Storm water, groundwater, rain water, street drainage, subsurface drainage or yard drainage shall not be discharged through direct or indirect connections to the public sanitary sewer of the city.
(Ord. 2013-24, § 1, 7/22/2013)
Unpolluted water, including, but not limited to cooling water, process water or blow-down from cooling towers or evaporative coolers shall be discharged to such sewers as are specifically designated as storm drains or to a natural outlet upon receiving approval from applicable local, state and federal agencies as required, or into the sewer system upon approval of the director.
(Ord. 2013-24, § 1, 7/22/2013)
Waste from garbage grinders shall not be discharged into a public sewer except:
A.
Wastes generated in preparation of food normally consumed on the premises; or
B.
Where the user has obtained a permit for the specific use from the director, and agrees to undertake whatever self-monitoring is required to enable the city to equitably determine the charges and fees based on the waste constituents and characteristics.
Such grinders must shred the waste to a degree that all particles will be carried freely under normal flow conditions prevailing in the public sewer. Garbage grinders shall not be used for grinding plastic, paper products, inert materials or garden refuse.
(Ord. 2013-24, § 1, 7/22/2013)
A.
No person shall discharge or cause to be discharged any of the following described waters or wastes to any public sewers:
1.
Pollutants which create a fire or explosive hazard in the POTW including, but not limited to waste streams with a closed-cup flash point of less than one hundred forty (140) degrees Fahrenheit (sixty (60) degrees Celsius) using test methods specified in 40 CFR 261.21.
2.
Any waters or wastes containing toxic or poisonous solids, liquids or gases in sufficient quantity, either singly or by interaction with other wastes, to injure or interfere with any wastewater treatment process, constitute a hazard to humans or animals, create a public nuisance or create any hazard in the receiving waters of the wastewater facilities.
3.
Any waters or wastes having a pH lower than 5.5 or greater than 10.5, or having any other corrosive property capable of causing damage or hazard to structures, equipment and personnel of the wastewater facilities.
4.
Solid or viscous substances in quantities or of such size capable of causing obstruction to the flow in sewers, or other interference with the proper operation of the wastewater facilities such as, but not limited to, hypodermic needles, ash, ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastics, wood, unground garbage, whole blood, paunch manure, hair and fleshings, entrails, paper dishes and cups, milk containers, etc., either whole or ground by garbage grinders.
5.
Wastewaters whose theoretical equilibrium fume concentration exceeds limits of explosivity or fume toxicity based on criteria and procedures for determining flammability, TLV-TWA fume toxicity limits, and combined effects (synergism), as given in latest publications of the ACGIH and where necessary, supplementary scientific information.
6.
Medical wastes, except as specifically authorized by the director in a discharge permit.
B.
No person shall discharge or cause to be discharged the following described substances, materials, waters, or wastes if it appears likely in the opinion of the director, and not subject to specific federal regulations, that such wastes can harm either the sewers, wastewater treatment process, or equipment, have an adverse effect on the receiving stream, or can otherwise endanger life, limb, public property or constitute a nuisance. In forming his or her opinion as the acceptability of these wastes, the director will give consideration to such factors as the quantities of subject wastes in relation to flows and velocities in sewers, materials of construction of the sewers, nature of the wastewater treatment process capacity of the wastewater treatment works, degree of treatability of wastes in the wastewater treatment works, and other pertinent factors. The substances prohibited are:
1.
Any liquid or vapor having a temperature which will inhibit biological activity at the POTW resulting in interference, but in no case higher than one hundred fifty (150) degrees Fahrenheit (65.9 degrees Celsius) or contributing to a treatment plant influent temperature above one hundred four (104) degrees Fahrenheit (forty (40) degrees Celsius) unless the approval authority, upon request of the POTW, approves alternate temperature limits.
2.
Any water or waste containing substances which may solidify or become viscous at temperatures between thirty-two (32) and one hundred fifty (150) degrees Fahrenheit (0 and 65.9 degrees Celsius).
3.
Any waters or wastes containing strong acid iron pickling wastes, or concentrated plating solutions whether neutralized or not.
4.
