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San Joaquin County Community Project Description Development Department -- backfilled to groundwater level and used as an approximately 24-acre agricultural pond. However,if less mining occurs than planned,more fines than expected are generated during mining,or a substantial amount of fill is brought to the site as backhaul from job sites,no pond would be left. Instead,the South Pit would be backfilled to existing topography and Stage III of the North Pit would be backfilled to a uniform grade 15 feet above groundwater,consistent with Stages I and H of the North Pit. The Applicant would bear all costs of reclaiming the site, as required by the Surface Mining and Reclamation Act(SMARA). — Environmental Commitments - Regulatory requirements enforced by the County and other governmental T agencies are measures that are required by law and are not considered mitigation measures. Many of these requirements reduce the potential impacts of a project to a less-than-significant level. The following measures are specific to the proposed project and are referred to in subsequent resource discussions where they serve to avoid or minimize the potential for an impact to occur;as such,they are not identified as mitigation measures. These regulatory requirements will be incorporated into the project design and will be included in all construction documents(e.g.,plans, specifications and estimates). The County will designate an Environmental Monitor to ensure compliance with the following environmental commitments. 1 General Commitments — ■ A water truck will be used for dust control. ■ The mobile fuel and lubrication truck will be equipped with automatic shut- off valves to prevent spills and will carry appropriate absorbent materials to contain and recover spills. ■ A Spill Prevention, Control, and Countermeasures Plan will be in place to guide reporting, control and cleanup activities in the event of a spill. ■ Onsite drainage will be retained in the settling ponds and reclaimed lake. Erosion or runoff control measures will be implemented near processing facilities to prevent offsite sedimentation. ■ A perimeter berm will be constructed to screen onsite activities from the views of passers-by on Koster Road and Blewett Road. ■ Inactive topsoil stockpiles will be sloped at III:I V or flatter and will be located at least 15 feet from active mining. Erosion control and weed control measures will be implemented as needed. ■ Avoidance, setbacks, and relocation of existing utilities at or adjacent to the project site. Project operations have been designed to avoid the PG&E DeSilva Gates Quarry Project Draft Environmental Impact Report 2_12 AS os+os os