The categorical pretreatment standards found at 40 CFR 405 through
471 are hereby incorporated in this chapter by reference as though
set forth in full.
A. Where a categorical pretreatment standard is expressed only in terms
of either the mass or the concentration of a pollutant in wastewater,
the Superintendent may impose equivalent concentration or mass limits
in accordance with 40 CFR 403.6(c).
B. When wastewater subject to a categorical pretreatment standard is
mixed with wastewater not regulated by the same standard, the Superintendent
may impose an alternate limit using the combined wastestream formula
in 40 CFR 403.6(e).
C. A user subject to categorical pretreatment standards may obtain a
variance from a categorical pretreatment standard if the user can
prove, 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 EPA when developing the categorical
pretreatment standard.
D. A user may obtain a net gross adjustment to a categorical standard
in accordance with 40 CFR 403.15.
Where the Borough's wastewater treatment system achieves consistent
removal of pollutants limited by federal pretreatment standards, the
Borough may apply to the approval authority for modifications of specific
limits in the federal pretreatment standards. "Consistent removal"
shall mean the reduction in the amount of a pollutant or alteration
of the nature of the pollutant by the wastewater treatment system
to a less toxic or harmless state in the effluent which is achieved
by the system in 95% of the samples taken when measured according
to the procedures set forth in 40 CFR 403.7(c)(2). The Borough may
then modify pollutant discharge limits from the federal pretreatment
standards if the requirements contained in 40 CFR 403.7 are fulfilled
and prior approval from the approval authority is obtained.
[Amended 9-15-2010 by Ord. No. 1796; 12-21-2011 by Ord. No. 1816]
A. The following pollutant limits are established to protect against
pass-through, noncompliance with the Borough's NPDES permit limitations,
interference with and inhibition of treatment, interference with sludge
disposal and/or adverse effects on utilization and worker safety.
No person shall discharge or cause to be discharged wastewater containing
in excess of the limitation set forth in the Specific Local Pollutant
Limitations Table hereinbelow.
|
Specific Local Pollutant Limitations Table
|
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|
Parameter
|
Daily Maximum Concentrations from User Connections to
POTW
(mg/l)
|
Daily Average Concentrations from User Connections to
POTW
(mg/l)
|
---|
|
BOD5
|
|
750 (See Note 1)
|
|
Cadmium, total
|
0.3
|
|
|
Chromium, total
|
6.0
|
|
|
Copper, total
|
1.1
|
|
|
Lead, total
|
1.2
|
|
|
Molybdenum, total
|
0.4
|
|
|
Nitrogen-Ammonia as N
|
|
50 (See Note 1)
|
|
Oil and grease
|
100
|
|
|
PCBs
|
0.007
|
|
|
Phenol, total
|
0.2
|
|
|
Phosphate as P
|
|
(See Note 1)
|
|
Selenium, total
|
0.3
|
|
|
Total suspended solids
|
|
750 (See Note 1)
|
|
Zinc, total
|
1.7
|
|
|
Total toxic organics [(1)]
|
Monitor only (See Note 2)
|
|
|
Any single toxic organic — not specifically listed in
this table
|
Monitor only (See Note 2)
|
|
|
Bis (2-ethylhexyl) phthalate
|
0.21
|
|
|
Ethylbenzene
|
1.66
|
|
|
Methylene chloride
|
0.31
|
|
|
Tetrachlorethane
|
0.01
|
|
|
Tetrachloroethene
|
0.25
|
|
|
Toluene
|
2.08
|
|
|
Butylbenzylphthalate
|
2.37
|
|
|
Di-n-butylphthalate
|
1.05
|
|
|
Flouranthene
|
2.00
|
|
|
Napthalene
|
3.98
|
|
|
Phenanthrene
|
0.05
|
|
|
NOTES:
|
|
Note 1: Any user which discharges wastewater to the Borough's
sewer system having concentrations of five-day biochemical oxygen
demand (BOD 5), total suspended solids (TSS),
ammonia-nitrogen (NH 3-N) and total phosphorus (TP) in excess the following concentrations will be subject to the Borough's strength surcharge program set forth in § 323-19:
|
|
•
|
BOD5: 230 mg/l
|
|
•
|
TSS: 200 mg/l
|
|
•
|
NH3-N: 25 mg/l
|
|
•
|
TP: 10 mg/l
|
|
Note 2: "Total toxic organics (TTO)" is defined as the sum of
all concentrations greater than the detection limit of the volatile
organics, acid-extractable and base/neutral-extractable compounds
of the 126 priority pollutants. No user may discharge any single toxic
organic pollutant or combination of toxic organic pollutants in amounts
which cause or contribute to pass-through or interference at the WWTP
or in violation of any other portion of this chapter.
|
B. Concentrations apply at the point where the wastewater is discharged
to the sewer. For users subject to categorical standards, categorical
concentrations apply at the end of the process waste stream. The local
limits listed above shall apply to any user's wastewater discharge
which is not composed of strictly domestic sewage. All concentrations
for metallic substances are for "total" metal, unless indicated otherwise.
