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Table 2 Groundwater Analytical Data 440 West Charter Way, Stockton, CA Ethyl- Well Date TPHg Benzene Toluene benzene Xylenes MTBE Number Sampled (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) MW-16 10/22/93 ND ND ND ND ND NA MW-16 03/16/94 -- -- - - -- -- MW-16 06/15/94 - -- -- -- MW-16 09/22/94 -- -- -- -- MW-16 12/01/94 -- - -- - -- -- MW-16 02/16/95 <50 <0 5 <0 5 <0 5 <0 5 NA MW-16 05/17/95 <50 <0 5 <05 <0 5 0 79 NA MW-16 08/15195 <50 <0 5 <0 5 <0 5 <0 5 <10 MW-16 11/16/95 <50 <0 5 <0 5 <0 5 <0 5 NA MW-16 02/27/96 <50 <0 5 <0 5 <0 5 <0 5 NA MW-16 05/15/96 <50 <0 5 <0 5 <0 5 <0 5 NA MW-16 08/22/96 -- -- -- - -- -- M WA 6 11/25/96 - -- -- -- -- -- MW-16 02/24197 -- -- - -- - MW-16 05/19/97 - -- -- - -- -- MW-16 08/22/97 -- -- -- - -- -- MW-16 11/18/97 Well Dry MW-16 02/09/98 Well Dry MW-17 09/20/93 1,100 140 4 8 51 63 NA MW-17 03/16/94 -- - - -- MW-17 06/15/94 -- - - - -- -- MW-17 09/22/94 -- -- -- -- -MW-17 12101/94 MW-17 02/17/95 210 057 079 <0 5 <0 5 NA MW-17 05/17/95 130 <0 5 <0 5 <0 5 <0 5 NA MW-17 08/15/95 <50 <0 5 <0 5 <0 5 <0 5 <10 MW-17 11/16/95 31D 99 <0 5 7 2 <0 5 NA MW-17 02/27/96 770 79 48 60 51 NA MW-17 05/15/96 4,100 780 50 300 130 NA MW-17 08/22/96 <50 1 1 <0 5 <0 5 <0 5 <30 MW-17 11/25/96 <50 <0 5 0 80 062 53 <30 MW-17 02/24/97 340 75 <0 5 16 11 <30 MW-17 05/19/97 64 <0 5 <0 5 <0 5 <0 5 <30 MW-17 08/22/97 <50 <0 5 <0 5 <0 5 <0 5 <30 MW-17 11/18/97 <50 <0 5 <0 5 <0 5 <0 5 <30 MW-17 02/09/98 <50 <0 5 <0 5 <0 5 <0 5 <30 MTBE = Methyl-tert-butylether NA= Not Analyzed ppb= arts per billion TPHg =Total petroleum hydrocarbons-a§-gasoline SP =Separate-phase petroleum hydrocarbons ND = Not detected at or above the method detection limit --= Not sampled <= Less than the detection limit for the specified method of anal sus Page 13 of 13