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Trait a Analysis Laboratory, tric. <br /> Y Ys <br /> Telephore (5 19) 783-6960 <br /> 3423 In restment Boulevard #8 • Hayward California 94545 t-acsimile (5 10) 783-1512 <br /> LOG NUMBER 2944 <br /> __ - DAIE SAMPLED 02/10/93 <br /> DATE RECEIVED: 02/12/93 <br /> DATE ANALYZED: 02/17/93 <br /> DATE REPORTED. 03/01/93 <br /> CUSTOMER: Conoco, Inc <br /> REQUESTER Michael Cadreau of DuPont Environmental Remediation Services, Inc <br /> PROJECT No. 0511-31-5740-04, Stockton ' <br /> Saml2le_Type Water <br /> 1-1 Method Blank ' <br /> Method and Concen-- Reporting Concen- Reporting <br /> Constituent Units tration Limit _ tration _l'mit , <br /> DHS Method <br /> Total Petroleum Hydro- <br /> carbons as Gasoline ug/1 13,000 50 NO 50 <br /> Modified EPA Method 8020 for- <br /> Benzene ug/'] NO 11 ND 0.50 <br /> Toluene ug/1 180 13 NO 0.50 <br /> Ethylbenzene ug/1 85 12 NO 0 50 <br /> Xylenes ug/1 1,300 30 NO 1 5 <br /> C Summar ' <br /> Y <br /> Recovery 86 ' <br /> % RPD- 11 <br /> Concentrations reported as ND were not detected at or above the reporting limit. ' <br /> Louis W DuPu1S , <br /> Quality Assurance/Quality Control Manager <br /> i <br /> 1-oundrng Member of the Association or California Testing L4boratorrEs A � , <br />