SITE INFORMATION AND CORRESPONDENCE

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r PUBLIC NOTICE Fact Sheet Case Closure for Leaking Underground Storage Tank(UST) Site Ultramar Inc., on behalf of the San Joaquin County Environmental Health Department(SJCEHD), invites public comment regarding the intent of the SJCEHD to grant regulatory closure for the leaking underground storage tank (LUST) case at the below subject site (Site). SUBJECT SITE: Site Name: Abdelwahed Facility GeoTracker Global ID#T0607799505 Site Address: 2255 South Airport Way, Stockton, San Joaquin County, California SJCEHD Site Code: 1335 PUBLIC COMMENT PERIOD: 22 August—22 October 2013 CASE SUMMARY: SJCEHD and the Central Valley Regional Water Quality Control Board (RWQCB), in cooperation with the property owners Sayed and Zakia Abdelwahed, and the responsible party Ultramar Inc. and their environmental consultants have evaluated soil and groundwater conditions, and health concerns at the subject Site resulting from historical unauthorized releases of gasoline from UST systems formerly utilized for fueling operations when the Site was operated as a gasoline station from approximately 1964 to 1982. It is thought that UST systems were removed from the Site circa 1982, but records of the UST removals could not be located during the course of the investigation. Soil and groundwater investigations were conducted from 2002 to 2012. Gasoline hydrocarbons were detected in on-Site soil and groundwater, and off-site groundwater. Soil and groundwater remediation was conducted from October 2007 to May 2012 removing an estimated 40,300 pounds of gasoline hydrocarbons from Site soil and groundwater, thereby reducing contaminant mass and concentrations in soil and groundwater. The residual plume of impacted groundwater extends approximately 250 feet eastward of the subject Site and lies approximately 31 Feet below the ground surface. In 2012, a soil vapor investigation was conducted to evaluate the potential for indoor vapor intrusion into current and future Site buildings. On the basis of previous investigations, groundwater monitoring and remedial actions, the SJCEHD concluded that the Site has been remediated to a level that is protective of the environment and protective of human health for current and future Site use and for adjacent off-site areas, and that natural processes will continue to degrade the petroleum hydrocarbon contaminants. The SJCEHD submitted a Closure Summary to the RWQCB in May 2013. The RWQCB concurred with the SJCEHD closure recommendation in June 2013. After receipt of notification that all case closure activities are completed, the SJCEHD intends to issue a No Further Action Required letter for the subject Site. WHERE TO GET MORE INFORMATION Site information can be obtained from the GeoTracker web site at: http://geotracker.waterboards.ca.gov/. Upon written request, the Site case file is available for review at the SJCEHD office located at 1868 East Hazelton Avenue, Stockton, California 95205. An SJCEHD file review request form can be obtained from the SJCEHD website at http://www.sjcehd.com/docs/Public%20Records%2oRelease%2OApp.pdf. HOW TO PARTICIPATE Interested individuals have the opportunity to learn more about this case and voice concerns regarding its pending closure by submitting comments to Mr. Harlin Knoll of the SJCEHD by October 22, 2013, Mr. Knoll can be reached at(209)468-3442, via e-mail at HKnoll@sjcehd.com, or in writing at 1868 East Hazelton Avenue, Stockton, California 95205.