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YUMM'.f y(pOEOMlLL'M <br /> ROY F. WESTON, INC. <br /> STOCKTON ANALYTICAL LABORATORY <br /> ANALYTICAL CASE NARRATIVE <br /> Client: PACIFIC ENERGY <br /> RFW#: 92065060 <br /> Test: 0602-PURGEABLE AROMATICS <br /> 1. This narrative covers the analysis of one (1) water sample in accordance with <br /> protocols based on EPA method 602. <br /> 2. The analytical holding time for this analysis was met. <br /> 3. Continuing calibration criteria was met for this analysis. <br /> 4. The method blanks associated with this sample did not contain any target analytes <br /> at, or above, the reporting limits. <br /> 5. Surrogate recoveries were within Laboratory QC limits. <br /> 6._, _ -Blank spike recoveries were within Laboratory QC limits. <br /> 7. Retention times were within QC tolerance limits. - <br /> 8. Confirmation by second column analysis was performed on the sample. <br /> 9. The analyte Chlorobenzene and 1,2-Dichlorobenzene seemed to be positive in this <br /> analysis but were reported as non-detected analytes due to the presence of interfering <br /> peaks. However, these analytes were detected above reporting limits and reported <br /> as positive hits in a 601 analysis performed at a lower dilution. <br /> 'Unit Leader <br /> Date <br />