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Table <br /> 1i Page 1 of 31 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station#2133 <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 Xyienes MtBE DO <br /> Sampled (feet,MSL) (feet,TOC) in feet (feet,MSL) (feet) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) mgt[ <br /> MW 5 6121100 P 696 -- -592 -235 <50 <0 5 <0 5 <0 5 <0 5 <2 5 0 2 <br /> (cont) 9113100 P 868 -7 64 -172 <50 <05 <0 5 <0 5 <0 5 <2 5 2 41 <br /> 12/15/00 P 816 -- -712 0 52 <50 0 <0 500 <0 500 <0 500 <0 500 <2 50 0 83 <br /> 312/01 P 610 .. -5 06 2 06 <50 0 <0 500 <0 500 <0 500 <0 500 <2 50 35 <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 /> =Indicates not measured,not calculated,or not analyzed For product thickness,indicates no SPH detected <br /> TPH-G =Total Petroleum Hydrocarbons as Gasoline by USEPA Method 8015,Modified <br /> MtBE =Methyl tort-Butyl Ether by USEPA Method 8020 <br /> DO =Dissolved Oxygen ppb=parts per billion <br /> P =Well purged prior to sample collection mgll=milligrams per liter <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 are on a semi-annual sampling schedule <br /> I <br /> 1 <br />