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COLUMBIA ANALYTICAL SERVICES,INC <br /> QA/QC Report <br /> Chent. ARCO Products Company Service Request: L9901977 <br /> Protect. WA#24406 0016020-Manteca Date Collected: NA <br /> Sample Matrix Soil Date Received: NA <br />' Date Extracted, NA <br /> Date Analyzed. NA <br /> Surrogate Recovery Summary <br />' BTEX and TPH as Gasoline <br /> Prep Method EPA 5030 Units PERCENT <br />' Analysis Method 8021B/8015M Basis Wet <br /> Test Percent Recovery <br /> Sample Name Lab Code Notes 4-Bromofluorobenzene 4-Bromofluorobenzene <br />' T-2-S(16') L9901977-001 97 96 <br /> T-3-S(16') L9901977-002 100 97 <br />' T-2-M(16') L9901977-003 101 95 <br /> T-3-M(16') L9901977-004 93 88 <br /> T-2-N(16') L9901977-005 101 96 <br /> T-3-N(16') L9901977-006 90 90 <br /> T-1-S(16') L9901977-007 92 88 <br /> T-1 N(16') L9901977-008 105 100 <br />. Method Blank L990502-MB 79 92 <br /> Method Blank L990503-MB 99 96 <br /> T-2 M(16') L9901977-003MS 111 107 <br /> T-2-M(16') L9901977-003DMS 110 110 <br /> Lab Control Sample L990502-LCS 116 98 <br /> Lab Control Sample L990503-LCS 107 97 <br /> CAS Acceptance Limits 60-130 60-140 <br /> Approved By Date <br />' <br /> SUR21061197p ell <br /> 01977VOH <br /> 019TNOH.A81 SU3L2(2)5/4/94 page NO <br />