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Ian KLEINFELDER 1 ` October 26, 987 Elle: 24--2058-3 ' Mr. Timothy Crandall, Project Engineer California Regional Water Quality Control Board Central Valley Region 3443 Routier Road Sacramento, CA 95827-3098 SUBJECT: Soil Transporatioa and Aeration At&T Microwave Station Lodi, California ' Dear Mr. Crandall. I am writing in reference to your letter of October 6, 1987 and our October 19, 1987 telephone conversation concerning the disposal cf petroleum contaminated soil from the AT&T Microwave Station in Lodi, California. Approximately 325 yards of contaminated soil has been removed from the site and transported to Forward Landfill in Stockton, California. This ,represents the soil with a total petroleum hydrocarbon. (TPH) concentration well below 1,000 mg/kg. The 75 to 100 yards of soil with a previously reported TPH concentration above 1,000 mg/kg remained at ' the AT&T facility. On October 14, 1987, after 325 cubic yards of soil was transported to the ' landfill, the soil remaining on the site was transferred and contained in new plastic sheeting to prevent uncontrolled aeration or contact with the ground surface. As a result of this procedure, mixing of the contaminated ' soil occurred. On October 16, 1987, five brass tube soil samples were collected from the pile of remaining soil. A plan view showing the sample locations has been provided in Attachment A. All of the brass tubes were collected approximately 3 feet above the ground surface by digging about 6 to 12 ' inches into the side of the soil pile. The soil samples were then transported under chain-of-custody to Chemwest Analytical Laboratories, Inc. , in Sacramento, California, where they were ' composited into one sample and analyzed for TPH by GC-FID. ' KLEINFELOER 9795 Business Park Onve, Suite C Sacramento CA 95827 (916) 366-1701