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COLUMBIA ANALYTICAL SERVICES,INC <br /> QA/QC Report <br /> Client EMCON Associates Service Request S941442 <br /> Project Federated-Frank's Exxon/2520-100 01 Date Collected 11/14/94 <br /> Sample Matrix Water Date Received 11/15/94 <br /> Date Extracted. 11/16,22/94 <br /> Date Analyzed 11/17-24/94 <br /> Surrogate Recovery Summary <br /> TPH as Diesel <br /> EPA Method 3510/Caldorma DHS LUFT Method <br /> Percent Recovery <br /> Sample Name Lab Code p-Tcrphenvl <br /> MW-1 5941442-001 94 <br /> MW-2 5941442-002 99 <br /> MW-3 S941442-003 76 <br /> MW-4 5941442-004 87 <br /> Method Blank 5941116-WB 91 <br /> Method Blank 5941122-WB 94 <br /> CAS Acceptance Limits 66-123 <br /> Approved By Date 4(,jnwZov <br /> suA11062994 <br /> Page 7 of 9 <br /> 1921 Ringwood Avenue Son Jose California 95131 • Telephone 4081437-2400 • fox 4081487 9356 <br />