1202 SHUKSAN WAY 2018-01-01 MF Import

Sites designated as geologically h<zazdous areas may be modified if approved by the Planning Director based upon review of a ;:e�technical report that shows the proposal meets the criteria of Section 37 of the Zoning Code. 1 he repoY�must show lhat the modifications will not create a hazard to the subject propeRy or su�rounding properties. The EIS does not evaluate the impacts of earth rcmoved from the Subazea and placed on sites oulside of the Subarea. Additional SEPA analysis will be required for placement of fill outside the Subazea. 3.3 Mitigation Measures Prior to Construction 1. Prior to issuance of grading permits for removing earth from a site, the applicant must demonstrate that permits have been obtained for placement of the earth off-site. (SEPA Earth and Water Policies) Durina Construction/Earthwork I. In order to minimize erosion du�ing construction, all soil piles shall be covered�vith plastic sheeting or other impervious covering staked to the gtcund or anchored with rocks or sandbags. Berms, earthen or othernise, must be constructed at the perimeter of excavated areas to prevent adjacent site runoff from entering thE excavations. (SEPA Earth and Water Policies) 2. Mining sites must comply with the Department of Natural Resources reclamation requirements. On sites with existing mined slopes which are not subject to DNR regulations, slopes must be remediated to 1.5 horizontal : 1 veRical (1.SH:1 V), except for glacial till slopes which can be remediated to 1H:1 V slope if approved by a qualified geotechnical engineer. All remediated slopes must be covered�vith top soil material that will support vegetation,jute matting or equivalent; and be revegetated with hydroseed,groundcover and shrubs. (SEPA Earth and Water Policies) 3. Temporary slopes�vithin 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 1 H:1 V. Temporary slopes must be covered with an impern:eable 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) t�u