7400 HARDESON RD 2018-01-02 MF Import

Note: If an endangered plant nr wildlife species is found on a site prior to or during development, the developer must comply with all applicable lederal, state, and local reg�zlations, including preparation of habitat ma�iageinent plans. (The Sul�area Plaz� preserves priority habitats as defined by the Department of Fish and Wildlife - urban n,ttur.�l open space, riparian corridors, and wetlands.) 4.3 Mitigation Measures 4.3.1 General Mitigation Measures The following Best Management Practices (BMPs) must be followed for all construction work through and immediately adjacent to enviroiunentally sensitive azeas and their buffers, unless othenvise required by a permit issued by a federal or state agency. •Work should be done in the dry season whenever possible (June 15 to September 15). • The width of the corridor through the wetland or stream should be minimized. Construction staging areas must be located outside of environmentally sensitive areas and their buffers, unless determined by the Planning Director to be infeasible. Streams, wetlands, buffers, staging azeas and construction limits shall be clearly shown on construction plans. Construction limits shall be clearly mazked in the field with orante construction fencing. • Work shall be done so as to minimize turbidity, erosion, and other water qua;ity impacts. Proper erosion and sediment control measures shall be followed to prevent sediments from entering creeks or wetlands. Erosion control measures shall be approved by the Department of Engineering and Public Services and/or agencies with jurisdiction. Measures may include, but not be limited to, placing plywood across the azea where equipment will operate; mulching the �vetland areas where equipment will operate; placing �vood chips atop a flexible mat to help prevent compaction (the wood chips and mat must be removed following construction); placing silt fences and hay bales between construction areas and all adjacent �vetlands and streams; and placing ecology blocks between construction azeas and streams ur wetlands when a temporary fill is used for roads, etc. • Erosion control measures shall be in place and inspected prior to commencement of work. All erosion control structures shall be inspected regularly to ensure they aze maintained in working ordcr. If the corridor needs to be de�vatcred to do the work, the water should be pumped to a sedimentation pond wliere all solids can settle or an area where it can sheet flow before being discharged back to the stream or �vetland. Turbidity levels in associated wetlands and streams shall not exceed the standards in WAC 173-201A.