ARCHIVED REPORTS_XR0002485 - Laserfiche WebLink

Home Browse Search

tLEARWATER, --ALM J • G R O U P, I N C Environmental Servzces-" PI", 12- 53 Ms Lon Duncan September 30, 1999 San Joaquin County Public Health Services/Environmental Health Division 304 East Weber Avenue,Third Floor Stockton,CA 95202 Re Workplan for Addehonal Subsurface Inveshgalion Barnes Trucking Facility, 1817 South Fresno Ave., Stockton, CA This workplan, submitted by Clearwater Group, Inc (Clearwater) on behalf of Mr Floyd Barnes of Barnes Trucking, proposes additional subsurface investigation at the referenced property(Figure 1)for the purposes of contaminant plume delineation This workplan is submitted in response to San Joaquin County Public Health Services Environmental Health Division's (SJCPHS/EHD's) request of June 25, 1999 Additionally, this workplan proposes rehabilitation of damaged well MW-5 Background Site Description • The Barnes Trucking Facility is located adjacent to the southwest corner of the intersection of Charter Way (State Highway 4) and South Fresno Avenue (Figure 1) The property is located approximately 15 miles south of the Port of Stockton Turning Basin and 0 9 mile east of the San Joaquin River (Figure 2) Currently, the site is used as a truck dispatch center and parking area There are no fuel dispensing facilities operating at the site Previous Work On June 15, 1992, two underground storage tanks (USTs) were removed from the site according to an April 30, 1996 letter by Ms Mary Meays of the SJCPHS/EHD At the time of removal, both 10,000-gallon capacity USTs had been used to store diesel fuel According to the SJCPHS/EHD, four soil samples were collected from the bottom of the excavation at a depth of approximately 16 feet below ground surface (bgs) Soil samples were analyzed for total petroleum hydrocarbons as gasoline (TPHg) as diesel fuel (TPHd), as kerosene (TPHk), and as oil (TPHo) Samples were also analyzed for benzene, toluene, ethylbenzene, and xylenes (BTEX) The highest concentrations of TPHg, TPHd, and BTEX were detected at 5,700 mg/kg(TPHg),50 mg/kg(TPHd),and 48 mg/kg(benzene) TPHk and TPHo were not detected in any of the four samples above the laboratory reporting limit In September 1997, Clearwater supervised the drilling of six exploratory soil borings (SB-1 through SB-6) to depths between 31 and 36 feet bgs in the vicinity of the former USTs (Figure 2) Low to moderate concentrations of gasoline range hydrocarbons were detected in soil samples collected from all soil bonngs except S13-3 and S13-4 Three of the soil borings were converted to groundwater monitoring wells(MW-1,MW-2, and MW-3) Water samples from wells MW-1 and MW-3 contained elevated concentrations of gasoline range hydrocarbons, however,gasoline compounds in the water 520 Third Street,Swte 104 o Oakland,Califorrua 94607 0 Telephone 510-893-5160 o Fax 510-893-5947