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Site preparation work shall be performed only during periods when beneficial <br /> results can be obtained. When drought, excessive moisture or other unsatisfactory <br /> conditions prevail, the work shall be stopped. <br /> 3.2 BEST MANAGEMENT PRACTICES (BMPS) <br /> Silt fences and straw bale dams shall be constructed to control erosion and <br /> migration of soils disturbed during construction. The fences and dams shall <br /> provide temporary protection and shall be removed only upon approval of the <br /> District. <br /> Machine sweeper operations shall occur daily when excavating or soils are <br /> exposed at the end of the shift at a minimum or more frequently as needed if <br /> sediment is observed being transported off site. <br /> All areas or drainage ways downstream of the construction site shall have Best <br /> Management Practices (BMPs) installed prior to the beginning of any clearing <br /> activities. Runoff from cleared or disturbed area shall be directed through the <br /> BMPs. Disturbed ground shall be stabilized at the end of each work day. <br /> Permanent soil stabilization and erosion and sedimentation control shall be <br /> implemented upon reaching finish grade. Slope protection shall be immediately <br /> implemented upon any soils showing signs of erosion. This shall be done in a <br /> manner approved by the District. <br /> All BMPs shall be inspected, maintained and kept in a condition sufficient to <br /> provide effective erosion and sedimentation control at all times. The site shall be <br /> inspected to ensure the BMPs are properly located, constructed and operating as <br /> designed during the first storm. Any necessary adjustments or repairs shall be <br /> made immediately and be approved by the District. The BMPs shall be inspected <br /> thereafter and after all significant storm events. Turbidity monitoring will be held <br /> on a weekly basis at a minimum, or more frequently if necessary as determined by <br /> the CESCL. <br /> All BMPs shall be removed no later than 30 consecutive calendar days after final <br /> site stabilization has been achieved as determined by the District. BMPs such as <br /> storm drain inlet protection, straw bales, silt fences and supports and plastic <br /> coverings shall be removed and properly disposed of offsite by the Contractor. <br /> Areas disturbed by removal of these BMPs shall be immediately stabilized in a <br /> manner approved by the District. <br /> END OF SECT City of Everett <br /> TT Reviewed for Permit 12/30/2021 <br /> AWWD Project W1609 Erosion Control <br /> Winter 2021 02370-4 <br />