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-10- <br /> <br />Hours - all mining operations shall be conducted between <br />6:30 a.m. and 8:00 p.m. on weekdays only unless <br />otherwise specifically approved by the City Engineer or <br />his agent. <br /> <br />Explosives - the use and handling of explosives shall be <br />coordinated with the City police department. Blasting <br />shall occur only at hours specified by the police <br />department and at no other time. <br /> <br />Dust - operators shall utilize all practical means to <br />reduce the amount of dust caused by the operation. In <br />no case shall the-amount of dust or other particulate <br />matter exceed the standards established by the Minnesota <br />Pollution Control Agency. No operations shall be <br />allowed wben wind gusts excees 30 MPH. <br /> <br />Water pollution - operators shall comply with all <br />applicable Minnesota Pollution Control Agency <br />regulations and Federal and Environmental Protection <br />Agency regulations for the protection of water quality. <br />No waste products or process residue, including <br />untreated wash water, shall be deposited in any lake, or <br />natural drainage system, except that lakes or ponds <br />wholly contained within the extraction site may be so <br />utilized. <br /> <br />Top soil preservation - all top soil shall be retained <br />at the site until complete rehabilitation of the site <br />has taken place according to the rehabilitation plan. <br /> <br />Designated haul routes shall be maintained by the <br />operator in accordance with Minnesota Department of <br />Transportation's Specification 2051.4 as found in the <br />Minnesota Department of Transportation Standard <br />S~ecifications~ for Cons~~~c~ion ]983 Edition. <br /> <br />170.071M(9) Dangerous Operations: <br /> <br />The operators shall change, alter or modify immediately any <br />excavation or operation therein deemed by the Council to be <br />unsanitary or dangerous or ool!uted or contrary 'to the <br />general health and welfare oz ~.e community. <br /> <br />170.07~M(]0) Designation of Haul Roads, Maintenance <br />of Haul ~oad$ and Traffic Law Compliance: <br /> <br />Maneria! of the kinds and for the purposes described herein <br />shall not be hauled from any source until the haul road from <br />that source has been officially designated as a haul road and <br />all materials hauled from the source shall be hauled over <br />that road. <br /> <br />The Operator shall select a haul road (or roads) over which <br /> <br /> <br />