(a) 
General prohibitions.
No user shall introduce or cause to be introduced into the POTW any pollutant or wastewater which causes pass-through or interface [interference]. These general prohibitions apply to all users of the POTW regardless of whether they are subject to categorical pretreatment standards or any other national, state, or local pretreatment standards or requirements.
(b) 
Specific prohibitions.
No user shall introduce or cause to be introduced into the POTW the following pollutants, substances or wastewater:
(1) 
Pollutants which 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 methods specified in 40 CFR 261.21;
(2) 
Wastewater having a pH less than 5.0 or more than 12.0, or otherwise causing corrosive or structural damage to the POTW or equipment;
(3) 
Solid or viscous substances in amounts which will cause obstruction of the flow in the POTW resulting in interference, but in no case solids greater than one-half inch in any dimension;
(4) 
Oil and grease:
(A) 
Petroleum oil, nonbiodegradable cutting oil, or non-polar products of mineral oil origin in concentrations greater than 200 mg/l;
(B) 
Visible free floatable polar oils, fats, or grease in wastewater discharged from industrial or commercial facilities into the POTW;
(C) 
In no case shall discharges in amounts that cause interference or operational problems with the POTW be allowed;
(5) 
Pollutants, including oxygen-demanding pollutants (BOD, etc.), released in a discharge at a flow rate and/or pollutant concentration which, either singly or by interaction with other pollutants, will cause interference with the POTW;
(6) 
Wastewater having a temperature greater than 150 degrees Fahrenheit (65 degrees Celsius), or which will inhibit biological activity in the treatment plant resulting in interference, but in no case wastewater which causes the temperature at the introduction into the treatment plant to exceed 104 degrees Fahrenheit (40 degrees Celsius);
(7) 
Petroleum oil, nonbiodegradable cutting oil or products of mineral oil origin, in amounts that will cause interference or pass-through;
(8) 
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;
(9) 
Trucked or hauled industrial waste, except as approved in writing by the director;
(10) 
Noxious or malodorous liquids, gases, solids, or other wastewater which, either singly or by interaction with other wastes, is sufficient to create a public nuisance or a hazard to life, or to prevent entry into the sewers for maintenance or repair;
(11) 
Hydrogen sulfide, sulfur dioxide or nitrous oxide in excess of ten parts per million in water;
(12) 
Wastewater which imparts color which cannot be removed by the treatment process, such as, but not limited to, dye wastes and vegetable tanning solutions;
(13) 
Wastewater containing any radioactive wastes or isotopes except in compliance with applicable state or federal regulations;
(14) 
Stormwater, surface water, groundwater, artesian well water, roof runoff, subsurface drainage, condensate, deionized water, noncontact cooling water and unpolluted wastewater, unless specifically authorized by the director;
(15) 
Sludges, screenings or other residues from the pretreatment of industrial wastes;
(16) 
Medical wastes, except as specifically authorized by the director in a wastewater discharge permit;
(17) 
Wastewater causing, alone or in conjunction with other sources, the treatment plant’s effluent to fail a toxicity test;
(18) 
Detergents, surface-active agents, or other substances which may cause excessive foaming in the POTW; or
(19) 
Swimming pool drainage from private residential pools. Swimming pool drainage from public and semi-public swimming pools may be discharged to the POTW with the prior consent of the director. Swimming pool filter backwash may be discharged to the POTW;
(20) 
BTEX concentration greater than 1.0 mg/l.
(c) 
Categorical pretreatment standards.
The categorical pretreatment standards found at 40 CFR chapter I, subchapter N, parts 405–471 are hereby incorporated into this division. A user shall not discharge in violation of categorical pretreatment standards.
(1) 
Where a categorical pretreatment standard is expressed only in terms of either the mass or the concentration of a pollutant in wastewater, the director may impose equivalent concentration or mass limits in accordance with 40 CFR 403.6(c).
