5109 SEAHURST AVE 2025-12-12 - Laserfiche WebLink

5. This SWPPP was prepared using the Ecology SWPPP Template. This SWPPP was prepared based on the requirements set forth in the Constriction Stormwater General Permit and in the Stormwater Management Manual for Western Washington(SWMMWW 2014). The 13 BMP Elements Element#1 —Mark Clearin2 Limits To protect adjacent properties and to reduce the area of soil exposed to construction, the limits of construction will be clearly marked before land- disturbing activities begin. Element#2—Establish Construction Access Construction access or activities occurring on unpaved areas shall be minimized, yet where necessary, access points shall be stabilized to minimize the tracking of sediment onto public roads, and wheel washing, street sweeping, and street cleaning shall be employed to prevent sediment from entering state waters. Install the temporary construction entrance, according to the approved construction plans,prior to any clearing or grading activities. Maintain until the access road is paved. Element#3--Control Flow Rates In order to protect the properties and waterways downstream of the project site, stormwater discharges from the site will be controlled. In general, discharge rates of stormwater from the site will be controlled where increases in impervious area or soil compaction during construction could lead to downstream erosion, or where necessary to meet local agency stormwater discharge requirements. Element#4—Install Sediment Controls Install silt fencing, according to the approved plans, prior to any clearing or grading activities. Maintain until all construction activities are completed. Install catch basin filters, according to the approved construction plans, as catch basins become operable. Maintain until all construction activities are completed. Element#5—Stabilize Soils Insight Engineering Co. -Stormwater Site Plan 07/24/19 - 14-