(c)
Application Requirements.
Except for general permits, application for a new permit or renewal of a permit
shall be made on forms provided or approved by the commissioner and shall
include all applicable information referred to in this subsection. Application
for a new or renewed general permit, as specified in subdivision (b) (6) of
section
22a-430-3
of the Regulations of Connecticut State Agencies, shall be made on forms
provided or approved by the commissioner and shall include only the information
specified in subdivisions (1), (2), (3), (13) and (25) of this subsection.
Where the name of a specific substance is required and the disclosure of that
substance would reveal information relating to secret processes or methods of
manufacture or production, the applicant may provide a description of the
physical, chemical and toxicological properties of the substance in place of
its name. This information shall include all information reasonably available
that might bear on the commissioner's decision regarding the application or the
terms and conditions of the permit. This exception shall not apply to
substances listed in Appendix B or D of this section, nor shall it prohibit the
commissioner from requiring additional information up to and including the name
of the substance if he or she deems necessary. However, in determining whether
the name of the substance is necessary, the commissioner shall consult with the
applicant and consider the need for confidentiality. Any production or effluent
data which is required to be submitted pursuant to this subsection shall, for
existing discharges, be based on actual production or effluent quality, and,
for new discharges, be based on reasonable projections. If an applicant or
permittee becomes aware of a change in any information submitted as part of an
application for a permit, or that any such information was erroneous, or that
any relevant facts were omitted from the application, he or she shall submit
the correct information to the commissioner in writing within thirty days.
(1) The name (if a corporation transacting
business in Connecticut, the full exact name as registered with the Secretary
of the State), mailing and location addresses, and telephone numbers of the
applicant, facility, facility owner and facility operator, and the operator's
status as Federal, State, private, public or other entity.
(2) The date of the application and the date
each discharge began or will begin.
(3) A brief general description of the nature
of the business or activity and of each existing or proposed activity or
process generating a discharge.
(4)
For NPDES permits, for state permits for process wastewater discharges and for
other state permits if required by the commissioner:
(A) The principal raw materials utilized,
products produced or services provided. If a production-based effluent
limitation has been adopted in subsection (1) of this section by reference to
section 304 of the CWA, production figures shall be reported in the same units
and for the same time period expressed in the limitation in subsection
(1);
(B) Up to four SIC codes most
applicable to the activities or services to be covered by the permit;
and
(C) If any toxic or hazardous
substance is anticipated to be used or present in a raw material or
intermediate or final product or byproduct, a listing of each
substance.
(5) A site
plan and topographic map, drawn to scale with the scale shown, including a
north meridian arrow. The site plan shall clearly show all buildings, actual
and potential sources of discharge, and all intake and discharge locations
including all wells where fluids from the facility are injected underground.
The topographic map shall extend at least one mile beyond the property
boundaries of the facility and clearly show the location of the facility in
relation to all roads, surface waters, springs and wells. For NPDES permits,
state permits for process wastewater discharges and for other state permits if
requested by the commissioner, the applicant shall include on the site plan all
fixed treatment, storage or disposal facilities for toxic or hazardous
substances above or below ground and such other substances and types of
facilities as the commissioner may direct. For NPDES permits for discharges
from manufacturing, commercial, mining and silvicultural activities, the
latitude and longitude of each discharge to the nearest fifteen seconds shall
be reported. All roads and surface waters shall be named.
(6) The average and maximum amount of
wastewater to be discharged per day or event. If different types of processes
contribute to one discharge, each individual process type shall be so
described. An identification of all types of wastes generated by each type of
process shall be included. For privately owned treatment works, this
information shall include the name and location address of all users of the
system
(7) Average and maximum
hours per day over which each discharge will occur.
(8) If any discharges are batch type,
intermittent or seasonal, they shall be so described, including the frequency
and duration of each.
(9) For
process wastewater discharges and for other discharges if required by the
commissioner, a list of names and maximum quantities of all substances which
are stored on-site as designated on the site plan required under subdivision
(c) (5) above. For all substances stored in containers of five gallons or less,
this list may be limited to a generic description of the categories of
substances stored and an estimate of the maximum total quantity of each
category stored. The categories to be listed shall include acids, bases,
cyanides, organic chemicals and heavy metals.
(10) For process wastewater discharges and
for other discharges if required by the commissioner, a plan describing all
provisions to prevent and control spills, leaks and other unplanned releases of
all substances included in the inventory submitted under subdivision (c) (9)
above, including but not limited to:
(A) An
evaluation of each facility or system used for the storage, collection,
transfer, treatment, loading or unloading of any such substances for its
potential to generate a spill, leak or other unplanned release, and the maximum
potential magnitude of such spill, leak or release.
(B) Provisions adequate to meet the
requirements of subsection (p) of section
22a-430-3
of the Regulations of Connecticut State Agencies.
The commissioner may exempt certain facilities included in the
inventory submitted under subdivision (c) (9) above from the requirements of
this subparagraph if in his or her judgement such facilities are unlikely to
cause pollution.
(11) For process wastewater discharges and
for other discharges if required by the commissioner, a complete description of
the types of resource conservation practices and provisions for complying with
the requirements of subsection (o) of section
22a-430-3
of the Regulations of Connecticut State Agencies.
(12) A description of the type, quantity and
method of disposal of all process wastewaters which are not included in the
discharges which are the subject of the application, including but not limited
to screenings, sludges, oils, solvents and other chemicals. The commissioner
may require the submission of a signed contract which provides for proper
disposal of such wastes.
(13) An
indication of whether the facility is or will be located either within the
coastal boundary as defined by section
22a-94
of the General Statutes as amended (as delineated on maps contained in the
appropriate town clerk's office) or on Indian lands. The commissioner may
require the applicant to submit additional information to support a
determination that the proposed activity is consistent with the provisions of
sections
22a-94
through 22a-112 of the General Statutes, as amended.
(14) The names of the categories of discharge
for which effluent limitations have been adopted in subsection (1) of this
section, citing evidence and reasons why such categories are
applicable.
(15) For any discharge
from a manufacturing, commercial, mining, or silvicultural facility, a line
drawing of the water flow through the facility with a water balance, showing
all separate production operations contributing wastewater to the effluent and
treatment units. The water balance must show approximate average and maximum
flows at intake and discharge points and between units, including treatment
units.
(16) A complete description
of all collection and treatment facilities proposed or provided, including
drawings to scale, describing in detail the existing or proposed means of
complying with the applicable effluent limitations and conditions in subsection
(1) of this section and section
22a-430-3
of the Regulations of Connecticut State Agencies. The commissioner may require
that such drawings be prepared by an engineer licensed to practice in the State
of Connecticut. Plans and specifications previously submitted and approved by
the commissioner may be incorporated by reference, and shall be deemed to be a
part of the current application.
