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CSK Auto#4025 GeoTek Project No.:BC 122-4025 <br /> Tracy,California 95376 Page 4 of 5 <br /> March 7,2000 <br /> 3.0 DATA ANALYSIS & INTERPRETATION <br /> Analysis and interpretation of the data generated during the field sampling and laboratory <br /> testing is presented in the following sections. Where appropriate, the results are compared <br /> with regulatory limits for the chemicals and compounds identified in the applicable <br /> media. <br /> 3.1 LABORATORY ANALYTICAL RESULTS <br /> The analytical results of the soil sampling are summarized in Table 1, below. <br /> TABLE 1. SOIL SAMPLE ANALYTICAL DATA SUMMARY <br /> Laboratory Total Extractable <br /> Sample Identification Date Sampled Reporting Limit Fuel Hydrocarbons <br /> (mg/kg) (mg/kg) <br /> 4025/SB-1/9'-10' 02/17/00 5.0 ND <br /> 4025/SB-2/4'-5' 02/17/00 5.0 ND <br /> 4025/SB-3/4'-5' 02/17/00 5.0 5.0 <br /> MCL -- -- RBA <br /> Notes: <br /> mg/kg milligrams per kilogram <br /> ND Concentrations not detected above laboratory reporting limit <br /> MCL Maximum Contaminant Level <br /> RBA Risk Based Assessment is required by the State of California to determine Maximum Contaminant Levels. <br /> 3.2 DISCUSSION OF SAMPLE ANALYTICAL DATA <br /> Based on the soil sample analytical data presented above, the following information is <br /> presented: <br /> • Elevated levels of TPH have been detected in one of the three samples analyzed. The <br /> positive sample was located adjacent to the oil water separator. The TPH analyzed is <br /> indicative of a Petroleum Product Release. The State of California requires that a <br /> Risk Based Assessment be conducted to determine the MCLs of the TPH detected in <br /> soil. <br />