipment configuration shall be functionally equivalent to the appropriate example diagram shown in appendix A of this subpart. The configuration of the chokes may vary. Table 9 to § 3172.6( b ii Violation Corrective action Normal abatement period Minor Install the equipment as specified Prompt correction required. (iii) All valves (except chokes) in the kill line, choke manifold, and choke line shall be a type that does not restrict the flow (full opening) and that allows a straight through flow (same enforcement as paragraph (b)(2)(ii) of this section). (iv) Pressure gauges in the well control system shall be a type designed for drilling fluid service (same enforcement as paragraph (b)(2)(ii) of this section). (3) Minimum standards and enforcement provisions for pressure accumulator system. Table 10 to § 3172.6( b i Violation Corrective action Normal abatement period Minor Install the equipment as specified 24 hours. (ii) 3M system—accumulator shall have sufficient capacity to open the hydraulically controlled choke line valve (if so equipped), close all rams plus the annual preventer, and retain a minimum of 200 psi above precharge on the closing manifold without the use of the closing unit pumps. This is a minimum requirement. The fluid reservoir capacity shall be double the usable fluid volume of the accumulator system capacity and the fluid level of the reservoir shall be maintained at the manufacturer's recommendations. The 3M system shall have 2 independent power sources to close the preventers. Nitrogen bottles (3 minimum) may be 1 of the independent power sources and, if so, shall maintain a charge equal to the manufacturer's specifications. Table 11 to § 3172.6( b ii Violation Corrective action Normal abatement period Minor Install the equipment as specified 24 hours. (iii) 5M and higher system—accumulator shall have sufficient capacity to open the hydraulically controlled gate valve (if so equipped) and close all rams plus the annular preventer (for 3 ram systems add a 50 percent safety factor to compensate for any fluid loss in the control system or preventers) and retain a minimum pressure of 200 psi above precharge on the closing manifold without use of the closing unit pumps. The fluid reservoir capacity shall be double the usable fluid volume of the accumulator system capacity and the fluid level of the reservoir shall be maintained at the manufacturer's recommendations. Two independent sources of power shall be available for powering the closing unit pumps. Sufficient nitrogen bottles are suitable as a backup power source only, and shall be recharged when the pressure falls below manufacturer's specifications. Table 12 to § 3172.6( b iii Violation Corrective action Normal abatement period Minor Install the equipment as specified 24 hours. (4) Minimum standards and enforcement provisions for accumulator precharge pressure test. Table 13 to § 3172.6( b Accumulator working Minimum acceptable Desired precharge Maximum acceptable Minimum acceptable 1,500 1,500 750 800 700 2,000 2,000 1,000 1,100 900 3,000 3,000 1,000 1,100 900 Table 14 to § 3172.6( b Violation Corrective action Normal abatement period Minor Perform test 24 hours. (5) Minimum standards and enforcement provisions for power availability. Table 15 to § 3172.6( b Violation Corrective action Normal abatement period Major Install the equipment as specified Prompt correction required. (6) Minimum standards and enforcement provisions for accumulator pump capacity. Table 16 to § 3172.6( b Violation Corrective action Normal abatement period Minor Install the equipment as specified 24 hours. (7) Minimum standards and enforcement provisions for locking devices. i.e., Table 17 to § 3172.6( b Violation Corrective action Normal abatement period Minor Install the equipment as specified 24 hours. (8) Minimum standards and enforcement provisions for remote controls. Table 18 to § 3172.6( b Violation Corrective action Normal abatement period Minor Install the equipment as specified 24 hours. (9) Minimum standards and enforcement provisions for well control equipment testing. (ii) Ram type preventers and associated equipment shall be tested to approved (see § 3172.4(a)) stack working pressure if isolated by test plug or to 70 percent of internal yield pressure of casing if BOP stack is not isolated from casing. Pressure shall be maintained for at least 10 minutes or until requirements of test are met, whichever is longer. If a test plug is utilized, no bleed-off of pressure is acceptable. For a test not utilizing a test plug, if a decline in pressure of more than 10 percent in 30 minutes occurs, the test shall be considered to have failed. Valve on casing head below test plug shall be open during test of BOP stack. (iii) Annular type preventers shall be tested to 50 percent of rated working pressure. Pressure shall be maintained at least 10 minutes or until provisions of test are met, whichever is longer. (iv) As a minimum, the test in paragraphs (b)(9)(ii) and (iii) of this section shall be performed: (A) When initially installed; (B) Whenever any seal subject to test pressure is broken; (C) Following related repairs; and (D) At 30-day intervals. (v) Valves shall be tested from working pressure side during BOPE tests with all down stream valves open. (vi) When testing the kill line valve(s), the check valve shall be held open or the ball removed. (vii) Annular preventers shall be functionally operated at least weekly. (viii) Pipe and blind rams shall be activated each trip, however, this function need not be performed more than once a day. (ix) A BOPE pit level drill shall be conducted weekly for each drilling crew. (x) Pressure tests shall apply to all related well control equipment. (xi) All of the tests described in paragraphs (b)(9)(ii) through (x) of this section and/or drills shall be recorded in the drilling log. Table 19 to § 3172.6( b Violation Corrective action Normal abatement period Minor Perform the necessary test or provide documentation 24 hours or next trip, as most appropriate. [81 FR 81421, Nov. 17, 2016, as amended at 88 FR 74890, Nov. 1, 2023] § 3172.7 Casing and cementing. (a) Requirements. (1) Minimum design factors for tensions, collapse, and burst that are incorporated into the casing design by an operator/lessee shall be submitted to the authorized operator for his review and approval along with the APD for all exploratory wells or as otherwise specified by the authorized officer. (2) Casing design shall assume formation pressure gradients of 0.44 to 0.50 psi per foot for exploratory wells (lacking better data). (3) Casing design shall assume fracture gradients from 0.70 to 1.00 psi per foot for exploratory wells (lacking better data). (4) Casing collars shall have a minimum clearance of 0.422 inches on all sides in the hole/casing annulus, with recognition that variances can be granted for justified exceptions. (5) All waiting on cement times shall be adequate to achieve a minimum of 500 psi compressive strength at the casing shoe prior to drilling out. (b) Minimum standards and enforcement provisions for casing and cementing. 1/2 Table 1 to § 3172.7( b Violation Corrective action Normal abatement period Major Perform remedial action as specified by the authorized officer Prompt correction required. (2) For liners, a minimum of 100 feet of overlap between a string of casing and the next larger casing is required. The interval of overlap shall be sealed and tested. The liner shall be tested by a fluid entry or pressure test to determine whether a seal between the liner top and next larger string has been achieved. The test pressure shall be the maximum anticipated pressure to which the seal will be exposed. No test shall be required for liners that do not incorporate or need a seal mechanism. Table 2 to § 3172.7( b Violation Corrective action Normal abatement period Minor Perform remedial action as specified by the authorized officer Upon determination of corrective action. (3) The surface casing shall be cemented back to surface either during the primary cement job or by remedial cementing. Table 3 to § 3172.7( b Violation Corrective action Normal abatement period Major Perform remedial cementing Prompt correction required. (4) All of the tests described in paragraphs (b)(1) through (3) of this section shall be recorded in the drilling log. Table 4 to § 3172.7( b Violation Corrective action Normal abatement period Minor Perform the necessary test or provide documentation 24 hours. (5) All indications of usable water shall be reported to the authorized officer prior to running the next string of casing or before plugging orders are requested, whichever occurs first. Table 5 to § 3172.7( b Violation Corrective action Normal abatement period Major Report information as required Prompt correction required. (6) Surface casing shall have centralizers on the bottom 3 joints of the casing (a minimum of 1 centralizer per joint, starting with the shoe joint). Table 6 to § 3172.7( b Violation Corrective action Normal abatement period Major Logging/testing may be required to determine the quality of the job. Recementing may then be specified Prompt correction upon determination of corrective action. (7) Top plugs shall be used to reduce contamination of cement by displacement fluid. A bottom plug or other acceptable technique, such as a suitable preflush fluid, inner string cement method, etc., shall be utilized to help isolate the cement from contamination by the mud fluid being displaced ahead of the cement slurry. Table 7 to § 3172.7( b Violation Corrective action Normal abatement period Major Logging may be required to determine the quality of the cement job. Recementing or further recementing may then be specified Based upon determination of corrective action. (8) All casing strings below the conductor shall be pressure tested to 0.22 psi per foot of casing string length or 1,500 psi, whichever is greater, but not to exceed 70 percent of the minimum internal yield. If pressure declines more than 10 percent in 30 minutes, corrective action shall be taken. Table 8 to § 3172.7( b Violation Corrective action Normal abatement period Minor Perform the test and/or remedial action as specified by the authorized officer 24 hours. (9) On all exploratory wells, and on that portion of any well approved for a 5M BOPE system or greater, a pressure integrity test of each casing shoe shall be performed. Formation at the shoe shall be tested to a minimum of the mud weight equivalent anticipated to control the formation pressure to the next casing depth or at total depth of the well. This test shall be performed before drilling more than 20 feet of new hole. Table 9 to § 3172.7( b Violation Corrective action Normal abatement period Minor Perform the specified test 24 hours. § 3172.8 Mud program. (a) Requirements. (b) Minimum standards and enforcement provisions for mud program and equipment. Table 1 to § 3172.8( b Violation Corrective action Normal abatement period Minor Record required information 24 hours. (2) Visual mud monitoring equipment shall be in place to detect volume changes indicating loss or gain of circulating fluid volume. Table 2 to § 3172.8( b Violation Corrective action Normal abatement period Minor Install necessary equipment 24 hours. (3) When abnormal pressures are anticipated, electronic/mechanical mud monitoring equipment shall be required, which shall include as a minimum: pit volume totalizer (PVT); stroke counter; and flow sensor. Table 3 to § 3172.8( b Violation Corrective action Normal abatement period Minor Install necessary instrumentation 24 hours. (4) A mud test shall be performed every 24 hours after mudding up to determine, as applicable: density, viscosity, gel strength, filtration, and pH. Table 4 to § 3172.8( b Violation Corrective action Normal abatement period Minor Perform necessary tests 24 hours. (5) A trip tank shall be used on 10M and 15M systems and on upgraded 5M systems as determined by the authorized officer. Table 5 to § 3172.8( b Violation Corrective action Normal abatement period Minor Install necessary equipment 24 hours. (6)(i) Gas detecting equipment shall be installed in the mud return system for exploratory wells or wells where abnormal pressure is anticipated, and hydrocarbon gas shall be monitored for pore pressure changes. (ii) Hydrogen sulfide safety and monitoring equipment requirements may be found in subpart 3176 of this part. Table 6 to § 3172.8( b ii Violation Corrective action Normal abatement period Minor Install necessary equipment 24 hours. (7) All flare systems shall be designed to gather and burn all gas. The flare line(s) discharge shall be located not less than 100 feet from the well head, having straight lines unless turns are targeted with running tees, and shall be positioned downwind of the prevailing wind direction and shall be anchored. The flare system shall have an effective method for ignition. Where noncombustible gas is likely or expected to be vented, the system shall be provided supplemental fuel for ignition and to maintain a continuous flare. Table 6 to § 3172.8( b Violation Corrective action Normal abatement period Major Install equipment as specified 24 hours. (8) A mud-gas separator (gas buster) shall be installed and operable for all systems of 10M or greater and for any system where abnormal pressure is anticipated beginning at a point at least 500 feet above any anticipated hydrocarbon zone of interest. Table 8 to § 3172.8( b Violation Corrective action Normal abatement period Minor Install required equipment Prompt correction required. § 3172.9 Drill stem testing. (a) Requirements. i.e., (b) Minimum standards for drill stem testing. Table 1 to § 3172.9( b Violation Corrective action Normal abatement period Major Contingent on circumstances and as specified by the authorized officer Prompt correction required. (2) Separation equipment required for the anticipated recovery shall be properly installed before a test starts. Table 2 to § 3172.9( b Violation Corrective action Normal abatement period Major Install required equipment Prompt correction required. (3) All engines within 100 feet of the wellbore that are required to “run” during the test shall have spark arresters or water-cooled exhausts. Table 3 to § 3172.9( b Violation Corrective action Normal abatement period Major Install required equipment Prompt correction required. § 3172.10 Special drilling operations. (a) In addition to the equipment already specified elsewhere in this subpart, the following equipment shall be in place and operational during air/gas drilling: (1) Properly lubricated and maintained rotating head (major); (2) Spark arresters on engines or water-cooled exhaust (major); (3) Blooie line discharge 100 feet from well bore and securely anchored; (4) Straight run on blooie line unless otherwise approved; (5) Deduster equipment (major); (6) All cuttings and circulating medium shall be directed into a reserve or blooie pit (major); (7) Float valve above bit (major); (8) Automatic igniter or continuous pilot light on the blooie line (major); (9) Compressors located in the opposite direction from the blooie line a minimum of 100 feet from the well bore; and (10) Mud circulating equipment, water, and mud materials (does not have to be premixed) sufficient to maintain the capacity of the hole and circulating tanks or pits. Table 1 to § 3172.10( a Violation Corrective action Normal abatement period Minor Install the equipment as specified 24 hours. Major (as indicated) Install the equipment as specified Prompt correction required. (b) Hydrogen sulfide operation is specifically addressed under subpart 3176 of this part. § 3172.11 Surface use. (a) Responsibilities. (b) Minimum standards and enforcement provisions for surface use. (c) Violation. § 3172.12 Drilling abandonment. (a) Requirements. (1) Open hole. (A) Any zone encountered during drilling which contains fluid or gas with a potential to migrate; and (B) Any prospectively valuable deposit of minerals. (ii) All cement plugs, except the surface plug, shall have sufficient slurry volume to fill 100 feet of hole, plus an additional 10 percent of slurry for each 1,000 feet of depth. (iii) No plug, except the surface plug, shall be less than 25 sacks without receiving specific approval from the authorized officer. (iv) Extremely thick sections of a single formation may be secured by placing 100-foot plugs across the top and bottom of the formation, and in accordance with paragraph (a)(1)(ii) of this section. (v) In the absence of productive zones or prospectively valuable deposits of minerals which otherwise require placement of cement plugs, long sections of open hole shall be plugged at least every 3,000 feet. Such plugs shall be placed across in-gauge sections of the hole, unless otherwise approved by the authorized officer. (B)[Reserved] (2) Cased hole. (i) The bridge plug is set within 50 feet to 100 feet above the open perforations; (ii) The perforations are isolated from any open hole below; and (iii) The bridge plug is capped with 50 feet of cement. If a bailer is used to cap this plug, 35 feet of cement shall be sufficient. (3) Casing removed from hole. (4) Cement plug. (5) Annular space. (6) Isolating medium. (7) Silica sand or silica flour. (8) Surface plug. (9) Mud. (10) Surface cap. 1/4 (11) Cellar. (b) Minimum standard. Table 1 to § 3172.12( b Violation Corrective action Normal abatement period Major Contingent upon circumstances Prompt correction required. § 3172.13 Variances from minimum standards. (a) An operator may request the authorized officer to approve a variance from any of the minimum standards prescribed in §§ 3172.6 through 3172.12. All such requests shall be submitted in writing to the appropriate authorized officer and provide information as to the circumstances which warrant approval of the variance(s) requested and the proposed alternative methods by which the related minimum standard(s) are to be satisfied. The authorized officer, after considering all relevant factors, if appropriate, may approve the requested variance(s) if it is determined that the proposed alternative(s) meet or exceed the objectives of the applicable minimum standard(s). (b) Emergency or other situations of an immediate nature that could not be reasonably foreseen at the time of APD approval may receive oral approval. However, such requests shall be followed up by a written notice filed not later than the fifth business day following oral approval. Appendix A to Subpart 3172—Diagrams of Choke Manifold Equipment Figure 1 to Appendix A to Subpart 3172—2M Choke Manifold Equipment Figure 2 to Appendix A to Subpart 3172—3M Choke Manifold Equipment Figure 3 to Appendix A to Subpart 3172—5M Choke Manifold Equipment Figure 4 to Appendix A to Subpart 3172—10M and 15M Choke Manifold Equipment Subpart 3173—Requirements for Site Security and Production Handling § 3173.1 Definitions and acronyms. (a) As used in this subpart, the term: Access (i) Add liquids to or remove liquids from any tank or piping system, through a valve or combination of valves or by moving liquids from one tank to another tank; or (ii) Enter any component in a measuring system affecting the accuracy of the measurement of the quality or quantity of the liquid being measured. Appropriate valves e.g., Authorized representative (AR) Business day Commingling and allocation approval (CAA) Economically marginal property Effectively sealed Free water Land description Manual of Surveying Instructions Maximum ultimate economic recovery Mishandling Payout period Permanent measurement facility Piping e.g., Production phase Royalty Net Present Value (RNPV) Sales phase Seal (b) As used in this subpart, the following additional acronyms apply: BIA BMP § 3173.2 Storage and sales facilities—seals. (a) All lines entering or leaving any oil storage tank must have valves capable of being effectively sealed during the production and sales phases unless otherwise provided under this subpart. During the production phase, all appropriate valves that allow unmeasured production to be removed from storage must be effectively sealed in the closed position. During any other phase (sales, water drain, or hot oiling), and prior to taking the top tank gauge measurement, all appropriate valves that allow unmeasured production to enter or leave the sales tank must be effectively sealed in the closed position (see Appendix A to subpart 3173). Each unsealed or ineffectively sealed appropriate valve is a separate violation. (b) Valves or combinations of valves and tanks that provide access to the production before it is measured for sales are considered appropriate valves and are subject to the seal requirements of this subpart (see Appendix A to subpart 3173). If there is more than one valve on a line from a tank, the valve closest to the tank must be sealed. All appropriate valves must be in an operable condition and accurately reflect whether the valve is open or closed. (c) The following are not considered appropriate valves and are not subject to the sealing requirements of this subpart: (1) Valves on production equipment ( e.g., (2) Valves on water tanks, provided that the possibility of access to production in the sales and storage tanks does not exist through a common circulating, drain, overflow, or equalizer system; (3) Valves on tanks that contain oil that has been determined by the AO or AR to be waste or slop oil; (4) Sample cock valves used on piping or tanks with a Nominal Pipe Size of 1 inch or less in diameter; (5) Fill-line valves during shipment when a single tank with a nominal capacity of 500 barrels (bbl) or less is used for collecting marginal production of oil produced from a single well ( i.e., (6) Gas line valves used on piping with a Nominal Pipe Size of 1 inch or less used as tank bottom “roll” lines, provided there is no access to the contents of the storage tank and the roll lines cannot be used as equalizer lines; (7) Valves on tank heating systems that use a fluid other than the contents of the storage tank ( i.e., (8) Valves used on piping with a Nominal Pipe Size of 1 inch or less connected directly to the pump body or used on pump bleed off lines; (9) Tank vent-line valves; and (10) Sales, equalizer, or fill-line valves on systems where production may be removed only through approved oil metering systems ( e.g., (d) Tampering with any appropriate valve is prohibited. Tampering with an appropriate valve may result in an assessment of civil penalties for knowingly or willfully preparing, maintaining, or submitting false, inaccurate, or misleading reports, records, or written information under 30 U.S.C. 1719(d)(1) and 43 CFR 3163.2(f)(1), or knowingly or willfully taking, removing, transporting, using, or diverting oil or gas from a lease site without valid legal authority under 30 U.S.C. 1719(d)(2) and 43 CFR 3163.2(f)(2), together with any other remedies provided by law. § 3173.3 Oil measurement system components—seals. (a) Components used for quantity or quality determination of oil must be effectively sealed to indicate tampering, including, but not limited to, the following components of LACT meters (see § 3174.8(a)) and CMSs (see § 3174.9(e)): (1) Sample probe; (2) Sampler volume control; (3) All valves on lines entering or leaving the sample container, excluding the safety pop-off valve (if so equipped). Each valve must be sealed in the open or closed position, as appropriate; (4) Meter assembly, including the counter head and meter head; (5) Temperature averager; (6) LACT meters or CMS; (7) Back pressure valve pressure adjustment downstream of the meter; (8) Any drain valves in the system; (9) Manual-sampling valves (if so equipped); (10) Valves on diverter lines larger than 1 inch in nominal diameter; (11) Right-angle drive; (12) Totalizer; and (13) Prover connections. (b) Each missing or ineffectively sealed component is a separate violation. § 3173.4 Federal seals. (a) In addition to any INC issued for a seal violation, the AO or AR may place one or more Federal seals on any appropriate valve, sealing device, or oil-metering-system component that does not comply with the requirements in §§ 3173.2 and 3173.3 if the operator is not present, refuses to cooperate with the AO or AR, or is unable to correct the noncompliance. (b) The placement of a Federal seal does not constitute compliance with the requirements of §§ 3173.2 and 3173.3. (c) A Federal seal may not be removed without the approval of the AO or AR. § 3173.5 Removing production from tanks for sale and transportation by truck. (a) When a single truck load constitutes a completed sale, the driver must possess documentation containing the information required in § 3174.12. (b) When multiple truckloads are involved in a sale and the oil measurement method is based on the difference between the opening and closing gauges, the driver of the last truck must possess the documentation containing the information required in § 3174.12. All other drivers involved in the sale must possess a trip log or manifest. (c) After the seals have been broken, the purchaser or transporter is responsible for the entire contents of the tank until it is resealed. § 3173.6 Water-draining operations. When water is drained from a production storage tank, the operator, purchaser, or transporter, as appropriate, must document the following information: (a) Federal or Indian lease, unit PA, or CA number(s); (b) The tank location by land description; (c) The unique tank number and nominal capacity; (d) Date of the opening gauge; (e) Opening gauge (gauged manually or automatically), TOV, and free-water measurements, all to the nearest 1/2 (f) Unique identifying number of each seal removed; (g) Closing gauge (gauged manually or automatically) and TOV measurement to the nearest 1/2 (h) Unique identifying number of each seal installed. § 3173.7 Hot oiling, clean-up, and completion operations. (a) During hot oil, clean-up, or completion operations, or any other situation where the operator removes oil from storage, temporarily uses it for operational purposes, and then returns it to storage on the same lease, unit PA, or communitized area, the operator must document the following information: (1) Federal or Indian lease, unit PA, or CA number(s); (2) Tank location by land description; (3) Unique tank number and nominal capacity; (4) Date of the opening gauge; (5) Opening gauge measurement (gauged manually or automatically) to the nearest 1/2 (6) Unique identifying number of each seal removed; (7) Closing gauge measurement (gauged manually or automatically) to the nearest 1/2 (8) Unique identifying number of each seal installed; (9) How the oil was used; and (10) Where the oil was used ( i.e., (b) During hot oiling, line flushing, or completion operations or any other situation where the operator removes production from storage for use on a different lease, unit PA, or communtized area, the production is considered sold and must be measured in accordance with the applicable requirements of this subpart and reported as sold to ONRR on the OGOR under 30 CFR part 1210 subpart C for the period covering the production in question. § 3173.8 Report of theft or mishandling of production. (a) No later than the next business day after discovery of an incident of apparent theft or mishandling of production, the operator, purchaser, or transporter must report the incident to the AO. All oral reports must be followed up with a written incident report within 10 business days of the oral report. (b) The incident report must include the following information: (1) Company name and name of the person reporting the incident; (2) Lease, unit PA, or CA number, well or facility name and number, and FMP number, as appropriate; (3) Land description of the facility location where the incident occurred; (4) The estimated volume of production removed; (5) The manner in which access was obtained to the production or how the mishandling occurred; (6) The name of the person who discovered the incident; (7) The date and time of the discovery of the incident; and (8) Whether the incident was reported to local law enforcement agencies and/or company security. § 3173.9 Required recordkeeping for inventory and seal records. (a) The operator must perform an end-of-month inventory (gauged manually or automatically) that records: TOV in storage (measured to the nearest 1/2 (1) The end-of-month inventory must be completed within ± 3 days of the last day of the calendar month; or (2) The end of month inventory must be a calculated “end of month” inventory based on daily production that takes place between two measured inventories that are not more than 31, nor fewer than 20, days apart. The calculated monthly inventory is determined based on the following equation: {[(X + Y − W)/Z1] * Z2} + X = A, Where: A = calculated end of month inventory; W = first inventory measurement; X = second inventory measurement; Y = gross sales volume between the first and second inventory; Z1 = number of actual days produced between the first and second inventory; and Z2 = number of actual days produced between the second inventory and end of calendar month for which the OGOR report is due. For example: {[(150 bbl + 198 bbl − 125 bbl)/29 days] * 16 days} + 150 bbl = 273 bbl for the February end-of-month inventory. (b) For each seal, the operator must maintain a record that includes: (1) The unique identifying number of each seal and the valve or meter component on which the seal is or was used; (2) The date of installation or removal of each seal; (3) For valves, the position (open or closed) in which it was sealed; and (4) The reason the seal was removed. § 3173.10 Form 3160-5, Sundry Notices and Reports on Wells. (a) The operator must submit a Form 3160-5, Sundry Notices and Reports on Wells (Sundry Notice) for the following: (1) Site facility diagrams (see § 3173.11); (2) Request for an FMP number (see § 3173.12); (3) Request for FMP amendments (see § 3173.13(b)); (4) Requests for approval of off-lease measurement (see § 3173.23); (5) Request to amend an approval of off-lease measurement (see § 3173.23(k)); (6) Requests for approval of CAAs (see § 3173.15); and (7) Request to modify a CAA (see § 3173.18). (b) The operator must submit all Sundry Notices electronically to the BLM office having jurisdiction over the lease, unit, or CA using WIS, unless the submitter: (1) Is a small business, as defined by the U.S. Small Business Administration; and (2) Does not have access to the Internet. § 3173.11 Site facility diagram. (a) A site facility diagram is required for all facilities. (b) Except for the requirement to submit a Form 3160-5, Sundry Notice, with the site facility diagram, no format is prescribed for site facility diagrams. The diagram should be formatted to fit on an 8 1/2 (c) The diagram must: (1) Reflect the position of the production and water recovery equipment, piping for oil, gas, and water, and metering or other measuring systems in relation to each other, but need not be to scale; (2) Commencing with the header, identify all of the equipment, including, but not limited to, the header, wellhead, piping, tanks, and metering systems located on the site, and include the appropriate valves and any other equipment used in the handling, conditioning, or disposal of production and water, and indicate the direction of flow; (3) Identify by API number the wells flowing into headers; (4) If another operator operates a co-located facility, depict the co-located facility(ies) on the diagram or list them as an attachment and identify them by company name, facility name(s), lease, unit PA, or CA number(s), and FMP number(s); (5) Indicate which valve(s) must be sealed and in what position during the production and sales phases and during the conduct of other production activities ( e.g., (6) When describing co-located facilities operated by one operator, include a skeleton diagram of the co-located facility(ies), showing equipment only. For storage facilities common to co-located facilities operated by one operator, one diagram is sufficient; (7) Clearly identify the lease, unit PA, or CA to which the diagram applies, the land description of the facility, and the name of the company submitting the diagram, with co-located facilities being identified for each lease, unit PA, or CA; (8) Clearly identify, on the diagram or as an attachment, all meters and measurement equipment. Specifically identify all approved and assigned FMPs; and (9) If the operator claims royalty-free use, clearly identify the equipment for which the operator claims royalty-free use. The operator must either: (i) For each engine, motor, or major component ( e.g., (ii) Measure the volume used, by meter or tank gauge. (d) At facilities for which the BLM will assign an FMP number under § 3173.12, the operator must submit a new site facility diagram as follows: (1) For facilities that become operational after January 17, 2017, within 30 days after the BLM assigns an FMP; or (2) For a facility that is in service on or before January 17, 2017, and that has a site facility diagram on file with the BLM that meets the minimum requirements of Onshore Oil and Gas Order 3, Site Security, an amended site facility diagram meeting the requirements of this section is not due until 30 days after the existing facility is modified, a non-Federal facility located on a Federal lease or federally approved unit or communitized area is constructed or modified, or there is a change in operator. (e) At facilities for which an FMP number is not required under § 3173.12 ( e.g., (1) For new facilities in service after January 17, 2017, the new site facility diagram must be submitted within 30 days after the facility becomes operational; or (2) For a facility that is in service on or before January 17, 2017, and that has a site facility diagram on file with the BLM that meets the minimum requirements of Onshore Oil and Gas Order 3, Site Security, an amended site facility diagram meeting the requirements of this section is not due until 30 days after the existing facility is modified, a non-Federal facility located on a Federal lease or federally approved unit or communitized area is constructed or modified, or there is a change in operator. (f) After a site facility diagram has been submitted that complies with the requirements of this part, the operator has an ongoing obligation to update and amend the diagram within 30 days after such facility is modified, a non-Federal facility located on a Federal lease or federally approved unit or communitized area is constructed or modified, or there is a change in operator. § 3173.12 Applying for a facility measurement point. (a)(1) Unless otherwise approved, the FMP(s) for all Federal and Indian leases, unit PAs, or CAs must be located within the boundaries of the lease, unit, or communitized area from which the production originated and must measure only production from that lease, unit PA, or CA. (2) Off-lease measurement or commingling and allocation of Federal or Indian production requires prior approval (see 43 CFR 3162.7-2, 3162.7-3, 3173.15, 3173.16, 3173.24, and 3173.25). (b) The BLM will not approve as an FMP a gas processing plant tailgate meter located off the lease, unit, or communitized area. (c) The operator must submit separate applications for approval of an FMP that measures oil produced from a lease, unit PA, or CA, or under a CAA that complies with the requirements of this subpart, and an FMP that measures gas produced from the same lease, unit PA, or CA, or under a CAA that complies with the requirements of this subpart. This requirement applies even if the measurement equipment or facilities are at the same location. (d) For a permanent measurement facility that comes into service after January 17, 2017, the operator must apply for approval of the FMP before any production leaves the permanent measurement facility. This requirement does not apply to temporary measurement equipment used during well testing operations. After timely submission and prior to approval of an FMP request, an operator must use the lease, unit PA, or CA number for reporting production to ONRR, until the BLM assigns an FMP number, at which point the operator must use the FMP number for all reporting to ONRR as set forth in § 3173.13. (e) For a permanent measurement facility in service on or before January 17, 2017, the operator must apply for BLM approval of an FMP within the time prescribed in this paragraph, based on the production level of any one of the leases, unit PAs, or CAs, whether or not they are part of a CAA. The deadline to apply for an FMP approval applies to both oil and gas measurement facilities measuring production from