(A) Major contributor permits.
(1) Any industrial user and any other user on demand of the Board shall provide the city with sufficient information to determine if he or she is a major contributor. Any user determined to be a major contributor shall be required to obtain a permit which describes the wastewater constituents and characteristics allowed and which sets forth the applicable surveillance schedule and the monitoring requirements the user shall be subject to in order to discharge into the sewerage system. A major contributor permit shall be valid for four years unless processing changes are made that, in the opinion of the Superintendent or Board, alter the wastewater constituents and characteristics significantly. In the event of such a change, a new application shall be filed accordingly. A permit may be renewed without re-application at the end of the four years at the discretion of the city.
(2) Nothing in a major contributor permit shall constitute an exception to the prohibitions and limitations on wastewater admissibility as set forth herein. Major contributors are subject to all applicable fees, rates, and charges set forth in this chapter.
(B) Major contributor permit applications, fees.
(1) Major contributors shall make application for the proposed discharge on a form provided by the city. The permit application shall be supplemented by any plans, specifications, studies, or other information considered pertinent by the Board.
(2) Permit fees for major contributors shall be as follows.
Initial Major Contributor Permit | Permit Fee |
Industries connected to sewerage works prior to the effective date of this chapter | $20 |
Industries connected to sewerage works after the effective date of this chapter | $100 |
(C) Surveillance of major contributors.
(1) To establish a feasible surveillance schedule, the following classes of major contributors are formed.
Class | Qualifications | Minimum Surveillance Schedule |
A | Flow of 100,000 gallons per day (0.1 MGD) and greater per average workday | Quarterly |
B | Flow from 0.05 MGD to 0.1 MGD per average workday or discharge with constituents or characteristics that result in a major contributor classification | Semi-annually |
(2) The surveillance period will normally be for a period of seven consecutive days, but can be of longer or shorter duration at the discretion of the Board or Superintendent. In cases where the surveillance period extends for a greater number of consecutive days than seven, the city shall have the prerogative of selecting the seven consecutive days of its choice for establishing rates and charges as provided for in this chapter.
(3) The charge for each surveillance survey shall be $20 per day with a maximum charge for seven days of $140.
(D) Monitoring of major contributors.
(1) A major contributor shall install at its own expense:
(a) A suitable control manhole, together with such necessary appurtenances in or on each building lateral sewer to facilitate observation, sampling, and measurement of the wastewater; and
(b) Such sampling devices as may be reasonably necessary, all unless otherwise instructed by the city.
(2) A user may be required by the city to install such manholes to verify his or her status either as a major contributor or otherwise. Such manholes and sampling and testing devices shall be constructed and maintained to the city’s satisfaction at the expense of the user, but shall be under the control of the city.
(3) The city may provide monitoring equipment during a surveillance period for control manholes.
(4) Monitoring equipment shall, unless otherwise specified by the city, include a device for automatically measuring flow and a device for automatically taking a composite sample of wastewater during a 24-hour period.
(E) Limitations on point of discharge. No person shall discharge any substance directly into a manhole or other opening in the sewerage system other than through the approved building (or house) lateral sewer, except in accordance with the terms of this chapter or by express permission of the Board.
(F) Special agreements. Special agreements and arrangements between the city and any person may be established by the Board within the terms and intent of this chapter when, in the opinion of the Board, unusual or extraordinary circumstances compel special terms and conditions whereby an unusual wastewater can be accepted for treatment, subject to payment of applicable fees.
(G) Admissibility. No person shall discharge to the sewerage system wastes which cause, threaten to cause, or are capable of causing, either alone or by interaction with other substances:
(1) A fire or explosion;
(2) Obstruction of flow in the sewerage system or injury to the system or damage to the wastewater collection, treatment, or disposal facilities;
(3) Danger to life or safety of personnel;
(4) A nuisance or hindrance of the effective maintenance or operation of the sewer system, such as through having an unusually strong or unpleasant odor;
(5) Air pollution by the release of toxic or unusually malodorous gases or malodorous gas-producing substances; or
(6) Which would not meet any limitations imposed by the treatment facilities of the city’s wastewater treatment plant.
(H) Admissibility; prohibition of unpolluted waters. Unpolluted water, including, but not limited to, city water, cooling water, process water, or blowdown from cooling towers or evaporative coolers shall not be discharged through direct or indirect connection to the sewerage system for purposes of diluting wastewater in order to reduce sewer rates of charges of the user. Limitations on the amount of unpolluted water that is discharged shall be part of a major contributor’s permit.
(I) Admissibility; limitations on radioactive wastes. No person shall discharge, or cause to be discharged, any radioactive waste into the sewerage system.
(J) Admissibility; limitations on the use of garbage. Only properly shredded garbage may be discharged into the sewerage system.
(K) Admissibility; limitations on wastewater strength. All constituents and characteristics which singly or in combination may damage structures or interfere with treatment process include, but are not limited to, the following constituents and characteristics, with maximum concentration as shown below:
(1) No person shall discharge any wastewater with;
(a) A BOD5 concentration in excess of 300 mg/l (milligrams per liter), except in the case of a major contributor;
(b) A suspended solids concentration in excess of 350 mg/l;
(c) A temperature higher than 150°F (65.5°C); or
(d) A pH lower than 6.0 or higher than 9.0.
(2) No person shall discharge any wastewater containing concentration in excess of:
(a) 0.2 mg/l cadmium;
(b) 2.0 mg/l cooper;
(c) 1.0 mg/l cyanide;
(d) 2.0 mg/l lead;
(e) 1.0 mg/l mercury;
(f) 2.0 mg/l nickel;
(g) 2.0 mg/l silver;
(h) 2.0 mg/l total chromium;
(i) 4.0 mg/l zinc;
(j) 200 mg/l oil and grease (animal or vegetable origin);
(k) 100 mg/l oil and grease (mineral or petroleum origin); or
(l) 1.0 mg/l phenolic compounds which cannot be removed by the wastewater treatment process.
(3) No person shall discharge any wastewater which will cause the city to violate any conditions of its NPDES permit.
(L) Grease, oil, and sand interceptors. Such interceptors shall be provided at:
(1) All restaurants; and
(2) All industrial or commercial enterprises when, in the opinion of the city, they are necessary to contain grease, flammable wastes, or sand and other harmful inert materials. All interceptors shall be approved by the city and shall be readily and easily accessible for cleaning and inspection.
(M) Liability for maintenance of pretreatment and other equipment. Where pretreatment or flow-equalizing facilities are provided for any waters or wastes, they shall be maintained continuously in satisfactory and effective operation by the user at his or her expense, and shall at all reasonable times be open to inspection and testing by the city.
(N) Right to reject waste. The city shall have the right to reject waste and prohibit the introduction of rejected waste into the sewerage system, or the city may require pretreatment of the waste when the strength or character of the waste is such that it could cause damage to, or interfere with, the operation of the sewerage system.
(O) Surcharge for strength of waste. The city shall have the right to impose a surcharge for waste discharged into the sewerage system whose strength or character is such that the introduction of such waste into the sewerage system may cause additional costs to the system.
(2003 Code, § 13.12.150) (Ord. 80-2, passed 1-14-1980) Penalty, see § 52.99