2009-07-22_REVISION - M1987113 - Laserfiche WebLink

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a. Copies of the permits for the Rocky Flats mine are attached. They include the Concrete Batch Plant Air Pollution Permit, the gravel mine Air Pollution Permit, a copy of the Stormwater Management Plan (SGMP) a copy of the Jefferson County approval for the mine and con- crete plant and the raw water agreement covering water used at the mine. The mine Air Pollution Permit covers the Church and Rocky Flats pits. I have also attached a revised Exhibit N - Other Permits and Licenses listing the permitting requirements for the mine. 2. The wash plant is not in the Rocky Flats Pit. The water used at the mine is not ground water. A copy of the water purchase agreement between Bestway Concrete and Smart Reservoir & Irri- gations Company showing the water being used by the mine is purchased for that use. 3. Mr. Jeff Deathridge at the office of the State Engineer was contacted regarding the stormwater that has collected in the bottom of the mine. Since this could be considered ground wa- ter, he advised we work to keep it from accumulating for more than 72 hours. If this presented a problem, he advised we contact the local water commissioner for direction on how this problem should be handled. Jeff agreed that we could pump the water out and spray on undisturbed areas to facilitate evapo- ration or infiltration. Steve O'Brian contacted the Colorado Department of Health in the 1990's when the same issue was raised on the Church Pit. They told him that the water could not be discharged from the mine without a permit. A permit could not be issued because the Total Suspended Soils in the water could not be removed so the water met water quality standards. They said a sprinkler system could be used to spray the water on the surface and let it soak into the ground. We installed a pump and sprinkler system north of the excavated area and began pumping on July 16, 2009. 4. Enclosed a revised Mining Plan Map showing the location of the Concrete Batch Plant. This map is of the Rocky Flats pit so does not include the wash plant and the fresh water storage pond (your sedimentation pond). The location of the roads and ditches are accurately depicted on this map as they were on the 2009 Annual Report Map. We believe that you were confused when on the site, in that you thought the processing area was on the Rocky Flats Pit while in reality it is on the Church Pit. Attached is an air photo showing the permit boundaries for the three M.L.R.B. permits that cover the areas of distur- bance. This should help you to better understand the rela- tionship of the processing site and the Batch Plant. MWrT.TTS TAN 2