(a) 
Pollutants introduced into the POTW by non-domestic sources shall not pass through the POTW or interfere with the operation or performance of the works.
(b) 
An industrial user shall not cause or significantly contribute to a violation of any requirement of the POTW's operating permit. An industrial user significantly contributes to such permit violation where it:
(1) 
Discharges a daily pollutant loading in excess of that allowed by contract with the POTW or by federal, state or local law;
(2) 
Discharges wastewater which substantially differs in nature and constituents from the user's average discharge;
(3) 
Knows or has reason to know that its discharge, alone or in conjunction with discharges from other sources would result in a permit violation; or
(4) 
Knows or has reason to know that the POTW is, for any reason, violating its final effluent limitations in its permit and that such industrial user's discharge either alone or in conjunction with discharges from other sources, increases the magnitude or duration of the POTW's violations.
(Prior Code § 20-50(C); Ord. 83-1054 § 1, eff. 6/16/83; Ord. 2005-01, eff. 3/3/05)
(a) 
No person shall discharge to a community sewer any:
(1) 
Solid or viscous pollutants in amounts which will cause obstruction to the flow in the POTW resulting in interference;
(2) 
Pollutants, including oxygen demanding pollutants (BOD, etc.), release in a discharge at a flow rate and/or pollutant concentration which will cause interference with the POTW;
(3) 
Quantities or rates of flow which overload the City's collection or treatment facilities or cause excessive proportionate share of the City facilities;
(4) 
Radiological, chemical or biological warfare agents;
(5) 
Radioactive waste;
(6) 
Wastewater containing toxic pollutants in sufficient quantity, either singly or by interaction with other pollutants, to injure or interfere with any wastewater treatment process, constitute a hazard to humans or animals, create a toxic effect in the receiving waters of the POTW, or to exceed the limitation set forth in a categorical pretreatment standard. A "toxic pollutant" includes but is not limited to any pollutant identified pursuant to Section 307(a) of the Act;
(7) 
Substance which will cause the POTW to violate its WDR/NPDES and/or State disposal system permit or the receiving water quality standards;
(8) 
Trucked or hauled pollutants, except at discharge points designated by the POTW.
(b) 
No person shall discharge to a community sewer materials which cause, or are capable of causing, either alone or with other substances:
(1) 
Fire or explosion; at no time shall two 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 5% nor any single reading over 10% of the lower explosive limit (LEL) of the meter. Prohibited materials include, but are not limited to, gasoline, kerosene, naphtha, benzene, toluene, xylene, ethers, alcohols, ketones, aldehydes, peroxides, chlorates, perchlorates, bromates, carbides, hydrides, sulfides, pollutants which create a fire or explosion hazard in the POTW (including, but not limited to, waste streams with a closed cup flash point of less than 140 degrees Fahrenheit or 60 degrees Centigrade using the test methods specified by Section 261.21 of Title 40 of the Code of Federal Regulations), and any other substances which the City, the State or EPA has notified the user is a fire hazard to the system;
(2) 
Obstruction of flow in a community sewer system or injury to the system or damage to the wastewater collection, treatment or disposal facilities;
(3) 
Danger to human life or safety of personnel;
(4) 
A nuisance or prevention of the effective maintenance or operation of the wastewater collection and treatment system;
(5) 
Air pollution by the release of toxic malodorous gases or malodorous gas-producing substances; or pollutants which result in the presence of toxic gases, vapors or fumes within the POTW in a quantity that may cause acute worker health and safety problems;
(6) 
Unsuitability of the City's effluent or any of the following products of the treatment processes, residues, sludge and scums, for reclamation and reuse;
(7) 
A detrimental environmental impact or a nuisance in waters or a condition unacceptable to any public agency having regulatory jurisdiction over the City;
(8) 
Discoloration or any other condition in the quality of the City's treatment plant effluent such that water quality discharge requirements established by law cannot be met;
(9) 
Conditions at or near the City's treatment plant which violate any statute or any rule, regulation or ordinance of any public agency, state or federal regulatory body;
(10) 
A slug;
(11) 
Interference or pass through due to petroleum oil, non-biodegradable cutting oil, or products of mineral oil origin.
