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Roy F Weston, Inc <br /> Stockton Laboratory <br /> Case Narrative <br /> ' Client Treatek <br /> RFW # 91115471 <br /> ' ORGANOCHLORINE PESTICIDES AND PCB' S <br /> 1 This narrative covers the analysis of one sample in accordance <br /> ' with SW-846 , method 8080 <br /> 2 The analytical holding time for this analysis was met <br /> 3 Initial calibration criteria was met for this analysis with <br /> the exception of Endrin, which showed increased sensitivity <br /> Continuing calibration criteria was met for this analysis with <br /> the exception of Endrin, whish showed decreased sensitivity <br /> However, this response factor compared favorably with the <br /> curve <br /> 4 The method blank did not contain any target compounds or <br /> interfering peaks at or above the reporting limits <br /> 5 Surrogate recoveries ( except for samples diluted 10-fold or <br /> more) were within advisory limits . <br /> 6 Blank spike recoveries and the RPD' s for the spikes were <br /> within advisory limits <br /> 7 Matrix spike recoveries could not be calculated because the <br /> extract was highly colored and a diluted analysis was <br /> required <br /> ' 8 A diluted analysis was required for the sample because the <br /> extract was highly colored <br /> 1 <br /> r <br /> G-�- ? /� � <br /> D. D. Jenner Date <br /> Unit Leader <br />