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' COLUMBIA ANALYTICAL SERVICES, INC. <br /> QA/QC Report <br /> Client EVMCON Service Request S950693 <br />' Project Teichert-Stockton/OF90-002 004 Date Collected 5130195 <br /> Sample Matrix Water Date Received 6/1195 <br /> Date Extracted NA <br />' Date Analyzed 619195 <br /> Surrogate Recovery Summary <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030180201Caltforma DHS LUFT:Method <br /> Percent Recovery <br /> ' Sample Name Lab Code u,a,cc-Tnfluorotoluene <br /> MW-9 5950693-001 92 <br /> VIW-10 5950693-002 89 <br /> MW-1.1 S950693-003 92 <br /> '\4W-14 S950693-004 101 <br /> Method Blank 5950609-WB1 87 <br /> ' CAS Acceptance Linuts 69-116 <br /> Approved B-v Date <br /> SL AW062994 i•r• <br /> 0693 XLS GBTX SM 6114,95 Page No <br />