Which of the following is true regarding BMP installation on a construction site?

The assertion that BMPs, or Best Management Practices, must be installed after drainage area stabilization is correct because proper stormwater management is critical during the construction phase to prevent erosion and sedimentation, which can adversely affect water quality. Drainage area stabilization refers to the process of ensuring that the ground surface is protected from erosion, typically through the use of vegetation or other methods that hold the soil in place.

Installing BMPs after this stabilization ensures that they function effectively. If BMPs are put in place before the drainage areas are stabilized, they may be compromised by erosion or sediment runoff from the construction activities, which could result in the BMPs failing to achieve their intended purpose. Thus, integrating BMP installation with proper site stabilization provides a synergistic effect that enhances stormwater management and compliance with environmental regulations.

In contrast, the other options do not align with effective stormwater management practices during construction. BMPs must be strategically implemented throughout the construction process rather than simply at the end or arbitrarily during any phase, which ensures ongoing protection of water quality.