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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report _ . .. <br /> Client: EMCON Associates Service Request: S941424 <br /> Project: TOSCO#11192 1 0952-090.02 Date Collected: 11/9,10194 <br /> Sample Matrix: Soil Date Received: 11/11/94 <br /> Date Extracted: NA <br /> Date Analyzed: 11/15/94 <br /> Surrogate Recovery Summary <br /> Halogenated Volatile Organic Compounds <br /> EPA Methods 5030/8010 <br /> Percent Recovery <br /> Sample dame Lab Code 4-Bromofluorobenzene <br /> 11192-THP4S-25 S941424-002 118 <br /> 11192-THPIS-25 S941424-004 123 <br /> 11192-TH1'2S-25 5941424-006 104 <br /> 11192-THP3 S-25 S941424-008 106 <br /> Method Blank 5941115-SB 103 <br /> CAS Acceptance Limits: 79-141 <br /> Approved By: L' Date: `2 3-1' <br /> SUP IM62994 <br /> Page 15 of 15 <br />