The following is excerpted from the Johnson County Code of Regulations for
Sanitary Sewer Use, 2003 Edition:
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ARTICLE 4 PRETREATMENT |
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PART C. PRETREATMENT 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. |
