7.4. SR 05-16-2016 - Laserfiche WebLink

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7. Description of Ground Water, Surface Water, Draina2c Patterns, Air Quality: Ground Water The mining operation employs a variety of screening, crushing, and conveying equipment, including loaders and dozers. The lubrication, fueling, and repair practices used to maintain the equipment are designed to eliminate petroleum products from ground contact. The Storm Water Pollution Prevention Plan (SWPPP) addresses practices for proper storage, hauling, and use of petroleum products, as well as inspection and response procedures. The pollution prevention practices addressed on-site management planning to minimize the opportunity for infiltrating water to carry contaminants to groundwater. Plant foremen perform site inspections throughout the operating period. Observations and conditions are reported for all applicable environmental programs. Rain that falls in the mining area will be contained and allowed to seep naturally into the pit floor or be directed to on-site containment areas. When and where necessary to prevent surface runoff from entering the excavation, temporary small, earthen berms will be constructed to direct surface water flow from the active mine site. Surface Water The Minnesota Pollution Control Agency's Storm Water Pollution Control Program regulates this mining operation. Midwest Asphalt Corporation has an existing storm water plan for aggregate operations that employs Best Management Practices (BMP`s) for pollution prevention. The management practices listed in the plan addresses both petroleum products handling and erosion control, including the on property containment of storm water runoff for suspended solids control. All storm water and spring snowmelt water from within the mining operation is contained either in the excavation or on -property containment areas with overflow pipes. Drainage Patterns The only water leaving the site from the active mine area is the rainwater that falls on approximately one block of paved road which is swept as needed or that falls on undisturbed woods & meadow land. Site is inspected monthly when operating. All Trash is collected.