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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: EMCON Associates Service Request: 5941491 <br /> Project: TOSCO# 11195 10952-093.02 Date Collected: 11/18/94 <br /> Sample Matrix: Water Date Received: 11/21/94 <br /> Date Extracted: NA <br /> Date Analyzed: 11/23/94 <br /> Surrogate Recovery Summary <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/California DHS LUFT Method <br /> Percent Recovery <br /> Sample Name Lab Code a,a,o-Trilluorotoluenc <br /> 11195-HP 1-W S941491-001 106 <br /> 11195-HP2-W 5941491-002 103 <br /> Method Blank S941123-WB 101 <� <br /> CAS Acceptance Limits: 69-116 <br /> F <br /> Approved By: 1 � <br /> Date: <br /> SURIM67"4 <br />