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COLUMBIA ANALYTICAL SERVICES, INC. <br /> QA/QC Report <br /> Client: EMCON Associates Service Request: 5941491 <br /> Project: TOSCO # l 1 195 /0952-093.02 Date Collected: 11/18/94 <br /> Sample Matrix: Water Date Received: 11/21/94 <br /> Date Extracted: 11/22/94 <br /> Date Analyzed: 11/24/94 <br /> Surrogate Recovery Summary <br /> Hydrocarbon Scan <br /> EPA Method 3510/California DHS LUFT Method <br /> Percent Recovery <br /> Sample Name Lab Code p-Terphenyl <br /> 11195-HP 1-W 5941491-001 gg <br /> 11195-HP2-W 5941491-002 97 <br /> Method Blank S941122-WB 94 <br /> CAS Acceptance Limits: 66-123, <br /> Approved By: Date: <br /> svxirosiv9< <br /> Page 7 of 9 <br />