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waste marble piles and are shown on Exhibit E: Mining Plan Map. No significant new roads are <br /> envisioned, although existing roads may be relocated slightly or extended as waste is added to <br /> the piles. The waste piles are quite porous so even during heavy rainfall or spring snow melt <br /> periods, water drains through the piles and into the sediment control structure at the toe of the <br /> waste pile, then into Yule Creek. The pH of the water runoff tends to be slightly high (basic). <br /> Yule Creek tends to be acidic, so the result may be a very slight improvement in the quality of <br /> Yule Creek water. <br /> h Water: The primary non-potable water use at the quarry is for cooling, dust control, <br /> and saw cuttings flushing of the diamond wire saws, chain saws, and drills used in the stone <br /> cutting operations. Each saw(there are 6 planned) requires a steady flow of 5 to 10 gallons per <br /> minute. The continuous circulation rate should not exceed 30 gallons per minute. This rate is <br /> not consumptive since the water is reused from settling ponds and sumps in the quarry. Water <br /> from seepage into the quarry from surrounding formations is the source of this circulating, non- <br /> potable water requirement. Past experience by CYNIC indicates the quarry generates excess <br /> water in the sumps during spring runoff periods. At these times, some water needs to be <br /> discharged (see section(e) above). Potable water will be brought to the sight as required. <br /> Sanitary waste facilities will be portable toilets and will not require water. No change room <br /> facilities will be located on site and no related water use will be required. <br /> (i) Ground and Surface Water: There has been no significant effect on the quantity <br /> and quality of ground water or surface water from CYMC's past operations, and none is <br /> anticipated with Sierra's operations. Sierra has prepared a Stormwater Management Plan in <br /> compliance with the rules defined by the Water Quality Control Division of the Colorado <br /> Department of Health. This plan includes the use of Best Management Practices for storm water <br /> runoff from the site. The diesel fuel tank is placed within a heavy membrane lined berm <br /> structure whose volume exceeds the capacity of the tank. Operating practice will include <br /> keeping the discharge valve of the main tank closed and locked during non-operating hours. <br /> (i) Water Rights: A well permit was acquired by CYMC from the Colorado Division of <br /> Water Resources. Sierra has applied for transfer of ownership of the well permit (Permit No. <br /> 034872-F) and anticipates receiving confirmation of the transfer by the end of May 1999. <br /> According to personnel at the Colorado Division of Water Resources, transfer of the well permit <br /> does not require regulatory approval as the well permit goes with the owner or lessee of the land. <br /> There has been no reported effect on existing water rights from CYMC's past operations, and <br /> none is anticipated with Sierra's operations. <br /> (k) Refuse, Acid, and Toxic Materials: The quarry operation generates no refuse, acid, <br /> or toxic materials other than the waste marble to be placed on the surface as discussed above. <br /> Maintenance of diesel powered equipment will generate waste oil and other fluids that will be <br /> transported off site and disposed of in an approved manner. Other refuse will be transported off <br /> site and disposed of in an approved manner. <br /> 17 <br />