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05/04/99 11:27 FAX 818 587 5555 CAS/CANOGA PARK _ Z017 <br /> COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: ARCO Pruducts Company Service Request: L9901978 <br /> Project: WA#24406.0016020-Manteca Date Collected: NA <br /> LCS Matrix: Soil Date Received- NA <br /> Date Extracted: NA <br /> Date Analyzed: 5/2/99 <br /> Laboratory Control Sample Summary <br /> BTEX and TPH as Gasoline <br /> Sample Name: I.ab Control Samplc Units: mglKg(ppm) <br /> Lab Code- L990502-LCS Basis: war <br /> Test Notes: <br /> CAS <br /> Percent <br /> Recovery <br /> Prep Analysis True Percent Acceptance Result <br /> Analyte Method Method Value Result Recovery Limits Notes <br /> Benzcnc El'A 5030 8021B 0.0400 0.0436 109 39-150 <br /> Toluene EPA 5030 8021B 0.0400 0.0484 121 46-148 <br /> Ethylknzene EPA 5030 8021B 0.0400 0.0442 110 33-160 <br /> TPI.1 ac Gasoline 17PA 5030 8015M 2.00 2.13 106 70-140 <br /> r <br /> Approved By: lj Date: <br /> LCY020597p <br /> 01a1W0HA81-LCS 51311-4 <br /> Page No <br />