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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 /> LOG NUMBER• 3294 <br /> DATE SAMPLED. 06/02/93 <br /> DATE RECEIVED• 06/02/93 <br /> DATE ANALYZED. 06/03/93 <br /> DATE REPORTED• 06/16/93 <br /> CUSTOMER Conoco, Inc <br /> REQUESTER: Leonard Long of Sunriver Engineering and Construction, Inc <br /> PROJECT• No 0511-31-5740-04, Stockton <br />' <br /> Sample Type Vapor <br /> Inc Influent Method Blank <br /> Method and Concen- Reporting Concen- Reporting <br /> Constituent Units tration Limit tration Limit <br /> Modified QHS Method- <br /> Total Petroleum Hydro- <br /> carbons as Gasoline mg/m3 1 ,400 10 ND 10 <br /> Modified EPA Method 8020 for. <br /> Benzene mg/m3 ND 1 8 ND 0 10 <br /> Toluene mg/m3 35 1 7 ND 0 10 <br /> Ethylbenzene mg/m3 42 7 4 ND 0 15 <br /> Xylenes mg/m3 440 5.0 ND 0 30 <br />' OC Summar <br /> % Recovery 117* <br />' % RPD 0 12 <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 />' Founding Member of the Association of California Testing Laboratories <br />