(17) A general description of the methods and
provisions for operation and maintenance of the collection and treatment
facilities, including an operation and maintenance manual if required pursuant
to subsection (f) of section
22a-430-3
of the Regulations of Connecticut State Agencies and documentation of any
operator certification required under sections
22a-416-1 through
22a-416-10 of
the Regulations of Connecticut State Agencies as amended. Manuals previously
submitted may be incorporated by reference and shall be deemed to be part of
the current application.
(18) For
NPDES permits, a listing of all permits or construction approvals received or
applied for under each of the following programs:
(A) Hazardous Waste Management program under
RCRA or the Connecticut Hazardous Waste Management laws.
(B) UIC program.
(C) NPDES program.
(D) Prevention of Significant Deterioration
(PSD) program under the Clean Air Act.
(E) Nonattainment Program under the Clean Air
Act.
(F) National Emission
Standards for Hazardous Pollutants (NESHAPS) preconstruction approval under the
Clean Air Act.
(G) Ocean dumping
permits under the Marine Protection Research and Sanctuaries Act.
(H) Dredge or fill permits under section 404
of CWA.
(I) State discharge permits
issued under section
22a-430
of the Connecticut General Statutes.
(J) Other relevant environmental permits,
including State permits.
(19) For NPDES permits, if the applicant is
subject to any requirements or compliance schedules for construction, upgrading
or operation of wastewater treatment facilities, an identification of the
requirement, description of the project, and a listing of the required and
projected final compliance dates.
(20) The following specific information shall
be submitted for each discharge in each applicable discharge category listed
below. When quantitative data is required by this subdivision, the applicant
must collect a representative daily composite sample of the effluent and
analyze it for the required parameters, and, for existing permitted discharges,
except where grab samples are required, shall also report the average monthly
and maximum daily concentrations for all parameters subject to a monitoring
requirement in the applicant's existing permit for each of the most recent
twelve months prior to the date of the application. When the applicant has two
or more discharges in the same discharge category and all such discharges are
of substantially identical effluent quality, the commissioner may allow the
applicant to submit some or all of the information for only one discharge, and
report that such information also applies to the other similar discharges. An
applicant is expected to know or have reason to believe or reasonably ascertain
that a substance is present in a discharge based on an evaluation of the
expected use, production, or storage of the substance, an investigation of the
contents of raw materials, and on any previous analyses for the substance. A
requirement that an applicant provide information for any such substances does
not apply to substances present solely as a result of their presence in the
intake water, however, an applicant must report such substances as present.
Where chemical analyses are required, daily composite samples shall be used,
except that grab sample averages shall be used for temperature, cyanides, total
phenols, oil and grease and fecal coliform bacteria, and for pH and total
residual chlorine, the range during the composite sample shall be reported. All
samples shall be collected, handled and analyzed in accordance with methods
listed or approved under 40 CFR Part
136. The commissioner may require the
applicant to submit any or all data on which the following information is
based.
(A) For permits for discharges of
process wastewater, NPDES permits for discharges of sewage from a POTW or for
domestic sewage from any other facility:
(i)
For existing discharges and for new discharges if required by the commissioner,
every applicant must report quantitative data for every discharge for the
following parameters except that pH and temperature shall be reported as noted.
The commissioner may waive the reporting requirements for one or more of the
parameters listed in this subparagraph if the applicant has demonstrated that
such a waiver is appropriate because information adequate to support issuance
of the permit is otherwise available.
Biochemical Oxygen Demand (BOD)5'
Chemical Oxygen Demand,
Total Organic Carbon,
Oil and Grease,
Total Suspended Solids,
Ammonia (as Nitrogen),
Phosphorus (Total),
Maximum temperature (both winter and summer), and pH (minimum
and maximum).
(ii) For
existing discharges, and for new discharges if required by the commissioner,
each applicant with processes in one or more primary industry categories listed
in Appendix A contributing to a discharge shall report quantitative data for
the following substances in each discharge containing process wastewater
(except the cyanides and total phenol, for which the maximum concentration
shall be reported):
(a) The substances in the
fractions designated in Table I of Appendix B for the applicant's discharge
category or categories. Table II of Appendix B lists the substances in each
fraction. The commissioner's determination that an applicant falls within a
particular discharge category for the purposes of selecting fractions for
testing is not conclusive as to the applicant's inclusion in that category for
any other purposes.
(b) The
substances listed in Table III of Appendix B.
(iii) For existing discharges and for new
discharges if required by the commissioner, each applicant shall report for
each discharge quantitative data for each of the following substances, if the
applicant knows or has reason to believe or can reasonably ascertain that the
substance is discharged or if an applicable limitation in subsection (1)
directly or, through an indicator parameter, indirectly, limits the substance
(except for oil and grease and fecal coliform bacteria, for which maximum
concentration shall be reported):
(a) All
substances listed in Table II or Table III of Appendix B for which such
information is not otherwise required under subparagraph (20) (A) of this
subsection.
(b) All substances in
Tables IV and V of Appendix B.
(iv) For existing discharges of process
wastewater, for new discharges if required by the commissioner and, for NPDES
discharges from existing manufacturing, commercial, mining and silvicultural
facilities, each applicant shall report quantitative data for 2,3,7,8-
tetrachlorodibenzo-p-dioxin (TCDD) using a screening procedure not calibrated
with analytical standards if the applicant:
(a) Uses or manufactures
2,4,5-trichlorophenoxy acetic acid (2,4,5,-T); 2-(2,4,5-trichlorophenoxy)
propanoic acid (Silvex, 2,4,5,-TP); 2-(2,4,5-trichlorophenoxy) ethyl,
2,2-dichloropropionate (Erbon); 0,0-dimethyl-0 (2,4,5-trichlorophenyl);
phosphorothioate (Ronnel); 2,4,5-trichlorophenol (TCP); or hexachlorophene
(HCP); or
(b) Knows or has reason
to believe or can reasonably ascertain that TCDD is or may be present in the
discharge.
(v) Each
applicant shall identify and provide a summary of the results of any biological
toxicity tests which the applicant knows or has reason to believe have been
made within the last three years on any of the applicant's discharges at the
site in question or on any receiving water in relation to any such
discharges.
(B) For
NPDES permits for concentrated animal feeding operations and concentrated
aquatic animal production facilities:
(i) For
concentrated animal feeding operations:
(a)
The type and number of animals in open confinement and housed under
roof.
