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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION ORDER NO. WASTE DISCHARGE REQUIREMENTS T FOR DEFENSE DISTRIBUTION DEPOT SAN JOAQUIN E SHARPE WASTEWATER TREATMENT FACILITY SAN JOAQUIN COUNTY The California Regional Water Quality Control Board, Central Valley Region (hereafter Regional N Board), finds that: 1. On 5 March 1997, the Defense Distribution Depot San Joaquin(hereafter Discharger) submitted T a Report of Waste Discharge (RWD) for treatment and disposal to surface water of municipal wastewater generated at the Sharpe facility. Subsequent to this submittal, the Discharger decided to not seek renewal of the National Pollutant Discharge Elimination System (NPDES) permit No. I 92-184, and instead apply for a permit to discharge treated wastewater to land within the Discharger's facility. Although a RWD for land discharge has not been submitted,the Discharger has provided the necessary information to prepare this permit through monthly performance monitoring reports, the October 1999 Water Management Report, and other supplemental reports. 2. For the purposes of this Order,the wastewater treatment facility (WWTF) shall mean the I wastewater treatment plant, the wastewater storage ponds, and the designated land application areas. The facility site location is shown on Attachment A, which is attached hereto and made part of this Order by reference. v 3. The discharge is presently governed by Order No. 92-184, adopted by the Board on 25 September 1992, which includes NPDES permit No. CA0003905. Order No. 92-184 prescribed E discharge to the South San Joaquin Irrigation District (SSJID) Canal. The Discharger has evaluated the available percolation pond adjacent to the WWTF and concluded that the pond is adequate for disposal of the anticipated long-term wastewater flows from Sharpe. Effluent from the WWTF may also be discharged to a temporary percolation pond south of Building 404. Storm water discharges to SSJID Canal are also covered under Order 92-184 and the Discharger has applied for coverage under the General NPDES Industrial Stormwater Permit(Order No. 97- 03-DWQ). Wastewater Treatment and Disposal System 4. The treatment facility and land application areas are in the northeast 1/4 of Section 24, T1 S,R6E, MDB&M, as shown on Attachment A. Industrial developments comprise most of the land usage immediately north, east, and south of the facility and land application area. The area west of the facility is primarily residential, but some commercial and industrial entities are also present. The SKID Canal and the Union Pacific Railroad are adjacent to the eastern property boundary. The