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encompassed 2,865 surrounding the 30.6 acres of the proposed project, reviewed cumulative impacts for <br />potential environmental effects of mineral extraction relative to noise, air quality, traffic, dust, surface <br />and ground water quality, and disruption of native flora and fauna as well as cumulative impacts related <br />to social and economic issues. The City, as the responsible governmental unit (RGU) for performing the <br />review, concluded that any negative effects could be regulated within the framework of the Conditional <br />Use Permit (CUP) issued for each individual mining operation. The CUP for Plaisted's existing facility <br />includes conditions which address and satisfactorily regulate potential environmental impacts associated <br />with noise, dust, surface and groundwater protection, and site restoration. <br />30. Other potential environmental impacts. If the project may cause any adverse environmental impacts <br />not addressed by items 1 to 28, identify and discuss them here, along v,Tith any proposed mitigation. <br />None. <br />31. Summary of issues. Do not complete this section if the EAi~ is being done for EIS scoping; instead, <br />address relevmzt issues in the draft Scoping Decision document, which must accompany the EAW. <br />List any impacts and issues identified above that may require further investigation before the project is <br />begun. Discuss any alternatives or mitigative measures that have been or maybe considered for these <br />impacts and issues, including those that have been or maybe ordered as permit conditions. <br />Runoff'. Runoff from the proposed mining area will be controlled and contained on site through the <br />implementation of Best Management Practices as outlined in the site's Stormwater Pollution Prevention <br />Plan. Untreated stormwater contacting exposed soils will not be discharged off site. These practices <br />include silt fence, stormwater diversion berms, establishment of vegetation, temporary sedimentation <br />basins and infiltration areas and vegetation of reclaimed areas. <br />Noise: Noise is produced from the mining and processing equipment. The mining operation is subject to <br />setbacks from properly boundaries. Operations will be conducted within established noise standards. <br />Dust: Dust emissions are predominantly due to vehicular travel on internal unpaved haul roads. <br />Conveyors will be used to transport the excavated material to the operations area for additional <br />processing, minimizing truck travel in the mining operation. The main processing and stockpiling area <br />is hard surfaced and a water truck is maintained on-site and used for frequent watering of internal haul <br />roads throughout the mining period. The hard surface areas are swept routinely to reduce dust <br />generation. <br />Erosion/Sediment Control: Erosion during the initial stripping operations may generate runoff with high <br />sediment loads. Appropriate best management practices which may include diversions berms and silt <br />fence will be employed on a temporary basis as needed. <br />10 <br />