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COLUMBIA ANALYTICAL SERVICES INC <br /> . QA/QC Report <br /> Client EMCON Associates Date Received 08/04/93 <br /> Project. EMCON Project No OG71-029 01 Service Request No SJ93-0960 <br /> ARCO Facility No 2130 Sample Matrix Water <br /> Matrix SoikerDuplicate Matrix Spike Summary <br /> BTE <br /> EPA Methods 5030/8020 <br /> ,u9Jt (Ppb) <br /> Date Analyzed 08/10/93 <br /> Percent Recovery <br /> Spike CAS <br /> Spike Sample Result Acceptance <br /> Analyte Level Result MS DMS MS DMS Criteria <br /> Benzene 25 ND 25 2 23 9 101 96 76-122 <br /> Toluene 25 ND 25 8 24 6 103 ?8 75-127 <br /> Ethylbenzene 25 SND 243 22 9 97 92 70-135 <br /> Approved by �b�! �I L �'y Dace �l✓� ���` ��� <br />