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1 <br /> Trace Analysis Laboratory, Inc <br /> Telephone (510) 783-6960 <br /> 3423 Investment Boulevard #8 • Hayward California 94545 Facsimile {510) 783-1512 <br />' <br /> 0=_ __ = LOG NUMBER 4606 <br /> _ DATE SAMPLED 07/18/94 <br /> DATE RECEIVED 07/19/94 <br /> DATE ANALYZED: 07/20/94 <br /> DATE REPORTED: 08/01/94 <br /> 1 <br /> CUSTOMER: Conoco, Inc. <br />' REQUESTER: Lenard Long of Sunrtver Engineering and Construction, Inc. <br />' PROJECT- No 93036, Stockton, 4325 East Washington Avenue, Stockton, CA <br /> Sample Type- Vapor <br /> I-1 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 1,700 410 ND 10 <br /> Modified EPA Method 8020 for. <br /> Benzene mg/m3 1 9 0 74 ND 0 10 <br /> Toluene mg/m3 17 0.83 ND 0 10 <br />' Ethylbenzene mg/m3 63 1 9 ND 0 10 <br /> Xylenes mg/m3 670 3 7 ND 0.30 <br />' C Summar <br />' % Recovery 92* <br /> RPD. 15 <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 />