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COLUMBIA ANALYTICAL SERVICES, INC <br /> QA/QC Report <br /> Client EMCON Associates Inc Date Collected* 03/04/94 <br /> Protect: 2481-100 01/DSS Eng Contractors Date Received 03/09/94 <br /> Sample Matnx Soil Date Extracted NA <br /> Date Analyzed: 3/14/94 <br /> Service Request SJ94-0288 <br /> Surrogate Recovery Summary <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/Caldorraa DHS LUFT Method <br /> Percent Recovery <br /> Sample Name Lab Code a a a-Tnfluorotoluene <br /> P2-R 940288-1 100 <br /> Method Blank 940314-SMB 104 <br /> CAS Acceptance Limits 59-115 <br /> Approved By tG7✓t! Date arc` Z2 <br /> 940288 XLSr&22t94 Page No r'k <br /> L <br /> 1991 R,nowood AvPnt1P • Son lase ColifnmICLgr JJ • Tolonhnna_AflliLd}7 7dflf! • Fn. An8m.17 O'l5h <br />