1527 FLORIDA DR 2022-04-15 - Laserfiche WebLink

t s SWPPP NARRATIVE 6/13/2019 PAUL BUSTARD SHOR PLAT LOT 2 'AGE 4 OF 6 • All pollutants, including waste materials and demolition debris, that occur on-site shall be handled and disposed of in a manner that does not cause contamination of stormwater. • 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). On-site fueling tanks shall include secondary containment. • 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 stormwater 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 stormwater runoff. Manufacturers' recommendations for application rates and procedures shall be followed. • BMPs shall be used to prevent or treat contamination of stormwater runoff by pH modifying sources. These sources include, but are not limited to, 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. Stormwater discharges shall not cause or contribute to a violation of the water quality standard for pH in the receiving water. Element#10: Control De-Watering No dewatering is expected as no excavation to the water table is anticipated. Element#11: Maintain BMP's Notes for the maintenance of erosion control facilities are included on the construction plans. Materials will be stockpiled on site offsite in the event of a BMP failure or unforeseen circumstances to the TESC conditions of the site per BMP C150 Materials on Hand. Element#12: Manage the Project The project will be subject to seasonal work limitations (BMP C162), site inspection and monitoring as required by the City of Everett. Erosion control monitoring and supervision will be managed by the contractor. Element#13: Protect Low Impact Development(LID) BMP's The road has been paved prior to building construction, so further protection will be needed. The road is a LID BMP, which uses a porous mix of asphalt (concrete for the driveways)to allow stormwater runoff to percolate and infiltrate through the underlying media. To prevent excess sediment from clogging the porous surface during construction, a fabric covering should be used for the entire surface of the access road and additionally on all of the porous driveways if they have been constructed as well. The fabric should allow water to pass through but prevent sediment from passing. The fabric will need to be approved by the City of Everett prior to use, and be replaced as necessary as it becomes worn and damaged from traffic. The contractor is ultimately responsible for protecting the LID BMPs for the duration of construction activities. C:\Users\darianc\Desktop\CE\DOCS\Bustard SWPPP Lot 2.docx