A. 
General prohibitions. No industrial user shall introduce to the POTW any pollutant which causes pass through or interference. These general prohibitions apply to all industrial users of the POTW whether they are subject to pretreatment standards, or any other national, state, or local pretreatment requirements.
B. 
Specific prohibitions. No industrial user shall introduce or cause to be introduced to the POTW the following substances or combination of substances:
1. 
Any substance which either alone or by interaction with other substances create a fire or explosive hazard in the POTW, including, but not limited to wastestreams with a closed-cup flashpoint of less than 140 degrees Fahrenheit (60 degrees Celsius) using the test method specified in 40 CFR Section 261.21. The discharge restrictions and prohibitions of dangerous waste regulations set forth in Chapter 173-303 WAC shall apply to discharges under this chapter;
2. 
Wastewater having a pH of less than 5.0, or more than 11.0, or any wastewater capable of causing corrosive structural damage to the POTW or equipment except as authorized by an industrial wastewater discharge permit, special approved discharge authorization, or other control mechanism issued by the Control Authority;
3. 
Solid or viscous pollutants or substances in amounts which cause obstruction to the flow in the POTW or other interference;
4. 
Petroleum oil, nonbiodegradable cutting oil, or products of mineral oil origin, in amounts that will cause pass through or interference;
5. 
Any pollutant, including oxygen-demanding pollutants released in a discharge at a flow rate and/or concentration which will cause interference;
6. 
Wastewater entering the POTW that exceeds 100 degrees Fahrenheit. The Control Authority may authorize a discharge above 100 degrees Fahrenheit if it determines such discharge will not cause interference or influent temperature at the POTW treatment plant to exceed 104 degrees Fahrenheit.
7. 
Pollutants which result in the presence of toxic gases, vapors or fumes within the POTW in a quantity which may cause acute worker health and safety problems or pollutants which alone or in combination with other pollutants, or by interaction with other wastes, are sufficient to create a public nuisance or hazard to life or are sufficient to prevent or interfere with entry into the POTW for maintenance and repair;
8. 
Trucked or hauled pollutants, except at discharge points as authorized by an industrial wastewater discharge permit, special approved discharge authorization, or other control mechanism issued by the Control Authority, as set forth in this chapter;
9. 
Wastewater which contains grease or oil or any other substances that will solidify or become discernibly viscous at temperatures between thirty-two degrees (32°) Fahrenheit (0° Celsius) and one hundred fifty degrees (150°) Fahrenheit (65.5° Celsius);
10. 
Wastewater generated as a result of wastes pumped from gravity grease interceptors, hydromechanical grease interceptors or grease traps, sand-oil separators or other storage tanks or treatment units without the approval of the Control Authority;
11. 
Wastewater which imparts color to the POTW’s effluent such as, but not limited to, dye wastes and vegetable tanning solutions;
12. 
Wastewater containing radioactive wastes or isotopes except in compliance with applicable state or federal regulations;
13. 
Medical wastes that cause or contribute to pass through or interference;
14. 
Unless approved by the Control Authority under extraordinary circumstances, such as lack of direct discharge alternatives or need to augment sewage flows due to septic conditions (as required under WAC 173-216-050):
a. 
Non-contact cooling water in significant volumes;
b. 
Stormwater or other direct inflow sources; and
c. 
Wastewater significantly affecting system hydraulic loading, which does not require treatment or would not be afforded a significant degree of treatment by the POTW;
15. 
Any substance that causes the City to violate its NPDES Permit(s) or applicable federal or state water quality standards;
16. 
Sludge, screenings, or other residues from the pretreatment of industrial wastes or from industrial processes except as authorized by an industrial wastewater discharge permit, special approved discharge authorization or other control mechanism issued by the Control Authority;
17. 
Any slug discharge;
18. 
Any substance which may cause the POTW’s effluent or treatment residues, sludge or sludge products or scums, to be unsuitable for reclamation or reuse, or which otherwise interferes with the reclamation process;
19. 
Any discharge containing a substance which is regulated under Chapter 173-303 WAC, unless authorized by an industrial wastewater discharge permit, special approved discharge authorization or other control mechanism issued by the Control Authority. Control mechanisms issued under this subsection shall comply with applicable discharge requirements set forth in Chapter 173-303 WAC; and
20. 
