Laserfiche WebLink
Metadata
Document management portal powered by Laserfiche WebLink 9 © 1998-2015 Laserfiche. All rights reserved.
SITE INVESTIGATION <br /> 1014 N. El Dorado Street <br /> Stockton, California <br /> INTRODUCTION <br /> Prior to the sale of the referenced property, Budget Rent-A-Car <br /> retained Geological Audit Services to determine whether previous <br /> operation of underground storage tanks (UST's) at the facility had <br /> contaminated soil or groundwater at the site. Geological Audit <br /> Services recommended the drilling of several shallow borings in the <br /> area of the former UST' s and dispenser islands and the collection <br /> of samples for laboratory analysis. A work plan was submitted to <br /> the San Joaquin County Environmental Health Department on 13 March <br /> 1992 and approved on 19 March 1992 . The buyers of the property have <br /> asked the present owners to obtain official site closure prior to <br /> the sale, if possible. <br /> SITE DESCRIPTION <br /> The site is located in a flat light industrial/commercial area of <br /> central Stockton (Figure 1 - Location Map, 7 . 5 Minute Stockton West <br /> Quadrangle, USGS Topographic Map Series, 1987) . Formerly, the site <br /> was a gasoline service station, and the former station building and <br /> dispenser island canopies are still present on the property. The <br /> underground storage tank facility apparently consisted of five fuel <br /> tanks, one waste oil tank, three fueling islands and their <br /> associated piping. According to existing records, all tanks, piping <br /> and dispensers have been removed from the site. The property is <br /> currently unoccupied. <br /> The site is underlain by unconsolidated Quaternary alluvial <br /> sediment. The upper twenty feet consists of clayey sands to silty <br /> sands. First groundwater is estimated at 45-55 feet below surface <br /> grade (San Joaquin County Department of Public Works, Flood Control <br /> Section, 1990) . <br /> PREVIOUS WORK <br /> According to records at the San Joaquin County - Environmental <br /> Health Division (SJEHD) , three to five underground tanks were <br /> removed from the property by an unknown contractor in 1984 (see <br /> Figure 2 - Site Plan) . The records do not indicate whether soil <br /> samples were collected or analyzed. The excavation was apparently <br /> backfilled and covered with asphalt. <br /> In February 1988, under the direction of BSK & Associates, one soil <br /> boring was drilled to a depth of 26. 5 feet in the southeast portion <br /> of the property, where the fuel tanks were located. Six samples <br /> were collected from the boring and analyzed for total petroleum <br />