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HAZARDOUS MATERIALS - Any material, including any substance, waste, or combination thereof, which because of its quantity, concentration, or physical, chemical, or infectious characteristics may cause, or significantly contribute to, a substantial present or potential hazard to human health, safety, property, or the environment when improperly treated, stored, transported, disposed of, or otherwise managed. ILLICIT CONNECTION -Any drain or conveyance, whether on the surface or subsmface, which allows an illegal discharge to enter the MS4, including, but not limited to: (I) Any conveyance which allows any nonstormwater discharge including treated or untreated sewage, process wastewater, and wash water to enter the MS4 and any connection to the storm sewer system from indoor drains and sinks, regardless of whether said drain or connection had been previously allowed, permitted, or approved by an authorized enforcement agency; or (2) Any drain or conveyance connected from a commercial or industrial land use to the MS4 which has not been documented in plans, maps, or equivalent records and approved by an authorized enforcement agency. ILLICIT DISCHARGE -Any direct or indirect 11011-stormwater discharge to the MS4, except as exempted in§ 205-57 of this article. INDUSTRIAL ACTIVITY -Activities requiring the SPDES permit for discharges from industrial activities except construction, GP-98-03, as amended or revised. MS4 - Municipal separate storm sewer system. MUNICIPAL SEPARATE STORM SEWER SYSTEM - A conveyance or system of conveyances (including roads with drainage systems, municipal streets, catch basins, curbs, gutters, ditches, man- made channels, or storm sewers): (1) Owned or operated by the Village of East Aurora; (2) Designed or used for collecting or conveying stormwater; (3) Which is not a combined sewer; and (4) Which is not part of a publicly owned treatment works (POTW) as defined at 40 CFR 122.2. NONSTORMWATER DISCHARGE - Any discharge to the MS4 that is not composed entirely of stormwater. POLLUTANT - Dredged spoil, filter backwash, solid waste, incinerator residue, treated or untreated sewage, garbage, sewage sludge, munitions, chemical wastes, biological materials, radioactive materials, heat, wrecked or discarded equipment, rock, sand and industrial, municipal, and agricultural waste and ballast discharged into water, any of which may cause or might reasonably be expected to cause pollution of the waters of the state in contravention of water quality standards. PREMISES - Any building, lot, parcel of land, or pmiion of land, whether improved or unimproved, including adj acent sidewalks and parking strips. SPECIAL CONDITIONS - (I) Discharge compliance with water quality standards. The condition that applies where the Pag e 2 of 10 55