10105 1ST DR SE 2021-12-14 - Laserfiche WebLink

• AE CONSTRUCTION SFR Minimum Requirement # 2: SWPPP Narrative Element #1: Mark Clearing Limits Clearing limits have been shown on the Temporary Erosion and Sedimentation Control Plans. Element #2: Establish Construction Entrance It has been shown that the current driveway entrance will be used as a temporary construction entrance. All vehicles shall be free of debris prior to leaving the site. Element # 3: Control Flow Rates Flow rates during construction are to be contained through the installation of silt fencing along the eastern clearing limits. Element # 4: Install Sediment Controls Sediment controls mainly consist of installing silt fencing along the eastern clearing limits. Element # 5: Stabilize Soils All soils disturbed during site grading will be stabilized by use of the most appropriate BMP method available. These consist of short-term and long-term solutions. Short-term methods consist of compaction of the soils by vibratory roller or bulldozer. Long-term methods consist of straw covering over the soils (this is in the case of the project becoming dormant for greater than 1 month). At this time no wintertime grading or construction activities will occur. During construction periods longer than 1 working week (7 days) where the soils are exposed and un-worked will use the proscribed methods in the Storm Water Management Manual for Western Washington to reduce sedimentation transported offsite. If winter grading is conducted, all exposed soils shall be covered within 2 days. Element # 6: Protect Slopes No steep slopes exist on the proposed site; therefore, slope protection is not needed. Element # 7: Protect Drain Inlets No known downstream inlets exist in the immediate downstream vicinity; inlet protection is not required. Element # 8: Stabilize Channels and Outlets The need for channel stabilization is not expected but, existing channels or drainage outlets located within 500-feet of the property of the property should be routinely inspected for debris that may dam and/or aid erosion. WESTERN ENGINEERS, INC. 14 PROJECT: 19-1821-A