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f <br /> COLUMBIA ANALYTICAL SERVICES, INC <br /> QAIQC Report <br /> Client EMCON Associates Date Received 08/20/93 <br /> 1 Project EMCON Project No OG71-050 01 Service Request No SJ93-1035 <br /> ARCO Facility No 2076 Sample Matrix Water <br /> 1 <br /> Surrogate Recovery Summary <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/California DHS LUFT Method <br /> 1 <br /> Sample Name Date Analyzed Percent Recovery <br /> a,a,a-Trifluorotoluene <br /> MW-1 (61) 08/26/93 94 <br /> MW-2 (62) 08/26/93 95 <br /> MW-3 (62) 08/26/93 96 <br /> MW-4 (62) 08/26/93 96 <br /> • MS 08/26/93 96 <br /> DMS 08/26/93 99 <br /> Method Blank 08/26/93 99 <br /> CAS Acceptance Criteria 70-130 <br /> Approved by Date �� J <br /> 5 <br />