Any petroleum oil, nonbiodegradable cutting oil, or products of mineral oil origin in amounts that will cause interference or pass through.
5.
Any 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.
Any waters or wastes containing objectionable or toxic substances, or wastes exerting an excessive chlorine requirement, to such degree that any such discharge exceeds limits established by this chapter at the point of discharge into the public sewer.
7.
Any waters or wastes containing phenols or other taste or odor producing substances, in such concentrations exceeding limits which may be established by this chapter as necessary, to meet the requirements of state, federal or other public agencies.
8.
Any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by this chapter in compliance with applicable state or federal regulations.
9.
Materials which exert or cause:
a.
Unusual concentrations of inert suspended solids (such as, but not limited to, fuller's earth, lime slurries, and lime residues) or of dissolved solids (such as, but not limited to, sodium chloride and sodium sulfate).
b.
Excessive discoloration (such as, but not limited to, dye wastes and vegetable tanning solutions).
c.
Unusual BOD, CBOD5, chemical oxygen demand, nitrogen compounds, phosphorus or chlorine requirements in such flow rate and/or concentration as to constitute a significant load and/or cause interference of the POTW.
d.
Unusual volume of flow or concentration of wastes constituting "slugs" as defined herein.
e.
Excessive flows containing any of the above listed constituents and/or constituents which may cause or contribute to POTW interference.
f.
Wastewater causing, alone or in conjunction with other sources, the treatment plant's effluent to fail a toxicity test.
10.
Waters or wastes containing substances which are not amenable to treatment or reduction by the wastewater treatment process employed, or are amenable to treatment only to such degree that the wastewater treatment works effluent cannot meet the requirements of state, federal or other agencies having jurisdiction over discharge to the receiving waters.
11.
Waters or wastes that may interfere with any of the treatment works or processes of the wastewater collection and treatment system.
12.
Trucked or hauled wastes, except at discharge points designated by the superintendent in accordance with this chapter.
(Ord. 2013-24, § 1, 7/22/2013; Ord. 2021-17, § 1, 7/26/2021; Ord. 2023-24, § 1, 11/27/2023)
If any waters or wastes are discharged, or are proposed to be discharged to the public sewers, which waters contain the substances or possess the characteristics enumerated in Section 13.08.260 of this article, and which, in the judgement of the director, may have a deleterious effect upon the wastewater facilities, processes, equipment or receiving waters, or which otherwise create a hazard to life or constitute a public nuisance, the director may:
A.
Reject the wastes;
B.
Require pretreatment to an acceptable condition for discharge to the public sewers;
C.
Require control over the quantities and rates of discharge; and/or
D.
Require payment to cover the added cost of handling and treating the wastes.
(Ord. 2013-24, § 1, 7/22/2013)
If the director permits the pretreatment or equalization of waste flows, the design and installation of the plants and equipment shall be subject to the review and approval of the director, and subject to the requirements of all applicable state and federal codes, ordinances and laws.
Except where expressly authorized to do so by an applicable pretreatment standard or requirement, no industrial user 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.
(Ord. 2013-24, § 1, 7/22/2013)
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 owner at his or her expense.
(Ord. 2013-24, § 1, 7/22/2013)
Grease, oil and sand interceptors shall be required at all industrial user facilities including restaurants and all other public eating places when they are necessary for the proper handling of liquid wastes containing oil or grease in excessive amounts, or any flammable wastes, sand or other harmful ingredients; except that such interceptors shall not be required for private living quarters or dwelling units. All interceptors shall be of a type and capacity approved by the city and shall be located as to be readily and easily accessible for cleaning and inspection. In maintaining these interceptors, the person generating the wastes shall be responsible for the proper removal and disposal by appropriate means of the captured material and shall retain a maintenance log that includes at a minimum, records of the dates and means of disposal, which are subject to review by the city. Any removal and hauling of the collected materials not performed by generating user's personnel must be performed by currently licensed waste disposal firms. The director of public works shall be responsible for the enforcement of this section.
(Ord. 2013-24, § 1, 7/22/2013)
Where grease, oil and sand interceptors are required to be installed, they shall be maintained continuously in satisfactory and effective operation by the owner at his or her expense.
