All users affected by the Categorical Standards shall comply with the standards as set forth in 40 CFR Chapter I, subchapter N, parts 405-471. However, with regard to those Categorical Standards where the City has adopted limits more stringent than those contained in the Categorical Standards, the specific prohibitions or limits on pollutants or pollutant parameters as developed by the City in accordance with this chapter shall be deemed the applicable pretreatment requirements.
(895-CS, Enacted, 04/11/1996)
Except when expressly authorized to do so by applicable pretreatment standards or other pretreatment requirements, no industrial user shall increase the use of process water, or in any other way attempt to dilute a discharge as a partial or complete substitute for adequate pretreatment to achieve compliance with a pretreatment standard. The City may limit the total quantity that industrial users may use for dilution to meet applicable pretreatment standards, or in other cases where quantity limitations are appropriate.
(895-CS, Enacted, 04/11/1996)
(a) 
Prohibited discharges. No user shall discharge, or cause or permit to be discharged, directly or indirectly into the sewer system:
(1) 
Any pollutant or wastewater which either alone or by interaction with other substances causes or threatens to cause or is capable of causing:
(i) 
A hazard to human life or the environment or creates a public nuisance;
(ii) 
Interference with the operation or performance of the POTW, its sludge processes, use or disposal practices;
(iii) 
A pass-through;
(iv) 
The use of a disproportionate share of the system; or
(v) 
Excessive City collection, storage, disposal or treatment cost.
(2) 
Any noxious or malodorous liquids, gases, or solids which, either singly or by interaction with other wastes, are sufficient to create a public nuisance or hazard to life or health, or are sufficient to prevent entry into the sewer system for maintenance and repair;
(3) 
Storm water, ground water, rainwater, street drainage, sub-surface drainage, yard drainage, pond water, or pools with diatomaceous earth filters not having separation tanks;
(4) 
Any waste or wastewater containing radioactive materials of such half-life or concentration as may exceed limits established by applicable state or federal laws or regulations.
(5) 
Wastes containing trace elements in excess of:
(i) 
.05 mg/l arsenic;
(ii) 
.03 mg/l cadmium;
(iii) 
1.0 mg/l copper;
(iv) 
.2 mg/l lead;
(v) 
.0024 mg/l mercury;
(vi) 
.23 mg/l nickel;
(vii) 
.06 mg/l silver;
(viii) 
.8 mg/l total chromium;
(ix) 
5.0 mg/l zinc;
(6) 
Waste containing purgeable halocarbons in excess of
(i) 
.04 mg/l 1,4-dicholorbenzene;
(ii) 
.3 mg/l chloroform;
(iii) 
.6 mg/l tetrachloroethylene;
(7) 
Waste containing purgeable aromatics in excess of;
(i) 
62 mg/l toluene;
(ii) 
4.2 mg/l benzene;
(8) 
Waste containing pesticides and PCB's in excess of 20 mg/l;
(9) 
Waste containing purgeable organics not previously mentioned in excess of .08 mg/l;
(10) 
Waste containing tributyltin in excess of .04 mg/l, and cyanide in excess of .2 mg/l;
(11) 
Waste containing surfactants in excess of 250 mg/l unless as authorized by City issued waste discharge permit.
(12) 
Any liquids, solids, or gases which by reason of their nature or quantity within the waste stream are, or may be, sufficient, either alone or by interaction with other substances, to cause fire or explosion, cause the waste stream to have a closed cup flashpoint of less than 140 or 60 when tested following the procedures and methods specified in 40 CFR 261.21, or may be injurious in any other way to the POTW or to its operations. At no time shall two (2) successive readings on an explosion hazard meter at the Point of Discharge into the system, or at any point in the system, be more than five (5%) percent nor any single reading more than ten (10%) percent of the lowest explosive limit of the meter;
(13) 
Solids or viscous substances in amounts which will cause obstruction to the flow in the POTW resulting in Interference;
(14) 
Any wastewater having a pH less than 5.5, or more than 8.5, or in excess of the limitations specified in any less stringent permit or regulation or wastewater that has any other corrosive property capable of causing damage or hazard to structures, equipment, and/or personnel of the City, unless the POTW is specifically designated to accommodate those discharges, or authorized by City issued waste discharge permit.
(15) 
Any substance which may cause violations of the City NPDES Permit or the receiving water quality standards;
(16) 
Pollutants with heat in amounts which will inhibit biological activity in the POTW resulting in interference, but in no case shall the temperature at the POTW exceed 40 C (104 F) or exceed 60.0 C (140 F) at the Point of Discharge;
(17) 
Any pollutant, including oxygen demanding pollutants ("BOD," etc.), released in a discharge at a flow rate and/or Pollutant concentration which will cause Interference with the POTW;
(18) 
Petroleum oil, nonbiodegradable cutting oil, or products of mineral oil origin in amounts greater than 100 mg/l or will cause interference or a pass-through;
(19) 
Oil and grease of animal or vegetable origin in amounts greater than 300 mg/l or will cause interference of a pass-through;
(20) 
Pollutants which result in the presence of toxic gases, vapors, or fumes within the POTW in a quantity that may cause health and safety problems for workers;
(21) 
Any trucked or hauled pollutants, except at discharge points designated by the City;
(22) 
Any other substance or material which causes, threatens to cause, or is capable of causing the sewer system to be overloaded in capacity or pollutants;
(23) 
Waste containing in excess of 1.0 mg/l phenolic compounds which cannot be removed by the City's Wastewater treatment process.
