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Woodward-Clyde <br /> V Ms. Linda Turkatte <br /> San Joaquin County Environmental Health Division <br /> August 5, 1996 <br /> 6, Page 6 <br /> ANALYTICAL RESULTS <br /> �. Analytical laboratory results of the four soil samples collected below the north end of the <br /> former UST, indicate that diesel contaminated soil has been successfully removed from the site. <br /> Non-detectable concentrations of all analytes tested were reported for the four soil samples <br /> �. (Table 1). The analytical laboratory reports are attached to this letter report for reference. <br /> DATA REVIEW <br /> 6. <br /> Soil samples KRST-1, KRST-2, KRST-3, KRST-4 (field duplicate of KRST-3) were submitted <br /> to Inchcape Testing Services for analysis of total petroleum hydrocarbons (TPH) as diesel using <br /> `r modified Method 8015 and BTEX using Method 8020. Samples were received intact at 4°C as <br /> identified in Laboratory Report Number 9604322. A data review of the following evaluation <br /> �. criteria was performed: holding times, method and trip blank contamination, laboratory control <br /> sample (LCS) recoveries, matrix spike/matrix spike duplicate (MS/MSD) recoveries, and <br /> surrogate recoveries. <br /> V <br /> Samples were analyzed within the method-prescribed holding times. The method blanks and <br /> trip blanks (BTEX only) associated with the samples listed above had nondetect results reported <br /> �• for TPH as diesel and BTEX. The analytical accuracy within the sample matrix was evaluated <br /> using surrogate recoveries for p-Bromofluorobenzene (BTEX) and o-Terphenyl (TPH). <br /> Surrogate recoveries were within the laboratory-established acceptance criteria. Laboratory <br /> control sample recoveries for TPH as diesel and BTEX were within the laboratory established <br /> acceptance criteria. MS/MSD analysis was performed on sample KRST-1. Recoveries and <br /> relative percent differences for TPH as diesel and BTEX were within laboratory established <br /> acceptance criteria. Accuracy and precision for TPH as diesel was also assessed using the LCS <br /> and LCS duplicate results, which met the laboratory established evaluation criteria for TPH as <br /> diesel. <br /> Sample KRST-4 was a field duplicate of Sample KRST-3. All target analytes were reported as <br /> nondetect and relative percent differences were not calculated. These data were found to be <br /> acceptable for their intended use, with no qualifications as a result of the data review criteria. <br /> V <br /> V <br /> V <br />