1502 WALL ST IMAGINE CHILDRENS MUSEUM 2022-08-25

Construction Stormwater Best Management Practices (BMPs) (2.0) Describe the BMPs identified to control pollutants in stormwater discharges. Depending on the site, multiple BMPs for each element may be necessary. For each element identified: • Clearly describe the control measure(s). • Describe the implementation sequence. • Describe the inspection and maintenance procedures for that specific BMP. • Identify the responsible party for maintaining BMPs (if your SWPPP is shared by multiple operators, indicate the operator responsible for each BMP). Categorize each BMP under one of the following elements as listed below: 1. Preserve Vegetation / Mark Clearing Limits 2. Establish Construction Access 3. Control Flow Rates 4. Install Sediment Controls 5. Stabilize Soils 6. Protect Slopes 7. Protect Drain Inlets 8. Stabilize Channels and Outfalls 9. Control Pollutants 10. Control Dewatering 11. Maintain BMPs 12. Manage the Project 13. Protect Low Impact Development • BMPs must be consistent with the most current approved edition of the Stormwater Management Manual for Western Washington (SWMMWW) at sites west of the crest of the Cascade Mountains; the Stormwater Management Manual for Eastern Washington (SWMMEW) for sites east of the crest of the Cascade Mountains at the time the general permit was issued; or other Ecology-approved manual. • Note the location of each BMP on your Site Map in Appendix A. • Include the corresponding Ecology source control BMPs and runoff conveyance and treatment BMPs in Appendix B. o SWMMWW Volume II Chapter 4 Sections 4.1 and 4.2 — https://fortress.wa.govrecy/publications/SurnmaryPages/1410055.html or o SWMMEW Chapter 7 Section 7.3.1 and 7.3.2— https://fortress.wa.govLecy/publications/summarypages/0410076.html o If it can be justified that a particular element does not apply to the project site, include a written justification in lieu of the BMP description in the text for the appropriate element.