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In the future (post-mining) , the sludge will be <br /> disposed of in a properly-permitted landfill . <br /> 5. Q. Is there any possibility that contaminants from <br /> industrial water may seep out of the Arkansas <br /> River settling ponds into the Arkansas River? <br /> A. There are two systems of settling ponds in the <br /> Arkansas River drainage, both located <br /> immediately below the loop in Highway 91 : <br /> 1. The Storke Settling Ponds are used to <br /> settle industrial water from the Storke <br /> Crusher and Yard before it is returned by <br /> pumping to the industrial water system. <br /> This water results primarily from cleanup <br /> operations and from crusher air pollution <br /> control scrubbers . It does not include <br /> effluent from sequential milling processes . <br /> With the 1978 relocation of the Arkansas <br /> River to the opposite side of the valley, <br /> the river and settling ponds are at approx- <br /> imately the same elevation, and are sepa- <br /> rated by a 20-foot mined-out depression. <br /> As noted in the reclamation plan, these <br /> ponds will be replaced with concrete-lined <br /> settling ponds above the highway loop in <br /> 1982. The existing ponds will be mined <br /> away upon resumption of the aggregate <br /> operation. <br /> 2. The Arkansas aggregate operation settling <br /> pond is situated in a portion of the mined- <br /> out aggregate area. An NPDES permit covers <br /> discharges from the pond. Aggregate mining <br /> will resume soon, and will cease in the <br /> mid-1980s. Reclamation is proceeding as <br /> proposed . <br /> No seepage has been detected from these ponds, <br /> and the potential appears to be low. The <br /> Arkansas River is regularly monitored to provide <br /> early warning of contaminants in the water . <br /> 6. Q. What happens after the wire holding the gabions <br /> in the interceptor canals disintegrate? How <br /> will canal stability be affected? What CFS were <br /> the canals designed to handle? What is the <br /> probable maximum flood in CFS? <br /> -7- <br />