(2) 
When regulated process wastewater subject to a categorical pretreatment standard is mixed with nonregulated wastewaters prior to treatment, the director or the industrial user, with the written concurrence of the director, shall derive fixed alternative discharge limits in accordance with procedures and the combined wastestream formula found in 40 CFR 406.3(e) or by a flow weighted average.
(3) 
A user may obtain a variance from a categorical pretreatment standard if the user can demonstrate, pursuant to the procedural and substantive provisions in 40 CFR 403.13, that factors relating to its discharge are fundamentally different from the factors considered by the EPA when developing the categorical pretreatment standard.
(d) 
Local limits.
The following pollutant limits are established to protect against pass-through and interference. The limits apply at the point where the wastewater is discharged to the POTW. The director may impose mass limitations in addition to, or in place of, the concentration-based limitations. All concentrations for metallic substances are for total metal unless indicated otherwise. No person shall discharge wastewater containing pollutants in the form of compounds or elements with total concentrations exceeding the following:
Pollutant
Maximum Allowable Discharge Limit
(mg/l)
Arsenic
0.25
Cadmium
0.15
Chromium
5.0
Copper
4.0
Lead
2.9
Mercury
0.01
Nickel
2.0
Silver
1.0
Zinc
5.0
Cyanide or cyanogens compounds
(expressed as total CN-)
1.0
(e) 
A person commits an offense if with criminal negligence the person processes or stores pollutants, substances, or wastewater prohibited by this section in such a manner that they could be discharged to the POTW.
(1998 Code, sec. 113-80; Ordinance 2011-05-004, sec. 2 (113-80), adopted 6/21/11; 2013 Code, sec. 48-218)
(a) 
General prohibitions.
No user shall introduce or cause to be introduced into the POTW any pollutant or wastewater which causes pass-through or interface [interference]. These general prohibitions apply to all users of the POTW regardless of whether they are subject to categorical pretreatment standards or any other national, state or local pretreatment standards or requirements.
(b) 
Specific prohibitions.
No user shall introduce or cause to be introduced into the POTW the following pollutants, substances or wastewater:
(1) 
Pollutants which 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 methods specified in 40 CFR 261.21;
(2) 
Wastewater having a pH less than 5.5 or more than 11.0, or otherwise causing corrosive or structural damage to the POTW or equipment;
(3) 
Solid or viscous substances in amounts which will cause obstruction of the flow in the POTW resulting in interference, but in no case solids greater than one-half inch in any dimension or fats, oil and grease measured as total oil and grease in excess of 200 mg/l;
(4) 
Pollutants, including oxygen-demanding pollutants (BOD, etc.), released in a discharge at a flow rate and/or pollutant concentration which, either singly or by interaction with other pollutants, will cause interference with the POTW;
(5) 
Wastewater having a temperature greater than 150 degrees Fahrenheit (65 degrees Celsius), or which will inhibit biological activity in the treatment plant resulting in interference, but in no case wastewater which causes the temperature at the introduction into the treatment plant to exceed 104 degrees Fahrenheit (40 degrees Celsius);
(6) 
Petroleum oil, nonbiodegradable cutting oil or products of mineral oil origin, in amounts that will cause interference or pass-through;
(7) 
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;
(8) 
Trucked or hauled waste except as discharge points designated by the director;
(9) 
Noxious or malodorous liquids, gases, solids or other wastewater which, either singly or by interaction with other wastes, is sufficient to create a public nuisance or a hazard to life, or to prevent entry into the sewers for maintenance or repair; hydrogen sulfide, sulfur dioxide or nitrous oxide in excess of ten parts per million;
(10) 
Wastewater which imparts color which cannot be removed by the treatment process, such as, but not limited to, dye wastes and vegetable tanning solutions;
(11) 
Wastewater containing any radioactive wastes or isotopes except in compliance with applicable state or federal regulations;
(12) 
Stormwater, surface water, groundwater, artesian well water, roof runoff, subsurface drainage, condensate, deionized water, noncontact cooling water, and unpolluted wastewater, unless specifically authorized by the director;
(13) 
Sludges, screenings, or other residues from the pretreatment of industrial wastes;
(14) 
Medical wastes, except as specifically authorized by the director in a wastewater discharge permit;
(15) 
Wastewater causing, alone or in conjunction with other sources, the treatment plant’s effluent to fail a toxicity test; total toxic organics in excess of 2.13 mg/l collected as a grab sample;
(16) 
Detergents, surface-active agents, or other substances which may cause excessive foaming in the POTW; or
(17) 
Swimming pool drainage from private residential pools. Swimming pool drainage from public and semi-public swimming pools may be discharged to the POTW with the prior consent of the director. Swimming pool filter backwash may be discharged to the POTW.
