FIELD DOCUMENTS - Laserfiche WebLink

Home Browse Search

,.W FORD NEW HOLLAND PRELIMINARY REPORT STOCKTON, CALIFORNIA .r INTRODUCTION This report describes site conditions and proposed site assessment work to evaluate the extent of soil and groundwater contamination associated with two former underground fuel storage tanks at the Stockton Ford New Holland, Inc. dealership at 2150 West Charter Way in Stockton, California. The report has been prepared in accordance with guidelines set forth in the San Joaquin Local Health District Leaking Underground Storage Tank Investigative Formats and in the Regional Board Staff Recommendations for Initial Evaluation and Investigation of Underground Tanks, June 2, 1988. The location of the project site is shown on Figure 1. New Holland, Inc. is the owner of the former tanks. The on-site contact person is Mr. Charles Iker, General Manager of the dealership. The dealership is located on a 3.46-acre parcel, Assessor's Parcel Number (APN) 163-020-011, near the center of Township 1 North, Range 6 East, MDB&M. No section is indicated for this area on the Stockton West 7.5 minute topographic map (USGS; 1968; photo revised 1976) . BACKGROUND A 1,000-gallon underground diesel storage tank and a 3,000-gallon underground regular gasoline storage tank were closed by removal at the site on November 20, 1987 by Stockton Service Station Equipment Company, Inc. of Stockton, California. Charles Iker has indicated that the tanks were approximately 13 years old. Tank testing performed by Integrity Tank Testing Systems, Inc. (ITTS) on September 25, 1985 showed the tanks and lines certifiable, in accordance with NPFA 329 acceptance guidelines. Tank testing performed by ITTS on November 21, 1986, showed the diesel tank certifiable, in accordance with NPFA 329 criteria. However, difficulties were encountered testing the 3,000-gallon gasoline tank, the test recorder device could not be used and quantifiable results were not obtained. The former locations of the tanks are shown on Figure 2. Piping and pumps associated with the tanks were restricted to the area overlying the tanks. v One soil sample and one water sample were collected from the tank excavation on January 1, 1988 by Trace Analysis Laboratory, Inc. of Hayward, California. The soil sample was collected at a depth of 10 feet and the water sample was collected from standing water at a depth of 11 feet in the excavation. The samples were analyzed by Trace for Total Volatile Hydrocarbons (TVH) and Total Extractable Hydrocarbons (TEH) by Modified EPA Method 8015 and for Total Volatile Aromatic (TVA) compounds by Modified EPA Method 8020. Results of these analyses showed elevated levels of petroleum hydrocarbons, benzene, toluene, and xylenes in the soil and water beneath the former tank sites, as summarized below. C:9/27/88 1