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COLUMBIA ANALYTICAL SERVICES, INC <br /> QA/QC Report <br /> Client EMCON Associates Date Received- 09/02/93 <br /> is Protect: EMCON Project No OG71-038 01 Service Request No SJ93-1 101 <br /> ARCO Facility No 2168 Sample Matrix- Water <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> STE <br /> EPA Methods 5030/8020 <br /> u91L (ppb) <br /> Date Analyzed 09/14/93 <br /> Percent Recovery <br /> Spike CAS <br /> Spike Sample Result Acceptance <br /> Analyte Level Result MS DMS MS DMS Criteria <br /> Benzene 25 ND 254 266 102 106 76-122 <br /> Toluene 25 NO 25 3 263 101 105 75-127 <br /> Ethylbenzene 25 ND 24 9 25 8 100 103 70-135 <br /> Approved by uCDate <br /> 40) l7�nn•u..n.1 Ave... e • C..,. Inca P.,1 F. .. me, 3 - T..���h...... �nG f I n7 n ,nn - r_ .ne 1,•.+ •.••� t <br />