Any pesticides, herbicides or fungicides that cause or contribute to pass through, interference or negative impact to the POTW. Industrial users shall not discharge wastewater to the POTW that is generated from the rinsing of any container that contains or contained any concentrated or formulated pesticide, herbicide or fungicide unless approved by the Control Authority.
C. 
Hazardous waste pharmaceuticals. Healthcare facilities that generate, accumulate or otherwise handle hazardous waste pharmaceuticals, and reverse distributors engaged in the management of prescription hazardous waste pharmaceuticals, shall not discharge pharmaceuticals to the POTW which are listed as hazardous waste under the federal Resource Conservation and Recovery Act (42 U.S.C. § 6901 et seq., and its implementing regulations), or which are regulated as hazardous waste under the same law based on the characteristics of ignitability, corrosivity, reactivity, or toxicity.
D. 
Storage. No chemicals, materials, or other substances, including but not limited to, paints, solvents, boiler or water treatment chemicals, sludges, chemicals, or wastes shall be stored in proximity to a floor drain or other openings used to collect and convey, directly or indirectly, wastewater to the POTW unless secondary containment is provided. The requirement for secondary containment is waived if physical barriers exist that will prevent entry of chemicals, materials or other substances to floor drains or other openings used to collect and convey wastewater.
E. 
Dilution prohibited. Dilution is prohibited as a substitute for wastewater treatment except where authorized 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. The Control Authority may impose mass limitations on industrial users which are using dilution to meet applicable pretreatment standards or requirements, or in other cases where the imposition of mass limitations is appropriate.
F. 
Local limits.
1. 
No industrial user issued an industrial wastewater discharge permit shall discharge, or cause to be discharged, wastewater containing pollutants that exceed the following limits:
Table 12.08C.100F - 1
Pollutant
Daily Maximum Discharge Limits(a) for IUs discharging to Central Treatment Plant
Daily Maximum Discharge Limits(a) for IUs discharging to North End Treatment Plant
Arsenic
0.23
0.56
Cadmium
0.103
0.251
Chromium
4.74
4.54
Copper
1.46
2.27
Lead
0.427
1.20
Mercury
0.033
0.097
Molybdenum
0.55
1.46
Nickel
1.12
2.79
Selenium
0.14
0.437
Silver
0.64
1.55
Zinc
2.44
5.54
5-Day Biochemical Oxygen Demand (BOD5), lbs/day(b)
No Limit
449
Total Suspended Solids (TSS), lbs/day(b)
No Limit
2153
Ammonia, lbs/day(b)
5,082.6
No Limit
Bis-2(ethylhexyl)phthalate
No Limit
<0.0005
(a)
All Pollutants as Total and in mg/L unless otherwise specified.
(b)
This limit is the total mass in pounds per day (lbs/day) that are available to allocate to all significant industrial users and other designated and permitted non-significant industrial users.
G. 
The Control Authority may implement local limits through allocation of the Maximum Allowable Industrial Load to significant industrial users and specific permitted non-significant industrial users that correspond to the uniform concentration local limits shown in Table 12.08C.100F - 1.
H. 
The following limits shall apply to wastewaters that are discharged from:
1. 
Groundwater cleanup of petroleum or gasoline underground storage tanks or other remediation wastewaters containing these pollutants;
2. 
Discharges where one or more of these pollutants are present; or
3. 
Where these pollutants are appropriate surrogates.
It shall be unlawful for any industrial user to discharge or cause to be discharged any waste or wastewater to the POTW that exceeds the following limits:
Table 12.08C.100H - 1
Pollutant
Daily Maximum Limit (mg/L)
Benzene
0.050
BTEX
0.750
I. 
The Control Authority may establish more stringent pollutant limits, additional site-specific pollutant limits, best management practices, or additional pretreatment requirements when, in the judgment of the Control Authority, such limitations, practices or requirements are reasonably necessary to ensure compliance with the provisions of this chapter.
(Ord. 28761 Ex. C, 2021-05-25)
A. 
Industrial users shall comply with the categorical pretreatment standard(s) found at 40 CFR Chapter I, Subchapter N, Parts 405-471.
B. 
Where a categorical pretreatment standard is expressed only in terms of either the mass or the concentration of a pollutant in wastewater, the Control Authority may impose equivalent concentration or mass limits in accordance with this section and 40 CFR Part 403.6(c).
