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Trace Analysis Laboratory, Inc <br /> Telephone (510) 783-6960 <br /> 3423 Investment Boulevard #8 • Hayward California 94545 Facsimile (510) 783-1512 <br /> LOG NUMBER 4715 <br /> .. � DATE SAMPLED: 08/29/94 <br /> DATE RECEIVED• 08/31/94 <br /> DATE ANALYZED: 09/02/94 <br />' DATE REPORTED 09/07/94 <br /> CUSTOMER Conoco, Inc <br /> REQUESTER Lenard Long of Sunriver Engineering and Construction, Inc <br />' PROJECT No 93036, Stockton, 4325 East Washington Avenue, Stockton, CA <br /> Samol a Type Vapor <br /> I-1 Method Blank <br /> Method and Concen- Reporting Concen- Reporting <br />' Constituent Units tration Limit _ tration w limit <br /> Modified DNS Method. <br />' Total Petroleum Hydro <br /> carbons as Gasoline trig/in3 2, 100 120 ND 10 <br /> Wodified EPA Method 8020 for. <br /> benzene mg/m3 ND 2 5 ND 0 10 <br /> Toluene mq/m3 12 2 5 ND 0 10 <br />' Ethyl benzene mg/m3 28 2 5 ND 0 10 <br /> Xylenes mg/m3 280 7 5 ND 0 30 <br /> 1 <br /> QC Summary <br />' % Recovery 107* <br /> q RPC 7 1 <br />' Concentrations reported as ND were not detected at or above the reporting limit <br /> * The Recovery for vapor samples is based on the Laboratory Control Sample <br /> Louis W Dupuis <br /> Quality Assurance/Quality Control Manager <br /> 1 <br />' Founding Member of the Association of California Testing Laboratories <br />