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San Joaquin County Community Environmental Setting,Impacts,and Mitigation Measures Development Department Hazards and Hazardous Materials measure would ensure that potential hazards are reduced to less-than- significant levels. Mitigation Measure HAZ-2a: Require Submittal of a Hazardous Materials Management Plan Before construction begins,the operator will submit an IIMMP to San Joaquin County CES,prepared in accordance with the requirements of the California Business Plan Act. The management plan will also identify emergency procedures and an evacuation plan. The operator will implement the management plan at or before the start of construction. As part of implementation,the operator will ensure that facility employees are familiar with the plan and have ready access to �- safety equipment and Material Safety Data Sheets(MSDS). These sheets will describe the materials, storage and handling procedures,and emergency(spill or fire)procedures for on-site hazardous materials. The operator will implement a safety training program for employees working in the project area. r, The operator will be periodically inspected by San Joaquin County OES to determine compliance with the management plan. Site inspections typically include discussions with the plant manager and employees to ` determine the level of familiarity with the management plan. Facilities will also be inspected to ensure the presence and availability of proper safety equipment. Evidence of safety training will be required. Equipment to be used in the project area would include loaders,backhoes,a dragline excavator(under the wet pit option), and other types of excavation equipment. Because of their large size,these vehicles would be repaired on-site rather than being transported to an off-site repair facility. Waste oil from equipment servicing would be collected on-site in an aboveground storage tank and periodically hauled off-site by a certified waste management contractor. Releases of hazardous materials could result from improper storage and handling of waste oil,lubricating fluids,and other materials or during routine maintenance i of vehicles, including oil changes and chassis lubrication. Such releases on bare, permeable ground could contaminate soils and underlying groundwater resources. Groundwater contamination could result in a public health hazard and would be considered a significant impact. If precautions are not taken to contain contaminants,construction could produce contaminated stormwater runoff (nonpoint-source pollution)(see section 3.G,"Surface Water, Stormwater, and Water Quality,"for further discussion of this issue). Implementation of the following mitigation measure would ensure that potential hazards are reduced to less-than-significant levels. Mitigation Measure HAZ-2b: Require That Routine Vehicle Maintenance Occur in a Designated Area with an Impermeable Surface The operator will restrict all vehicle and equipment maintenance to a designated area with an impermeable surface. The surface will be DeSilva Gates Quarry Project Draft Environmental Impact Report 3.1-11 J85 05105.05