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INFORMATION SHEET 2 WASTE DISCHARGE REQUIREMENTS ORDER NO.R5-2004-XXXX DEFENSE DISTRIBUTION DEPOT SAN JOAQUIN SHARPE WASTEWATER TREATMENT FACILITY SAN JOAQUIN COUNTY Based on flow monitoring data collected by the Discharger from January 2003 to December 2003, the average dry weather flow to the wastewater treatment plant is approximately 42,000 gallons per day(gpd). The Discharger is currently operating the treatment plant at 10 to 15% of design capacity(380,000 mgd) and an increase in wastewater flows in the next five years is not expected. The previous Waste Discharge Order,No. 92-184 (NPDES permit No. CA0003905), allowed discharge of treated wastewater to the South San Joaquin Irrigation District Canal. DDJC-Sharpe has requested rescission of the NPDES permit. The NPDES permit also included requirements for discharge of storm water to the South San Joaquin Irrigation District Canal. Therefore, DDJC-Sharpe has applied for coverage under the General NPDES Industrial Stormwater Permit (Order No. 97-03-DWQ). This Order does not allow discharge of any industrial wastes or treated groundwater from site cleanup activities to be discharged to the domestic waste system. Basin Plan, Beneficial Uses, and Regulatory Considerations The Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Fourth Edition (Basin Plan), designates beneficial uses, establishes water quality objectives, and contains implementation plans and policies for all waters of the Basin. Beneficial uses often determine the water quality objectives that apply to a water body. For example,waters designated as municipal and domestic supply must meet the maximum contaminant levels (MCLs) for drinking waters. The Basin Plan sets forth the applicable beneficial uses (industrial, agricultural, and domestic supply in this instance) of groundwater, procedure for application of water quality objectives, and the process for and factors to consider in allocating waste assimilation capacity. Antidegradation The antidegradation directives of Section 13000 of the California Water Code require that waters of the State that are better in quality than established water quality objectives be maintained"consistent with the maximum benefit to the people of the State." Waters can be of high quality for some constituents or beneficial uses and not others. Policies and procedures for complying with this directive are set forth in the Basin Plan (including by reference State Board Resolution No. 68-16, "Statement of Policy With Respect to Maintaining High Quality Waters in California,"or"Antidegradation"Policy). Resolution 68-16 is applied on a case-by-case, constituent-by-constituent basis in determining whether a certain degree of degradation can be justified. It is incumbent upon the Discharger to provide technical information for the Board to evaluate that fully characterizes: