WORK PLANS - Laserfiche WebLink

Home Browse Search

i 1 f C) SITE INVESTIGATION WORK PLAN November 1996 New Jerusalem School 31400 South Koster Road Tracy, California 1.0. INTRODUCTION In accordance with the request of New Jerusalem School,Advanced GeoEnvironmental, Inc. (AGE) has prepared this Site Investigation Work Plan for the site located at 31400 South Koster Road in Tracy, California. The scope of work is to determine the lateral and vertical extent of hydrocarbon- impacted soil and ground water near the former underground storage tank(UST)and dispenser areas. The location of the site is illustrated in Figure 1 - Location kMap. A plan of the site is illustrated on Figure 2 - Site Plan. M This Work Plan is prepared in accordance with San Joaquin County Public Health Services - Environmental Health Division (PHS-EHD) and Central Valley Regional Water Quality Control Board (CVRWQCB) guidelines for the investigation of UST sites. 2.0. BACKGROUND a 2.1. SITE LOCATION AND DESCRIPTION The site is located in a flat, commercial area of southern San Joaquin County, California, southeast of the City of Tracy. The property is presently occupied by New Jerusalem School. 2.2. UNDERGROUND STORAGE TANK REMOVAL One 1,000-gallon UST and one 350-gallon UST were removed from the site in July 1989. Total petroleum hydrocarbons quantified as gasoline (TPH-g) and volatile aromatics (benzene, toluene, ethylbenzene and xylenes: BTE&X)were detected in soil samples collected beneath the 350-gallon UST upon removal. Water was present in the UST excavation at the time of removal; however, no samples were collected. l 2.3. GROUND WATER DEPTH AND FLOW DIRECTION Based upon information obtained from the PHS-EHD' ground water depth at the site is approximately eight to twelve feet below surface grade (bsg). Regional ground water flow direction in the area is northeast.