that lease, unit PA, or CA. (1) For a stand-alone lease, unit PA, or CA that produced 10,000 Mcf or more of gas per month or 100 bbl or more of oil per month, by January 17, 2018. (2) For a stand-alone lease, unit PA, or CA that produced 1,500 Mcf or more, but less than 10,000 Mcf of gas per month, or 10 bbl or more, but less than 100 bbl of oil per month, by January 17, 2019. (3) For a stand-alone lease, unit PA, or CA that produced less than 1,500 Mcf of gas per month or less than 10 bbl of oil per month, January 17, 2020. (4) For a stand-alone lease, unit PA, or CA that has not produced for a year or more before January 17, 2017, the operator must apply for an FMP prior to the resumption of production. (5) The production levels identified in paragraphs (e)(1) through (3) of this section should be calculated using the average production of oil or gas over the 12 months preceding the effective date of this section or over the period the lease, unit PA, or CA has been in production, whichever is shorter. (6) If the operator of any facility covered by this section applies for an FMP approval by the deadline in this paragraph, the operator may continue using the lease, unit PA, or CA number for reporting production to ONRR, until the BLM's assigns an FMP number, at which point the operator must use the FMP number for all reporting to ONRR as set forth in § 3173.13. (7) If the operator fails to apply for an FMP approval by the deadline in this paragraph, the operator will be subject to an INC and may also be subject to an assessment of a civil penalty under 43 CFR part 3160, subpart 3163, together with any other remedy available under applicable law or regulation. (f) All requests for FMP approval must include the following: (1) A complete Sundry Notice requesting approval of each FMP; (2) The applicable Measurement Type Code specified in WIS; (3) Information about the equipment used for oil and gas measurement, including, for: (i) “Gas measurement,” specify operator/purchaser/transporter unique station number, primary element (meter tube) size or serial number, and type of secondary device (mechanical or electronic); (ii) “Oil measurement by tank gauge,” specify oil tank number or tank serial number and size in barrels or gallons for all tanks associated with measurement at an FMP; and (iii) “Oil measurement by LACT or CMS,” specify whether the equipment is LACT or CMS and the associated oil tank number or tank serial number and size in barrels or gallons (there may be more than one tank associated with an FMP); (4) Where production from more than one well will flow to the requested FMP, list the API well numbers associated with the FMP; and (5) FMP location by land description. (g) Request for approval of an FMP may be submitted concurrently with separate requests for off-lease measurement and/or CAA. § 3173.13 Requirements for approved facility measurement points. (a) For an existing facility in service on or before January 17, 2017, an operator must start using an FMP number for reporting production to ONRR on its OGOR for the fourth production month after the BLM assigns the FMP number(s), and every month thereafter. (For example, for a facility that is assigned an FMP number on January 15, 2016, the effective date of the FMP is the May production report.) For a new facility in service after January 17, 2017, an operator must start using an FMP number for reporting production to ONRR on its OGOR for the first production month after the BLM assigns the FMP number(s), and every month thereafter. (For example, for a facility that is assigned an FMP number on January 15, 2016, the effective date of the FMP is the February production report.) (b)(1) The operator must file a Sundry Notice that describes any changes or modifications made to the FMP within 30 days after the change. This requirement does not apply to temporary modifications ( e.g., (2) The description must include details such as the primary element, secondary element, LACT/CMS meter, tank number(s), and wells or facilities using the FMP. (3) The Sundry Notice must specify what was changed and the effective date, and include, if appropriate, an amended site facility diagram (see § 3173.11). § 3173.14 Conditions for commingling and allocation approval (surface and downhole). (a) Subject to the exceptions provided in paragraph (b) of this section, the BLM may grant a CAA only if the proposed allocation method used for any such commingled measurement does not have the potential to affect the determination of the total volume or quality of production on which royalty owed is determined for all the Federal or Indian leases, unit PAs, or CAs which are proposed for commingling, and only if the following criteria are met: (1) The proposed commingling includes production from more than one: (i) Federal lease, unit PA, or CA, where each lease, unit PA, or CA proposed for commingling has 100 percent Federal mineral interest, the same fixed royalty rate and, and the same revenue distribution; (ii) Indian tribal lease, unit PA, or CA, where each lease, unit PA, or CA proposed for commingling is wholly owned by the same tribe and has the same fixed royalty rate; (iii) Federal unit PA or CA where each unit PA or CA proposed for commingling has the same proportion of Federal interest, and which interest is subject to the same fixed royalty rate and revenue distribution. (For example, the BLM could approve a commingling request under this paragraph where an operator proposes to commingle two Federal CAs of mixed ownership and both CAs are 50 percent Federal/50 percent private, so long as the Federal interests have the same royalty rates and royalty distributions.); or (iv) Indian unit PA or CA where each unit PA or CA proposed for commingling has the same proportion of Indian interests, and which interest is held by the same tribe and has the same fixed royalty rate; and (2) The operator or operators provide a methodology acceptable to BLM for allocation among the properties from which production is to be commingled (including a method for allocating produced water), with a signed agreement if there is more than one operator; (3) For each of the leases, unit PAs, or CAs proposed for inclusion in the CAA, the applicant demonstrates to the AO that a lease, unit PA, or CA proposed for inclusion is producing in paying quantities (or, in the case of Federal leases, capable of production in paying quantities) pending approval of the CAA; and (4) The FMP(s) for the proposed CAA measure production originating only from the leases, unit PAs, or CAs in the CAA. (b) The BLM may also approve a CAA in instances where the proposed commingling of production involves production from Federal or Indian leases, unit PAs, or CAs that do not meet the criteria of paragraph (a)(1) of this section ( e.g., (1) The Federal or Indian lease, unit PA, or CA meets the definition of an economically marginal property. However, if the BLM determines that a Federal or Indian lease, unit PA, or CA included in a CAA ceases to be an economically marginal property, then this condition is no longer met; (2) The average monthly production over the preceding 12 months for each Federal or Indian lease, unit PA, or CA proposed for the CAA on an individual basis is less than 1,000 Mcf of gas per month, or 100 bbl of oil per month; (3) A CAA that includes Indian leases, unit PAs, or CAs has been authorized under tribal law or otherwise approved by a tribe; (4) The CAA covers the downhole commingling of production from multiple formations that are covered by separate leases, unit PAs, or CAs, where the BLM has determined that the proposed commingling from those formations is an acceptable practice for the purpose of achieving maximum ultimate economic recovery and resource conservation; or (5) There are overriding considerations that indicate the BLM should approve a commingling application in the public interest notwithstanding potential negative royalty impacts from the allocation method. Such considerations could include topographic or other environmental considerations that make non-commingled measurement physically impractical or undesirable, in view of where additional measurement and related equipment necessary to achieve non-commingled measurement would have to be located. § 3173.15 Applying for a commingling and allocation approval. To apply for a CAA, the operator(s) must submit the following, if applicable, to the BLM office having jurisdiction over the leases, unit PAs, or CAs from which production is proposed to be commingled: (a) A completed Sundry Notice for approval of commingling and allocation (if off-lease measurement is a feature of the commingling and allocation proposal, then a separate Sundry Notice under § 3173.23 is not necessary as long as the information required under § 3173.23(b) through (e) and, where applicable, § 3173.23(f) through (i) is included as part of the request for approval of commingling and allocation); (b) A completed Sundry Notice for approval of off-lease measurement under § 3173.23, if any of the proposed FMPs are outside the boundaries of any of the leases, units, or CAs from which production would be commingled (which may be included in the same Sundry Notice as the request for approval of commingling and allocation), except as provided in paragraph (a) of this section; (c) A proposed allocation agreement, including an allocation methodology (including allocation of produced water), with an example of how the methodology is applied, signed by each operator of each of the leases, unit PAs, or CAs from which production would be included in the CAA; (d) A list of all Federal or Indian lease, unit PA, or CA numbers in the proposed CAA, specifying the type of production ( i.e., (e) A topographic map or maps of appropriate scale showing the following: (1) The boundaries of all the leases, units, unit PAs, or communitized areas whose production is proposed to be commingled; and (2) The location of existing or planned facilities and the relative location of all wellheads (including the API number) and piping included in the CAA, and existing FMPs or FMPs proposed to be installed to the extent known or anticipated; (f) A surface use plan of operations (which may be included in the same Sundry Notice as the request for approval of commingling and allocation) if new surface disturbance is proposed for the FMP and its associated facilities are located on BLM-managed land within the boundaries of the lease, units, and communitized areas from which production would be commingled; (g) A right-of-way grant application (Standard Form 299), filed under 43 CFR part 2880, if the proposed FMP is on a pipeline, or under 43 CFR part 2800, if the proposed FMP is a meter or storage tank. This requirement applies only when new surface disturbance is proposed for the FMP, and its associated facilities are located on BLM-managed land outside any of the leases, units, or communitized areas whose production would be commingled; (h) Written approval from the appropriate surface-management agency, if new surface disturbance is proposed for the FMP and its associated facilities are located on Federal land managed by an agency other than the BLM; (i) A right-of-way grant application for the proposed FMP, filed under 25 CFR part 169, with the appropriate BIA office, if any of the proposed surface facilities are on Indian land outside the lease, unit, or communitized area from which the production would be commingled; (j) Documentation demonstrating that each of the leases, unit PAs, or CAs proposed for inclusion in the CAA is producing in paying quantities (or, in the case of Federal leases, is capable of production in paying quantities) pending approval of the CAA; and (k) All gas analyses, including Btu content (if the CAA request includes gas) and all oil gravities (if the CAA request includes oil) for previous periods of production from the leases, units, unit PAs, or communitized areas proposed for inclusion in the CAA, up to 6 years before the date of the application for approval of the CAA. Gas analysis and oil gravity data is not needed if the CAA falls under § 3173.14(a)(1). § 3173.16 Existing commingling and allocation approvals. Upon receipt of an operator's request for assignment of an FMP number to a facility associated with a CAA existing on January 17, 2017, the AO will review the existing CAA and take the following action: (a) The AO will grandfather the existing CAA and associated off-lease measurement, where applicable, if the existing CAA meets one of the following conditions: (1) The existing CAA involves downhole commingling that includes Federal or Indian leases, unit PAs, or CAs; or (2) The existing CAA is for surface commingling and the average production rate over the previous 12 months for each Federal or Indian lease, unit PA, and CA included in the CAA is: (i) Less than 1,000 Mcf per month for gas; or (ii) Less than 100 bbl per month for oil. (b) If the existing CAA does not meet the conditions of paragraphs (a)(1) or (a)(2) of this section, the AO will review the CAA for consistency with the minimum standards and requirements for a CAA under § 3173.14. (1) The AO will notify the operator in writing of any inconsistencies or deficiencies with an existing CAA. The operator must correct any inconsistencies or deficiencies that the AO identifies, provide the additional information that the AO has requested, or request an extension of time from the AO, within 20 business days after receipt of the AO's notice. When the AO is satisfied that the operator has corrected any inconsistencies or deficiencies, the AO will terminate the existing CAA and grant a new CAA based on the operator's corrections. (2) The AO may terminate the existing CAA and grant a new CAA with new or amended COAs to make the approval consistent with the requirements under § 3173.14 in connection with approving the requested FMP. If the operator appeals any COAs of the new CAA, the existing CAA approval will continue in effect during the pendency of the appeal. (3) If the existing CAA does not meet the standards and requirements of § 3173.14 and the operator does not correct the deficiencies, the AO may terminate the existing CAA under § 3173.20 and deny the request for an FMP number for the facility associated with the existing CAA. (c) If the AO grants a new CAA to replace an existing CAA under paragraph (b) of this section, the new CAA is effective on the first day of the month following its approval. Any new allocation percentages resulting from the new CAA will apply from the effective date of the CAA forward. § 3173.17 Relationship of a commingling and allocation approval to royalty-free use of production. A CAA does not constitute approval of off-lease royalty-free use of production as fuel in facilities located at an FMP approved under the CAA. § 3173.18 Modification of a commingling and allocation approval. (a) A CAA must be modified when there is: (1) A modification to the allocation agreement; (2) Inclusion of additional leases, unit PAs, or CAs are proposed in the CAA; or (3) Termination of or permanent production cessation from any of the leases, unit PAs, or CAs within the CAA. (b) To request a modification of a CAA, all operators must submit to the AO: (1) A completed Sundry Notice describing the modification requested; (2) A new allocation methodology, including an allocation methodology which includes allocation of produced water and an example of how the methodology is applied, if appropriate; and (3) Certification by each operator in the CAA that it agrees to the CAA modification. (c) A change in operator does not trigger the need to modify a CAA. § 3173.19 Effective date of a commingling and allocation approval. (a) If the BLM approves a CAA, the effective date of the CAA is the first day of the month following first production through the FMPs for the CAA. (b) If the BLM approves a modification, the effective date is the first day of the month following approval of the modification. (c) A CAA does not modify any of the terms of the leases, units, or CAs covered by the CAA. § 3173.20 Terminating a commingling and allocation approval. (a) The AO may terminate a CAA for any reason, including, but not limited to, the following: (1) Changes in technology, regulation, or BLM policy; (2) Operator non-compliance with the terms or COAs of the CAA or this subpart; or (3) The AO determines that a lease, unit, or CA subject to the CAA has terminated, or a unit PA subject to the CAA has ceased production. (b) If only one lease, unit PA, or CA remains subject to the CAA, the CAA terminates automatically. (c) An operator may terminate its participation in a CAA by submitting a Sundry Notice to the BLM. The Sundry Notice must identify the FMP(s) for the lease(s), unit PA(s), or CA(s) previously subject to the CAA. Termination by one operator does not mean the CAA terminates as to all other participating operators, so long as one of the other provisions of this subpart is met and the remaining operators submit a Sundry Notice requesting a new CAA as outlined in paragraph (e) of this section. (d) The AO will notify in writing all operators who are a party to the CAA of the effective date of the termination and any inconsistencies or deficiencies with their CAA approval that serve as the reason(s) for termination. The operator must correct any inconsistencies or deficiencies that the AO identifies, provide the additional information that the AO has requested, or request an extension of time from the AO, within 20 business days after receipt of the BLM's notice, or the CAA is terminated. (e) If a CAA is terminated, each lease, unit PA, or CA that was included in the CAA may require a new FMP number(s) or a new CAA. Operators will have 30 days to apply for a new FMP number (§ 3173.12) or CAA (§ 3173.15), if applicable. The existing FMP number may be used for production reporting until a new FMP number is assigned or CAA is approved. § 3173.21 Combining production downhole in certain circumstances. (a)(1) Combining production from a single well drilled into different hydrocarbon pools or geologic formations ( e.g., (2) If any of the hydrocarbon pools or geologic formations underlie or are common to more than one of the properties, the operator must establish a unit PA (see 43 CFR part 3180) or CA (see 43 CFR 3105.2-1-3105.2-3), as applicable, rather than applying for a CAA. (b) Combining production downhole from different geologic formations on the same lease, unit PA, or CA in a single well requires approval of the AO (see 43 CFR 3162.3-2), but it is not considered commingling for production accounting purposes. § 3173.22 Requirements for off-lease measurement. The BLM will consider granting a request for off-lease measurement if the request: (a) Involves only production from a single lease, unit PA, CA, or CAA; (b) Provides for accurate production accountability; (c) Is in the public interest (considering factors such as BMPs, topographic and environmental conditions that make on-lease measurement physically impractical, and maximum ultimate economic recovery); and (d) Occurs at an approved FMP. A request for approval of an FMP (see § 3173.12) may be filed concurrently with the request for off-lease measurement. § 3173.23 Applying for off-lease measurement. To apply for approval of off-lease measurement, the operator must submit the following to the BLM office having jurisdiction over the leases, units, or communitized areas: (a) A completed Sundry Notice; (b) Justification for off-lease measurement (considering factors such as BMPs, topographic and environmental issues, and maximum ultimate economic recovery); (c) A topographic map or maps of appropriate scale showing the following: (1) The boundary of the lease, unit, unit PA, or communitized area from which the production originates; and (2) The location of existing or planned facilities and the relative location of all wellheads (including the API number for each well) and piping included in the off-lease measurement proposal, and existing FMPs or FMPs proposed to be installed to the extent known or anticipated; (d) The surface ownership of all land on which equipment is, or is proposed to be, located; (e) If any of the proposed off-lease measurement facilities are located on non-federally owned surface, a written concurrence signed by the owner(s) of the surface and the owner(s) of the measurement facilities, including each owner's name, address, and telephone number, granting the BLM unrestricted access to the off-lease measurement facility and the surface on which it is located, for the purpose of inspecting any production, measurement, water handling, or transportation equipment located on the non-Federal surface up to and including the FMP, and for otherwise verifying production accountability. If the ownership of the non-Federal surface or of the measurement facility changes, the operator must obtain and provide to the AO the written concurrence required under this paragraph from the new owner(s) within 30 days of the change in ownership; (f) A right-of-way grant application (Standard Form 299), filed under 43 CFR part 2880, if the proposed off-lease FMP is on a pipeline, or under 43 CFR part 2800, if the proposed off-lease FMP is a meter or storage tank. This requirement applies only when new surface disturbance is proposed for the FMP and its associated facilities are located on BLM-managed land; (g) A right-of-way grant application, filed under 25 CFR part 169 with the appropriate BIA office, if any of the proposed surface facilities are on Indian land outside the lease, unit, or communitized area from which the production originated; (h) Written approval from the appropriate surface-management agency, if new surface disturbance is proposed for the FMP and its associated facilities are located on Federal land managed by an agency other than the BLM; (i) An application for approval of off-lease royalty-free use (if required under applicable rules), if the operator proposes to use production from the lease, unit, or CA as fuel at the off-lease measurement facility without payment of royalty; (j) A statement that indicates whether the proposal includes all, or only a portion of, the production from the lease, unit, or CA. (For example, gas, but not oil, could be proposed for off-lease measurement.) If the proposal includes only a portion of the production, identify the FMP(s) where the remainder of the production from the lease, unit, or CA is measured or is proposed to be measured; and (k) If the operator is applying for an amendment of an existing approval of off-lease measurement, the operator must submit a completed Sundry Notice required under paragraph (a) of this section, and information required under paragraphs (b) through (j) of this section to the extent the information previously submitted has changed. § 3173.24 Effective date of an off-lease measurement approval. If the BLM approves off-lease measurement, the approval is effective on the date that the approval is issued, unless the approval specifies a different effective date. § 3173.25 Existing approved off-lease measurement. (a) Upon receipt of an operator's request for assignment of an FMP number to a facility associated with an off-lease measurement approval existing on January 17, 2017, the AO will review the existing approved off-lease measurement for consistency with the minimum standards and requirements for an off-lease measurement approval under § 3173.22. The AO will notify the operator in writing of any inconsistencies or deficiencies. (b) The operator must correct any inconsistencies or deficiencies that the AO identifies, provide any additional information the AO requests, or request an extension of time from the AO, within 20 business days after receipt of the AO's notice. The extension request must explain the factors that will prevent the operator from complying within 20 days and provide a timeframe under which the operator can comply. (c) The AO may terminate the existing off-lease measurement approval and grant a new off-lease measurement approval with new or amended COAs to make the approval consistent with the requirements for off-lease measurement under § 3173.22 in connection with approving the requested FMP. If the operator appeals the new off-lease measurement approval, the existing off-lease measurement approval will continue in effect during the pendency of the appeal. (d) If the existing off-lease measurement approval does not meet the standards and requirements of § 3173.22 and the operator does not correct the deficiencies, the AO may terminate the existing off-lease measurement approval under § 3173.27 and deny the request for an FMP number for the facility associated with the existing off-lease measurement approval. (e) If the existing off-lease measurement approval under this section is consistent with the requirements under § 3173.22, then that existing off-lease measurement is grandfathered and will be part of its FMP approval. (f) If the BLM grants a new off-lease measurement approval to replace an existing off-lease measurement approval, the new approval is effective on the first day of the month following its approval. § 3173.26 Relationship of off-lease measurement approval to royalty-free use of production. Approval of off-lease measurement does not constitute approval of off-lease royalty-free use of production as fuel in facilities located at an FMP approved under the off-lease measurement approval. § 3173.27 Termination of off-lease measurement approval. (a) The BLM may terminate off-lease measurement approval for any reason, including, but not limited to, the following: (1) Changes in technology, regulation, or BLM policy; or (2) Operator non-compliance with the terms or conditions of approval of the off-lease measurement approval or §§ 3173.22 through 3173.26. (b) The BLM will notify the operator in writing of the effective date of the termination and any inconsistencies or deficiencies with its off-lease measurement approval that serve as the reason(s) for termination. The operator must correct any inconsistencies or deficiencies that the BLM identifies, provide any additional information the AO requests, or request an extension of time from the AO within 20 business days after receipt of the BLM's notice, or the off lease measurement approval terminates on the effective date. (c) The operator may terminate the off-lease measurement by submitting a Sundry Notice to the BLM. The Sundry Notice must identify the new FMP(s) for the lease(s), unit(s), or CA(s) previously subject to the off-lease measurement approval. (d) If off-lease measurement is terminated, each lease, unit PA, or CA that was subject to the off-lease measurement approval may require a new FMP number(s) or a new off-lease measurement approval. Operators will have 30 days to apply for a new FMP number or off-lease measurement approval, whichever is applicable. The existing FMP number may be used for production reporting until a new FMP number is assigned or off-lease measurement is approved. § 3173.28 Instances not constituting off-lease measurement, for which no approval is required. (a) If the approved FMP is located on the well pad of a directionally or horizontally drilled well that produces oil and gas from a lease, unit, or communitized area on which the well pad is not located, measurement at the FMP does not constitute off-lease measurement. However, if the FMP is located off of the well pad, regardless of distance, measurement at the FMP constitutes off-lease measurement, and BLM approval is required under §§ 3173.22 through 3173.26. (b) If a lease, unit, or CA consists of more than one separate tract whose boundaries are not contiguous ( e.g., (1) The production is moved from one tract within the same lease, unit, or communitized area to another area of the lease, unit, or communitized area on which the FMP is located; and (2) Production is not diverted during the movement between the tracts before the FMP, except for production used royalty free. § 3173.29 Immediate assessments for certain violations. Certain instances of noncompliance warrant the imposition of immediate assessments upon discovery, as prescribed in the following table. Imposition of these assessments does not preclude other appropriate enforcement actions: Table 1 to § 3173.29—Violations Subject to an Immediate Assessment Violation Assessment amount per violation 1. An appropriate valve on an oil storage tank was not sealed, as required by § 3173.2 1,000 2. An appropriate valve or component on an oil metering system was not sealed, as required by § 3173.3 1,000 3. A Federal seal is removed without prior approval of the AO or AR, as required by § 3173.4 1,000 4. Oil was not properly measured before removal from storage for use on a different lease, unit, or CA, as required by § 3173.7(b) 1,000 5. An FMP was bypassed, in violation of § 3170.4 1,000 6. Theft or mishandling of production was not reported to the BLM, as required by § 3173.8 1,000 7. Records necessary to determine quantity and quality of production were not retained, as required by § 3170.7 1,000 8. FMP application was not submitted, as required by § 3173.12 1,000 9. (i) For facilities that begin operation after January 17, 2017, BLM approval for off-lease measurement was not obtained before removing production, as required by § 3173.23 1,000 (ii) Facilities that were in operation on or before January 17, 2017, are subject to an assessment if they do not have an existing BLM approval for off-lease measurement. 10. (i) For facilities that begin operation after January 17, 2017, BLM approval for surface commingling was not obtained before removing production, as required by § 3173.15 1,000 (ii) Facilities that were in operation on or before January 17, 2017, are subject to an assessment if they do not have an existing BLM approval for surface commingling. 11. (i) For facilities that begin operation after January 17, 2017, BLM approval for downhole commingling was not obtained before removing production, as required by § 3173.15 1,000 (ii) Facilities that were in operation on or before January 17, 2017, are subject to an assessment if they do not have an existing BLM approval for downhole commingling. Appendix A to Subpart 3173 of Part 3170—Examples of Site Facility Diagrams I. Diagrams 1. Site Facility Diagrams and Sealing of Valve Introduction 2. Diagrams Diagrams Description I-A Gas well without separation equipment. I-B Gas well with separation equipment. I-C Single operator with co-located facilities single oil tank, gas, and water storage. I-D Oil sales with multiple oil tanks, gas, and water storage. I-E Co-located facilities with multiple operators, oil sales by liquid meter (Lease Automatic Custody Transfer or Coriolis Measurement System), gas, and water storage. I-F On-lease gas plant, with oil sales by liquid meter, Liquefied Petroleum Gas (LPG)/Natural Gas Liquids (NGL) sales by liquid meter, inlet gas, tailgate gas, flared or vented and plant process gas used. I-G Enhanced recovery water injection or other water disposal facility. I-H Pod Facility. I-I On-lease with gas measurement after the Joule-Thomson Plant (JT-Skid), oil sales by liquid meter, Liquefied Petroleum Gas (LPG)/Natural Gas Liquids (NGL) sales by liquid meter. I-J On-lease with gas measurement before the Joule-Thomson Plant (JT-Skid) and oil sales by liquid meter. Note: No FMP number required for Liquefied Petroleum Gas (LPG)/Natural Gas Liquids (NGL) liquid meter. 