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Former Beacon Station No 12419 March 18, 2002 <br /> Stockton,California _. Problem Assessment Report/Corrective Action Plan <br /> 12.5 Proposed Verification Monitoring <br /> Quarterly groundwater monitoring would continue to be performed to evaluate plume <br /> concentration trends and stability, bio-attenuation parameters, and verify the effectiveness of <br /> the remedial systems Petroleum hydrocarbon constituent concentrations in groundwater <br /> should decrease because of the remedial actions and attain a level at which natural <br /> attenuation could proceed with measurable results If groundwater analyses indicate <br /> decreasing concentrations of petroleum hydrocarbons over time, it is Horizon's opinion that <br /> the site would eventually qualify for regulatory site closure <br /> 13.0 DISTRIBUTION <br /> A copy of this PAR/CAP should be forwarded to <br /> Mr Gordon Boggs <br /> Regional Water Quality Control Board <br /> Central Valley Region <br /> 3443 Routier Road, Suite A <br /> Sacramento, California 95827-3098 <br /> Mr Michael Infurna Jr <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 East Weber Avenue, Third Floor <br /> P O Box 388 <br /> Stockton, California 95201-0388 <br /> 419PARCAP3-02 doc 29 <br /> Project No 1419 23 HORIZON ENVIRONMENTAL INC <br />