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PART C. |
WASTEWATER DISCHARGE STANDARDS. |
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Section 1. |
General. The Director shall have the authority to limit volume, rate,
strength, or nature of wastewater discharge to any public sanitary sewer by any
user. Pollutants, substances, or wastewater prohibited by this subpart shall not be
processed or stored in such a manner that they could be discharged to the POTW. |
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Section 2. |
Prohibited Discharges. No person or user shall introduce into any public
sanitary sewer or into the sewerage system any pollutant which causes pass through,
interference or significant inhibition of microbial activity, nor shall
any person or user introduce any of the following into any public
sanitary sewer or the sewerage system: |
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(a) |
Any gasoline, benzene, naphtha, fuel oil, or other liquid, solid, or gas
which could potentially create a fire or explosion hazard in the
sewerage system, including, but not limited to, waste streams with a
closed cup flash point of less than 140ºF (60ºC) using the test methods
specified in 40 C.F.R. § 261.21 or which exceed a five percent lower explosive
limit (5% LEL) measured as methane. |
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(b) |
Pollutants which result in the presence of toxic gases, vapors, or fumes within the
sewerage system in a quantity that may cause acute human health and/or
safety problems. |
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(c) |
Any
discharge 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 treatment plant.
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(d) |
Any discharge having a pH less than 5.5 or greater than 10.5, unless the
Director has approved an exception under the provisions of Article 4.A.2(c). |
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(e) |
Solid or viscous substances or fats, wax, grease or oils in quantities or form
capable of obstructing the flow in sewers, or otherwise result in interference. |
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(f) |
Heat in amounts which will inhibit biological activity in the treatment works
resulting in interference, but in any case heat in such quantities that
the temperature at the POTW exceeds 104ºF (40ºC), unless the Director has approved
an exception under the provisions of Article 4.A.2(c). In no case shall the Director
approve an exception that exceeds 150ºF (65ºC). |
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(g) |
Any discharge from significant industrial users permitted under the
authority of Article 4 of this Code containing fats, wax, grease or
oils, whether emulsified or not, containing substances which may
solidify or become viscous at temperatures between 32ºF (0ºC)
and 150ºF (65ºC), and which exceed 200 mg/L, unless another numeric
limit or measurement methodology is approved by the Director under the
provisions of Article 4.A.2(c). This discharge requirement does not apply
to food service facilities as defined in Article 2 of this Code. |
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(h) |
Any petroleum oil, non-biodegradable cutting oil, or products of mineral oil
origin in amounts that will cause interference or pass through. |
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(i) |
Any silver-bearing wastewater from photo-finishing processes not treated
with a silver recovery unit prior to discharge. |
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(j) |
Any discharge containing iron, chromium, copper, zinc, and similar
objectionable or toxic substances; or wastes exerting an excessive
disinfection requirement or adversely affecting sludge disposal methods
utilized by the Unified Wastewater Districts, to such degree that any
such material measured at the source exceeds the limits established by
the Environmental Department for such materials. |
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(k) |
Any discharge of odor producing substances in concentrations exceeding the
limits which may be established by the Director as necessary, after
treatment of the composite wastewater to meet the requirements of state,
federal, or other public agencies of jurisdiction for such discharge to
the receiving waters. |
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(l) |
Any radioactive wastes or isotopes except in compliance with limits
established by the Director or in compliance with applicable state or
federal regulations. |
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(m) |
Any pollutant, including oxygen demanding pollutants, released in a
discharge at a flow rate and/or pollutant concentration which will cause
interference with a treatment facility, and/or a significant load on the
sewerage works. |
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(n) |
Any pollutant which causes excessive discoloration, such as, but not limited
to, dye wastes, vegetable tanning solutions, and water-based inks which
consequently impart color to the POTW's effluent, thereby causing it to
violate its NPDES permit. |
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(o) |
Any discharges which cause unusual volumes of flow, mass and/or
concentration of wastes constituting slug loadings. |
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(p) |
Any discharge which does not comply with the applicable categorical
pretreatment standards set out in 40 C.F.R., Chapter I, Subchapter N,
Parts 405-471, now in effect or as may later be amended. |
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(q) |
Any approved trucked or hauled wastes, except at discharge points designated
by the Unified Wastewater Districts. |
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(r) |
Storm water, surface water, ground water, roof runoff, subsurface drainage,
swimming pool drainage and non-contact cooling water, unless the
Director approves an exception under the provisions of Article 4.A.2(c). |
