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' COLUMBIA ANALYTICAL SERVICES INC. <br /> QA/QC Report <br /> Client: EMCON Service Request: L952343 <br /> Project: ARCO Products Company#2168/#0805-146 04 Date Collected: NA <br /> Sample Matrix: Soil Date Received: NA <br /> Date Extracted: NA <br /> tDate Analyzed: NA <br /> Surrogate Recovery Summary <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/Modified 8015/Califorma DHS LUFI'Method <br /> 1 <br />' Percent Recovery Percent Recovery <br /> Sample Name Lab Code 4-Bromofluorobenzene a,a,a-Trifluorotoluene <br /> SP-1 L952343-001 76 79 <br /> Method Blank L952343-MB 110 110 <br /> Matrix Spike L952322-IMS 99 89 <br /> Duplicate Matrix Spike L952322-IDMS 100 86 <br /> 1 <br /> 1 <br /> CAS Acceptance Ltrruts 60-130 60-140 <br />' NA Not Apphcable <br /> Approved By Date <br />' SU95234 94 <br /> L95230.7CLS 8020ry Y 1419 Page No 05 <br /> 6925 CANOGA AVENUE ■ CANOGA PARK, CA 91303 ■ 818 587-5550 FAX 818 587-5555 <br />