(b) The number of acres used
for confinement feeding.
(c) The
design basis for the runoff diversion and control system, if one exists,
including the number of acres of contributing drainage, the storage capacity,
and the design safety factor.
(ii) For concentrated aquatic animal
production facilities:
(a) The maximum daily
and average monthly flow from each discharge location.
(b) The number of ponds, raceways, and
similar structures.
(c) For each
species of aquatic animals, the total yearly and maximum harvestable
weight.
(d) The calendar month of
maximum feeding and the total mass of food fed during that month.
(C) For state permits
for discharges of domestic sewage through land treatment non-point source
discharge systems, including but not limited to septic tank leachfield
subsurface sewage disposal systems:
(i) An
engineering report including but not limited to the following information:
(a) Data of soils tests including but not
limited to deep test pits, soil borings and permeability tests in sufficient
numbers to define the hydrogeologic regime on the site. Such information shall
include the dates of all testing.
(b) A description of any proposed treatment
system to be utilized prior to land application of wastewater, including the
estimated effluent quality.
(c)
Calculations according to best engineering practices determining the
application area, the hydrogeologic capability of the site to accept the volume
of waste or wastewater and the ability of the site to renovate the waste or
wastewater.
(d) A description of a
proposed program to monitor the disposal system, the discharge or the effects
of the discharge on the waters of the state.
(e) A description of any proposed fiscal or
institutional controls intended to ensure the proper operation and maintenance
of the system.
(ii) A
preliminary plan drawn to a scale of one inch equal to fifty feet or less
including but not limited to the following information:
(a) Property boundaries,
(b) Surface contours at two foot intervals in
the proposed treatment area, including existing and proposed
contours,
(c) The location of all
soil tests on the property,
(d)
Building locations and dimensions,
(e) Location of all watercourses and
subsurface pipes,
(f) Location of
all existing or proposed wells,
(g)
A schematic diagram of the system proposed to treat the discharge including
component elevations, and
(h) The
location of all areas which have been designated as inland wetlands under
section
22a-38 of the General
Statutes, as amended.
(D) For discharges from agricultural
activities, a farm waste management plan including but not limited to:
(i) A description of the nature of the
agricultural activity.
(ii) Design
drawings of facility components, prepared by the Soil Conservation Service or a
professional engineer licensed to practice in the State of
Connecticut.
(iii) If the
wastewater is disposed of through land application, loading rates and number of
acres available for crop growing purposes.
(E) For state permits for discharges of
leachate from a solid waste disposal area to the surface waters, ground waters
or to a sanitary sewerage facility, the following information:
(i) A detailed area map at a scale of
approximately one inch equal to five hundred feet which shows topography and
all pertinent features within a minimum one half mile radius of the boundaries
of the disposal area, including but not limited to:
(a) structures,
(b) roads,
(c) drainage features including streams,
ponds and designated inland or tidal wetlands,
(d) one hundred year flood
boundary,
(e) rights-of-way
including gas, electric, sewer and water,
(f) surficial and bedrock geology, as
mapped,
(g) designated, in-use, or
potential aquifers,
(h) areas
within the coastal boundary as defined by section
22a-94
of the General Statutes, as amended,
(i) public water supply wells,
(j) any domestic water supply wells within
one thousand feet of the site or within the existing and predicted leachate
plume, and
(k) areas served by
public water supply.
(ii) A detailed site map at a scale no
greater than one inch equal to one hundred feet with the contour interval of
two feet or five feet which shows the entire disposal area and the area of the
existing and predicted leachate plume to the point of discharge to a surface
water. The site map shall show:
(a) contours
after site preparation,
(b)
proposed final contours,
(c)
existing and potential water table contours,
(d) section lines,
(e) all test pits, borings and monitor
wells,
(f) all surface and ground
water monitoring points and existing and proposed locations of fill limit
markers,
(g) on-site buildings,
fences, gates and roads,
(h)
existing and proposed sedimentation and erosion controls, and
(i) area of the existing and predicted
leachate plume.
(iii) A
minimum of two cross sections through the site, one perpendicular and one
parallel to the ground water flow, depicting existing, site preparation and
final grades, water table, depth of existing and predicted leachate plume,
bedrock surface and structure, and details (layering) of the unconsolidated
deposits.
(iv) A report describing
water quality impacts which includes:
(a) An
explanation of the ground water contour map showing flow directions and area of
the existing and potential maximum extent of leachate discharges to ground
water (plume map). Water levels should be based on a minimum of two rounds of
water level readings from all available wells, test pits, springs and borings;
readings to be taken during spring high water levels, if possible.
(b) A description of the interaction between
the surficial and bedrock geology, the ground water flow, surface waters and
the leachate discharge, including all boring logs and monitor well construction
details. Monitor wells shall be installed using methods and materials
satisfactory to the commissioner.
(c) An estimate of the quantity of the
proposed discharge volume on a monthly and annual basis using a water budget
based on site area and infiltration rates.
(d) A characterization of the worst-case
leachate quality based on waste type to be disposed of, by on-site testing,
testing of similar landfills, or published literature.
(e) Using leachate indicators as defined in
section
22a-430-3
of the Regulations of Connecticut State Agencies as amended, and any other
substances as required by the commissioner, a prediction of the worst case
leachate impact on the ground waters at the site boundary and surface waters at
the downgradient end of the leachate plume. Surface water impacts shall be
calculated using seven day, ten year low flows as obtained from stage
measurements or calculated from the United States Geological Survey Connecticut
Basin Reports. Water quality impacts from leachate shall be added to the
existing background ground and surface water quality for each
parameter.
(f) For existing
discharges, the results of all background water quality data which has been
collected. A minimum of two rounds of samples, one month apart, shall be
collected from all monitor wells, and from up and downstream surface water
locations. Representative nearby water supply wells shall be tested as required
by the commissioner. Parameters tested shall include leachate indicators as
defined in section
22a-430-3
of the Regulations of Connecticut State Agencies as amended and all parameters
for which potable drinking water standards have been adopted by the Connecticut
Commissioner of Health Services.
(g) A detailed discussion of the impact of
the existing or proposed leachate discharge on ground waters, adjacent surface
water, existing or potential water supply wells, and the conformance of the
discharge with existing and proposed Connecticut Water Quality
Standards.
(v) A
description of the solid waste disposal area site operation and management as
it relates to the existing or proposed leachate discharge, specifically
addressing the following:
(a) Landfill area,
volume, and estimated site life.
(b) Type of wastes to be accepted.
(c) An operational sequence that will
minimize infiltration and maximize runoff of precipitation.
(d) A quarterly ground and surface water
quality monitoring program.