(Ord. 2013-24, § 1, 7/22/2013)
Any person proposing a new discharge into the system or a substantial change in the volume or character of pollutants that are being discharged into the system shall notify the director at least ninety (90) days prior to the proposed change or connection, such notification will not relieve users of liability for any expense, loss or damage to the sewer system, wastewater treatment works or treatment processes. A significant industrial user must also immediately notify the director of any changes to its facility affecting the potential for a slug discharge. In all circumstances, a permit or permit amendment shall be applied for if the director requests submittal of a permit application in response to such notifications; or if the proposed discharge or change would change the user classification as defined in this chapter; or violate any existing permit, agreement, discharge limit or other provision of this chapter. Permit applications, as determined by the director, may require the following information:
B.
Description of operations.
1.
A brief description of the nature, average rate of production (including each product produced by type, amount, processes, and rate of production), and standard industrial classifications of the operation(s) carried out by such user. This description should include a schematic process diagram, which indicates points of discharge to the POTW from the regulated processes;
2.
Types of wastes generated, and a list of all raw materials and chemicals used or stored at the facility which are, or could accidentally or intentionally be, discharged to the POTW;
3.
Number and type of employees, hours of operation, and proposed or actual hours of operation;
4.
Type and amount of raw materials processed (average and maximum per day);
5.
Site plans, floor plans, mechanical and plumbing plans, and details to show all sewers, floor drains, and appurtenances by size, location, and elevation, and all points of discharge;
C.
Time and duration of discharges.
D.
The location for monitoring all wastes covered by the permit.
E.
Flow Measurement.
1.
Information showing the measured average daily and maximum daily flow, in gallons per day, to the POTW from regulated process streams and other streams, as necessary, to allow use of the combined waste stream formula set out in 40 CFR 403.6(e);
F.
The categorical pretreatment standards applicable to each regulated process and any new categorically regulated processes for existing sources;
G.
Monitoring of Pollutants.
1.
The results of sampling and analysis identifying the nature and concentration, and/or mass, where required by the standard or by director, of regulated pollutants in the discharge from each regulated process.
2.
Instantaneous, daily maximum, and long-term average concentrations, or mass, where required. The sample shall be representative of daily operations and shall be analyzed in accordance with procedures and techniques set forth in 40 CFR Part 136 and amendments thereto, unless otherwise specified in an applicable categorical pretreatment standard. Where the standard requires compliance with a BMP or pollution prevention alternative, the user shall submit documentation as required by the director or the applicable standards to determine compliance with the standard.
3.
Sampling collected to satisfy reporting requirements must be based on data obtained through appropriate sampling and analysis performed during the period covered by the report, based on data that is representative of conditions occurring during the reporting period.
4.
Except as indicated in section a. and b. below, the user must collect wastewater samples using 24-hour flow-proportional composite sampling techniques, unless time-proportional composite sampling or grab sampling is authorized by the director. Where time-proportional composite sampling or grab sampling is authorized by the city, the samples must be representative of the discharge. Using protocols (including appropriate preservation) specified in 40 CFR Part 136 and appropriate EPA guidance, multiple grab samples collected during a 24-hour period may be composited prior to the analysis as follows: for cyanide, total phenols, and sulfides the samples may be composited in the laboratory or in the field; for volatile organics and oil and grease, the samples may be composited in the laboratory. Composite samples for other parameters unaffected by the compositing procedures as documented in approved EPA methodologies may be authorized by the city, as appropriate. In addition, grab samples may be required to show compliance with instantaneous limits.
a.
Samples for oil and grease, temperature, pH, cyanide, total phenols, sulfides, and volatile organic compounds must be obtained using grab collection techniques.
b.
For sampling required in support of baseline monitoring and ninety (90) day compliance reports required in [Section] 13.08.410(A) and (C), a minimum of four grab samples must be used for pH, cyanide, total phenols, oil and grease, sulfide, and volatile organic compounds for facilities for which historical sampling data do not exist. For facilities for which historical sampling data are available, the director may authorize a lower minimum. For the reports required in [Sections] 13.08.100, 13.08.320, and 13.08.410 of this chapter, the industrial user is required to collect the number of grab samples necessary to assess and assure compliance by with applicable pretreatment standards and requirements.
