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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD <br /> CENTRAL VALLEY REGION <br /> 3443 Routier Road,Suite A, Sacramento,California 95827 <br /> PUBLIC HEARING <br /> concerning <br /> Consideration of Adoption of Waste Discharge Requirements <br /> (National Pollutant Discharge Elimination System Permit) <br /> for <br /> UNITED STATES DEPARTMENT OF DEFENSE <br /> DEFENSE LOGISTICS AGENCY <br /> DEFENSE DISTRIBUTION DEPOT SAN JOAQUIN <br /> SHARPE GROUNDWATER REMEDIATION SYSTEM <br /> SAN JOAQUIN COUNTY <br /> The United States Department of Defense,Defense Logistics Agency, owns and operates a <br /> groundwater remediation system designed to extract and treat groundwater contaminated with <br /> volatile organic compounds (VOC's). Groundwater is extracted from three distinct areas known as <br /> the South Balloon, Central, and North Balloon Areas. Cleanup of the plume is being conducted <br /> under the Comprehensive Environmental Response Compensation and Liability Act (CERCLA). <br /> The groundwater remediation system consists of approximately 40 extraction wells and three <br /> separate VOC treatment, air-stripping Groundwater Treatment Plants (GWTPs). Except for <br /> maintenance purposes, these three GWTPs operate continuously, and can treat and discharge a <br /> combined maximum design flow of 1,300 gallons per minute (1.9 million gallons per day(mgd)) of <br /> groundwater. Treated groundwater is discharged to the South San Joaquin Irrigation District <br /> (SSJID) Canal. The SSJID Canal is a constructed agricultural drain,which collects and conveys <br /> irrieation return flows and stormwater during rain events. The SSJID Canal flows from south to <br /> north along the eastern edge of the DDJC-Sharpe facility, emptying into French Camp Slough <br /> approximately 1.5 miles north of the DDJC-Sharpe facility. French Camp Slough subsequently <br /> flows northeast to the Sacramento-San Joaquin Delta,discharging to the San Joaquin River <br /> southwest of Stockton. This proposed Order retains technology based effluent limitations for total <br /> VOCs. This Order includes interim receiving water and effluent limitations arsenic, and requires a <br /> study to evaluate whether additional protection is needed. This proposed Order requires <br /> development of a mass limitation for mercury, and also includes a provision requiri:,s sampling and <br /> reporting of NTR, CTR, and additional constituents to determine if the discharge h a:: a reasonable <br /> potential to cause or contribute to an in-stream excursion above water quality standards. This Order <br /> maybe reopened and effluent limitations added for the subject constituents where necessary., <br /> A formal public hearing considering this matter will be held during the Regional Burd Meeting' <br /> which is scheduled for: <br /> DATE: 5 and 6 December 2002 <br /> TIME: 8:30 a.m. <br /> PLACE: Central Valley Regional Water Quality Control Board <br /> 3443 Routier Road, Suite A <br /> Sacramento, Ca 95627 <br /> The designated parties for this hearing are as follows: <br /> • Staff of Central Valley Regional Board <br /> • Representatives of the United States Department of Defense <br />