Rhode Island

Multi-Sector General Permit RIPDES Storm Water Discharge Associated with Industrial Activity, effective 8/15/13 thru 8/14/2018.

Measurable Storm Events: All required monitoring must be performed on a storm event that results in an actual discharge from the site (“measurable storm event”) that follows the preceding measurable storm event by at least 72 hours (3 days). The 72-hour (3-day) storm interval does not apply if the permittee is able to document that less than a 72-hour (3-day) interval is representative for local storm events during the sampling period. In the case of snowmelt, the monitoring must be performed at a time when a measurable discharge occurs at the site.