[...]... for concrete washout areas on-site, designate specific washout areas and design facilities to handle anticipated washout water Washout areas should also be provided for paint and stucco operations Because washout areas can be a source of pollutants from leaks or spills, Developing Your Stormwater Pollution Prevention Plan: A Guide for Construction Sites 25 EPA recommends that you locate them at least... are either temporarily or permanently ceased in an area • Date(s) when an area is either temporarily or permanently stabilized • Ensure that construction support activities, including borrow areas, waste areas, contractor work areas, and material storage areas and dedicated concrete and asphalt batch plants are cleaned and maintained • Replace damaged BMPs, such as silt fences, that no longer operate... features at the site related to construction activities and stormwater management practices Developing Your Stormwater Pollution Prevention Plan: A Guide for Construction Sites 15 the SWPPP, as well as post -construction stormwater BMPs • Areas of stabilization Identify locations where stabilization practices are expected to occur Mark areas where final stabilization has been accomplished • Other areas and... control measures are not stabilization measures Final Stabilization Once construction activity in an area is completed and the area is stabilized (typically by achieving 70 percent permanent vegetative cover), you can mark this area on your SWPPP and discontinue inspections in that area By bringing areas of your site to final stabilization, you can reduce your workload associated with maintaining and inspecting... subject to additional requirements to protect these waterbodies Wetland areas, including bogs, marshes, swamps, and prairie potholes may be found in areas adjacent to rivers, lakes, and coastal waters but may also be found in isolated places far from other surface waters Many types of wetlands are protected under the Clean Water Act and construction activities in and around these areas may require an additional... (www epa.gov/waters/enviromapper) or contact your state environmental agency for more information Assess Whether You Have Historic Sites that Require Protection Assess Whether You Have Endangered Plant or Animal Species in Your Area The federal Endangered Species Act protects endangered and threatened species and their critical habitat areas (States and tribes may have their own endangered species laws.)... Place all hazardous and toxic material wastes in secondary containment  Hazardous waste containers should be inspected to ensure that all containers are labeled properly and that no leaks are present P2 Principle 2: Establish proper building material handling and staging areas Your SWPPP should include comprehensive handling and management procedures for building materials, especially those that are... state or EPA develops a plan for correcting the situation This plan is called a Total Maximum Daily Load (TMDL) If stormwater from your project could reach an impaired water with or without an approved TMDL (either directly or indirectly through a municipal storm drain system), your permit Developing Your Stormwater Pollution Prevention Plan: A Guide for Construction Sites may include additional requirements... enters a public road Figure 14 Illustration of a stabilized construction exit Dewatering practices are used to remove ground water or accumulated rain water from excavated areas Pump muddy water from these areas to a temporary or permanent sedimentation basin or to an area completely enclosed by silt fence in a flat vegetated area where discharges can infiltrate into the ground 22 Developing Your Stormwater. .. Plan Construction sites may be subject to 40 CFR Part 112 regulations that require the preparation and implementation of a SPCC Plan to prevent oil spills from aboveground and underground storage tanks Your facility is subject to this rule if you are a nontransportation-related facility that: • Has a total storage capacity greater than 1,320 gallons or a completely buried storage capacity greater than . Your Stormwater Pollution Prevention Plan: A Guide for Construction Sites B. What Is Stormwater Runoff and What Are Its Impacts? Stormwater runoff is rain. containers for waste and garbage at your site. Store hazardous materials and chemicals so that they are not exposed to stormwater. • Minimize the area and