(b) 
Waste storage and processing. Wastes prohibited by this section shall not be processed or stored in such a manner that they could be discharged to the POTW. All floor drains located in process or materials storage areas shall discharge to the user's pretreatment facility before connecting to the POTW.
(c) 
Director action to correct. When the Director determines that a user is discharging any of the above-enumerated substances in amounts that cause interference with the operation of the POTW, the Director may, at his or her discretion, take action, as deemed necessary, to correct the interference.
(d) 
Affirmative defenses. A user shall have an affirmative defense in any action brought against the user alleging a violation of the prohibitions in subsection (a) when the user can demonstrate that:
(1) 
It did not know or have reason to know that its discharge, alone or in conjunction with a discharge or discharges from other sources, would cause a pass-through or interference; and
(2) 
(i) 
A local limit designed to prevent a pass-through and/or interference was developed in accordance with the requirements of 40 CFR 403.5 for each pollutant in the user's discharge that caused a pass-through or interference, and the user was in compliance with each local limit directly prior to and during the pass-through or Interference; or
(ii) 
If a local limit designed to prevent a pass-through and/or interference, as the case may be, has not been developed in accordance with the requirements of 40 CFR 403.5(c) for the pollutant(s) that caused the pass-through or interference, the user's discharge directly prior to and during the pass-through or interference did not change substantially in nature or constituents from the user's prior discharge activity when the City was regularly in compliance with the City NPDES Permit requirements and, in the case of interference, applicable requirements for biosolid beneficial reuse/disposal.
(895-CS, Enacted, 04/11/1996; 1176-CS, Amended, 12/27/2012)
No person shall discharge or throw any substance or material into a maintenance hole or into other openings in the sewer system, unless a written application for such discharge has been filed with the City, the applicable user charges and fees have been paid, and the Director has, in his or her discretion, issued a Waste Discharge Permit or letter authorizing such direct discharges for the purposes and for the substances specified in the Waste Discharge Permit or letter.
(895-CS, Enacted, 04/11/1996)
No person shall discharge, or cause or permit to be discharged, directly or indirectly into the sewer system, water from cooling towers, evaporative coolers, or air-conditioning units. The provisions of this section shall not apply to facilities installed and in use on June 1, 1976; provided, however, that these facilities shall not be exempt from this section if they are expanded or if they are changed, repaired, or modified, at a cost in excess of twenty-five (25%) percent of the replacement value.
(895-CS, Enacted, 04/11/1996)
(a) 
General. Interceptors shall be installed when, in the judgment of the Director, they are necessary for the proper handling of liquid wastes containing grease, flammable wastes, sand, oil, solids, acid or alkaline substances, or other ingredients harmful to the building drainage system, the sewer system, or private sewer facilities. The design, capacity, and installation of all Interceptors shall be approved by the Director.
(b) 
When required. No person shall discharge, or cause or permit to be discharged, directly or indirectly into the system, water which contains material deleterious to the system, such as sand, oil, and grease, without such water first passing through a required interceptor. Interceptors are required as follows:
(1) 
Recreational vehicle dump stations shall have a sand and oil interceptor.
(2) 
Vehicle wash stations shall have a sand and oil interceptor.
(3) 
Restaurants and other commercial food service facilities that produce grease, cooking oil or other materials in quantities that in the City's opinion may interfere with the proper functioning of the sewer system, shall be required to install an approved grease interceptor.
(4) 
The installation of a grease interceptor shall be required for all services which prepare or serve food for consumption by the public, clubs, organizations, social activities, or groups of people, excluding single-family residences.
(5) 
Floor drains shall have a sand and oil interceptor if the Director so mandates.
(6) 
When a grease or sand and oil interceptor is required by this section, but was not required at the time of the original occupancy, the interceptor shall be required at the time of a change of the occupant, occupancy, tenant, owner, or use.
(c) 
Surcharge for noncompliance. Users not in compliance with this section shall be required to pay a surcharge of one hundred (100%) percent in addition to the regular charge for sewer service. This surcharge shall continue until such time as the user is in compliance with this section or meets the requirements of subsection (d) of this section.
(d) 
Sample stations. To satisfy the provisions of this section, a user may install a City sample station from which the City shall sample and test the discharge, at the expense of the user. The charge upon a user for discharges to the system shall be set by resolution of the Council and may consider BOD, Total Suspended Solids, and flow. The quantity of flow shall be determined by the user's water meter reading.
(895-CS, Enacted, 04/11/1996)
To prevent the discharge of hazardous waste, a monitoring program, as reflected below, is hereby established. All users who may potentially discharge hazardous waste, as determined by the Director, shall install at the user's cost, a city-approved sampling station. These sampling stations shall be located within the sewer Line on the owner's land and shall be placed above the connection to the sewer system. Collection and analysis of samples shall be periodically performed, as needed, as determined by the Director. The owner of the land and/or the user shall be responsible for any costs associated with sample collection and lab analysis.
(895-CS, Enacted, 04/11/1996)
The City reserves the right to establish, by ordinance, more stringent limitations or requirements on discharges to the sewer system if deemed necessary to comply with the objectives in this chapter.
(895-CS, Enacted, 04/11/1996)