(c) 
No person shall ever increase the use of process water, or in any other way attempt to dilute a discharge as a partial or complete substitute for adequate treatment to achieve compliance with a pretreatment standard or requirement. (40 CFR 403.6(d))
(Prior Code § 20-50(D); Ord. 83-1054 § 1, eff. 6/16/83; Ord. 90-28 § 1, eff. 1/3/91; Ord. 2005-01, eff. 3/3/05; Ord. 2019-09, eff. 12/19/19)
Storm water, swimming pool water, groundwater, rainwater, street drainage, roof drainage, subsurface drainage, unpolluted water or yard drainage will not be discharged through direct or indirect connections to a community sewer. Every private or public wash rack and/or floor or slab drain used for cleaning machinery or machine parts shall be adequately protected against storm or surface inflow.
(Prior Code § 20-50(E); Ord. 83-1054 § 1, eff. 6/16/83)
Water, including but not limited to cooling water, process cooling water or blow-down from cooling towers or evaporative coolers will not be discharged through direct or indirect connection to a community sewer.
(Prior Code § 20-50(F); Ord. 83-1054 § 1, eff. 6/16/83)
(a) 
Waste from garbage grinders shall not be discharged into a community sewer except wastes generated in preparation of food consumed on the premises.
(b) 
Such grinders must shred the waste to a degree that all particles will be carried freely under normal flow conditions prevailing in the community sewer and three-eighths (3/8) inch or less in diameter and shall not be used for grinding plastic, paper products, inert materials or garden refuse.
(c) 
The installation of any garbage grinder with a motor of 3/4 horsepower or greater shall be subject to the review and approval of the Director of Utilities.
(Prior Code § 20-50(G); Ord. 83-1054 § 1, eff. 6/16/83; Ord. 2005-01, eff. 3/3/05)
No discharge of any substances shall be made directly into a manhole or other opening in a community sewer other than through an approved side sewer or force main connection installed and/or inspected and approved by the Director of Utilities subject to permit requirements of this chapter.
(Prior Code § 20-50(H); Ord. 83-1054 § 1, eff. 6/16/83; Ord. 2005-01, eff. 3/3/05)
A user proposing to discharge holding tank wastes into the City wastewater collection and treatment system must secure a permit to do so. The permit may contain specific requirements for additional holding tanks, flow-regulating devices, flow-measuring devices and pH adjustment as required by the Director of Utilities for the protection of the system. Discharges from vacuum pump tank trucks shall be made at the wastewater treatment plant only.
(Prior Code § 20-50(I); Ord. 83-1054 § 1, eff. 6/16/83; Ord. 2005-01, eff. 3/3/05)
No person shall discharge wastewater containing in excess of the following concentrations of the pollutants listed:
Pollutant
Twenty-Four-Hour
Maximum Limit* (mg/l)
Maximum Thirty-Day
Average Limit (mg/l)
As
1.50
1.00
B
1.00
0.30
Cd
1.50
0.70
Cr, total
4.00
2.00
Cr, hexavalent
0.50
0.20
Cu
4.00
2.00
CN
2.00
1.00
Pb
1.00
0.60
Hg
0.50
0.20
Ni
3.00
1.80
Ag
3.00
2.00
Zn
3.00
1.40
Phenols, total
4.00
3.00
Pentachlorophenol
0.10
0.05
Total metals
7.50
4.00
TDS
N/A
1820
Na
N/A
350
Cl
N/A
250
Notes:
*
Designed primarily to prevent industry from discharging entire 30 day average over a two or three day period.
*
Editor's Note: Ord. 83-1054 contained two Sections 20-50 (J) (1). The other is codified in Section 8-12.409.
(Prior Code § 20-50(J)(1); Ord. 83-1054 § 1, eff. 6/16/83; Ord. 2005-01, eff. 3/3/05)
No person shall discharge any wastewater:
(a) 
Having a temperature higher than 120 degrees Fahrenheit (48.9 degrees Celsius), and heat in amounts which will inhibit biological activity in the POTW resulting in interference, but in no case heat in such quantities that the temperature at the POTW treatment plant exceeds 40 degrees Celsius (104 degrees Fahrenheit) unless the approval authority, upon request of the POTW, approves alternate temperature limits;
(b) 
Containing more than 100 mg/l of oil or grease of animal or vegetable origin;
(c) 
Containing more than 100 mg/l of oil or grease of mineral or petroleum origin;
(d) 
Having a pH lower than 5.5 or higher than 9.5 or having any corrosive properties capable of causing damage or hazard to structures, equipment or personnel of the wastewater collection and treatment system;
(e) 
Containing in excess of 0.02 mg/l total identifiable chlorinated hydrocarbons which cannot be removed by the City's wastewater treatment process;
(f) 
Having a settleable solids content higher than 20 milliliters per liter;
(g) 
Containing in excess of 500 mg/l BOD, 500 mg/l SS or 1,000 mg/l COD, unless specifically allowed in the wastewater discharge permit or, if less than 20 lb/day of COD or 10 lb/day of BOD and SS;
(h) 
Containing residual chlorine in excess of five (5.0) mg/l;
(i) 
Containing brine waste which exceeds the equivalent discharge rate of 5,000 pounds of salt per month, 18 months after the effective date of the Ordinance codified in this Section.
