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Page 7 (17) Mining activities shall not cause excessive vibration off site. If • excessive vibration becomes an issue, the City reserves the right to take appropriate measures to alleviate the problem. (18) Groundwater protection measures shall include: a. The Operator shall file with the City an emergency spill response plan. The operator shall adhere to this plan in the event there is a spill. b. The Operator shall provide the Fire Department with a copy of their flammable or hazardous materials. c. Fuel tanks shall be above ground, properly diked (if required by law), and registered with MPCA. d. All incidences that have the potential to adversely affect groundwater, including but not limited to spills, shall be verbally reported to the City within 24 hours. This verbal notification shall be followed up in writing within 4 working days. • e. A water appropriation permit form the Department of Natural Resources shall be obtained. f. The wells located at the Julius Nemeth residence, the scale house and the wash operation, shall be monitored once a year for diesel range organics (DRO). If mining is to occur below the water table, the above wells shall be monitored for DRO prior to excavation activities commencing and after cessation each year. Further, in the event of a spill, appropriate water tests will be taken until the spill is deemed clean. g. Groundwater levels shall be monitored in the wells located at the Julius Nemeth residence, the scale house, and the wash operation, prior to the start of wash operations and an additional 3 times during the first week of said operation to predict the long term effects of the pump operation. Thereafter, the aforementioned wells shall be tested a minimum of twice once per month, said frequency to be increased during dry periods. This routine testing shall also be done for the water recycling • pond. \\elkriver\sys\shrdoc\b&z\stever\gravcup.doc