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• <br /> Roy F. Weston, Inc. - Stockton Laboratory <br /> Case Narrative <br /> Client: THORPE OIL <br /> RFW 4: 11785 <br /> FUMIGANTS <br /> 1 . This narrative covers the analysis of one sample in accordance <br /> with method EPA 504-modified. <br /> 2. The analytical holding time for this analysis was met. <br /> 3. Initial and continuing calibration criteria were met for this <br /> analysis. <br /> 4. The method blank did not contain any target compounds at or <br /> above the reporting limits, but did contain an interfering peak <br /> coeluting with EDB on the RTx35 column. <br /> • 5. Surrogates were not used in this analysis. <br /> 6. Blank spike recoveries and the RPD's for the blank spikes were <br /> within the advisory limits. <br /> 7. Matrix spike recoveries and the RPO's for the matrix spikes were <br /> within the advisory limits. <br /> S. All compounds reported positive were confirmed by second column <br /> analysis. A diluted analysis was required for the sample because <br /> of the presence of background matrix peaks. <br /> D. D. Jenner Date <br /> Unit Leader <br />