(e)
Closure with vegetation, soils, and slopes that will minimize
infiltration.
(f) Post closure site
maintenance and monitoring.
(vi) Any person or municipality may apply to
the Commissioner for an amendment of a groundwater classification. A proceeding
to amend a groundwater quality classification shall be conducted pursuant to
Section
22a-426
of the General Statutes and Section
22a-3a-1 of the
Regulations of Connecticut State Agencies. The Commissioner shall not
reclassify groundwater quality as GC unless the applicant demonstrates that:
(a) The hydrogeology of the affected area
precludes the development of high quality and high yield water
supply;
(b) The hydrogeology of the
affected area is suitable for the treatment of waste and;
(c) The criteria for issuance of a leachate
discharge permit pursuant to Section 22a-430-4 of the Regulations of
Connecticut State Agencies are met.
(vii) The Commissioner shall not issue a
permit for the discharge of leachate from a solid waste disposal area unless:
(a) Assuming for purposes of analysis the
absence of any means at such solid waste disposal area to collect or treat
leachate, the discharge of such leachate would not pollute any receiving
surface water classified as B or SB by the Water Quality Standards or interfere
with the attainment of any water quality classification goal that has been
adopted for such surface water in the Water Quality Standards;
(b) The permit applicant has the right of
possession, by means of fee interest, easement, or otherwise, to the zone of
influence of such solid waste disposal area and;
(c) No potable water supply well is located
within the zone of influence of such solid waste disposal area and no potable
water supply well is located such that recharge of such well from such zone of
influence could be induced by pumpage, unless the permit applicant will, with
the approval of the Commissioner and the agreement of the user of any such
well, provide an alternate supply of potable water to such user.
In reviewing any application for a permit to discharge leachate
from a solid waste disposal area, the Commissioner shall deem the capability of
the pertinent geologic formation to treat the discharge to be the primary means
of protecting the waters of the State from solid waste leachate.
(F) For
discharges of non-contact cooling water and heat pump wastewaters which are not
included in the definition of "minor non-contact cooling water" and "minor heat
pump wastewaters" in subsection (a) of section
22a-430-3
of the Regulations of Connecticut State Agencies, and for blowdown from heating
and cooling equipment, the following information:
(i) Maximum winter and summer
temperatures.
(ii) Minimum and
maximum pH.
(iii) Maximum daily
concentration of Total Suspended Solids
(iv) A list of all water treatment chemicals
added, including the average monthly and maximum daily concentrations of
each.
(G) For permits
for discharges of domestic sewage from a community sewerage system not owned by
a municipality, a signed letter from the Water Pollution Control Authority of
the municipality in which the system exists, indicating that such authority is
satisfied that the proposed method of management of the system complies with
the provisions of section
7-246f
of the Connecticut General Statutes, as amended.
(21)
(A)
Applicants for the following discharges shall submit a discharge toxicity
evaluation:
(i) Existing NPDES discharges of
process wastewater if the applicant or the commissioner knows or has reason to
believe or can reasonably ascertain that:
(a)
The discharge may contain one or more of the substances listed in Appendix B or
D of this section or
(b) If the
discharge can reasonably be expected to exhibit acute or chronic toxicity based
on the results of acute or chronic toxicity tests or toxicity tests of similar
discharges within the applicant's wastewater category as referred to in the
Monitoring Schedule appended to Section
22a-430-3
of the Regulations of Connecticut State Agencies;
(ii) If required by the commissioner, new
NPDES discharges of process wastewater, other NPDES discharges, and discharges
of sewage from a POTW.
(B) Said evaluation shall describe water
quality impacts of the discharge on the receiving water and include:
(i) Quantitative data describing the toxicity
of the discharge including the results of acute or chronic toxicity tests,
utilizing at least one fish species and one species of aquatic invertebrate
organism as test species, on a minimum of three representative samples of the
discharge. The commissioner may require additional testing or modification to
the testing protocol or test species, where he or she has reason to believe
that the results of tests by the applicant are or may be inconclusive due to
the sampling and testing procedures employed or where the commissioner has
reason to believe that acute or chronic toxicity data for an alternative
species is needed to assess the impact of the effluent on the receiving
waters;
(ii) Results of chemical
analysis data for all samples collected for the purpose of toxicity testing
under this subparagraph shall be provided for all substances for which
monitoring has been required under the expired or expiring permit for the same
discharge or for which effluent limitations or conditions have been established
pursuant to subsection (1) of this section;
(iii) A detailed site plan at a scale no
greater than one inch equal to one hundred feet with discharge dilution
concentration contours labelled at intervals of no greater than ten percent of
the receiving waters in the vicinity of the discharge under 7Q10 conditions.
The location of all watercourses, discharges, wells, surface water intakes,
designated inland or tidal wetlands, known or suspected shellfish beds,
structural features such as bridges, culverts, dams, impoundments, and property
boundaries shall be clearly marked;
(iv) Any other information the commissioner
deems necessary;
(v) A detailed
discussion evaluating the potential impact of the existing or proposed
discharge on the receiving waters, based on the information required by
paragraphs A (i), A (ii), A (iii), and A (iv) above, including, but not limited
to an evaluation of the conformance of the discharge with both the Connecticut
Water Quality Standards and any limitations established pursuant to subsection
(1) of Section 22a-430-4 of the Regulations of Connecticut State
Agencies.
(C) The
commissioner may exempt applicants for NPDES permits from all or part of the
testing, evaluation, and monitoring requirements specified in subparagraph (B)
of this subdivision if a discharge toxicity evaluation has already been
submitted and approved by the commissioner for the discharges in question in
accordance with subsection (j) (ten) of Section
22a-430-3
of the Regulations of Connecticut State Agencies, or if the applicant submits a
written request including but not limited to:
(i) An estimate of the acute and chronic
toxicity of the discharge based on a comparison of the concentration of
substances responsible for such toxicity present in the discharge with one or
more of the following:
(a) Water quality
criteria for acute and chronic toxicity published pursuant to Section 304 (a)
of the Clean Water Act. If more than one such substance is present in the
discharge, the toxicity of the mixture shall be assumed to equal the sum of the
toxicities of such individual substances which make up the mixture;
(b) The results of biological toxicity tests
on individual substances present in the discharge or mixtures of substances
similar to those present in the discharge. If more than one substance
responsible for toxicity is present in the discharge, the toxicity of the
mixture shall be assumed to equal the sum of the toxicities of such individual
substances which make up the mixture. Where estimates of chronic toxicity are
made based on the results of acute toxicity measures, chronic toxicity shall be
assumed to occur at a concentration equal to one-twentieth (0.05) of the LC50
value determined in an acute toxicity test. The concentration of a substance or
mixture of substances which will have no acute toxic effect on aquatic
organisms of similar sensitivity to those organisms used in a toxicity test
shall be assumed to be equal to one-third (0.33) of the measured LC50 value
determined in an acute toxicity test;
(ii) The concentration of discharge
anticipated to occur in the receiving waters following dilution and mixing of
the discharge with the receiving waters during 7Q10 conditions pursuant to
subdivision (1) (5) of this section;
(iii) A detailed discussion evaluating the
potential impact of the existing or proposed discharge on the receiving waters,
based on the information required by subparagraphs C (i) and C (ii) above,
including but not limited to an evaluation of the conformance of the discharge
with both the Connecticut Water Quality Standards and any limitations
established pursuant to subsection (1) of this section;
(iv) Any other information the commissioner
deems relevant.
