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?M <br /> t .36 <br /> 1`7T A / <br /> 3330 Cameron Park Drive Suite 550 Cameron Park CA 95682 <br /> Phone:(530)676-6004 Fax(530)676-6005 <br /> PUBLIC NOTICE FOR CLOSURE OF ENVIRONMENTAL CASE <br /> Knowles Property,7835 Thornton Road (aka 1140 W. Hammer Lane),Stockton,California <br /> Background <br /> The subject property is a vacant lot located at the southwest corner of the intersection of West <br /> Include tank Hammer Lane and Thornton Road. Motor vehicle fuels were released to the subsurface at the <br /> removal date(s). subject property from a historical underground storage tank(UST) fuel storage system in the late <br /> 1980's, and San Joaquin County Environmental Health Department (SJCEHD) currently <br /> If available, stateregulates an environmental case at the property relati4 eqo this condition. Sinee--Itis--+i te; <br /> mass estimates. numerous actions have been performed to investigate and monitor the extent of petroleum <br /> A plume of impacted hydrocarbon impact to the subsurface. A relatively large excavation, extending to a maximum <br /> groundwater appears_depth-_of approximately 35 feet below ground surface, was completed in order to remove <br /> to have migrated oft- impacted sggp from the subsurface�' Between September 2012 and April 2015, ozone, a strong <br /> site under the City of oxidant, was injected into the shallow groundwater interval through a network of injection wells. <br /> Stockton right-of-way,Application of ozone results in a chemical reaction that can degrade petroleum hydrocarbons to <br /> but is not thought to <br /> have impacted other carbon dioxide and water. Ozone was applied within the area of the site with the highest <br /> properties. remaining concentrations of petroleum hydrocarbons in groundwater. Groundwater samples were <br /> collected from monitoring wells located near the injection area to evaluate remedial performance. <br /> State somewhere This data has indicated a substantial reduction in the concentrations of fuel contaminants in <br /> in the notice that groundwater. <br /> Stratus performed Proposed Closure of Environmental Case <br /> the work. <br /> Based on a aview of available data, the subject property has been remediated to a condition that <br /> Include statement will allow for SJCEHD to close out the environmental case on the property under the criteria of <br /> Low-Threat <br /> regarding low Underground Storage <br /> the State Water Resources Control Board's -1-ow-F rat L�14sure�alirs}--- Given-z#}s-ee itioa, <br /> threat to human on April 9, 2015, SJCEHD issued a letter to the owner of the subject property indicating that Policy Case <br /> se Cl sure <br /> health and that further remediation and testing of groundwater quality was no longer necessary. However,before <br /> vapor intrusion the environmental case can be closed, comments regarding the pending case closure are being <br /> poses a minimal solicited. "from the public and other interested parties <br /> threat. Further Information and Public Comment Opportunity <br /> Between N ye t& June 30, 2015, SJCEHD will be accepting public comments regarding the <br /> proposed CoacctiveAction_ Comments should be submitted in writing to Mr. Gabriel Gonzalez, <br /> 1868 East Hazelton Avenue, Stockton, California 95205. Mr. Gonzalez may also be reached at <br /> a onzal cehd.com or(209)468-3442. For further information regarding the environmental <br /> case 7835 Thornton Roa , please reference the State of California's GeoTracker Website <br /> (geotracker.w a.gov), site T060777$PP78. For further information regarding the State <br /> Water Resources Control Board's `> -T�-Clos�te Polir3L', we suggest entering the words <br /> `Low Threat Closure Policy' into an internet search engine; this should provide a link to a PDF <br /> version of this document within a State of California website(waterboards.ca.gov). <br /> 4- Ila CM Gco <br /> n� IIIfo t,1, <br />