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COLUMBIA ANALYTICAL SERVICES,INC. 4 <br /> QA/QC Report <br /> Client: EMCON Assoicates Service Request: 5941002 <br /> Project* Federated Franks-Exxon/2520-100 01 Date Collected: 9/2/94 <br /> Sample Matni. Water Date Received: 9/6/94 <br /> Date Extracted: NA <br /> Date Analyzed. 9/13,14/94 <br /> Surrogate Recovery Summary <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/Califonua DHS LUFT Method <br /> I <br /> Percent Recovery <br /> Sample Name Lab Code a,a,a-Tnfluorotoluene <br /> MW-1 5941002-001 98 <br /> MW-2 S941002-002 96 <br /> MW-3 S941002-003 105 <br /> MW-4 S941002-004 107 <br /> MW-5 S941002-005 95 <br /> MW-6 5941002-006 93 <br /> MW-7 5941002-007 96 <br /> MW-8 5941002-008 96 <br /> MW-9 5941002-009 98 <br /> DW-1 5941002-010 92 <br /> MW-2(MS) 5941002-002MS 104 <br /> MW-2(DMS) 5941002-002DMS 107 <br /> Method Blank 5940913-WB 93 <br /> Method Blank 5940914-WB 96 <br /> I <br /> CAS Acceptance Limits 69-116 <br /> Approved By �l d Date <br /> suR1/062994 <br /> Page 8 of 11 <br /> 1921 Ringwood Avenue • Son Jose Californo 95131 9 Telephone 408/437 2400 0 Fox 408/437-9356 <br />