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• • i <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station No,5450 <br /> 1617 West Fremont Street,Stockton,California <br /> Well Depth Groundwater Groundwater Ethyl. Xylenes <br /> Weil Date PINP Elevation to Water Elevation Elevation TPHg Benzene Toluene benzene (total) MtBE* DO <br /> Number _Sampled_ (ft,MSL) (ft,TQC) (ft,MSL) Change(ft) (pglL) "IL) (pgll) 04&) _WL) (44111L) (mglL) <br /> MW-2 9/11/2002 P 8.67 11.37 -2.70 - 98 <0.5 <0.5 <0.5 <0.5 62 -- <br /> 11127/2002 P 10.90 -2.23 0.47 <50 <0.5 <0.5 <0.5 <0.5 43 2.2 <br /> 3/14/2003 P 10.60 -1.93 0.30 <50 <0.5 <0.5 <0.5 <0.5 28 5.2 <br /> 4/24/2003 P 10.72 -2.05 -0.12 <50 <0.5 <0.5 <0.5 <0.5 30 2.4 <br /> 8/14/2003 P 11.30 -2.63 -0.58 <50 <0.5 <0.5 <0.5 <0.5 18 2.3 <br /> 11/6/2003 11.68 -3.01 -0.38 <50 <2.5 <2.5 <2.5 <2.5 36 2.2 <br /> MW-3 9/1112002 P 8.77 11,35 -2.58 -- <50 <0.5 <0.5 <0.5 <0,5 0.77 -- <br /> 11127l2002 P 11.17 -2.40 0.18 <50 <0.5 <0.5 <0.5 <0.5 <0.5 1.8 <br /> 3!14!2003 P 10.48 -1.71 0.69 <50 <0.5 <0.5 <0.5 <0.5 <0.5 05 <br /> 4/24/2003 P 10.50 .1.73 -0.02 <50 <0.5 <0,5 <0.5 <0,5 <0.5 2.8 <br /> $11412003 P 11.23 •2.46 -0.73 <50 <0.5 <0,5 <0.5 <05 <0.5 2.1 <br /> 1116/2003 11.56 -2.79 -0.33 <50 <0.5 <0.5 <0.5 <0,5 <0.5 1.8 <br /> MW-4 9/11/2002 P 8.66 11.34 -2.68 -- <50 <0.5 <0.5 <0.5 <05 <0.5 -- <br /> 11/27/2002 P 11.19 -2.53 0.15 <50 <0.5 <0.5 <0.5 <0.5 <0.5 1.1 <br /> 3/14/2003 P 10.60 .1.94 0,59 <50 <0.5 <0.5 <0.5 <0,5 0,69 1.5 <br /> 4/24/2003 P 10.77 -2.11 -0.17 <50 <0.5 <0.5 <0.5 <0.5 0.66 2.7 <br /> 8/14/2003 P 11.28 -2.62 -0.51 <50 <0.5 <0.5 <0.5 <0.5 1.5 2.6 <br /> 11/612003 11.46 -2.80 -0.18 <50 <0.5 <0.5 <0.5 <0.5 1.4 2.7 <br /> i <br /> Notes: <br /> < = below given laboratory detection limit MtBE = Methyl ted-butyl ether <br /> = not measured or calculated P1NP = purged/not purged <br /> = analyzed using EPA Method 8260 TPI-Ig = Total petroleum hydrocarbons as gasoline(reported as GRO-gasoline range organics) <br /> DO = Dissolved oxygen TOC = top of casing <br /> ft = feet pglL = micrograms per liter <br /> mg1L = milligrams per liter <br /> Data Qualifier Definitions: <br /> U The analyte was analyzed for,but was not detected above the sample reporting limit. <br /> J The analyte was positively Identified;the associated numerical value is the approximate concentration of the analyte in the sample. <br /> N The analysis indicates the presence of an analyte for which there is presumptive evidence to make a`tentative identification." <br /> NJ The analysis indicates the presence of an analyte that has been"tentatively identified"and the associated numerical value represents Its approximate <br /> concentration. <br /> UJ The analyte was not detected above the reported sample reporting limit. However,the reported reporting limit is approximate and may or may not <br /> represent the actual limit of quantitation necessary to accurately and precisely measure the analyte in the sample. <br /> R The sample results are rejected due to Identification or other analytical issues. <br /> NO Not detected above reported detection limit <br /> K:1WprocessU5 BP ARCOW545MWarteflM QTR 0NWO GWMR 4003 1 of 1 <br />