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Commercial Asphalt Page 2 <br /> March 22, 1994 <br /> • • In response to complaints regarding noise from the plant, Commercial <br /> Asphalt modifies burner noise and testing was completed to verify <br /> compliance with noise limits. <br /> • In response to complaints regarding odor, Commercial Asphalt raised <br /> their stack height and cut back on recycled asphalt during weather <br /> inversions. <br /> • Acceleration lane was built on Highway 169 making truck access safer. <br /> 1992 <br /> • Latest renewal of the conditional use permit. <br /> • Complaints on noise and odor subsided. <br /> • Since the 1992 renewal, the drum at the plant was increased from 30 feet <br /> in length to 36 feet and its diameter increased from 9 feet to 10 feet. <br /> Increasing the size of the drum keeps the burner farther away from the <br /> recyclable entry point further reducing odor. <br /> ANALYSIS <br /> Apparently, Commercial Asphalt is asking for their last renewal of this <br /> permit. They have indicated that they plan to move their plant to an area <br /> further north along Highway 169, outside of Elk River City limits. They <br /> IDanticipate this move being accomplished in the next year or two. The <br /> rational for moving the plant is to be located adjacent to their gravel supply. <br /> On the attached site plant, you will note the location of the looped access road <br /> for the plant. Commercial Asphalt plans on paving this access road, which <br /> will help further reduce dust. The asphalt used on this road can be recycled <br /> in the future. <br /> Included in the April 8, 1992, staff memo to the City Council are 14 <br /> stipulations placed on the operation of this facility. If this permit is renewed, <br /> those 14 stipulations are still appropriate. <br /> There is one additional concern not previously addressed. Directly adjacent <br /> to the east side of Highway 169, opposite Commercial Asphalt's facility, is a <br /> pond that is receiving sediment from run-off. Staff has inspected the <br /> situation and feels the pond is receiving sediment from the acceleration lane <br /> on the west side of Highway 169, via a culvert under the Highway. The <br /> following is a list of possible solutions to this situation: <br /> 1. Commercial Asphalt could dig a bigger storm water retention pond on <br /> their site. The berm on the north side of this retention pond could also <br /> . be built up to avoid run-off entering the highway ditch during heavy <br /> rainfall events. <br /> pcca.doc <br />