(c) 
Categorical pretreatment standards.
The categorical pretreatment standards found at 40 CFR chapter I, subchapter N, parts 405–471 are hereby incorporated into this division. A user shall not discharge in violation of categorical pretreatment standards.
(1) 
Where a categorical pretreatment standard is expressed only in terms of either the mass or the concentration of a pollutant in wastewater, the director may impose equivalent concentration or mass limits in accordance with 40 CFR 403.6(c).
(2) 
When regulated process wastewater subject to a categorical pretreatment standard is mixed with nonregulated wastewaters prior to treatment, the director or the industrial user, with the written concurrence of the director, shall derive fixed alternative discharge limits in accordance with procedures and the combined wastestream formula found in 40 CFR 406.3(e) or by a flow weighted average.
(3) 
A user may obtain a variance from a categorical pretreatment standard if the user can demonstrate, pursuant to the procedural and substantive provisions in 40 CFR 403.13, that factors relating to its discharge are fundamentally different from the factors considered by the EPA when developing the categorical pretreatment standard.
(4) 
A user may obtain a net gross adjustment to a categorical pretreatment standard in accordance with 40 CFR 403.15.
(d) 
Local limits.
The following local pollutant limits are established to protect against pass-through and interference. The limits apply at the point where the wastewater is discharged to the POTW. The director may impose mass limitations in addition to, or in place of, the concentration-based limitations. All concentrations for metallic substances are for total metal unless indicated otherwise. No person shall discharge wastewater containing pollutants in the form of compounds or elements with total concentrations exceeding the following:
Pollutant
Maximum Allowable Discharge Limit
(mg/l)
Arsenic
0.1
Barium
2.0
Cadmium
0.1
Chromium
3.5
Copper
2.5
Lead
2.0
Manganese
3.5
Mercury
0.008
Molybdenum
TBA
Nickel
1.5
Selenium
0.05
Silver
0.25
Zinc
2.5
Cyanide or cyanogens compounds
(expressed as total CN-)
1.0
(e) 
Offenses.
A person commits an offense if with criminal negligence the person processes or stores pollutants, substances, or wastewater prohibited by this section in such a manner that they could be discharged to the POTW.
(1998 Code, sec. 113-81; Ordinance 2011-05-004, sec. 2 (113-81), adopted 6/21/11; 2013 Code, sec. 48-219)
(a) 
General prohibitions.
No user shall introduce or cause to be introduced into the POTW any pollutant or wastewater which causes pass-through or interface [interference]. These general prohibitions apply to all uses of the POTW regardless of whether they are subject to categorical pretreatment standards or any other national, state, or local pretreatment standards or requirements.
(b) 
Specific prohibitions.
