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TAPE 4 s Analytical Results of Ground Water Samples - 25 February 2003 PACIFIC CAR WASH 4405 Pacific Avenue, Stockton, California MW-1 MW-2 MW-3 MW-4 MW-5 MW-6 MW-7 MW-8 MW-9 MW-]OA MW-10B MW-ll MW-12 48 to )3 25 to 45 29%:to 49'/� 30 to 50 25 to 45 25045 20 to 40 20 to 40 20 to 40 23 to 43 50 to 55 25 to 45 25 to 45 TPH-g 21,000' 76,000' 23,000' ND<50 ND<50 71,000' ND<50 ND<50 2,800' ND<50 ND<50 ND<50 ND<50 Benzene EPA 4,401) 1,300 270 ND<0 5 ND<0 5 270 ND<0 5 ND<0 5 270 ND<2 5 ND<2 5 ND<0 5 ND<0 5 Toluene 8015M/ 380 3,600 100 ND<0 5 ND<0 5 2,800 ND<0 5 ND<0 5 ND<5 ND<2 5 ND<2 5 ND<0 5 ND<0 5 thylbenzene 8020 420 3,100 1 1,400 ND<0 5 ND<0 5 2,800 ND<0 5 ND<0 5 170 ND<2 5 ND<2 5 ND<0 5 ND<0 5 Xylene 1,500 15,000 2,500 ND<0 5 ND<0 5 16,000 ND<0 5 ND<0 5 35 ND<2 5 ND<2 5 ND<0 5 ND<0 5 MTBE 170 ND<50 ND<50 ND<0 5 ND<0 5 660 3 6 ND<0 5 61 180 130 82 ND<0 5 DIPE ND<100 ND<50 ND<50 ND<0 5 ND<0 5 ND<100 ND<0 5 ND<0 5 ND<5 0 ND<2 5 ND<2 5 ND<0 5 ND<0 5 TAME ND<100 ND<50 ND<50 ND<0 5 ND<0 5 ND<100 ND<0 5 ND<0 5 ND<5 0 ND<2 5 ND<2 S ND<0 5 ND<0 5 ETRE 8EPA ND<100 ND<50 ND<50 ND<0 5 ND<0 5 ND<100 ND<0 5 ND<0 5 ND<5 0 ND<2 5 ND<2 5 ND<0 5 ND<0 5 TBA ND<1000 ND<500 ND<500 ND<5 0 ND<5 0 ND<1000 ND<5 0 ND<50 ND<5 0 ND<25 ND<25 ND<50 ND<5 0 EDB ND<100 ND<50 ND<50 ND<0 5 ND<0 5 ND<100 ND<0 5 ND<0 5 ND<5 0 ND<2 5 ND<2 5 ND<0 5 ND<0 5 1,2-DCA 110 ND<50 ND<50 ND<0 5 ND<0 5 ND<100 ND<0 5 ND<0 5 ND<5 0 ND<2 5 ND<2 5 0 71 ND<0 5 Notes All samples reported in micrograms per liter(µg11),TPH-g total petroleum hydrocarbons quantified as gasoline MTBE methyl tertiary butyl ether,DIPE dr-isopropyl ether,TAME tert-amyl methyl ether,ETRE ethyl tert-bury]ether,TBA tert-butanol,1,2-DCA 1,2-dichloroethane,EDB ethylene dtbromidf. ND not detected,NA not analyzed < indicates constituents were not detected at concentration greater than the reporting limit shown ' unmodified or weakly modified gasoline is significant I i