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' k4 KLEINFELDER <br /> 2 BACKGROUND <br /> A former gasoline service station (Disco site) was located on the southern portion of the Del <br /> Monte property, west of the former carwash facility. The site was operated as a service station <br /> until the property was purchased by Del Monte in 1976. Del Monte never operated the service <br /> station. The service station was demolished in the late 1980's or early 1990's. <br /> Three 10,000 gallon underground storage tanks (USTs) were identified on the Disco site. The <br /> USTs were removed in 1985. During the removal of the USTs impacts to soil beneath the tanks <br /> was noted. The soil was excavated and aerated on the site and backfilled into the excavation. In <br /> 1991, a soil and groundwater investigation began. That investigation included a soil gas survey, <br /> seven soil borings, and installation of eight monitoring wells. The results showed concentrations <br /> of Total Petroleum Hydrocarbon as gasoline (TPH-g) in the soil at depths ranging from 55 feet <br /> below the ground surface (bgs) to 75 feet bgs, and also in the groundwater. The main <br /> contaminants are TPH-g, benzene, toluene, ethylbenzene, xylene, and 1,2-DCA. The site is <br /> currently being monitored on a quarterly basis. <br /> During a recent Kleinfelder Phase I Environmental Site Assessment, a car wash facility <br /> associated with the former service station was noted on a Del Monte Site Plan dated November <br /> 1976 and a Caltrans Parcel Map dated March 1989. A boiler room was depicted on the 1976 site <br /> plan, and it is unknown if there were any USTs associated with the facility. A geophysical <br /> investigation is underway to investigate the potential for USTs. <br /> Currently, two monitoring wells (MW-3 and MW-9) installed to monitor groundwater associated <br /> with the Disco site are located upgradient and downgradient of the former car wash facility. <br /> Analytical data collected from those wells suggest that petroleum hydrocarbons are not present in <br /> the groundwater at those points. <br /> The purpose of the proposed work is to address potential environmental concerns related to the <br /> former car wash on the Disco Site. As stated earlier, Kleinfelder and Del Monte Foods will be <br /> requesting comments from EHD following this proposed investigation. <br /> 12255.CW1 /ST02R980 Page 2 of 11 <br /> Copyright 2002,Kleinfelder,Inc. December 18,2002 <br />