1515 132ND ST SE 2022-01-20 - Laserfiche WebLink

Element #6: Protect Slopes There are no slopes associated with the project. Element #7: Protect Drain Inlets It is important to protect storm conveyance and mitigation systems from any sediment - laden runoff. Both existing and constructed catch basins and other inlets shall be protected per the Storm Drainage Inlet Protection BMP (BMP C220). See the TESC Plan in Appendix `B'. Element #8: Stabilize Channels and Outlets There are no channels or outlets associated with the project. Element #9: Control Pollutants All pollutants, including waste materials and demolition debris, that occur on -site during construction shall be handled and disposed of in a manner that does not cause contamination of surface water. Woody debris may be chopped and spread on site. Cover, containment, and protection from vandalism shall be provided for all chemicals, liquid products, petroleum products, and non -inert wastes present on the site (see Chapter 173-304 WAC for the definition of inert waste). Maintenance and repair of heavy equipment and vehicles involving oil changes, hydraulic system drain down, solvent and de -greasing cleaning operations, fuel tank drain down and removal, and other activities which may result in discharge or spillage of pollutants to the ground or into surface water runoff must be conducted using spill prevention measures, such as drip pans. Contaminated surfaces shall be cleaned immediately following any discharge or spill incident. Emergency repairs may be performed on -site using temporary plastic placed beneath and, if raining, over the vehicle. Application of agricultural chemicals including fertilizers and pesticides shall be conducted in a manner and at application rates that will not result in loss of chemical to surface water runoff. Manufacturers' recommendations for application rates and procedures shall be followed. All applicable BMPs shall be used to prevent or treat contamination of surface water runoff by pH modifying sources. These sources include bulk cement, cement kiln dust, fly ash, new concrete washing and curing waters, waste streams generated from concrete grinding and sawing, exposed aggregate processes, and concrete pumping and mixer washout waters. Some applicable BMPs include Concrete Handling (BMP C151).