PART 449—AIRPORT DEICING POINT SOURCE CATEGORY Authority: 33 U.S.C. 1311, 1314, 1316, 1318, 1342, 1361 and 1370. Source: 77 FR 29203, May 16, 2012, unless otherwise noted. Subpart A—Airport Deicing Category § 449.1 Applicability. This part applies to discharges of pollutants from deicing operations at Primary Airports. § 449.2 General definitions. The following definitions apply to this part: Aircraft deicing fluid (ADF) Airfield pavement Airside Annual non-propeller aircraft departures i.e., Available ADF Centralized deicing pad COD Collection requirement Defrosting Deicing (1) An aircraft; or (2) Airfield pavement. Deicing for safe taxiing FAA Advisory Circular Heating degree day Normalized Type I or Type IV aircraft deicing fluid Primary Airport § 449.10 Effluent limitations representing the best available technology economically achievable (BAT). Except as provided in 40 CFR 125.30 through 125.32, any existing point source with at least 1,000 annual non-propeller aircraft departures must comply with the following requirements representing the degree of effluent reduction attainable by the application of BAT. The BAT requirements for point sources with less than 1,000 annual non-propeller aircraft departures are beyond the scope of this regulation and shall be determined by the permit authority on a site-specific basis. (a) Airfield pavement deicing. Table I—BAT Limitations Wastestream Pollutant Daily maximum Airfield Pavement Deicing Ammonia as Nitrogen 14.7 mg/L. (b) [Reserved] § 449.11 New source performance standards (NSPS). New sources with at least 1,000 annual non-propeller aircraft departures must achieve the following new source performance standards. The new source performance standards for point sources with less than 1,000 annual non-propeller aircraft departures are beyond the scope of this part and shall be determined by the permit authority on a site-specific basis. (a) Aircraft deicing. (1) Collection requirement. (2) Numerical effluent limitation. Table II—NSPS Wastestream Pollutant Daily maximum Weekly average Aircraft Deicing COD 271 mg/L 154 mg/L. (b) Airfield pavement deicing. Table III—NSPS Wastestream Pollutant Daily maximum Airfield Pavement Deicing Ammonia as Nitrogen 14.7 mg/L. § 449.20 Monitoring, reporting and recordkeeping requirements. (a) Demonstrating compliance with the ADF collection requirement for dischargers subject to NSPS collection requirements in § 449.11. (1) The permittee shall maintain records to demonstrate, and certify annually, that it is operating and maintaining one or more centralized deicing pads. This technology shall be operated and maintained according to the technical specifications set forth in paragraphs (a)(1)(i) through (iv) of this section. For both individual and general permits, these technical specifications shall be expressly set forth as requirements in the permit. The permittee's demonstration and valid certification are sufficient to meet the applicable NSPS collection requirement without the permittee having to determine the numeric percentage of available ADF collected. (i) Each centralized deicing pad shall be sized and sited in accordance with all applicable FAA advisory circulars. (ii) Drainage valves associated with the centralized deicing pad shall be activated before deicing activities commence, to collect available ADF. (iii) The centralized deicing pad and associated collection equipment shall be installed and maintained per any applicable manufacturers' instructions, and shall be inspected, at a minimum, at the beginning of each deicing season to ensure that the pad and associated equipment are in working condition. (iv) All aircraft deicing shall take place on a centralized deicing pad, with the exception of defrosting and deicing for safe taxiing. (2) Alternative technology or specifications. (A) The use of a different ADF collection technology from the centralized deicing pad technology specified in paragraph (a)(1) of this section; or (B) The use of the same ADF collection technology, but with different specifications for operation and/or maintenance. (ii) Pollution prevention credit. (iii) The Director shall set forth technical specifications for proper operation and maintenance of the chosen collection technology, as appropriate, and compliance with these technical specifications must be required by the permit. The permit shall also require the permittee to maintain records sufficient to demonstrate compliance