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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: EMCON Associates <br /> Project: TOSCO# 11195 1 0952-093.02 Service Request: 5941491 <br /> Date Collected: 11/18/94 <br /> Sample Matrix: Water Date Received: 11/21/94 <br /> Date Extracted: NA <br /> Date Analyzed: 11/23,28/94 <br /> Surrogate Recovery Summary <br /> Halogenated Volatile Organic Compounds <br /> EPA Methods 5030/8010 <br /> Percent Recovery <br /> Sample Name Lab Code 4-Bromofluorobenzene <br /> 11195-HPI-W 5941491-001 90 <br /> 11195-HP2-W S941491-002 101 <br /> Method Blank 5941123-WB <br /> 91 <br /> Method Blank 5941128-WB 115 <br /> CAS Acceptance Limits: 76-13$ <br /> f <br /> e <br /> Approved By: <br /> Date: <br /> SURIAdM94 <br /> Page 9 of 9 <br />