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TABLE 4 Page 13 of 13 <br /> GROUNDWATER DATA <br /> SHELL-BRANDED SERVICE STATION <br /> 2494 EAST FREMONT STREET <br /> STOCKTON,CALIFORNIA <br /> e=Hydrocarbon does not match pattern of laboratory's standard. <br /> f=On the December 30,2003 Chain of Custody,well 5-3-84 incorrectly listed as 5-3-85 and well 5-4-83 incorrectly listed as 5-4-85. <br /> g=The concentration reported reflects individual or discrete unidentified peaks not matching a typical fuel pattern <br /> h=Extracted out of holding time. <br /> i=Concentration is greater or equal to the Method Detection Limit but lower than the Reporting Limit. <br /> j=The opening calibration verification standard was outside acceptance criteria by 23%. Although the Laboratory Control Sample verified the accuracy of the batch,this should be considered when <br /> evaluating the data. <br /> k=There was insufficient preservative to reduce the sample pH to less than 2. The sample was analyzed within 14 days of sampling but beyond the 7 days recommended for Benzene,Toluene, <br /> and Ethylbenzene. <br /> 1=The reporting limit for this analyte has been raised to account for matrix interference. <br /> m=Sample was diluted due to the presence of high levels of non-target analytes resulting in elevated reporting limits. <br /> n=The result was reported with a possible high bias due to the continuing calibration verification falling outside the acceptance criteria. <br /> o=Reporting limit raised due to sample matrix effects. <br /> p=Sample analysis performed past the EPA recommended holding time. <br /> q=Reporting limit raised due to high concentrations of non-target analytes. <br /> r=pH=7 <br /> s=pH=6 <br /> t=Analyzed by EPA Method 8015B(M). <br /> u=The sample chromatographic pattern for TPH does not match the chromatographic pattern of the specified standard. Quantitation of the unknown hydrocarbon(s)in the sample was based <br /> upon the specified standard. <br /> v=Analyte was detected at a concentration below the reporting limit and above the laboratory method detection limit. Reported value is estimated. <br /> w=Reporing limits raised due to laboratory error;samples inadvertently processed by TestAmerica's Nashville laboratory which utilizes a report limit of 10,000 ug/L for Methanol by method 8015B. <br /> Ethanol and Methanol analyzed by EPA Method 8260B. <br /> Site surveyed January 8,2000 by Virgil Chavez Land Surveying of Vallejo,CA. <br /> Site surveyed January 14,2002 by Virgil Chavez Land Surveying of Vallejo,CA. <br /> Wells 5-1-851 5-3-84,and 5-4-83 surveyed December 23,2002. <br /> Wells 5-2-85,S-5,and S-6 surveyed December 23,2002. <br /> CRA240797(18) <br />