For purposes of taking action under section 9604 or 9606 of this title and listing facilities on the National Priorities List, the President shall give a high priority to facilities where the release of hazardous substances or pollutants or contaminants has resulted in the closing of drinking water wells or has contaminated a principal drinking water supply. ( Pub. L. 96–510, title I, § 118 , as added Pub. L. 99–499, title I, § 118(a) , Oct. 17, 1986 , 100 Stat. 1655 .) CFR Title Parts 2 1500 40 3 , 9 , 34 , 35 , 300 , 302 , 305 , 307 , 451