Uncontrolled stormwater runoff from construction sites can significantly impact water quality within Madera County. As stormwater flows over a construction site, it can pick up pollutants like sediment, trash, and chemicals and transport them to storm drains or directly into streams and rivers. In an attempt to limit the amount of construction generated pollutants from entering local waters, the County of Madera is working with contractors to ensure the implementation of Best Management Practices (BMPs) at all construction sites. Best Management Practices are structural and/or behavioral tools that can be used to prevent pollutants from being mobilized in stormwater. A typical list of construction site BMPs include:
- Conduct daily site inspections and clean areas as necessary.
- Develop spill response and containment procedures. Keep kits stocked and ready.
- Develop an erosion control plan for wind and rain to prevent pollution from leaving the construction site.
- Do not allow concrete, paints, chemicals, sediment, yard debris, etc. to enter the storm drain system (curb, gutter, sidewalk, street, drain, or inlet). Store these products out of the rain so they will stay dry.
- Properly dispose of all materials. Do not dump unused or waste products on the ground, where water can carry them to the storm drain.
- Establish and use an adequately sized concrete washout area to contain all liquids on site.
For additional information regarding BMP selection, installation, implementation, and maintenance, please visit the California Stormwater Quality Association website (CASQA.org) or follow the links below to a specific CASQA BMP Handbook:
- Construction BMP Handbook
- Industrial & Commercial BMP Handbook
- Municipal BMP Handbook
- New Development & Redevelopment BMP Handbook
In addition, the County of Madera has purchased a construction site BMP training video, “Ground Control, Stormwater Pollution Prevention for Construction Sites”. The training video focuses on the most widely used construction site BMPs, and discusses how pollutants can be control at construction sites. Please contact the Madera County Public Works Department at (559) 675-7811 or at email@example.com to schedule a viewing of this video.