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I <br /> L `/ 1% / <br /> L ROY F. WESTON, INC. <br /> STOCKTON ANALYTICAL LABORATORY <br /> L ANALYTICAL CASE NARRATIVE <br /> Client: HYPONEX-LINDEN <br /> RFW #: 94045897 <br /> L TOTAL EXTRACTABLE HYDROCARBONS <br /> 1 1. This narrative covers the analysis of 17 samples in accordance with protocols <br /> based on California LUFT Manual, October 1989. <br /> 1 ' The analytical holding time for this analysis was met. <br /> L ... <br /> 3. Initial and continuing calibration criteria were met by the standards associated <br /> L with the samples covered by this report. <br /> 3. The method blank associated with these samples did not contain any target <br /> L compounds at or above the reporting limit. <br /> p 5. Surrogate recoveries for n-Eicosane (except for samples diluted 10-fold or more) <br /> L were within advisory limits,,with the exception of sample SBI-15' which had 129% <br /> recovery. <br /> 1 <br /> r,. 6. The recoveries for the blank spikes were within advisory limits. The RPD was <br /> within advisory limits. <br /> 6. 7. The recoveries for the matrix spikes were within advisory limits. The RPD for the <br /> spikes was within advisory limits. <br /> k <br /> g- The results for the original analysis of samples of SB3-5' and its field duplicate <br /> SB3-5'DUP were inconsistent. The samples were reextracted and reanalyzed. No <br /> Extractable Hydrocarbons were detected in either sample SB3-5'-RE or its <br /> duplicate SB3-5'DUP-RE. The different results for the original analysis and <br /> reanalysis are attributed to sample variability. <br /> V <br /> Dale E. Gimble/Unit Leader Date <br /> 1 <br /> r <br /> r <br />