WORK PLANS - Laserfiche WebLink

Home Browse Search

JIB ¢ A I I� (MW Exxon Service Station 3128 W. Ben Holt Dr., Stockton California EXECUTIVE SUMMARY ! The project site, which is the fo er Exxon service station at 3128 West Benjamin Holt Drive, is located 1 northwest: Stockton, California, at the southeast corner of Grigsby Place.'and West Benjami*Holt Drive, approximately 200 feet west of Interstate 5. The site is surrounded by a mixture of commercial and residential properties. The site ; is bounded by a shopping center and a Shell gasoline station to the north,:} a church and residential area to the west, a water tower, Seven Eleven parking lot and store and residential area to the south and Interstate Highway 5 to the east. The site was an active Exxon Retail Service Station from 1968 to 1991. Three single-walled steel underground storage tanks previously containing gasoline and having a capacity of 6,000 gallons, 8,000 gallons and 10, 000 gallons are located in the northeast corner of the site. A 1,;1000 gallon waste oil tank is located in the southern portion of thii site, south of the station house/garage. All underground storage tanks on the property are original. As a part of the process of returning the lease to the owner, the service station building was demolished September 30, 1991: The underground storage , tanks, pumps and product pipelines were removed on October 9, 1991. Eleven soil borings were drilled in 1991. Of these, six were converted into monitoring wells. These wells were installed.' andlsampled according to the regulatory guidelines and protocol. The wellsjare part of the active sampling system to monitor the quality of theilgroundwater beneath the site. �k Laboratory analyses of soil and groundwater samples collected from this site indicate gasoline or its constituents have been detected both in soil and groundwater primarily in the immediate vicinity of the pump island and the underground storage tanks. , The corrective action to clean-up the site will include the over-excavation and removal of soils containing gasoline using a backhoe, or similar earth- moving equipment. Approximately 800 cubic yards') of soil may have to be removed from the site. These soils will be lying on and covered by visqueen to prevent run-off or aeration while waitin91 .1 for the analytical results. After all the environmental documentation and proper analyses have been performed, the excavated soils will then be removed from the site and transported to the proper landfill using proper'' procedures and licensed transporters. !� The excavation created during tank removal actiivit?ies and the soil clean-up action will be filled with clean engineered fill material. The monitor wells will remain on site and will continue to be actively monitored according to regulatory guidelines. Issues related to groundwater clean-up will be evaluated after the soil clean-up will be evaluated after the soil clean-up has occurred. I