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COLUMBIA ANALYTICAL SERVICES, INC + PCA% <br /> "A <br /> QA/QC Report <br /> r Client EMCON Associates Date Received 03/12/93 <br /> Project EMCON Project No OG71-038 01 Service Request No SJ93-0368 <br /> ARCO Facility No 2168 Sample Matrix Water <br /> iu <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> Halogenated Volatile Organic Compounds <br /> I <br /> EPA Methods 5030/601 <br /> Erg/L {ppb) <br /> i Sample Name MW-1 1541 <br /> Date Analyzed 03/16/93 <br /> Percent Recovery <br /> 10 EPA <br /> Spike Sample Spike Result Acceptance <br /> Analy,te Level Result MS DMS MS DMS Criteria <br /> 1,1-Dichloroethene 10 ND 108 105 108 105 28-167 <br /> Trichloroethene 10 ND 11 4 11 0 114 110 35-146 <br /> Tetrachloroethene 10 ND 11 3 11 0 113 110 26-162 <br /> ND None Detected at or above the method reporting limit <br /> t <br /> Approved by Date <br />