No user shall introduce or cause to be introduced into the POTW the following pollutants, substances, or wastewater:
(1) 
Pollutants which 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 methods specified in 40 CFR 261.21;
(2) 
Wastewater having a pH less than 6.0 or more than 10.0, or otherwise causing corrosive or structural damage to the POTW or equipment;
(3) 
Solid or viscous substances in amounts which will cause obstruction of the flow in the POTW resulting in interference, but in no case solids greater than one-half inch in any dimension or fats, oil and grease measured as total oil and grease in excess of 100 mg/l;
(4) 
Pollutants, including oxygen-demanding pollutants (BOD, etc.), released in a discharge at a flow rate and/or pollutant concentration which, either singly or by interaction with other pollutants, will cause interference with the POTW; biochemical oxygen demand (five-day) in excess of 250 mg/l (surcharge limit only), or total suspended solids in excess of 250 mg/l (surcharge limit only);
(5) 
Wastewater having a temperature greater than 150 degrees Fahrenheit (65 degrees Celsius), or which will inhibit biological activity in the treatment plant resulting in interference, but in no case wastewater which causes the temperature at the introduction into the treatment plant to exceed 104 degrees Fahrenheit (40 degrees Celsius);
(6) 
Petroleum oil, nonbiodegradable cutting oil or products of mineral oil origin, in amounts that will cause interference or pass-through;
(7) 
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;
(8) 
Trucked or hauled industrial waste, except as approved in writing by the director;
(9) 
Noxious or malodorous liquids, gases, solids or other wastewater which, either singly or by interaction with other wastes, are sufficient to create a public nuisance or a hazard to life, or to prevent entry into the sewers for maintenance or repair;
(10) 
Hydrogen sulfide, sulfur dioxide or nitrous oxide in excess of ten parts per million in water;
(11) 
Wastewater which imparts color which cannot be removed by the treatment process, such as, but not limited to, dye wastes and vegetable tanning solutions;
(12) 
Wastewater containing any radioactive wastes or isotopes except in compliance with applicable state or federal regulations;
(13) 
Stormwater, surface water, groundwater, artesian well water, roof runoff, subsurface drainage, condensate, deionized water, noncontact cooling water and unpolluted wastewater, unless specifically authorized by the director;
(14) 
Sludges, screenings or other residues from the pretreatment of industrial wastes;
(15) 
Medical wastes, except as specifically authorized by the director in a wastewater discharge permit;
(16) 
Wastewater causing, alone or in conjunction with other sources, the treatment plant’s effluent to fail a toxicity test; total toxic organics in excess of 1.0 mg/l collected as a grab sample;
(17) 
Detergents, surface-active agents or other substances which may cause excessive foaming in the POTW; or
(18) 
Swimming pool drainage from private residential pools. Swimming pool drainage from public and semi-public swimming pools may be discharged to the POTW with the prior consent of the director. Swimming pool filter backwash may be discharged to the POTW.
(c) 
Categorical pretreatment standards.
The categorical pretreatment standards found at 40 CFR chapter I, subchapter N, parts 405–471 are hereby incorporated into this division. A user shall not discharge in violation of categorical pretreatment standards.
(1) 
Where a categorical pretreatment standard is expressed only in terms of either the mass or the concentration of a pollutant in wastewater, the director may impose equivalent concentration or mass limits in accordance with 40 CFR 403.6(c).
(2) 
When regulated process wastewater subject to a categorical pretreatment standard is mixed with nonregulated wastewaters prior to treatment, the director or the industrial user, with the written concurrence of the director, shall derive fixed alternative discharge limits in accordance with procedures and the combined wastestream formula found in 40 CFR 406.3(e) or by a flow weighted average.
(3) 
A user may obtain a variance from a categorical pretreatment standard if the user can demonstrate, pursuant to the procedural and substantive provisions in 40 CFR 403.13, that factors relating to its discharge are fundamentally different from the factors considered by the EPA when developing the categorical pretreatment standard.
(4) 
A user may obtain a net gross adjustment to a categorical standard in accordance with 40 CFR 403.15.
(d) 
Local limits.
The following pollutant limits are established to protect against pass-through and interference. The limits apply at the point where the wastewater is discharged to the POTW. The director may impose mass limitations in addition to, or in place of, the concentration-based limitations. All concentrations for metallic substances are for total metal unless indicated otherwise. No person shall discharge wastewater containing pollutants in the form of compounds or elements with total concentrations exceeding the following:
Pollutant
Max. Allowable Discharge Limit
(mg/l)
Arsenic
0.1
Barium
1.0
Cadmium
0.1
Chromium
1.0
Copper
1.5
Lead
1.0
Mercury
0.005
Nickel
1.0
Selenium
0.05
Silver
0.1
Zinc
2.0
Cyanide or cyanogens compounds
(expressed as total CN-)
1.0
(e) 
Offenses.
