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COLUMBIA ANALYTICAL SERVICES, INC. <br /> QA/QC Report <br /> Client ARCO Products Company Service Request* L9901978 <br /> Project- WA#f 24406 0016020-Manteca Date Collected: NA <br /> Sample Matrix: Sod 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 /> SP-1 L9901978-001 89 85 <br /> SP-2 L9901978-002 87 83 <br /> SP-3 L9901978-003 91 87 <br /> SP-4 L9901978-004 80 79 <br /> SP-5 L9901978-005 73 69 <br /> SP-6 L9901978-006 84 80 <br /> SP-7 L9901978-007 88 86 <br /> SP-8 L9901978-008 98 95 <br /> SP-9 L9901978-009 89 85 <br /> SP-10 L9901978-010 87 84 <br /> Method Blank L990502-MB 79 92 <br /> Method Blank L990503-MB 99 96 <br /> Batch QC L9901977-003MS 111 107 <br /> Batch QC L9901977-003DMS 110 110 <br />' Lab Control Sample L990502-LCS 116 98 <br /> Lab Control Sample L990503-LCS 107 97 <br /> 1 <br /> CAS Acceptance Lnntts 60-130 60-140 <br /> Approved By �� Date rl`F I t <br /> 01978VON ABI SUR2(2)514/99 Page No <br />