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Trace Analysis Laboratory,Inc. <br /> Telephone (510) 783-6960 <br /> 3423 lnvestment Boulevard #8 • Hayward, California 94545 Facsimile (510) 783-1512 <br /> N Nlrl N � <br /> N � <br /> March 19, 1992 <br /> Mr. Joe DeB1aso <br /> DuPont Environmental Remediation Services, Inc. <br /> 7068 Koll Center Parkway, Suite 401 <br /> Pleasanton, California 94566 <br /> Dear Mr. DeB1aso: <br /> Trace Analysis Laboratory received one air sample on March 5, 1992 <br /> for your Conoco Project No. 400511-M, Stockton (our custody log number <br /> 1862) <br /> This sample was analyzed for Total Petroleum Hydrocarbons as Gasoline, <br /> and Benzene, Toluene, Ethylbenzene and Xylenes. Our analytical report <br /> and the completed chain of custody form are enclosed for your review <br /> Trace Analysis Laboratory is certified under the California Environ- <br /> mental Laboratory Accreditation Program. Our certification number is <br /> 1199. <br /> If you should have any questions or require additional information, <br /> please call me <br /> Sincerely yo rs, <br /> �4_� <br /> Jjifer ekol <br /> ett 5pecialist <br /> Enclosures <br /> Founding Member of the Association of California Testing Laboratories <br /> A-7 <br />