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TABLE 1 Page 11 of 12 <br /> GROUNDWATER DATA <br /> SHELL-BRANDED SERVICE STATION <br /> 4315 WATERLOO ROAD <br /> STOCKTON,CALIFORNIA <br /> 1,2 DCA=1,2-Dichloroethane,analyzed by EPA Method 8260B <br /> EDB=1,2-Dibromoethane,analyzed by EPA Method 8260B <br /> TOC=Top of casing elevation(Elev)in feet relative to mean sea level(MSL) <br /> SPH=Separate-Phase Hydrocarbons <br /> t GW=Groundwater <br /> t <br /> DO=Dissolved Oxygen <br /> gg/L=Micrograms per liter(parts per billion) <br /> ppm=Parts per million <br /> ft.=Feet <br /> <n=Below detection limit <br /> -=Not applicable <br /> a=TOC elevation altered during wellhead maintenance. <br /> b=Hydrocarbon does not match pattern of laboratory's standard. <br /> c=Analyzed out of holding time. <br /> d=Quantity of unknown hydrocarbon(s)in sample based on gasoline. <br /> e=The concentration reported reflect(s)individual or discrete unidentified peaks not matching a typical fuel pattern. <br /> f=Estimated value. The concentration exceeded the calibration of analysis. <br /> g=Analyte was detected at a concentration below the reporting limit and above the laboratory method detection limit. Reported value is estimated. <br /> h=The result for this hydrocarbon is elevated due to the presence of single analyte peak(s)in the quantitation range. <br /> i The concentration indicated for this analyte is an estimated value above the calibration range of the instrument. <br /> j=Analyzed by EPA Method 8015B(M). <br /> k=The sample chromatographic pattern for TPH does not match the chromatographic pattern of the specified standard. Quantitation of the unknown hydrocarbon(s)in tl <br /> based upon the specified standard. <br /> Ethanol analyzed by EPA Method 8260B. <br /> Site surveyed December 20,2001 by Virgil Chavez Land Surveying of Vallejo,CA. <br /> Wells MW-5 through MW-7 surveyed on January 25,2006 by Virgil Chavez Land Surveying of Vallejo,CA. <br /> Wells MW-2,MW-3,MW-4 MW-6 and MW-7 are being sampled on an annual basis,as of April 20,2009 letter from San Joaquin County Environmental Health Department <br /> recommending annual groundwater sampling. <br /> OZA241359(14) <br />