SITE INFORMATION AND CORRESPONDENCE CASE 2

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GEOTHASE ENVIRONMENTAL Public Notice Fact Sheet Case Closure for Leaking Underground Storage Tank(UST)Site Geo-Phase Environmental 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)cases at the below subject site(Site). SUBJECT SITE: Site Name: Cutter Lumber Products-Western Lift(Cases 1 &2) Site Address:3930(aka 3430)S.El Dorado Street, Stockton, San Joaquin County,California GeoTracker Global ID#s:T10000004185&T0607700498 PUBLIC COMMENT PERIOD: 1 September- 1 November 2013. CASE SUMMARY: SJCEHD and the Central Valley Regional Water Control Board(RWQCB),-in cooperation with the owner,Cutter Lumber Products,and the responsible party,Bank of Stockton,and their environmental consultants have evaluated soil and groundwater conditions, and health concerns at the subject Site resulting from two historical unauthorized releases of gasoline from UST systems formerly used for fueling operations when the site was operated as a lumber yard. The Case 1 release was discovered in 1991 when former tanks were removed and the Case 2 release was detected in 1996 when a water well was found contaminated with gasoline from an unknown source. Shortly thereafter the exact location of a previously unknown tank was identified and soil borings confirmed it had been removed and had been the source of the gasoline release. The soil and groundwater investigations of the Case 1 release occurred from 1991 to 2009. Gasoline-impacted soil was excavated and removed,and the groundwater was investigated. The impacted groundwater was confined to the site,and natural processes reduced the residual groundwater contamination to the point where it was no longer detectable. The Case 2 release was discovered in 1996 when a previously unknown UST was identified. The investigations of the Case 2 release were conducted from 1996 to 2012. Soil and groundwater remediation was conducted.from 2005 to 2012 and about 1/3 to 1/2 of the estimated 11,000 pounds of gasoline was removed from the soil and about 99 percent of the gasoline dissolved in the groundwater was removed. The residual plume of impacted groundwater extends from the groundwater surface at about 25 feet to a maximum depth of about 45 feet. Groundwater monitoring wells demonstrate the plume extends a short distance under a public roadway near the point of release,but has not affected any other sites. A health risk assessment completed in 2012 found that a limited potential for indoor air intrusion of volatile vapors exists for the subject Site,but not for adjacent sites. On the basis of previous investigations,groundwater monitoring,and remedial actions,the SJCEHD concluded the Site has been remediated to a level that is protective of the environment and of human health for current and future Site use and for adjacent off-site areas,and that natural processes will continue to degrade the residual petroleum hydrocarbon contamination. The SJCEHD submitted a Closure Summary to the RWQCB in July 2013. The RWQCB concurred with the SJCEHD closure recommendation later in the same month. After the 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: General information regarding the site can be obtained from the GeoTracker website. The URL is http://geotracker.waterboards.ca.gov/. The case file for the subject Site may be requested for review at the SJCEHD office at 1868 E. Hazelton Avenue, Stockton,CA. HOW TO PARTICIPATE: Interested individuals may learn more about this case and voice concerns regarding its pending closure by submitting comments to Mr.Harlin Knoll of the SJCEHD by November 1,2013. Mr.Knoll can be reached at(209)468-3442,via e-mail at HKnoll@sjcehd.com, or in writing at 1868 E.Hazelton, Stockton,CA 95205. 2937 Veneman Ave.,#B240 Geo-Phase Environmental Inc. Phone(209)569-0293 Modesto,CA 95356 Fax(209)569-0295