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Former storm water holding pond areas will be reclaimed in accordance with the approved reclamation plan. 4.0 SURFACE WATER DRAINAGE AND DRAINAGE CONTROL FACILITIES KRC prevents storm water runoff from the active portions of the site through the use of drainage control and holding facilities. Further, contamination of storm water is prevented by minimizing storm water contact with contaminant sources. 4.1 Quarry Runoff Controls Excavation in the Quarry has been conducted such that storm water runoff will flow into a holding pond rather than through the active quarry to a surface water drainage. In the event that the active quarry receives sufficient water that the holding pond capacity is overwhelmed, pollution prevention personnel (see Section 5.1) will pump water into makeup water settling ponds for storage. Figure 3 shows drainage control facilities associated with the Quarry. Material stockpiles in the handling and loading areas within the Quarry are unprotected from contact with storm water. Storm water is, however, contained within the Quarry as described above. The natural water content of the aggregates tends to minimize the generation of dust during excavation operations and thus minimize the potential spread of airborne dust outside of containment and control areas. Haul roads and access roads are watered to control dust. 4.2 Plant Runoff Controls The earthen area around the plant has been graded to slope towards the centerline of the plant. Product stockpiles are within the outer drainage control berm. Surface storm water coming into contact with the stockpiles drains to the slab area. The concrete slab underlying the plant is outfitted with a drainage network as depicted in Figure 5. Area drains are tied together via a 12-inch diameter pipe which daylights to the secondary settling pond west of the plant. Storm water which does not enter the area adjacent to the plant flows via surface drainage swales to the secondary settling pond. Materials that have been treated and stored in the area include finished product, by-product and waste product. Make-up water used in the processing operations is also treated and stored in the ponds to the west of the plant. Material loading and unloading in the Plant area is limited to that associated with movement of the various products to the truck loading area, and relocation of stockpiles and waste product. The generation of dust during Plant operations is minimized by continued wetting of the aggregate being processed, as well as 5txm Water Management Plan-HRC Aggepte Inc B5H Ptoj.d Na 592104.2 6 Pe iacd January 1994