At its discretion, the Borough may establish alternate local limits
in individual wastewater contribution permits, but only in accordance
with regulatory requirements. At no time will the summation of the
users' discharges for a specific pollutant be greater than the allowable
wastewater treatment facility headworks loading as determined in the
Borough's most-recent local limits evaluation. The local limits, if
more stringent than the National Categorical Standards, shall supersede
the National Categorical Standards.
C. The instantaneous maximum concentration of oil and grease shall not
exceed 100 mg/l. In addition, no user may discharge total dissolved
solids (TDS) in amounts which cause or contribute to pass-through
or interference at the WWTP or in violation of any other portion of
this chapter.
State requirements and limitations on discharges shall apply
in any case where they are more stringent than either federal requirements
and limitations or those in this chapter.
The Borough reserves the right to establish by ordinance, resolution of Borough Council or in permits more stringent limitations or requirements on discharges to the POTW if deemed necessary to comply with the objectives presented in §
323-2 of this chapter or the general and specific prohibitions in §
323-5 of this chapter.
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 federal categorical pretreatment standards, or with
any other pollutant-specific limitation developed by the Borough,
state, or federal agencies, including local limits. The Borough may
impose mass limitations on users who it believes are using dilution
to meet applicable pretreatment standards or requirements, or in any
other case in which the imposition of mass limitations is appropriate
in the opinion of the Superintendent.
Users shall permanently post a notice in a prominent place or
places sufficient to advise employees whom to call in the event of
an unlawful discharge to sewers that could adversely affect the environment,
the POTW or its operations, workers or the public. Employers shall
ensure that all employees who may be in a position to discover or
who, because of their job duties, could be in a position to inadvertently
cause such a discharge, are advised of the emergency notification
procedures.
The requirements of this §
323-17 shall apply to new or modified food service establishments, to any existing food service establishment upon the sale/transfer thereof, and to any existing food service establishments or other user determined by the Borough to be discharging FOG in sufficient quantities to require control.
A. Grease interceptor requirements: users shall install, operate, and maintain an approved type and adequately sized grease interceptor necessary to maintain compliance with the requirements of this §
323-17. In addition, all grease interceptors must meet the minimum requirements of the Uniform Construction Code as adopted by the Borough.
B. Implementation. All facilities required to install a grease interceptor
must obtain prior approval from the Borough with respect to grease
interceptor design, sizing, etc. prior to installation. In the case
of newly constructed facilities, or existing facilities with planned
modifications or plumbing improvements, approval from the Borough
shall be obtained prior to receipt of building permits from the Borough.
In the case of newly sold food service establishments, approval from
the Borough shall be obtained prior to any discharge by the new owner.
In the case of an existing food service establishment or other users
determined by the Borough to require control, the users shall submit
grease interceptor design and specifications for approval from the
Borough within 45 days of notice by the Borough that such control
is necessary, or as otherwise stated in the notice.
C. Definitions relative to food service establishments.
(1) Existing food service establishments shall mean any food service
establishment existing on the date of the enactment of this chapter.
(2) New food service establishments shall mean any food service establishment
which begins operation after the date of the enactment of this chapter.
(3) Sale of a food service establishment shall mean the sale or transfer
of operational control thereof.
(4) Modified food service establishment shall mean an existing food service
establishment undergoing material renovations, including without limitation
renovations of the plumbing system or the addition of any equipment
that may result in that change to the nature of the discharge to the
POTW.
D. Variances from grease interceptor requirements. Grease interceptors
required under this chapter shall be installed unless the Borough
determines, in writing, that the installation of an indoor grease
trap or other alternative pretreatment technology may be installed
in lieu of a grease interceptor because the installation of a grease
interceptor would not be reasonably feasible. The user bears the burden
of demonstrating that the installation of a grease interceptor is
not reasonably feasible. Conditions under which the installation of
a grease interceptor would not be reasonably feasible may include
instances in which the installation of a grease interceptor is not
reasonably feasible due to space constraints. If an applicable user
believes the installation of a grease interceptor is not reasonably
feasible, it shall submit a written request for a determination by
the Borough containing the following information:
(1) Location of sewer main and easement in relation to available exterior
space outside building;
(2) A description of and plans showing existing plumbing at the facility,
including plans showing any common plumbing for all wastewater services
at the facility;
(3) An explanation as to why the installation of a grease interceptor
is not reasonably feasible;
(4) A description of a design plan for any alternative pretreatment technology
(other than a grease interceptor) proposed to be installed to trap,
separate and hold FOG from wastewater and prevent it from being discharged
into the POTW. All alternative pretreatment technology must be appropriate;
and
(5) A plan for regular maintenance of the alternative pretreatment technology.
