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COLUMBIA ANALYTICAL SERVICES, INC. <br /> QA/QC Report <br /> Client: EMCON Associates Date Received: 03/05/93 <br />• <br /> Project: EMCON Project No.1 1 OG71-033.01 Service Request No.: SJ93-0322 <br /> ARCO Facility No. 548 Sample Matrix: Water ' <br />• <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> BTE <br /> EPA Methods 5030/8020 <br />• <br /> p9/- (ppb) <br /> Date Analyzed: 03/10/93 <br /> i <br /> Percent Recovery <br /> Spike CAS <br /> Spike Sample Result Acceptance <br /> Analyte Level Result NIS DWIS MS DMS C feria <br /> Benzene 5,000. 636. 5,670. 5,680. 101. 101. 39-150 <br /> Toluene 5,000. 1,690. 7,090. 7,040. 108. 107. 46-148 <br /> Ethylbenzene 5,000. 3,830. 9,390. 9,400. 109. 111. 32-160 <br />• <br /> I <br />• <br /> Approved by: lL Date: <br /> 7 <br />