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' QUARTERLY REPORT <br /> December 1995 <br />' Former CHASE CHEVROLET (Van Buren) Facility <br /> 424 North Van Buren Street <br /> Stockton, California <br />' 1.0. INTRODUCTION <br /> I In accordance with a request from Mr Jeffery Setness of Hartmann & Setness, Adranced <br /> GeoEnvironmental, Inc (AGE) has prepared this Quarterly Report summarizing field activities <br /> performed during the fourth quarter of 1995 at 424 North Van Buren Street in Stockton, California <br /> (Figure 1 -Location Map) <br /> Field activities were performed in accordance with guidelines for investigation of underground <br /> I storage tank (UST) sites established by the Central Valley Regional Water Quality Control Board <br /> (CVRWQCB) and San Joaquin County Public Health Services - Environmental Health Division <br /> (PHS-EHD) <br /> i <br /> 2.0. BACKGROUND <br /> 2 1 SITE DESCRIPTION <br /> IThe site occupies the city block bounded by West Fremont Street, North Van Buren Street, West <br /> Lindsay Street and North Monroe Street Until 1994, the site was used as a facility for Chase <br /> Chevrolet, a car dealership Two buildings and a covered parking area are located at the site (Figure <br /> 2 - Vicinity Map) An automotive painting facility currently occupies the larger building on the <br /> southern third of the property <br /> IOne 1,000-gallon gasoline underground storage tank, Tank No 7, was removed from the area north <br /> of the small building in 1986 Petroleum hydrocarbons were encountered below the UST The PHS- <br /> IEHD required a soil and ground water investigation to assess the hydrocarbon impact at the site <br /> 22 SITE INVESTIGATION <br /> Between 1990 and 1994 four ground water monitoring wells (MW-3, MW-6, MW-7 and MW-9) and <br /> three soil borings (SB3, SB4 and SB5) were drilled and installed on the site to investigate the extent <br /> of hydrocarbon-impacted soil and ground water in the vicinity of the former UST Impacted soil was <br /> detected in samples collected from each boring <br /> Ground water samples have been collected from monitoring wells on the site on 13 occasions <br /> Petroleum hydrocarbons have been detected in ground water samples collected from each monitoring <br />