Ordinance 2213-97 - Laserfiche WebLink

8. Temporary slopes within native glacial soils shall be limited to a maximum angle of 1/2 foot horizontal (H) to 1 foot vertical (V). Temporary slopes within fill soils shall be limited to a maximum angle of 1H:1V. Temporary slopes must be covered with an impermeable membrane, such as visqueen or mulch, in order to prevent precipitation from coming in contact with the soils. (SEPA Earth and Water Policies) Permanent slopes steeper than 25% shall be designed by a professional civil or geotechnical engineer. The design should present appropriate erosion control measures which may include: hydroseeding, erosion control blankets, rip-rap,jute matting, and visqueen. (SEPA Earth and Water Policies) 9. Grading/filling must not adversely affect the hydrology of streams and existing or created wetlands. (SEPA Earth and Water Policies) 10. Grading/filling on-site shall not adversely affect adjoining sites. (SEPA Earth and Water Policies) 11. Clearing limits shall be staked, flagged, and/or fenced off prior to initiation of any clearing or land alteration activities as approved by the Engineering and Public Services Inspector. Where the clearing limit is the edge of a geologically hazardous area or its buffer, the clearing limit shall be fenced during construction with a chain link or solid wooden fence a minimum of 4 feet high. Following completion of construction and prior to issuance of occupancy permits, a permanent fence must be provided along the edge of the buffer. The fence must be split rail or an alternative design approved by the Planning Director. Environmentally sensitive areas signs must be posted on the fence. (SEPA Earth and Water Policies) 11. Removal of native vegetation within the building setback and buffer areas must be avoided when possible. (SEPA Earth and Water Policies) 12. Project proponents should try to retain topsoil on sites to the maximum extent feasible. (SEPA Earth and Water Policies) Section 4: SURFACE/GROUNDWATER, PLANTS AND ANIMALS 4.1 Threshold If a priority species is mapped on or within 300 feet of a site or documented on the site by a qualified individual, additional SEPA review may be required. This will require coordination with the Department of Fish and Wildlife to determine appropriate mitigation measures. These may include, but are not limited to, seasonal restriction on construction, provision of buffers, and preservation of existing vegetation. Note: If an endangered plant or wildlife species is found on a site prior to or during development, the developer must comply with all applicable federal, state, and local regulations, including preparation of 16