Laserfiche WebLink
2905 W Benjamin Holt Drive, Stockton, California March 24, 1994 <br /> Chevron USA Products Company Page 2 <br /> 2.0 BACKGROUND <br /> The site is an active service station located on the northwest corner of West Benjamin Holt Drive <br /> intersection and Plymouth Road in Stockton, San Joaquin County, California Currently, the service <br /> station operates two pump islands supplied by four underground storage tanks (USTs) containing three <br /> grades of gasoline, a small convenience market and a car wash (Figure 2) The site is located <br /> approximately 0 to 5 feet above sea level and the site topography is flat Local surface drainage is to <br /> the west and controlled by a number sloughs, canals and ditches The site is bordered to the east by <br /> Swenson Park Golf Course, to the west by Interstate 5, to the north by a residential development, and to <br /> the south by an ARCO service station with known soil and groundwater contamination <br /> The Chevron service station was demolished in late 1988 to early 1989 and remodeled into the current <br /> configuration in 1991 In the former arrangement, one 6,000-gallon and two 10,000-gallon fiberglass <br /> USTs storing gasoline rested approximately 12 feet below ground surface (BGS) in a UST pit located <br /> beneath the southwest portion of the site (Figure 2) The former pump islands were located just west of <br /> the tank pit and aligned parallel to West Benjamin Holt Drive A service station building and a 550-gallon <br /> fiberglass used-oil UST were located near the location of the present USTs (Figure 2) The three former <br /> USTs, the used-oil UST, service station building and associated piping were removed in 1989 during <br /> demolition No holes were noticed in the tanks when removed (Blaine Tech Services, Inc , 1989) Initial <br /> soil assessment was started during tank removal as required by the SJCPHS-EHD Subsequent soil and <br /> groundwater assessment since 1989 has included new and former tank-pit soil sampling, product-line <br /> trench soil sampling, soil-vapor surveying, groundwater monitoring and vadose well installation, and <br /> quarterly groundwater monitoring and sampling in an attempt to define the limits of <br /> hydrocarbon-impacted material (Groundwater Technology, Inc , April 1992) The results of environmental <br /> assessment have been summarized in previous reports submitted by Chevron to SJCPHS-EHD <br /> • <br /> GROUNDWATER <br /> 3831SUM airy �� ��i TECHNOLOGY <br />