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COLUMBIA ANALYTICAL SERVICES, INC <br /> QA/QC Report <br /> Client EMCON <br /> Service Request: 5950534 <br /> Prnleu ARCO Faciliv, No 2093/EMCON Project No 1775-706 001 Date Collected: 4/25-26/95 <br /> Sample i'vIatrit Water Date Received: 4/28/95 <br /> Date Extracted: NA <br /> Date Analvzed: 5/4/95 <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> BTE <br /> EPA Methods 5030/8020 <br /> Units ug/L(ppb) <br /> Sample Name ATR-2 (28) <br /> lab Code 5950534-002 <br /> Percent Recover -* <br /> CAS Relative <br /> Spike Level Sample Spike Rciult Acceptance Percent <br /> Anaivte MS DMS Result MS DMS MS DMS [.units Difference <br /> 3cnzcne 25 25 ND 270 265 108 106 75-135 2 <br /> Toluene 25 25 ND 264 256 106 102 73-136 3 <br /> Ethvibenzene 25 25 ND 269 260 108 104 69-142 3 <br /> Approved B% 1� L�M <br /> Date �"!L• I� <br /> DVI S 1 57060 1 94 <br /> 0534 xL5 wptrms i u 95 <br /> Pie■-*tin <br /> 1921 Ringwood Avenue Son Jose Collforrna 95131 + Teleohone 408/437-2400 0 Fox 4081437-9356 <br />