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COLUMBIA ANALYTICAL SERVICES, INC <br /> OA/QC Report <br /> Client- EMCON Associates Date Received 12/1892 <br /> Project- EMCON Project No OG71-038 01 Service Request No SJ92-1604 <br /> Arco Facility No 2168 <br /> Initial Calibration Venfication <br /> Halogenated Volatile Organic Compounds <br /> EPA Methods 5030/601 <br /> Nanograms <br /> Date Analyzed 12/21/92 <br /> EPA <br /> Percent <br /> Recovery <br /> True Percent Acceptance <br /> Analyle Value ResUll Recovery Cmena <br /> Chloromethane 50 27 54 D-193 <br /> Vinyl Chloride 50 41 82 28-163 <br /> Bromomethane 50 33 66 0-144 <br /> Chloroethane 50 39 78 46-137 <br /> Trichlorofluoromethane (Freon 11) 50 41 82 21-156 <br /> 1,1-Dichloroethene 50 45 90 28-167 <br /> Methylene Chloride 50 33 66 25-162 <br /> trans-1,2-Dichloroethene 50 38 76 38-155 <br /> 1,1-Dichloroethane 50 39 78 47-132 <br /> Chloroform 50 37 74 49-133 <br /> 1,1,1-Trichloroethane (TCA) 50 37 74 41-138 <br /> Carbon Tetrachloride 50 40 80 43-143 <br /> 1,2-D+chloroethane 50 43 86 51-147 <br /> Trichloroethene (TCE) 50 45. 90 35-146 <br /> 1,2-Dichloropropane 50 48 96 44-156 <br /> Bromodichloromethane 50 48 96 42-172 <br /> trans-l,3-Dichloropropene 50 55 110 22-178 <br /> cis-1,3-Dichloropropens 50 47 94 22-178 <br /> 1,1,2-Trichloroethane 50 44 88 39-136 <br /> Tetrachloroethene (PCE) 50 46 92 26-162 <br /> Dibromochloromethane 50 49 98 24-191 <br /> Chlorobenzene 50 46 92 38-150 <br /> Bromoform 50 44 88 13-159 <br /> 1,1,2,2-Tetrachloroethane 50 46 92 8-184 <br /> 1,3-Dichlorobenzene 50 46 92 7-187 <br /> 1,4-Dichlorobenzene 50 50 100 42-143 <br />` 1,2-Dichlorobenzene 50 48 96 D-208 <br /> D Detected <br /> I <br /> • <br /> Approved by: Date <br />