Under what conditions can onsite support activities be covered under the CGP?

Onsite support activities can be covered under the Construction General Permit (CGP) when they are related to permitted construction activities. This relationship ensures that any support activities—such as staging, storage, or site maintenance—that take place during the construction process adhere to the same regulatory framework. This is important because it helps manage the potential for pollutants to enter stormwater runoff from these activities, ensuring that the overall construction site remains compliant with environmental standards.

Support activities that are conducted alongside or in conjunction with the main construction efforts typically pose similar risks to water quality as those directly related to the construction work itself. Thus, permitting them under the CGP provides a consistent approach to managing stormwater impacts, promoting effective oversight and facilitating better site management practices.

In contrast, activities that are commercial in nature, unrelated to different operations, or occur post-construction do not fall under the purview of the CGP. This is because they either do not have a direct link to the construction activities being permitted or take place outside the regulated timeframe and scope established by the permit. This helps maintain focus on active construction sites where stormwater management is most critical.