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• <br /> COLUMBIA ANALYTICAL SERVICES, INC. <br /> QA,QC =ncr, <br /> i; Client: EMCON Associates Date Received: 12/22/93 <br />• Project- EMCDN Project No. OG71-033.01 Service Request No.: SJ93-1565 <br /> ARCO Facility No. 548 Sample Matrix: Water <br />• <br /> Surrogate Recovery Summary <br /> STEX and TPH as Gasoline <br /> EPA Methods 5030/8020/Ca,ifornia RHS LUFT Method <br />• <br /> Sample Name Date Ana! zed Percent Recovery <br /> a,a,a-Trifluorotoluene <br />• <br /> MW-1 (56) 12127;93 97, <br /> MW-2 (61) 12/27/93 88. <br /> MW-3 (62) 12/27/93 84. <br /> MW-4 (63) 12/27/93 85. <br /> MW-5 (60) 12127;93 99. <br />• MW-6 (58) 12/27,19385. <br /> MS 12/27/93 92. <br /> DMS 12/27!93 89. <br /> Method Blank 12/271;.13 $5. <br />• <br /> CAS Acceptance Criteria 70-130 <br />• <br />• <br />• ID <br />• Approved by: Date: <br /> 9 <br />