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• Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station No 2093 <br /> 3425 Tracy Boulevard Tracy California <br /> Well Depth Groundwater Groundwater Product Ethyl- Xylenes <br /> Well Date Elevation to Water Elevation Elevation Thickness TPHg Benzene Toluene benzene (total) MIZE DO <br /> Number Sampled (ft,MSL) (ft,TOC) (ft MSL) Change(ft) (ft) _(1,y/L) tpg ) (P91L) {pg/L) (pcyL) (PPL) (mg&)_ <br /> Notes — - - <br /> A = groundwater elevation corrected by adding 0 77 X product thickness M1BE = Methyl Cert butyl ether <br /> < = below given laboratory detection limit PMP = purged/not purged <br /> = not measured or analyzed(in case of product thickness none found) TB 1 = Trip Blank <br /> = analyzed using EPA Method 8260B TOC = top of casing <br /> DO = Dissohred oxygen TPHg = Total petroleum hydrocarbons as gasoline <br /> It = feet (reported as GAO gasoline range organics) <br /> mg/L = milligrams per Inter pg/L = micrograms per Inter <br /> MSL = mean sea level <br /> (a) = top of casing altered and casing not resurveyed,water level measured from highest point of casing <br /> 1 = Hydrocarbon pattern Is present in the requested fuel quantitation range but not resemble the pattern of the requested fuel <br /> Data Quallfler Definitions <br /> U The analyte was analyzed for but was not detected above the sample reporting limit <br /> J The analyte was positively identilied the associated numerical value is the approximate concentration of the analyte in the sample <br /> N The analysts indicates the presence of an analyte for which there is presumptive evidence to make a"tentative identification" <br /> NJ The analysts indicates the presence of an analyte that has been"tentatively identified"and the associated numerical value represents its approximate <br /> concentration <br /> W 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 /> ND Not detected above reported detection limit <br /> is1Wpixe®U5RPAROMD2093\0i IMIA401A0312093GWMi4003 Page 14 of 14 <br />