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Erosion Control: Erosion control will comply with an approved stormwater pollution prevention plan (SWPPP). Best Management practices will be utilized, including installation of a silt fence along the perimeter of the recycle staging area. Silt fence will also be placed around the resultant crushed material stockpile to prevent erosion prior to re-use of the material as road base. Dust Control: Dust will be managed on site per the Minnesota Pollution Control Agency's standards for non-metallic processing plants. Dust results from handling materials having a high percentage of content that would pass through a#200 sieve (200 openings per square inch). Silts and clays can have 50% or more material passing the #200 sieve. Recycle aggregate base materials have a content ranging from 3 to 7% that would pass through a#200 sieve. Additionally, fractured concrete particles tend to form a crust once they are stockpiled; this crust minimizes the amount of dust that is generated. During the crushing process, spray bars on the crushers add water to the resultant pile to assist in crust formation. Stockpiles are monitored weekly to determine the moisture content and additional water is added if needed; a minimum moisture content of 1.5% is required. In areas of truck and equipment traffic, water will be applied to control and prevent fugitive dust. Street sweeping will be einployed as necessary to maintain dust free public roadways. Vibrations: A seismograph will be installed to monitor vibrations at the beginning of the crushing cycle to confirm vibration thresholds are not exceeded. Any vibrations in excess of acceptable thresholds will result in the crushing operations being modified to conform to levels which prevent noticeable impacts to adjacent properties. Please contact me with any questions you may have or if further information is required. Sincerely, Ro tlund Homes ,, Theresa A Greenfield Director of Land Developm nt Cc: Joe Samuel, RLK Incorporated