(22) The commissioner may require applicants
for state permits for discharges of process wastewater to a POTW to submit the
information required under subparagraph (A) or (B), and subparagraphs (C), (D)
and (E) inclusive of this subdivision:
(A) An
estimate of the acute and chronic toxicity of the discharge based on a
comparison of the concentration of substances responsible for toxicity present
in the discharge with one or more of the following:
(i) Water quality criteria for acute and
chronic toxicity published pursuant to Section 304 (a) of the Clean Water Act.
If more than one substance responsible for toxicity is present in the effluent,
the toxicity of the mixture shall be assumed to equal the sum of the toxicities
of such individual substances which make up the mixture.
(ii) The results of toxicity tests on
individual substances responsible for toxicity present in the discharge or
mixtures of substances similar to those present in the discharge. If more than
one such substance is present in the discharge, the toxicity of the mixture
shall be assumed to equal the sum of the toxicities of the individual
substances which make up the mixture. Where estimates of chronic toxicity are
made based on the results of acute toxicity measures, chronic toxicity shall be
assumed to occur at a concentration equal to one-twentieth (0.05) of the LC50
value determined in an acute toxicity test. The concentration of a substance or
mixture of substances which will have no acute toxic effect on aquatic
organisms of similar sensitivity to those organisms used in a toxicity test
shall be assumed to be equal to one-third (0.33) of the measured LC50 value
determined in an acute toxicity test.
(B) If the commissioner determines that the
information submitted under subparagraph (A) is or will be inconclusive, he or
she may require the applicant to provide some or all of the following
information:
(i) Quantitative data describing
the toxicity of the discharge including the results of acute or chronic
toxicity tests of the discharge individually, in combination with the discharge
from the POTW or after treatment designed to represent that provided by the
POTW. A minimum of three representative samples of discharge shall be tested
utilizing at least one fish species and one species of aquatic
invertebrate.
(ii) Results of
chemical analysis of all samples collected for the purpose of acute or chronic
toxicity testing under (B) (i) above. Results shall be provided for all
substances for which monitoring has been required under the expired or expiring
permit for the same discharge or for which effluent limitations have been
established pursuant to subsection (1) of this section.
(C) The concentration of discharge
anticipated to occur in the receiving waters following dilution and mixing of
the discharge with the receiving waters during 7Q10 low flow conditions. The
mean average daily flow from the POTW for the year preceding the date of permit
application for the discharge shall be combined with the 7Q10 low flow in the
receiving stream when determining the in-stream discharge
concentration.
(D) The percentage
of the total flow from the POTW represented by the discharge of the process
wastewater discharge to the POTW under the following conditions:
(i) Mean average daily flow from the POTW for
the year preceding the date of permit application for the permit to discharge
to the POTW; and
(ii) The design
flow rate of the POTW.
(E) A detailed discussion evaluating the
potential impact of the existing or proposed discharge on the receiving waters,
based on the information required by this subsection. This discussion shall
include, but not be limited to an evaluation of the conformance of the
discharge with both the Connecticut Water Quality Standards and any limitations
established pursuant to subsection (1) of this section.
(23) If a contract laboratory or consulting
firm performed any of the analyses required by this subsection, the identity of
each laboratory or firm and the analyses performed.
(24) In addition to the above information,
the commissioner may require an applicant or permittee to submit such other
information as he or she deems reasonably necessary, including but not limited
to additional effluent quality data, results of biological studies, necessary
legal instruments and such other reports, plans and studies as may be required
to show the effects of the discharge on the waters of the state and/or any
receiving POTWs or the operation thereof.
(25) For general permits, as specified in
subdivision (b) (6) of section
22a-430-3
of the Regulations of Connecticut State Agencies:
(A) For discharges to surface waters:
(i) The names, if any, of all receiving
waters;
(ii) For stormwater
discharges, a map delineating the geographic area to be covered by the general
permit;
(iii) For potable water
system flushing wastewaters, the number of discharge points and a map
delineating the geographic area to be covered by the general permit;
(iv) For minor non-contact cooling water,
minor heat pump wastewaters and minor blowdown from heating and cooling
equipment, the maximum winter and summer temperatures, maximum instantaneous
flow rate, a list of all chemical additives and their maximum anticipated
concentrations and a map showing the discharge locations;
(v) For hydrostatic pressure testing
wastewaters and dewatering wastewaters, a list of all chemical additives and
their concentrations, the number of discharge points and a map showing the
discharge locations.
(vi) For
groundwater contamination recovery systems for fuel oil and gasoline, a site
plan drawn to a scale of no greater than one inch equals one hundred feet
showing all recovery or interceptor wells, the estimated volume of product
lost, and the names and addresses of the person contracted to clean up the
contamination and the consultant hired to design the proposed remedial action
program.
(B) For
discharges to POTWs, all applicants shall submit the following information in
addition to the information required for the specific discharge categories
below: the frequency and average daily flow of each discharge and plans and
specifications of any proposed treatment facilities:
(i) For photographic processing, the name and
address of the person contracted for recovery of silver;
(ii) For groundwater contamination recovery
systems for fuel oil and gasoline, a site plan drawn to a scale of no greater
than one inch equals one hundred feet showing the location of all recovery or
interceptor wells, the estimated volume of product lost, and names and
addresses of the person contracted to clean up the contamination and the
consultant hired to design the proposed remedial action program;
(iii) For vehicle service floor drain
discharges, the name and address of the person contracted to remove waste oil
and other chemicals from the facility, and specifications of the tank proposed
to be used to store waste oil, if any;
(iv) For minor tumbling and cleaning of
parts, a list of all additives to the wastewater, including both trade names,
chemical names and their anticipated maximum concentrations in the wastewater
for all cleaning agents added to the wastewater;
(v) For carpet and upholstery cleaners, a
list of the trade names, chemical names and their anticipated maximum
concentrations in the wastewater for all cleaning agents added to the
wastewater;
(vi) For minor blowdown
from heating and cooling equipment, a list of all additives to the wastewater,
including all trade names, chemical names and their anticipated maximum
concentrations in the wastewater;
(vii) For furniture refinishing rinsewaters,
a list of all chemicals used in the stripping and refinishing process and the
results of a daily composite sample for methanol, methylene chloride, lead,
zinc, total volatile organics, and pH (range during composite);
(viii) For radiator repair facility
rinsewater, the results of a daily composite sample for lead, zinc, copper,
tin, chromium and pH (range during composite).