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(s) |
Discharge of any substance which, if otherwise disposed of, would be a hazardous
waste under 40 C.F.R. § 261, is prohibited unless the Director approves
an exception under the provisions of Article 4.A.2(c). |
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(t) |
Any discharge which, in the opinion of the Director, causes the POTW's daily
operation and maintenance schedule to be significantly disrupted. |
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Section 3. |
National Categorical Pretreatment Standards. The categorical pretreatment
standards found at 40 C.F.R. Chapter I, Subchapter N, Parts 405-471, are hereby incorporated
and made a part of this Code as if fully written out. |
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(a) |
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
C.F.R. § 403.6(c). |
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(b) |
When wastewater, subject to a categorical pretreatment standard, is mixed
with wastewater not regulated by the same standard, the Director shall
impose an alternate limit using the combined waste stream formula in 40
C.F.R. § 403.6(e). |
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(c) |
An industrial user may obtain a variance from a categorical pretreatment
standard if the user can prove, pursuant to the procedural and
substantive provisions in 40 C.F.R. § 403.13, that factors relating to
its discharge are fundamentally different from the factors considered by
EPA when developing the categorical pretreatment standard. All variances must
be obtained from the EPA. |
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(d) |
An industrial user may obtain a net gross adjustment to a categorical
standard in accordance with 40 C.F.R. § 403.15. |
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Section 4. |
Bypass. |
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(a) |
Bypass Violating Applicable Pretreatment Standards or Requirements. |
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(1) |
Bypass that violates an applicable pretreatment standard or requirement is
prohibited and the Environmental Department may take enforcement action
against an industrial user for a bypass, unless: |
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(i) |
Bypass was unavoidable to prevent loss of life, personal injury or severe
property damage; |
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(ii) |
There were no feasible alternatives to bypass, such as use of auxiliary
treatment facilities, retention of wastes or maintenance during normal
periods of equipment downtime. This condition is not satisfied if adequate
backup equipment should have been installed to prevent bypass which occurred
during normal periods of equipment downtime or preventive maintenance; and |
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(iii) |
The industrial user submitted notices as required by Article 4.C.4(b) and
approved by the Director. |
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(2) |
The Environmental Department may approve an anticipated bypass, after
considering its potential adverse effects, if the Environmental
Department determines that it will meet the three conditions listed in
Paragraph (a)(1) of this section. |
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(b) |
Notice. |
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(1) |
If an industrial user knows in advance of the need for a bypass, it shall
submit prior notice to the Environmental Department and Unified
Wastewater Districts, if possible, at least ten (10) days before the
date of the bypass. |
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(2) |
An industrial user shall notify the Environmental Department and Unified
Wastewater Districts by telephone or visit of an unanticipated bypass
that exceeds applicable pretreatment standards or requirements within
twenty-four (24) hours of becoming aware of the bypass. A written submission
shall also be provided within five (5) days of becoming aware of the bypass.
The written submission shall contain a description of the bypass and its
cause; the duration of the bypass, including exact times and dates, 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. |
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(c) |
Bypass Not Violating Applicable Pretreatment Standards or Requirements.
An industrial user may allow any bypass to occur which does not violate
pretreatment standards or requirements, but only if it also is for
essential maintenance to assure efficient operation. These
bypasses are not subject to the requirements in (a) and (b) of this section. |
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Section 5. |
Significant Contribution to Permit Violation or Prevention of Sludge Use.
No user may knowingly allow any discharge to the sewerage system which
would or does cause a violation of the NPDES permit for the POTW or
which would or does prevent the proper use or disposal of sludge derived
at the POTW. A user significantly contributes to a permit
violation or prevention of sludge use or disposal by engaging in any one
or more of the following:> |
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(a) |
Discharging a daily pollutant loading in excess of allowable limits by permit
with the Environmental Department, or by federal, state or local law; or |
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(b) |
Discharging wastewater that differs substantially in nature of constituents from the
user’s average discharge; or |
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(c) |
Knowing or having reason to know that its discharge, alone or in combination
with discharges from other sources, would result in a POTW permit
violation or prevent sewage sludge use or disposal in accordance with
all applicable regulations as they apply to the POTW’s selected method
of sludge management. |
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Section 6. |
Local Limits. |
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[Reserved] |
