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TABLE 4 - CONTINUED Analytical Results of Ground Water Samples PACIFIC CAR WASH 4405 Pacific Avenue, Stockton, Callfomia Well I D Date TPH-G Benzene Toluene Ethyl- Xylene MTBE MTBE TAME DIPE E1 BE TBA 1,2-DCA EDB benzene 8020 8260 10-19-98 570 17 71 20 87 12 ND<1 ND<l ND<1 ND<1 ND<5 - - 01-21-99 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 NID<O 5 ND<1 ND<1 ND<1 ND<l ND<5 - - 04-15-99 580 10 41 21 84 ND<1 ND<1 ND<l ND<1 ND<1 ND<5 - - 07-29-99 ND<50 ND<O 5 ND<O 5 ND<O 5 067 ND<O 5 ND<l ND<1 ND<1 ND<1 ND<5 - - 10-12-99 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<1 ND<1 ND<1 ND<1 ND<5 - - 01-20-00 ND<50 ND<O 5 070 ND<O 5 ND<O 5 ND<O 5 ND<1 ND<l ND<t ND<1 ND<5 - - 04-14-00 ND<50 ND<O 5 ND<O 5 IIID<O 5 ND<O 5 ND<O 5 ND<l ND<1 ND<1 ND<1 ND<5 - - 08-17-00 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<50 - - MW-l0B 12-01-00 ND<50 ND<O 5 ND<O 5 ND<O 5 NP-0 5 ND<O 5 ND<1 ND<1 ND (50-55) 03-27-01 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<0 5 ND<1 ND<1 ND<1 ND<1 ND<S - - 06-26-01 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 080 082 ND<O 5 ND<O 5 ND<O 5 ND<20 - - 09-25-01 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 066 ND<l ND<l ND<1 ND<1 ND<5 - - 12-31-01 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 096 15 ND<O 5 ND<O 5 ND<O 5 ND<20 090 ND<O 5 02-14-02 ND<50 ND<O 5 083 ND<O 5 1 8 ND<5 23 ND<l ND<1 ND<1 ND<5 - _ 05-14-02 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 26 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<5 ND<1 ND<1 08-14-02 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 81 62 ND<O 5 ND<O 5 ND<O 5 ND<20 069 ND<O 5 11-25-02 ND<50 ND<O 5 ND<O 5 ND<0 5 ND<O 5 62 66 ND<1 ND<1 ND<l ND<40 2 ND<1 02-25-03 ND<50 ND<2 5 ND<2 5 ND<2 5 ND<2 5 - 130 ND<2 5 1 ND<2 5 ND<2 5 ND<25 ND<2 5 ND<2 5 ` MW-11 11-25-02 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 18 19 ND<O 5 ND<O 5 ND<O 5 ND<20 ND<O 5 ND<O 5 (25-45) 02-25-03 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 - 82 ND<O 5 ND<O 5 ND<O 5 ND<5 0 071 ND<O 5 MW-12 11-25-02 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<20 ND<O 5 ND<O 5 (25-45) 02-25-03 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 - ND<O 5 ND<O 5 t ND<O 5 1 ND<O 5 ND<50 ND<O 5 ND<0 5 Notes All units reported as pg/l(micrograms per liter or parts per billion) TPH total petroleum hydrocarbons ML di-isopropyl ether,ETBE ethyl tertiary butyl ether,TAME tertiary amyl methyl ether,TBA tertiary butanol alcohol,MTBE methyl tertiary butyl ether ND not detected < indicates constituents were not detected at a concentration greater than the reporting limit shown ft bsg feet below surface grade t unmodified or weakly modified gasoline is significant t - r `