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in a location that cannot be viewed from adjacent properties or is totally <br />screened. <br />(16) Vibration <br />Muting activities shall not cause excessive vibration off site. If excessive <br />vibration becomes an issue, the City reserves the right to take appropriate <br />measures to alleviate the problem. <br />(17) Groundwater Protection Measures <br />a. The Operator shall file with the City an Environmental Spill Plan and <br />a Storm Water Pollution Prevention Plan. The Operator shall adhere <br />to these plans in the event there is a spill. <br />b. The Operator shall provide the Fire Department with a copy of their <br />flammable or hazardous materials. <br />c. Refueling shall take place only at designated locations. <br />d. All incidences that have the potential to adversely affect groundwater, <br />including but not limited to spills, shall be verbally reported to the <br />City within 24 hours. This verbal notification shall be followed up in <br />writing within four (4) working days. <br />e. The appropriate storm water permits (NPDES) shall be obtained by <br />the Operator from MPCA and copied to the City. <br />£ Prior to commencing mining, the monitoring well located at the site <br />shall be monitored for diesel range organics (DRO), pH, temperature <br />and conductivity to establish baseline data. The reference parameters <br />shall be monitored a minimum of once each mining season <br />thereafter. In the event of a spill, the City may require additional <br />testing events, parameters and monitoring wells, as well as the <br />cessation of operations until the spill is deemed clean by the City. <br />g. Gravel washing operations and dewatering are prohibited at this site <br />and will require an amendment to this permit to be allowed in the <br />future. <br />h. Except for minor repairs, maintenance of vehicles and equipment <br />shall take place in the shop at the Elk River Bituminous site. The <br />Operator shall have an approved hazardous waste license for this <br />facility and properly dispose of all waste. <br />Rip Rap and a vegetative buffer to remove nutrients shall be <br />established on the outlet end of the ditch on the site. <br />Page 5 <br />