5.1. PCSR 04-11-2006 - Laserfiche WebLink

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. . . Midwest Asphalt Corporation - 2006 CUP and License Application Page 2 If ~AC intends to excavate below the groundwater table, the CUP should require the development of a groundwater monitoring system and annual monitoring for potential groundwater impacts. If MWAC does not intend to excavate into the groundwater table, the final reclamation plan should be modified to increase the base grade elevations accordingly. Surface Water Conditions The surface water conditions are described on page 12 of the application and indicate that surface water is contained within the mining operation or within containment areas with overflow pipes. If an overflow pipe is associated with the containment area in the western portion of the site, it appears that offsite drainage would be to a wetland area further to the west. Containment areas or sedimentation ponds with outlets should be designed and constructed using accepted practices to handle the potential surface water flow. Environmental Spill Plan I recommend that the Emergency Spill Prevention and Counter Control Plan and a storm Water Pollution Prevention Plan (SWPP) be filed with the City. The current versions of these Plans should cover all areas and activities within the 2006 Operations Plan for the site. The Plans should provide that adequate spill kits be available at the site in strategic locations where spills may occur. I recommend that ~AC conduct maintenance of the site equipment on hard surface areas only, to facilitate containment of spills should they occur on the site. A specific refueling location(s} should be identified in the Plans in an area(s} where spill response can be effectively implemented. The refueling location(s} would ideally be an area(s} with a relatively impermeable surface, closed contours with minimal slope. Q:\A-C\CERI20Q6...026\DeliverableslMWA2006Review.doc 2