H.
Application Signatories and Certifications.
1.
All wastewater discharge permit applications, user reports, and certification statements must be signed by an authorized representative, as defined in Section 13.08.040 of this chapter, of the user and contain the certification statement set forth in Section 13.08.410(L)(1) of this chapter.
2.
If the designation of an authorized representative is no longer accurate because a different individual or position has responsibility for the overall operation of the facility or overall responsibility for environmental matters for the company, a new written authorization satisfying the authorized representative definition as set forth in Section 13.08.040 of this chapter must be submitted to director prior to or together with any reports to be signed by an authorized representative.
(Ord. 2013-24, § 1, 7/22/2013; Ord. 2023-24, § 1, 11/27/2023)
No statement contained in this chapter shall be construed as preventing any special agreement or arrangement between the city and any industrial concern whereby an industrial waste of unusual strength or character may be accepted by the city for treatment, subject to payment therefore, by the industrial concern, provided that said agreements do not contravene any requirements of existing federal and state laws and are compatible with any user charge and industrial cost recovery system in effect. Furthermore, no statement contained in this chapter shall be construed as preventing the city from enforcing more stringent requirements of EPA Categorical Pretreatment Standards and Requirements which may be promulgated nor from modifying wastewater discharge limits and requirements to assure compliance with future NPDES or RIPDES permits applied to the city wastewater treatment plant.
(Ord. 2013-24, § 1, 7/22/2013)
A.
No person shall discharge wastewater containing in excess of the allowable discharge concentrations:
Chemicals | Allowable Discharge Concentrations (12) (mg/L except where noted) | Background Concentrations (mg/L) | ||||||
|---|---|---|---|---|---|---|---|---|
Arsenic, Total | 0.022 | 0.003 | ||||||
Cadmium, Total | 0.001 | 0.012(1) | <0.0009 | |||||
Chromium, Total | 1.82 | 0.05 | ||||||
Copper, Total | 0.66 | 0.04 | ||||||
Cyanide, Total | 0.35 | <0.010 | ||||||
Lead, Total | 0.30 | 0.0064 | ||||||
Mercury, Total | 0.0009 | 0.0001 | ||||||
Nickel, Total | 0.77 | <0.005 | ||||||
Silver, Total | 0.13 | 0.0002 | ||||||
Selenium, Total | 0.001 | 0.10(1) | 0.001 | |||||
Zinc, Total | 0.71 | 0.06 | ||||||
PCBs, Total | <0.001 | <0.001 | ||||||
Total Toxic Organics | 2.13(2) | 0.009 | ||||||
Carbonaceous BOD5 (monthly average) (lbs/day) | 2,800(3) | 3,600(4) | 850(5a) | 500(6a) | 200(7) | 50(8) | 25(9) | 230 mg/L |
200(5b) | 250(6b) | |||||||
50(5c) | 125(6c) | |||||||
Total Nitrogen (as N) (Ammonia-N + Nitrite-N + Nitrate-N + Organic N) | 500 lbs/day(5a) | 40 mg/L | ||||||
250 lbs/day(5b) | ||||||||
125 lbs/day(5c) | ||||||||
94 mg/L | ||||||||
Ammonia | 90 lbs/day(5a) | — | ||||||
30 lbs/day(5b) | ||||||||
15 lbs/day(5c) | ||||||||
57 mg/L | ||||||||
Total Phosphorus | 15 lbs/day(3) | 15 lbs/day(5a) | 5 lbs/day(6a) | 5 mg/L | ||||
10 lbs/day(5b) | 2 lbs/day(6b) | |||||||
5 lbs/day(5c) | 1 lbs/day(6c) | |||||||
9.56 mg/L | ||||||||
Oil and Grease (Animal and/or Vegetable Origin) | 100 | 700(10) | — | |||||
Oil and Grease (Mineral and/or Petroleum Origin) | 25 | |||||||
pH (standard units, s.u.) | 5.5 to 10.5(11) | — | ||||||
Notes: |
|---|
The established local limits, except for those based on loading, are instantaneous maximum allowable discharge concentrations that cannot be exceeded regardless of the duration of monitoring. These limits unless otherwise noted apply to all users of the sewer system and treatment works and will be used to determine compliance with all process wastewater discharges at the end-of-pipe following pretreatment, if applicable, and prior to dilution with other waste streams. |