(Prior Code § 20-50(J)(1); Ord. 83-1054 § 1, eff. 6/16/83[1]; Ord. 92-4 §§ 1, 2, eff. 4/16/92; Ord. 2005-01, eff. 3/3/05; Ord. 2019-09, eff. 12/19/19)
[1]
Editor's Note: Ord. 83-1054 contained two Sections 20-50(J)(1). The other is codified in Section 8-12.408.
No statement contained in Sections 8-12.408 or 8-12.409 shall be construed as preventing the Director of Utilities from issuing a discharge permit allowing an industrial waste of unusual strength of character provided that the discharge does not violate State or federal pretreatment requirements. The discharger shall pay all extra costs incurred by the City connected with treating such discharge.
(Prior Code § 20-50(J)(3); Ord. 83-1054 § 1, eff. 6/16/83; Ord. 2005-01, eff. 3/3/05; Ord. 2019-09, eff. 12/19/19)
(a) 
Upon the promulgation of the federal categorical pretreatment standards for a particular industrial subcategory, the federal standard, if more stringent than limitations imposed under this chapter for sources in that subcategory, shall immediately supersede the limitations imposed under this chapter. The Director of Utilities shall notify all affected users of the applicable reporting requirements under 40 CFR, Section 403.12. Users in industrial categories subject to effluent guidelines issued under Section 304 (b) of the Federal Act are required to adopt best practicable control technology currently available as defined pursuant to that section.
(b) 
The pretreatment standard for incompatible pollutants introduced into the City wastewater collection and treatment system by a substantial industrial discharger not subject to Section 307 (c) of the Federal Act shall be that established by promulgated effluent guidelines defining the best practicable control technology currently available pursuant to Section 301 (b) and 304 (b) of the Federal Act.
(c) 
As a minimum, pursuant to other requirements of this chapter, users in SIC Division D, Major Group 20 (food and kindred products) and in SIC Division I, SIC numbers 7210 through 7219 (laundry, cleaning and garment services) shall screen their wastewater through a one-eighteenth (1/18) inch or 20 mesh to the inch screen or hydrosieve prior to discharging to the wastewater collection and treatment system.
(d) 
The City shall require screening, settling, storage or other pretreatment of any industrial waste prior to its being discharged into the City's wastewater collection and treatment system where it is determined by the Director of Utilities that the requirement is necessary to meet the discharge limitations as outlined in this chapter
(Prior Code § 20-50(K)(1); Ord. 83-1054 § 1, eff. 6/16/83; Ord. 2005-01, eff. 3/3/05)
(a) 
Grease, oil, lint, hair and/or sand traps shall be provided when, in the opinion of the Director of Utilities, they are necessary for the protection of the wastewater collection and treatment system from liquid wastes containing grease in excessive amounts, or any flammable wastes, sand and other harmful ingredients; except, that such traps shall not be required for building, used solely for residential purposes. Such traps shall be required, for example, on discharges from all service stations, restaurants, automotive repair garages, wash racks, laundries, barbershops and beauty shops, and dry cleaning establishments.
(b) 
All traps shall be of a type, capacity and design approved by the Director of Utilities, and shall be so located as to be readily and easily accessible for cleaning and inspection. Restaurant traps shall be gas tight, of a type approved for restaurant use by the State and/or county health departments.
(c) 
Individual traps shall be installed and maintained by the permittee, at his expense, in continuously efficient operation at all times for each facility requiring a Wastewater Discharge Permit.
(d) 
The minimum allowable grease trap size (based on occupancy) permitted for installation is 20 gallons or 40 pounds, and in no case less than the minimum specified by the currently adopted Uniform Plumbing Code.
(Prior Code § 20-50(K)(2); Ord. 83-1054 § 1, eff. 6/16/83; Ord. 2005-01, eff. 3/3/05; Ord. 2024-05, eff. 5/16/2024)
Wastes not permitted to be discharged into the community sewer or recovered from pretreatment devices or traps shall be transported to a state-approved disposal site in accordance with Chapter 8-11 of this Code and all applicable Codes and regulations.
(Prior Code § 20-50(L); Ord. 83-1054 § 1, eff. 6/16/83)