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TABLE 3 -9NTINUED Analytical Results of Ground Water Samples PACIFIC CAR WASH 4405 Pacific Avenue, Stockton, California Ground Screen Ethyl- MTBE MTBE Well I D Date Water Interval TPH-G Benzene Toluene benzene Xylene 8020 8260 TAME DIPE ETBE TBA Depth ft bs 1049-98 2753 570 17 71 20 87 12 ND 01-21-99 2741 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND 04-15-99 23 50 580 10 41 21 84 ND 07-29-99 2606 ND<50 ND<O 5 ND<O 5 ND<O 5 067 ND<O 5 ND 10-12-99 2753 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<1 ND 01-20-00 27 80 ND<50 ND<O 5 070 ND<O 5 ND<O 5 ND<O 5 ND<l ND 04-14-00 22 80 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND MW-IOB 08-17-00 2576 50 to 55 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<0 5 ND<O 5 ND<O 5 ND<O 5 ND<50 12-01-00 2756 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<l ND 03-27-01 2726 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND 06-26-01 2823 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 0 80 082 ND<O 5 ND<O 5 ND<O 5 ND<20 09-25-01 30 44 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 066 ND<1 Nl}<l ND<1 ND 12-31-01 3058 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 096 is ND<O 5 ND<O 5 ND<O 5 ND<20 02-14-02 2981 ND<50 ND<O 5 0 83 ND<O 5 18 ND<5 23 ND<1 ND 05-1±02j 2957 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 Notes All units reported asµg/1(micrograms per liter or parts per billion) TPH total petroleum hydrocarbons DIPE di-isopropyl ether,PTBE 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 glade unmodified or weakly modified gasoline is significant I Advanced GeoEnvtronmental,Inc E