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1 <br /> Roy F Weston, Inc . <br /> Stockton Laboratory <br /> Case Narrative <br /> Client TREATER <br /> RFW ## 91125471 <br /> ' CHLORINATED HERBICIDES <br /> 1 This narrative covers the analysis of one sample in accordance <br /> ' with method SM 509B--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 or <br /> interfering peaks at or above the reporting limits <br /> ' 5 Surrogates were not used in this analysis <br /> 5 Blank spike recoveries were within the advisory limits , with <br /> the exception of 2 , 4 , 5-TP, which was low in both spikes The <br /> RPD' s for the blank spikes were within the advisory limits <br /> 7 Matrix spike recoveries were within the advisory limits , with <br /> the exception of 2 , 4 , 5-TP, which was low in both spikes The <br /> RPD' s for the matrix spikes were within the advisory limits <br /> S Confirmation by second column analysis was not required <br /> because no target compounds were detected in the sample <br /> 1 <br /> D. D. Jenner Date <br /> Unit Leader <br />