1. Site Facility Diagrams and Sealing of Valves Introduction Introduction Appendix A Subpart 3174—Measurement of Oil Source: 81 FR 81504, Nov. 17, 2016, unless otherwise noted. § 3174.1 Definitions and acronyms. (a) As used in this subpart, the term: Barrel (bbl) Base pressure Base temperature Certificate of calibration Composite meter factor Configuration log Coriolis meter Coriolis measurement system (CMS) Displacement prover Dynamic meter factor Event log Gross standard volume Indicated volume Innage gauging Lease automatic custody transfer (LACT) system Master meter prover Meter factor Net standard volume Outage gauging Positive displacement meter Quantity transaction record (QTR) Tertiary device Transducer Vapor tight (b) As used in this subpart, the following acronyms carry the meaning prescribed: API CA COA CPL CTL NIST PA PMT PSIA S&W § 3174.2 General requirements. (a) Oil may be stored only in tanks that meet the requirements of § 3174.5(b) of this subpart. (b) Oil must be measured on the lease, unit PA, or CA, unless approval for off-lease measurement is obtained under §§ 3173.22 and 3173.23 of this part. (c) Oil produced from a lease, unit PA, or CA may not be commingled with production from other leases, unit PAs, or CAs or non-Federal properties before the point of royalty measurement, unless prior approval is obtained under §§ 3173.14 and 3173.15 of this part. (d) An operator must obtain a BLM-approved FMP number under §§ 3173.12 and 3173.13 of this part for each oil measurement facility where the measurement affects the calculation of the volume or quality of production on which royalty is owed ( i.e., (e) Except as provided in paragraph (h) of this section, all equipment used to measure the volume of oil for royalty purposes installed after January 17, 2017 must comply with the requirements of this subpart. (f) Except as provided in paragraph (h) of this section, measuring procedures and equipment used to measure oil for royalty purposes, that is in use on January 17, 2017, must comply with the requirements of this subpart on or before the date the operator is required to apply for an FMP number under 3173.12(e) of this part. Prior to that date, measuring procedures and equipment used to measure oil for royalty purposes, that is in use on January 17, 2017 must continue to comply with the requirements of Onshore Oil and Gas Order No. 4, Measurement of oil, § 3164.1(b) as contained in 43 CFR part 3160, (revised October 1, 2016), and any COAs and written orders applicable to that equipment. (g) The requirement to follow the approved equipment lists identified in §§ 3174.6(b)(5)(ii)(A), 3174.6(b)(5)(iii), 3174.8(a)(1), and 3174.9(a) does not apply until January 17, 2019. The operator or manufacturer must obtain approval of a particular make, model, and size by submitting the test data used to develop performance specifications to the PMT to review. (h) Meters used for allocation under a commingling and allocation approval under § 3173.14 are not required to meet the requirements of this subpart. § 3174.3 Incorporation by reference (IBR). (a) Certain material specified in this section is incorporated by reference into this part with the approval of the Director of the Federal Register under 5 U.S.C. 552(a) and 1 CFR part 51. Operators must comply with all incorporated standards and material, as they are listed in this section. To enforce any edition other than that specified in this section, the BLM must publish a rule in the Federal Register, http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html (b) American Petroleum Institute (API), 1220 L Street NW., Washington, DC 20005; telephone 202-682-8000; API also offers free, read-only access to some of the material at http://publications.api.org (1) API Manual of Petroleum Measurement Standards (MPMS) Chapter 2—Tank Calibration, Section 2A, Measurement and Calibration of Upright Cylindrical Tanks by the Manual Tank Strapping Method; First Edition, February 1995; Reaffirmed February 2012 (“API 2.2A”), IBR approved for § 3174.5(c). (2) API MPMS Chapter 2—Tank Calibration, Section 2.2B, Calibration of Upright Cylindrical Tanks Using the Optical Reference Line Method; First Edition, March 1989, Reaffirmed January 2013 (“API 2.2B”), IBR approved for § 3174.5(c). (3) API MPMS Chapter 2—Tank Calibration, Section 2C, Calibration of Upright Cylindrical Tanks Using the Optical-triangulation Method; First Edition, January 2002; Reaffirmed May 2008 (“API 2.2C”), IBR approved for § 3174.5(c). (4) API MPMS Chapter 3, Section 1A, Standard Practice for the Manual Gauging of Petroleum and Petroleum Products; Third Edition, August 2013 (“API 3.1A”), IBR approved for §§ 3174.5(b), 3174.6(b). (5) API MPMS Chapter 3—Tank Gauging, Section 1B, Standard Practice for Level Measurement of Liquid Hydrocarbons in Stationary Tanks by Automatic Tank Gauging; Second Edition, June 2001; Reaffirmed August 2011 (“API 3.1B”), IBR approved for § 3174.6(b). (6) API MPMS Chapter 3—Tank Gauging, Section 6, Measurement of Liquid Hydrocarbons by Hybrid Tank Measurement Systems; First Edition, February 2001; Errata September 2005; Reaffirmed October 2011 (“API 3.6”), IBR approved for § 3174.6(b). (7) API MPMS Chapter 4—Proving Systems, Section 1, Introduction; Third Edition, February 2005; Reaffirmed June 2014 (“API 4.1”), IBR approved for § 3174.11(c). (8) API MPMS Chapter 4—Proving Systems, Section 2, Displacement Provers; Third Edition, September 2003; Reaffirmed March 2011, Addendum February 2015 (“API 4.2”), IBR approved for §§ 3174.11(b) and (c). (9) API MPMS Chapter 4, Section 5, Master-Meter Provers; Fourth Edition, June 2016, (“API 4.5”), IBR approved for § 3174.11(b). (10) API MPMS Chapter 4—Proving Systems, Section 6, Pulse Interpolation; Second Edition, May 1999; Errata April 2007; Reaffirmed October 2013 (“API 4.6”), IBR approved for § 3174.11(c). (11) API MPMS Chapter 4, Section 8, Operation of Proving Systems; Second Edition, September 2013 (“API 4.8”), IBR approved for § 3174.11(b). (12) API MPMS Chapter 4—Proving Systems, Section 9, Methods of Calibration for Displacement and Volumetric Tank Provers, Part 2, Determination of the Volume of Displacement and Tank Provers by the Waterdraw Method of Calibration; First Edition, December 2005; Reaffirmed July 2015 (“API 4.9.2”), IBR approved for § 3174.11(b). (13) API MPMS Chapter 5—Metering, Section 6, Measurement of Liquid Hydrocarbons by Coriolis Meters; First Edition, October 2002; Reaffirmed November 2013 (“API 5.6”), IBR approved for §§ 3174.9(e), 3174.11(h) and (i). (14) API MPMS Chapter 6—Metering Assemblies, Section 1, Lease Automatic Custody Transfer (LACT) Systems; Second Edition, May 1991; Reaffirmed May 2012 (“API 6.1”), IBR approved for § 3174.8(a) and (b). (15) API MPMS Chapter 7, Temperature Determination; First Edition, June 2001, Reaffirmed February 2012 (“API 7”), IBR approved for §§ 3174.6(b), 3174.8(b). (16) API MPMS Chapter 7.3, Temperature Determination—Fixed Automatic Tank Temperature Systems; Second Edition, October 2011 (“API 7.3”), IBR approved for § 3174.6(b). (17) API MPMS Chapter 8, Section 1, Standard Practice for Manual Sampling of Petroleum and Petroleum Products; Fourth Edition, October 2013 (“API 8.1”), IBR approved for §§ 3174.6(b), 3174.11(h). (18) API MPMS Chapter 8, Section 2, Standard Practice for Automatic Sampling of Petroleum and Petroleum Products; Third Edition, October 2015 (“API 8.2”), IBR approved for §§ 3174.6(b), 3174.8(b), 3174.11(h). (19) API MPMS Chapter 8—Sampling, Section 3, Standard Practice for Mixing and Handling of Liquid Samples of Petroleum and Petroleum Products; First Edition, October 1995; Errata March 1996; Reaffirmed, March 2010 (“API 8.3”), IBR approved for §§ 3174.8(b), 3174.11(h). (20) API MPMS Chapter 9, Section 1, Standard Test Method for Density, Relative Density, or API Gravity of Crude Petroleum and Liquid Petroleum Products by Hydrometer Method; Third Edition, December 2012 (“API 9.1”), IBR approved for §§ 3174.6(b), 3174.8(b). (21) API MPMS Chapter 9, Section 2, Standard Test Method for Density or Relative Density of Light Hydrocarbons by Pressure Hydrometer; Third Edition, December 2012 (“API 9.2”), IBR approved for §§ 3174.6(b), 3174.8(b). (22) API MPMS Chapter 9, Section 3, Standard Test Method for Density, Relative Density, and API Gravity of Crude Petroleum and Liquid Petroleum Products by Thermohydrometer Method; Third Edition, December 2012 (“API 9.3”), IBR approved for §§ 3174.6(b), 3174.8(b). (23) API MPMS Chapter 10, Section 4, Determination of Water and/or Sediment in Crude Oil by the Centrifuge Method (Field Procedure); Fourth Edition, October 2013; Errata March 2015 (“API 10.4”), IBR approved for §§ 3174.6(b), 3174.8(b). (24) API MPMS Chapter 11—Physical Properties Data, Section 1, Temperature and Pressure Volume Correction Factors for Generalized Crude Oils, Refined Products and Lubricating Oils; May 2004, Addendum 1 September 2007; Reaffirmed August 2012 (“API 11.1”), IBR approved for §§ 3174.9(f), 3174.12(a). (25) API MPMS Chapter 12—Calculation of Petroleum Quantities, Section 2, Calculation of Petroleum Quantities Using Dynamic Measurement Methods and Volumetric Correction Factors, Part 1, Introduction; Second Edition, May 1995; Reaffirmed March 2014 (“API 12.2.1”), IBR approved for §§ 3174.8(b), 3174.9(g). (26) API MPMS Chapter 12—Calculation of Petroleum Quantities, Section 2, Calculation of Petroleum Quantities Using Dynamic Measurement Methods and Volumetric Correction Factors, Part 2, Measurement Tickets; Third Edition, June 2003; Reaffirmed September 2010 (“API 12.2.2”), IBR approved for §§ 3174.8(b), 3174.9(g). (27) API MPMS Chapter 12—Calculation of Petroleum Quantities, Section 2, Calculation of Petroleum Quantities Using Dynamic Measurement Methods and Volumetric Correction Factors, Part 3, Proving Report; First Edition, October 1998; Reaffirmed March 2009 (“API 12.2.3”), IBR approved for § 3174.11(c) and (i). (28) API MPMS Chapter 12—Calculation of Petroleum Quantities, Section 2, Calculation of Petroleum Quantities Using Dynamic Measurement Methods and Volumetric Correction Factors, Part 4, Calculation of Base Prover Volumes by the Waterdraw Method; First Edition, December 1997; Reaffirmed March 2009; Errata July 2009 (“API 12.2.4”), IBR approved for § 3174.11(b). (29) API MPMS Chapter 13—Statistical Aspects of Measuring and Sampling, Section 1, Statistical Concepts and Procedures in Measurements; First Edition, June 1985 Reaffirmed February 2011; Errata July 2013 (“API 13.1”), IBR approved for § 3174.4(a). (30) API MPMS Chapter 13, Section 3, Measurement Uncertainty; First Edition, May, 2016 (“API 13.3”), IBR approved for § 3174.4(a). (31) API MPMS Chapter 14, Section 3, Orifice Metering of Natural Gas and Other Related Hydrocarbon Fluids—Concentric, Square-edged Orifice Meters, Part 1, General Equations and Uncertainty Guidelines; Fourth Edition, September 2012; Errata July 2013 (“API 14.3.1”), IBR approved for § 3174.4(a). (32) API MPMS Chapter 18—Custody Transfer, Section 1, Measurement Procedures for Crude Oil Gathered From Small Tanks by Truck; Second Edition, April 1997; Reaffirmed February 2012 (“API 18.1”), IBR approved for § 3174.6(b). (33) API MPMS Chapter 18, Section 2, Custody Transfer of Crude Oil from Lease Tanks Using Alternative Measurement Methods, First Edition, July 2016 (“API 18.2”), IBR approved for § 3174.6(b). (34) API MPMS Chapter 21—Flow Measurement Using Electronic Metering Systems, Section 2, Electronic Liquid Volume Measurement Using Positive Displacement and Turbine Meters; First Edition, June 1998; Reaffirmed August 2011 (“API 21.2”), IBR approved for §§ 3174.8(b), 3174.9(f), 3174.10(f). (35) API Recommended Practice (RP) 12R1, Setting, Maintenance, Inspection, Operation and Repair of Tanks in Production Service; Fifth Edition, August 1997; Reaffirmed April 2008 (“API RP 12R1”), IBR approved for § 3174.5(b). (36) API RP 2556, Correction Gauge Tables For Incrustation; Second Edition, August 1993; Reaffirmed November 2013 (“API RP 2556”), IBR approved for § 3174.5(c). Note 1 to § 3174.3( b You may also be able to purchase these standards from the following resellers: Techstreet, 3916 Ranchero Drive, Ann Arbor, MI 48108; telephone 734-780-8000; www.techstreet.com/api/apigate.html www.ihs.com http://infostore.saiglobal.com/store/ § 3174.4 Specific measurement performance requirements. (a) Volume measurement uncertainty levels. Table 1 to § 3174.4—Volume Measurement Uncertainty Levels If the averaging period The overall 1. Greater than or equal to 30,000 bbl/month ±0.50 percent. 2. Less than 30,000 bbl/month ±1.50 percent. (2) Only a BLM State Director may grant an exception to the uncertainty levels prescribed in paragraph (a)(1) of this section, and only upon: (i) A showing that meeting the required uncertainly level would involve extraordinary cost or unacceptable adverse environmental effects; and (ii) Written concurrence of the PMT, prepared in coordination with the Deputy Director. (b) Bias. (c) Verifiability. (d) Alternative equipment. § 3174.5 Oil measurement by tank gauging—general requirements. (a) Measurement objective. (b) Oil tank equipment. (2) Each oil storage tank must be connected, maintained, and operated in compliance with §§ 3173.2, 3173.6, and 3173.7 of this part. (3) All oil storage tanks, hatches, connections, and other access points must be vapor tight. Unless connected to a vapor recovery or flare system, all tanks must have a pressure-vacuum relief valve installed at the highest point in the vent line or connection with another tank. All hatches, connections, and other access points must be installed and maintained in accordance with manufacturers' specifications. (4) All oil storage tanks must be clearly identified and have an operator-generated number unique to the lease, unit PA, or CA, stenciled on the tank and maintained in a legible condition. (5) Each oil storage tank associated with an approved FMP that has a tank-gauging system must be set and maintained level. (6) Each oil storage tank associated with an approved FMP that has a tank-gauging system must be equipped with a distinct gauging reference point, consistent with API 3.1A (incorporated by reference, see § 3174.3). The height of the reference point must be stamped on a fixed bench-mark plate or stenciled on the tank near the gauging hatch, and be maintained in a legible condition. (c) Sales tank calibrations. (1) Determine sales tank capacities by tank calibration using actual tank measurements; (i) The unit volume must be in barrels (bbl); and (ii) The incremental height measurement must match gauging increments specified in § 3174.6(b)(5)(i)(C); (2) Recalibrate a sales tank if it is relocated or repaired, or the capacity is changed as a result of denting, damage, installation, removal of interior components, or other alterations; and (3) Submit sales tank calibration charts (tank tables) to the AO within 45 days after calibration. Tank tables may be in paper or electronic format. § 3174.6 Oil measurement by tank gauging—procedures. (a) The procedures for oil measurement by tank gauging must comply with the requirements outlined in this section. (b) The operator must follow the procedures identified in API 18.1 or API 18.2 (both incorporated by reference, see § 3174.3) as further specified in this paragraph to determine the quality and quantity of oil measured under field conditions at an FMP. (1) Isolate tank. (2) Determine opening oil temperature. (i) Glass thermometers must be clean, be free of fluid separation, have a minimum graduation of 1.0 °F, and have an accuracy of ±0.5 °F. (ii) Electronic thermometers must have a minimum graduation of 0.1 °F and have an accuracy of ±0.5 °F. (iii) Record the temperature to the nearest 1.0 °F for glass thermometers or 0.1 °F for portable electronic thermometers. (3) Take oil samples. (4) Determine observed oil gravity. (i) The hydrometer or thermohydrometer (as applicable) must be calibrated for an oil gravity range that includes the observed gravity of the oil sample being tested and must be clean, with a clearly legible oil gravity scale and with no loose shot weights. (ii) Allow the temperature to stabilize for at least 5 minutes prior to reading the thermometer. (iii) Read and record the observed API oil gravity to the nearest 0.1 degree. Read and record the temperature reading to the nearest 1.0 °F. (5) Measure the opening tank fluid level. (i) For manual gauging, comply with the requirements of API 3.1A and API 18.1 (both incorporated by reference, see § 3174.3) and the following: (A) The proper bob must be used for the particular measurement method, i.e., (B) A gauging tape must be used. The gauging tape must be made of steel or corrosion-resistant material with graduation clearly legible, and must not be kinked or spliced; (C) Either obtain two consecutive identical gauging measurements for any tank regardless of size, or: ( 1 1/4 ( 2 1/8 1/8 (D) A suitable product-indicating paste may be used on the tape to facilitate the reading. The use of chalk or talcum powder is prohibited; and (E) The same tape and bob must be used for both opening and closing gauges. (ii) For automatic tank gauging (ATG), comply with the requirements of API 3.1B, API 3.6, and API 18.2 (all incorporated by reference, see § 3174.3) and the following: (A) The specific makes and models of ATG that are identified and described at www.blm.gov (B) The ATG must be inspected and its accuracy verified to within ± 1/4 (C) A log of field verifications must be maintained and available upon request. The log must include the following information: The date of verification; the as-found manual gauge readings; the as-found ATG readings; and whether the ATG was field calibrated. If the ATG was field calibrated, the as-left manual gauge readings and as-left ATG readings must be recorded. (iii) For dynamic volume determination under API 18.2, Subsection 10.1.1, (incorporated by reference, see § 3174.3), the specific makes and models of in-line meters that are identified and described at www.blm.gov (6) Determine S&W content. (7) Transfer oil. (8) Determine closing oil temperature. (9) Take closing gauge. (10) Complete measurement ticket. § 3174.7 LACT system—general requirements. (a) A LACT system must meet the construction and operation requirements and minimum standards of this section, § 3174.8, and § 3174.4. (b) A LACT system must be proven as prescribed in § 3174.11 of this subpart. (c) Measurement tickets must be completed under § 3174.12(b) of this subpart. (d) All components of a LACT system must be accessible for inspection by the AO. (e)(1) The operator must notify the AO, within 72 hours after discovery, of any LACT system failures or equipment malfunctions that may have resulted in measurement error. (2) Such system failures or equipment malfunctions include, but are not limited to, electrical, meter, and other failures that affect oil measurement. (f) Any tests conducted on oil samples extracted from LACT system samplers for determination of temperature, oil gravity, and S&W content must meet the requirements and minimum standards in § 3174.6(b)(2), (4), and (6) of this subpart. (g) Automatic temperature compensators and automatic temperature and gravity compensators are prohibited. § 3174.8 LACT system—components and operating requirements. (a) LACT system components. (1) The custody transfer meter must be a positive displacement meter or a Coriolis meter. The specific make, models, and sizes of positive displacement or Coriolis meter and associated software that are identified and described at www.blm.gov (2) An electronic temperature averaging device must be installed. (3) Meter back pressure must be applied by a back pressure valve or other controllable means of applying back pressure to ensure single-phase flow. (b) LACT system operating requirements. (1) Sampling must be conducted according to API 8.2 and API 8.3 (both incorporated by reference, see § 3174.3) and the following: (i) The sample extractor probe must be inserted within the center half of the flowing stream; (ii) The extractor probe must be horizontally oriented; and (iii) The external body of the extractor probe must be marked with the direction of the flow. (2) Any tests conducted on oil samples extracted from LACT system samplers for determination of oil gravity and S&W content must meet the requirements of either API 9.1, API 9.2, or API 9.3, and API 10.4 (all incorporated by reference, see § 3174.3). (3) The composite sample container must be emptied and cleaned upon completion of sample withdrawal. (4) The positive displacement or Coriolis meter (see § 3174.10) must be equipped with a non-resettable totalizer. The meter must include or allow for the attachment of a device that generates at least 8,400 pulses per barrel of registered volume. (5) The system must have a pressure-indicating device downstream of the meter, but upstream of meter-proving connections. The pressure-indicating device must be capable of providing pressure data to calculate the CPL correction factor. (6) An electronic temperature averaging device must be installed, operated, and maintained as follows: (i) The temperature sensor must be placed in compliance with API 7 (incorporated by reference, see § 3174.3); (ii) The electronic temperature averaging device must be volume-weighted and take a temperature reading following API 21.2, Subsection 9.2.8 (incorporated by reference, see § 3174.3); (iii) The average temperature for the measurement ticket must be calculated by the volumetric averaging method using API 21.2, Subsection 9.2.13.2a (incorporated by reference, see § 3174.3); (iv) The temperature averaging device must have a reference accuracy of ±0.5 °F or better, and have a minimum graduation of 0.1 °F; and (v) The temperature averaging device must include a display of instantaneous temperature and the average temperature calculated since the measurement ticket was opened. (vi) The average temperature calculated since the measurement ticket was opened must be used to calculate the CTL correction factor. (7) Determination of net standard volume: Calculate the net standard volume at the close of each measurement ticket following the guidelines in API 12.2.1 and API 12.2.2 (both incorporated by reference, see § 3174.3). § 3174.9 Coriolis measurement systems (CMS)—general requirements and components. The following Coriolis measurement systems section is intended for Coriolis measurement applications independent of LACT measurement systems. (a) A CMS must meet the requirements and minimum standards of this section, § 3174.4, and § 3174.10. (b) The specific makes, models, and sizes of Coriolis meters and associated software that have been reviewed by the PMT, as provided in § 3174.13, approved by the BLM, and identified and described at www.blm.gov (c) A CMS system must be proven at the frequency and under the requirements of § 3174.11 of this subpart. (d) Measurement tickets must be completed under § 3174.12(b) of this subpart. (e) A CMS at an FMP must be installed with the components listed in API 5.6 (incorporated by reference, see § 3174.3). Additional requirements are as follows: (1) The pressure transducer must meet the requirements of § 3174.8(b)(5) of this subpart. (2) Temperature determination must meet the requirements of § 3174.8(b)(6) of this subpart. (3) If nonzero S&W content is to be used in determining net oil volume, the sampling system must meet the requirements of § 3174.8(b)(1) through (3) of this subpart. If no sampling system is used, or the sampling system does not meet the requirements of § 3174.8(b)(1) through (3) of this subpart, the S&W content must be reported as zero; (4) Sufficient back pressure must be applied to ensure single phase flow through the meter. (f) Determination of API oil gravity. (1) Determined from a composite sample taken pursuant to § 3174.8(b)(1) through (3) of this subpart; or (2) Calculated from the average density as measured by the CMS over the measurement ticket period under API 21.2, Subsection 9.2.13.2a (incorporated by reference, see § 3174.3). Density must be corrected to base temperature and pressure using API 11.1 (incorporated by reference, see § 3174.3). (g) Determination of net standard volume. § 3174.10 Coriolis meter for LACT and CMS measurement applications—operating requirements. (a) Minimum electronic pulse level. (b) Meter specifications. (i) The reference accuracy for both mass flow rate and density, stated in either percent of reading, percent of full scale, or units of measure; (ii) The effect of changes in temperature and pressure on both mass flow and fluid density readings, and the effect of flow rate on density readings. These specifications must be stated in percent of reading, percent of full scale, or units of measure over a stated amount of change in temperature, pressure, or flow rate ( e.g., (iii) The stability of the zero reading for volumetric flow rate. The specifications must be stated in percent of reading, percent of full scale, or units of measure; (iv) Design limits for flow rate and pressure; and (v) Pressure drop through the meter as a function of flow rate and fluid viscosity. (2) Submission of meter specifications: The operator must submit Coriolis meter specifications to the BLM upon request. (c) Non-resettable totalizer. (d) Verification of meter zero value using the manufacturer's specifications. (e) Required on-site information. (2) For each Coriolis meter, the following values and corresponding units of measurement must be displayed: (i) The instantaneous density of liquid (pounds/bbl, pounds/gal, or degrees API); (ii) The instantaneous indicated volumetric flow rate through the meter (bbl/day); (iii) The meter factor; (iv) The instantaneous pressure (psi); (v) The instantaneous temperature ( °F); (vi) The cumulative gross standard volume through the meter (non-resettable totalizer) (bbl); and (vii) The previous day's gross standard volume through the meter (bbl). (3) The following information must be correct, be maintained in a legible condition, and be accessible to the AO at the FMP without the use of data collection equipment, laptop computers, or any special equipment: (i) The make, model, and size of each sensor; and (ii) The make, range, calibrated span, and model of the pressure and temperature transducer used to determine gross standard volume. (4) A log must be maintained of all meter factors, zero verifications, and zero adjustments. For zero adjustments, the log must include the zero value before adjustment and the zero value after adjustment. The log must be made available upon request. (f) Audit trail requirements. (1) Quantity transaction record (QTR). (2) Configuration log. (3) Event log. (4) Alarm log (i) Density deviations from acceptable parameters; and (ii) Instances in which the flow rate exceeded the manufacturer's maximum recommended flow rate or was below the manufacturer's minimum recommended flow rate. (g) Data protection. § 3174.11 Meter-proving requirements. (a) Applicability. (b) Meter prover. (1) Master meters must have a meter factor within 0.9900 to 1.0100 determined by a minimum of five consecutive prover runs within 0.0005 (0.05 percent repeatability) as described in API 4.5, Subsection 6.5 (incorporated by reference, see § 3174.3). The master meter must not be mechanically compensated for oil gravity or temperature; its readout must indicate units of volume without corrections. The meter factor must be documented on the calibration certificate and must be calibrated at least once every 12 months. New master meters must be calibrated immediately and recalibrated in three months. Master meters that have undergone mechanical repairs, alterations, or changes that affect the calibration must be calibrated immediately upon completion of this work and calibrated again 3 months after this date under API 4.5, API 4.8, Subsection 10.2, and API 4.8, Annex B (all incorporated by reference, see § 3174.3). (2) Displacement provers must meet the requirements of API 4.2 (incorporated by reference, see § 3174.3) and be calibrated using the water-draw method under API 4.9.2 (incorporated by reference, see § 3174.3), at the calibration frequencies specified in API 4.8, Subsection 10.1(b) (incorporated by reference, see § 3174.3). (3) The base prover volume of a displacement prover must be calculated under API 12.2.4 (incorporated by reference, see § 3174.3). (4) Displacement provers must be sized to obtain a displacer velocity through the prover that is within the appropriate range during proving under API 4.2, Subsection 4.3.4.2, Minimum Displacer Velocities and API 4.2, Subsection 4.3.4.1, Maximum Displacer Velocities (incorporated by reference, see § 3174.3). (5) Fluid velocity is calculated using API 4.2, Subsection 4.3.4.3, Equation 12 (incorporated by reference, see § 3174.3). (c) Meter proving runs. (1) Meter proving must be performed under normal operating fluid pressure, fluid temperature, and fluid type and composition, as follows: (i) The oil flow rate through the LACT or CMS during proving must be within 10 percent of the normal flow rate; (ii) The absolute pressure as measured by the LACT or CMS during proving must be within 10 percent of the normal operating absolute pressure; (iii) The temperature as measured by the LACT or CMS during the proving must be within 10 °F of the normal operating temperature; and (iv) The gravity of the oil during proving must be within 5° API of the normal oil gravity. (v) If the normal flow rate, pressure, temperature, or oil gravity vary by more than the limits defined in paragraphs (c)(i) through (c)(iv) of this section, meter provings must be conducted, at a minimum, under the three following conditions: At the lower limit of normal operating conditions, at the upper limit of normal operation conditions, and at the midpoint of normal operating conditions. (2) If each proving run is not of sufficient volume to generate at least 10,000 pulses, as specified by API 4.2, Subsection 4.3.2 (incorporated by reference, see § 3174.3), from the positive displacement meter or the Coriolis meter, then pulse interpolation must be used in accordance with API 4.6 (incorporated by reference, see § 3174.3). (3) Proving runs must be made until the calculated meter factor or meter generated pulses from five consecutive runs match within a tolerance of 0.0005 (0.05 percent) between the highest and the lowest value in accordance with API 12.2.3, Subsection 9 (incorporated by reference, see § 3174.3). (4) The new meter factor is the arithmetic average of the meter generated pulses or intermediate meter factors calculated from the five consecutive runs in accordance with API 12.2.3, Subsection 9 (incorporated by reference, see § 3174.3). (5) Meter factor computations must follow the sequence described in API 12.2.3 (incorporated by reference, see § 3174.3). (6) If multiple meters factors are determined over a range of normal operating conditions, then: (i) If all the meter factors determined over a range of conditions fall within 0.0020 of each other, then a single meter factor may be calculated for that range as the arithmetic average of all the meter factors within that range. The full range of normal operating conditions may be divided into segments such that all the meter factors within each segment fall within a range of 0.0020. In this case, a single meter factor for each segment may be calculated as the arithmetic average of the meter factors within that segment; or (ii) The metering system may apply a dynamic meter factor derived (using, e.g., (7) The meter factor must be at least 0.9900 and no more than 1.0100. (8) The initial meter factor for a new or repaired meter must be at least 0.9950 and no more than 1.0050. (9) For positive displacement meters, the back pressure valve may be adjusted after proving only within the normal operating fluid flow rate and fluid pressure as described in paragraph (c)(1) of this section. If the back pressure valve is adjusted after proving, the operator must document the as left fluid flow rate and fluid pressure on the proving report. (10) If a composite meter factor is calculated, the CPL value must be calculated from the pressure setting of the back pressure valve or the normal operating pressure at the meter. Composite meter factors must not be used with a Coriolis meter. (d) Minimum proving frequency. (1) Initial meter installation; (2) Every 3 months (quarterly) after the last proving, or each time the registered volume flowing through the meter, as measured on the non-resettable totalizer from the last proving, increases by 75,000 bbl, whichever comes first, but no more frequently than monthly; (3) Meter zeroing (Coriolis meter); (4) Modification of mounting conditions; (5) A change in fluid temperature that exceeds the transducer's calibrated span; (6) A change in pressure, density, or flow rate that exceeds the operating proving limits; (7) The mechanical or electrical components of the meter have been changed, repaired, or removed; (8) Internal calibration factors have been changed or reprogrammed; or (9) At the request of the AO. (e) Excessive meter factor deviation. (2) The arithmetic average of the two successive meter factors must be applied to the production measured through the meter between the date of the previous meter proving and the date of the most recent meter proving. (3) The proving report submitted under paragraph (i) of this section must clearly show the most recent meter factor and describe all subsequent repairs and adjustments. (f) Verification of the temperature transducer. (1) The temperature averager or temperature transducer must be compared with a test thermometer traceable to NIST and with a stated accuracy of ±0.25 °F or better. (2) The temperature reading displayed on the temperature averager or temperature transducer must be compared with the reading of the test thermometer using one of the following methods: (i) The test thermometer must be placed in a test thermometer well located not more than 12″ from the probe of the temperature averager or temperature transducer; or (ii) Both the test thermometer and probe of the temperature averager or temperature transducer must be placed in an insulated water bath. The water bath temperature must be within 20 °F of the normal flowing temperature of the oil. (3) The displayed reading of instantaneous temperature from the temperature averager or the temperature transducer must be compared with the reading from the test thermometer. If they differ by more than 0.5 °F, then the difference in temperatures must be noted on the meter proving report and: (i) The temperature averager or temperature transducer must be adjusted to match the reading of the test thermometer; or (ii) The temperature averager or temperature transducer must be recalibrated, repaired, or replaced. (g) Verification of the pressure transducer (if applicable). (2) The pressure reading displayed on the pressure transducer must be compared with the reading of the test pressure device. (3) The pressure transducer must be tested at the following three points: (i) Zero (atmospheric pressure); (ii) 100 percent of the calibrated span of the pressure transducer; and (iii) A point that represents the normal flowing pressure through the Coriolis meter. (4) If the pressure applied by the test pressure device and the pressure displayed on the pressure transducer vary by more than the required accuracy of the pressure transducer, the pressure transducer must be adjusted to read within the stated accuracy of the test pressure device. (h) Density verification (if applicable). (i) Meter proving reporting requirements. (2) In addition to the information required under paragraph (i)(1) of this section, each meter-proving report must also show the: (i) Unique meter ID number; (ii) Lease number, CA number, or unit PA number; (iii) The temperature from the test thermometer and the temperature from the temperature averager or temperature transducer; (iv) For pressure transducers, the pressure applied by the pressure test device and the pressure reading from the pressure transducer at the three points required under paragraph (g)(3) of this section; (v) For density verification (if applicable), the instantaneous flowing density (as determined by Coriolis meter), and the independent density measurement, as compared under paragraph (h) of this section; and (vi) The “as left” fluid flow rate and fluid pressure, if the back pressure valve is adjusted after proving as described in paragraph (c)(9) of this section. (3) The operator must submit the meter-proving report to the AO no later than 14 days after the meter proving. The proving report may be either in a hard copy or electronic format. § 3174.12 Measurement tickets. (a) Tank gauging. (1) Lease, unit PA, or CA number; (2) Unique tank number and nominal tank capacity; (3) Opening and closing dates and times; (4) Opening and closing gauges and observed temperatures in °F; (5) Observed volume for opening and closing gauge, using tank specific calibration charts (see § 3174.5(c)); (6) Total gross standard volume removed from the tank following API 11.1 (incorporated by reference, see § 3174.3); (7) Observed API oil gravity and temperature in °F; (8) API oil gravity at 60 °F, following API 11.1 (incorporated by reference, see § 3174.3); (9) S&W content percent; (10) Unique number of each seal removed and installed; (11) Name of the individual performing the tank gauging; and (12) Name of the operator. (b) LACT system and CMS. (i) Lease, unit PA, or CA number; (ii) Unique meter ID number; (iii) Opening and closing dates; (iv) Opening and closing totalizer readings of the indicated volume; (v) Meter factor, indicating if it is a composite meter factor; (vi) Total gross standard volume removed through the LACT system or CMS; (vii) API oil gravity. For API oil gravity determined from a composite sample, the observed API oil gravity and temperature must be indicated in °F and the API oil gravity must be indicated at 60 °F. For API oil gravity determined from average density (CMS only), the average uncorrected density must be determined by the CMS; (viii) The average temperature in °F; (ix) The average flowing pressure in psig; (x) S&W content percent; (xi) Unique number of each seal removed and installed; (xii) Name of the purchaser's representative; and (xiii) Name of the operator. (2) Any accumulators used in the determination of average pressure, average temperature, and average density must be reset to zero whenever a new measurement ticket is opened. § 3174.13 Oil measurement by other methods. (a) Any method of oil measurement other than tank gauging, LACT system, or CMS at an FMP requires prior BLM approval. (b)(1) Any operator requesting approval to use alternate oil measurement equipment or measurement method must submit to the BLM performance data, actual field test results, laboratory test data, or any other supporting data or evidence that demonstrates that the proposed alternate oil equipment or method would meet or exceed the objectives of the applicable minimum requirements of this subpart and would not affect royalty income or production accountability. (2) The PMT will review the submitted data to ensure that the alternate oil measurement equipment or method meets the requirements of this subpart and will make a recommendation to the BLM to approve use of the equipment or method, disapprove use of the equipment or method, or approve use of the equipment or method with conditions for its use. If the PMT recommends, and the BLM approves new equipment or methods, the BLM will post the make, model, range or software version (as applicable), or method on the BLM Web site www.blm.gov (c) The procedures for requesting and granting a variance under § 3170.6 of this part may not be used as an avenue for approving new technology, methods, or equipment. Approval of alternative oil measurement equipment or methods may be obtained only under this section. § 3174.14 Determination of oil volumes by methods other than measurement. (a) Under 43 CFR 3162.7-2, when production cannot be measured due to spillage or leakage, the amount of production must be determined by using any method the AO approves or prescribes. This category of production includes, but is not limited to, oil that is classified as slop oil or waste oil. (b) No oil may be classified or disposed of as waste oil unless the operator can demonstrate to the satisfaction of the AO that it is not economically feasible to put the oil into marketable condition. (c) The operator may not sell or otherwise dispose of slop oil without prior written approval from the AO. Following the sale or disposal of slop oil, the operator must notify the AO in writing of the volume sold or disposed of and the method used to compute the volume. § 3174.15 Immediate assessments. Certain instances of noncompliance warrant the imposition of immediate assessments upon the BLM's discovery of the violation, as prescribed in the following table. Imposition of any of these assessments does not preclude other appropriate enforcement actions. Table 1 to § 3174.15—Violations Subject to an Immediate Assessment Violations subject to an immediate assessment Violation: Assessment 1. Missing or nonfunctioning FMP LACT system components as required by § 3174.8 of this subpart $1,000 2. Failure to notify the AO within 72 hours, as required by § 3174.7(e) of this subpart, of any FMP LACT system failure or equipment malfunction resulting in use of an unapproved alternate method of measurement 1,000 3. Missing or nonfunctioning FMP CMS components as required by § 3174.9 of this subpart 1,000 4. Failure to meet the proving frequency requirements for an FMP, detailed in § 3174.11 of this subpart 1,000 5. Failure to obtain a written approval, as required by § 3174.13 of this subpart, before