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ion ` same PHASE I Hy2ROGEOLOGIC ASSESSMENT_ WORK PLAN 7910 Lower Sacramento Road,Stockton, California Delta Project No. 40-88-147 Pane s 1.. 2.2 Site Set in �. The Shell Service Station is located at 7910 Lower Sacramento Road in Stockton, California, SW 1/4, NE 1/4, Section 16, T.2N., R.6E. (Figure I). The site is located in a commercial area of Stockton and encompasses an area of approximately 0.37 acre. The property is bordered on the south by Hammer Lane, on the west by Lower Sacramento Road, and on the north and northeast by a shopping center. 2.3 Site History Records from the San Joaquin County Assessor's office indicate that the Parcel No. is 077-330-49 and that the land is owned by Y. C. Soda. Shell Oil Company owns the station building, underground storage tanks, and piping. Mr. John Kindrick is the current station operator and has leased the facility from Shell for the last nine years. Due to the age of the steel underground storage tanks, Shell decided to replace the tanks with fiberglass tanks. A precision tank test was performed during the summer of 1987 by Hunter Environmental on the three former underground storage tanks. The results, as discussed with the owner, did not indicate a problem with the tightness of the tanks. On December 20, 1988, three steel underground storage tanks were excavated and removed from the site. A tank closure report detailing tank removal activities was submitted to San Joaquin County in April, 1989. Three new 10,000--gallon double-walIed fiberglass underground storage tanks were installed on December 22, 1988. Existing and former tank sizes, type of product stored, age, and tank construction data are presented in Table 1. 60 2.4 Utilities The site lies within the city of Stockton and is on city water and sewer. Sewer, water, and storm `r lines are located under Lower Sacramento Road. Before drilling is initiated, Underground Service Alert will be contacted to locate all buried utilities. 2.5 Well Inventory 61 An Inventory of existing domestic and municipal water supply wells near the site was initiated on February 22, 1989, by a Delta representative at the California Department of Water Resources (DWR). According to DWR records, 25 wells have been identified within a half-mile radius of the site.