reglab/statecodes huggingface dataset:
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart B - SOURCE DEVELOPMENT › Section 604.220 - Invasive Mussel Control

Current through Register Vol. 48, No. 28, July 12, 2024
a)
				When chemical treatment for the control of invasive mussels is permitted by the
				Agency:
1) chemical treatment must be in
				accordance with Subpart K;
2) plant
				safety items, including ventilation, operator protective equipment,
				eyewashes/showers, and cross connection control must be provided;
3) solution piping and diffusers must be
				installed within the intake pipe or in a suitable carrier pipe. Provisions must
				be made to prevent dispersal of chemicals into the water environment outside
				the intake. Diffusers must be located and designed to protect all intake
				structure components; and
4) The
				chemicals feeder must be interlocked with plant system controls to shut down
				automatically when the raw water flow stops.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart B - SOURCE DEVELOPMENT › Section 604.225 - Reservoirs

Current through Register Vol. 48, No. 28, July 12, 2024
Reservoirs must provide, where applicable, for:
a) removal of brush and trees to high water
				elevation;
b) protection from
				floods during construction; and
c)
				abandonment of all wells that will be inundated.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart B - SOURCE DEVELOPMENT › Section 604.230 - Groundwater Quantity

Current through Register Vol. 48, No. 28, July 12, 2024
a) A
				community water supply must determine groundwater source adequacy by the amount
				of water produced by each well pumping within its calculated safe
				yield.
b) Multiple Well Systems:
				When multiple wells are used, the combined delivery must equal or exceed the
				maximum average daily demand under Section 604.105(a) with the largest
				producing well out of service.
c)
				Single Well Systems: No community water supply, the construction or
				modification of which commences after July 26, 2019, may rely only on a single
				well for its water source. A community water supply, the construction of which
				commenced before and that is not modified after July 26, 2019, may rely on a
				single well for its water source, but must be placed on the critical review
				list under 35 Ill. Adm. Code
				602.107. For the
				purposes of this subsection, "modified" means when the fixed capital costs of
				the new components constructed within a 2-year period exceed 50% of the fixed
				capital cost of a comparable entirely new facility.
d) The well location must be selected to
				minimize the impact on other wells and other water resources.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart B - SOURCE DEVELOPMENT › Section 604.235 - Groundwater Quality

Current through Register Vol. 48, No. 28, July 12, 2024
a)
				Each community water supply using groundwater must collect and analyze one
				sample per well per month for total coliform bacteria. The analysis must be
				performed by a certified laboratory.
1) If a
				routine sample result is total coliform-positive, the community water supply
				must collect and analyze another sample within 24 hours after being notified of
				the positive result. The analysis must be performed by a certified
				laboratory.
2) Results that show
				the presence of coliform and have been confirmed by a sample taken under
				subsection (a)(1) must be reported to the Agency within 24 hours after being
				notified of the positive result of the sample taken under subsection
				(a)(1).
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart B - SOURCE DEVELOPMENT › Section 604.240 - General Well Construction

Current through Register Vol. 48, No. 28, July 12, 2024
a)
				Drilling fluids and additives must not impart any toxic substance to the water
				or promote bacterial contamination.
b) Minimum protected depths of drilled wells
				must provide watertight construction to exclude contamination and seal off
				formations that are, or may be, contaminated or yield undesirable
				water.
c) Surface or temporary
				steel casing used for construction must be capable of withstanding the
				structural load imposed during its installation and removal. Surface or
				temporary casing must be removed during or prior to grouting or it must be
				grouted in place when set according to subsection (i).
d) The well casing material must be steel.
				Permanent steel casing pipe must:
1) be new
				single steel casing pipe meeting AWWA A100, incorporated by reference in 35
				Ill. Adm. Code
				601.115,
				for water well construction;
2)
				have a minimum weight and thickness indicated in Table A;
3) be equipped with a drive shoe when driven;
				and
4) have full circumferential
				welds or threaded coupling joints.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart B - SOURCE DEVELOPMENT › Section 604.245 - Well Testing and Records

Current through Register Vol. 48, No. 28, July 12, 2024
a) The
				specific capacity of the production well must be determined by a drawdown test
				before the well is placed in service.
b) Aquifer property data must be:
1) determined by using published values of
				transmissivity and hydraulic conductivity;
2) estimated by using specific capacity;
				or
3) determined by using a pump
				test with an observation well.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart B - SOURCE DEVELOPMENT › Section 604.250 - Aquifer Types and Construction Methods

