Illicit discharges to the municipal storm sewer system are comprised of non-stormwater discharges that are expressly prohibited from the municipal storm sewer system unless:
A.
The discharges have received all required federal, state and local permits, including the Rhode Island Pollutant Discharge Elimination System (RIPDES); or
B.
The discharges are included in one of the following categories of discharges:
(1)
Discharges which result from the washdown of vehicles at retail dealers selling new and used automobiles where no detergents are used and individual residential car washing;
(2)
External building washdown where no detergents are used.
(3)
The use of water to control dust.
(4)
Fire-fighting activities.
(5)
Fire hydrant flushing.
(6)
Natural springs.
(7)
Uncontaminated groundwater.
(8)
Dechlorinated pool discharges.
(9)
Air conditioning condensate.
(10)
Lawn watering.
(11)
Potable water sources, including water line flushing.
(12)
Irrigation drainage.
(13)
Pavement washwaters where spills or leaks of toxic or hazardous materials have not occurred (unless all spilled materials have been removed) and where detergents are not used.
(14)
Discharges from foundation or footing drains where flows are not contaminated with process materials such as solvents, or contaminated by contact with soils where spills or leaks of toxic or hazardous materials have occurred.
(15)
Uncontaminated utility vault dewatering.
(16)
Dechlorinated water line testing water.
(17)
Hydrostatic test water that does not contain any treatment chemicals and is not contaminated with process chemicals.