Laserfiche WebLink
1.0 MITIGATION <br /> The methods for mitigation of the negative impects would be the same for both the No Action <br /> Aiternative and the ProDosed Action. These measures would inciude the foltowiag: <br /> 4.1 Excavetions <br /> • Site disturbance shoutd be limited by using tracked equipment, where possible, within the <br /> excavation areas. <br /> • Stending surface water should be removed from the excavation areas. <br /> • Surface erosion control meuures ahould be used in areas in which surface water is <br /> anticipated to drain from the excavetion ares. The control measures ahould be designed by a <br /> professional civii or geotechnical englneer, or geoiogist, to prevent off-site siltation of surface <br /> dreinages. Methods may inciude, but are not limited to the �se of siit fences and/or�ettiement <br /> ponds. <br /> • Temporary slopes within native glaciel soils shouid be limited to a maximum angle oC 1 foot <br /> horizontal (H) to 1 foot verticel (V). Temporary slopes within fili soils ahould be limited to 0 <br /> meximum angle oC 1-1/2H:lV. Temporery siopcs ahould be covered with an impermeable <br /> membrane, such es visqueen, in order to prevent precipitation from coming in contact with the <br /> soils. <br /> • Permanent siopes steeper then 25 percent should be designed by a professional civil or <br /> geotechnical engineer, or geologist. The design should present appropriate erosion control <br /> measures which may include, but are not limited to: hydroseeding, erosion control blankets, rip- <br /> rap, and visqueen. � <br /> •Soils which become disturbed,end which are above their optimum moisture content,should <br /> either be allowed to dry to within their optimum moisture concent and be recompacted, or be <br /> romoved from the conctruction site. <br /> • All eerthwork should be performed under the direct observation oC a professional civil or <br /> geotechnical engineer, or geologist. <br /> 4.2 Fill Placement <br /> 7'he same mitigation techniques and methodologies presented in the Exc�vations section apply to <br /> fill placement of the on-site, moisture-sensitive soils. <br /> 4.3 Site Sloped Areas • <br /> • Building structures,utilities,and roadways shauld not be constructed on slopes greater than <br /> 40 percent. <br /> 4 <br />