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COLUMBIA ANALYTICAL SERVICES,INC <br /> QA/QC Report <br /> Client ARCO Products Company Service Request- L9901978 <br /> Project. 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 /> Oxygenates <br /> Prep Method EPA 5030 Units PERCENT <br /> Analysis Method 826013 Basis wet <br /> Test P e r c e n t R e c o v e r y <br /> Sample Name Lab Code Notes Dlbromofluoromethane Toluene-D8 4-Bromotluorobenzene <br /> SP-1 L9901978-001 79 97 121 <br /> SP-2 L9901978-002 95 111 111 <br /> SP-3 L9901978-003 95 97 117 <br /> SP-4 L9901978-004 107 91 105 <br /> SP-5 L9901978-005 89 104 110 <br /> SP-6 L9901978-006 89 83 90 <br /> SP-7 L9901978-007 94 97 120 <br /> SP-8 L9901978-008 104 94 86 <br /> SP-9 L9901978-009 96 99 I18 <br /> SP-10 L9901978-010 92 116 107 <br /> Method Blank L990501-MB 102 104 88 <br /> Method Blank L990502-MB 100 110 115 <br /> Batch QC L9901977-001 MS 101 112 90 <br /> Batch QC L9901977-OOIDMS 89 111 120 <br /> Lab Control Sample L990501-LCS 93 112 103 <br /> Lab Control Sample L990502-LCS 87 113 115 <br /> i <br /> 1 <br /> iCAS Acceptance Lttmts 70-130 81-117 74-121 <br /> Approved By �—�� Date S ,X A S <br /> 01978VOA HW I SUF.7 514m Page No <br />