Laserfiche WebLink
w• <br /> 3: <br /> 1.0 INTRODUCTION <br /> wa <br /> 1 .1 Site Location/Regulatory History <br /> i <br /> The subject site is located at 26200 Nowell Road in Thornton <br /> i = (Figure 1). The property is presently <br /> Occupied b <br /> Valley Growers, Plant T, a t°mato canning operat an, y Tri <br /> The Tri Valley Growers, Plant T site has been under <br /> investigation since 1987, when one 50,000 <br /> Oil, one 250 gallon gasoline two 550 gallon #6 fuel <br /> 5,000 and one 10 000 gallon gasoline, one <br /> k3 removed. Soil contamination o were the el tanks <br /> former <br /> tank pits adjacent to the fork-lift shop (Figure 2) , <br /> �- Groundwater contamination was also detected <br /> 5,000 and 10,000 in the former <br /> gallon gasoline/diesel tank pit. <br /> contamination was not detected at the 50, Soil <br /> 000 gallon #6 fuel <br /> f. oil and 250 gallon gasoline tank pits. <br /> Under the direction of the San Joaquin Public Health <br /> Services, formerly the San Joaquin Local Health District, <br /> three phases of site investigation, a monitoring/sampling <br /> program and tank pit excavation has been performed between <br /> 1987 and 1990. <br /> 1.2 Previous Work <br /> The characterization of soils and groundwater at the site <br /> was summarized in two reports by Exeltech Inc. and one by <br /> WaterWork Corporation, These reports have been <br /> previousl <br /> submitted to both the County Health Department and Regional <br /> Water Quality Control Board. <br /> The site stratigraphy consists of clay and clayey silt to <br /> approximately 9 feet, silty sand to 11 feet and sandy <br /> gravely clay to 25 feet. <br /> The investigations showed that soil contamination above the <br /> water table was confined to the area immediately surrounding <br /> the two former tank pits adjacent to the fork lift shop. <br /> Soil contamination was not reported in any of the 6 borings <br /> drilled on-site (Table 1). <br /> The soils that were removed durirq tank excavation were <br /> allowed to aerate and then were sampled to ensure the soils <br /> were clean (Exceltech 03/24/88). The former 5,000 and <br /> 10,000 gallon gasoline/diesel tank <br /> Pit ways resampled to <br /> eneure that all residual contamination had been removed <br /> (Figure ._3)......(waterwork --05/15/89). --.._._. -- <br /> ---The two tank <br /> Alts were <br /> backfilled with the aerated iDecember <br /> ---- 1989. <br /> sol and clean fill in <br /> l <br />