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A number of structural controls (mulching, use of inlet protection, or silt fence) and non-structural controls (minimizing disturbance, good housekeeping) have been shown to be efficient, cost effective, and versatile for small construction site operators to implement. The 2022 CGP provides permit coverage to eligible construction stormwater discharges in the following areas where EPA is the NPDES permitting authority: Massachusetts, New Hampshire, New Mexico, and the District of Columbia American Samoa, Guam, Johnston Atoll, Midway and Wake Islands, Northern Mariana Islands, and Puerto Rico If your smaller project is part of a larger common plan of development or sale that collectively will disturb one or more acres (e.g., you are building on 6 half-acre residential lots in a 10-acre development or are putting in a fast food restaurant on a 3/4-acre pad that is part of a 20-acre retail center) then you need permit coverage. 3. EPA recognizes that operators on small residential lots (i.e., lots being developed for residential purposes that will disturb less than one acre of land, but are part of a larger residential project that will ultimately disturb greater than or equal to one acre) that are constructing within the 50-foot buffer area may, due to limited technical resources, have difficulty determining the necessary supplemental erosion and sediment controls to provide the equivalent sediment removal function of a 50-foot buffer. Waivers are not available for any construction activity disturbing 5 or more acres, or less than 5 acres if part of a common plan of development or sale that will ultimately disturb 5 or more acres (or if designated for permit coverage by EPA). The buffer requirements also apply to areas in the 50-foot buffer where natural vegetation is limited or nonexistent (e.g., rocky or sandy areas) and that are otherwise not occupied by preexisting development disturbances. 0000010088 00000 n If at any point during the course of the project, total land disturbance at any one time exceeds 5 acres, the deadline to complete stabilization for this portion of the project is within 7 calendar days of initiating stabilization. Operators that plan to use cationic treatment chemicals are only eligible for coverage under the CGP if site-specific EPA authorization is provided; otherwise, an individual permit is required in order to use such chemicals associated with a discharge of pollutants to waters of the United States. Also requiring a permit are construction activities disturbing final stabilization of all disturbed areas and filed a Notice of Termination, must gain coverage under GP-02-01 by filing a new NOI with the Department. Ditch Bank Stabilization Techniques Therefore, operators have the flexibility to disturb more land when necessary, but are required to stabilize faster because more land is unprotected and vulnerable to erosion and sediment transport during storm events. Contact your permitting authority if additional clarity is needed. National Pollutant Discharge Elimination System (NPDES), About EPAs NPDES Construction Stormwater Permitting Program, Activities Requiring Coverage Under the 2017EPA CGP, Obtaining CGP Authorization and Terminating Coverage, Construction and Development Effluent Limitations Guideline and New Source Performance Standards, Erosion and Sediment Control Requirements in the 2017 EPACGP, Oil and Gas Stormwater Permitting webpage, High Plains Regional Climate Center climate mapping tool, New Mexico State University New Mexico Climate Center drought classifications, National Oceanic and Atmospheric Administrations U.S. RESIDENTIAL
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land stabilization coverage