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05/04/99 11:26 FAX 818 587 5555 CAS/CANOGA PARK Z015 <br /> 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 /> BTEX and TPH as Gasoline <br /> Prep Method: EPA 5030 Units: PERCENT <br /> Analysis Method: 8021B/8015M Basis: Wct <br /> Test Percent Recovery <br /> Sample Name Lab Code Notes 4-Bromofluorobenzene 4-13romotluorobcnzene <br /> SPA L9901978-001 99 85 <br /> SP-2 L9901979-002 87 83 <br /> SP-3 L9901978-003 91 87 <br /> SPA L9901978-004 80 79 <br /> SP-5 L9901976-005 73 69 <br /> SP-6 1,9901978-006 84 80 <br /> SP-7 L9901978-Uu7 88 86 <br /> SP-8 L9901978-008 98 95 <br /> SP-9 L9901978-009 89 85 <br /> SP-10 L9901978-010 87 $4 <br /> Method Blank L990502-MB 79 92 <br /> Mcthod Blank 1,990503-MB 99 96 <br /> Batch QC; L9901977-003MS 111 1U7 <br /> Ranch QC 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 /> SU927wi ml, <br /> 0197E V011AD 1•SOU('-)513A1v Page No <br />