2018-03-14_PERMIT FILE - M2018011

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Potential pollutant sources, including materials and activities at the site were evaluated for the potential to contribute pollutants to stormwater discharges. That evaluation resulted in the following identified potential pollutant sources: • Areas of soil disturbance • Vehicle tracking of soil • Equipment maintenance and fueling. Expanding upon the results of that evaluation: Areas of soil disturbance—The salvaged topsoil will be placed in a compacted berm around the area to be excavated. With this technique: • all runoff from the disturbed area will be contained and will seep into the sandy soil and not be discharged • all surface runoff from adjoining areas will be diverted around the disturbed area and thus will not be contaminated. The perimeter berm will be constructed and maintained as detailed in BMP EC-8 found in the appendices. Vehicle trackingof f soil—The borrow excavation will require the construction of an on-site haul road to connect the excavation site to the existing on-site roads. The distance traveled on the existing roads from the connection with the new road to the present exit onto County Road 66 and the high quality of the existing road at the exit makes it highly unlikely that soil will be tracked onto the public highway. However, the situation will be monitored during the hauling activities and if soil tracking is observed a Stabilized Entrance will be constructed and maintained as detailed in BMP SC- 8 found in the Appendices. Equipment maintenance and fueling—No fuel or petroleum products will be stored at the excavation site and the hauling units will be maintained and fueled at the off-site main project area. The excavation equipment will be fueled and serviced at the excavation site. Pollution prevention procedures to be followed during fueling and servicing activities are covered in the Spill Prevention Control and Countermeasures (SPCC)Plan found in the Appendices.