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Tab e 1 Paglof 26 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station 42133 <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/l <br /> MW-5 318195 104 1291 — Al 87 -11 87 1,800 43 47 3 3 60 — — <br /> 6095 1140 — -1036 1 51 1,300 55 27 2 3 75 — - <br /> 9/11195 1365 -- -1261 -225 1,500 87 3 9 1 29 — — <br /> 1215/95 1403 — -1299 -0 38 2,200 120 <10(e) 16 11 — - <br /> 3118196 1082 — -978 321 8,200 190 19 24 800 -- — <br /> 6118196 9 50 — -846 1 32 15,000 170 <25 <25 2,500 <250 — <br /> 9125196 1230 - -1126 -2 80 3,800 130 <5 8 4 71 <50 — <br /> 1214/96 11 63 — -1059 067 4,200 88 <2 15 44 <20 -- <br /> 3119197 P 718 -- -614 445 1,400 26 56 46 98 — 011 <br /> 615197 P 8 84 — -780 -166 1,900 22 51 4 14 <10 017 <br /> 8119197 N P 1025 — -921 -141 <50 <0 5 <0 5 <0 5 <0 5 <5 018 <br /> 11/25/97 NP 10 48 — -944 -0 23 210 <0 5 <05 <0 5 <0 5 <5 — <br /> 3120198 P 427 -- -3 23 6 21 <50 <0 5 <0 5 <0 5 <05 <5 22 <br /> 6124198 Well Box Inaccessable -- — — -- — — — <br /> 9110198 P 7 79 — -675 -- <50 <0 5 <05 <0 5 <0 5 <5 <br /> 12/17/98 P 806 -- -702 -0 27 995 <05 <0 5 <0 5 <05 <5 -- <br /> 3110199 P 586 -- -4 82 220 806 <0 5 <05 <05 <05 <5 28 <br /> 6122199 Well Box Inaccessable -- -- -- — — -- - — — <br /> 9113199 -- Well Box Inaccessable -- -- -- _ -" — -- — — <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 US EPA Method 8015,Modified <br /> MTBE =Methyl Tert-Butyl Ether by USE PA Method 8020 <br /> DO =Dissolved Oxygen <br /> P =Well purged pnor 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 /> I <br /> I <br /> 1 <br /> 077 41727 006/GW Tables <br />