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COLUMBIA ANALY'T'ICAL SERVICES INC., <br /> f <br /> QA/QC Report <br /> Client: EMCON Associates Service Request: 5941510 <br /> Project: TOSCO#11193/0952-091.02 Date Collected: 11/22/94 <br /> Sample Matrix: Water Date Received: 11/22/94 <br /> Date Extracted: NA <br /> Date Analyzed: 11/28,29/94 <br /> Surrogate Recovery Summary <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/California DHS LUFr Method <br /> Percent Recovery <br /> Sample Name Lab Code a,a,a-Trifluorotoluene <br /> 11193-THP 1 W-25 5941510-007 101 <br /> 11193-THP2 W-21 S941510-008 101 . <br /> Method Blank 5941128-WB 102 <br /> Method Blank 5941129-WB 109 <br /> CAS Acceptance Limits: 69-116 <br /> Approved By: M IV4 <br /> Date: &(M �Ov <br /> stsxtraz"4 <br />