using any oil measurement method other than tank gauging, LACT system, or CMS at a FMP 1,000 Subpart 3175—Measurement of Gas Source: 81 FR 81609, Nov. 17, 2016, unless otherwise noted. § 3175.10 Definitions and acronyms. (a) As used in this subpart, the term: AGA Report No. (followed by a number) Area ratio r d D As-found As-left Atmospheric pressure Beta ratio Bias British thermal unit (Btu) Component-type electronic gas measurement system Configuration log Discharge coefficient Effective date of a spot or composite gas sample Electronic gas measurement (EGM) Element range Event log GPA (followed by a number) Heating value Heating value variability Where: V 95 % σ HV 2.776 = the “student-t” function for a probability of 0.05 and 4 degrees of freedom (degree of freedom is the number of samples minus 1) HV High-volume facility measurement point or high-volume FMP Hydrocarbon dew point Integration Live input variable Low-volume facility measurement point or low-volume FMP Lower calibrated limit Mean Mole percent Normal flowing point Primary device Qualified test facility Quantity transaction record (QTR) Reynolds number Where: R e V = velocity ρ = fluid density D = inside meter tube diameter µ = fluid viscosity Redundancy verification Secondary device Self-contained EGM system Senior fitting Standard cubic foot (scf) Standard deviation Tertiary device Threshold of significance Where: T s U a U b Transducer Turndown Type test Uncertainty Upper calibrated limit Upper range limit (URL) Verification Very-low-volume facility measurement point or very-low-volume FMP Very-high-volume facility measurement point or very-high-volume FMP (b) As used in this subpart the following additional acronyms carry the meaning prescribed: GARVS GC GPA Mcf psia psig § 3175.20 General requirements. Measurement of all gas at an FMP must comply with the standards prescribed in this subpart, except as otherwise approved under § 3170.6 of this part. § 3175.30 Incorporation by reference. (a) Certain material identified in this section is incorporated by reference into this part with the approval of the Director of the Federal Register under 5 U.S.C. 552(a) and 1 CFR part 51. Operators must comply with all incorporated standards and material as they are listed in this section. To enforce any edition other than that specified in this section, the BLM must publish a rule in the Federal Register http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html. (b) American Gas Association (AGA), 400 North Capitol Street NW., Suite 450, Washington, DC 20001; telephone 202-824-7000. (1) AGA Report No. 3, Orifice Metering of Natural Gas and Other Related Hydrocarbon Fluids, Second Edition, September, 1985 (“AGA Report No. 3 (1985)”), IBR approved for §§ 3175.61(a) and (b), 3175.80(k), and 3175.94(a). (2) AGA Transmission Measurement Committee Report No. 8, Compressibility Factors of Natural Gas and Other Related Hydrocarbon Gases; Second Edition, November 1992 (“AGA Report No. 8”), IBR approved for §§ 3175.103(a) and 3175.120(d). (c) American Petroleum Institute (API), 1220 L Street NW., Washington, DC 20005; telephone 202-682-8000. API also offers free, read-only access to some of the material at http://publications.api.org. (1) API Manual of Petroleum Measurement Standards (MPMS) Chapter 14—Natural Gas Fluids Measurement, Section 1, Collecting and Handling of Natural Gas Samples for Custody Transfer; Seventh Edition, May 2016 (“API 14.1”), IBR approved for §§ 3175.112(b) and (c), 3175.113(c), and 3175.114(b). (2) API MPMS, Chapter 14, Section 3, Orifice Metering of Natural Gas and Other Related Hydrocarbon Fluids—Concentric, Square-edged Orifice Meters, Part 1, General Equations and Uncertainty Guidelines; Fourth Edition, September 2012; Errata, July 2013 (“API 14.3.1”), IBR approved for § 3175.31(a) and Table 1 to § 3175.80. (3) API MPMS Chapter 14, Section 3, Orifice Metering of Natural Gas and Other Related Hydrocarbon Fluids—Concentric, Square-edged Orifice Meters, Part 2, Specification and Installation Requirements; Fifth Edition, March 2016 (“API 14.3.2”), IBR approved for §§ 3175.46(b) and (c), 3175.61(a), 3175.80(c) through (g) and (i) through (l), and Table 1 to § 3175.80. (4) API MPMS Chapter 14, Section 3, Orifice Metering of Natural Gas and Other Related Hydrocarbon Fluids—Concentric, Square-edged Orifice Meters, Part 3, Natural Gas Applications; Fourth Edition, November 2013 (“API 14.3.3”), IBR approved for §§ 3175.94(a) and 3175.103(a). (5) API MPMS Chapter 14, Natural Gas Fluids Measurement, Section 3, Concentric, Square-Edged Orifice Meters, Part 3, Natural Gas Applications, Third Edition, August, 1992 (“API 14.3.3 (1992)”), IBR approved for § 3175.61(b). (6) API MPMS, Chapter 14, Section 5, Calculation of Gross Heating Value, Relative Density, Compressibility and Theoretical Hydrocarbon Liquid Content for Natural Gas Mixtures for Custody Transfer; Third Edition, January 2009; Reaffirmed February 2014 (“API 14.5”), IBR approved for §§ 3175.120(c) and 3175.125(a). (7) API MPMS Chapter 21, Section 1, Flow Measurement Using Electronic Metering Systems—Electronic Gas Measurement; Second Edition, February 2013 (“API 21.1”), IBR approved for Table 1 to § 3175.100, §§ 3175.101(e), 3175.102(a) and (c) through (e), 3175.103(b) and (c), and 3175.104(a) through (d). (8) API MPMS Chapter 22—Testing Protocol, Section 2, Differential Pressure Flow Measurement Devices; First Edition, August 2005; Reaffirmed August 2012 (“API 22.2”), IBR approved for § 3175.47(b) through (d). (d) Gas Processors Association (GPA), 6526 E. 60th Street, Tulsa, OK 74145; telephone 918-493-3872. (1) GPA Standard 2166-05, Obtaining Natural Gas Samples for Analysis by Gas Chromatography Revised 2005 (“GPA 2166-05”), IBR approved for §§ 3175.113(c) and (d), 3175.114(a), and 3175.117(a). (2) GPA Standard 2261-13, Analysis for Natural Gas and Similar Gaseous Mixtures by Gas Chromatography; Revised 2013 (“GPA 2261-13”), IBR approved for § 3175.118(a) and (c). (3) GPA Standard 2198-03, Selection, Preparation, Validation, Care and Storage of Natural Gas and Natural Gas Liquids Reference Standard Blends; Revised 2003 (“GPA 2198-03”), IBR approved for § 3175.118(c). (4) GPA Standard 2286-14, Method for the Extended Analysis of Natural Gas and Similar Gaseous Mixtures by Temperature Program Gas Chromatography; Revised 2014 (“GPA 2286-14”), IBR approved for § 3175.118(e). (e) Pipeline Research Council International (PRCI), 3141 Fairview Park Dr., Suite 525, Falls Church, VA 22042; telephone 703-205-1600. (1) PRCI Contract-NX-19, Manual for the Determination of Supercompressibility Factors for Natural Gas; December 1962 (“PRCI NX 19”), IBR approved for § 3175.61(b). (2) [Reserved] Note to paragraphs ( b e You may also be able to purchase these standards from the following resellers: Techstreet, 3916 Ranchero Drive, Ann Arbor, MI 48108; telephone 734-780-8000; www.techstreet.com/api/apigate.html www.ihs.com http://infostore.saiglobal.com/store/ § 3175.31 Specific performance requirements. (a) Flow rate measurement uncertainty levels. (2) For very-high-volume FMPs, the measuring equipment must achieve an overall flow rate measurement uncertainty within ±2 percent. (3) The determination of uncertainty is based on the values of flowing parameters ( e.g., (i) The average flowing parameters listed on the most recent daily QTR, if available to the BLM at the time of uncertainty determination; or (ii) The average flowing parameters from the previous day, as required under § 3175.101(b)(4)(i) through (iii) (for differential meters). (4) The uncertainty must be calculated under API 14.3.1, Section 12 (incorporated by reference, see § 3175.30) or other methods approved by the AO. (b) Heating value uncertainty levels. (2) For very-high-volume FMPs, the measuring equipment must achieve an annual average heating value uncertainty within ±1 percent. (3) Unless otherwise approved by the AO, the average annual heating value uncertainty must be determined as follows: (c) Bias. (d) Verifiability. § 3175.40 Measurement equipment approved by standard or make and model. The measurement equipment described in §§ 3175.41 through 3175.49 is approved for use at FMPs under the conditions and circumstances stated in those sections, provided it meets or exceeds the minimum standards prescribed in this subpart. § 3175.41 Flange-tapped orifice plates. Flange-tapped orifice plates that are constructed, installed, operated, and maintained in accordance with the standards in § 3175.80 are approved for use. § 3175.42 Chart recorders. Chart recorders used in conjunction with approved differential-type meters that are installed, operated, and maintained in accordance with the standards in § 3175.90 are approved for use for low-volume and very-low-volume FMPs only, and are not approved for high-volume or very-high-volume FMPs. § 3175.43 Transducers. (a) A transducer of a specific make, model, and URL is approved for use in conjunction with differential meters for high-volume or very-high-volume FMPs if it meets the following requirements: (1) It has been type-tested under § 3175.130; (2) The documentation required in § 3175.134 has been submitted to the PMT; and (3) It has been approved by the BLM and placed on the list of type-tested equipment maintained at www.blm.gov. (b) A transducer of a specific make, model, and URL, in use at an FMP before January 17, 2017, is approved for continued use if: (1) Data supporting the published performance specification of the transducer are submitted to the PMT in lieu of the documentation required in paragraph (a)(2) of this section; and (2) It has been approved by the BLM and placed on the list of type-tested equipment maintained at www.blm.gov (c) All transducers are approved for use at very-low- and low-volume FMPs. § 3175.44 Flow-computer software. (a) A flow computer of a particular make and model, and equipped with a particular software version, is approved for use at high- and very-high-volume FMPs if the flow computer and software version meet the following requirements: (1) The documentation required in § 3175.144 has been submitted to the PMT; (2) The PMT has determined that the flow computer and software version passed the type-testing required in § 3175.140, except as provided in paragraph (b) of this section; and (3) The BLM has approved the flow computer and software version and has placed them on the list of approved equipment maintained at www.blm.gov (b) Software versions (high- and very-high-volume FMPs). (2) Software revisions that do not affect or have the potential to affect the determination of flow rate, determination of volume, determination of heating value, or data and calculations used to verify flow rate, volume, or heating value are not required to be type-tested, however, the operator must provide the BLM with a list of these software versions and a brief description of what changes were made from the previous version. (The software manufacturer may provide such information instead of the operator.) (c) Software versions (low- and very-low-volume FMPs). § 3175.45 Gas chromatographs. GCs that meet the standards in §§ 3175.117 and 3175.118 for determining heating value and relative density are approved for use. § 3175.46 Isolating flow conditioners. The BLM will list on www.blm.gov (a) All testing required under this section must be performed at a qualified test facility not affiliated with the flow-conditioner manufacturer. (b) The operator or manufacturer must test the flow conditioner under API 14.3.2, Annex D (incorporated by reference, see § 3175.30) and submit all test data to the BLM. (c) The PMT will review the test data to ensure that the device meets the requirements of API 14.3.2, Annex D (incorporated by reference, see § 3175.30) and make a recommendation to the BLM to either approve use of the device, disapprove use of the device, or approve it with conditions for its use. (d) If approved, the BLM will add the approved make and model, and any applicable conditions of use, to the list maintained at www.blm.gov. § 3175.47 Differential primary devices other than flange-tapped orifice plates. A make, model, and size of differential primary device listed at www.blm.gov www.blm.gov (a) All testing required under this section must be performed at a qualified test facility not affiliated with the primary device manufacturer. (b) The primary device must be tested under API 22.2 (incorporated by reference, see § 3175.30). (c) The operator must submit to the BLM all test data required under API 22.2 (incorporated by reference, see § 3175.30). (The manufacturer of the primary device may submit such information instead of the operator.) (d) The PMT will review the test data to ensure that the primary device meets the requirements of API 22.2 (incorporated by reference, see § 3175.30) and § 3175.31(c) and (d) and make a recommendation to the BLM to either approve use of the device, disapprove use of the device, or approve its use with conditions. (e) If the primary device is approved by the BLM, the BLM will add the approved make and model, and any applicable conditions of use, to the list maintained at www.blm.gov. § 3175.48 Linear measurement devices. A make, model, and size of linear measurement device listed at www.blm.gov www.blm.gov (a) The linear measurement device must be tested at a qualified test facility not affiliated with the linear-measurement-device manufacturer; (b) The operator or manufacturer must submit to the BLM all test data required by the PMT; (c) The PMT will review the test data to ensure that the linear measurement device meets the requirements of § 3175.31(c) and (d) and make a recommendation to the BLM to either approve use of the device, disapprove use of the device, or approve its use with conditions; and (d) If the linear measurement device is approved, the BLM will add the approved make and model, and any applicable conditions of use, to the list maintained at www.blm.gov. § 3175.49 Accounting systems. An accounting system with a name and version listed at www.blm.gov (a) For daily QTRs (see § 3175.104(a)), an operator or vendor must submit daily QTRs to the BLM both from the accounting system and directly from the flow computer for at least 6 consecutive monthly reporting periods; (b) For hourly QTRs (see § 3175.104(a)), an operator must submit hourly QTRs to the BLM both from the accounting system and directly from the flow computer for at least 15 consecutive daily reporting periods. (A vendor may submit such information on behalf of an operator); (c) For configuration logs (see § 3175.104(b)), an operator must submit at least 10 configuration logs to the BLM taken at random times covering a span of at least 6 months both from the accounting system and directly from the flow computer. (A vendor may submit such information on behalf of an operator); (d) For event logs (see § 3175.104(c)), an operator must submit an event log to the BLM containing at least 50 events both from the accounting system and directly from the flow computer. (A vendor may submit such information on behalf of an operator); (e) For alarm logs (see § 3175.104(d)), an operator must submit an alarm log to the BLM containing at least 50 alarm conditions both from the accounting system and directly from the flow computer (a vendor may submit such information on behalf of an operator); (f) The BLM may require additional tests and records that may be necessary to determine that the software meets the requirements of § 3175.104(a); (g) The records retrieved directly from the flow computer in paragraphs (a) through (d) of this section must be unedited; (h) The records retrieved from the accounting system in paragraphs (a) through (d) must include both edited and unedited versions; and (i) The BLM will approve the accounting system name and version for use with the make and model of flow computer used for comparison, and add the system name and version to the list of approved systems maintained at www.blm.gov (1) The BLM compares the records retrieved directly from the flow computer with the unedited records from the accounting system and there are no significant discrepancies; and (2) The BLM compares the records retrieved directly from the flow computer with the edited records from the accounting system and all changes are clearly indicated, the reason for each change is indicated or is available upon request, and the edited version is clearly distinguishable from the unedited version. § 3175.60 Timeframes for compliance. (a) New FMPs. (2) The gas analysis reporting requirements of § 3175.120(e) and (f) will begin on January 17, 2019. (3) High- and very-high-volume FMPs must comply with the sampling frequency requirements of § 3175.115(b) starting on January 17, 2019. Between January 17, 2017 and January 17, 2019, the initial sampling frequencies required at high- and very-high-volume FMPs are those listed in Table 1 to § 3175.110. (4) Equipment approvals required in §§ 3175.43, 3175.44, and 3175.46 through 3175.49 will be required after January 17, 2019. (b) Existing FMPs. (2) High- and very-high-volume FMPs must comply with: (i) All of the requirements of this subpart except as specified in paragraphs (b)(2)(ii) and (iii) of this section by January 17, 2018; (ii) The gas analysis reporting requirements of § 3175.120(e) and (f) starting on January 17, 2019; and (iii) Equipment approvals required in §§ 3175.43, 3175.44, and 3175.46 through 3175.49 starting on January 17, 2019. (3) Low-volume FMPs must comply with all of the requirements of this subpart by January 17, 2019. (4) Very-low-volume FMPs must comply with all of the requirements of this subpart by January 17, 2020. (c) During the phase-in timeframes in paragraph (b) of this section, measuring procedures and equipment in place before January 17, 2017 must comply with the requirements in place prior to the issuance of this rule, including Onshore Oil and Gas Order No. 5, Measurement of Gas, and applicable NTLs, COAs, and written orders. (d) Onshore Oil and Gas Order No. 5, Measurement of Gas, statewide NTLs, variance approvals, and written orders that establish requirements or standards related to gas measurement and that are in effect on January 17, 2017 are rescinded as of: (1) January 17, 2018 for high-volume and very-high-volume FMPs; (2) January 17, 2019 for low-volume FMPs; and (3) January 17, 2020 for very-low-volume FMPs. § 3175.61 Grandfathering. (a) Meter tubes. (1) Orifice plate eccentricity must comply with AGA Report No. 3 (1985), Section 4.2.4 (incorporated by reference, see § 3175.30). (2) Meter tube construction and condition must comply with AGA Report No. 3 (1985), Section 4.3.4 (incorporated by reference, see § 3175.30). (3) Meter tube lengths. (ii) If the upstream meter tube contains a 19-tube bundle flow straightener or isolating flow conditioner, the installation must comply with § 3175.80(g); (b) EGM software. (2) EGM software installed at low-volume FMPs before January 17, 2017 is exempt from the requirements at § 3175.103(a)(1)(i) if the differential-pressure to static-pressure ratio, based on the monthly average differential pressure and static pressure, is less than the value of “ x i § 3175.70 Measurement location. (a) Commingling and allocation. (b) Off-lease measurement. § 3175.80 Flange-tapped orifice plates (primary devices). Except as stated in this section, as prescribed in Table 1 to this section, or grandfathered under § 3175.61, the standards and requirements in this section apply to all flange-tapped orifice plates (Note: The following table lists the standards in this subpart and the API standards that the operator must follow to install and maintain flange-tapped orifice plates. A requirement applies when a column is marked with an “x” or a number.). (a) The Beta ratio must be no less than 0.10 and no greater than 0.75. (b) The orifice bore diameter must be no less than 0.45 inches. (c) For FMPs measuring production from wells first coming into production, or from existing wells that have been re-fractured (including FMPs already measuring production from one or more other wells), the operator must inspect the orifice plate upon installation and then every 2 weeks thereafter. If the inspection shows that the orifice plate does not comply with API 14.3.2, Section 4 (incorporated by reference, see § 3175.30), the operator must replace the orifice plate. When the inspection shows that the orifice plate complies with API 14.3.2, Section 4 (incorporated by reference, see § 3175.30), the operator thereafter must inspect the orifice plate as prescribed in paragraph (d) of this section. (d) The operator must pull and inspect the orifice plate at the frequency (in months) identified in Table 1 to this section. The operator must replace orifice plates that do not comply with API 14.3.2, Section 4 (incorporated by reference, see § 3175.30), with an orifice plate that does comply with these standards. (e) The operator must retain documentation for every plate inspection and must include that documentation as part of the verification report (see § 3175.92(d) for mechanical recorders, or § 3175.102(e) for EGM systems). The operator must provide that documentation to the BLM upon request. The documentation must include: (1) The information required in § 3170.7(g) of this part; (2) Plate orientation (bevel upstream or downstream); (3) Measured orifice bore diameter; (4) Plate condition (compliance with API 14.3.2, Section 4 (incorporated by reference, see § 3175.30)); (5) The presence of oil, grease, paraffin, scale, or other contaminants on the plate; (6) Time and date of inspection; and (7) Whether or not the plate was replaced. (f) Meter tubes must meet the requirements of API 14.3.2, Subsections 5.1 through 5.4 (incorporated by reference, see § 3175.30). (g) If flow conditioners are used, they must be either isolating-flow conditioners approved by the BLM and installed under BLM requirements (see § 3175.46) or 19-tube-bundle flow straighteners constructed in compliance with API 14.3.2, Subsections 5.5.2 through 5.5.4, and located in compliance with API 14.3.2, Subsection 6.3 (incorporated by reference, see § 3175.30). (h) Basic meter tube inspection. (1) Perform a basic inspection of meter tubes within the timeframe (in years) specified in Table 1 to this section; (2) Conduct a basic inspection that is able to identify obstructions, pitting, and buildup of foreign substances (e.g., grease and scale); (3) Notify the AO at least 72 hours in advance of performing a basic inspection or submit a monthly or quarterly schedule of basic inspections to the AO in advance; (4) Conduct additional inspections, as the AO may require, if warranted by conditions, such as corrosive or erosive-flow (e.g., high H 2 2 (5) Maintain documentation of the findings from the basic meter tube inspection including: (i) The information required in § 3170.7(g) of this part; (ii) The time and date of inspection; (iii) The type of equipment used to make the inspection; and (iv) A description of findings, including location and severity of pitting, obstructions, and buildup of foreign substances; and (6) Complete the first inspection after January 17, 2017 within the timeframes (in years) given in Table 1 to this section. (i) Detailed meter tube inspection. (i) For low-volume FMPs, clean the meter tube of obstructions and foreign substances; (ii) For high- and very-high-volume FMPs, physically measure and inspect the meter tube to determine if the meter tube complies with API 14.3.2, Subsections 5.1 through 5.4 and API 14.3.2, Subsection 6.2 (incorporated by reference, see § 3175.30), or the requirements under § 3175.61(a), if the meter tube is grandfathered under § 3175.61(a). If the meter tube does not comply with the applicable standards, the operator must repair the meter tube to bring the meter tube into compliance with these standards or replace the meter tube with one that meets these standards; or (iii) Submit a request to the AO for an extension of the 30-day timeframe, justifying the need for the extension. (2) For all high- and very-high volume FMPs installed after January 17, 2017, the operator must perform a detailed inspection under paragraph (i)(1)(ii) of this section before operation of the meter. The operator may submit documentation showing that the meter tube complies with API 14.3.2, Subsections 5.1 through 5.4 (incorporated by reference, see § 3175.30) in lieu of performing a detailed inspection. (3) The operator must notify the AO at least 24 hours before performing a detailed inspection. (j) The operator must retain documentation of all detailed meter tube inspections, demonstrating that the meter tube complies with API 14.3.2, Subsections 5.1 through 5.4 (incorporated by reference, see § 3175.30), and showing all required measurements. The operator must provide such documentation to the BLM upon request for every meter-tube inspection. Documentation must also include the information required in § 3170.7(g) of this part. (k) Meter tube lengths. (2) For Beta ratios of less than 0.5, the location of 19-tube bundle flow straighteners installed in compliance with AGA Report No. 3 (1985), Section 4.4 (incorporated by reference, see § 3175.30), also complies with the location of 19-tube bundle flow straighteners as required in paragraph (k)(1) of this section. (3) If the diameter ratio (β) falls between the values in Tables 7, 8a, or 8b of API 14.3.2, Subsection 6.3 (incorporated by reference, see § 3175.30), the length identified for the larger diameter ratio in the appropriate Table is the minimum requirement for meter-tube length and determines the location of the end of the 19-tube-bundle flow straightener closest to the orifice plate. For example, if the calculated diameter ratio is 0.41, use the table entry for a 0.50 diameter ratio. (l) Thermometer wells. (2) Thermometer wells must be located in such a way that they can sense the same flowing gas temperature that exists at the orifice plate. The operator may accomplish this by physically locating the thermometer well(s) in the same ambient temperature conditions as the primary device (such as in a heated meter house) or by installing insulation and/or heat tracing along the entire meter run. If the operator chooses to use insulation to comply with this requirement, the AO may prescribe the quality of the insulation based on site specific factors such as ambient temperature, flowing temperature of the gas, composition of the gas, and location of the thermometer well in relation to the orifice plate (i.e., inside or outside of a meter house). (3) Where multiple thermometer wells have been installed in a meter tube, the flowing temperature must be measured from the thermometer well closest to the primary device. (4) Thermometer wells used to measure or verify flowing temperature must contain a thermally conductive liquid. (m) The sampling probe must be located as specified in § 3175.112(b). § 3175.90 Mechanical recorder (secondary device). (a) The operator may use a mechanical recorder as a secondary device only on very-low-volume and low-volume FMPs. (b) Table 1 to this section lists the standards that the operator must follow to install, operate, and maintain mechanical recorders. A requirement applies when a column is marked with an “x” or a number. § 3175.91 Installation and operation of mechanical recorders. (a) Gauge lines connecting the pressure taps to the mechanical recorder must: (1) Have a nominal diameter of not less than 3/8 inch, including ports and valves; (2) Be sloped upwards from the pressure taps at a minimum pitch of 1 inch per foot of length with no visible sag; (3) Be the same internal diameter along their entire length; (4) Not include tees, except for the static-pressure line; (5) Not be connected to more than one differential-pressure bellows and static-pressure element, or to any other device; and (6) Be no longer than 6 feet. (b) The differential-pressure pen must record at a minimum reading of 10 percent of the differential-pressure-bellows range for the majority of the flowing period. This requirement does not apply to inverted charts. (c) The flowing temperature of the gas must be continuously recorded and used in the volume calculations under § 3175.94(a)(1). (d) The following information must be maintained at the FMP in a legible condition, in compliance with § 3170.7(g) of this part, and accessible to the AO at all times: (1) Differential-pressure-bellows range; (2) Static-pressure-element range; (3) Temperature-element range; (4) Relative density (specific gravity) of the gas; (5) Static-pressure units of measure (psia or psig); (6) Meter elevation; (7) Meter-tube inside diameter; (8) Primary device type; (9) Orifice-bore or other primary-device dimensions necessary for device verification, Beta- or area-ratio determination, and gas-volume calculation; (10) Make, model, and location of approved isolating flow conditioners, if used; (11) Location of the downstream end of 19-tube-bundle flow straighteners, if used; (12) Date of last primary-device inspection; and (13) Date of last meter verification. (e) The differential pressure, static pressure, and flowing temperature elements must be operated between the lower- and upper-calibrated limits of the respective elements. § 3175.92 Verification and calibration of mechanical recorders. (a) Verification after installation or following repair. (i) All connections and fittings of the secondary device, including meter manifolds and verification equipment; (ii) The isolation valves; and (iii) The equalizer valves. (2) The operator must adjust the time lag between the differential- and static-pressure pens, if necessary, to be 1/96 of the chart rotation period, measured at the chart hub. For example, the time lag is 15 minutes on a 24-hour test chart and 2 hours on an 8-day test chart. (3) The meter's differential pen arc must be able to duplicate the test chart's time arc over the full range of the test chart, and must be adjusted, if necessary. (4) The as-left values must be verified in the following sequence against a certified pressure device for the differential-pressure and static-pressure elements (if the static-pressure pen has been offset for atmospheric pressure, the static-pressure element range is in psia): (i) Zero (vented to atmosphere); (ii) 50 percent of element range; (iii) 100 percent of element range; (iv) 80 percent of element range; (v) 20 percent of element range; and (vi) Zero (vented to atmosphere). (5) The following as-left temperatures must be verified by placing the temperature probe in a water bath with a certified test thermometer: (i) Approximately 10 °F below the lowest expected flowing temperature; (ii) Approximately 10 °F above the highest expected flowing temperature; and (iii) At the expected average flowing temperature. (6) If any of the readings required in paragraph (a)(4) or (5) of this section vary from the test device reading by more than the tolerances shown in Table 1 to this section, the operator must replace and verify the element for which readings were outside the applicable tolerances before returning the meter to service. (7) If the static-pressure pen is offset for atmospheric pressure: (i) The atmospheric pressure must be calculated under appendix A to this subpart; and (ii) The pen must be offset prior to obtaining the as-left verification values required in paragraph (a)(4) of this section. (b) Routine verification frequency. (c) Routine verification procedures. (2) No adjustments to the pens or linkages may be made until an as-found verification is obtained. If the static pen has been offset for atmospheric pressure, the static pen must not be reset to zero until the as-found verification is obtained. (3) The operator must obtain the as-found values of differential and static pressure against a certified pressure device at the readings listed in paragraph (a)(4) of this section, with the following additional requirements: (i) If there is sufficient data on site to determine the point at which the differential and static pens normally operate, the operator must also obtain an as-found value at those points; (ii) If there is not sufficient data on site to determine the points at which the differential and static pens normally operate, the operator must also obtain as-found values at 5 percent of the element range and 10 percent of the element range; and (iii) If the static-pressure pen has been offset for atmospheric pressure, the static-pressure element range is in units of psia. (4) The as-found value for temperature must be taken using a certified test thermometer placed in a test thermometer well if there is flow through the meter and the meter tube is equipped with a test thermometer well. If there is no flow through the meter or if the meter is not equipped with a test thermometer well, the temperature probe must be verified by placing it along with a test thermometer in an insulated water bath. (5) The element undergoing verification must be calibrated according to manufacturer specifications if any of the as-found values determined under paragraph (c)(3) or (4) of this section are not within the tolerances shown in Table 1 to this section, when compared to the values applied by the test equipment. (6) The operator must adjust the time lag between the differential- and static-pressure pens, if necessary, to be 1/96 of the chart rotation period, measured at the chart hub. For example, the time lag is 15 minutes on a 24-hour test chart and 2 hours on an 8-day test chart. (7) The meter's differential pen arc must be able to duplicate the test chart's time arc over the full range of the test chart, and must be adjusted, if necessary. (8) If any adjustment to the meter was made, the operator must perform an as-left verification on each element adjusted using the procedures in paragraphs (c)(3) and (4) of this section. (9) If, after an as-left verification, any of the readings required in paragraph (c)(3) or (4) of this section vary by more than the tolerances shown in Table 1 to this section when compared with the test-device reading, any element which has readings that are outside of the applicable tolerances must be replaced and verified under this section before the operator returns the meter to service. (10) If the static-pressure pen is offset for atmospheric pressure: (i) The atmospheric pressure must be calculated under appendix A to this subpart; and (ii) The pen must be offset prior to obtaining the as-left verification values required in paragraph (c)(3) of this section. (d) The operator must retain documentation of each verification, as required under § 3170.7(g) of this part, and submit it to the BLM upon request. This documentation must include: (1) The time and date of the verification and the prior verification date; (2) Primary-device data (meter-tube inside diameter and differential-device size and Beta or area ratio) if the orifice plate is pulled and inspected; (3) The type and location of taps (flange or pipe, upstream or downstream static tap); (4) Atmospheric pressure used to offset the static-pressure pen, if applicable; (5) Mechanical recorder data (make, model, and differential pressure, static pressure, and temperature element ranges); (6) The normal operating points for differential pressure, static pressure, and flowing temperature; (7) Verification points (as-found and applied) for each element; (8) Verification points (as-left and applied) for each element, if a calibration was performed; (9) Names, contact information, and affiliations of the person performing the verification and any witness, if applicable; and (10) Remarks, if any. (e) Notification of verification. (2) For routine verifications, the operator must notify the AO at least 72 hours before conducting the verification or submit a monthly or quarterly verification schedule to the AO in advance. (f) If, during the verification, the combined errors in as-found differential pressure, static pressure, and flowing temperature taken at the normal operating points tested result in a flow-rate error greater than 2 percent or 2 Mcf/day, whichever is greater, the volumes reported on the OGOR and on royalty reports submitted to ONRR must be corrected beginning with the date that the inaccuracy occurred. If that date is unknown, the volumes must be corrected beginning with the production month that includes the date that is half way between the date of the last verification and the date of the current verification. For example: Meter verification determined that the meter was reading 4 Mcf/day high at the normal operating points. The average flow rate measured by the meter is 90 Mcf/day. There is no indication of when the