(1) Applicable to SIUs, in all SIC categories. |
(2) Total toxic organics (TTOs) are defined as "the summation of all quantifiable values equal to or greater than 0.001 mg/L of toxic organics as compiled in the most recent United States Environmental Protection Agency (USEPA) List of Priority Pollutants." |
(3) Applicable to Significant Industrial Users (SIU) in Standard Industrial Classification (SIC) categories of 2086-Bottle and Canned Soft Drinks. |
(4) Applicable to SIUs in SIC categories of 7213-Linen Supply; 7218-Industrial Launderers. |
(5) Applicable to SIUs in all food processing industries (SIC 2099), but not applicable to SIC 2086 (Process Wastewater Discharge Flows only). |
(5a) Large food processing industries (average daily flow-ADF > 25,000 gallons per day—GPD). |
(5b) Medium Food Processing Industries (1,000 GPD < ADF ≤ 25,000 GPD). |
(5c) All other food processing industries (ADF ≤ 1,000 GPD). |
(6) Applicable to SIUs in SIC category of 2082-Malt Beverages (process wastewater discharge flows only). |
(6a) Large Malt Beverage Industries (ADF > 4,000 GPD). |
(6b) Medium Malt Beverage Industries (2,000 GPD < ADF ≤ 4,000 GPD). |
(6c) All Other Malt Beverage Industries (ADF ≤ 2,000 GPD). |
(7) Applicable to SIUs having SIC category of 4953-Refuse Systems |
(8) Applicable to SIUs having SIC category of 4911-Electric Services. |
(9) Applicable to SIUs having SICs other than 7213, 7218, 2086, 4953, 4911 and not in a food processing industry (2099). |
(10) This specific limit is applicable only to SIUs in SIC categories of 7213 and 7218, based on the Total Oil and Grease concentration (includes animal, vegetable, mineral, and/or petroleum origins). |
(11) Wastewaters may not be discharged with pH of less than 5.5 s.u. or greater than 10.5 s.u. at any time regardless of the duration of monitoring. |
(12) All loadings will be calculated based on the Daily Flow for the day corresponding to the determination of the pollutant parameter concentrations of CBOD5, Total Nitrogen, Ammonia, and Total Phosphorus, as applicable. However, a determination of an industrial user's relevance to a specific SIC 2099 or SIC 2082 category will be based on their ADF. The ADF for SIU's will be the annual average daily flow as reported by the most current Municipal Industrial Pretreatment Program. |
B.
Limits established in this section and Article V, Section 13.08.260 of this chapter, may be modified and the volume and concentration of contributions from users may be subject to more stringent requirements by the director so that the aggregate contribution within the POTW treatment works do not cause odor problems, treatment facility effluent, air emission or sludge discharge in violation of the limits and requirements of applicable federal and state regulations.
C.
In any instance in which federal and/or state requirements or limitations are more stringent than the limitations set forth in this chapter, said requirements and limitations on discharges shall be met by all users subject to such requirements or limitations.
D.
Any industrial user which discharges or may discharge industrial wastes in excess of the above background concentrations and/or of characteristics not typical of domestic wastewaters and/or may cause interference or pass through of the POTW is subject to an industrial wastewater discharge permit issued by the city. Such permits shall include, but not be limited to, federal, state and local discharge limits.
E.
The director is authorized to establish local limits pursuant to 40 CFR 403.5(c).
(Ord. 2013-24, § 1, 7/22/2013; Ord. 2017-37, § 1, 10/23/2017; Ord. 2018-16, § 1, 6/25/2018; Ord. 2021-17, § 1, 7/26/2021; Ord. 2023-24, § 1, 11/27/2023)