ARCHIVED REPORTS XR0000104 - Laserfiche WebLink

Home Browse Search

r� Additional Assessment Report 2 Chevron USA Products Company 2405 Airport Way Stockton, California September 23, 1994 20 BACKGROUND The site is currently a vacant lot located on the southwest corner of the 10th Street and Airport Way intersection in Stockton, California The service station building was constructed in 1956 During construction, one 4,000-gallon and one 6,000-gallon gasoline underground storage tanks (USTs), and one 550-gallon used oil UST were installed All USTs were replaced in 1964 with the following one 7,500-gallon, two 5,000-gallon, and one 550-gallon gasoline USTs All USTs were removed in 1977 according to Stockton Fire Department records (Versar, 1989) In 1989, Versar performed an environmental assessment at the site which Included the drilling of three soil borings, and installation of groundwater monitoring well MW-1 in one of the borings (Figure 2) Total petroleum hydrocarbons-as-gasoline (fPH-G) concentrations were detected in only one analyzed soil sample, at 0 35 parts per million (ppm) (Versar, 1989) Groundwater Technology was contracted by Chevron U S A Products Company (Chevron) in February, 1991 to conduct additional site assessment which involved the installation of three groundwater monitoring wells (MW-2 through MW-4) to define the extent of hydrocarbon Impacted and groundwater beneath the site In addition to the field work, a survey of historical land use near the site was performed Petroleum hydrocarbons were not detected in any soil samples collected during the 1991 assessment Additional information regarding the history of this site is detailed in Groundwater Technology's, Site Assessment Report, dated February 22, 1991 The site is currently on a quarterly groundwater monitoring and sampling program The well installed during this assessment was added to the program schedule for the existing wells 50385UM RPT L4 GROUNDWATER TECHNOLOGY