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COLUMBIA ANALYTICAL SERVICES, INC <br /> QAIQC Report <br /> Client EMCON Associates Date Collected: 314194 <br /> Protect 2481-100 01/13SS Construction Date Received: 3116194 <br /> Sample Matrix: Soil Date Extracted: ND <br /> Date Analyzed: 3117, 18194 <br /> Service Request: SJ94-0314 <br /> Surrogate Recovery Summary <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/California DHS LUFT Method <br /> Percent Recovery <br /> Sample Name Lab Code a a a-Trifluorotoluene <br /> T-1 940314-1 80 <br /> T-3 940314-2 92 <br /> T-4 940314-3 93 <br /> T-0 940314-4 84 <br /> T-8 940314-5 107" <br /> T-8 (MS) 940317-MS 113 <br /> T-8 (DMS) 940317-DMS 90 <br /> Method Blank 940317-SMB 102 <br /> Method Blank 940318-SMB 93 <br /> CAS Acceptance Lunits 62-112 <br /> * The surrogate used for this sample was 4- Bromofluorobenzene <br /> Approved By <br /> 440314 XL5/3l29/94 Page NO <br /> 40')4 Rinnwnnd Avantla . [nn {, or ^.e • TolAn�••,-- +nGIAn 7 •)Ar)fl [-,=An%kf l7 01Sf, <br />