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COLUMBIA ANALYTICAL SERVICES, INC. <br /> Client: EMCON Associates Date Received: 05/29/91 <br /> • Submitted By: tient Work Order #: SJ91-0751 <br /> Project: Nor Cal Beverage/G05-01,01 Sample Matrix: Sail <br /> QA/QC Report <br /> Surrogate Recovery Summary <br /> BTEC and TPH as Gasoline <br /> EPA Methods 5030/8020/DHS LUFT Method <br /> Sample Name Date Anal ed Percent Recovery <br /> 4-Bromofluorobenzene <br /> MW-1 171/2-1 B' 05/30/91 92• <br /> MW-141-411/2' 05/30/91 105• <br /> Method Blank 05/30/91 79. <br /> CAS Acceptance Criteria 70-140 <br /> TPH Total Petroleum Hydrocarbons <br /> Approved by Date—A <br /> _ <br /> 6 <br /> 1921 Ringwood Avenue Son Jose. ColHornio 95131 9 Telephone 408!437-2400 • Fox 4081437.9356 <br />