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4v+ 1 5 s V 9 <br /> ROY F WESTON, INC. <br /> STOCKTON ANALYTICAL LABORATORY <br /> ANALYTICAL CASE NARRATIVE <br /> Client: S. J. MOSQUITO ABATEMENT <br /> RFW#: 9208S643 <br /> Test. SW8015(MODIFIED)-TOTAL PURGEABLE PETROLEUM HYDROCARBONS <br /> 1. This narrative covers the analysis of two 2 water <br /> Y ( ) samples in accordance with the <br /> protocols based on The California Luft Manual. <br /> 2. The analytical hold time for this <br /> Yt analysts was met. <br /> 3. Continuing calibration criteria was met for this analysis. <br /> 4. The method blank associated with these samples was free of target analyte <br /> interferences at, or above, the reporting limit. <br /> 5. The surrogate recoveries were within Laboratory Q C. ILsmits. <br /> 6. The blank spike recovery was within acceptable Q.C. criteria <br /> 7. Retention times were within acceptable Q.C. limits. <br /> I <br /> Unit Leader Date <br />