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COLUMBIA ANALYTICAL SERVICES, INC. <br /> Client: EMCON Associates Date Received: 05/04/91 <br /> . Submitted By: Client Work Order #: SJ91-0767 <br /> Project: Nor Cal Beverage/G05-01.01 Sample Matrix: Water <br /> QA/QC Report <br /> Surrogate Recovery Summary <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/DHS LUFT Method <br /> Sample Name Date Analyzed Perceryt Recovyy <br /> 4-Bromofluorobenzene <br /> MW-1 06/05/91 91. <br /> Method Blank 06/06/91 91. <br /> CAS Acceptance Criteria 70-140 <br /> TPH Total Petroleum Hydrocarbons <br /> Approved by <br /> l L Date_ <br /> 6 <br /> 1921 Ringwood Avenue + Son Jose. Coiifornia 95131 • Teiephone 4081437-2400 Fox 4081487-9056 <br />