Construction site operators (generally, the person who has operational control over construction plans and/or the person who has day-to-day supervision and control of activities occurring at the construction site). Construction sites required to comply with stormwater discharge requirements. Stormwater runoff from construction sites can cause significant harm to our rivers, lakes, and coastal waters. A SWPPP is required (by your construction general permit) and will help you prevent stormwater pollution.A SWPPP is more than just a sediment and erosion control plan. It describes all the construction site operator’s activities to prevent stormwater contamination, control sedimentation and erosion, and comply with the requirements of the Clean Water Act.