inaccuracy occurred. The date of the current verification was December 15, 2015. The previous verification was conducted on June 15, 2015. The royalty volumes reported on OGOR B that were based on this meter must be corrected for the 4 Mcf/day error back to September 15, 2015. (g) Test equipment used to verify or calibrate elements at an FMP must be certified at least every 2 years. Documentation of the recertification must be on-site during all verifications and must show: (1) Test equipment serial number, make, and model; (2) The date on which the recertification took place; (3) The test equipment measurement range; and (4) The uncertainty determined or verified as part of the recertification. § 3175.93 Integration statements. An unedited integration statement must be retained and made available to the BLM upon request. The integration statement must contain the following information: (a) The information required in § 3170.7(g) of this part; (b) The name of the company performing the integration; (c) The month and year for which the integration statement applies; (d) Meter-tube inside diameter (inches); (e) The following primary device information, as applicable: (i) Orifice bore diameter (inches); or (ii) Beta or area ratio, discharge coefficient, and other information necessary to calculate the flow rate; (f) Relative density (specific gravity); (g) CO 2 (h) N 2 (i) Heating value calculated under § 3175.125 (Btu/standard cubic feet); (j) Atmospheric pressure or elevation at the FMP; (k) Pressure base; (l) Temperature base; (m) Static-pressure tap location (upstream or downstream); (n) Chart rotation (hours or days); (o) Differential-pressure bellows range (inches of water); (p) Static-pressure element range (psi); and (q) For each chart or day integrated: (i) The time and date on and time and date off; (ii) Average differential pressure (inches of water); (iii) Average static pressure; (iv) Static-pressure units of measure (psia or psig); (v) Average temperature ( °F); (vi) Integrator counts or extension; (vii) Hours of flow; and (viii) Volume (Mcf). § 3175.94 Volume determination. (a) The volume for each chart integrated must be determined as follows: V IMV IV Where: V = reported volume, Mcf IMV = integral multiplier value, as calculated under this section IV = the integral value determined by the integration process (also known as the “extension,” “integrated extension,” and “integrator count”) (1) If the primary device is a flange-tapped orifice plate, a single IMV must be calculated for each chart or chart interval using the following equation: Where: C d β = Beta ratio Y = gas expansion factor, calculated under API 14.3.3, Subsection 5.6 or AGA Report No. 3 (1985), Section 5 (incorporated by reference, see § 3175.30) d = orifice diameter, in inches Z b G r Z f T f (2) For other types of primary devices, the IMV must be calculated using the equations and procedures recommended by the PMT and approved by the BLM, specific to the make, model, size, and area ratio of the primary device being used. (3) Variables that are functions of differential pressure, static pressure, or flowing temperature (e.g., C d f (b) Atmospheric pressure used to convert static pressure in psig to static pressure in psia must be determined under appendix A to this subpart. § 3175.100 Electronic gas measurement (secondary and tertiary device). Except as stated in this section, as prescribed in Table 1 to this section, or grandfathered under § 3175.61, the standards and requirements in this section apply to all EGM systems used at FMPs (Note: The following table lists the standards in this subpart and the API standards that the operator must follow to install and maintain EGM systems. A requirement applies when a column is marked with an “x” or a number.). § 3175.101 Installation and operation of electronic gas measurement systems. (a) Manifolds and gauge lines connecting the pressure taps to the secondary device must: (1) Have a nominal diameter of not less than 3/8 (2) Be sloped upwards from the pressure taps at a minimum pitch of 1 inch per foot of length with no visible sag; (3) Have the same internal diameter along their entire length; (4) Not include tees except for the static-pressure line; (5) Not be connected to any other devices or more than one differential pressure and static-pressure transducer. If the operator is employing redundancy verification, two differential pressure and two static-pressure transducers may be connected; and (6) Be no longer than 6 feet. (b) Each FMP must include a display, which must: (1) Be readable without the need for data-collection units, laptop computers, a password, or any special equipment; (2) Be on site and in a location that is accessible to the AO; (3) Include the units of measure for each required variable; (4) Display the software version and previous-day's volume, as well as the following variables consecutively: (i) Current flowing static pressure with units (psia or psig); (ii) Current differential pressure (inches of water); (iii) Current flowing temperature ( °F); and (iv) Current flow rate (Mcf/day or scf/day); and (5) Either display or post on site and accessible to the AO an hourly or daily QTR (see § 3175.104(a)) no more than 31 days old showing the following information: (i) Previous-period (for this section, previous period means at least 1 day prior, but no longer than 1 month prior) average differential pressure (inches of water); (ii) Previous-period average static pressure with units (psia or psig); and (iii) Previous-period average flowing temperature ( °F). (c) The following information must be maintained at the FMP in a legible condition, in compliance with § 3170.7(g) of this part, and accessible to the AO at all times: (1) The unique meter ID number; (2) Relative density (specific gravity); (3) Elevation of the FMP; (4) Primary device information, such as orifice bore diameter (inches) or Beta or area ratio and discharge coefficient, as applicable; (5) Meter-tube mean inside diameter; (6) Make, model, and location of approved isolating flow conditioners, if used; (7) Location of the downstream end of 19-tube-bundle flow straighteners, if used; (8) For self-contained EGM systems, make and model number of the system; (9) For component-type EGM systems, make and model number of each transducer and the flow computer; (10) URL and upper calibrated limit for each transducer; (11) Location of the static-pressure tap (upstream or downstream); (12) Last primary-device inspection date; and (13) Last secondary device verification date. (d) The differential pressure, static pressure, and flowing temperature transducers must be operated between the lower and upper calibrated limits of the transducer. The BLM may approve the differential pressure to exceed the upper calibrated limit of the differential-pressure transducer for brief periods in plunger lift operations; however, the differential pressure may not exceed the URL. (e) The flowing temperature of the gas must be continuously measured and used in the flow-rate calculations under API 21.1, Section 4 (incorporated by reference, see § 3175.30). § 3175.102 Verification and calibration of electronic gas measurement systems. (a) Transducer verification and calibration after installation or repair. (2) The operator must verify the points listed in API 21.1, Subsection 7.3.3 (incorporated by reference, see § 3175.30), by comparing the values from the certified test device with the values used by the flow computer to calculate flow rate. If any of these as-left readings vary from the test equipment reading by more than the tolerance determined by API 21.1, Subsection 8.2.2.2, Equation 24 (incorporated by reference, see § 3175.30), then that transducer must be replaced and the new transducer must be tested under this paragraph. (3) For absolute static-pressure transducers, the value of atmospheric pressure used when the transducer is vented to atmosphere must be calculated under appendix A to this subpart, measured by a NIST-certified barometer with a stated accuracy of ±0.05 psi or better, or obtained from an absolute-pressure calibration device. (4) Before putting a meter into service, the differential-pressure transducer must be tested at zero with full working pressure applied to both sides of the transducer. If the absolute value of the transducer reading is greater than the reference accuracy of the transducer, expressed in inches of water column, the transducer must be re-zeroed. (b) Routine verification frequency. (2) If redundancy verification under paragraph (d) of this section is used, the differential pressure, static pressure, and temperature transducers must be verified under the requirements of paragraph (d) of this section. In addition, the transducers must be verified under the requirements of paragraph (c) of this section at least annually. (c) Routine verification procedures. (1) Before performing any verification required under this section, the operator must perform a leak test consistent with § 3175.92(a)(1). (2) An as-found verification for differential pressure, static pressure and temperature must be conducted at the normal operating point of each transducer. (i) The normal operating point is the mean value taken over a previous time period not less than 1 day or greater than 1 month. Acceptable mean values include means weighted based on flow time and flow rate. (ii) For differential and static-pressure transducers, the pressure applied to the transducer for this verification must be within five percentage points of the normal operating point. For example, if the normal operating point for differential pressure is 17 percent of the upper calibrated limit, the normal point verification pressure must be between 12 percent and 22 percent of the upper calibrated limit. (iii) For the temperature transducer, the water bath or test thermometer well must be within 20 °F of the normal operating point for temperature. (3) If any of the as-found values are in error by more than the manufacturer's specification for stability or drift—as adjusted for static pressure and ambient temperature—on two consecutive verifications, that transducer must be replaced prior to returning the meter to service. (4) If a transducer is calibrated, the as-left verification must include the normal operating point of that transducer, as defined in paragraph (c)(2) of this section. (5) The as-found values for differential pressure obtained with the low side vented to atmospheric pressure must be corrected to working-pressure values using API 21.1, Annex H, Equation H.1 (incorporated by reference, see § 3175.30). (6) The verification tolerance for differential and static pressure is defined by API 21.1, Subsection 8.2.2.2, Equation 24 (incorporated by reference, see § 3175.30). The verification tolerance for temperature is equivalent to the uncertainty of the temperature transmitter or 0.5 °F, whichever is greater. (7) All required verification points must be within the verification tolerance before returning the meter to service. (8) Before putting a meter into service, the differential-pressure transducer must be tested at zero with full working pressure applied to both sides of the transducer. If the absolute value of the transducer reading is greater than the reference accuracy of the transducer, expressed in inches of water column, the transducer must be re-zeroed. (d) Redundancy verification procedures. (1) The operator must identify which set of transducers is used for reporting on the OGOR (the primary transducers) and which set of transducers is used as a check (the check set of transducers); (2) For every calendar month, the operator must compare the flow-time linear averages of differential pressure, static pressure, and temperature readings from the primary transducers with those from the check transducers; (3)(i) If for any transducer the difference between the averages exceeds the tolerance defined by the following equation: Where: A p A c (ii) The operator must verify both the primary and check transducer under paragraph (c) of this section within the first 5 days of the month following the month in which the redundancy verification was performed. For example, if the redundancy verification for March reveals that the difference in the flow-time linear averages of differential pressure exceeded the verification tolerance, both the primary and check differential-pressure transducers must be verified under paragraph (c) of this section by April 5th. (e) The operator must retain documentation of each verification for the period required under § 3170.7 of this part, including calibration data for transducers that were replaced, and submit it to the BLM upon request. (1) For routine verifications, this documentation must include: (i) The information required in § 3170.7(g) of this part; (ii) The time and date of the verification and the last verification date; (iii) Primary device data (meter-tube inside diameter and differential-device size, Beta or area ratio); (iv) The type and location of taps (flange or pipe, upstream or downstream static tap); (v) The flow computer make and model; (vi) The make and model number for each transducer, for component-type EGM systems; (vii) Transducer data (make, model, differential, static, temperature URL, and upper calibrated limit); (viii) The normal operating points for differential pressure, static pressure, and flowing temperature; (ix) Atmospheric pressure; (x) Verification points (as-found and applied) for each transducer; (xi) Verification points (as-left and applied) for each transducer, if calibration was performed; (xii) The differential device inspection date and condition (e.g., clean, sharp edge, or surface condition); (xiii) Verification equipment make, model, range, accuracy, and last certification date; (xiv) The name, contact information, and affiliation of the person performing the verification and any witness, if applicable; and (xv) Remarks, if any. (2) For redundancy verification checks, this documentation must include; (i) The information required in § 3170.7(g) of this part; (ii) The month and year for which the redundancy check applies; (iii) The makes, models, upper range limits, and upper calibrated limits of the primary set of transducers; (iv) The makes, models, upper range limits, and upper calibrated limits of the check set of transducers; (v) The information required in API 21.1, Annex I (incorporated by reference, see § 3175.30); (vii) The tolerance for differential pressure, static pressure, and temperature as calculated under paragraph (d)(2) of this section; and (viii) Whether or not each transducer required verification under paragraph (c) of this section. (f) Notification of verification. (2) For routine verifications, the operator must notify the AO at least 72 hours before conducting the verification or submit a monthly or quarterly verification schedule to the AO in advance. (g) If, during the verification, the combined errors in as-found differential pressure, static pressure, and flowing temperature taken at the normal operating points tested result in a flow-rate error greater than 2 percent or 2 Mcf/day, whichever is greater, the volumes reported on the OGOR and on royalty reports submitted to ONRR must be corrected beginning with the date that the inaccuracy occurred. If that date is unknown, the volumes must be corrected beginning with the production month that includes the date that is half way between the date of the last verification and the date of the present verification. See the example in § 3175.92(f). (h) Test equipment requirements. (i) The test equipment serial number, make, and model; (ii) The date on which the recertification took place; (iii) The range of the test equipment; and (iv) The uncertainty determined or verified as part of the recertification. (2) Test equipment used to verify or calibrate transducers at an FMP must meet the following accuracy standards: (i) The accuracy of the test equipment, stated in actual units of measure, must be no greater than 0.5 times the reference accuracy of the transducer being verified, also stated in actual units of measure; or (ii) The equipment must have a stated accuracy of at least 0.10 percent of the upper calibrated limit of the transducer being verified. § 3175.103 Flow rate, volume, and average value calculation. (a) The flow rate must be calculated as follows: (1) For flange-tapped orifice plates, the flow rate must be calculated under: (i) API 14.3.3, Section 4 and API 14.3.3, Section 5 (incorporated by reference, see § 3175.30); and (ii) AGA Report No. 8 (incorporated by reference, see § 3175.30), for supercompressibility. (2) For primary devices other than flange-tapped orifice plates, for which there are no industry standards, the flow rate must be calculated under the equations and procedures recommended by the PMT and approved by the BLM, specific to the make, model, size, and area ratio of the primary device used. (b) Atmospheric pressure used to convert static pressure in psig to static pressure in psia must be determined under API 21.1, Subsection 8.3.3 (incorporated by reference, see § 3175.30). (c) Hourly and daily gas volumes, average values of the live input variables, flow time, and integral value or average extension as required under § 3175.104 must be determined under API 21.1, Section 4 and API 21.1, Annex B (incorporated by reference, see § 3175.30). § 3175.104 Logs and records. (a) The operator must retain, and submit to the BLM upon request, the original, unaltered, unprocessed, and unedited daily and hourly QTRs, which must contain the information identified in API 21.1, Subsection 5.2 (incorporated by reference, see § 3175.30), with the following additions and clarifications: (1) The information required in § 3170.7(g) of this part; (2) The volume, flow time, and integral value or average extension must be reported to at least 5 decimal places. The average differential pressure, static pressure, and temperature as calculated in § 3175.103(c), must be reported to at least three decimal places; and (3) A statement of whether the operator has submitted the integral value or average extension. (b) The operator must retain, and submit to the BLM upon request, the original, unaltered, unprocessed, and unedited configuration log, which must contain the information specified in API 21.1, Subsection 5.4 (including the flow-computer snapshot report in API 21.1, Subsection 5.4.2), and API 21.1, Annex G (incorporated by reference, see § 3175.30), with the following additions and clarifications: (1) The information required in § 3170.7(g) of this part; (2) Software/firmware identifiers under API 21.1, Subsection 5.3 (incorporated by reference, see § 3175.30); (3) For very-low-volume FMPs only, the fixed temperature, if not continuously measured ( °F); and (4) The static-pressure tap location (upstream or downstream). (c) The operator must retain, and submit to the BLM upon request, the original, unaltered, unprocessed, and unedited event log. The event log must comply with API 21.1, Subsection 5.5 (incorporated by reference, see § 3175.30), with the following additions and clarifications: The event log must have sufficient capacity and must be retrieved and stored at intervals frequent enough to maintain a continuous record of events as required under § 3170.7 of this part, or the life of the FMP, whichever is shorter. (d) The operator must retain an alarm log and provide it to the BLM upon request. The alarm log must comply with API 21.1, Subsection 5.6 (incorporated by reference, see § 3175.30). (e) Records may only be submitted from accounting system names and versions and flow computer makes and models that have been approved by the BLM (see § 3175.49). § 3175.110 Gas sampling and analysis. Except as stated in this section or as prescribed in Table 1 to this section, the standards and requirements in this section apply to all gas sampling and analyses. (Note: The following table lists the standards in this subpart and the API standards that the operator must follow to take a gas sample, analyze the gas sample, and report the findings of the gas analysis. A requirement applies when a column is marked with an “x” or a number.) § 3175.111 General sampling requirements. (a) Samples must be taken by one of the following methods: (1) Spot sampling under §§ 3175.113 through 3175.115; (2) Flow-proportional composite sampling under § 3175.116; or (3) On-line gas chromatograph under § 3175.117. (b) At all times during the sampling process, the minimum temperature of all gas sampling components must be the lesser of: (1) The flowing temperature of the gas measured at the time of sampling; or (2) 30 °F above the calculated hydrocarbon dew point of the gas. § 3175.112 Sampling probe and tubing. (a) All gas samples must be taken from a sample probe that complies with the requirements of paragraphs (b) and (c) of this section. (b) Location of sample probe. (2) The sample probe must be exposed to the same ambient temperature as the primary device. The operator may accomplish this by physically locating the sample probe in the same ambient temperature conditions as the primary device (such as in a heated meter house) or by installing insulation and/or heat tracing along the entire meter run. If the operator chooses to use insulation to comply with this requirement, the AO may prescribe the quality of the insulation based on site specific factors such as ambient temperature, flowing temperature of the gas, composition of the gas, and location of the sample probe in relation to the orifice plate (i.e., inside or outside of a meter house). (c) Sample probe design and type. (2) If a regulating type of sample probe is used, the pressure-regulating mechanism must be inside the pipe or maintained at a temperature of at least 30 °F above the hydrocarbon dew point of the gas. (3) The sample probe length must be the shorter of: (i) The length necessary to place the collection end of the probe in the center one third of the pipe cross-section; or (ii) The recommended length of the probe in Table 1 in API 14.1, Subsection 6.4 (incorporated by reference, see § 3175.30). (4) The use of membranes, screens, or filters at any point in the sample probe is prohibited. (d) Sample tubing connecting the sample probe to the sample container or analyzer must be constructed of stainless steel or nylon 11. § 3175.113 Spot samples—general requirements. (a) If an FMP is not flowing at the time that a sample is due, a sample must be taken within 15 days after flow is re-initiated. Documentation of the non-flowing status of the FMP must be entered into GARVS as required under § 3175.120(f). (b) The operator must notify the AO at least 72 hours before obtaining a spot sample as required by this subpart, or submit a monthly or quarterly schedule of spot samples to the AO in advance of taking samples. (c) Sample cylinder requirements. (1) Comply with API 14.1, Subsection 9.1 (incorporated by reference, see § 3175.30); (2) Have a minimum capacity of 300 cubic centimeters; and (3) Be cleaned before sampling under GPA 2166-05, Appendix A (incorporated by reference, see § 3175.30), or an equivalent method. The operator must maintain documentation of cleaning (see § 3170.7), have the documentation available on site during sampling, and provide it to the BLM upon request. (d) Spot sampling using portable gas chromatographs. (i) Be constructed of stainless steel; (ii) Be cleaned under GPA 2166-05, Appendix A (incorporated by reference, see § 3175.30), or an equivalent method, prior to sampling. The operator must maintain documentation of cleaning (see § 3170.7), have the documentation available on site during sampling, and provide it to the BLM upon request; and (iii) Be operated under GPA 2166-05, Appendix B.3 (incorporated by reference, see § 3175.30). (2) The sample port and inlet to the sample line must be purged using the gas being sampled before completing the connection between them. (3) The portable GC must be operated, verified, and calibrated under § 3175.118. (4) The documentation of verification or calibration required in § 3175.118(d) must be available for inspection by the BLM at the time of sampling. (5) Minimum number of samples and analyses. (ii) For high-volume FMPs, samples must be taken and analyzed until the difference between the maximum heating value and minimum heating value calculated from three consecutive analyses is less than or equal to 16 Btu/scf; (iii) For very-high-volume FMPs, samples must be taken and analyzed until the difference between the maximum heating value and minimum heating value calculated from three consecutive analyses is less than or equal to 8 Btu/scf. (6) The heating value and relative density used for OGOR reporting must be: (i) The mean heating value and relative density calculated from the three analyses required in paragraph (d)(5) of this section; (ii) The median heating value and relative density calculated from the three analyses required in paragraph (d)(5) of this section; or (iii) Any other method approved by the BLM. § 3175.114 Spot samples—allowable methods. (a) Spot samples must be obtained using one of the following methods: (1) Purging—fill and empty method. (2) Helium “pop” method. (3) Floating piston cylinder method. (4) Portable gas chromatograph. (5) Other methods approved by the BLM (through the PMT) and posted at www.blm.gov (b) If the operator uses either a purging—fill and empty method or a helium “pop” method, and if the flowing pressure at the sample port is less than or equal to 15 psig, the operator may also employ a vacuum-gathering system. Samples taken using a vacuum-gathering system must comply with API 14.1, Subsection 11.10 (incorporated by reference, see § 3175.30), and the samples must be obtained from the discharge of the vacuum pump. § 3175.115 Spot samples—frequency. (a) Unless otherwise required under paragraph (b) of this section, spot samples for all FMPs must be taken and analyzed at the frequency (once during every period, stated in months) prescribed in Table 1 to § 3175.110. (b) After the time frames listed in paragraph (b)(1) of this section, the BLM may change the required sampling frequency for high-volume and very-high-volume FMPs if the BLM determines that the sampling frequency required in Table 1 in § 3175.110 is not sufficient to achieve the heating value uncertainty levels required in § 3175.31(b). (1) Timeframes for implementation. (ii) For very-high-volume FMPs, the BLM may change the sampling frequency or require compliance with paragraph (b)(5) of this section no sooner than 1 year after the FMP begins measuring gas or January 17, 2020, whichever is later. (2) The BLM will calculate the new sampling frequency needed to achieve the heating value uncertainty levels required in § 3175.31(b). The BLM will base the sampling frequency calculation on the heating value variability. The BLM will notify the operator of the new sampling frequency. (3) The new sampling frequency will remain in effect until the heating value variability justifies a different frequency. (4) The new sampling frequency will not be more frequent than once every 2 weeks nor less frequent than once every 6 months. (5) For very-high-volume FMPs, the BLM may require the installation of a composite sampling system or on-line GC if the heating value uncertainty levels in § 3175.31(b) cannot be achieved through spot sampling. Composite sampling systems or on-line gas chromatographs that are installed and operated in accordance with this section comply with the uncertainty requirement of § 3175.31(b)(2). (c) The time between any two samples must not exceed the timeframes shown in Table 1 to this section. (d) If a composite sampling system or an on-line GC is installed under § 3175.116 or § 3175.117, either on the operator's own initiative or in response to a BLM order for a very-high-volume FMP under paragraph (b)(5) of this section, it must be installed and operational no more than 30 days after the due date of the next sample. (e) The required sampling frequency for an FMP at which a composite sampling system or an on-line gas chromatograph is removed from service is prescribed in paragraph (a) of this section. § 3175.116 Composite sampling methods. (a) Composite samplers must be flow-proportional. (b) Samples must be collected using a positive-displacement pump. (c) Sample cylinders must be sized to ensure the cylinder capacity is not exceeded within the normal collection frequency. § 3175.117 On-line gas chromatographs. (a) On-line GCs must be installed, operated, and maintained under GPA 2166-05, Appendix D (incorporated by reference, see § 3175.30), and the manufacturer's specifications, instructions, and recommendations. (b) The GC must comply with the verification and calibration requirements of § 3175.118. The results of all verifications must be submitted to the AO upon request. (c) Upon request, the operator must submit to the AO the manufacturer's specifications and installation and operational recommendations. § 3175.118 Gas chromatograph requirements. (a) All GCs must be installed, operated, and calibrated under GPA 2261-13 (incorporated by reference, see § 3175.30). (b) Samples must be analyzed until the un-normalized sum of the mole percent of all gases analyzed is between 97 and 103 percent. (c) A GC may not be used to analyze any sample from an FMP until the verification meets the standards of this paragraph (c). (1) GCs must be verified under GPA 2261-13, Section 6 (incorporated by reference, see § 3175.30), not less than once every 7 days. (2) All gases used for verification and calibration must meet the standards of GPA 2198-03, Sections 3 and 4 (incorporated by reference, see § 3175.30). (3) All new gases used for verification and calibration must be authenticated prior to verification or calibration under the standards of GPA 2198-03, Section 5 (incorporated by reference, see § 3175.30). (4) The gas used to calibrate a GC must be maintained under Section 6 of GPA 2198-03 (incorporated by reference, see § 3175.30). (5) If the composition of the gas used for verification as determined by the GC varies from the certified composition of the gas used for verification by more than the reproducibility values listed in GPA 2261-13, Section 10 (incorporated by reference, see § 3175.30), the GC must be calibrated under GPA 2261-13, Section 6 (incorporated by reference, see § 3175.30). (6) If the GC is calibrated, it must be re-verified under paragraph (c)(5) of this section. (d) The operator must retain documentation of the verifications for the period required under § 3170.6 of this part, and make it available to the BLM upon request. The documentation must include: (1) The components analyzed; (2) The response factor for each component; (3) The peak area for each component; (4) The mole percent of each component as determined by the GC; (5) The mole percent of each component in the gas used for verification; (6) The difference between the mole percents determined in paragraphs (d)(4) and (5) of this section, expressed in relative percent; (7) Evidence that the gas used for verification and calibration: (i) Meets the requirements of paragraph (c)(2) of this section, including a unique identification number of the calibration gas used, the name of the supplier of the calibration gas, and the certified list of the mole percent of each component in the calibration gas; (ii) Was authenticated under paragraph (c)(3) of this section prior to verification or calibration, including the fidelity plots; and (iii) Was maintained under paragraph (c)(4) of this section, including the fidelity plot made as part of the calibration run; (8) The chromatograms generated during the verification process; (9) The time and date the verification was performed; and (10) The name and affiliation of the person performing the verification. (e) Extended analyses must be taken in accordance with GPA 2286-14 (incorporated by reference, see § 3175.30) or other method approved by the BLM. § 3175.119 Components to analyze. (a) The gas must be analyzed for the following components: (1) Methane; (2) Ethane; (3) Propane; (4) Iso Butane; (5) Normal Butane; (6) Pentanes; (7) Hexanes + (C 6 (8) Carbon dioxide; and (9) Nitrogen. (b) When the concentration of C 6 (1) Hexanes; (2) Heptanes; (3) Octanes; and (4) Nonanes +. (c) In lieu of testing each sample for the components required under paragraph (b) of this section, the operator may periodically test for these components and adjust the assumed C 6 6 6 (1) For high-volume FMPs, once per year; and (2) For very-high-volume FMPs, once every 6 months. § 3175.120 Gas analysis report requirements. (a) The gas analysis report must contain the following information: (1) The information required in § 3170.7(g) of this part; (2) The date and time that the sample for spot samples was taken or, for composite samples, the date the cylinder was installed and the date the cylinder was removed; (3) The date and time of the analysis; (4) For spot samples, the effective date, if other than the date of sampling; (5) For composite samples, the effective start and end date; (6) The name of the laboratory where the analysis was performed; (7) The device used for analysis (i.e., GC, calorimeter, or mass spectrometer); (8) The make and model of analyzer; (9) The date of last calibration or verification of the analyzer; (10) The flowing temperature at the time of sampling; (11) The flowing pressure at the time of sampling, including units of measure (psia or psig); (12) The flow rate at the time of sampling; (13) The ambient air temperature at the time of sampling; (14) Whether or not heat trace or any other method of heating was used; (15) The type of sample (i.e., spot-cylinder, spot-portable GC, composite); (16) The sampling method if spot-cylinder (e.g., fill and empty, helium pop); (17) A list of the components of the gas tested; (18) The un-normalized mole percents of the components tested, including a summation of those mole percents; (19) The normalized mole percent of each component tested, including a summation of those mole percents; (20) The ideal heating value (Btu/scf); (21) The real heating value (Btu/scf), dry basis; (22) The hexane+ split, if applicable; (23) The pressure base and temperature base; (24) The relative density; and (25) The name of the company obtaining the gas sample. (b) Components that are listed on the analysis report, but not tested, must be annotated as such. (c) The heating value and relative density must be calculated under API 14.5 (incorporated by reference, see § 3175.30). (d) The base supercompressibility must be calculated under AGA Report No. 8 (incorporated by reference, see § 3175.30). (e) The operator must submit all gas analysis reports to the BLM within 15 days of the due date for the sample as specified in § 3175.115. (f) Unless a variance is granted, the operator must submit all gas analysis reports and other required related information electronically through the GARVS. The BLM will grant a variance to the electronic-submission requirement only in cases where the operator demonstrates that it is a small business, as defined by the U.S. Small Business Administration, and does not have access to the Internet. § 3175.121 Effective date of a spot or composite gas sample. (a) Unless otherwise specified on the gas analysis report, the effective date of a spot sample is the date on which the sample was taken. (b) The effective date of a spot gas sample may be no later than the first day of the production month following the operator's receipt of the laboratory analysis of the sample. (c) Unless otherwise specified on the gas analysis report, the effective date of a composite sample is the first of the month in which the sample was removed. (d) The provisions of this section apply only to OGORs, QTRs, and gas sample reports generated after January 17, 2017. § 3175.125 Calculation of heating value and volume (a) The heating value of the gas sampled must be calculated as follows: (1) Gross heating value is defined by API 14.5, Subsection 3.7 (incorporated by reference, see § 3175.30) and must be calculated under API 14.5, Subsection 7.1 (incorporated by reference, see § 3175.30); and (2) Real heating value must be calculated by dividing the gross heating value of the gas calculated under paragraph (a)(1) of this section by the compressibility factor of the gas at 14.73 psia and 60 °F. (b) Average heating value determination. (2) If the effective date of a heating value for an FMP is other than the first day of the reporting month, the average heating value of the FMP must be the volume-weighted average of heating