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currently operate under the terms and conditions of air permits and emission control plans approved by the Air Pollution Control Division of the Colorado Department of Health. The existing air permits will be used for the processing facility at Rockin' WP-North while the particulate emissions control plan applies to both the current milting operation and to future mining. All new processing equipment will have appropriate air permits from the State of Colorado Air Pollution Control Division. Over the past twenty years, particulate emissions from Lyons have been successfully controlled using a number of measures including the following: • Use of conveyors rather than haul vehicles to transport excavated sand and gravel to the processing plant. • Concurrent mining and reclamation reduce the amount of land disturbed at any one time. • Moistwe content of excavated sand and gravel serves to reduce process emissions. • Future sand and gravel washing operations produce little if any particulate emissions. Water Pollutiou Control Water pollution control at the Lyons site is regulated tinder the Clean Water Act at both the federal and state levels. Section 404 of the Clean Water Act is intended to protect waters of the United States including wetlands. This program is administered by the U.S. Army Corps of Engineers. At the state level, [he Water Quality Control Division of the Colorado Department of Health regulates storm water runoff and the national pollution dischazge elimination system (NPDES) program. Regarding storm water runoff, the State Division of Water Quality Control has implemented a general permit for the sand and gravel producer. Under requirements of this general permit, Westem Mobile has produced a storm water management plan (SWMP) that is used to minimize pollution associated with storm water runoff from their existing Lyons operation. This SWMP will be expanded to include the property that is part of this special use application. The State Division of Water Quality Control also regulates water discharges from sand and gravel mining through the NPDES program. In this case, ground water pumped from the mining azea cannot be discharged from the property without an approved NPDES permit. These petTrtits require the operator to periodically sample the water that is discharged from the property and not to exceed specific pollutant Western Mobile Lyons -Rockin' WP M-2