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COLUMBIA ANALYTICAL SERVICES, INC <br /> QA/QC Report <br /> Client: EMCON Associates Date Received. 12/18/92 <br /> Project: EMCON Project No OG71-038 01 Service Request No.: SJ92-1604 <br /> ARCO Facility No 21:68 Sample Matnx: Water <br /> Surrogate Recovery Summary <br /> Halogenated Volatile Organic Compounds <br /> EPA Methods 5030/601 <br /> Sample Name Date Analvzed Percent Recovery <br /> 4-Bromofluorobenzens <br /> MW-1 (54) 12/21/92 112. <br /> MW-2 (53) 12/21/92 105 <br /> MW-3 (53) 12/21/92 111 <br /> . MW-1 (54) MS 12/21/92 115. <br /> MW-1 (54) DMS 12/21/92 117. <br /> Method Blank 12/21/92 108. <br /> CAS Acceptance Criteria 70-130 <br /> Approved try: Date: _A�A3� �I II7L <br /> 12 <br />