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clearing limit is the edge of a geologically hazardous area or its buffer, the clearing limit shall be <br /> fenced during construction with a chain link or solid wooden fence a minimum of 4 feet high. <br /> 9. Removal of native vegetation within the building setback and buffer areas must be avoided when <br /> possible. <br /> 10.Project proponents should try to retain topsoil on sites to the maximum extent feasible. <br /> Section 4: SURFACE/GROUNDWATER, PLANTS AND ANIMALS <br /> 1. All mitigation plans shall include the provision of adequate topsoils in areas where plantings will <br /> occur. <br /> 2. Temporary(2-year minimum) irrigation systems are required for all plantings in buffers, unless waived <br /> by the Planning Director. (SEPA Water, Plant and Animal and Land and Shoreline Use Policies) <br /> 3. Wildlife Corridors Because the area is generally built out, few opportunities exist to establish east- <br /> west wildlife corridors between basins in the residential areas to the north of the Subarea. Thus the <br /> remaining corridors are important for wildlife movement. Several wildlife corridors were required on <br /> the Boeing property. In addition, the City owns a parcel between Narbeck Creek and Merrill and Ring <br /> Creek that will function as a wildlife corridor. <br /> The City shall designate the buffers between industrial developments and the residential areas and <br /> buffers separating residential areas (see Figure 3.4-40 in the EIS) as wildlife corridors as well as <br /> buffers. Additional plantings shall be required in these corridors/buffers in conjunction with issuance <br /> of permits on these sites when the Planning Director determines that the corridor can be enhanced. <br /> An enhancement plan must be reviewed and approved by the Planning Department prior to the <br /> issuance of any permits. The City encourages enhancement in all corridors. Enhancement should <br /> provide additional cover and food sources for wildlife, as well as coniferous vegetation. (SEPA Plant <br /> and Animal and Land and Shoreline Use Policies) <br /> 4. No removal of vegetation is permitted in environmentally sensitive areas and their buffers, including <br /> wildlife corridors, except as approved by the Planning Director to eliminate hazardous trees, allow <br /> construction and maintenance of utilities, and/or provide access to properties. Any cleared areas <br /> shall be replanted with native vegetation. In wildlife corridors, the intent of plantings shall be to <br /> establish coniferous forest where feasible, except that utility corridors shall be established with native <br /> shrubs and groundcover. <br /> 5. Where development occurs adjacent to environmentally sensitive areas, an analysis of hazardous <br /> trees in the environmentally sensitive area must be completed by a professional arborist. Any trees <br /> that are hazardous (i.e., are diseased, damaged or leaning and are likely to fall on development) must <br /> be removed prior to issuance of occupancy permits, and preferably, prior to construction of structures <br /> on the site. Where they would not create a hazard, the trunks of these trees must be left for snags. <br /> For each tree cut, three coniferous trees must be planted unless the Planning Director determines <br /> that sufficient natural coniferous revegetation is occurring in the area. However, for each tree left as <br /> a snag, one coniferous tree must be planted. The arborist must submit a tree removal and <br /> replacement plan to the Planning Department and mark in the field all trees to be removed. The <br /> Planning Department must approve the tree removal and replacement plan prior to any activity in the <br /> environmentally sensitive area. Large woody debris should be retained where it would not create a <br /> hazard, such as causing flooding due to alteration of the natural hydrology of a stream system. <br /> 6. A variety of native species can be planted to increase local diversity and provide attractive wildlife <br /> habitat while countering erosion. The use of native plants can also improve water quality by <br /> minimizing the use of fertilizers, herbicides, and pesticides. Water use efficiency is another <br /> advantage of landscaping with native plants. Reduced irrig tion means reduced likelihood of erosion, <br /> / /� <br />