Industrial Stormwater Program
Water Division-Permits Branch
5301 Northshore Drive
North Little Rock, AR 72118-5317

Mo Shafii, Assistant Chief

Authorization to Discharge Stormwater Under the National Pollutant Discharge Elimination System and the Arkansas Water and Pollution Control Act (Permit No ARRR000000), effective 7/1/14 thru 6/30/19)

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 facility is able to document that less than a 72-hour (3-day) interval is representative for local storm events during the sampling period. For each monitoring event, the date and duration (in hours) of the rainfall event, rainfall total (in inches) for that rainfall event, and time (in days) since the previous measurable storm event must be identified.

Magnitude: results in actual discharge

Interval between storms: 72 hours, unless less than that is representative

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