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COLUMBIA ANALYTICAL SERVICES, INC. <br /> f <br /> Client: EMCON Associates Date Received: 05/29/91 <br /> _ Submitted By: Client Work Order #: SJ91-0751 <br /> Project: Nor Cal Beverage/G05-01.01 Sample Matrix: Soil <br /> QA/QC Report <br /> Surrogate Recovery Summary <br /> BSDC and TPH as Gasoline <br /> EPA Methods 5030/8020/DHS LUFr Method <br /> Sample Name Date Analyzed PercInt Recoym <br /> 4-Bromotluorobenzene <br /> MW-1 1744-18' 05/30/91 92. <br /> MW-1 41-411/2' 05/30/91 105. <br /> Method Blank 05/30/91 79. <br /> CAS Acceptance Criteria 70-140 <br /> TPH Total Petroleum Hydrocarbons j <br /> Approved by GG Date <br /> S <br /> 1921 Ringwood Avenue • Son Jose. Colifomio 95131 • Telephone 4081437-2400 • Fox 4081437-9354 <br />