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Ta02 <br /> Historical Groundwater Monitoring and Analytical Data <br /> 7-Eleven Store#17334 <br /> 4501 North Pershing Avenue <br /> Stockton CA <br /> Well IDI Ethyl- MtBE I I Dissolved <br /> Elevation Date Benzene Toluene Benzene Xylene TPHg TPHd 8020 MtBE TBA DIPE EtBE TAME Notes Oxygen DTW SPTWTE <br /> OC WIL) (1491L) (P (WL) (WL) (N ) (WL) WIL) ) (NgIL) WIL) ( /L) (m L) (feet) (fed) (feet <br /> Groundwater Grab Samples <br /> GP3 02/20/97 21 <0 5 <0 5 055 930 - 1,700 -- - - - - - - - - <br /> GP4 02/20/97 9,100 33,000 3,900 24,000 150,000 - 100,000 84,000 - - - -- - -- - - <br /> GP7 02120/97 <0 5 <0 5 <0 5 <0 5 <50 - <5 - - - - - - - - - <br /> SB-1@50' 04/03/02 28 180 100 650 7,100 - -- 67 <50 <20 <20 <20 -- - - - <br /> Monitoring Well Samples <br /> MW-1 <br /> 7 34 12/19/97 1,200 1,100 580 1,500 15,000 -- 9,900 14,000 <4,000 <1,000 <1,000 <1,000 02 18 93 0 00 -11 59 <br /> 03/22/98 2,200 3,400 880 3,200 23,000 -- -- 11,000 <10,000 <500 <500 <500 02 1430 000 -696 <br /> 06/15/98 5,000 7,200 1,700 8,800 52,000 - - 21,000 <10,000 <500 <500 <500 1 5 1443 000 -709 <br /> 08/25/98 -- -- -- .. .. -- -- .. -- -- - - -- -- -- - <br /> Well destro ed 08/14/98 and re laced by MW-5A on 08/25/98 <br /> MW-1A <br /> 7 26 12/19/97 41 88 56 270 2,600 -- 280 350 <100 <25 <25 <25 01 1888 000 -1162 <br /> 03/22/98 15 6 1 13 65 560 -- -- 360 <500 <25 <25 <25 02 1423 000 -697 <br /> 06/15/98 85 89 084 63 <100 -- -- 31 <100 <5 <5 <5 18 1437 000 -711 <br /> 08/25/98 -- -- -- -- -- -- -- -- <br /> Well destroyed 08/14/98 and replaced by MW-5B on 08/25/98 <br /> 117-EfevenV-11 Stores1173341Tables117334 Current Groundwater AsHisstoncal Water Page 1 of 7 <br />