Fats, oils, and grease (FOG) and sand interceptors shall be
provided when, in the opinion of the Director, they are necessary
for the proper handling of liquid wastes containing fat, oil, or grease
discharges in which the concentration in a grab sample exceeds 100
mg/l limit, or any flammable wastes, sand, or other harmful ingredients,
except that such interceptors shall not be required for single-family
or multiple-family dwelling units. All interceptors shall be of a
type and capacity approved by the Director and shall be located as
to be readily and easily accessible for cleaning and inspection. Grease
and oil interceptors shall be constructed of impervious materials
capable of withstanding abrupt and extreme changes in temperature.
They shall be of substantial construction, watertight and equipped
with easily removable covers which when bolted into place shall be
gastight and watertight. When installed, all fats, oils and grease,
oil and sand interceptors shall be maintained by the owner, at his
expense, in continuously efficient operation at all times. A user
may petition the Director for an exception from having to install
a fats, oils, and grease (FOG) interceptor in accordance with provisions
specified in the POTW FOG Mitigation Program Policy, as amended from
time to time.
No user shall contribute or cause to be contributed, directly
or indirectly, any pollutant or wastewater which will pass through
or interfere with the operation or performance of the sewage works.
A user may not contribute the following substances to the sewage works:
A. Any liquids, solids or gases which by reason of their nature or quantity
are, or may be, sufficient either alone or by interaction with other
substances to cause fire or explosion or be injurious in any other
way to the sewage works or to the operation of the sewage works.
B. Solid or viscous substances which may cause obstruction to the flow
in a sewer or other interference with the operation of the wastewater
treatment facilities.
C. Any wastewater having a pH less than 5.0 or greater than 11.0, or
wastewater having any other corrosive property capable of causing
damage or hazard to structures, equipment, or personnel of the sewage
works.
D. Any wastewater containing toxic pollutants or of high chlorine demand
in sufficient quantity, either singly or by interaction with other
pollutants, to injure or interfere with any wastewater treatment process,
constitute a hazard to humans or animals, create a toxic effect in
the receiving waters of the sewage works, or exceed the limitation
set forth in the EPA categorical pretreatment standard or any other
federal, state or county standards.
E. Pollutants that result in the presence of toxic gases, vapors, or
fumes within the POTW in a quantity that may cause worker health and
safety problems. This prohibition includes, but is not limited to,
wastewaters that contain liquids, solids or gases that cause gases,
vapors or fumes from the discharge to exceed 10% of the immediately-dangerous-to-life-and-health
(IDLH) concentration. Discharges that contain more than one pollutant
which may contribute to fume toxicity shall be subject to more restrictive
limitations, as determined necessary by the Director. The more restrictive
discharge limits shall be calculated based on additive fume toxicity
of all compounds identified or reasonably expected to be present in
the discharge.
F. Any noxious or malodorous liquids, gases, or solids which either
singly or by interaction with other wastes are sufficient to create
a public nuisance or hazard to life or are sufficient to prevent entry
into the sewers for maintenance and repair.
G. Any substance, which may cause the sewage, works such as residues,
sludges, or scums, to be unsuitable for land application or reclamation
and reuse or to interfere with the reclamation process.
H. Any substance which will cause the sewage works to violate its NPDES
permit or the receiving water quality standards.
I. Any wastewater with color of sufficient light absorbency to interfere
with treatment plant process, prevent analytical determinations, or
create any aesthetic effect on the treatment plant effluent, such
as, but not limited to, dye wastes and vegetable tanning solutions.
J. Daily maximum concentration or mass loading shall not be exceeded
on any calendar day. Where daily maximum limitations are expressed
in terms of a concentration, the daily discharge is the arithmetical
measurement of the pollutant concentration, derived from all measurements
taken that day. Where daily maximum limitations are expressed in units
of mass, the daily discharge is the total mass discharged during the
day. If a composite sample is required for a parameter, the determination
whether the daily maximum limitation for that parameter has been exceeded
on a single calendar day shall be based on the composite sample collected
for that parameter on that calendar day. If grab samples are required
for a parameter, the determination whether the daily maximum limitation
for that parameter has been exceeded on a calendar day shall be based
on the average of all grab samples collected for that parameter on
that calendar day. If only one grab sample is collected for a parameter
on a given day, the determination whether the daily maximum limitation
for that parameter has been exceeded for the day shall be based on
the results of that single grab sample. If the pollutant concentration
in any sample is less than the applicable detection limit, that value
shall be regarded as zero when calculating the daily maximum concentration.
K. Any wastewater having a temperature which will inhibit biological
activity in the sewage works, resulting in interference, but in no
case wastewater with a temperature at the introduction into the sewage
works which exceeds 60° C. (140° F.) or is lower than 0°
C. (32° F.)
L. Any wastewater containing any radioactive wastes or isotopes of such
half-life or concentration as may exceed limits established by applicable
state or federal regulations.
M. Any wastewater which causes a hazard to human life or creates a public
nuisance.
N. Organic-solvent-extractable substances such as fats, wax, grease,
or oils of petroleum origin, whether emulsified or not, in excess
of 100 mg/l or containing substances which may solidify or become
viscous at temperatures between 32° F. 0° C. and 140°
F. 60° C.
O. Freon-extractable substances such as fats, wax, grease, or oils of
petroleum origin, whether emulsified or not, in excess of 100 mg/l
or containing substances which may solidify or become viscous at temperatures
between 32° F. (0° C. and 140° F. 60° C.).
P. Gasoline, benzene, naphtha, fuel oil or other flammable or explosive
liquids, solids or gases or other pollutants which cause the wastewater
to have a closed cup flashpoint of less than 140° F. (60°
C.) or which cause an exceedance of 10% of the lower explosive limit
(LEL) at any point within the collection system or containing gasoline,
benzene, xylene or toluene which causes the wastewater to exceed the
state surface water quality standard.
