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SERVICES, INC'. <br /> COLUMBIA ANALYTICAL Ir rlf <br /> I <br /> ,, Client: EMCON Associates Date Received: 08/11/92 <br /> Project: EMCON'Project No. G71-33.01 :` W6rk Order #: SJ92.0716, <br /> Arco'Facility No. 54.8 Sample Matrix: Water <br /> QA/QC Report <br /> Matrix Spike/Duplicate Matrix Spike Summary <br />• BTE <br /> EPA Methods 5030/8020 <br /> ug/L (ppb) <br />• ; <br /> Date Analyzed: 06/15/92 <br /> 1 • <br />• Percent Recovery <br /> Sample Spike Result Acceptance <br /> —Analytes Spike Level Re ul MS DMS MS DMS Criteria <br />• Benzene 500. 9. 522. 529. 103. 104, 39-150 <br /> Toluene 500. 69. 605. 625. 107. 111. 46-148 <br /> Ethylbenzene 500. 45. 583. 598. 108. 111 . 32-160 <br /> II <br /> Approved by Lill-d-r _ Date <br /> 7 <br />