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COLUMBIA ANALYTICAL SERVICES, INC. <br /> QA/QC Report <br /> Client: EMCON Associates <br /> Service Request: S941406 7 <br /> Project: TOSCO # 1 1 191 1 0952-089.02 Date Collected: 11/8/94 j <br /> Sample Matrix: Soil Date Received: 11/9/94 <br /> Date Extracted: NA <br /> Date Analyzed: 11/14,15194 <br /> Surrogate Recovery Summary 1 <br /> BTEX and TPH as Gasoline <br /> EPA Methods 503018020/California DHS LUFT Method <br /> I <br /> h <br /> l <br /> I <br /> Percent Recovery <br /> Sample Name Lab Code a,a,a-Trifluorotoluene <br /> x <br /> 1 <br /> 11191-TD-1 <br /> 5941406-008 96 <br /> I 1191-TD-2 S941406-009 95 } <br /> Method Blank S941114-SB 93 r <br /> f <br /> i <br /> I <br /> i� <br /> I <br /> F <br /> 1 <br /> yy <br /> 1 <br /> r <br /> ..._ k <br /> CAS Acceptance Limits: 59-115 , <br /> L <br /> i <br /> Approved By: Date: <br /> suaunaiM r- k <br /> Page 9 of.11 <br />