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Trarc A:rnky-i,%LaboraWry,lac. Telephone(415)783-6960 <br /> 3423 Fnvcslnscni 110nle4arfl,lift • llayward,California 94545 Facsimilo(415)707-1512 <br /> May 24, 1991 <br /> Joe DeBiaso <br /> Dupont Environmental Remediation Services, Inc. <br /> 7068 Koll Center Parkway, Suite 401 <br /> Pleasanton, CA 94566 <br /> I <br /> Dear Mr. DeBiaso: <br /> Trace Analysis Laboratory received one air sample on May 10, 1991, <br /> for your Conoco Project No. 1088 R-4, Stockton (O(jr custody Log <br /> Number 9854). <br /> This sample was analyzed for Total Petroleum Hydrocarbons as Gasoline, f <br /> Benzene, Toluene, Xylenes and Ethylbenzene. 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 yours, <br /> /a <br /> Louis DuPuis <br /> QA/QC Manager <br /> Enclosures <br /> 4 <br /> Founding Mombor of the Association of cafifornia Tosfing taboraforfos <br /> i <br />