(A) No person shall discharge or deposit any of the following materials, waste materials, wastes, gases or liquids into any sewer forming part of the sanitary sewerage system, except where these may constitute occasional, intermittent inclusions in the wastewaters discharged from residential premises:
(1) Any waste, liquid or vapor, at a temperature exceeding 65°C or 150°F or at such lower temperatures that will create hazardous conditions within, or cause deterioration of, the sanitary sewers;
(2) Any waters or wastes containing more than 50 milligrams per liter of petroleum substances, non-biodegradable cutting oils or products of mineral origin;
(3) Wastewater containing oil, fat or grease (exclusive of petroleum substances) of concentrations greater than 100 mg/l, whether emulsified or not, or containing substances which may solidify or become viscous at the point of discharge into the sewer system;
(4) Any garbage that has not been properly shredded. Properly shredded garbage shall not exceed one-half inch in any dimension;
(5) Any waters or wastes having a stabilized pH lower than 6.0 or higher than 9.0 or having any other corrosive property capable of either causing damage or creating a hazard to structures, equipment or personnel of the sanitary sewerage system and wastewater treatment facilities or interfering with proper operation of the town’s wastewater treatment facilities;
(6) Any waters or wastes having a color that is not removable by the existing wastewater treatment plant processes and causes the plant effluent to exceed color requirements for discharge to the receiving waters;
(7) Any waters or wastes having a BOD5 in excess of 350 mg/l unless identified as an industrial waste for billing purposes;
(8) Any waters or wastes having a total suspended solids (TSS) concentration in excess of 350 mg/l unless identified as an industrial waste for billing purposes; and/or
(9) Any waters or wastes having an ammonia (NH3) concentration in excess of 30 mg/l, or a TKN concentration in excess of 50 mg/l, unless identified as an industrial waste for billing purposes.
(B) No person shall discharge or deposit any of the following materials, waste materials, waste gases or liquids into any sewer forming part of the sanitary sewerage system, or into any storm sewer or drain:
(1) Any gasoline, benzene, naphtha or other hydrocarbon solvents or oils, or other flammable or explosive liquids, solids or gases including any waters or wastes which contain, at the point of discharge to the sewer system, explosive elements such that any single reading on an explosion hazard meter exceeds 10% of the lower explosive limit (LEL) or any two successive readings that exceed 5% of the LEL;
(2) Any other solid or viscous substance in quantity or character capable of causing obstruction to flow in sewers or interference with proper operation of wastewater treatment facilities, such as, but not limited to, ashes, cinders, ceramic wastes, paper products, sand, mud, straw, shavings, thread, glass, rags, metal, feathers, bones, tar, plastics, wood, paunch manure, insulation materials, fibers of any kind, stock or poultry feeds, processed grains, viscera or other fleshy particles from processing or packing plants, lime or similar sludges;
(3) Any noxious or malodorous gas or any substance capable of creating a public nuisance when introduced into the sewerage system; and/or
(4) Any unpolluted wastewater into the sewer system, as defined in § 51.001.
(C) No person shall discharge into any sewer forming part of the sanitary sewerage system, any of the following materials in concentrations exceeding the stated limits:
(1) Any toxic or poisonous substance or any other materials in sufficient quantity to injure or interfere with the wastewater treatment processes, to cause a violation of any effluent or sludge disposal permit, or to constitute a hazard to humans or animals, or to cause a violation of the water quality standards or effluent standards for the steam or watercourse receiving the effluent from the town wastewater treatment plant;
(2) Concentrations of heavy metals and other incompatible pollutants in the discharge of any user of the sanitary sewerage system shall not exceed values listed below (all values are in mg/l) or as amended by state or federal regulations:
Pollutant | Concentration |
Pollutant | Concentration |
Antimony | 1.5 |
Arsenic | 0.01 |
Cadmium | 0.1 |
Chromium, hexavalent | 0.1 |
Chromium, total | 0.5 |
Copper | 0.5 |
Cyanide, total | 0.1 |
Lead | 0.5 |
Mercury | 0.05 |
Nickel | 0.5 |
Phenolic compounds | 5.0 |
Selenium | 0.1 |
Silver | 0.1 |
Zinc | 0.5 |
(3) Any radioactive isotope in concentration greater than that permitted by the latest effective regulations promulgated under applicable federal law.
(D) In the event of conflicts between values established in this section and values established by applicable state or federal rules, regulations, laws and the like, the more stringent value shall apply. Effluent limits contained in the town’s national pollutant discharge elimination system (NPDES) permit, the limits of the town’s sludge disposal permit, and water quality standards assigned Newport River shall at no time be exceeded or contravened as a result of discharges to the town’s sewer system either within or without the values established in this section.
(Ord. passed 5-3-2011; Ord. passed 9-11-2014) Penalty, see § 10.99