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• • TABLE 4-CONTINUED Analytical Results of Ground Water Samples by EPA Method 8260 Modified PACIFIC PRIDE - SOUTH EL DORADO STREET, 3147 South El Dorado Street, Stockton, California Sample MTBE DIPS ETBE TAME TBA 1,2-DCA EDB Methanol Ethanol Location Sample Date EPA Method 8260/8020 MW-5/ 12-28-00 ND<l ND<1 ND<1 ND<1 ND<5 15 ND<1 ND<200 ND<50 80 to 90 ft 03-30-01 ND<l ND<1 ND<1 ND<1 ND<5 ND<1 ND<1 ND<200 ND<50 06-27-01 ND<1 ND<1 ND<1 ND<1 ND<5 ND<1 ND<1 ND<500 ND<50 09-26-01 ND<1 ND<1 ND<1 ND<1 ND<5 ND<1 ND<1 ND<500 ND<50 12-20-01 ND<1 ND<1 ND<1 ND<1 ND<5 ND<l ND<1 ND<500 ND<50 03-01-02 ND<1 ND<1 ND<1 ND<1 ND<5 ND<50 ND<50 ND<500 ND<50 06-03-02 ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 ND<0 5 ND<0 5 ND<500 ND<50 12-02-02 ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 ND<0 5 ND<0 5 - - 03-20-03 ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 ND<0 5 ND<0 5 - - 06-30-03 ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 ND<0 5 ND<0 5 - - MW-6/ 12-28-00 ND<1 ND<1 ND<1 ND<1 ND<5 ND<1 ND<l ND<200 ND<50 20 to 40 ft 03-30-01 ND<1 ND<1 ND<1 ND<1 ND<5 ND<1 ND<1 ND<200 ND<50 06-27-01 ND<1 ND<l ND<1 ND<1 ND<5 ND<1 ND<1 ND<500 ND<50 09-26-01 ND<1 ND<1 ND<1 ND<1 ND<5 ND<1 ND<1 ND<500 ND<50 12-20-01 ND<1 ND<1 ND<1 ND<1 ND<5 ND<1 ND<1 ND<500 ND<50 03-01-02 11 ND<1 ND<1 ND<1 ND<5 ND<50 ND<50 ND<500 ND<50 06-03-02 096 ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<500 ND<50 12-02-02 22 ND<0 5 ND<0 5 ND<0 5 ND<5 ND<0 5 ND<0 5 - - 03-20-03 17 ND<0 5 ND<0 5 ND<0 5 ND<5 ND<0 5 ND<0 5 - - 06-30-03 64 ND<0 5 ND<0 5 12 ND<5 ND<0 5 ND<0 5 - - MW-7/ 12-28-00 ND<50 ND<50 ND<50 ND<50 ND<250 1,200 ND<50 ND<10000 ND<2500 20 to 40 ft 03-30-01 ND<30 ND<30 ND<30 ND<30 ND<150 890 ND<30 ND<6000 ND<1500 06-27-01 ND<10 ND<10 ND<10 ND<10 ND<50 830 ND<10 ND<5000 ND<500 09-26-01 ND<10 ND<10 ND<10 ND<10 ND<50 570 ND<10 ND<5000 ND<500 12-20-01 ND<25 ND<25 ND<25 ND<25 ND<125 590 ND<25 ND<12500 ND<1250 03-01-02 ND<50 ND<50 ND<50 ND<50 ND<250 790 ND<50 ND<25000 ND<2500 06-03-02 ND<50 ND<50 ND<50 ND<50 ND<500 630 ND<50 ND<50000 ND<5000 12-02-02 ND<5 ND<5 ND<5 ND<5 83 480 ND<5 - - 03-20-03 ND<5 0 ND<5 0 ND<5 0 ND<5 0 58 280 ND<5 0 - - 06-30-03 ND<33 ND<33 ND<33 ND<33 ND<330 1 510 ND<33 - - NOTES All water samples reported as micrograms per liter(µg11) FTX— Not Analyzed D1PE Di-isopropyl ether,ETBE ethyl tert butyl ether,MTBE methyl tert butyl ether TAM1i tert amyl methyl ether,TBA tertiary butyl alcohol, 1,2-DCA 1,2-dichloroethane EDB ethylene dibromide