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i - Project Description Tracy Material Recovery Fadlity and Transfer Station Expansion 30703 5 MacArthur Drive, Tracy, Calffomia 95377 • Storing recycled materials on a slightly sloping paved area (to prevent ponding) with a drainage system. Prevent run-on and runoff by directing drainage around storage areas. • Sweeping parking areas, storage areas, and processing areas regularly to remove fine particles of material and dust. • Storing household hazardous materials from the load checking program in an approved household hazardous materials storage compartment and in accordance with federal, state, and local requirements. • Conducting all vehicle maintenance within the existing maintenance shop at the facility. • Spill prevention, control, and cleanup program Training employees in implementation of BMPs The amount of free liquids expected to be generated from solid waste transferring activities within the fully enclosed transfer station are minimal, even during inclement weather. As a preventative measure, the concrete slab within the MRF/TS building has been slightly concaved to pond any free liquid on the tipping pad where drier solid waste can absorb the liquids as the solid waste is processed for transferring into the loading bays. Should liquids become excessive, chipped green waste from the, compost operations can be applied to the tipping pad area to absorb the liquids. The materials would then be transported off-site for disposal at a permitted solid waste facility. ` The Tracy MRF & TS is designed in a manner that rain water that falls on the building will be treated as storm water and be disposed of in the storm water system. Storm water generated by rainfall in the ramp to the covered loading bays will be managed as storm water as grated trench drains will be put in place to not have this storm water come in contact with any solid waste within the covered loading pit. Drains are in place at the end of each ramp to collect the storm water and pump it up to the storm water collection system. Liquids from the loading pit area will be managed as wastewater. The amount of liquid will be minimized due to the drainage controls at each end of the ramp and the covered loading bays where rain water will be directed away from the loading bay. Some liquids may be generated off the tipping pad even with the slightly concave design of the floor. The final design will allow the contact liquids from the loading pits to flow through a clarifier to remove solids, then to an on-site storage tank. The tank will be pumped as frequently as necessary to prevent overflow. Wastewater from the tank will be pumped and transported to an offsite sanitary sewer dump station or directly to a POTW in the local area. No storm water or free liquids will be disposed of in the proposed or existing septic system. Only toilets, sinks, and other office or locker room type facilities will be drained into the septic systems. 1 _ 36 170.18.03 CUP Project Description 050710