The EPA requires “final stabilization” of soil on a construction site under the National Pollutant Discharge Elimination System (NPDES) permit program and defines this as:
All soil disturbing activities at the [construction] site have been completed and either of the two following criteria are met:
A uniform (e.g,, evenly distributed, without large bare areas) perennial vegetative cover with a density of 70 percent of the native background vegetative cover for the area has been established on all unpaved areas and areas not covered by permanent structures, or
Equivalent permanent stabilization measures (such as the use of riprap, gabions, or geotextiles) have been employed.
Achieving final stabilization status at construction sites can be challenging. There are many factors that can make or break your project’s goals for timing and cost. Here are some key considerations courtesy of CORE Safety’s Environmental Compliance Manager, Joe Welch.