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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QAIQC Report <br /> Client- EMCON Semce Request: L952343 <br /> Project ARCO Products Company 4 21681#0805-146 04 Date Collected: NA <br /> LCS Matrnz. Water Date Received: NA <br /> Date Extracted: NA <br /> Date Analyzed: 5116195 <br /> Laboratory Control Sample Summary <br />' BTEX and TPH as Gasoline <br /> EPA Methods 503018020/Modified 8015/Californsa DHS LUFT Method <br /> Units mg/L(ppm) <br /> CAS <br /> Percent <br />' Recovery <br /> True Percent Acceptance <br /> Analyte Value Result Recovery Limits <br /> Benzene 00800 00762 95 39-150 <br /> Toluene 00800 00912 102 46-148 <br />' Ethylbcnzene 00800 00883 110 32-160 <br /> TPH as Gasoline 200 2 15 108 70-140 <br /> b, <br /> NA Not Applicable <br /> TPH Total Petroleum Hydrocarbons <br />?Approved By Date �9 <br />' LC9.52 9� <br /> L932M3%LS 80201cs 3/19/95 pyo No 07 <br /> 7 <br /> 6925 CANOCA AVENUE CANOCA PARK, CA 91303 11 818 587 5550 0 FAX 818 587-5555 <br />