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Page 7 <br />h. The wells located at the site shall be monitored once a <br />year for diesel range organics (DRO). Mining activities <br />shall not take place closer to ground water levels than <br />indicated in the plans submitted without amending this <br />conditional use permit; however, if mining is proposed to <br />occur below the water table in the future, the above <br />referenced wells shall be monitored for DRO prior to <br />excavation activities commencing and after their <br />cessation each year. Further, in the event of a spill, <br />appropriate water tests (as determined by the city) will be <br />taken until the spill is deemed clean by the city. <br />i. Except for minor repairs, maintenance of vehicles and <br />equipment shall take place in the Operator's shop. The <br />Operator shall have an approved hazardous waste license <br />for this facility and properly dispose of all waste. <br />j. A minimum of a two -celled system to recycle water from <br />the wash operation shall be utilized. <br />k. Water usage by mining activities shall not adversely <br />affect adjacent wells. Mitigative measures may include, <br />but are not limited to, curtailing of pumping activities <br />until water levels return. <br />(19) Signage <br />Signage for the operation shall be that which is permitted for an <br />industrial operation in a medium industrial zone, with the <br />exception that billboards are not allowed. <br />(20) Odor <br />Odor from the hot -mix operation must be controlled. The City <br />recognizes that from time to time odor emissions from the hot - <br />mix asphalt operation will occur, however, if weather conditions <br />make odor noticeable, the operator shall take measures to <br />reduce odor. If odor problems can not be resolved by the <br />Operator within 24 hours, the City reserves the right to take <br />appropriate measures to alleviate the problem, including <br />temporary cessation of operations. <br />(21) Fencing <br />The Operator shall fence the entire perimeter of the site with a <br />four (4) foot high fence with support post every ten (10) feet. <br />c:\users\dhuebner\appdata\local\microsoft\windows\temporary internet files\o1k87e4\gravcup-amend knife <br />river (2).doc <br />