(C) For discharges to groundwaters:
(i) For swimming pool filter backwash, the
distances to the nearest drinking water well and subsurface sewage disposal
system, and a list of the chemical names of all additives to the swimming pool
water;
(ii) For groundwater
contamination recovery systems for fuel oil or gasoline, a site plan drawn to a
scale of no greater than one inch equals one hundred feet showing the location
of all interceptor or recovery wells, estimated volume of product lost and the
names and addresses of the person contracted to clean up the contamination and
the consultant hired to design the proposed remedial action program.
(e)
Tentative determination.
(1) If the commissioner determines that an
application is complete, he or she shall make a detailed review of the
application in order to tentatively determine whether the discharge will cause
pollution of the waters of the state or whether any proposed system to treat
the discharge will protect the waters of the state from pollution. In making
such a determination, he or she shall determine that the following requirements
will be met, as applicable:
(A) The effluent
limitations and conditions listed in subsection (l) of this
section, including any case-by-case determinations made under subsection (m) of
this section.
(B) The treatment
requirements listed in subsections (r) and (s) of this section.
(C) The prohibitions listed in subsection (t)
of this section.
(D) The sludge
disposal requirements listed in subsection (g) of section
22a-430-3
of the Regulations of Connecticut State Agencies.
(E) The bypass provisions of subsection (k)
of section
22a-430-3
of the Regulations of Connecticut State Agencies.
(F) The resource conservation requirements of
subsection (o) of section
22a-430-3
of the Regulations of Connecticut State Agencies.
(G) The spill prevention and control
requirements of subsection (p) of section
22a-430-3
of the Regulations of Connecticut State Agencies.
(H) The instrumentation and related
requirements of subsection (q) of section
22a-430-3
of the Regulations of Connecticut State Agencies.
(I) The equalization requirements of
subsection (r) of section
22a-430-3
of the Regulations of Connecticut State Agencies.
(2) During such review the commissioner may
require the submission of any additional information, results of analyses or
data, the need for which becomes apparent upon review of the application, or
the creation of any legal instruments which are necessary to properly evaluate
the application. When such a tentative determination is made, the commissioner
shall notify the applicant in writing of his or her tentative decision to deny
the permit and the reasons therefor, or of his or her tentative decision to
issue, renew or modify the permit, subject to the remaining requirements of the
permit process. In making such a determination, the commissioner shall consider
the factors specified in subdivisions (p) (2) and (3) of this section and may
also consider any prior violation by the applicant of any statute or regulation
administered by the commissioner, or any order or permit issued by the
commissioner.
(3) When a public
notice is required, a copy of the notice sent to the applicant shall constitute
the tentative determination. For each tentative determination to issue, renew,
modify or, for NPDES permits, revoke a permit, the commissioner shall prepare
and submit a draft permit in accordance with subsection (f) of this
section.
(4) If a public notice is
not required in accordance with section
22a-430-2
of the Regulations of Connecticut State Agencies as amended, and if the
applicant has made the demonstrations required by subparagraph (k) (1) of this
section, the commissioner shall issue an approval of plans and specifications,
which approval shall constitute the final determination under subsection (i) of
this section.
(5) When the
tentative decision is to deny the permit, the applicant may request a hearing
as provided in section
22a-436
of the Connecticut General Statutes, as amended.
(g)
Public notice, notice of
hearing.
(1) General Public Notice.
Except as provided in section
22a-430-2
of the Regulations of Connecticut State Agencies as amended, the commissioner
shall prepare a public notice of (A) his or her intent to issue, renew, modify,
deny or, for NPDES permits, revoke a permit; (B) a public hearing on the intent
to issue, renew, modify, revoke or deny a permit; or (C) a new source
determination made under
40 CFR section
122.29. Such public notices shall contain
sufficient information to describe the proposal including but not limited to
the following, as applicable:
(A) The
applicant and facility name and mailing and location addresses.
(B) Application or permit number.
(C) A description of the business and
activities generating each discharge, including all applicable discharge
categories.
(D) A description of
the location, volume, frequency and nature of the discharge, including the type
of treatment provided and types of toxic pollutants (from Appendices B and D)
present in the discharge; whether limits have been placed on internal waste
streams and whether the draft permit contains limits or conditions established
on a case-by-case basis in accordance with subsection (m) of this
section.
(E) Name of the receiving
waters.
(F) Name, business address
and telephone number of a person from whom interested persons may obtain
additional information, including copies of the draft permit, application and
fact sheet, if any.
(G) A brief
description of the procedures and time periods allowed for commenting on the
proposal, the time, place and purpose of any hearing that will be held,
including a statement of procedures to request a hearing (unless a hearing has
already been scheduled) and other procedures by which the public may
participate in the final permit decision.
(H) An identification of all applicable
limitations specifically established in subsection (l) of this
section.
(I) A description of any
variances from the requirements of subsection (l) of this
section proposed to be granted.
(J)
If a hearing is being scheduled, the dates of previous notices pertaining to
the proposal in question.
(K) For
NPDES permits only, when a request for a variance as provided in subparagraph
(2) (A) (ii) of subsection (q) of this section is filed, the public notice
shall include:
(i) A statement that the
thermal component of the discharge is subject to effluent limitations in
subsection (l) of this section and a brief description,
including a quantitative statement, of the thermal effluent limitations
proposed for the permit;
(ii) A
statement that such a request has been filed and that an alternative less
stringent effluent limitation may be imposed on the thermal component of the
discharge and a brief description, including a quantitative statement of the
alternative effluent limitations, if any, included in the request;
and
(iii) If the applicant has
filed an early screening request with the commissioner in accordance with
40 CFR
125.72, a statement that the applicant has
submitted such a request.
(2) The Commissioner shall cause the public
notice or notice of public hearing to be published in a newspaper or newspapers
having a substantial circulation in the affected area.
