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COLUMBIA ANALYTICAL SERVICES, INC. <br /> Client: EMCON Associates Date Received: 06/04/91 <br /> Submitted By: Client Wont Order *: SJ91-0787 <br /> Project: Nor Cal Beverage/G05-01.01 Sample Matrix: Water <br /> QA/OC Report <br /> Surrogate Recovery Summary <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/DHS LUFT Method <br /> Sam le Name Date Analyzed Percent Recovery <br /> 4-Bromofl uorobenzene <br /> MW-1 06/06/91 91. <br /> • Method Blank 06/06/91 91. <br /> CAS Acceptance Criteria 70-140 <br /> TPH Total Petroleum Hydrocarbons <br /> .i <br /> i <br /> �f f <br /> Approved by l ` Date_ <br /> 6 <br /> .1921 Ringwood Avenue • Son Jose. Colffornia 95131 • Telephone 408/437-2400 • Fox 4081437.9356 <br />