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COLUMBIA ANALYTICAL SERVICES. INC. <br /> QA/QC Report <br /> Client: EMCON Associates Date Recenred: 12/18/92 <br /> Project- EMCON Project No. OG71-038 01 Service Request No.: SJ92-1604 <br /> ARCO Facility No 2168 Sample Matrnc: Water <br /> Matrix Spike/Duplicate Matnx Spike Summary <br /> Halogenated Volatile Organic Compounds <br /> EPA Methods 5030/601 <br /> mg/L. (ppb) <br /> Sample Name MW-1 1541 <br /> Date Analyzed: 12/21/92 <br /> Percent Recovery <br /> EPA <br /> . Spike Sample Spike Result Acceptance <br /> AAnidyte L2yAJ Result MS BMJ NIS QMS Criteria <br /> 1,1-Dichloroethene 10 ND 665 793 67 79 28-167 <br /> Tnchloroethene 10 ND 10.4 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 /> Approved drDate: 3Tlf !� <br /> 13 <br />