3214 BROADWAY BROADWAY KINECT APARTMENTS 2021-08-11

• ' • • • ELEMENT#9—CONTROL POLLUTANTS • All pollutants, including waste materials and demolition of debris,that are generated or brought on-site • during construction activities shall be handled and disposed of in a manner that does not cause • contamination of stormwater. Maintenance and repair of heavy equipment and vehicles involving oil • changes, hydraulic system drawdown, solvent and degreasing cleaning operations,fuel tank drawdown and removal, and other activities which may result in discharge or spillage of pollutants to the ground or • into stormwater runoff must be conducted using spill prevention measures. 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(s)to stormwater runoff. Manufacturers' • recommendations shall be followed for application rates and procedures.The following Source Control • BMPs will be prepared/implemented by the Contractor for this project. • • BMP C151: Concrete Handling • • BMP C152: Sawcutting and Surfacing Pollution Prevention • • BMP C153: Material Delivery,Storage and Containment • • BMP C154: Concrete Washout Area • Maintenance of storm drainage facilities • • Street sweeping at an interval that's prescribed by the Engineer • ELEMENT#10—CONTROL DEWATERING • • All foundation,vault, and trench dewatering activities shall be routed to a sediment pond for basic • filtering/treatment. Clean, non-turbid dewatered water, as determined by the Certified Professional in • Erosion and Sediment Control, can be discharged to systems tributary to state surface waters, provided the dewatering flow does not cause erosion or flooding to receiving waters. • • Highly turbid or otherwise contaminated dewatered water that's from construction equipment operation, clamshell digging, concrete tremie pour, or work inside a cofferdam, shall be handled separately from stormwater at the site. Some disposal options, depending on site constraints, may • include: • • Transport off-site in a vehicle, such as a vacuum flush truck,for legal disposal in a manner that does • not pollute State waters • • Ecology-approved on-site chemical treatment or other suitable treatment technologies • 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.All maintenance and repairs shall • be completed in accordance with the practices, procedures, and materials for each respective BMP. • Sediment Control BMPs shall be inspected weekly or after a runoff-producing storm event during the • dry season and daily during the wet season. • • Broadway Apartments 6 of 9 Construction SWPPP • • •