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COLUMBIA ANALYTICAL SERVICES, INC <br /> QA/QC Report _ <br /> Client EMCON Associates <br /> Project- DateEMCON Protect No OG71-03$ 01 Received 06/11/93 <br /> ARCO Facility No OG71 Service Request No. SJ93-0776 <br /> Sample Matrix Water <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> Halogenated Volatile Organic Compounds <br /> EPA Methods 5030/601 <br /> lag/L (ppb) <br /> Sample Name MWMW 54� <br /> Date Analyzed 06/14/93 <br /> Percent Recovery <br /> Spike Sample Spike Result EPA <br /> Analyte ce <br /> Level Result MS DMS MS DMS ACeperia <br /> *1,1-Dichloroethene 5 0 ND 4 62 4 56 92 91 28-167 <br /> Trichloroethene 50 ND 4 61 480 92 96 35-146 <br /> Tetra chloroethene 5 0 ND 4 73 465 95 93 26-162 <br /> '01 <br /> Approved by Date �Z4 f _` <br /> 15 <br />