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A_ .�-- � .mss � - �- ,:�_ +�- A �.. ":F _ _ /�• �•- <br /> _ <br /> . :.: WANa <br /> f <br /> Tblephonc f415)7133-G'J60 <br /> {rsra \nalytiiy !raft<,ralnr}'.Irsr Fa,csirnilc(415}163-1512 <br /> 3423 Investment f30u10va,d,rrf3 11nywaul,California 945.15 <br /> April 22, 1991 <br /> .toe De Biaso <br /> DuPont Environmental Remediation Services, Inc, <br /> 7068 Koll Center Parkway, Suite 401 <br /> Pleasanton, CA 94566 <br /> Dear Mr. De Biaso: <br /> Trace Analysis Laboratory received one air sample on April 8, <br /> 1991, for your Conoco Project No. 1088-R-4, Stockton (Our custody <br /> Log Number 9748). <br /> This sample was analyzed for Total Petroleum Hydrocarbons as <br /> Gasoline, Benzene, Toluene, Xylenes and Ethylbenzene. Our ana- <br /> lytical report and the completed chain of custody form are enclosed <br /> for your review. <br /> Trace Analysis Laboratory is certified under the California Environ- <br /> mental Laboratory Accreditation Program. Our certification number <br /> is 1199. <br /> If you should have any questions or require additional information, <br /> please call me. <br /> Sincerely yours, <br /> Gerald H. Nieder-Westermann <br /> Project Specialist <br /> GNW:gnw <br /> Enclosures <br /> Founding Member of the Association at calitatnia Testing Laboratories <br />