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COLUMBIA ANALYTICAL SERVICES, INC. <br /> QA/QC Report <br /> Client: EMCON Service Request: K9504048 <br /> Project: Tosco-Tracy/2788-100.002 Date Collected: 6/29/95 <br /> Sample Matrix: Water Date Received: 6/30/95 <br /> Date Extracted: NA <br /> Date Analyzed: 7/2,3/95 <br /> Surrogate Recovery Summary <br /> Halogenated Volatile Organic Compounds <br /> EPA Methods 5030A/8010A <br /> Percent Recovery <br /> Sample Name Lab Code <br /> Bromochloromethane <br /> — HP-1 K9504048-001 109 <br /> HP-2 K9504048-002 107 <br /> HP-3 K9504048-003 111 <br /> Method Blank K9504048-MB 109 <br /> CAS Acceptance Limits: 38-131 <br /> Approved By: Date: <br /> surtmozEsa <br /> 4G VOA DMI-SURE 7nM5 <br /> eadNll !; 1 n <br />