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Trace Analysis Laboratory, Inc. Telephone (510) 783-6960 <br /> 3423 Investment Boulevard, ##8 • Hayward, California 94545 Facsimile (510) 783-1512 <br /> EOG NUMBER: 1773 <br /> DATE SAMPLED: 02/07/92 <br /> DATE RECEIVED: 02/07/92 <br /> DATE ANALYZED: 02/10/92 <br /> DATE REPORTED: 02/24/92 <br /> CUSTOMER: Conoco, Inc. <br /> REQUESTER Joe DeB7aso <br /> PROJECT- No. 400511-M, Conoco, Stockton <br /> Sample_ Type. A i r <br /> Influent Method Blank <br /> Method and Concen- Reporting Concen- Reporting <br /> Constituent: Units tration Limit tration Limit <br /> Modified DHS Method: <br /> Total Petroleum Hydro- <br /> carbons as Gasoline mg/m3 26,000 3,800 ND 7.7 <br /> Wdified EPA Method 8020 for <br /> Benzene mg/m3 NO 48 NO 0 095 <br /> Toluene mg/m3 300 30 NO 0 061 <br /> Ethyl benzene mg/m3 290 37 ND 0.074 <br /> Xylenes mg/m3 2,500 100 ND 0.20 <br /> OC Summary <br /> % Recovery- 80* <br /> RPD: 0.7 <br /> Concentrations reported as ND were not detected at or above the reporting limit. <br /> * The Recovery for air samples is based on the Laboratory Control Sample. <br /> Louis W. DUPuis <br /> Quality Assurance/Quality Control Manager <br /> Founding Member of the Association of California Testing taboratorres A-5 <br />