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Trace A"alysis Laboratory, Inc. <br /> 3423 Investment Boulevard, #8 + Hayward, California 94545 Telephone (415) 783-6960 <br /> Facsimile (415) 783-1512 <br /> ' July 12, 1991 <br />' Mr. James Jensen <br /> Versar, Inc. <br /> 5330 Primrose Drive, Suite 228 <br /> Fair Oaks, CA 95628 <br /> Dear Mr. Jensen. <br /> Trace Analysis Laboratory received one air sample on July 9, 1991 , for <br /> your Project No. 6264.308.02, PB Stockton (our custody Log Number <br /> 1089) . <br />' This sample was analyzed for Total Petroleum Hydrocarbons as Gasoline, <br /> Benzene, Toluene, Xylenes and Ethylbenzene. Our analytical report, <br /> the completed chain of custody form, and our analytical methodologies <br /> 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 /> Louis DuPuis <br /> QA/QC Manager <br />' Enclosures <br /> Founding Member of the Association of California Testing Laboratories <br />