Any discharge into any street, gutter, ditch, channel, watercourse, drain, stormwater
inlet or storm sewer of any wastewater, including but not limited to sand/grit trap
sludges and restaurant grease trap sludges, or liquid waste containing cement, concrete,
building materials, oil, chemicals, wastewater or other liquid industrial waste, such
as all waterborne solids, liquids or gaseous waste containing toxic or poisonous substances
in amounts prohibited by any federal or state regulation or any substance which can
block or interfere with the flow in any of the previously named storm sewers and other
public rights-of-way is prohibited. Any discharge of process water into the city's
stormwater collection system, which is in accordance with city-issued permit, which
may be based upon a National Pollutant Discharge Elimination System (NPDES) permit
and applicable state permits, shall be an exception to this prohibition.