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i <br /> 4 <br /> ROY F WESTON, INC <br /> STOCKTON ANALYTICAL LABORATORY <br /> ANALYTICAL CASE NARRATIVE <br /> Client SAN JOAQUIN COUNTY <br /> RFW# 9306SO33 <br /> Test SW8015(MODIFIED)-TOTAL PURGEABLE PETROLEUM HYDROCARBONS <br /> I This narrative covers the analysis of seven (7) water samples in accordance with the <br /> protocol~ based on The California Luft Manual <br /> 2 The analytical hold time for this analysis was met <br /> 3 The continuing calibration criteria was met for this analysis <br /> 4 The method blank associated with these samples were free of target analyte <br /> interferences at, or above, the reporting limit <br /> 5 Surrogate recoveries were within Laboratory Q C limits <br /> 6 Blank spike recoveries were within acceptable Q C criteria <br /> I7 1 he matrix ,pike,, were not requested by this client <br /> - 8 Retention times were within acceptable Q C limits <br /> I <br /> 1 <br /> 2z <br /> D G1MBL.E\Unit Leader Date <br />