(1) Any gasoline, benzene, naphtha, fuel oil, or other flammable or explosive liquid, solid, or gas;

(2) Any waters or wastes containing toxic or poisonous solids, liquids, or gases in sufficient quantity, either singularly or by interaction with other wastes, to injure or interfere with any sewage treatment process, constitute a hazard to humans or animals, create a public nuisance, or create any hazard in the receiving waters of the sewage treatment plant, including but not limited to cyanides in excess of two mg/l or in the wastes as discharged to the public sewer;

(3) Any waters or wastes having any corrosive or destructive properties capable of causing damage or hazard to structures, equipment, processes, systems, or personnel of the sewage works. The following pH limits will apply: a lower pH limit of 5.5 shall apply, except that discharges between 5.0 and 6.0 may be authorized by the public works superintendent when they occur with flows that never exceed 1,000 gallons per day. It shall be the duty of the special user permit holder to request such authorization prior to making such discharges. The special user permit holder shall construct and maintain a practical means of allowing the town access to monitor and measure discharges to ensure compliance with this subsection and other applicable sections of this chapter. The special user permit holder’s means of monitoring shall be constructed and maintained in consultation with, and be subject to the prior approval of, the public works superintendent.

(4) Solid or viscous substances in quantities or of such size capable of causing obstruction to the flow in sewers, or other interference with the proper operation of the sewage works such as, but not limited to, ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastics, wood, undigested garbage, whole blood, paunch manure, hair and flesh, entrails and paper dishes, cups, milk containers, etc., either whole or ground by garbage grinder. (Ord. 568, 2013; Ord. 550 § 2, 2012)