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Personnel working with the 'load screening program* and on the "tipping floor shall have 40 hours of OSHA training on spill containment, personal protective equipment, and the handling of recyclable household hazardous materials. OSHA regulations require all workers handling hazardous materials to undergo 40 hours of approved training. Approved hazardous materials storage areas shall be provided at the facility, and all hazardous wastes discovered as a result of load screening and processing shall be appropriately stored, per the requirements of the Department of Toxic Substance Control. Implementation of these mitigations will reduce the potential impacts to ground water to a less - than -significant level. Impact 4.5-3 Ground water for the project will be extracted from an aquifer which may already be in overdraft. The San Joaquin County Flood Control and Water Conservation District has expressed concern in the past regarding the over drafting of the ground water basins in the County. San Joaquin County policy requires that no additional demands be placed on the water supply system above current use by a proposed development. Ground water quantity can be affected if the balance between recharge and pumping is altered by the project or if the distribution of recharge and pumping between the shallow and deep aquifer systems is altered. The area of San Joaquin County in the project vicinity is not presently in a ground water overdraft condition. In general, ground water levels in this area have either stabilized or increased over the past twenty years. The concern for future problems of overdraft is substantial. Large population growth in the Central Valley, changes in water allocation to water and irrigation districts, higher costs for surface water supplies and other factors could result in increased pumping of ground water in the region. As a project dependent upon ground water, this project would contribute incrementally to the cumulative potential increase in ground water use. Project water use is anticipated to be much less than the water usage resulting from conventional agricultural production at the site. This impact is deemed to be less -than -significant. Mitigation 4.5-3 No mitigation is required or recommended. Impact 4.5-4 Development of the Impervious surfaces required for project operation may Interfere with ground water recharge. The construction of buildings, liners, and paved surfaces will result in an increase in impervious surfaces at the site. The resulting patterns of storm drainage, runoff and infiltration may change in a manner which reduces the amount of recharge at the site. Percolation of waters to the subsurface will be reduced. The presence of stratified clay layers occurring naturally in the subsurface also serves to impede recharge through the ground surface, and causes localized perched water tables in the vicinity of the site. The probable loss of recharge, relative to existing conditions, is a relatively small 11 ER -93-1 -71 - (9-27-93) 1