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RE: Renewal of Summit County Conditional Use Permit and Amendments for Maryland Creek Ranch Sand and Gravel Primary access to the site is currently maintained at the northern access road. A limited number of trucks will begin using the southern access point after final approval of the May 2001 amendment and construction of the access point as per the Colorado Department of Transportation access permit. Pertormance Standards and Mitigation Air uali We are in compliance of all air quality standards and throughput limitations as detailed in our state air permits issued by the Colorado Department of Public Health and Environment Air Pollution Control Division (CDPHE-APCD). All opacity tests at the Maryland Creek Ranch have shown that the various equipment -screens, crushers, and concrete and asphalt plants are all operating in compliance and are way below the county, state and federally required opacity limitations. The baghouses (dust collector equipment) on the concrete and asphalt plants are maintained as per the manufacturer's standards. We are in compliance with our dust control plan, and mitigate any fugitive dust through the following measures. If topsoil and overburden stockpiles are to remain in place for more than 45 days, they are revegetated. Stockpiles and roads are watered whenever necessary, and speed limits are at 25 m.p.h. or below throughout the site. We also have concurrent reclamation, which limits disturbance. We have volunteered to have our asphalt plant be apart of aindustry-compliance study conducted by a joint team from the Colorado Asphalt Paving Association and the CDPHE-APCD Water Quality We are in compliance with our state CDPES permit and conduct monthly water monitoring for any discharge points. Water and sanitation facilities have been installed as per Summit County Health requirements. All stormwater drainage throughout the processing area Is directed through culverts and pipes which lead to the detention ponds near the plant entrance. Storrnwater drainage in the current mining area is directed into and contained within the excavated area. The water used in the aggregate wash plant is pumped from the Cell 1, and then redirected through culverts and pipes back into Cell 1 to be recycled and used again in the wash plant. The closed-circuit water recycling allows for less water use and settling of any fines into Cell 1. The wetland areas adjacent to Cetls 1 and 2 are protected with silt fencing. Fuels and chemical containment is maintained and inspected on a regular basis. The fuel tanks are Convault tanks, which are double-walled concrete lined tanks. Chemicals for maintenance and for concrete production are all stored inside buildings. The oil for the asphalt is stored in a tank which is placed within a concrete containment structure. LM/MCR-cuprenewal•summit•070201.doc 4