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OLUMBIA ANALYTICAL SERVICES, INC <br />Client: EMCON Associates Date Received: 02/14/92 <br />Project: Corral Hollow/939-03.16 Work Order #: SJ92-0159 <br />Sample Matrix: Water <br />QA/QC Report <br />Surrogate Recovery Summary <br />Volatile Organic Compounds <br />EPA Method 8240 <br />P e r c e n t R e c o v e r y <br />1,2-Dichloroethane - D, Toluene - D, 4-Bromofluorobenzene <br />Sample Name Date Analyzed <br />MW -5 02/18/92 101. 105. 102. <br />Method Blank 02/18/92 100. 105. 100. <br />EPA Acceptance Criteria 76-114 88-110 86-115 <br />�tf, Approved by `'�{Date IbI <br />4 <br />1921 Ringwood Avenue • Son Jose, California 95131 0 Telephone 408/437-2400 9 Fox 408/437-9356 <br />