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y 8 <br /> INFORMATION SHEET <br /> ORDER NO. R5-2007- <br /> CITY OF TRACY AND LEPRINO FOODS COMPANY <br /> LAND DISCHARGE UNITS OF THE TRACY WASTEWATER TREATMENT PLANT <br /> SAN JOAQUIN COUNTY <br /> order to meet BPTC requirements, the Discharger plans to pave the drying beds with <br /> asphaltic concrete to provide a relatively impermeable barrier, reducing percolation to <br /> the underlying groundwater. The Discharger has scheduled the paving of the drying <br /> beds over four phases, with completion of paving all drying beds in 2016. The paving <br /> of the sludge drying beds with asphaltic concrete may not meet the requirements of <br /> BPTC. Provision E.1.f requires the Discharger perform a systematic and <br /> comprehensive technical evaluation of each major component of the Facility's waste <br /> treatment and control to determine for each waste constituent BPTC as required by <br /> Resolution 68-16, including an evaluation of the Facility's biosolids dewatering <br /> system. <br /> C. Stormwater Requirements. U.S. EPA promulgated Federal Regulations for <br /> stormwater on November 16, 1990 in 40 CFR Parts 122, 123, and 124. The NPDES <br /> Industrial Storm Water Program regulates storm water discharges from municipal <br /> sanitary sewer systems. Wastewater Treatment Plants are applicable industries <br /> under the stormwater program and are obligated to comply with the Federal <br /> Regulations. <br /> IV. Groundwater Limitations. <br /> A. The beneficial uses of the underlying ground water are municipal and domestic <br /> supply, industrial service supply, industrial process supply, and agricultural supply. <br /> B. Basin Plan water quality objectives include narrative objectives for chemical <br /> constituents, tastes and odors, and toxicity of groundwater. The toxicity objective <br /> requires that groundwater be maintained free of toxic substances in concentrations <br /> that produce detrimental physiological responses in humans, plants, animals, or <br /> aquatic life. The chemical constituents objective states groundwater shall not contain <br /> chemical constituents in concentrations that adversely affect any beneficial use. The <br /> tastes and odors objective prohibits taste- or odor-producing substances in <br /> concentrations that cause nuisance or adversely affect beneficial uses. The Basin <br /> Plan also establishes numerical water quality objectives for chemical constituents and <br /> radioactivity in groundwaters designated as municipal supply. These include, at a <br /> minimum, compliance with MCLS in Title 22 of the CCR. The bacteria objective <br /> prohibits coliform organisms at or above 2.2 MPN/100 ml. The Basin Plan requires <br /> the application of the most stringent objective necessary to ensure that waters do not <br /> contain chemical constituents, toxic substances, radionuclides, taste- or odor- <br /> producing substances, or bacteria in concentrations that adversely affect municipal or <br /> domestic supply, agricultural supply, industrial supply or some other beneficial use. <br /> C. Based on analytical data provided by the Discharger, the industrial wastewater ponds <br /> may be adversely affecting groundwater. EC concentrations in the treatment ponds <br /> and down gradient groundwater wells exceed background groundwater <br /> concentrations. Furthermore, the sludge drying facilities are not in compliance with <br /> BPTC and may be degrading groundwater. <br />