C. 
When categorical pretreatment standards are expressed only in terms of a mass of pollutant per unit of production, the Control Authority may convert the limits to equivalent limitations expressed either as mass of pollutant discharged per day or effluent concentration when calculating effluent limitations applicable to individual industrial users. The industrial user shall supply appropriate actual or projected long-term production rates for the unit of production specified in order to facilitate this process pursuant to 40 Part CFR 403.6(c)(2), as required by the Control Authority.
D. 
The Control Authority may allow wastewater subject to a categorical pretreatment standard to be mixed with other wastewaters prior to treatment. In such cases, the industrial user shall identify all categorically regulated wastestreams and provide sufficient information for each non-categorical wastestream to determine whether it should be considered dilute for each pollutant. In such situations, the Control Authority shall apply the appropriate formula as found at 40 CFR Part 403.6(e) to determine appropriate limits.
E. 
Equivalent mass limits.
1. 
When a categorical pretreatment standard is expressed only in terms of pollutant concentrations, an industrial user may request that the Control Authority convert the limits to equivalent mass limits. The determination to convert concentration limits to mass limits is within the discretion of the Control Authority. The Control Authority may establish equivalent mass limits if the industrial user meets all of the following conditions:
a. 
Employ, or demonstrate that it will employ, water conservation methods and technologies that substantially reduce water use during the term of its control mechanism;
b. 
Currently use control and treatment technologies adequate to achieve compliance with the applicable categorical pretreatment standard, and not have used dilution as a substitute for treatment;
c. 
Provide sufficient information to establish the facility’s actual average daily flow rate for all wastestreams, based on data from a continuous effluent flow monitoring device, as well as the facility’s long-term average production rate. Both the actual average daily flow rate and the long-term average production rate must be representative of current operating conditions;
d. 
Not have daily flow rates, production levels, or pollutant levels that vary so significantly that, in the judgement of the Control Authority, are not appropriate for application of equivalent mass limits; and
e. 
Demonstrate that it has consistently complied with all applicable categorical pretreatment standards during the period prior to the industrial user’s request for equivalent mass limits.
2. 
An industrial user subject to equivalent mass limits shall:
a. 
Maintain and effectively operate control and treatment technologies adequate to achieve compliance with the equivalent mass limits;
b. 
Continue to record the facility’s flow rates by a continuous effluent flow monitoring device;
c. 
Continue to record the facility’s production rates;
d. 
Notify the Control Authority if production rates are expected to vary by more than twenty percent (20%) from the submitted baseline production rates. The Control Authority may reassess and revise equivalent limits as necessary to reflect changed conditions; and
e. 
Continue to employ the same or comparable water conservation methods and technologies so long as it discharges under its equivalent mass limit.
3. 
Equivalent mass limits:
a. 
Shall not exceed the product of the actual average daily flow rate of the regulated process(es) of the industrial user and the applicable concentration-based daily maximum and monthly average standards (and the appropriate unit conversion factor);
b. 
Shall, upon notification of a revised production rate, be reassessed and recalculated as necessary to reflect changed conditions at the facility; and
c. 
May be retained in subsequent industrial wastewater discharge permits if the industrial user’s actual average daily flow rate was reduced solely as a result of the implementation of water conservation methods and technologies, and the actual average daily flow rates used in the original calculation of the equivalent mass limit were not based on the use of dilution as a substitute for treatment pursuant to TMC § 12.08C.100E. The industrial user shall also be in compliance with 40 CFR Section 403.17.
F. 
The Control Authority may convert the mass limits of the categorical pretreatment standards at 40 CFR parts 414, 419, and 455 to concentration limits for purposes of calculating limitations applicable to individual industrial users. When converting such limits to concentration limits, the Control Authority must use the concentrations listed in the applicable subparts of 40 CFR parts 414, 419, and 455 and document that dilution is not being substituted for treatment as prohibited by this chapter.
G. 
Equivalent limitations are deemed pretreatment standards for the purposes of this chapter and Section 307(d) of the Federal Clean Water Act. The Control Authority must document how the equivalent limits were derived and make this information publicly available. Once incorporated into its industrial wastewater discharge permit, an industrial user shall comply with the equivalent limitations in lieu of the promulgated categorical standards from which the equivalent limitations were derived.
