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A <br /> Historical Groundwater Monitoring and Analytical Data <br /> 7 Eleven Store#17334 <br /> 4501 North Pershing Avenue <br /> Stockton CA <br /> Well ID! Ethyl- MtBE Dissolved <br /> Elevation Date Benzene Toluene Benzene Xylene TPH9 TPHd 8020 MtBE TBA DIPS EtBE TAME Notes Oxygen DTW SPT WTE <br /> TOC (P9tL) (119,L) (Vg1L (Pg/L) (119,L) ( ) ( ) (Vg/L) (Pg L) V9tL) (P9n-i [4�9/L) fm ) (feet) feet) (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 02/20/97 <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 /> i 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 1893 000 -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 15 1443 000 -709 <br /> 08/25/98 -- -- -- -- — — __ _ — — — — — — <br /> Welk destro ed 08/14/98 and re laced by MW-5A on 08/25/98 <br /> MW-IA <br /> 726 12/19/97 41 88 56 270 2,600 — 280 350 <100 <25 <25 <25 01 1888 000 -1162 <br /> 03/22/98 15 61 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-56 on 08/25/98 <br /> 117-Eleven%7-11 Stores1173347ables117334 Current Groundwater xlsHistotncal Water Page 1 of 7 <br />