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4MGFR! .i5 NERI JNIU+M! <br /> ROY F. WESTON, INC. <br /> STOCKTON ANALYTICAL LABORATORY <br />' ANALYTICAL CASE NARRATIVE <br />' Client: SAN JOAQUIN COUN"T"Y <br /> RFW #: 9304S564 <br /> FUMIGANTS <br /> 1 This narrative covers the analysis of 5 samples in accordance with protocols based <br /> on EPA Method 504. <br /> 2. The analytical holding time for this analysis was met. <br /> 3 Calibration criteria is required to be met on at least one column for each target <br /> compound, and on both columns for any compound reported positive Initial and <br /> continuing calibration criteria were met for this analysis. <br /> 4 The method blank associated with these samples did not contain any target <br /> compounds at or above the reporting limits. <br /> 5. Surrogate recoveries, except for samples diluted 10-fold or more, were within <br /> advisory limits <br /> 6. The recovery for the blank spike was within advisory limits. <br />' 7 Matrix spikes were not performed on any of the samples covered by this report <br /> 8 Confirmation by second column analysis was not required because no target <br /> compounds were detected in the samples. A diluted analysis was required for <br /> samples MW-8, MW-5, MW-4 and MW-7 because of the presence of <br /> background matrix peaks. <br /> Dale E. Gimble/Unit Leader Date <br />