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1 <br /> COLUMBIA ANALYTICAL SERVICES, INC , <br /> QA/QC Report <br /> Client: EMCON Semce Request: 5950304 <br /> Project ARCO Facility No 2133 / EMCON Project No 1775-709 01 Date Collected: 3/8/95 <br /> SAMple Matrix Nater Date Received- 3/10/95 <br /> Date Extracted: NA <br /> Date Analvzed: 3/17/95 <br /> Matrix SpikeiDuplicate Matrix Spike Summary <br /> BTE <br /> EPA Methods 5030/8020 <br /> Units ug/L (ppb) <br /> Sample Name BHD-1 (27) <br /> Lab Code S9503044003 <br /> Percent Recovery <br /> CAS Relative <br /> Spike Level Simple Spike Result Acceptance Percent <br /> Analvte MS DMS Result MS DMS MS DMS Limits Difference <br /> Benzene 500 500 84 3 528 528 89 89 75-135 <1 <br /> Toluene 500 500 62 428 437 84 86 73-136 2 <br /> Ethvlbenzcnc 500 500 298 749 751 90 91 69-142 <1 <br /> I <br />• <br /> Approved Hv J11140t� a4-11 Date <br /> WfSIS/050194 <br /> Page 8 <br /> 1921 Rlnowood Avpn+lP + inn losp C'nllfnrrnn 054' 4 • Tcice�k AiIA/A17 14nn • r-v MIA/A'17 01';A <br />