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r 3164 Gold Camp Drive D �� Suite 2o0 �/. Delta Rancho Cordova CA 95670 Environmental 9161838-2085 Consultants,Inc FAX 9161638-8385 May 21, 1996 Mr Kenneth Earnest Ultramar Inc 525 West Third Street Hanford, California 93230 i Subject Soil Borings Results Report Fortner Beacon Station No 695 900 South Cherokee Lane Lodi, California Delta Project No D093-915 i Dear Mr Earnest Delta Environmental Consultants, Inc (Delta), was authorized by Ultramar Inc (Ultramar) to assess the progress of the soil remediation by vapor extraction at Former Beacon Station No 695, located at 900 South Cherokee Lane, Lodi, San Joaquin County, California The assessment consisted of drilling six soil borings This report describes the work performed and presents the results of soil sample analyses The location of the site is shown in Figure 1, and site features are illustrated in Figure 2 All work was performed according to the field methods and procedures in Enclosure A Site Background Information The site has been operated as a gasoline service station since the early 1940's Ultramar purchased the property in 1989 and began operating the site as a Beacon gasoline service station Investigations of petroleum hydrocarbons in soil and ground water at the site began in 1985 A total of 27 ground water monitoring wells, recovery wells, and/or soil vapor extraction wells had been installed at the site prior to the current investigation There were four underground fuel storage tanks in use while the site was operated as a Beacon station by Ultramar The tanks were used to store regular unleaded, unleaded plus, supreme unleaded gasoline, and diesel fuel During removal of the four tanks in January 1994 additional product distribution pipes and eleven additional underground storage tanks were discovered These tanks were apparently used by previous owners of the site and their existence was unknown to Ultramar The fifteen tanks at the site were removed in January 1994 Removal of the underground tanks is described in a Delta report entitled Underground Storage Tank Removal and Soil Sampling, dated March 18, 1994 Further research into the history of the site has been presented in a Delta report entitled Review of Historic Aerial Photographs and Maps, dated March 22, 1994 Additional ground water monitoring wells and soil vapor extraction wells were installed by Delta during replacement of the underground tanks and distribution piping in February-March 1994, results are included in Delta's report entitled, Well Installation Report, dated May 10, 1994 Ultramar sold the property in February 1994, the new owners have re-opened the site as a Texaco station Providing a Competitive Edge