(3)
(A) The
commissioner shall provide copies of all public notices to the chief elected
official, director of health, and chairpersons of the planning, zoning and
conservation commissions of the municipality in which the discharge is or will
be located, and to those persons and municipalities who have requested to be
put on a mailing list for that purpose.
(B) The commissioner shall provide copies of
all public notices for NPDES permits to the following persons or agencies:
(i) Federal and state agencies with
jurisdiction over fish, shellfish, and wildlife resources and over coastal zone
management, the Advisory Council on Historic Preservation, State Historic
Preservation Officers, and other appropriate government authorities, including
any affected States;
(ii) The U.S.
Army Corps of Engineers, the U.S. Fish and Wildlife Service and the National
Marine Fisheries Service;
(iii) Any
user identified in the permit application of a privately owned treatment
works;
(iv) Persons on a mailing
list developed by:
(a) Including those who
request in writing to be on the list;
(b) Soliciting persons from participants in
past permit proceedings in that area; and
(c) Notifying the public of the opportunity
to be put on the mailing list through periodic publication in the public press
and in such publications as regional and state funded newsletters,
environmental bulletins, or the Connecticut Law Journal.
(v) Each state agency having any authority
under state law with respect to the construction or operation of such
facility.
(C) For NPDES
permits, the commissioner shall send copies of all fact sheets, permit
applications and draft permits to the Regional Administrator and the persons
listed under subdivisions (3) (B) (i), (ii) and (iii) above. For permits for
discharges to POTWs, the commissioner shall send copies of the public notice to
the Regional Administrator and to the superintendent of the POTW.
(D) For state permits, copies of all draft
permits, public notices and permit applications shall be sent to any person who
requests them.
(E) Any person
except municipal officials listed above may by written notice waive their right
to receive public notices, fact sheets, draft permits, and permit applications,
and the commissioner may then cease sending public notices to that person. The
commissioner may also periodically update the list of recipients of such
documents by sending a notice by certified mail requesting written indication
of continued interest from those listed. The commissioner may delete from the
list the name of any person who fails to respond to such request within thirty
days.
(4) The
commissioner may use any other method necessary to give actual notice of the
action in question to any person potentially affected by it.
(p)
Permit
revocation, denial or modification.
(1)
The commissioner may revoke or modify a permit on his or her own initiative or
on request of the permittee or any other person or municipality for the reasons
specified in this subsection. All requests shall be in writing and contain
facts and reasons supporting the request. A permittee requesting revocation of
a permit shall state the requested date of revocation and shall, prior to
revocation, provide the commissioner with satisfactory evidence that the
discharge has been permanently eliminated. The commissioner shall notify the
person making the request and the permittee in writing of the disposition of
the request within ten days of making a decision.
(2) The commissioner shall deny a permit
application in the following circumstances:
(A) When the commissioner determines in
accordance with subsection (e) of this section that the imposition of
conditions cannot ensure that the discharge, either singly or in combination
with other discharges, (i) would not cause or contribute to pollution or that
any proposed system to treat the discharge will protect the waters of the state
from pollution as determined in accordance with subsection (e) of this section,
(ii) would not endanger human health or the environment or (iii) would be
consistent with the Connecticut Water Quality Standards and the water quality
standards of another state.
(B) For
a new discharge or a new source discharging into a water body which does not
meet the Connecticut Water Quality Standards, if a waste load allocation has
been developed for that water body, and if insufficient allocations exist for
that discharge, or if any discharges into the water body existing at the time
of the application are not yet subject to compliance schedules to bring the
water body back into compliance with the Water Quality Standards.
(C) When the conditions of the permit do not
assure compliance with chapter 446k of the Connecticut General Statutes and
regulations adopted thereunder as amended, or when the issuance of the permit
would not be consistent with the provisions of the Clean Water Act.
(D) When, in the judgment of the Secretary of
the Army, anchorage and navigation would be substantially impaired by the
discharge.
(E) For the discharge of
any radiological, chemical or biological warfare agent or high level
radioactive waste.
(F) For NPDES
permits only, when the Regional Administrator objects to the issuance of the
permit as allowed under 40 CFR Part
123.44.
(G) Where he or she has insufficient
information to determine whether the applicant will be able to comply with
chapter 446k of the Connecticut General Statutes and regulations adopted
thereunder as amended.
(3) The commissioner may deny a permit
application in accordance with section
22a-430
of the Connecticut General Statutes and section
22a-3a-1 of the
Regulations of Connecticut State Agencies as amended for the following reasons:
(A) Noncompliance by the permittee with any
statute or regulation administered by the commissioner, or any order or permit
issued by the commissioner; or
(B)
The applicant's failure in the permit issuance process to submit a completed
application or disclose fully all relevant facts, or to comply with any
conditions of an approval issued pursuant to subsection (k) of this section, or
the applicant's misrepresentation of any relevant facts at any time.
(4) The commissioner may revoke a
permit during its term in accordance with section
4-182(c)
of the Connecticut General Statutes as amended, for the following reasons:
(A) Noncompliance by the permittee with any
statute or regulation administered by the commissioner, or any order or permit
issued by the commissioner;
(B) The
applicant's failure in the permit issuance process to submit a completed
application or disclose fully all relevant facts, or the applicant's
misrepresentation of any relevant facts at any time;
(C) The discharge is likely to endanger human
health or the environment and the commissioner determines that permit
revocation or denial is necessary to alleviate such danger; or
(D) A change in any condition that requires
either a temporary or a permanent reduction or elimination of any discharge
authorized by the permit, including but not limited to plant closure or
connection to a POTW.
(5)
(A) The
commissioner may modify a permit during its term in accordance with this
section for the reasons specified in subdivision (4) of this subsection or for
any reason specified in subdivision (d) (4) of section
22a-430-3
of the Regulations of Connecticut State Agencies or
40
CFR
122.62, provided:
(i) Such modification can not reasonably be
expected to result in pollution of the waters of the state, or any other
condition which would violate the provisions of Chapter 446k of the General
Statutes, or regulations adopted thereunder as amended;
(ii) Such modification will result in a
permit no less stringent than allowed by the Clean Water Act and the Safe
Drinking Water Act and regulations adopted thereunder; and
(iii) Such modification does not extend the
term of the permit unless such modification is also part of a permit
renewal.
(B) The
commissioner may make the following minor modifications to a permit with or
without following the procedures specified in subsection (g) of this section.
