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COLUMBIA ANALYTICAL SERVICES, INC <br /> QA/QC Report <br /> Client: ARCO Products Company Service Request: L9901977 <br /> Project. WA#24406 0016020-Manteca Date Collected. NA <br /> Sample Matrix: Soil Date Received: NA <br /> Date Extracted: NA <br /> Date Analyzed* 5/2/99 <br /> Matrix Spike/Duplicate Matrix Spike Summary , <br /> BTEX and TPH as Gasoline <br /> Sample Name T-2-M(16') - Units mg/Kg(ppm) <br /> Lab Code L9901977-003MS, L9901977-003DMS Bass Wet ' <br /> Test Notes <br /> Percent Recovery <br /> CAS Relative <br /> Prep Analysis Spike Level Sample Spike Result Acceptance Percent Result <br /> Analyte Method Method MRL MS DMS Result MS DMS MS DMS Lmuts Difference Notes ' <br /> Benzene EPA 5030 8021B 0 005 0 0127 0 0127 ND 0 0107 0 00973 84 77 39-150 10 <br /> Toluene EPA 5030 - 8021B 0 005 0 140 0 140 ND 0 119 0 107 85 76 46-148 11 <br /> Ethylbenzene EPA 5030 8021B 0 005 00352 00352 ND _ 00210 00189 60 54 32-160 _ 12 _ <br /> TPH as Gasoline EPA 5030 8015M 01 200 200 ND 1 24 112 62 56 70-140 11 A4 <br /> 1 <br /> A4 Outside of acceptance limits The LCS was acceptable,therefore,data was approved <br /> Approved By r Date S f J 4 7 <br /> DMS1020597p Page No e <br /> 019MOHABI DMS Sd4/99 <br />