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COLUMBIA ANALYTICAL SERVICES, INC <br /> QA/QC Report <br />. Client. EMCON Associates Date Received 11/01/93 <br /> I Project- EMCON Project No OG71-038 01 Service Request No SJ93-1339 <br /> ARCO Facility No 2168 Sample Matrix. Water <br /> I <br /> Surrogate Recovery Summary <br /> Halogenated Volatile Organic Compounds <br /> EPA Methods 5030/601 <br /> I <br /> Sample Name Date Analyzed Percent Recovery <br /> 4-Bromofluorobenzene <br /> I <br /> MW-1 (54) 11/03/93 115 <br /> MW-2 (53) 11/03/93 95 <br /> MW-3 (54) 11/03/93 1 13 <br /> MW-4 (59) 11/03/93 122 <br /> MW-5 (55) 11/03193 99 <br /> MW-6 (47) 11/03/93 116 <br /> MW-7 (48) 11/03/93 97 <br /> MW-3 (54) MS 11/03/93 1 13 <br /> MW-3 (54) DMS 11/03/93 121 <br />' Method Blank 11/03/93 1 10 <br /> CAS Acceptance Criteria 70-130 <br /> I <br /> i <br /> i <br /> 1 Approved by Date <br /> 15 <br />