BMP: Best Management Practices
CGP: Construction General Permit
EC: Environmental Control
NPDES: National Pollutant Discharge Elimination System
SWPPP: StormWater Pollution Prevention Plan
Tier 2: Listed as “High Quality Waters”, and all wetlands that are not designated as an Outstanding Resource Water. (https://www.epa.gov/system/files/documents/2022-01/2022-cgp_tier-3-tier-2-and-tier-2.5-waters.pdf)
Tier 2.5: Listed as “Outstanding Resource Water”, “Public Water Supply”, “Tributary to Public Water Supply”, all wetlands bordering Outstanding Resource Waters, and vernal pools. (https://www.epa.gov/system/files/documents/2022-01/2022-cgp_tier-3-tier-2-and-tier-2.5-waters.pdf)
Tier 3: Defined as “Special Resource Water”. Note: No waters have been
identified as a Special Resource Water as of the issuance of this
permit. (https://www.epa.gov/system/files/documents/2022-01/2022-cgp_tier-3-tier-2-and-tier-2.5-waters.pdf)