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COLUMBIA ANALYTICAL SERVICES, INC <br /> QA/QC Report <br /> Client- EMCON Associates Date Received 09102193 <br /> Project: EMCON Project No OG71-038 01 Service Request No SJ93-1 101 <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 /> ug/L (ppb) <br /> Sample Name MW-3 (53) <br /> Date Analyzed. 09/15/93 <br /> Percent Recovery <br /> EPA <br /> Spike Sample Spike Result Acceptance <br /> Analyte Level Result MS DMS MS DMS Criteria <br /> �1,1-Dichloroethene 50 NO 330 3 52 66 70 28-167 <br /> Trichloroethene 50 NO 436 461 87 92 35-146 <br /> Tetrachloroethene 50 NO 3 64 3 80 72 76 26-162 <br /> r� <br /> Approved by �'� 1 �/21rj th DateL� r � <br /> Q?1 Q nnwnn.i 4..Q.,. o • C�.. i r- r, na.16. <br />