(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:
(1) Any water or waste containing more than 100 milligrams per liter of petroleum or other non-biodegradable oils;
(2) Any waters or wastes having a color which is not removable by the existing wastewater treatment plant processes which causes the POTW effluent to exceed color requirements for discharge to the receiving waters per the NPDES permit;
(3) Any gasoline, benzene, naptha or other hydrocarbon solvents or oils, or other flammable to explosive liquids, solids or gases;
(4) Any other solid or viscous substance in quantity or character capable of causing obstruction to flow in sewers or interference with normal operation of wastewater treatment facilities;
(5) Any noxious, malodorous or dangerous gas or any substance capable of creating a detrimental effect when introduced into the sewerage system;
(6) Any unpolluted wastewater, as defined in § 53.03 above;
(7) Any toxic or poisonous substance or any other materials in sufficient quantity to injure or interfere with the wastewater treatment processes, or to constitute a hazard to humans or animals, or to cause a violation of the water quality standards or effluent standards for the stream or watercourse receiving the effluent from any town operated wastewater treatment plant;
(8) Inflow sources, as defined in 40 C.F.R. § 35.905, shall be prohibited in new connections into the sanitary sewer portion of the sewer system; (40 C.F.R. § 35.927.4); and
(9) Heat in amounts, which will inhibit biological activity in the POTW resulting in NPDES permit violations.
(B) No person shall discharge or deposit any of the following described waters or wastes to the sanitary sewer except by special written permit; and then only in strict accordance with the terms of the permit and in compliance with any and all federal and state pretreatment regulations that may apply. No permit will be issued if it appears likely in the opinion of the Director that the wastes can harm either the sewers, sewage treatment process or equipment; have an adverse effect on the receiving stream; violate the national pollutant discharge elimination system or the regulations of the state; or can otherwise endanger life, limb or public property. The Director shall state in writing his or her reasons for denying a permit.
(1) In forming his or her opinion as to the acceptability of the wastes, the Director will give consideration of such factors as the quantities of subject wastes in relation to flows and velocities in the sewers; materials of construction of the sewers; nature of the sewage treatment process; capacity of the sewage treatment plant; degree of treatability of wastes in the sewage treatment plant; and other pertinent factors.
(2) The substances prohibited are:
(a) Any liquid or vapor having a temperature higher than 40°C (104°F);
(b) Any waters or wastes containing fats, wax, grease or oil, whether emulsified or not, in excess of 100 mg/l or containing substances which may solidify or become viscous at temperatures between 32°F and 104°F (40°C);
(c) Any garbage that has not been properly shredded, the installation and operation of any garbage grinder equipped with a motor of three-fourths horsepower or greater shall be subject to the review and approval of the Director;
(d) Any water or wastes containing strong acid or alkaline wastes, iron pickling wastes or concentrating plating solutions which would affect the biological processes employed at the treatment facility either by increasing the acidity and/or alkalinity of the raw (influent) to the treatment facility such that treatment efficiency would be impaired. Prospective dischargers with wastes that fall into the classifications of this division (B)(2)(d) shall be responsible for proving their compliance;
(e) 1. Any water or wastes containing significant amounts of iron, chromium, copper, zinc, dissolved salts and similar objectionable or toxic substances; or wastes exerting an excessive chlorine requirement to such degree that any such material received in the composite sewage at the sewage treatment works exceeds the specific limits established as follows:
a. Hexavalent chromium: 0.10 mg/l;
b. Trivalent chromium: 0.10 mg/l;
c. Nickel: 0.10 mg/l;
d. Cyanide: 0.10 mg/l;
e. Zinc: 1.00 mg/l;
f. Copper: 0.10 mg/l;
g. Iron: 5.00 mg/l;
h. Aluminum: 0.10 mg/l;
i. Lead: 0.10 mg/l; or
j. Silver: 0.10 mg/l.
2. Limits on the concentrations of other metallic constituents and/or toxic substances which may have a detrimental effect on the sewage treatment works may be established by the Director and the State Department of Natural Resources and Community Development, unless the prospective discharger can prove to the aforementioned parties that the substances are amenable to treatment at the treatment works.
(f) Any waters or wastes containing phenols or other taste or odor producing substances, in such concentrations exceeding limits which may be established by the Director as necessary after treatment to meet the requirements of the state, federal or other public agencies with jurisdiction over the discharge to the receiving waters;
(g) Any radioactive wastes or isotopes of such half life or concentration as may exceed limits established by the Director in compliance with applicable state or federal regulations;
(h) Any waters or wastes having a stabilized pH lower than 5.0 or higher than 9.0, or having any other corrosive property capable of causing damage or hazard to structures, equipment and personnel of the sewage works;
(i) Materials which exert or cause:
1. Excessive concentrations of inert suspended and dissolved solids;
2. Excessive BOD (greater than 300 mg/l), chemical oxygen demand (greater than 750 mg/l) or chlorine requirements in such quantities as to constitute a significant load on the POTW; or
3. Unusual volume of low or concentration of wastes constituting "slugs" as defined herein.
(j) Any waters or wastes containing substances which are not amenable to treatment or reduction by the sewage treatment processes employed, or are amenable to treatment only to such degree that the sewage treatment plant effluent cannot meet the requirements of other agencies having jurisdiction over discharge to the receiving waters; or
(k) Any waters or wastes containing suspended solids in excess of 300 mg/l.
(C) Grease, oil and sand interceptors shall be provided when, in the opinion of the Director, they are required for the proper handling of wastes except that the interceptors or traps shall not be required for private living quarters or dwelling units. All interceptors shall be of a type and capacity approved by the Director and shall be located so as to be readily accessible for cleaning and inspection. The discharger at his or her expense shall maintain them, in continuous and effective operation at all times.
(D) (1) Each discharger shall provide protection from accidental discharge of prohibited materials or other substances regulated by this chapter. Facilities to prevent accidental discharge of prohibited materials shall be provided and maintained at the discharger's own cost and expense. No user who commences contribution to the POTW after the effective date of this chapter shall be permitted to introduce pollutants into the system until accidental discharge procedures have been approved by the Town Council, and approval of the plans and operating procedures shall not relieve the industrial user from the responsibility to modify the user's facility as necessary to meet the requirements of this chapter. In the case of an accidental discharge, it is the responsibility of the discharger to immediately telephone and notify the POTW of the incident. The notification shall include location of discharge, type of waste, concentration and volume, and corrective actions.
(2) Within five days following an accidental discharge, the discharger shall submit to the Director a detailed written report describing the cause of the discharge and the measures to be taken by the discharger to prevent similar future occurrences. The notification shall not relieve the discharger of any expense, loss, damage or other liability, which may be incurred as a result of damage to the POTW, fish kills or any other damage to person or property; nor shall the notification relieve the discharger of any fines, civil penalties or other liability that may be imposed by this chapter. A notice shall be permanently posted on the discharger's bulletin board or other prominent place advising employees which to call in the event of a dangerous discharge. Employers shall insure that all employees who may cause or suffer such a dangerous discharge to occur are advised of the emergency notification procedure.
(Ord. 97-11-07, passed 11-6-1997) Penalty, see § 53.99