If the rainfall erosivity factor reaches 5 or above, which action is triggered?

If the rainfall erosivity factor reaches 5 or above, which action is triggered?

• A. The LRP shall be required to apply for coverage under this order.
• B. The discharger may proceed without coverage.
• C. The waiver remains in effect.
• D. The permit is automatically renewed.

Answer: (A)

Rainfall erosivity measures how strongly rainfall can detach and transport soil. When this factor reaches 5 or above, the erosion potential is high enough to require formal stormwater permit coverage. In this case, the appropriate action is that the Low Risk Permit must apply for coverage under the order, ensuring the site is regulated and implements the required controls. Proceeding without coverage, seeking a waiver, or automatic permit renewal do not align with the increased erosion risk indicated by a high R value.

Rainfall erosivity measures how strongly rainfall can detach and transport soil. When this factor reaches 5 or above, the erosion potential is high enough to require formal stormwater permit coverage. In this case, the appropriate action is that the Low Risk Permit must apply for coverage under the order, ensuring the site is regulated and implements the required controls. Proceeding without coverage, seeking a waiver, or automatic permit renewal do not align with the increased erosion risk indicated by a high R value.