What must a locality's ordinance require for submission and approval?

• A. ESC plan only
• B. ESC plan and SWM plan
• C. No plan required
• D. SWM plan only

Answer: (B)

Local ordinances require submission and approval of both an erosion and sediment control plan and a stormwater management plan. The ESC plan focuses on construction-phase measures to keep soil from washing off the site, using controls like silt fences, stabilized entrances, sediment basins, and timely stabilization. The SWM plan addresses post-construction runoff, detailing how the site will manage and treat stormwater over the long term to meet water quality and quantity goals. Requiring both plans ensures the project controls erosion during construction and manages the resulting runoff after construction is finished, in line with state and local requirements.