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Ta� Paoof 30 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station 02133 <br /> 2908 Benjamin Holt Dr Stockton California <br /> Well Depth Product Groundwater Groundwater Total <br /> Date Elevation to Water thickness, Elevation Elevation change TPH-G Benzene Toluene Ethylbenzene Xylenes MTBE DO <br /> Sampled (feet,MSL) (feet,TOC) in feet (feet,MSL) (feet) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) mg/I <br /> MW-5 318195 104 12 91 — -1187 -1187 1,800 43 4 7 33 60 -- <br /> 612195 1140 — -1036 1 51 1,300 55 27 23 75 — <br /> 9/11195 1365 -- -1261 -225 1 500 87 3 9 1 29 -- <br /> 1215/95 1403 — -1299 -038 2,200 120 <10(e) 16 11 -- <br /> 3118/96 1082 — -978 321 8200 190 19 24 800 -- <br /> 6118/96 950 — -846 132 15,000 170 <25 <25 2,500 <250 <br /> 9125/96 1230 — -11 26 -280 3,800 130 <5 84 71 <50 <br /> 1214196 1163 — -1059 067 4,200 88 <2 15 44 <20 — <br /> 3/19197 P 718 — -614 445 1,400 26 56 4 6 9 8 01 <br /> 615197 P 884 — -7 80 -166 1,900 22 51 4 14 <10 02 <br /> 8119197 NP 1025 — -921 -141 <50 <0 5 <0 5 <0 5 <0 5 <5 02 <br /> 11/25/97 NP 1048 — -944 -023 210 <0 5 <0 5 <0 5 <0 5 <5 -- <br /> 3120198 P 427 -323 621 <50 <0 5 <0 5 <0 5 <0 5 <5 22 <br /> 6124/98 Well Sox Inaccessable -- — — _ — — — — <br /> 9110198 P 779 — -675 <50 <0 5 <0 5 <0 5 <0 5 <5 <br /> 12/17/98 P 806 — -702 -027 995 <0 5 <0 5 <0 5 <0 5 <5 <br /> 3110199 P 586 — -4 82 220 806 <0 5 <0 5 <0 5 <0 5 <5 2 8 <br /> 6122199 — Well Box lnacoessable — — -- — — <br /> 9113199 -- Well Box Inaccessable — -- -- — — — -- — <br /> 12/16/99 P 925 — -821 186 096 <0 5 <0 5 1 03 <2 5 33 <br /> 3123100 P 4 61 — -357 -- 355 0 620 <0 5 <0 5 128 <25 20 <br /> a =Corrected water-level elevation value where free product is present(WIc=Wlm+(b)(p)),where Wlc=water-level elevation corrected,Wlm=water level elevation measured <br /> b=hydrocarbon thickness(in feet),p=specific gravity(0 7)of hydrocarbon <br /> — =Indicates not measured or not calculated <br /> TPH-G =Total Petroleum Hydrocarbons as Gasoline by USEPA Method 8015,Modified <br /> MTBE =Methyl Tert-Butyl Ether by USEPA Method 8020 <br /> DO =Dissolved Oxygen <br /> P =Well purged prior to sample collection <br /> NP =Well not purged prior to sample collection <br /> TOC =Top of Casing <br /> MSL =Mean Sea Level <br /> BTEX Distinction by USEPA Method 8020 <br /> Wells E-3 E-4,E-5,E-6,E-7,PR-2,BHD-2 MW-1,MW-2,and MW-3 on a semi-annual sampling schedule <br /> 077 41930 8011GW Tables <br />