6301 36TH AVE W 2016-11-01 - Laserfiche WebLink

• Any excavation materials must be placed in an upland area during construction. Wetland soils must be in separate piles from upland soils. After construction,wetland soils should be returned to the wetland and upland soils placed in upland areas. At a minimum,the top 18 inches of topsoils from wetland areas shall be stored separately from the rest of the soils and replaced as the top layer of fill in the wetlands following construction. Care must be taken not to mance"dams"from compacted fill that would alter any subsurface flow. • If a pipe is being trenched through the area,measures shall be taken to prevent the de-watering of the wetland(e.g.cut off collars,etc.). • When operating machinery in or near water,extreme care shall be taken to prevent any petroleum products, cement,chemicals,or other toxic or deleterious materials from entering the water. If a spill does occur, work shall be stopped immediately and Ecology's Spill Response Section contacted. • Equipment maintenance shall not occur in or adjacent to wetlands and streams. • After construction,the site must be returned to its original grades. Care must be taken to not drain wetlands or alter water flows or patterns. • Whenever feasible,if wetland plant species are not invasive,they should be removed prior to construction and placed aside in a shady damp location,such as under wet burlap sacks. Following construction,they should be replaced in the wetland area. • Revegetation: At a minimum,erosion control revegetation is required in all cleared areas and should include herbaceous ground cover that does not interfere with establishment of native vegetation. If long- term revegetation is required,it should be accomplished during the next most favorable time of year for the particular vegetation to ensure the highest level of success. (Note: If revegetation does not occur immediately following recontouring of the site,adequate erosion control measures must be taken.) Native species compatible with preconstruction vegetation patterns shall be used for revegetation. Degraded emergent sites,such as Reed canary grass fields,shall be replanted with species that are representative of a higher quality emergent,scrub-shrub or forested wetland. If revegetation is required,monitoring should occur once a year for a minimum of two years. (SEPA Water,Plant and Animal,and Land and Shoreline Use Policies) 2. Pre-construction conferences must be held with the Planning Department,Public Works Inspector and site development manager on sites containing environmentally sensitive areas in order to ensure that all development standards are understood.(SEPA Water,Plant and Animal,and Land and Shoreline Use Policies) 3. On sites where environmentally sensitive area and/or buffer mitigation is required, a report must be submitted by the wetland/stream/wildlife expert stating that the construction was completed per plans prior to issuance of occupancy permits.(SEPA Plant and Animal,Water,and Land and Shoreline Use Policies) 4. All mitigation plans shall include the provision of adequate topsoils in areas where plantings will occur.(SEPA Plant and Animal,Water,and Land and Shoreline Use Policies) 5. Temporary(2-year minimum)irrigation systems are required for all plantings in buffers,unless waived by the Planning Director. (SEPA Water,Plant and Animal and Land and Shoreline Use Policies) 6. In conjunction with issuance of development permits for a site,a permanent fence must be constructed along the entire edge of any environmentally sensitive area buffer. The design of the fence must be split rail,or an alternative approved by the Planning Department prior to issuance of permits. ESA signs should be placed at approximately 50 foot intervals along the fence. Signs are available from the Planning and Community Development Department. The City may require that environmentally sensitive areas be placed in separate tracts and designated as sensitive habitat with listed restrictions on the approval/final plans. (Chapter 37 of the Zoning Code and SEPA Water,Plant and Animal,and Land and Shoreline Use Policies) i- - 8 ��