with these requirements. This demonstration constitutes compliance by the permittee with the percent capture requirement without the permittee having to determine the numeric percentage of ADF that it has collected. Before the Director may approve an alternate technology under this subsection, the permittee must demonstrate to the Director's satisfaction that the alternate technology will achieve the applicable percent capture requirement. (3) The permittee shall maintain records, by means deemed acceptable by the Director, and report at a frequency determined by the Director, on the volume of ADF sprayed and the amount of available ADF collected in order to determine the compliance with the collection requirement. (b) Monitoring requirements COD limitation. (2) Ammonia limitation. (c) Recordkeeping. (2) At the Director's discretion, a requirement may be included in the permit for the permittee to collect, and maintain on site during the term of the permit, up to five (5) years of data on the annual volume of ADF used. Subpart B [Reserved] Appendix A to Part 449—Sampling Protocol for Soluble COD This sampling protocol applies only to samples collected for use in measurement of COD when demonstrating compliance with the regulations set forth in this part. Collect a representative sample of the effluent from the airport deicing treatment system, based on the discharge permit requirements (e.g., a grab sample or a composite sample). Because only the COD sample is filtered, do not use in-line filters if collecting a sample with a compositing device. A. Grab Samples 1. Cap the container and shake the grab sample vigorously to mix it. Remove the plunger from a 10-milliliter (mL) or larger Luer-lock plastic syringe equipped with an Acrodisc Luer-lock filter containing a 1.5-μm glass fiber filter (Whatman 934-AH, or equivalent), and fill the syringe body with sample. 2. Replace the plunger and filter the sample into a clean 50-mL screw-cap glass, plastic, or fluoropolymer bottle. Note: If testing is being done in the field, or with a test kit product (e.g., Hach Method 8000), the filtrate may be collected in the test kit vial or container. 3. Additional 10-mL volumes of sample may be filtered and the filtrate added to the same sample bottle. This additional volume may be used to repeat sample analyses or to prepare Quality Control (QC) samples, as needed. 4. Unless the filtered sample will be analyzed within 15 minutes, preserve the filtered sample with H 2 4 5. Once at the analytical laboratory, the sample must be stored at ≤6 degrees Celsius and analyzed within 28 days of collection (see the requirements for COD in Table II at 40 CFR part 136). 6. Analyze the sample using a method approved for COD in Table IB at 40 CFR part 136. Note: Because this procedure is specific to this point source category, it does not appear by name in 40 CFR part 136. 7. Report the sample results as Soluble COD in units of milligrams per liter (mg/L). There is no Chemical Abstracts Service (CAS) Registry Number for soluble COD. B. Composite Samples 1. If the sample will be analyzed in a fixed laboratory (as opposed to field testing), transfer at least 50 mL of well-mixed sample from the compositing device into a clean 50-mL screw-cap glass, plastic, or fluoropolymer bottle. Preserve the sample with H 2 4 2. Once at the analytical laboratory, the sample must be stored at ≤6 degrees Celsius and analyzed within 28 days of collection (see the requirements for COD in Table II at 40 CFR part 136). 3. Prior to analysis, remove the sample from cold storage and allow it to warm to room temperature. Shake the sample vigorously to mix it. 4. Remove the plunger from a 10-mL or larger Luer-lock plastic syringe equipped with an Acrodisc Luer-lock filter containing a 1.5-μm glass fiber filter (Whatman 934-AH, or equivalent), and fill the syringe body with sample. 5. Replace the plunger and filter the sample into a clean COD vial or other suitable container. 6. Additional 10-mL volumes of sample may be filtered and the filtrate added to separate containers, as needed, to provide samples for repeat analyses or to prepare QC samples. 7. Analyze the sample using a method approved for COD in Table 1B at 40 CFR part 136. Note: Because this procedure is specific to this point source category, it does not appear by name in 40 CFR part 136. 8. Report the sample results as Soluble COD in units of mg/L. There is no CAS Registry Number for soluble COD.