(i) correct typographical errors;
(ii) with the consent of the permittee,
require more or less frequent or new monitoring or reporting by the permittee,
provided the minimum requirements of subsection (j) of section
22a-430-3
of the Regulations of Connecticut State Agencies are met, and the new
monitoring does not authorize the discharge of a substance not authorized by
the previous permit;
(iii) with the
consent of the permittee, change an interim compliance date in a schedule of
compliance, provided, for NPDES permits only, the new date is not more than one
hundred twenty (120) days after the date specified in the existing permit and
does not interfere with attainment of the final compliance date
requirement;
(iv) with the consent
of the permittee, transfer ownership or operational control of a facility where
the commissioner determines that no other change in the permit is necessary,
provided the procedures specified in subsection (o) of this section are
followed;
(v) with the consent of
the permittee, delete a discharge, pollutant or substance from the permit when
the discharge or the use of the pollutant or substance is terminated or if the
pollutant or substance was never used, and the change does not result in a
discharge from another location, except in accordance with existing permit
limits; or
(vi) bring the permittee
into conformance with a new or revised method of collection or treatment
approved by the commissioner, provided such minor modification does not result
in a permit which is less stringent than the existing permit.
(vii) With the consent of the permittee, make
limitations on existing pollutants or other permit conditions more stringent,
including the addition of limitations on acute and chronic toxicity in
accordance with subsection (l) of this section.
(C) For NPDES permits only, if any
limitation on a toxic substance is adopted in subsection (l)
of this section by incorporation by reference to section 307 (A) of the CWA,
and that limitation is more stringent than any limitation in the permit or
affects a substance not already limited in the permit, the commissioner shall
modify the permit in accordance with this subsection.
(D) When the commissioner intends to modify a
permit, he or she shall indicate in the public notice those terms and
conditions which he or she proposes to modify and any other terms and
conditions which are subject to revision. Only those provisions which are
specified as subject to revision may be modified. The permit as modified shall
continue in effect for the remainder of its original term.
(E) The commissioner may require the
applicant to submit a complete application for renewal of a permit in lieu of a
request for modification.
(6) The permittee shall comply with all
conditions of the existing permit until the permit is revoked or
modified.
(s)
Treatment requirements
(1) For metal finishing discharges,
nonferrous metals manufacturing discharges, iron and steel manufacturing
discharges, electrical and electronic components discharges, aluminum forming
discharges, battery manufacturing discharges, coil coating discharges, copper
forming discharges and metal molding and castings discharges, if any of the
following substances are present in a discharge at concentrations higher than
the limitations allowed in subparagraph (2) of this subsection prior to mixing
with other categories of discharge, the listed treatment technology is
required:
(A) Cyanide. Complete destruction
beyond the cyanate form prior to mixing with non-cyanide wastewaters. If by
alkaline chlorination, two-stage destruction is required.
(B) Hexavalent Chromium. Complete reduction
to the trivalent form prior to mixing with non-hexavent chromium bearing
wastewaters.
(C) Metals.
Pretreatment for chelating agents, neutralization, flocculation/coagulation,
and clarification and/or filtration with sludge dewatering and/or removal as
necessary.
(2) For
process wastewater discharges from the categories listed in subdivision (s)
(1), the following effluent limitations shall apply:
Parameter
|
Allowable Effluent Concentrations
mg/l (1)(4)
|
AverageMonthly
|
MaximumDaily
|
MaximumInstantaneous
(2)
|
Aluminum (4)
|
2.0
|
4.0
|
6.0
|
Barium
|
2.0
|
4.0
|
6.0
|
Cadmium
|
0.1 (0.07)
|
0.5 (0.11)
|
0.75
|
Chromium, Hexavalent (3)
|
0.1
|
0.2
|
0.3
|
Chromium, Total
|
1.0
|
2.0
|
3.0
|
Copper
|
1.0
|
2.0
|
3.0
|
Cyanide, Amenable (3)
|
0.1
|
0.2
|
0.3
|
Cyanide, Total
|
0.65
|
1.2
|
-
|
Fluoride
|
20.0
|
30
|
45.0
|
Gold
|
0.1
|
0.5
|
0.75
|
Iron (4)
|
3.0
|
5.0
|
7.5
|
Lead
|
0.1
|
0.5
|
0.75
|
Nickel
|
1.0
|
2.0
|
3.0
|
Silver
|
0.1
|
0.5
|
0.75
|
Tin
|
2.0
|
4.0
|
6.0
|
Zinc
|
1.0
|
2.0
|
3.0
|
Total Suspended Solids (4)
|
20.0
|
30.0
|
45.0
|
Oil and Grease (4)
|
10.0
|
-
|
20.0
|
(1) All values
are for new and existing discharges except for cadmium, in which case the
numbers in parentheses are for new discharges only.
(2) As determined by a grab sample.
(3) All values are for the effluent from the
treatment system prior to mixing with any other wastewaters or discharges,
except that the commissioner may apply the limitations for hexavalent chromium
and/or amenable cyanide at the discharges from the chromium reduction and
cyanide destruction systems, respectively, if in his or her opinion the flow
from such system is too low in relation to the total flow from the treatment
system to allow a meaningful or accurate measurement at the final discharge.
Such alternate limitations shall not result in greater quantities of these
substances being discharged than those which would be discharged if the
limitations specified above were applied at the effluent from the treatment
system.
(4) These limitations apply
only to NPDES permits.
(3) The following minimum levels of treatment
apply to the corresponding categories of discharge, subject to the approval of
the commissioner. The commissioner may require additional treatment on a
case-by-case basis.
(A) For minor
photographic processing wastewaters, silver recovery.
(B) For groundwater contamination recovery
system wastewaters from oil recovery operations, gravity separation and
skimming of floatable materials in a tank with a retention time of at least six
hours and, for groundwater contamination recovery system wastewaters from
gasoline recovery operations, aeration or carbon adsorption. For receiving
waters designated in the "Connecticut Water Quality Standards and
Classifications" as a goal of AA or A, the total volatile hydrocarbon
concentration of the discharge shall not be greater than ten parts per billion
at any time.
(C) For vehicle
service drains and vehicle washing facilities, gravity separation and skimming
in a tank with a capacity of 1000 gallons or a retention time of at least
twenty four hours at the average daily flow, whichever is greater.
(D) For minor tumbling and cleaning of parts
wastewaters, gravity separation in a tank with a retention time of at least
twenty four hours at average daily flow.
(E) For furniture refinishing rinsewaters,
neutralization if acids are used in the process, and solids removal by gravity
separation or filtration.
(F) For
transfer station floor drains, gravity separation and skimming of floatable
materials.
(G) For incinerator
scrubber wastewaters, neutralization to a pH of between 6.0 and 10.0, and
gravity settling.
(H) For carpet
and upholstery cleaners, removal of lint through filtration.