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Estimated mini, m and maximum capacities Othe processing plant are 0 and" 350 tons per hour, respectively. * Waste materials produced from the processing operation are limited to the clays and fine silts suspended in the process water. Process water is recycled back through a series of two recycling/settling ponds, where clays and fine silts settle out. The water is recycled and used as process water for the plant. y� Some of the clays and fine silts are removed from the set-• tling ponds periodically and stockpiled on site for drying. This material may be sold or used for reclamation purposes such as leveling, construction of water management struc- tures, or as plant growth material for revegetation. ;Waste material remaining in the ponds will eventually be dewatered in place and used as fill material to reclaim the ponds. 18. Estimate quantity (gallons per day) and quality of water required by the proposed operation, specifying proposed sources of this water; method of its conveyance to the site; - t quantity and quality of used and/or surplus water; and dispo- sal of used and/or surplus water: The aggregate plant uses approximately three million gallons of water per day. The scrubber receives 4000 gallons of water per minute (gpm) to remove the clay from the sand and gravel. After the sand and gravel are discharged to the screen, another 2000 gpm of water is applied for a final rinse. The discharge from both of these operations is sent to a primary settling pond where flocculating agents are applied to settle most of the fines, i.e. clay and silts. i The water is then pumped into a secondary settling pond ! (make-up water pond) located southwest of the plant. This ipond has been expanded from a farm reservoir and subdivided into two sections by an earthen dike. The process water drains from the southern section of the pond into the north- ern reservoir where it is then pumped back to the plant. Little additional water is required for the process plant because the water is recycled and the fines that settle out of the process water form a natural liner for the pond. When additional water is required, such as during summer months when evaporation rates are high, the make-up pond is augment- ed by the production well. This well, as described in the groundwater section, is drilled to a depth of 700 feet and is { ,{ capable of pumping more than 1000 gpm, supplemental water requirements during the summer months are typically 10% of total process needs or 300, 000 gallons/day. i N I KRC Aggregate, Inc. 5 - April 1, 1994