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Page 6 <br /> d. All incidences that have the potential to adversely affect <br /> groundwater, including but not limited to spills, shall be <br /> verbally reported to the City within 24 hours. This verbal <br /> notification shall be followed up in writing within four (4) <br /> working days. <br /> e. The appropriate storm water permits (NPDES) shall be <br /> obtained by the Operator from MPCA and copied to the <br /> City. <br /> f. 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 /> g. 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 /> h. A minimum of a two-celled system to recycle water from <br /> the wash operation shall be utilized. <br /> i. Each year, groundwater levels shall be monitored at the <br /> well located west of the plant site. A drop in water level of <br /> twelve (12) inches or more shall be immediately reported <br /> to the city. <br /> j. 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 /> (18) 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 /> C\Users\dhuebner\AppData\Local\Microsoft\WXindows\Temporary Internet <br /> File \Content Outlook\Q7RBTRKC\GRAVCUP.docS:\PLANNIN( \Case Filet:V?.00613\CUP\(:U 06 0313 09 Aggre};atc <br /> Indu.,tries\G RA VCUP.DOC <br />