Q. Any garbage that has not been ground by household type or other suitable
garbage grinders.
R. Any ashes, cinders, sand, mud, straw, shavings, metal, glass, rags,
feathers, tar, plastics, wood, paunch, manure or any other solids
or viscous substances capable of causing obstructions or other interferences
with the proper operation of the sewer system.
S. Toxic or poisonous substances in sufficient quantity to injure or
interfere with any wastewater treatment process, to constitute hazards
to humans or animals, or to create any hazard in waters which receive
the POTW effluent, which shall include, but are not limited to, wastes
containing cyanide, chromium, cadmium, mercury, copper, and nickel
ions.
T. Solids of such character and quantity that special and unusual attention
is required for their handling.
U. Any substance which would cause the treatment plant to be in noncompliance
with sludge use, recycle or disposal criteria pursuant to guidelines
or regulations developed under Section 405 of the Federal Act, the
Solid Waste Disposal Act, the Clean Air Act, the Toxic Substances
Control Act or other regulations or criteria for sludge management
and disposal as required by the state.
V. Any medical or infectious wastes prohibited from being discharged
under federal or state law and regulations.
W. Material considered a hazardous waste under the Resource Conservation
and Recovery Act (RCRA).
X. Any commercial or industrial waste that may cause pass-through of
pollutants or interference with the wastewater treatment plant operations
or that violates federal, state, or local restrictions.
Y. Any pollutant, including oxygen-demanding pollutants (BOD, etc.)
released at a flow rate and/or pollutant concentration which will
cause interference with the POTW.
Z. Trucked and hauled waste, except at discharge points designated by
the POTW.
AA. Pollutants causing toxic gases, vapors, and fumes.
BB. Any leachate from a hazardous waste landfill.
CC. Any landfill leachate, unless permitted and authorized under a written
contract, within the POTW's sole discretion, between the POTW
and the user.
DD. Any pollutant discharge which constitutes a slug.
Upon the promulgation of the national categorical pretreatment
standards, alternative discharge limits, or other federal or state
limitations, for a particular industrial subcategory, the pretreatment
standard, if more stringent than limitations imposed under this chapter
for sources in that subcategory, shall immediately supersede the limitations
imposed under this chapter and shall be considered part of this chapter.
The POTW shall notify all affected users of the applicable reporting
requirements.
Sampling and analysis shall be performed in accordance with
the techniques prescribed in 40 CFR Part 136 (March 26, 2007). Where
40 CFR Part 136 (March 26, 2007) does not contain sampling or analytical
techniques for the pollutant in question, or where the EPA determines
that the Part 136 (March 26, 2007) sampling and analytical techniques
are inappropriate for the pollutant in question, sampling and analysis
shall be performed by using validated analytical methods or any other
applicable sampling and analytical procedures, including procedures
suggested by the POTW or other parties, approved by the EPA.
With respect to compatible pollutants only, no statement contained
in this chapter shall be construed as preventing any agreement between
the Director and any industrial concern whereby an industrial waste
of unusual strength or character may be accepted, subject to payment
therefor by the industrial concern, provided that such agreement shall
not violate EPA guidelines or NPDES requirements and provided that
user charges and surcharges as provided in this chapter are agreed
to in the agreement.
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 the limitations
contained in the National Categorical Pretreatment Standards, alternative
discharge limits, or in any other pollutant-specific limitation developed
by the POTW or the state.
To determine the sewage flow from any establishment, the POTW
may use one of the following methods:
A. The amount of water supplied to the premises by the public water
system as shown upon the water meter if the premises are metered.
B. If the premises are supplied with river water or water from private
wells, the amount of water supplied from such sources may be metered
at the source or metered at its point of discharge prior to entry
into the public sewer.
C. If such premises are used for an industrial or commercial purpose
of such a nature that the water supplied to the premises cannot be
entirely discharged into the sewer system, the estimate of the amount
of sewage discharged into the sewer system made by the utilities authority
from the water, gas or electric supply, or metered at its point of
discharge prior to entry into the public sewer.
D. The volume of sewage discharged into the sewer system as determined
by measurements and samples taken at a manhole installed by the owner
of the property served by the sewer system at his own expense in accordance
with the terms and conditions of the permit issued by the POTW pursuant
to this chapter.
E. A figure determined by the POTW by any combination of the foregoing
or by any other equitable method.
Waste from industrial sewage disposal systems shall be disposed of at the sewage treatment plant or at any other refuse or disposal site approved by the Director. No waters or wastes described in §
142-39 shall be disposed of at the sewage treatment plant.
If the results of any sampling performed by the user indicate
that any violation of this chapter, a permit, an order issued under
this chapter, the Act or the State Act has occurred, the user shall
notify the POTW within 24 hours of becoming aware of the violation
and shall repeat the sampling and pollutant analysis and shall submit,
in writing, the results of this repeat analysis within 30 days after
becoming aware of the violation. A written follow-up report shall
be filed by the user with the POTW within 30 days of a user becoming
aware of the violation. The report shall specify the following:
A. A description of the violation, the cause thereof, and the violation's
impact on the user's compliance status.
B. Duration of the violation, including exact dates and times of the
violation, and if not corrected, the anticipated time the violation
is expected to continue.
C. All steps taken or intended to be taken to reduce, eliminate and
prevent reoccurrence of such a violation.
All industrial users shall notify the POTW, the EPA regional
waste management division Director and the DEQ in writing of any discharge
to the POTW of a substance that would be a regulated hazardous waste
under any federal statute if disposed of otherwise. Such notice shall
be given in accordance with 40 CFR 403.12(p).