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Pa 2 of 2 <br /> • Tab <br /> Groundwater Elevation and Analytical Hata <br /> Former ARCO Service Station#4493 _ <br /> 205 North Center Street <br /> Stockton,California <br /> Well Depth Groundwater Change in TPH as Ethyl- <br /> Well Date Elevation to Water Elevation Groundwater Gasoline Benzene Toluene benzene Xylenes MtBE MtBE(8260) DO <br /> Number Sampled <br /> (feet,MSL) feet TOG) (feeMSL) (feet,MS ) {PPb} (ppb) (ppb) {PPb? (ppb) {PPb} {Pb m 1L <br /> 06/19100 P 12.03 12.98 -0.95 - <50 2.75 <0.500 <0,500 <0.500 <2.50 <2.0 209 <br /> MW-0 09119100 P 13.66 -1.62 -0.67 <50 1.19 <0.500 <0.500 <0.500 <2.50 <2.0 0.6 <br /> 06/19/00 P 13.26 13.81 -0.55 - <50 1.87 <0.500 0.523 2.34 171 144 183 <br /> MW-6 09119/00 P 14.56 -1.30 -0.76 <50 1.30 <0.500 <0.500 <0.500 119 102 0.7 <br /> 06/19/00 P 11.07 11.87 -0.80 -- <50 <0.500 <0.500 <0.500 <0.500 <2.50 <2.0 1.78 <br /> MW-7 09119/00 P 12.69 -1.52 -0.72 <50 <0.500 <0.600 <0.600 <0.500 <2.50 <2.0 1.0 <br /> TOC =Top of casing <br /> MSL =Mean Sea Level <br /> TPH =Total petroleum hydrocarbons <br /> MtBE =Methyi tert-butyl ether <br /> DO =Dissolved oxygen <br /> 8260 =determined by(USEPA Method 8260) <br /> Ppb =Parts per billion <br /> mgll =milligrams per liter <br /> P =Well purged prior to sample collection <br /> NP =Well not purged prior to sample collection <br /> -- =Not measured or sampled <br /> < =below detection limit <br /> 1 <br />