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Trace Ainaiysis Laboratory, line. <br /> Telephone (510) 783-6960 <br /> 3423 Investment Boulevard #8 • Hayward California 94545 Facsimile (510) 783 1512 <br /> January 27, 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. DeBiaso: <br /> Trace Analysis Laboratory received one air samples on January 13, <br /> 1992 for your Conoco Project No. 400511-M, Stockton (our custody log <br /> number 1658) <br /> This sample was analyzed for Total Petroleum Hydrocarbons as Gasoline, <br /> Benzene, Toluene, Ethylbenzene and Xylenes Our analytical report and <br /> 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 your <br /> ttk <br /> Je nifer kol <br /> Project Specialist <br /> Enclosures <br /> Founding Member of the Association of Gahfornia Testing Laboratories 161-1 <br />