E. Wastewater discharge limitations. No user shall allow wastewater
containing FOG discharged from any grease interceptor, grease trap
or alternative pretreatment technology to exceed 100 milligrams per
liter.
F. Grease interceptor design/operation.
(1) Grease interceptor sizing and installation shall conform to the version
of the Uniform Construction Code currently adopted by the Borough
or other applicable plumbing code used or approved by the Borough.
(2) Grease interceptors shall be constructed in accordance with the design
approved by the Borough and shall have a minimum of two compartments
with fittings designed for grease retention.
(3) Grease interceptors shall be installed at a location where it shall
be easily accessible for inspection, cleaning, and removal of intercepted
grease. The grease interceptor may not be installed in any part of
the building where food is handled. Location of the grease interceptor
must be approved by the Borough.
(4) All such grease interceptors shall be serviced and emptied of accumulated waste content as required in order to maintain minimum design capability. These devices should be inspected at least monthly, and a written record of these inspections should be maintained as set forth in Subsection
F(8).
(5) Grease interceptors shall provide for a minimum hydraulic retention
time in accordance with the Uniform Construction Code or other applicable
plumbing code as adopted by the Borough.
(6) Grease interceptors shall be kept free of inorganic solid materials
such as grit, rocks, gravel, sand, eating utensils, cigarettes, shells,
towels, rags, etc., which could settle into this pocket and thereby
reduce the effective volume of the device.
(7) During the first year after installation, grease interceptors shall be pumped out at least semiannually or when 75% of the system capacity is reached, whichever is more frequent. After the first year of use, grease interceptors must be pumped out at least annually or when no more than 75% of the system capacity is reached, whichever is more frequent. After two years of use, the pumping frequency may be reduced, upon written approval of the Borough, if adequate documentation can be shown that a reduced pumping frequency is sufficient to comply with the provisions of this §
323-17.
(8) The user shall maintain a written record of inspection and maintenance
of the grease interceptor and disposal of FOG from the grease interceptor
for five years. All such records will be made available for on-site
inspection by a representative of the Borough.
(9) All inspection and maintenance of the grease interceptor and disposal
of FOG from the grease interceptor shall be conducted by adequately
trained personnel.
(10)
Toilet wastes shall not be connected to sewer lines connected
to grease interceptor service.
(11)
Access manholes, with a minimum diameter of 24 inches, shall
be provided over each grease interceptor chamber and sanitary tee.
The access manholes shall extend at least to finished grade and be
designed and maintained to prevent water inflow or infiltration. The
manholes shall also have readily removable covers to facilitate inspection,
grease removal, and wastewater sampling activities.
G. Grease trap design/operation.
(1) In the event that the Borough approves the installation of a grease
trap in lieu of a grease interceptor, such grease trap shall comply
with the provisions of this section. Grease traps must be installed
in the waste line leading from sinks, drains, and other fixtures or
equipment in food service establishments where FOG may be introduced
into the discharge to the POTW in excess of 100 milligrams per liter.
(2) Grease traps sizing and installation shall conform to the Uniform
Construction Code or other applicable plumbing code as adopted by
the Borough.
(3) No grease trap shall be installed which has a stated rate flow of
more than 55 gallons per minute, nor less than 20 gallons per minute,
except where specifically approved by the Borough, in writing.
(4) Grease traps shall be maintained in efficient operating conditions by periodic removal of the accumulated FOG. No such collected FOG shall be introduced into any drainage piping or public or private sewer. For the first year after installation the trap shall be pumped out at least semiannually or when 75% of the capacity of the system is reached, whichever is more frequent. Thereafter, traps must be emptied out at least annually or when no more than 75% of the capacity of the system is reached, whichever is more frequent. This frequency can be reduced by the Borough, in writing, if adequate documentation can be shown that a reduced pumping frequency is sufficient to comply with the provisions of this §
323-17.
(5) The user shall maintain a written record of inspection and maintenance
of the grease trap and disposal of FOG from the grease trap for five
years. All such records will be made available for on-site inspection
by a representative of the Borough.
(6) All inspection and maintenance of the grease trap and disposal of
FOG from the grease trap shall be conducted by adequately trained
personnel.
(7) No food waste disposal unit, dishwasher, or toilet shall be connected
to or discharge into any grease trap.
(8) Wastewater in excess of 140° F./60° C. shall not be discharged
into a grease trap.