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• • KLEINEELDER <br /> 4. Old Trucks&Debris: <br /> Observations <br /> • The property is littered with old truck bodies and parts of various kind. Also there is a large <br /> amount of debris and junk scattered around the Property. <br /> Conclusions <br /> • This material probably does not pose a significant threat to soil or groundwater contamination. <br /> Recommendations <br /> • However, due to the change in land use, this material should be removed from the Property and <br /> any soil stained by oil leaking from the trucks and parts should also be removed appropriately. <br /> 5. Former Underground Fuel Storage Tank: <br /> Observations <br /> • R&B Trucking used to operate a diesel fueling island served by six underground storage tanks <br /> located on the southwest portion of the Property. These tanks were removed in March 1989 and <br /> a small amount of soil contamination was found. <br /> • An underground waste oil tank was also removed at that time. It was located behind(west of) <br /> the shop. One of the soil samples under this tank contained trace amounts of diesel. No other <br /> petroleum compound was found. <br /> • The excavation for the diesel tanks was enlarged so that the contaminated soil could be removed. <br /> In late 1989 and early 1990,Geological Technics Inc.installed 3 monitoring wells and tested the <br /> soil and groundwater around the former tanks. <br /> • The soil under tank #5 was found to contain moderate amounts of diesel, while the soil under <br /> tanks 1, 3,4&5 was found to contain trace amounts of BTEX compounds. <br /> • The groundwater samples from the three monitoring wells were found to be clean and not <br /> contaminated with any of the compounds tested for. <br /> • This site was closed by San Joaquin County and no further action was required in June 1990 <br /> after the contaminated soil was removed. <br /> Conclusions <br /> • There is no evidence that these former USTs pose a threat of environmental liability to this <br /> Property. <br /> Recommendations <br /> • No further action is recommended. <br /> Adjoining&Surrounding Properties <br /> Observation <br /> • Within 1/8 mile surrounding the Property there is a large auto/truck fueling plaza with a total of <br /> 8 registered USTs. No violations or releases have been recorded. <br /> • There are no sites with known contamination issues within 1/8 mile surrounding the Property. <br /> 20-YPI-628/2011P180 Page A-4 <br /> 0 2001,Kleinfelder,Inc. July 2,2001 <br />