8517 7TH AVE SE 2022-03-02 - Laserfiche WebLink

SMM Garden Everett December 5, 2019 Marginal slope areas disturbed during construction must be revegetated at the end of construction with appropriate plantings to limit future potential erosion. Element#7- Protect Drain Inlets It does not appear that this will be necessary for this project. Contractor to determine applicability. • BMP C220: Storm Drain Inlet Protection Element#8-Stabilize Channels and Outlets Due to flat nature of the area of construction it is not anticipated that any flows of significant velocity will leave the site or cause any negative impact to downstream channels or water courses. Element#9-Control Pollutants All pollutants, including waste materials and demolition debris, that occur onsite shall be handled and disposed of in a manner that does not cause contamination of stormwater. Good housekeeping and preventative measures will be taken to ensure that the site will be kept clean, well-organized, and free of debris. • BMP C 153-Material Storage, Delivery, and Containment Element#10-Control Dewatering No de-watering is anticipated for this project. Element#11- Maintain BMPs All temporary and permanent erosion and sediment control BMPs shall be maintained and repaired as needed to assure continued performance of their intended function. Maintenance and repair shall be conducted in accordance with each particular BMP's specifications. Visual monitoring of the BMPs will be conducted at least once every calendar week and within 24 hours of any rainfall event that causes a discharge from the site. If the site becomes inactive, and is temporarily stabilized,the inspection frequency will be reduced to once every month. All temporary erosion and sediment control BMPs shall be removed within 30 days after the final site stabilization is achieved or after the temporary BMPs are no longer needed.Trapped sediment shall be removed or stabilized on site. Disturbed soil resulting from removal of BMPs or vegetation shall be permanently stabilized. All temporary and permanent erosion and sediment control BMPs shall be maintained and repaired as needed by Contractor. Element#12- Manage the Project Erosion and sediment control BMPs for this project have been designed based on the following principles: • Design the project to fit the existing topography, soils, and drainage patterns. • Emphasize erosion control rather than sediment control. • Minimize the extent and duration of the area exposed.