values, determined as follows: Where: HV i i HV i j i V i j i Subscript i represents each FMP for the lease, unit PA, or CA Subscript j represents a partial month for which heating value HV i j m = the number of different heating values in a reporting month for an FMP (c) The volume must be determined under § 3175.94 (mechanical recorders) or § 3175.103(c) (EGM systems). § 3175.126 Reporting of heating value and volume. (a) The gross heating value and real heating value, or average gross heating value and average real heating value, as applicable, derived from all samples and analyses must be reported on the OGOR in units of Btu/scf under the following conditions: (1) Containing no water vapor (“dry”), unless the water vapor content has been determined through actual on-site measurement and reported on the gas analysis report. The heating value may not be reported on the basis of an assumed water-vapor content. Acceptable methods of measuring water vapor are: (i) Chilled mirror; (ii) Laser detectors; and (iii) Other methods approved by the BLM; (2) Adjusted to a pressure of 14.73 psia and a temperature of 60 °F; and (3) For samples analyzed under § 3175.119(a), and notwithstanding any provision of a contract between the operator and a purchaser or transporter, the composition of hexane+ is deemed to be: (i) 60 percent n-hexane, 30 percent n-heptane, and 10 percent n-octane; or (ii) The composition determined under § 3175.119(c). (b) The volume for royalty purposes must be reported on the OGOR in units of Mcf as follows: (1) The volume must not be adjusted for water-vapor content or any other factors that are not included in the calculations required in § 3175.94 or § 3175.103; and (2) The volume must match the monthly volume(s) shown in the unedited QTR(s) or integration statement(s) unless edits to the data are documented under paragraph (c) of this section. (c) Edits and adjustments to reported volume or heating value. (2) All edits made to the data before the submission of the OGOR must be documented and include verifiable justifications for the edits made. This documentation must be maintained under § 3170.7 of this part and must be submitted to the BLM upon request. (3) All values on daily and hourly QTRs that have been changed or edited must be clearly identified and must be cross referenced to the justification required in paragraph (c)(2) of this section. (4) The volumes reported on the OGOR must be corrected beginning with the date that the inaccuracy occurred. If that date is unknown, the volumes must be corrected beginning with the production month that includes the date that is half way between the date of the previous verification and the most recent verification date. § 3175.130 Transducer testing protocol. The BLM will approve a particular make, model, and range of differential-pressure, static-pressure, or temperature transducer for use in an EGM system only if the testing performed on the transducer met all of the standards and requirements stated in §§ 3175.131 through 3175.135. § 3175.131 General requirements for transducer testing. (a) All testing must be performed by a qualified test facility. (b) Number and selection of transducers tested. (2) The serial number of each transducer selected must be documented. The date, location, and batch identifier, if applicable, of manufacture must be ascertainable from the serial number. (3) For the purpose of this section, the term “model” refers to the base model number on which the BLM determines the transducer performance. For example: A manufacturer makes a transmitter with a model number 1234-XYZ, where “1234” identifies the transmitter cell, “X” identifies the output type, “Y” identifies the mounting type, and “Z” identifies where the static pressure is taken. The testing under this section would only be required on the base model number (“1234”), assuming that “X”, “Y”, or “Z” does not affect the performance of the transmitter. (4) For multi-variable transducers, each cell URL must be tested only once under this section. For example: A manufacturer of a transducer measuring both differential and static pressure makes a model with available differential-pressure URLs of 100 inches, 500 inches, and 1,000 inches, and static-pressure URLs of 250 psia, 1,000 psia, and 2,500 psia. Although there are nine possible combinations of differential-pressure and static-pressure URLs, only six tests are required to cover each cell URL. (c) Test conditions—general. (1) Rated voltage: (2) Rated frequency: (3) Alternating current harmonic distortion: Less than 5 percent; and (4) Direct current ripple: (d) The input and output (if the output is analog) of each transducer must be measured with equipment that has a published reference uncertainty less than or equal to 25 percent of the published reference uncertainty of the transducer under test across the measurement range common to both the transducer under test and the test instrument. Reference uncertainty for both the test instrument and the transducer under test must be expressed in the units the transducer measures to determine acceptable uncertainty. For example, if the transducer under test has a published reference uncertainty of ±0.05 percent of span, and a span of 0 to 500 psia, then this transducer has a reference accuracy of ±0.25 psia (0.05 percent of 500 psia). To meet the requirements of this paragraph (d), the test instrument in this example must have an uncertainty of ±0.0625 psia or less (25 percent of ±0.25 psia). (e) If the manufacturer's performance specifications for the transducer under test include corrections made by an external device (such as linearization), then the external device must be tested along with the transducer and be connected to the transducer in the same way as in normal field operations. (f) If the manufacturer specifies the extent to which the measurement range of the transducer under test may be adjusted downward (i.e., spanned down), then each test required in §§ 3175.132 and 3175.133 must be carried out at least at both the URL and the minimum upper calibrated limit specified by the manufacturer. For upper calibrated limits between the maximum and the minimum span that are not tested, the BLM will use the greater of the uncertainties measured at the maximum and minimum spans in determining compliance with the requirements of § 3175.31(a). (g) After initial calibration, no calibration adjustments to the transducer may be made until all required tests in §§ 3175.132 and 3175.133 are completed. (h) For all of the testing required in §§ 3175.132 and 3175.133, the term “tested for accuracy” means a comparison between the output of the transducer under test and the test equipment taken as follows: (1) The following values must be tested in the order shown, expressed as a percent of the transducer span: (i) (Ascending values) 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, and 100; and (ii) (Descending values) 100, 90, 80, 70, 60, 50, 40, 30, 20, 10, and 0. (2) If the device under test is an absolute-pressure transducer, the “0” values listed in paragraphs (h)(1)(i) and (ii) of this section must be replaced with “atmospheric pressure at the test facility;” (3) Input approaching each required test point must be applied asymptotically without overshooting the test point; (4) The comparison of the transducer and the test equipment measurements must be recorded at each required point; and (5) For static-pressure transducers, the following test point must be included for all tests: (i) For gauge-pressure transducers, a gauge pressure of −5 psig; and (ii) For absolute-pressure transducers, an absolute pressure of 5 psia. § 3175.132 Testing of reference accuracy. (a) The following reference test conditions must be maintained for the duration of the testing: (1) Ambient air temperature must be between 59 °F and 77 °F and must not vary over the duration of the test by more than ±2 °F; (2) Relative humidity must be between 45 percent and 75 percent and must not vary over the duration of the test by more than ±5 percent; (3) Atmospheric pressure must be between 12.46 psi and 15.36 psi and must not vary over the duration of the test by more than ±0.2 psi; (4) The transducer must be isolated from any externally induced vibrations; (5) The transducer must be mounted according to the manufacturer's specifications in the same manner as it would be mounted in normal field operations; (6) The transducer must be isolated from any external electromagnetic fields; and (7) For reference accuracy testing of differential-pressure transducers, the downstream side of the transducer must be vented to the atmosphere. (b) Before reference testing begins, the following pre-conditioning steps must be followed: (1) After power is applied to the transducer, it must be allowed to stabilize for at least 30 minutes before applying any input pressure or temperature; (2) The transducer must be exercised by applying three full-range traverses in each direction; and (3) The transducer must be calibrated according to manufacturer specifications if a calibration is required or recommended by the manufacturer. (c) Immediately following preconditioning, the transducer must be tested at least three times for accuracy under § 3175.131(h). The results of these tests must be used to determine the transducer's reference accuracy under § 3175.135. § 3175.133 Testing of influence effects. (a) General requirements. (2) After completing the required tests for each influence effect under this section, the transducer under test must be returned to reference conditions and tested for accuracy under § 3175.132. (b) Ambient temperature. (2) The ambient temperature must be held to ±4 °F from each required temperature during the accuracy test at each point. (3) The rate of temperature change between tests must not exceed 2 °F per minute. (4) The transducer must be allowed to stabilize at each test temperature for at least 1 hour. (5) For each required temperature test point listed in this paragraph, the transducer must be tested for accuracy under § 3175.131(h). (c) Static-pressure effects (differential-pressure transducers only). (2) For multivariable transducers, the following pressures must be applied equally to both sides of the transducer, expressed in percent of the URL of the static-pressure transducer: 0, 50, 100, 75, 25, 0. (3) For each point required in paragraphs (c)(1) and (2) of this section, the transducer must be tested for accuracy under § 3175.131(h). (d) Mounting position effects. (1) At an angle of −10° from a vertical plane; (2) At an angle of +10° from a vertical plane; (3) At an angle of −10° from a vertical plane perpendicular to the vertical plane required in paragraphs (d)(1) and (2) of this section; and (4) At an angle of +10° from a vertical plane perpendicular to the vertical plane required in paragraphs (d)(1) and (2) of this section. (e) Over-range effects. (2) After removing the applied pressure, the transducer must be tested for accuracy under § 3175.131(h). (3) No more than 5 minutes must be allowed between performing the procedures described in paragraphs (e)(1) and (2) of this section. (f) Vibration effects. (i) The amplitude of the applied test frequency must be at least 0.35mm below 60 Hertz (Hz) and 49 meter per second squared (m/s 2 (ii) The applied frequency must be swept from 10 Hz to 2,000 Hz at a rate not greater than 0.5 octaves per minute. (2) After the initial resonance search, an endurance conditioning test must be conducted as follows: (i) Twenty frequency sweeps from 10 Hz to 2,000 Hz to 10 Hz must be applied to the transducer at a rate of 1 octave per minute, repeated for each of the 3 major axes; and (ii) The measurement of the transducer's output during this test is unnecessary. (3) A final resonance test must be conducted under paragraph (f)(1) of this section. § 3175.134 Transducer test reporting. (a) Each test required by §§ 3175.131 through 3175.133 must be fully documented by the test facility performing the tests. The report must indicate the results for each required test and include all data points recorded. (b) The report must be submitted to the PMT. If the PMT determines that all testing was completed as required by §§ 3175.131 through 3175.133, it will make a recommendation that the BLM approve the transducer make, model, and range, along with the reference uncertainty, influence effects, and any operating restrictions, and posts them to the BLM's website at www.blm.gov § 3175.135 Uncertainty determination. (a) Reference uncertainty calculations for each transducer of a given make, model, URL, and turndown must be determined as follows (the result for each transducer is denoted by the subscript i): (1) Maximum error E i (2) Hysteresis H i (3) Repeatability R i (b) Reference uncertainty of a transducer. r,i Where E i i i (c) Reference uncertainty for the make, model, URL, and turndown of a transducer (U r U r s t dist Where: s r,i t dist (d) Influence effects. (1) Zero-based errors of each transducer. Where: subscript i represents the results for each transducer tested of a given make, model, URL, and turndown subscript n represents the results for each influence effect test required under § 3175.133 E zero,n,i M n e.g., And: D Z n,i Z n,i Z ref ,i Where: Z n,i Z ref,i (2) Span-based errors of each transducer. Where: E span,n,i S n,i (3) Zero- and span-based errors due to influence effects for a make, model, URL, and turndown of a transducer must be determined as follows: E z,n s z,n t dist E s,n s s,n t dist Where: E z,n E s,n s z,n s s,n t dist § 3175.140 Flow-computer software testing. The BLM will approve a particular version of flow-computer software for use in a specific make and model of flow computer only if the testing performed on the software meets all of the standards and requirements in §§ 3175.141 through 3175.144. Type-testing is required for each software version that affects the calculation of flow rate, volume, heating value, live input variable averaging, flow time, or the integral value. Software updates or changes that do not affect these items do not require BLM approval. § 3175.141 General requirements for flow-computer software testing. (a) Test facility. (b) Selection of flow-computer software to be tested. (2) Each software version must have a unique identifier. (c) Testing method. (1) Applied directly to the hardware registers; or (2) Applied physically to a transducer. If input variables are applied physically to a transducer, the values received by the hardware registers from the transducer must be recorded. (d) Pass-fail criteria. (2) The software under test may be used at an FMP only if the difference between all values calculated by the software version under test and the reference software is less than 50 parts per million (0.005 percent) and the results of the tests required in §§ 3175.142 and 3175.143 are satisfactory to the PMT. If the test results are satisfactory, the BLM will identify the software version tested as acceptable for use on its website at www.blm.gov § 3175.142 Required static tests. (a) Instantaneous flow rate. (b) Sums and averages. (2) At the conclusion of the 24-hour period, the following hourly and daily values must meet the criteria in § 3175.141(d): (i) Volume; (ii) Integral value; (iii) Flow time; (iv) Average differential pressure; (v) Average static pressure; and (vi) Average flowing temperature. (c) Other tests. (1) Each parameter of the configuration log must be changed to ensure the event log properly records the changes according to the variables listed in § 3175.104(c); and (2) Inputs simulating a 15 percent and 150 percent over-range of the differential and static-pressure transducer's calibrated span must be entered to verify that the over-range condition triggers an alarm or an entry in the event log. § 3175.143 Required dynamic tests. (a) Square wave test. (1) Differential pressure. (2) Static pressure. (3) Temperature. (4) At the conclusion of the 1-hour period, the following hourly values must meet the criteria in § 3175.141(d): (i) Volume; (ii) Integral value; (iii) Flow time; (iv) Average differential pressure; (v) Average static pressure; and (vi) Average flowing temperature. (b) Sawtooth test. (1) Differential pressure. (2) Static pressure. (3) Temperature. (4) At the conclusion of the 24-hour period, the following hourly and daily values must meet the criteria in § 3175.141(d): (i) Volume; (ii) Integral value; (iii) Flow time; (iv) Average differential pressure; (v) Average static pressure; and (vi) Average flowing temperature. (c) Random test. (1) Differential pressure. (2) Static pressure. (3) Temperature. (4) At the conclusion of the 24-hour period, the following hourly values must meet the criteria in § 3175.141(d): (i) Volume; (ii) Integral value; (iii) Flow time; (iv) Average differential pressure; (v) Average static pressure; and (vi) Average flowing temperature. (d) Long-term volume accumulation test. (2) At the end of the 7-day test period, the accumulated volume must meet the criteria in § 3175.141(d). § 3175.144 Flow-computer software test reporting. (a) The test facility performing the tests must fully document each test required by §§ 3175.141 through 3175.143. The report must indicate the results for each required test and include all data points recorded. (b) The report must be submitted to the AO by the operator or the manufacturer. If the PMT determines all testing was completed as required by this section, it will make a recommendation that the BLM approve the software version and post it on the BLM's website at www.blm.gov § 3175.150 Immediate assessments. (a) Certain instances of noncompliance warrant the imposition of immediate assessments upon discovery. Imposition of any of these assessments does not preclude other appropriate enforcement actions. (b) The BLM will issue the assessments for the violations listed as follows: Appendix A to Subpart 3175 of Part 3170—Table of Atmospheric Pressures Subpart 3176—Onshore Oil and Gas Production: Hydrogen Sulfide Operations Authority: 25 U.S.C. 396d and 2107; 30 U.S.C. 189, 306, 359, and 1751; and 43 U.S.C. 1732(b), 1733, and 1740. Source: 88 FR 39540, June 16, 2023, unless otherwise noted. § 3176.1 Authority. This subpart is established pursuant to the authority granted to the Secretary of the Interior through various Federal and Indian mineral leasing statutes and the Federal Oil and Gas Royalty Management Act of 1982. This authority has been delegated to the Bureau of Land Management and is implemented by the onshore oil and gas operating regulations contained in 43 CFR part 3160. More specifically, this subpart implements and supplements the provisions of 43 CFR 3162.1, 3162.5-1(a), (c), and (d), 3162.5-2(a), and 3162.5-3. § 3176.2 Purpose. The purpose of this subpart is to protect public health and safety and those personnel essential to maintaining control of the well. This subpart identifies the Bureau of Land Management's uniform national requirements and minimum standards of performance expected from operators when conducting operations involving oil or gas that is known or could reasonably be expected to contain hydrogen sulfide (H 2 2 2 § 3176.3 Scope. (a) This subpart is applicable to all onshore Federal and Indian (except Osage Tribe) oil and gas leases when drilling, completing, testing, reworking, producing, injecting, gathering, storing, or treating operations are being conducted in zones which are known or could reasonably be expected to contain H 2 2 2 (b) The requirements and minimum standards in this subpart do not relieve an operator from compliance with any applicable Federal, State, or local requirement(s) regarding H 2 2 § 3176.4 Definitions. As used in this subpart, the term: Authorized officer Christmas tree Dispersion technique 2 Escape rate (1) For a production facility, the escape rate shall be calculated using the maximum daily rate of gas produced through that facility or the best estimate thereof; (2) For gas wells, the escape rate shall be calculated by using the current daily absolute open-flow rate against atmospheric pressure; (3) For oil wells, the escape rate shall be calculated by multiplying the producing gas/oil ratio by the maximum daily production rate or best estimate thereof; or (4) For a well being drilled in a developed area, the escape rate may be determined by using the offset wells completed in the interval(s) in question. Essential personnel Exploratory well Gas well H 2 S Drilling Operations Plan 2 2. Lessee Major violation Minor violation Oil well Operating rights owner Operator Potentially hazardous volume 2 2 2 Production facilities Prompt correction Public Protection Plan 2 2. Radius of exposure (1) For determining the 100 ppm radius of exposure where the H 2 X = [1.589)(H 2 (0.6258) (2) For determining the 500 ppm radius of exposure where the H 2 X = [(0.4546)(H 2 (0.6258) Where: X = radius of exposure in feet; H 2 2 Q = maximum volume of gas determined to be available for escape in cubic feet per day (at standard conditions of 14.73 psia and 60 °F). (3) For determining the 100 ppm or the 500 ppm radius of exposure in gas streams containing H 2 (4) Where multiple H 2 i.e., (5) For a well being drilled in an area where insufficient data exits to calculate a radius of exposure, but where H 2 Zones known not to contain H 2 S 2 2 Zones known to contain H 2 S 2 2 Zones which can reasonably be expected to contain H 2 S 2 Zones which cannot reasonably be expected to contain H 2 S 2 § 3176.5 Requirements. The requirements of this subpart are the minimum acceptable standards with regard to H 2 § 3176.6 Applications, approvals, and reports. (a) Drilling. 2 2 2 2 (b) Drilling plan. 2 2 (1) Statement that all personnel shall receive proper H 2 (2) A legible well site diagram of accurate scale (may be included as part of the well site layout as required by subpart 3171 of this part) showing the following: (i) Drill rig orientation; (ii) Prevailing wind direction; (iii) Terrain of surrounding area; (iv) Location of all briefing areas (designate primary briefing area); (v) Location of access road(s) (including secondary egress); (vi) Location of flare line(s) and pit(s); (vii) Location of caution and/or danger signs; and (viii) Location of wind direction indicators. (3) As required by this subpart, a complete description of the following H 2 (i) Well control equipment. (B) Remote controlled choke; (C) Flare gun/flares; and (D) Mud-gas separator and rotating head (if exploratory well); (ii) Protective equipment for essential personnel. (B) Means of communication when using protective breathing apparatus; (iii) H 2 S detection and monitoring equipment. 2 (B) Portable H 2 2 (iv) Visual warning systems. (v) Mud program. (vi) Metallurgy. 2 (vii) Communication. (4) Plans for well testing. (c) Production. 2 Table 1 to § 3176.6( c Violation Corrective action Normal abatement period Minor for failure to submit required information Submit required information (radii of exposure and/or complete Public Protection Plan) 20 to 40 days. (2) The operator shall initially test the H 2 Table 2 to § 3176.6( c Violation Corrective action Normal abatement period Minor Test gas from well or production facility 20 to 40 days. (3) If operational or production alterations result in a 5 percent or more increase in the H 2 i.e., Table 3 to § 3176.6( c Violation Corrective action Normal abatement period Minor Submit information to authorized officer 20 to 40 days. (d) Plans and reports. 2 Table 4 to § 3176.6( d Violation Corrective action Normal abatement period Minor Submit information to authorized officer 20 to 40 days. (2) Any release of a potentially hazardous volume of H 2 Table 5 to § 3176.6( d Violation Corrective action Normal abatement period Minor Report undesirable event to the authorized officer 24 hours. § 3176.7 Public protection. (a) Applicability criteria. 2 (1) The 100 ppm radius of exposure is greater than 50 feet and includes any occupied residence, school, church, park, school bus stop, place of business, or other areas where the public could reasonably be expected to frequent; (2) The 500 ppm radius of exposure is greater than 50 feet and includes any part of a Federal, State, County, or municipal road or highway owned and principally maintained for public use; or (3) The 100 ppm radius of exposure is equal to or greater than 3,000 feet where facilities or roads are principally maintained for public use. Additional specific requirements for drilling/completion/workover or producing operations are described in §§ 3176.8 and 3176.9, respectively. (b) Public Protection Plan Plan submission/implementation/availability. 2 (ii) The Public Protection Plan shall be activated immediately upon detection of release of a potentially hazardous volume of H 2 Table 1 to § 3176.7 (b)(1)(ii) Violation Corrective action Normal abatement period Major Immediate implementation of the Public Protection Plan Prompt correction required. (iii) A copy of the Public Protection Plan shall be available at the drilling/completion site for such wells and at the facility, field office, or with the pumper, as appropriate, for producing wells, facilities, and during workover operations. Table 2 to § 3176.7 (b)(1)(iii) Violation Corrective action Normal abatement period Minor Make copy of Plan available 24 hours (drilling/completion/workover), 5 to 7 days (production). (2) Plan content. (ii) The Public Protection Plan shall include: (A) The responsibilities and duties of key personnel, and instructions for alerting the public and requesting assistance; (B) A list of names and telephone numbers of residents, those responsible for safety of public roadways, and individuals responsible for the safety of occupants of buildings within the 100 ppm radius of exposure ( e.g., 2 (C) A telephone call list (including telephone numbers) for requesting assistance from law enforcement, fire department, and medical personnel and Federal and State regulatory agencies, as required. Necessary information to be communicated and the emergency responses that may be required shall be listed. This information shall be based on previous contacts with these organizations; (D) A legible 100 ppm (or 3,000 feet, if conditions unknown) radius plat of all private and public dwellings, schools, roads, recreational areas, and other areas where the public might reasonably be expected to frequent; (E) Advance briefings, by visit, meeting, or letter to the people identified in paragraph (b)(2)(ii)(B) of this section, including: ( 1 2 2 ( 2 ( 3 2 2 ( 4 ( 5 ( 6 (F) Guidelines for the ignition of the H 2 (G) Additional measures necessary following the release of H 2 2 ( 1 2 2 ( 2 ( 3 ( 4 (H) For production facilities, a description of the detection system(s) utilized to determine the concentration of H 2 § 3176.8 Drilling/completion/workover requirements. (a) General. 2 i.e., 2 Table 1 to § 3176.8 (a)(1) Violation Corrective action Normal abatement period Minor Make copy of Plan available 24 hours. (2) Initial H 2 2 2 2 Table 2 to § 3176.8 (a)(2) Violation Corrective action Normal abatement period Major Implement H 2 Prompt correction required. (3) If H 2 (i) The operator shall immediately ensure control of the well, suspend drilling ahead operations (unless detrimental to well control), and obtain materials and safety equipment to bring the operations into compliance with the applicable provisions of this subpart. Table 3 to § 3176.8 (a)(3)(i) Violation Corrective action Normal abatement period Major Implement H 2 Prompt correction required. (ii) The operator shall notify the authorized officer of the event and the mitigating steps that have or are being taken as soon as possible, but no later than the next business day. If said notification is subsequent to actual resumption of drilling operations, the operator shall notify the authorized officer of the date that drilling was resumed no later than the next business day. Table 4 to § 3176.8 (a)(3)(ii) Violation Corrective action Normal abatement period Minor Notify authorized officer 24 hours. (iii) It is the operator's responsibility to ensure that the applicable requirements of this subpart have been met prior to the resumption of drilling ahead operations. Drilling ahead operations will not be suspended pending receipt of a written H 2 Table 5 to § 3176.8 (a)(3)(iii) Violation Corrective action Normal abatement period Minor Submit plans to authorized officer 5 days. (b) Locations. Table 6 to § 3176.8 (b)(1) Violation Corrective action Normal abatement period Minor Designate or establish an alternate escape route 24 hours. (2) The alternate escape route shall be kept passable at all times. Table 7 to § 3176.8 (b)(2) Violation Corrective action Normal abatement period Minor Make alternate escape route passable 24 hours. (3) For workovers, a secondary means of egress shall be designated. Table 8 to § 3176.8 (b)(3) Violation Corrective action Normal abatement period Minor Designate secondary means of egress 24 hours. (c) Personnel protection Training program. 2 i.e., 2 2 Table 9 to § 3176.8 (c)(1) Violation Corrective action Normal abatement period Major Train all personnel and conduct drills Prompt correction required. (i) All training sessions and drills shall be recorded on the driller's log or its equivalent. Table 10 to § 3176.8 (c)(1)(i) Violation Corrective action Normal abatement period Minor Record on driller's log or equivalent 24 hours. (ii) For drilling/completion/workover wells, at least 2 briefing areas shall be designated for assembly of personnel during emergency conditions, located a minimum of 150 feet from the well bore, and 1 of the briefing areas shall be upwind of the well at all times. The briefing area located most normally upwind shall be designated as the “primary briefing area.” Table 11 to § 3176.8 (c)(1)(ii) Violation Corrective action Normal abatement period Major Designate briefing areas 24 hours. (iii) One person (by job title) shall be designated and identified to all on-site personnel as the person primarily responsible for the overall operation of the on-site safety and training programs. Table 12 to § 3176.8 (c)(1)(iii) Violation Corrective action Normal abatement period Minor Designate safety responsibilities 24 hours. (2) Protective equipment. 2 2 Table 13 to § 3176.8 (c)(2)(i) Violation Corrective action Normal abatement period Major Acquire, repair, or replace equipment, as necessary Prompt correction required. (ii) Storage and maintenance of protective breathing apparatus shall be planned to ensure that at least 1 working apparatus per person is readily available for all essential personnel. Table 14 to § 3176.8 (c)(2)(ii) Violation Corrective action Normal abatement period Major Acquire or rearrange equipment, as necessary Prompt correction required. (iii) The following additional safety equipment shall be available for use: (A) Effective means of communication when using protective breathing apparatus; (B) Flare gun and flares to ignite the well; and (C) Telephone, radio, mobile phone, or any other device that provides communication from a safe area at the rig location, where practical. Table 15 to § 3176.8 (c)(2)(iii) Violation Corrective action Normal abatement period Major Acquire, repair, or replace equipment 24 hours. (3) H 2 S detection and monitoring equipment. 2 2 2 Table 16 to § 3176.8 (c)(3)(i) Violation Corrective action Normal abatement period Major Install, repair, calibrate, or replace equipment, as necessary Prompt correction required. (ii) All tests of the H 2 Table 17 to § 3176.8 (c)(3)(ii) Violation Corrective action Normal abatement period Minor Record on driller's log or equivalent 24 hours. (iii) For workover operations, 1 operational sensing point shall be located as close to the wellbore as practical. Additional sensing points may be necessary for large and/or long-term operations. Table 18 to § 3176.8 (c)(3)(iii) Violation Corrective action Normal abatement period Major Install, repair, calibrate, or replace equipment, as necessary Prompt correction required. (4) Visible warning system. i.e., i.e., Table 19 to § 3176.8 (c)(4)(i) Violation Corrective action Normal abatement period Minor Install, repair, move, or replace wind direction indicator(s), as necessary 24 hours. (ii) At any time when the terms of this subpart are in effect, operational danger or caution sign(s) shall be displayed along all controlled accesses to the site. Table 20 to § 3176.8 (c)(4)(ii) Violation Corrective action Normal abatement period Minor Erect appropriate signs 24 hours. (iii) Each sign shall be painted a high visibility red, black and white, or yellow with black lettering. Table 21 to § 3176.8 (c)(4)(iii) Violation Corrective action Normal abatement period Minor Replace or alter sign, as necessary 5 to 20 days. (iv) The sign(s) shall be legible and large enough to be read by all persons entering the well site and be placed a minimum of 200 feet but no more than 500 feet from the well site and at a location which allows vehicles to turn around at a safe distance prior to reaching the site. Table 22 to § 3176.8 (c)(4)(iv) Violation Corrective action Normal abatement period Major Replace, alter, or move sign, as necessary 24 hours. (v) The sign(s) shall read: “DANGER—POISON GAS—HYDROGEN SULFIDE,” and in smaller lettering: “Do Not Approach If Red Flag is Flying” or equivalent language if approved by the authorized officer. Where appropriate, bilingual or multilingual danger sign(s) shall be used. Table 23 to § 3176.8 (c)(4)(v) Violation Corrective action Normal abatement period Minor Alter sign(s), as necessary 5 to 20 days. (vi) All sign(s) and, when appropriate, flag(s) shall be visible to all personnel approaching the location under normal lighting and weather conditions. Table 24 to § 3176.8 (c)(4)(vi) Violation Corrective action Normal abatement period Major Erect or move sign(s) and/or flag(s), as necessary 24 hours. (vii) When H 2 Table 25 to § 3176.8 (c)(4)(vii) Violation Corrective action Normal abatement period Major Display red flag Prompt correction required. (5) Warning system response. 2 i.e., Table 26 to § 3176.8 (c)(5) Violation Corrective action Normal abatement period Major Move non-essential personnel to safe area and mask-up essential personnel Prompt correction required. (d) Operating procedures and equipment General/operations. 2 (i) If zones containing in excess of 100 ppm of H 2 Table 27 to § 3176.8 (d)(1)(i) Violation Corrective action Normal abatement period Major Convert to appropriate fluid medium Prompt correction required. (ii) A flare system shall be designed and installed to safely gather and burn H 2 Table 28 to § 3176.8 (d)(1)(ii) Violation Corrective action Normal abatement period Major Install flare system Prompt correction required. (iii) Flare lines shall be located as far from the operating site as feasible and in a manner to compensate for wind changes. The flare line(s) mouth(s) shall be located not less than 150 feet from the wellbore unless otherwise approved by the authorized officer. Flare lines shall be straight unless targeted with running tees. Table 29 to § 3176.8 (d)(1)(iii) Violation Corrective action Normal abatement period Minor Adjust flare line(s) as necessary 24 hours. (iv) The flare system shall be equipped with a suitable and safe means of ignition. Table 30 to § 3176.8 (d)(1)(iv) Violation Corrective action Normal abatement period Major Install, repair, or replace equipment, as necessary 24 hours. (v) Where noncombustible gas is to be flared, the system shall be provided supplemental fuel to maintain ignition. Table 31 to § 3176.8 (d)(1)(v) Violation Corrective action Normal abatement period Major Acquire supplemental fuel 24 hours. (vi) At any wellsite where SO 2 2 2 2 Table 32 to § 3176.8 (d)(1)(vi) Violation Corrective action Normal abatement period Minor Acquire, repair, or replace equipment as necessary 24 hours to 3 days. (vii) If the flare impact area reaches a sustained ambient threshold level of 2 ppm or greater of SO 2 Table 33 to § 3176.8 (d)(1)(vii) Violation Corrective action Normal abatement period Major Contain SO 2 Prompt correction required. (viii) A remote controlled choke shall be installed for all H 2 Table 34 to § 3176.8 (d)(1)(viii) Violation Corrective action Normal abatement period Major Install, repair, or replace equipment, as necessary Prompt correction required. (ix) Mud-gas separators and rotating heads shall be installed and operable for all exploratory wells. Table 35 to § 3176.8 (d)(1)(ix) Violation Corrective action Normal abatement period Major Install, repair, or replace equipment, as necessary Prompt correction required. (2) Mud program. 