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MEMORANDUM <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD - CENTRAL VALLEY REGION <br /> 3443 Routier Road, Suite A Phone: (916) 361-5600 <br /> Sacramento, CA 95827-3098 ATSS Phone: 8-495-5600 <br /> TO: Antonia K. J. Vorster FROM: John J. Tomko <br /> Senior Engineer Associate Engineer <br /> San Joaquin Regulatory <br /> DATE: 12 July 1990 SIGNATURE: <br /> J <br /> SUBJECT: REMEDIAL ACTION PLAN, MCCORMICK AND BAXTER, STOCKTON. SAN JOAQUIN COUNTY <br /> I have reviewed the final Phase I Remedial Action Plan for the McCormick and Baxter <br /> facility. This report was submitted on 29 May 1990. The Phase I remedial actions will <br /> be implemented for five years, after which the actions will be reevaluated and modified <br /> if necessary. The Phase I remedial actions are: <br /> - Capping of the highly contaminated areas with 4 inches of asphalt. <br /> - Construction of a new concrete drip pad in the track area. <br /> - Cleanup of the storm ponds and installation of a double liner. <br /> .h� rig t S <br /> - Construction of railroad drip tracks. I ' <br /> E ,. <br /> - Pilot testing of a biological soil treatment process. ,�u L 2 7 1°gn <br /> - Aquifer use restrictions. ;-.NVIRONMEN TAL HE,AJ�- <br /> PERN!IT/SER,Vi C,E'S' <br /> - Installation of a ground water extraction system. <br /> - Monitoring of the extraction system. <br /> - Transport to and treatment at the Stockton Regional Wastewater Control Facility. <br /> - Grouting of sanitary sewers. <br /> - Air monitoring studies. <br /> - Offsite soil sampling. <br /> The major highlights of the proposed Phase I groundwater cleanup system follows: <br /> 1) The remedial action objective for this system is to minimize possible future <br /> threats to public health from direct consumption and dermal exposure of <br /> contaminated groundwater. <br /> 2) The remedial action goals for the chemical of concern were based upon the <br /> lowest value of the following criteria: <br /> - Drinking water standards. <br />