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COLUMBIA ANALYTICAL SERVICES, INC <br /> QA/QC Report <br /> r Client EMCON Associates Date Received 03/12/93 <br /> Project EMCON Project No OG71-038 01 Service Request No SJ93-0368 <br /> ARCO Facility No 2168 Sample Matrix Water <br /> Surrogate Recovery Summary <br /> Halogenated Volatile Organic Compounds <br /> EPA Methods 5030/601 <br /> E <br /> Stele Namg Date Analyzed Percent Recovery <br /> 4-Bromofluorobenzene <br /> MW-1 (54) 03/16/93 97 <br /> MW-2 (53) 03/16/93 99 <br /> MW-3 (53) 03/16/93 93 <br /> MW-4 (591 03/16/93 100 <br /> MW-5 (55) 03/16/93 100 <br /> MW-1 (54) MS 03/16/93 123 <br /> MW-1 (54) DMS 03/16/93 128 <br /> Method Blank 03/16/93 87 <br /> CAS Acceptance Criteria 70-130 <br /> i <br /> Approved by Date <br />