H. 
When a categorical pretreatment standard specifies one limit for calculating maximum daily discharge limitations and a second limit for calculating maximum monthly average, or 4-day average, the same production or flow figure shall be used in calculating both the average and the maximum equivalent limitation.
I. 
Any industrial user operating under an industrial wastewater discharge permit that incorporates equivalent mass or concentration limits calculated from a production-based standard shall notify the Control Authority within two (2) business days after the industrial user has a reasonable basis to know that the production level will significantly change within the next calendar month. Any industrial user that fails to notify the Control Authority of such anticipated change will be required to meet the mass or concentration limits in its control mechanism that were based on the original estimate of the long-term average production rate.
(Ord. 28761 Ex. C, 2021-05-25)
A. 
All pollutants discharged from a commercial or industrial operation to the POTW shall satisfy all applicable requirements set forth in Chapter 173-216 WAC.
B. 
Any person who constructs or modifies or proposes to construct or modify wastewater treatment facilities shall comply with the submittal requirements set forth in Chapter 173-240 WAC. No person may commence construction or modification of a wastewater treatment facility covered under Chapter 173-340 WAC without first submitting engineering reports and plans and specifications to the Control Authority for its review and written acceptance. The City, acting through the Control Authority, is authorized as a delegated unit of local government under RCW 90.48.110(2) to review such submittals.
C. 
Industrial users shall apply to the Control Authority for an industrial wastewater discharge permit at least ninety (90) days prior to the discharge of any pollutants other than domestic wastewater, or wastewater the Control Authority has determined to be similar in character and strength to domestic wastewater, and that there is no potential for such discharge to adversely affect the POTW.
D. 
All significant industrial users shall apply for, obtain, and maintain compliance with, an industrial wastewater discharge permit from the Control Authority, or approval of the Control Authority of a transfer of an existing permit to the industrial user, prior to discharging pollutants.
E. 
Claims of confidentiality shall be governed by TMC § 12.08C.910.
F. 
Applicants for a new industrial wastewater discharge permit, or permit reissuance or modification, which allows a new or increased pollutant loading shall publish notice for each application in the format provided by the Control Authority, and in accordance with the public notice requirements set forth in TMC § 12.08C.470.
G. 
The Control Authority may require the applicant to also mail this public notice to persons who have expressed an interest in being notified, and to state agencies and local governments with a regulatory interest, and to post the public notice on the facility. If the Control Authority determines there is sufficient public interest, it will hold a public meeting following the requirements of WAC 173-216-100. The Control Authority may, in its discretion, assume responsibility for public notice requirements for any applicant, and may waive the requirements of this section for any industrial user who is not classified as a significant industrial user.
H. 
Discharge restrictions set forth in Chapter 173-303 WAC (Dangerous Waste) shall apply to all industrial users.
I. 
All required monitoring data shall be analyzed by a laboratory registered or accredited under the provisions of Chapter 173-50 WAC, except for flow, temperature, settleable solids, conductivity, pH, turbidity, and internal process control parameters. However, if the laboratory analyzing samples for conductivity, pH, or turbidity must otherwise be accredited, it shall also be accredited for these parameters.
(Ord. 28761 Ex. C, 2021-05-25)
Industrial users shall apply all known, available, and reasonable methods of prevention, control and treatment to wastewater discharges as required by Chapter 90.48 RCW.
(Ord. 28761 Ex. C, 2021-05-25)
Any person whose activities may, in the judgement of the Control Authority, be a source of nondomestic wastewater to the POTW shall, upon request of the Control Authority, complete and submit an industrial user survey form. Industrial users who seek to modify or increase an existing discharge of a nondomestic waste stream to the POTW shall submit an updated industrial user survey form to the Control Authority prior to modifying or increasing its discharge. Accurate completion of the industrial user survey form is a condition of initial and continued discharge to the POTW. Information contained within the industrial user survey form shall be used by the Control Authority to categorize a business operation and determine the proper level of regulation under this chapter, including whether an industrial user is a significant industrial user. Failure to comply with this section is a violation of this chapter subject to the enforcement provisions of TMC § 12.08C.1200.
(Ord. 28761 Ex. C, 2021-05-25)