2 Table 36 to § 3176.8 (d)(2)(i) Violation Corrective action Normal abatement period Major Adjust pH Prompt correction required. (ii) Drilling mud containing H 2 Table 37 to § 3176.8 (d)(2)(ii) Violation Corrective action Normal abatement period Major Install, repair, or replace equipment, as necessary 24 hours. (iii) Sufficient quantities of mud additives shall be maintained on location to scavenge and/or neutralize H 2 Table 38 to § 3176.8 (d)(2)(iii) Violation Corrective action Normal abatement period Major Obtain proper mud additives 24 hours. (3) Metallurgical equipment. 2 2 (ii) To minimize stress corrosion cracking and/or H 2 2 2 2 2 Table 39 to § 3176.8 (d)(3)(ii) Violation Corrective action Normal abatement period Major Install, repair, or replace appropriate equipment, as necessary Prompt correction required. (4) Well testing in an H 2 S environment. 2 Table 40 to § 3176.8 (d)(4) Violation Corrective action Normal abatement period Major Terminate the well test Prompt correction required. § 3176.9 Production requirements. (a) General. Table 1 to § 3176.9 (a)(1) Violation Corrective action Normal abatement period Minor Bring facility into compliance 60 days. (2) Production facilities constructed after January 22, 1991, shall be designed, constructed, and operated to meet the requirements and minimum standards set forth in this section. Any variations from the standards or established time frames shall be approved by the authorized officer in accordance with the provisions of § 3176.10. Except for storage tanks, a determination of the radius of exposure for all production facilities shall be made in the manner prescribed in § 3176.4. Table 2 to § 3176.9 (a)(2) Violation Corrective action Normal abatement period Minor Bring facility into compliance 60 days. (3) At any production facility or storage tank(s) where the sustained ambient H 2 Table 3 to § 3176.9 (a)(3) Violation Corrective action Normal abatement period Major, if the authorized officer determines that a health or safety problem to the public is imminent, otherwise minor Bring facility into compliance 3 days for major, 30 days for minor. (b) Storage tanks. 2 (1) No determination of a radius of exposure need be made for storage tanks. (2) All stairs/ladders leading to the top of storage tanks shall be chained and/or marked to restrict entry. For any storage, tank(s) which require fencing (see paragraph (b)(6) of this section), a danger sign posted at the gate(s) shall suffice in lieu of this requirement. Table 4 to § 3176.9 (b)(2) Violation Corrective action Normal abatement period Minor Chain or mark stair(s)/ladder(s) or post sign, as necessary 5 to 20 days. (3) A danger sign shall be posted on or within 50 feet of the storage tank(s) to alert the public of the potential H 2 Table 5 to § 3176.9 (b)(3) Violation Corrective action Normal abatement period Minor Post or move sign(s), as necessary 5 to 20 days. (4) The sign(s) shall be painted in high-visibility red, black, and white. The sign(s) shall read: “DANGER—POISON GAS—HYDROGEN SULFIDE” or equivalent language if approved by the authorized officer. Where appropriate, bilingual or multilingual warning signs shall be used. Table 6 to § 3176.9 (b)(4) Violation Corrective action Normal abatement period Minor Post, move, replace, or alter sign(s), as necessary 20 to 40 days. (5) At least 1 permanent wind direction indicator shall be installed so that wind direction can be easily determined at or approaching the storage tank(s). Table 7 to § 3176.9 (b)(5) Violation Corrective action Normal abatement period Minor Install, repair, or replace wind direction indicator, as necessary 20 to 40 days. (6) A minimum 5-foot chain-link, 5-strand barbed wire, or comparable type fence and gate(s) that restrict(s) public access shall be required when storage tanks are located within 1/4 1/4 Table 8 to § 3176.9 (b)(6) Violation Corrective action Normal abatement period Minor Install, repair, or replace fence and/or gate(s), as necessary 20 to 40 days. (7) Gate(s), as required by paragraph (b)(6) of this section, shall be locked when unattended by the operator. Table 9 to § 3176.9 (b)(7) Violation Corrective action Normal abatement period Minor Lock gate 24 hours. (c) Production facilities. 2 (1) Danger signs as specified in paragraph (b)(4) of this section shall be posted on or within 50 feet of each production facility to alert the public of the potential H 2 Table 10 to § 3176.9 (c)(1) Violation Corrective action Normal abatement period Minor Post, move, or alter sign(s), as necessary 5 to 20 days. (2) Danger signs, as specified in paragraph (b)(4) of this section, shall be required for well flowlines and lease gathering lines that carry H 2 Table 11 to § 3176.9 (c)(2) Violation Corrective action Normal abatement period Minor Post, move, or alter sign(s), as necessary 5 to 20 days. (3) Fencing and gate(s), as specified in paragraph (b)(6) of this section, shall be required when production facilities are located within 1/4 1/4 Table 12 to § 3176.9 (c)(3) Violation Corrective action Normal abatement period Minor Install, repair, or replace fence, and/or gate(s), as necessary 20 to 40 days. (4) Gate(s), as required by paragraph (c)(3) of this section, shall be locked when unattended by the operator. Table 13 to § 3176.9 (c)(4) Violation Corrective action Normal abatement period Minor Lock gate 24 hours. (5) Wind direction indicator(s) as specified in paragraph (b)(5) of this section shall be required. In the event the storage tanks and production facilities are located at the same site, 1 such indicator shall suffice. Flowlines are exempt from this requirement. Table 14 to § 3176.9 (c)(5) Violation Corrective action Normal abatement period Minor Install, repair, or replace wind direction indicator(s), as necessary 20 to 40 days. (6) All wells, unless produced by artificial lift, shall possess a secondary means of immediate well control through the use of appropriate christmas tree and/or downhole completion equipment. Such equipment shall allow downhole accessibility (reentry) under pressure for permanent well control operations. If the applicability criteria stated in § 3176.7(a) are met, a minimum of 2 master valves shall be installed. Table 15 to § 3176.9 (c)(6) Violation Corrective action Normal abatement period Minor Install, repair, or replace equipment, as necessary 20 to 40 days. (7) All equipment shall be chosen with consideration for both the H 2 2 Table 16 to § 3176.9 (c)(7) Violation Corrective action Normal abatement period Minor Install, repair, or replace equipment, as necessary 20 to 40 days. (8) Where the 100 ppm radius of exposure for H 2 Table 17 to § 3176.9 (c)(8) Violation Corrective action Normal abatement period Minor Install, repair, or replace equipment, as necessary 20 to 40 days. (9) The automatic safety valves or shutdowns, as required by paragraph (c)(8) of this section, shall be set to activate upon a release of a potentially hazardous volume of H 2 Table 18 to § 3176.9 (c)(9) Violation Corrective action Normal abatement period Major Repair, replace or adjust equipment, as necessary Prompt correction required. (10) If the sustained ambient concentration of H 2 2 2 2 Table 19 to § 3176.9 (c)(10) Violation Corrective action Normal abatement period Major Repair facility to bring into compliance. Prompt correction required (d) Public protection. Table 20 to § 3176.9 (d) Violation Corrective action Normal abatement period Minor Submit Public Protection Plan 20 to 40 days. § 3176.10 Variances from requirements. An operator may request the authorized officer to approve a variance from any of the requirements prescribed in §§ 3176.5 through 3176.9. All such requests shall be submitted in writing to the appropriate authorized officer and provide information as to the circumstances which warrant approval of the variance(s) requested and the proposed alternative methods by which the related requirement(a) of minimum standard(s) are to be satisfied. The authorized officer, after considering all relevant factors, may approve the requested variance(s) if it is determined that the proposed alterative(s) meets or exceeds the objectives of the applicable requirement(s) or minimum standard(s). § 3176.11 Incorporation by reference. Certain material is incorporated by reference into this subpart with the approval of the Director of the Federal Register under 5 U.S.C. 552(a) and 1 CFR part 51. All approved incorporation by reference (IBR) material is available for inspection at all Bureau of Land Management offices with jurisdiction over oil and gas activities, and at the National Archives and Records Administration (NARA). Contact the BLM at: Office of Energy, Minerals, and Realty Management, 1849 C Street Northwest, Washington, DC 20240; telephone 202-208-3801; email [email protected]; www.blm.gov/programs/energy-and-minerals/oil-and-gas. www.archives.gov/federal-register/cfr/ibr-locations.html [email protected]. (a) American National Standards Institute (ANSI), [email protected]; www.ansi.org. (1) ANSI Standard Z88.2-1992 for Respiratory Protection, Approved August 6, 1992 (“ANSI Z88.2-1992”), IBR approved for § 3176.8. (2) [Reserved] Note 1 to paragraph (a): If ANSI Z88.2 is not available from document resellers, contact the BLM to obtain a copy. (b) American Petroleum Institute (API), [email protected]; www.api.org. (1) API Recommended Practice 49—Recommended Practice for Drilling and Well Servicing Operations Involving Hydrogen Sulfide; Third Edition, May 2001; Reaffirmed, January 2013 (“API RP 49”), IBR approved for § 3176.8. (2) [Reserved] (c) Association for Materials Protection and Performance (AMPP) www.ampp.org. (1) ANSI/NACE MR0175-2021/ISO 15156-1:2020; Petroleum and natural gas industries—Materials for use in H 2 (2) [Reserved] Subpart 3177—Onshore Oil and Gas Production: Disposal of Produced Water Source: 88 FR 39540, June 16, 2023, unless otherwise noted. § 3177.1 Authority. This subpart is established pursuant to the authority granted to the Secretary of the Interior by various Federal and Indian mineral leasing statutes and the Federal Oil and Gas Royalty Management Act of 1982. Said authority has been delegated to the Bureau of Land Management and is implemented by the onshore oil and gas operating regulations contained in 43 CFR part 3160. As directed by the Federal Onshore Oil and Gas Leasing Reform Act of 1987, for National Forest lands the Secretary of Agriculture shall regulate all surface-disturbing activities and shall determine reclamation and other actions required in the interest of conservation of surface resources. Specific authority for the provisions contained in this subpart is found at 43 CFR 3162.3 and 3162.5 and 43 CFR part 3160, subpart 3163. § 3177.2 Purpose. This subpart supersedes Notice to Lessees and Operators of Federal and Indian Oil and Gas Leases (NTL-2B), Disposal of Produced Water. The purpose of this subpart is to specify informational and procedural requirements for submittal of an application for the disposal of produced water, and the design, construction, and maintenance requirements for pits as well as the minimum standards necessary to satisfy the requirements and procedures for seeking a variance from the minimum standards. Also set forth in this subpart are certain specific acts of noncompliance, corrective actions required, and the abatement period allowed for correction. § 3177.3 Scope. This subpart is applicable to disposal of produced water from completed wells on Federal and Indian (except Osage) oil and gas leases. It does not apply to approval of disposal facilities on lands other than Federal and Indian lands. Separate approval under this subpart is not required if the method of disposal has been covered under an enhanced recovery project approved by the authorized officer. § 3177.4 Definitions. As used in this subpart, the term: Authorized officer Federal lands Free-board Injection well Lease Lessee Lined pit Major violation Minor violation Natural Pollutant Discharge Elimination System (NPDES) Operator Produced water Toxic constituents Underground Injection Control (UIC) program Unlined pit § 3177.5 Requirements. (a) General requirements. (b) Temporary disposal. (c) Approval timeline. (i) Approve the application as submitted or with appropriate modification or conditions; (ii) Return the application and advise the applicant in writing of the reasons for disapproval; or (iii) Advise the applicant in writing of the reasons for delay and the excepted final action date. (2) If the approval for a disposal facility, e.g., § 3177.6 Application and approval authority. (a) On-lease disposal. (1) Disposal of water in injection wells. (2) Disposal of water in pits. (b) Off-lease disposal On leased or unleased Federal/Indian lands. (i) Disposal of water in injection wells. (ii) Disposal of water in pits. (iii) Right-of-way procedures. e.g., (2) Disposal of water on State and privately owned lands Disposal of water in injection wells. (ii) Disposal of water in pits. (iii) Right-of-way procedures. § 3177.7 Informational requirements for injection wells. For an injection well proposed on Federal or Indian leases, the operator shall obtain an Underground Injection Control (UIC) permit pursuant to 40 CFR parts 144 and 146 from the Environmental Protection Agency or the State/Tribe where the State/Tribe has achieved primacy. The operator shall also comply with the pertinent procedural and informational requirements for Application for Permit to Drill or Sundry Notice as set forth in subpart 3171 of this part. The injection well shall be designed and drilled or conditioned in accordance with the requirements and standards described in subpart 3172 of this part and pertinent NTLs, as well as the UIC permit. § 3177.8 Informational requirements for pits. Operators who request approval for disposal of produced water into a lined or unlined pit shall file an application on a Sundry Notice, Form 3160-5, and identify the operator's field representative by name, address, and telephone number and the source of the produced water. Sources of produced water shall be identified by facility, lease number, well number and name, and legal description of well location. All samples for water analysis shall be taken at the current discharge a point. A reclamation plan detailing the procedures expected to be followed for closure of the pit and the contouring and revegetating of the site shall be submitted prior to pit abandonment. If requested by the authorized officer, a contingency plan to deal with specific anticipated emergency situations shall be submitted as provided for in 43 CFR 3162.5-1(d). (a) Lined pits. (1) A map and drawings of the site on a suitable scale that show the pit dimension, cross section, side slopes, leak detection system, and location relative to other site facilities; (2) The daily quantity of water to be disposed of (maximum daily quantity shall be cited if major fluctuations are anticipated) and a water analysis (unless waived by the authorized officer as unnecessary) that includes the concentrations of chlorides, sulfates, pH, total dissolved solids (TDS), and toxic constituents that the authorized officer reasonably believes to be present; (3) Criteria used to determine the pit size, which includes a minimum of 2 feet of free-board; (4) The average monthly evaporation and average monthly precipitation for the area; (5) The method and schedule for periodic disposal of precipitated solids and a copy of the appropriate disposal permit, if any; and (6) The type, thickness, and life span of material to be used for lining the pit and the method of installation. The manufacturer's guidebook and information for the product shall be included, if available. (b) Unlined pits. (i) The water to be disposed of has an annual average TDS concentration equal to or less than that of the existing water to be protected, provided that the level of any toxic constituents in the produced water does not exceed established State or Federal standards for protection of surface and/or ground water; (ii) All, or a substantial part, of the produced water is being used for beneficial purposes and meets minimum water quality standards for such uses. For example, uses of produced water for purposes such as irrigation and livestock or wildlife watering shall be considered as beneficial; (iii)(A) The water to be disposed of will not degrade the quality of surface or subsurface waters in the area; (B) The surface and subsurface waters contain TDS above 10,000 ppm, or toxic constituents in high concentrations; or (C) The surface and subsurface waters are of such poor quality or small quantity as to eliminate any practical use thereof; and (iv) That the volume of water to be disposed of per disposal facility does not exceed an average of 5 barrels per day on a monthly basis. (2) Operators applying for disposal into an unlined pit shall also submit the following information, as appropriate: (i) Applications for disposal into unlined pits that meet the criteria in paragraphs (b)(1)(i) through (iv) of this section shall include: (A) A map and drawings of the site on a suitable scale that show the pit dimension, cross section, side slopes, size, and location relative to other site facilities; (B) The daily quantity of water to be disposed of and a water analysis that includes total dissolved solids (in ppm), pH, oil and grease content, the concentrations of chlorides and sulfates, and other parameters or constituents toxic to animal or plant life as reasonably prescribed by the authorized officer. The applicant should also indicate any effect or interaction of produced water with any water resources present at or near the surface and other known mineral deposits. For applications submitted under criterion in paragraph (b)(1)(iv) of this section, the water quality analysis is not needed unless requested by the authorized officer; (C) The average monthly evaporation and the average monthly precipitation for the area. For applications submitted under criterion in paragraph (b)(1)(iv) of this section, average annual data will be acceptable; (D) The estimated percolation rate based on soil characteristics under and adjacent to the pit. In some cases the authorized officer may require percolation tests using accepted test procedures; and (E) Estimated depth and areal extent of the shallowest known aquifer with TDS less than 10,000 ppm, and the depth and extent of any known mineral deposits in the area. (ii) Where beneficial use (criterion in paragraph (b)(1)(ii) of this section) is the basis for the application, the justification submitted shall also contain written confirmation from the user(s). (iii) If the application is made on the basis that surface and subsurface waters will not be adversely affected by disposal in an unlined pit (paragraph (b)(1)(iii) of this section), the justification shall also include the following additional information: (A) Map of the site showing the location of surface waters, water wells, and existing water disposal facilities within 1 mile of the proposed disposal facility; (B) Average concentration of TDS (in ppm) of all surface and subsurface waters within the 1-mile radius that might be affected by the proposed disposal; (C) Reasonable geologic and hydrologic evidence that shows the proposed disposal method will not adversely affect existing water quality or major uses of such waters, and identifies the presence of any impermeable barrier(s), as necessary; and (D) A copy of any State order or other authorization granted as a result of a public hearing that is pertinent to the authorized officer's consideration of the application. (c) Emergency pits. § 3177.9 Design requirements for pits. (a) Pits shall be designed to meet the following requirements and minimum standards. For unlined pits approved under criterion in § 3177.8(b)(1)(iv), requirements in paragraphs (a)(4) and (5) of this section, do not apply. (1) As much as practical, the pit shall be located on level ground and away from established drainage patterns, including intermittent/ephemeral drainage ways, and unstable ground or depressions in the area. (2) The pit shall have adequate storage capacity for safe containment of all produced water, even in those periods when evaporation rates are at a minimum. The design shall provide for a minimum of 2 feet of free-board. (3) The pit shall be fenced or enclosed to prevent access by livestock, wildlife, and unauthorized personnel. If necessary, the pit shall be equipped to deter entry by birds. Fences shall not be constructed on the levees. Figure 1 in appendix A to this subpart shows an example of an acceptable fence design. (4) The pit levees are to be constructed so that the inside grade of the levee is no steeper than 1 (vertical):2 (horizonal), and the outside grade no steeper than 1:3. (5) The top of levees shall be level and at least 18 inches wide. (6) The pit location shall be reclaimed pursuant to the requirements and standards of the surface management agency. On a spilt estate (private surface, Federal mineral) a surface owner's release statement or form is acceptable. (b) Lined pits shall be designed to meet following requirement and minimum standards in addition to those specified in paragraph (a) of this section: (1) The material used in lining pits shall be impervious. It shall be resistant to weather, sunlight, hydrocarbons, aqueous acids, alkalies, salt, fungi, or other substances likely to be contained in the produced water. (2) If rigid materials are used, leak-proof expansion joints shall be provided, or the material shall be of sufficient thickness and length to withstand expansion without cracking, contraction, and settling movements in the underlying earth. Semi-rigid liners such as compacted bentonite or clay may also be used provided that, considering the thickness of the lining material chosen and its degree of permeability, the liner is impervious for the expected period of use. Figure 2 in appendix A to this subpart shows examples of acceptable standards for concrete, asphalt, and bentonite/clay liners. (3) If flexible membrane materials are used, they shall have adequate resistance to tears or punctures. Figure 3 in appendix A to this subpart gives an example of acceptable standards for installation of the flexible membrane. (4) Lined pits shall have an underlying gravel-filled sump and lateral system or other suitable devices for the detection of leaks. Examples of the acceptable design of the leak detection system are shown in Figures 4 and 5 of appendix A to this subpart. (c) Failure to design the pit to meet the requirements in paragraphs (a) and (b) of this section and minimum standards in this subpart will result in disapproval of the proposal or a requirement that it be modified unless a request for variance is approved by the authorized officer. § 3177.10 Construction and maintenance requirements for pits. Inspections will be conducted according to the following requirements and minimum standards during the construction and operation of the pit. Failure to meet the requirements and standards may result in issuance of an Incident of Noncompliance (INC) for the violation. The gravity of the violation, corrective actions, and the normal abatement period allowed are specified for each of the requirements/standards. (a) Any disposal method that has not been approved shall be considered an incident of noncompliance and may result in the issuance of a shut-in order, assessments, or penalties pursuant to 43 CFR part 3163 until an acceptable disposal method is provided and approved by the authorized officer. Table 1 to § 3177.10 (a) Violation Corrective action Normal abatement period Minor Major Minor Major Minor Major (b) The operator shall notify the authorized officer to inspect the leak detection system at least 2 business days prior to the installation of the pit liner. Table 2 to § 3177.10 (b) Violation Corrective action Normal abatement period Minor Require verification of its installation Prior to use of pit. (c) At least 2 business days prior to its use, the operator shall notify the authorized officer of completion of the pit construction, so that the authorized officer may verify that the pit has been constructed in accordance with the approved plan. Table 3 to § 3177.10 (c) Violation Corrective action Normal abatement period (For failure to notify) Minor N/A N/A. (For failure to construct in accordance with the approved plan) Minor, unless Major by definition The authorized officer may shut-in operations and require corrections to comply with the plan or require amendment of the plan 1 to 20 days depending on the severity of the violation and the degree of difficulty to correct, if the pit is in use. (d) Lined pit shall be maintained and operated to prevent unauthorized subsurface discharge of water. Table 4 to § 3177.10 (d) Violation Corrective action Normal abatement period Usually Minor, unless Major as result of discharge Repair/replace liner and possibly shut in operations 1 to 20 days depending on the onsite situation. (e) The pit shall be maintained as designed to prevent entrance of surface water by providing adequate surface drainage away from the pit. Table 5 to § 3177.10 (e) Violation Corrective action Normal abatement period Minor Provide surface drainage Within 20 days. (f) The pit shall be maintained and operated to prevent unauthorized surface discharge of water. Table 6 to § 3177.10 (f) Violation Corrective action Normal abatement period Usually Minor, unless discharge results in Major Clean up if spill occurs, and reduce the water level to maintain the 2 feet of free-board; shut-in operations, if required by authorized officer 1 to 20 days depending upon the onsite situation. (g) The outside walls of the pit levee shall be maintained as designed to minimize erosion. Table 7 to § 3177.10 (g) Violation Corrective action Normal abatement period Minor Necessary repair Within 20 days. (h) The pit shall be kept reasonably free from surface accumulation of liquid hydrocarbons that would retard evaporation. Table 8 to § 3177.10 (h) Violation Corrective action Normal abatement period Minor Clean-up, and may require skimmer pits, settling tanks, or other suitable equipment Within 20 days. (i) The operator shall inspect the leak detection system at least once a month or more often if required by the authorized officer in appropriate circumstances. The record of inspection shall describe the result of the inspection by date and shall be kept and made available to the authorized officer upon request. Table 9 to § 3177.10 (i) Violation Corrective action Normal abatement period Minor Commence the required routine inspection and recordkeeping Within 30 days. (j) Prior to pit abandonment and reclamation, the operator shall submit a Sundry Notice for approval by the authorized officer, if not previously approved. Table 10 to § 3177.10 (j) Violation Corrective action Normal abatement period Minor Cease operations and file an application Within 10 days. (k) When change in the quantity and/or quality of the water disposed into an unlined pit causes the pit no longer to meet the unlined pit criteria listed under § 3177.8(b)(1), the operator shall submit a Sundry Notice amending the pit design for approval by the authorized officer. Table 11 to § 3177.10 (k) Violation Corrective action Normal abatement period Minor unless the resulting damage is Major Submit the required amendment; shut-in operations if damage is determined by the authorized officer to be Major As specified by the authorized officer. § 3177.11 Other disposal methods. (a) The person applying to use the surface discharge disposal method under an NPDES permit shall furnish a copy of the NPDES permit issued by the EPA or the primacy State, a current water quality analysis, and a Sundry Notice, Form 3160-5, describing site facilities ( e.g., (b) Use of existing commercial pits designed for containment of produced water or tanks in lieu of pits. (c) New technology or any other proposal meeting the objective of this subpart that the authorized officer deems acceptable and that meets the requirements of State and Federal laws and regulations. § 3177.12 Reporting requirements for disposal facilities. All unauthorized discharge or spills from disposal facilities on Federal/Indian leases shall be reported to the authorized officer in accordance with the provisions of NTL-3A. Table 1 to § 3177.12 Violation Corrective action Normal abatement period Minor unless resulting damage is major Submit the required report As specified by the authorized officer. § 3177.13 Variances from requirements or minimum standards. An operator may request that the authorized officer approve a variance from any of the requirements or minimum standards prescribed in §§ 3177.5 through 3177.12. All such requests shall be submitted in writing to the appropriate authorized officer and provide information as to the circumstances that warrant approval of the variance(s) requested and the proposed alternative means by which the requirements or related minimum standard(s) will be satisfied. The authorized officer, after considering all relevant factors, will approve the requested variance(s) if it is determined that the proposed alterative(s) meet or exceed the objectives of the applicable minimum standard(s); or if the authorized officer determines that the exemption of the requirement is justified. Variances granted by BLM under this section shall be limited to proposals and requirements under BLM statutory and/or regulatory authority only, and shall not be construed as granting variances to regulations under EPA, State, or Tribal authority. Appendix A to Subpart 3177—Examples of Acceptable Designs and Construction Figure 1 to Appendix A to Subpart 3177—Construction of Fences and Corner Posts Figure 2 to Appendix A to Subpart 3177—Concrete, Asphalt, and Bentonite/Clay Liners Figure 3 to Appendix A to Subpart 3177—Flexible Liners Figure 4 to Appendix A to Subpart 3177—Leak Detection System for a Lined Pit Constructed in Relatively Impermeable Soils Figure 5 to Appendix A to Subpart 3177—Leak Detection System for a Lined Pit Constructed in Permeable Soils Subpart 3178—Royalty-Free Use of Lease Production Source: 81 FR 83078, Nov. 18, 2016, unless otherwise noted. § 3178.1 Purpose. The purpose of this subpart is to address the circumstances under which oil or gas produced from Federal and Indian leases may be used royalty-free in operations on the lease, unit, or communitized area. This subpart supersedes those portions of Notice to Lessees and Operators of Onshore Federal and Indian Oil and Gas Leases, Royalty or Compensation for Oil or Gas Lost (NTL-4A), pertaining to oil or gas used for beneficial purposes. § 3178.2 Scope. (a) This subpart applies to: (1) All onshore Federal and Indian (other than Osage Tribe) oil and gas leases, units, and communitized areas, except as otherwise provided in this subpart; (2) Indian Mineral Development Act (IMDA) oil and gas agreements, unless specifically excluded in the agreement or unless the relevant provisions of this subpart are inconsistent with the agreement; (3) Leases and other business agreements and contracts for the development of tribal energy resources under a Tribal Energy Resource Agreement entered into with the Secretary, unless specifically excluded in the lease, other business agreement, or Tribal Energy Resource Agreement; (4) Committed State or private tracts in a federally approved unit or communitization agreement defined by or established under 43 CFR subpart 3105 or 43 CFR part 3180; and (5) All onshore wells, and production equipment located on a Federal or Indian lease or a federally approved unit or communitized area, and compressors located on a Federal or Indian lease or a federally approved unit or communitized area and which compress production from the same Federal or Indian lease or federally approved unit or communitized area. (b) For purposes of this subpart, the term “lease” also includes IMDA agreements. § 3178.3 Production on which royalty is not due. (a) To the extent specified in §§ 3178.4 and 3178.5, royalty is not due on: (1) Oil or gas that is produced from a lease or communitized area and used for operations and production purposes (including placing oil or gas in marketable condition) on the same lease or communitized area without being removed from the lease or communitized area; or (2) Oil or gas that is produced from a unit PA and used for operations and production purposes (including placing oil or gas in marketable condition) on the unit, for the same unit PA, without being removed from the unit. (b) For the uses described in § 3178.5, the operator must obtain prior written BLM approval for the volumes used for operational and production purposes to be royalty free. § 3178.4 Uses of oil or gas on a lease, unit, or communitized area that do not require prior written BLM approval for royalty-free treatment of volumes used. (a) Oil or gas produced from a lease, unit, or communitized area may be used royalty-free for operations and production purposes on the lease, unit, or communitized area without prior written BLM approval in the following circumstances: (1) Use of fuel to generate power or operate combined heat and power; (2) Use of fuel to power equipment, including artificial lift equipment, equipment used for enhanced recovery, drilling rigs, and completion and workover equipment; (3) Use of gas to actuate pneumatic controllers or operate pneumatic pumps at production facilities; (4) Use of fuel to heat, separate, or dehydrate production; (5) Use of gas as a pilot fuel or as assist gas for a flare, combustor, thermal oxidizer, or other control device; (6) Use of fuel to compress or treat gas to place it in marketable condition; (7) Use of oil to clean the well and improve production, e.g., (8) Use of oil as a circulating medium in drilling operations, if the use is part of an approved Drilling Plan under Onshore Oil and Gas Order No. 1; (9) Injection of gas for the purpose of conserving gas or increasing the recovery of oil or gas, if the BLM has approved the injection under applicable regulations in parts 3100, 3160, or 3180 of this title; and (10) Injection of gas that is cycled in a contained gas-lift system. (b) The volume to be treated as royalty free must not exceed the amount of fuel reasonably necessary to perform the operational function, using equipment of appropriate capacity. § 3178.5 Uses of oil or gas on a lease, unit, or communitized area that require prior written BLM approval for royalty-free treatment of volumes used. (a) Oil or gas produced from a lease, unit, or communitized area may also be used royalty-free for the following operations and production purposes on the lease, unit, or communitized area, but prior written BLM approval is required to ensure that production accountability is maintained: (1) Use of oil or gas that the operator removes from the pipeline at a location downstream of the Facility Measurement Point (FMP); (2) Use of gas that has been removed from the lease, unit PA, or communitized area for treatment or processing because of particular physical characteristics of the gas that require the gas to be treated or processed prior to use, where the gas is returned to, and used on, the lease, unit PA, or communitized area from which it was produced; and (3) Any other types of use of produced oil or gas for operations and production purposes, which are not identified in § 3178.4. (b)(1) The operator must obtain BLM approval to conduct activities under paragraph (a) of this section by submitting a Form 3160-5, Sundry Notices and Reports on Wells (Sundry Notice) containing the information required under § 3178.9. If the BLM disapproves a request for royalty-free treatment for volumes used under this section, the operator must pay royalties on such volumes. If the BLM approves a request for royalty-free treatment for volumes used under this section, such approval will be deemed effective from the date the request was filed. (2) With respect to uses under paragraph (a)(1) of this section, the operator must measure the volume of oil or gas used in accordance with Onshore Oil and Gas Orders No. 4 (oil) and 5 (gas) as applicable, or other successor regulations. (3) With respect to removals under paragraph (a)(2) of this section, the operator must measure any gas returned to the lease, unit, or communitized area under such an approval in accordance with Onshore Oil and Gas Order No. 5 or other successor regulations. § 3178.6 Uses of oil or gas moved off the lease, unit, or communitized area that do not require prior written approval for royalty-free treatment of volumes used. Oil or gas used after being moved off the