A person commits an offense if with criminal negligence the person processes or stores pollutants, substances, or wastewater prohibited by this section in such a manner that they could be discharged to the POTW.
(1998 Code, sec. 113-82; Ordinance 2011-05-004, sec. 2 (113-82), adopted 6/21/11; 2013 Code, sec. 48-220)
The city reserves the right to establish, by ordinance or in wastewater discharge permits, more stringent standards or requirements on discharges to the POTW than those set forth in section 7.07.243.
(1998 Code, sec. 113-83; Ordinance 2011-05-004, sec. 2 (113-83), adopted 6/21/11; 2013 Code, sec. 48-221)
(a) 
No user shall ever increase the use of process water, or in any way attempt to dilute a discharge, as a partial or complete substitute for adequate treatment to achieve compliance with a discharge limitation unless expressly authorized by an applicable pretreatment standard or requirement.
(b) 
The director may impose mass limitations on users who are using dilution to meet applicable pretreatment standards or requirements, or in other cases when the imposition of mass limitations is appropriate.
(1998 Code, sec. 113-84; Ordinance 2011-05-004, sec. 2 (113-84), adopted 6/21/11; 2013 Code, sec. 48-222)
When upset occurs, a user shall control production of all discharges to the extent necessary to maintain compliance with categorical pretreatment standards upon reduction, loss or failure of its treatment equipment until the equipment is restored or an alternative method of treatment is provided. This requirement applies in the situation where, among other things, the primary source of power of the treatment equipment is reduced, lost or fails.
(1998 Code, sec. 113-85; Ordinance 2011-05-004, sec. 2 (113-85), adopted 6/21/11; 2013 Code, sec. 48-223)
(a) 
A user may allow any bypass to occur which does not cause pretreatment standards or requirements to be violated, but only if it is for essential maintenance to ensure efficient operation. These bypasses are not subject to the provisions of subsections (b) and (c) of this section.
(b) 
Advance notice of need for bypass.
(1) 
If a user knows in advance of the need for a bypass, it shall submit prior notice to the director, at least ten days before the date of the bypass, if possible.
(2) 
A user shall submit oral notice to the director of an unanticipated bypass that exceeds applicable pretreatment standards within 24 hours from the time it becomes aware of the bypass. A written submission shall also be provided within five days of the time the user becomes aware of the bypass. The written submission shall contain a description of the bypass and its cause; the duration of the bypass, including exact dates and times, and, if the bypass has not been corrected, the anticipated time it is expected to continue; and steps taken or planned to reduce, eliminate, and prevent reoccurrence of the bypass. The director may waive the written report on a case-by-case basis if the oral report has been received within 24 hours.
(c) 
Bypass is prohibited, and the director may take an enforcement action against a user for a bypass, unless:
(1) 
Bypass was unavoidable to prevent loss of life, personal injury, or severe property damage;
(2) 
There were no feasible alternatives to the bypass, such as the use of auxiliary treatment facilities, retention of untreated wastes, or maintenance during normal periods of equipment downtime. This condition is not satisfied if adequate back-up equipment should have been installed in the exercise of reasonable engineering judgment to prevent a bypass which occurred during normal periods of equipment downtime or preventive maintenance; and
(3) 
The user submitted notices as required under subsection (b) of this section.
(d) 
The director may approve an anticipated bypass, after considering its adverse effects, if the director determines that it will meet the three conditions listed in subsection (c) of this section.
(1998 Code, sec. 113-86; Ordinance 2011-05-004, sec. 2 (113-86), adopted 6/21/11; 2013 Code, sec. 48-224)
Any person found violating any portion of this division, in part or in whole, shall be subject to enforcement actions as stated in division 4 of this article.
(1998 Code, sec. 113-87; Ordinance 2011-05-004, sec. 2 (113-87), adopted 6/21/11; 2013 Code, sec. 48-225)