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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD <br /> CENTRAL VALLEY REGION <br /> ORDER NO. R5-2002-0213 <br /> NPDES NO. CA0081931 <br /> WASTE DISCHARGE REQUIREMENTS <br /> FOR <br /> U.S. DEPARTMENT OF DEFENSE <br /> DEFENSE LOGISTICS AGENCY <br /> DEFENSE DISTRIBUTION DEPOT SAN JOAQUIN <br /> SHARPE GROUNDWATER REMEDIATION SYSTEM <br /> SAN JOAQUIN COUNTY <br /> The California Regional Water Quality Control Board, Central Valley Region, (hereafter Regional <br /> Board) finds that: <br /> 1. The United States Department of Defense, Defense Logistics Agency, Defense Distribution <br /> Depot San Joaquin (hereafter Discharger) submitted a Report of Waste Discharge, dated 1 June <br /> 2000, and applied for a permit renewal to discharge treated groundwater under the National <br /> Pollutant Discharge Elimination System (NPDES) from the Discharger's three groundwater <br /> treatment plants (GWTPs). Supplemental effluent and receiving water data was submitted <br /> electronically to complete the application on 20 February 2002. <br /> 2. The Discharger owns and operates a treatment and disposal system designed to extract and treat <br /> groundwater contaminated with VOC's. Currently, groundwater is extracted from three distinct <br /> areas known as the South Balloon, Central, and North Balloon Areas. Cleanup of the plume is <br /> being conducted under the Comprehensive Environmental Response Compensation and Liability <br /> Act (CERCLA). Groundwater cleanup for the South Balloon began in 1987. Groundwater <br /> cleanup in the North Balloon and Central Area began in 1990 and 1995, respectively. The <br /> groundwater remediation system consists of approximately 40 extraction wells and three separate <br /> VOC treatment, air-stripping GWTPs. The GWTPs are in Section 24, TIS, R6E, MDB&M and <br /> are shown on Attachment A,which is a part of this Order. <br /> 3. Except for maintenance purposes,these three GWTPs operate continuously, and can treat and <br /> discharge a combined maximum design flow of 1,300 gallons per minute (1.9 million gallons per <br /> day(mgd)) of groundwater. <br /> 4. From the GWTPs, piping conveys the treated groundwater to the El Paso Energy holding tank <br /> located on the south end of the Sharpe facility. El Paso Energy co-generation plant may use up <br /> to approximately 0.72 mgd of treated groundwater each day. Effluent which is not used by El <br /> Paso Energy is discharged from the holding tank to the storm sewer system that discharges via <br /> Outfall 001 to the South San Joaquin Irrigation District Canal as shown in Attachment B, a part <br /> of this Order. The Central Area treatment system also includes optional piping to the on-site <br /> injection wells and percolation ponds. <br /> 5. The RWD and Draft FFA Annual Progress Report(URS, December 200 1) described the treated <br /> groundwater discharge volumes as follows: <br />