lease, unit, or communitized area may be treated as royalty free without prior written BLM approval only if the use meets the criteria under § 3178.4 and when: (a) The oil or gas is transported from one area of the lease, unit, or communitized area to another area of the same lease, unit, or communitized area where it is used, and no oil or gas is added to or removed from the pipeline while crossing lands that are not part of the lease, unit, or communitized area; or (b) A well is directionally drilled, the wellhead is not located on the producing lease, unit, or communitized area, and oil or gas is used on the same well pad for operations and production purposes for that well. § 3178.7 Uses of oil or gas moved off the lease, unit, or communitized area that require prior written approval for royalty-free treatment of volumes used. (a) Except as provided in § 3178.6(b) and paragraph (b) of this section, royalty is owed on all oil or gas used in operations conducted off the lease, unit, or communitized area. (b) The BLM may grant prior written approval to treat oil or gas used in operations conducted off the lease, unit, or communitized area as royalty free (referred to as off-lease royalty-free use) if the use is among those listed in § 3178.4(a) and § 3178.5(a) and if: (1) The equipment or facility in which the operation is conducted is located off the lease, unit, or communitized area for engineering, economic, resource protection, or physical accessibility reasons; and (2) The operations are conducted upstream of the FMP. (c) The operator must obtain BLM approval under paragraph (b) of this section by submitting a Sundry Notice containing the information required under § 3178.9. If the BLM disapproves a request for royalty-free treatment for volumes used under this section, the operator must pay royalties on such volumes. If the BLM approves a request for royalty-free treatment for volumes used under this section, such approval will be deemed effective from the date the request was filed. (d) Approval of measurement or commingling off the lease, unit, or communitized area under other regulations does not constitute approval of off-lease royalty-free use. The operator or lessee must expressly request, and submit its justification for, approval of off-lease royalty-free use. (e) If equipment or a facility located on a particular lease, unit, or communitized area treats oil or gas produced from properties that are not unitized or communitized with the property on which the equipment or facility is located, in addition to treating oil or gas produced from the lease, unit, or communitized area on which the equipment or facility is located, the operator may report as royalty free only that portion of the oil or gas used as fuel that is properly allocable to the share of production contributed by the lease, unit, or communitized area on which the equipment is located, unless otherwise authorized by the BLM under this section. § 3178.8 Measurement or estimation of volumes of oil or gas that are used royalty-free. (a) The operator must measure or estimate the volumes of royalty-free gas used in operations upstream of the FMP. (b) The operator must measure the volume of gas that is removed from the product stream downstream of the FMP and used royalty-free pursuant to sections 3178.4 through 3178.7. (c) The operator must measure the volume of oil that is used royalty-free pursuant to sections 3178.4 through 3178.7. The operator must also document removal of such oil from the tank or pipeline. (d) If the operator removes oil or gas downstream of the FMP and that oil or gas is used royalty-free pursuant to sections 3178.4 through 3178.7, the operator must apply for an FMP under section 3173.12 to measure the oil or gas that is removed for use. (e) When estimating gas volumes, the operator must use the best available information to make a reasonable estimate. (f) Each of the volumes required to be measured or estimated, as applicable, under this subpart, must be reported by the operator following applicable ONRR reporting requirements. § 3178.9 Requesting approval of royalty-free treatment when approval is required. To request written approval of royalty-free use when required under § 3178.5 or § 3178.7, the operator must submit a Sundry Notice that includes the following information: (a) A complete description of the operation to be conducted, including the location of all facilities and equipment involved in the operation and the location of the FMP; (b) The volume of oil or gas that the operator expects will be used in the operation, and the method of measuring or estimating that volume; (c) If the volume of gas expected to be used will be estimated, the basis for the estimate ( e.g., (d) The proposed disposition of the oil or gas used ( e.g., § 3178.10 Facility and equipment ownership. The operator is not required to own or lease the equipment or facility that uses oil or gas royalty free. The operator is responsible for obtaining all authorizations, measuring production, reporting production, and all other applicable requirements. Subpart 3179—Waste Prevention and Resource Conservation Source: 89 FR 25426, Apr. 10, 2024, unless otherwise noted. § 3179.1 Purpose. The purpose of this subpart is to implement and carry out the purposes of statutes relating to prevention of waste from Federal and Indian (other than The Osage Nation) oil and gas leases, protection of worker safety, conservation of surface resources, and management of the public lands for multiple use and sustained yield. This subpart supersedes those portions of Notice to Lessees and Operators of Onshore Federal and Indian Oil and Gas Leases, Royalty or Compensation for Oil and Gas Lost (NTL-4A) pertaining to, among other things, flaring and venting of produced gas, unavoidably and avoidably lost gas, and waste prevention. § 3179.2 Scope. (a) Except as provided in paragraph (b), this subpart applies to: (1) All onshore Federal and Indian (other than The Osage Nation) oil and gas leases, units, and communitized areas; (2) Indian Mineral Development Act (IMDA) agreements, unless specifically excluded in the agreement or unless the relevant provisions of this subpart are inconsistent with the agreement; (3) Leases and other business agreements and contracts for the development of Tribal energy resources under a Tribal Energy Resource Agreement (TERA) entered into with the Secretary, unless specifically excluded in the lease, other business agreement, or TERA; (4) Wells, equipment, and operations on State or private tracts that are committed to a federally approved unit or communitization agreement defined by or established under 43 CFR subpart 3105 or 43 CFR part 3180. (b) Sections 3179.50, 3179.90, and 3179.100 through 3179.102 apply only to operations and production equipment located on a Federal or Indian surface estate. They do not apply to operations and production equipment on State or private tracts, even where those tracts are committed to a federally approved unit or communitization agreement. (c) For purposes of this subpart, the term “lease” also includes IMDA agreements. [89 FR 25426, Apr. 10, 2024, as amended at 89 FR 92605, Nov. 22, 2024] § 3179.10 Definitions and acronyms. As used in this subpart, the term: Automatic ignition system Capture Compressor station Gas-to-oil ratio (GOR) Gas well High-pressure flare Leak (1) A hydrocarbon emission detected by use of an optical-gas-imaging instrument; (2) At least 500 ppm of hydrocarbon detected using a portable analyzer or other instrument that can measure the quantity of the release; or (3) A hydrocarbon emission detected via audio, visual, and olfactory means or visible bubbles detected using soap solution. Releases due to normal operation of equipment intended to vent as part of normal operations, such as gas-driven pneumatic controllers and safety-release devices, are not leaks unless the releases exceed the quantities and frequencies expected during normal operations. Releases due to operator errors or equipment malfunctions or from control equipment at levels that exceed applicable regulatory requirements, such as releases from an oil storage tank hatch left open, or an improperly sized combustor, are leaks. Liquids unloading Lost oil or lost gas Low-pressure flare Pneumatic controller § 3179.11 Severability. If a court holds any provisions of the regulations in this subpart or their applicability to any person or circumstances invalid, the remainder of this subpart and its applicability to other people or circumstances will not be affected. § 3179.30 Incorporation by Reference (IBR). Certain material is incorporated by reference into this subpart with the approval of the Director of the Federal Register under 5 U.S.C. 552(a) and 1 CFR part 51. To enforce any edition other than that specified in this section, the BLM must publish a rule in the Federal Register, [email protected]; https://www.blm.gov/programs/energy-and-minerals/oil-and-gas. www.archives.gov/federal-register/cfr/ibr-locations.html [email protected]. (a) American Petroleum Institute (API), 200 Massachusetts Ave. NW, Suite 1100, Washington, DC 20001; telephone 202-682-8000. API offers free, read-only access to some of the material at http://publications.api.org. (1) API Manual of Petroleum Measurement Standards Chapter 22.3, Testing Protocol for Flare Gas Metering; First Edition, August 2015 (“API 22.3”), IBR approved for § 3179.71(c). (2) [Reserved] (b) [Reserved] § 3179.40 Reasonable precautions to prevent waste. (a) Operators must use all reasonable precautions to prevent the waste of oil or gas developed from the lease. (b) The Authorized Officer may specify reasonable measures to prevent waste as conditions of approval of an Application for Permit to Drill (APD). (c) After an APD is approved, the Authorized Officer may order an operator to implement, within a reasonable time, additional reasonable measures to prevent waste at ongoing exploration and production operations. (d) Reasonable measures to prevent waste may reflect factors including, but not limited to, relevant advances in technology and changes in industry practice. § 3179.41 Determining when the loss of oil or gas is avoidable or unavoidable. For purposes of this subpart: (a) Lost oil is “unavoidably lost” if the operator has taken reasonable steps to avoid waste, and the operator has complied fully with applicable laws, lease terms, regulations, provisions of a previously approved operating plan, and other written orders of the BLM. (b) Lost gas is “unavoidably lost” if the operator has taken reasonable steps to avoid waste, the operator has complied fully with applicable laws, lease terms, regulations, provisions of a previously approved operating plan, and other written orders of the BLM; and the gas is lost from the following operations or sources: (1) Well drilling, subject to the limitations in § 3179.80; (2) Well completion and recompletion flaring allowances in § 3179.81; (3) Subsequent well tests, subject to the limitations in § 3179.82; (4) Exploratory coalbed methane well dewatering; (5) Emergency situations, subject to the limitations in § 3179.83; (6) Normal operating losses from a natural-gas-activated pneumatic controller or pump; (7) Normal operating losses from an oil storage tank or other low-pressure production vessel that is in compliance with §§ 3179.90 and 3174.5(b); (8) Well venting in the course of downhole well maintenance and/or liquids unloading performed in compliance with § 3179.91; (9) Leaks, when the operator has complied with the LDAR requirements in §§ 3179.100 and 3179.101; (10) Facility and pipeline maintenance, such as when an operator must blow-down and depressurize equipment to perform maintenance or repairs; (11) Pipeline capacity constraints, midstream processing failures, or other similar events that prevent oil-well gas from being transported through the connected pipeline, subject to the limitations in the WMP or self-certification for Applications for Permit to Drill approved after June 10, 2024 or § 3179.70, as applicable; (12) Flaring of gas from which at least 50 percent of natural gas liquids have been removed on-lease and captured for market, if the operator has notified the BLM through a Sundry Notices and Report on Wells, Form 3160-5 (Sundry Notice) that the operator is conducting such capture and the inlet of the equipment used to remove the natural gas liquids will be a Facility Measurement Point (FMP); or (13) Flaring of gas from a well that is not connected to a gas pipeline, to the extent that such flaring was authorized by the BLM in the approval of the APD. (c) Lost oil or gas that is not “unavoidably lost” as defined in paragraphs (a) and (b) of this section is “avoidably lost.” § 3179.42 When lost production is subject to royalty. (a) Royalty is due on all avoidably lost oil or gas. (b) Royalty is not due on any unavoidably lost oil or gas. § 3179.43 Data submission and notification requirements. (a) Table 1 is a summary of the Sundry Notice requirements in this subpart. Table 1 to Paragraph (a) Sundry notice requirements Reference Flaring of gas following removal of ≥50 percent of the natural gas liquids from the gas stream on-lease § 3179.41(b)(12). Other gas sample location for flare approved by the AO § 3179.71(d)(3) and (e)(2). Unavoidable/avoidable determination of loss of oil and/or gas while drilling for loss of well control event § 3179.80. Extension of time limit or volumetric limit for well completion or recompletion flaring, or exploratory coalbed methane dewatering flaring § 3179.81(e). Extension of time limit for well testing subsequent to initial completion § 3179.82. Within 45 days of start of an emergency, estimate the volume flared or vented beyond the first 48 hours of the emergency § 3179.83(c). Delay of leak repair beyond 30 calendar days with good cause § 3179.101(b). (b) Table 2 summarizes the locations in this subpart that require an operator to provide information to the authorized officer upon request. Table 2 to Paragraph (b) Information required at the request of the AO Reference Ultrasonic meter flare gas testing report § 3179.71(c)(2)(i). Ultrasonic meter manufacturer's specifications including installation and operation specifications § 3179.71(c)(2)(ii). Recordkeeping for vented or flared gas events § 3179.72(c). Recordkeeping for leak detection and repair § 3179.102(a). (c) Table 3 summarizes the initial LDAR program submission and subsequent annual reporting. Table 3 to Paragraph ( c Information required to be sent to the BLM State Office Reference First submission of a leak detection and repair program to the BLM for review § 3179.100(b) and (d). Annual review and update of the leak detection and repair program to the BLM § 3179.100(e). § 3179.50 Safety. (a) The operator must flare, rather than vent, any gas that is not captured, except when: (1) Flaring the gas is technically infeasible, such as when volumes are too small to flare; (2) Under emergency conditions, the loss of gas is uncontrollable, or venting is necessary for safety; (3) The gas is vented through normal operation of a natural-gas-activated pneumatic controller or pump; (4) The gas is vented from an oil storage tank; (5) The gas is vented during downhole well maintenance or liquids unloading activities performed in compliance with § 3179.91; (6) The gas is vented through a leak; (7) Venting is necessary to allow non-routine facility and pipeline maintenance, such as when an operator must, upon occasion, blow-down and depressurize equipment to perform maintenance or repairs; or (8) A release of gas is necessary and flaring is prohibited by Federal, State, local, or Tribal law or regulation, or enforceable permit term. (b) All flares or combustion devices must be equipped with an automatic ignition system or an on-demand ignition system. Upon discovery of a flare that is venting instead of combusting gas, the BLM may subject the operator to an immediate assessment of $1,000 per violation. (c) The flare must be placed a sufficient distance from the tanks' containment area and any other significant structures or objects so that the flare does not create a safety hazard. The prevailing wind direction must be taken into consideration when locating the flare. § 3179.60 Gas-well gas. Gas-well gas may not be flared or vented, except where it is unavoidably lost pursuant to § 3179.41(b). § 3179.70 Oil-well gas. (a) Where oil-well gas must be flared due to pipeline capacity constraints, midstream processing failures, or other similar events that prevent produced gas from being transported through the connected pipeline, the oil-well gas is “unavoidably lost” for the purposes of 43 CFR 3162.3-1(j), 43 CFR 3179.41(b)(11), and 3179.42, subject to the following limits: (1) Flaring of 0.08 Mcf per barrel of oil produced per month between July 1, 2024 and July 1, 2025. (2) The flaring limit of 0.07 Mcf per barrel of oil produced per month will begin on July 1, 2025. (3) The flaring limit of 0.06 Mcf per barrel of oil produced per month will begin on July 1, 2026. (4) The flaring limit of 0.05 Mcf per barrel of oil produced per month will begin on July 1, 2027, and remain at this level. (b) Where substantial volumes of oil-well gas are flared the BLM may order the operator to curtail or shut-in production as necessary to avoid the undue waste of Federal or Indian gas. The BLM will not issue a shut-in or curtailment order under this paragraph unless the operator has reported flaring in excess of 1 Mcf per barrel of oil produced per month for 3 consecutive months and the BLM confirms that flaring is ongoing. (c) If a BLM order under paragraph (b) of this section would adversely affect production of oil or gas from non-Federal and non-Indian mineral interests ( e.g., § 3179.71 Measurement of flared oil-well gas volume. (a) The operator may commingle flared gas from more than one lease, unit PA, or CA to a common high-pressure flare without BLM approval, subject to the allocation requirement in paragraph (h). The site facility diagram required under § 3173.11 must indicate that the high-pressure flare is a common, commingled flare and list the leases, unit PAs, or CAs contributing gas to the common flare. (b) The operator must measure flared gas for high-pressure flares for volumes greater than or equal to 1,050 Mcf per month over the averaging period. For high-pressure flares measuring less than 1,050 Mcf per month over the averaging period, operators may estimate the volume flared, as described in paragraph (g) of this section. (c) High-pressure flares requiring measurement must use either orifice plates and orifice meter tubes, or ultrasonic meters. High-pressure flare measurement systems must meet the following requirements: (1) Orifice metering systems must comply with the low-volume measurement requirements in § 3175.80, low-volume electronic gas measurement requirements in § 3175.100, and the low-volume gas sampling and analysis requirements in § 3175.110 with the gas sampling location requirements provided in paragraph (d) or (e) of this section. (2) Ultrasonic metering systems must comply with the following requirements: (i) Each ultrasonic meter make and model must be tested for flare use. Flare gas meter testing must be conducted and reported pursuant to API 22.3 (incorporated by reference, see § 3179.30) and results must be made available to the AO upon request. (ii) Ultrasonic meters must be installed and operated for flare use according to the manufacturer's specifications and those specifications must be provided to the AO upon request. (iii) Ultrasonic metering systems must comply with the low-volume electronic gas measurement requirements in § 3175.100, and the low-volume gas sampling analysis requirements in § 3175.110, except for the gas sampling requirements in paragraph (d) or (e) of this section. (3) Operators must evaluate the production facility to determine which type of flare measurement is safe for the facility. (d) The gas sample must be taken from one of the following locations when the high-pressure flare is measuring a single lease, unit PA, or CA: (1) At the flare meter; (2) At the gas FMP, if there is a gas FMP at the well site and the gas composition is the same as that of the flare-meter gas; or (3) At another location approved by the AO with a Sundry Notice submission. (e) The gas sample must be taken from one of the following locations for a common high-pressure flare that measures more than one lease, unit PA, or CA; (1) At the flare meter; or (2) At another location approved by the AO with a Sundry Notice submission. (f) Appropriate meters must be installed at all high-pressure flares pursuant to paragraph (c) of this section, and gas sampling must be taken from the appropriate location pursuant to paragraphs (d) or (e) of this section according to the following phase-in timeline: Table 1 to Paragraph (f) Flare flow category Deadline for measurement compliance for high-pressure flares and gas sampling location ≥30,000 Mcf per month December 10, 2024. <30,000 Mcf per month and ≥6,000 Mcf per month June 10, 2025. <6,000 Mcf per month and ≥1,050 Mcf per month December 10, 2026. <1,050 Mcf per month Not applicable. (g) For high-pressure flares with volumes less than 1,050 Mcf per month, the flared volume may be estimated, or measured. Estimated flared gas volumes must be based on production reported on the ONRR OGORs over the previous 6 months and calculated as follows: Equation 1 to Paragraph ( g Where: GOR r m = The previous 6 months of flaring V g V o Equation 2 to Paragraph ( g V f V op GOR r V LU V s Where: V f V op GOR r V LU V s (h) If a flare is combusting gas that is combined across multiple leases, unit PAs, or CAs, the operator may measure the gas at a single point at the flare and allocate flared volumes based on the oil production while flaring from each lease, unit PA, or CA as follows: Equation 3 to Paragraph ( h Where: n = The total number of leases, unit PAs, or CAs sending gas to a common flare VF i VF t V opi (i) Measurement points for flared volumes are not FMPs for the purposes of subpart 3175. [89 FR 92605, Nov. 22, 2024, as amended at 90 FR 57923, Dec. 15, 2025] § 3179.72 Required reporting and recordkeeping of vented and flared gas volumes. (a) The operator must report all flared volumes, both avoidable and unavoidable losses, using all applicable ONRR reporting requirements. (b) The operator must report the flared gas quality in Btu on the OGOR based on the gas analysis required in § 3179.71(d) or (e). The operator must report the same Btu content from a common flare on the OGOR for all the leases, unit PAs, or CAs contributing gas to the flare based on the gas sample analysis. (c) Starting on September 10, 2024,operators must maintain the following records and make them available to the AO upon request: (1) Date and time when oil or gas-well flaring begins and ends, the reason for flaring and whether the well, lease, unit PA, or CA was shut-in or returned to sales when the flaring stopped; (2) Date and time when an emergency begins and ends, the reason for the emergency, whether the gas was vented or flared, and whether the well, lease, unit PA, or CA was shut-in or returned to sales when the emergency ended; (3) Date and time when manual downhole liquids unloading operation or well purging begins and ends, and whether the well was shut-in or returned to sales at the end of the well maintenance. § 3179.73 Prior determinations regarding royalty-free flaring. (a) Approvals to flare royalty free, which are in effect as of the effective date of this rule, will continue in effect until November 1, 2024. After that date, the royalty-bearing status of all flaring will be determined according to the provisions of this subpart. (b) The provisions of this subpart do not affect any determination made by the BLM before or after June 10, 2024, with respect to the royalty-bearing status of flaring that occurred prior to June 10, 2024. Flaring and Venting Gas During Drilling and Production Operations § 3179.80 Loss of well control while drilling. If, during drilling, gas is lost as a result of loss of well control, the operator must notify the BLM within 24 hours of the start of the loss of the well control event and submit to the BLM a Sundry Notice within 15 days following the conclusion of the event describing the loss of well control. The BLM will determine whether the loss of well control was due to operator negligence. Oil or gas lost as a result of loss of well control is avoidably lost if the BLM determines that the loss of well control was due to operator negligence. The BLM will notify the operator in writing when it determines whether oil or gas was lost due to operator negligence, and whether such loss will qualify as an avoidable loss. § 3179.81 Well completion or recompletion flaring allowance. (a) Gas flared following well completion or recompletion is royalty-free under §§ 3179.41(b)(2) and 3179.42(b) until one of the following occurs: (1) Thirty days have passed since the beginning of the flowback following completion or recompletion, except as provided in paragraphs (b) and (d) of this section; (2) The operator has flared 20,000 Mcf of gas; or (3) Flowback has been routed to the production separator. (b) The BLM may extend the period specified in paragraph (a)(1) of this section, not to exceed an additional 60 days, based on flowback delays caused by well or equipment problems. (c) The BLM may increase the limit specified in paragraph (a)(2) of this section by up to an additional 30,000 Mcf of gas for exploratory oil wells in remote locations where additional flaring may be needed in advance of construction of pipeline infrastructure. (d) During the dewatering and initial evaluation of an exploratory coalbed methane well, the 30-day period specified in paragraph (a)(1) of this section is extended to 90 days. The BLM may approve up to two extensions of this evaluation period, not to exceed 90 days per each approval. (e) The operator must submit its request for an extension under paragraphs (b), (c), or (d) of this section using a Sundry Notice. § 3179.82 Subsequent well tests for an existing completion. During well tests subsequent to the initial completion or recompletion, the operator may flare gas royalty free under § 3179.41(b)(3) for no more than 24 hours, unless the BLM approves or requires a longer period. The operator must submit any such request using a Sundry Notice. § 3179.83 Emergencies. (a) An operator may flare or, if flaring is not feasible due to the emergency situation, vent gas royalty-free under § 3179.41(b)(5) for no longer than 48 hours during an emergency situation. For purposes of this subpart, an “emergency situation” is a temporary, infrequent, and unavoidable situation in which the loss of gas is necessary to avoid a danger to human health, safety, or the environment. (b) The following examples do not constitute emergency situations for the purposes of royalty assessment: (1) Recurring failures of a single piece of equipment; (2) The operator's failure to install appropriate equipment of a sufficient capacity to accommodate the production conditions; (3) Failure to limit production when the production rate exceeds the capacity of the related equipment, pipeline, or gas plant, or exceeds sales contract volumes of oil or gas; (4) Scheduled maintenance; or (5) A situation caused by operator negligence. (c) Within 45 days of the start of the emergency, the operator must estimate and report to the AO by a Sundry Notice the volumes flared or vented beyond the timeframe specified in paragraph (a) of this section, and details describing the emergency event, measures taken to prevent the emergency event, and actions taken to control the emergency event so that the BLM is able to determine if the loss of oil or gas is an unavoidable loss pursuant to § 3179.41. Gas Flared or Vented From Equipment and During Well Maintenance Operations § 3179.90 Oil storage tank vapors. (a) The hatch on an oil storage tank may be open only to the extent necessary to conduct production and measurement operations. All oil storage tanks, hatches, connections, and other access points must be vapor tight ( i.e. (b) Where practical and safe, gas released from an oil storage tank must be flared rather than vented. An operator may commingle vapors from multiple storage tanks to a single flare without prior approval from the BLM. § 3179.91 Downhole well maintenance and liquids unloading. (a) Gas vented or flared during downhole well maintenance and well purging is royalty free for a period not to exceed 24 hours per event, provided that the requirements of paragraphs (b) through (d) of this section are met. Gas vented or flared from a plunger lift system and/or an automated well control system is royalty free, provided the requirements of paragraphs (b) and (c) of this section are met. (b) The operator must minimize the loss of gas associated with downhole well maintenance and liquids unloading, consistent with safe operations. (c) For wells equipped with a plunger lift system and/or an automated well control system, minimizing gas loss under paragraph (b) of this section includes optimizing the operation of the system to minimize gas losses to the extent possible, consistent with removing liquids that would inhibit proper function of the well. (d) For any liquids unloading by manual well purging, the operator must ensure that the person conducting the well purging remains present on-site throughout the unloading to end it as soon as practical, thereby minimizing any venting to the atmosphere. (e) For purposes of this section, “well purging” means blowing accumulated liquids out of a wellbore by reservoir pressure, whether manually or by an automatic control system that relies on real-time pressure or flow, timers, or other well data, where the gas is vented to the atmosphere. Well purging does not apply to wells equipped with a plunger lift system. § 3179.92 Size of production equipment. Production and processing equipment must be of sufficient size to accommodate the volumes of production expected to occur at the lease site. Leak Detection and Repair (LDAR) § 3179.100 Leak detection and repair program. (a) Pursuant to paragraph (b) of this section, the operator must maintain a BLM administrative statewide LDAR program designed to prevent the waste of Federal or Indian gas. (b) Operators must submit a statewide LDAR program to the BLM state office with jurisdiction over the production for review. The LDAR program must cover operations and production equipment located on a Federal or Indian oil and gas lease and not operations and production equipment located on State or private tracts, even though those tracts are committed to a federally approved unit PA or CA. When there is a change of operator, the new operator must update the LDAR program on the annual update and revision timeline. Operators must submit the LDAR program in writing for review until such time as the BLM's electronic filing system is capable of receiving LDAR program submissions. At minimum, the LDAR program must contain the following information, as applicable: (1) Identification of the leases, unit PAs, CAs by geographic State for all States within BLM's administrative State boundaries to which the LDAR program applies; and (2) Identification of the method and frequency of leak detection inspection used at the lease, unit PA, or CA. Acceptable methods, as well as other methods approved by the BLM, and frequency include the following: (i) Well pads with only wellheads and no production equipment or storage must include quarterly Audio-Visual-Olfactory (AVO) inspections for leak detection; (ii) Well pads with any production and processing equipment and oil storage must include AVO inspections every other month and quarterly optical gas imaging for leak detection; and (iii) Other leak detection inspection methods and frequency acceptable to the BLM ( e.g., (3) Identification of the operator's recordkeeping process for leak detection and repair pursuant to § 3179.102. (c) The BLM will review the operator's LDAR program and notify the operator if the BLM deems the program to be inadequate. The notification will explain the basis for the BLM's determination, identify the plan's inadequacies, describe any additional measures that could address the inadequacies, and provide a reasonable time frame in which the operator must submit a revised LDAR program to the BLM for review. (d) For leases in effect on June 10, 2024, the operator must submit a statewide LDAR program to the state office no later than December 10, 2026. (e) Operators must review and update submitted LDAR programs on an annual basis in the month in which the operator submitted the first LDAR program to ensure the identified leases, unit PAs, and CAs, leak detection methods, and frequency of inspections are current. If the operator's LDAR program requires no changes, then the operator must notify the BLM state office that the LDAR program submitted and reviewed by the BLM remains in effect. Any updates to the LDAR program must be submitted in writing to the BLM state office for review until such time as the BLM's electronic system is capable of receiving the annual LDAR updates. [89 FR 92606, Nov. 22, 2024, as amended at 90 FR 57923, Dec. 15, 2025] § 3179.101 Repairing leaks. (a) The operator must repair any leak as soon as practicable, and in no event later than 30 calendar days after discovery, unless good cause exists to delay the repair for a longer period. Good cause for delay of repair exists if the repair (including replacement) is technically infeasible (including unavailability of parts that have been ordered), would require a pipeline blowdown, a compressor station shutdown, or a well shut-in, or would be unsafe to conduct during operation of the unit. (b) If there is good cause for delaying the repair beyond 30 calendar days, the operator must notify the BLM of the cause by Sundry Notice and must complete the repair at the earliest opportunity, such as during the next compressor station shutdown, well shut-in, or pipeline blowdown. In no case will the BLM approve a delay of more than 2 years. (c) Not later than 30 calendar days after completion of a repair, the operator must verify the effectiveness of the repair by conducting a follow-up inspection using an appropriate instrument or a soap bubble test under Section 8.3.3 of EPA Method 21—Determination of Volatile Organic Compound Leaks (40 CFR Appendix A-7 to part 60). (d) If the repair is not effective, the operator must complete additional repairs within 15 calendar days and conduct follow-up inspections and repairs until the leak is repaired. § 3179.102 Required recordkeeping for leak detection and repair. (a) The operator must maintain the following records for the period required under 43 CFR 3162.4-1(d) and make them available to the AO upon request: (1) For each inspection required under § 3179.100 of this subpart, documentation of: (i) The date of the inspection; and (ii) The site where the inspection was conducted; (2) The monitoring method(s) used to determine the presence of leaks; (3) A list of leak components on which leaks were found; (4) The date each leak was repaired; and (5) The date and result of the follow-up inspection(s) required under § 3179.101(c). (b) With the annual review and update of the LDAR program under § 3179.100(e) the operator must provide to the BLM state office an annual summary report on the previous year's inspection activities that includes: (1) The number of sites inspected; (2) The total number of leaks identified, categorized by the type of component; (3) The total number of leaks that were not repaired from the previous LDAR program year due to good cause and an estimated date of repair for each leak. (c) AVO checks are not required to be documented unless they find a leak requiring repair. Immediate Assessments § 3179.200 Immediate assessments Certain instances of noncompliance warrant the imposition of immediate assessments upon the violation, as prescribed in the following table. Imposition of any of these assessments does not preclude other appropriate enforcement actions under other applicable regulations. Table 1 to § 3179.200—Violations Subject to Immediate Assessment Violation: Assessment amount per violation: 1. Flare is not combusting gas sent to flare. As required in § 3179.50(b) $1,000 2. Storage tank hatch is open or unlatched, and unattended in violation of § 3179.90 1,000 This action by the Principal Deputy Assistant Secretary is taken pursuant to an existing delegation of authority.

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