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COLUMBIA ANALYTICAL SERVICES, INC <br /> QA/QC Report <br /> Client: EMCON Associates Date Received 12/18/92 <br /> Project: EMCON Project No OG71-038 01 Service Request No . SJ92-1604 <br /> ARCO Facility No 2168 Sample Matrix: Water <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> Halogenated Volatile Organic Compounds <br /> EPA Methods 5030/601 <br /> Ng/L (Ppb) <br /> Sample Name MW-1 {541 <br /> Date Analyzed 12%21/92 <br /> Percent Recovery <br /> EPA <br /> Spike Sample Spike Result Acceptance <br /> Analyte Level Result MM DMS DMS Criteria <br /> 1,1-Dichlaroethene 10 ND 665 793 67 79 28-167 <br /> Trichloroethene 10 ND 104 11 1 104 111 35-146 <br /> Tetrachloroethene 10 ND 102 107 102 107 26-162 <br /> i <br /> ND None Detected at or above the method reporting limit <br /> I <br /> Approved by: Date- AlEpwk- <br /> ��� i✓/ „ <br /> I <br /> t � <br />