ARCHIVED REPORTS ADDITIONAL SOIL SAMPLING AND ANALYSES

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' h'q KLEINFELDER Ten of the 14 soil samples were additionally analyzed for five LUFT Metals including Cadmium, Chromium, Lead,Nickel and Zinc. ' During Kleinfelder's previous assessment of the site approximately 4,100 yards of soil was stockpiled (June and July 2001). Approximately 1,400 additional yards of soil was excavated and stockpiled during this assessment (August 2001). Between August 14 and 16, 2001 this soil was transported to Forward Landfill located southeast of Stockton, California (See detailed customer summary report provided from Forward Landfill in the Appendix Q. ' 4.1 CONFIRMATION SOIL SAMPLING Approximately 1,000-yards of additional stained soil with a petroleum odor was removed the northern and eastern sidewalls of Excavation LE-C. The excavation was irregular in shape with ' approximate dimensions of 110 feet by 130 feet by 9-feet deep. Soil was removed vertically until groundwater was encountered, about nine feet below ground surface (bgs). A total of eight confirmation soil samples were collected, three from the eastern sidewall and five from the ' extension of the northern sidewall. The soil samples were collected at depths ranging from five to seven feet bgs, where the bulk of the contaminated soil was noted. After excavation activities, no discolored soil or petroleum-like odors were noted along the sidewalls of this excavation. ' Approximately 400 yards of stained soil was removed from southern excavation SE-D. This ' excavation was located on proposed residential Lot 22 south of LE-C. This excavation appears to transect a portion of the western portion of the former UST soil excavation of the former R&B Trucking Company (See Plate 2 for approximate locations). This excavation was irregular in ' shape and measured approximately 45 by 60 by 4 feet deep. A total of six soil samples were collected in this area, four sidewall samples and two bottom samples. After excavation activities, no discolored soil or petroleum-like odors were noted within this excavation. ' Confirmation soil samples were collected by slide hammering a 2-inch diameter by 6-inch long stainless steel tube into the soil. The stainless steel sampler and tubes were cleaned between locations with a LiquinoxO (laboratory-grade detergent) wash followed by a potable water and distilled water rinse. The stainless steel tubes used for collecting the samples were then sealed following collection of the samples with Teflon° sheeting and tight-fitting plastic end caps. After collection, the soil samples were labeled, logged on a chain-of-custody form, and immediately stored in an iced cooler pending transportation to the analytical laboratory. ' The soil samples were transported under chain-of-custody control to Kleinfelder's office and then transported by courier in a chilled container to Alpha Analytical Laboratory, Inc. (Alpha) of Sparks, Nevada. The chain-of-custody form was signed by each individual who handled the ' samples, including the sampler and the receiving employee at Alpha. Alpha is certified by the State of California to perform the analyses requested. The samples were analyzed on a standard 10 working day turnaround schedule for completion. 20.4341-11.EO1/2011L635 Page 3 of 8 Copyright 2001 Kleinfelder,Inc. September 24,2001 1