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(12) <br /> <br />(13) <br /> <br />(14) <br /> <br />bo <br /> <br />Water, but no chemical agents, shall be used to control <br />dust as necessary. <br /> <br />Co <br /> <br />The City reserves the right to require additional <br />measures to be taken, if warranted by dust problems, <br />including but not limited to reducing stock pile heights. <br /> <br />do <br /> <br />221st Ave. from the entrance to the pit to US Trunk <br />Highway 169 as well as the parking and drive for the hot- <br />mix asphalt plant shall be paved. <br /> <br />..Hours of Operatio____~n <br /> <br />All mineral excavation, processing, and sales activities shall be <br />conducted between the normal hours of 7:00 a.m. and 7:00 p.m., <br />Monday through Saturday, except the hours for the hot-mix <br />asphalt plant can be extended by the Building and Zoning <br />Administrator for special cases. <br /> <br />.N, oise <br /> <br />ao <br /> <br />The noise from screening and crushing associated with <br />this operation shall be controlled by equipment location <br />on site, the placement of stock piles, and the type of <br />equipment used. <br /> <br />bo <br /> <br />Noise levels associated with this operation, shall at no <br />time exceed State standards. <br /> <br />Co <br /> <br />The City reserves the right to require additional <br />measures be taken, if warranted by noise. <br /> <br />Air Emissions <br /> <br />ao <br /> <br />The MPCA air emission permits for all equipment <br />associated with the mining and hot-mix asphalt <br />operations shall remain current. <br /> <br />bo <br /> <br />A maximum of 20 % opacity is allowed for emissions from <br />the hot-mix asphalt plant. <br /> <br />Co <br /> <br />Baghouse fin, es are allowed to be used in the hot-mix <br />asphalt. <br /> <br />do <br /> <br />That the baghouse is inspected for leaks once per month <br />during the construction season with the results copied to <br /> <br />f-'\shrdockb&zkstever\gravcup.doc <br /> <br /> <br />