Laserfiche WebLink
r <br /> i <br /> 1.0 Introduction J <br /> IT Corporation (M was retained to perform groundwater monitoring at the Van den Bergh <br /> 1 Foods Company facility (Site Code 2207.3), located in Stockton, California (Figure 1). <br /> } <br /> 1.1 Facility Background <br /> The Van den Bergh Foods Company facility is located at 1400 Waterloo Road, Stockton, <br /> { California. The facility has been used for commercial food processing for over 30 years, and is <br /> f located on the flat terrain of California's Central Valley. The soils underlying the facility consist <br /> largely of silts and clays with interbeds of sands. A <br /> five to ten foot flock sand unit is <br /> encountered at a depth of approximately 45 feet. In August 1996, groundwater at the site was <br /> encountered at average depths of 59.84 and 60.50 feet in shallow and deeps wells,respectively. <br /> The site groundwater has historically been calculated to flow in different directions at a low <br /> { <br /> --- gradient. <br /> y 1.2 Site History <br /> it On May 26, 1984, a 1000-gallon gasoline tank, a 550-gal Ion Stoddard solvent(petroleum) tank, <br /> and a 550-gallon diesel tank were removed from a common excavation by American <br /> .1' <br /> - Environmental Management Corporation: Analytical results of native soil samples collected <br /> from the bottom of the tank pit yielded concentrations of total petroleum hydrocarbons (TPH) as <br /> E diesel and chlorinated organic g compounds. The tank excavation was subsequently backfilled. <br /> i <br /> Subsequent investigative and corrective actions implemented at the site have included: <br /> ,0 Drilling of three soil borings to 30 feet (R-1,R-2, and R-3) by Stauffer in 1987. <br /> • Installation of three monitoring wells (MW-1 to 63 feet, MW-2 to 64.5 feet, and <br /> MW-3 to 65 feet) by Roy F." eston, Inc': in October 1988. <br /> • Drilling of one soil boring (B-1 to 81.5 feet) and one monitoring well (MW-4 to 95 <br /> ( feet) by a Remediation Services, Inc. (RSI) subsidiary, BSK&Associates (BSK), <br /> L in October 1992. <br /> • Drilling of four soil borings (B-101 to 75 feet, B-102 to 75 feet, B-103 to 75.5 feet, <br /> and B-104 to 75 feet) by BSK in February 1993. <br /> • Installation of two monitoring wells (MW-5 to 90 feet ,and MW-6 to 89 feet) by <br /> BSK in December 1993. <br /> k <br /> NIZW-19-96NbBF/96-0019.}s 1-1 <br />