Current through Register Vol. 48, No. 28, July 12, 2024
a) Sand or Gravel Wells
1) Unless otherwise approved by the Agency
				under Section 604.145(b), the permanent casing and grout must extend at least
				25 feet below the original ground elevation.
2) If a temporary or a surface casing is
				used, it must be completely withdrawn.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart B - SOURCE DEVELOPMENT › Section 604.255 - Well Pumps, Discharge Piping, and Appurtenances

Current through Register Vol. 48, No. 28, July 12, 2024
a) Where line shaft pumps are used:
1) the casing must be firmly connected to the
				pump structure or have the casing inserted into a recess extending at least
				one-half inch into the pump base;
2) the pump foundation and base must be at
				least six inches above the finished floor elevation; and
3) lubricants must comply with Section
				604.105(f).
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart C - SOURCE WATER PROTECTION PLAN › Section 604.305 - Source Water Protection Plan Requirement and Contents

Current through Register Vol. 48, No. 28, July 12, 2024
Each community water supply that treats surface or
				  groundwater as a primary or emergency supply of water must develop a source
				  water protection plan that contains the following minimum elements:
a) a vision statement as set forth in Section
				604.310;
b) a source water
				assessment as set forth in Section 604.315;
c) the objectives set forth in Section
				604.320; and
d) an action plan as
				set forth in Section 604.325.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart C - SOURCE WATER PROTECTION PLAN › Section 604.310 - Vision Statement

Current through Register Vol. 48, No. 28, July 12, 2024
The vision statement must include the following:
a) the community water supply's policy and
				commitment to protecting source water;
b) an explanation of the community water
				supply's resources to protect source water;
c) an explanation of the barriers to
				protecting source water; and
d) the
				names of the individuals who developed the vision statement.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart C - SOURCE WATER PROTECTION PLAN › Section 604.315 - Source Water Assessment

Current through Register Vol. 48, No. 28, July 12, 2024
a) The
				source water assessment must contain the following information:
1) a statement of the importance of the
				source water;
2) a list of water
				supplies that obtain water from this community water supply;
3) a delineation of all sources of water used
				by the community water supply, including:
A)
				for surface water, description of the watershed, map of the watershed, and
				intake locations;
B) for
				groundwater, the well identification number, well description, well status, and
				well depth; a description of setback zones; and a description of the aquifer
				for each well;
4) a
				report on the quality of the source water for all sources of water delineated
				in subsection (a)(3), including:
A) when and
				where samples used to determine the quality of the source water were taken.
				These samples must be tested by a certified laboratory; and
B) the certified laboratory's
				results;
5) a report on
				the quality of the finished water;
6) an identification of potential sources of
				contamination to the source water;
7) the analysis of the source water's
				susceptibility to contamination; and
8) an explanation of the community water
				supply's efforts to protect its source water.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart C - SOURCE WATER PROTECTION PLAN › Section 604.320 - Source Water Protection Plan Objectives

Current through Register Vol. 48, No. 28, July 12, 2024
The source water protection plan must contain a list of the
				  community water supply's objectives for protecting source water. These
				  objectives can include meeting the requirements of any of the Sections in this
				  Subpart, including developing a vision statement or performing a source water
				  assessment. Objectives may also address the specific problems or issues
				  identified in the source water assessment and should consider current and
				  potential future issues.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart C - SOURCE WATER PROTECTION PLAN › Section 604.325 - Action Plan

Current through Register Vol. 48, No. 28, July 12, 2024
In the action plan, the community water supply must identify
				  the actions needed to achieve the community water supply's objectives
				  determined under Section 604.320. The action plan must include the
				  following:
a) descriptions of all
				projects, programs, and activities developed by the community water supply to
				meet the objectives listed in Section 604.320;
b) the community water supply's schedule for
				implementing projects, programs and activities;
c) an identification of the necessary
				resources to implement the plan; and
d) an identification of the potential
				problems with and obstacles to implementing the plan.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart C - SOURCE WATER PROTECTION PLAN › Section 604.330 - Submission

Current through Register Vol. 48, No. 28, July 12, 2024
a) A community
				water supply that first commenced construction after July 26, 2019, must
				develop and submit a source water protection plan simultaneously with the
				construction permit application.
b)
				A community water supply in existence as of July 26, 2019, must develop and
				submit to the Agency for approval a source water protection plan within the
				following time frame after July 26, 2019:
1)
				within 3 years, for a community water supply serving a population greater than
				50,000 persons;
2) within 4 years,
				for a community water supply serving a population of greater than 3,000 but
				less than or equal to 49,999 persons; or
3) within 5 years, for a community water
				supply serving a population of less than or equal to 2,999 persons.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart C - SOURCE WATER PROTECTION PLAN › Section 604.335 - Agency Approval

Current through Register Vol. 48, No. 28, July 12, 2024
The Agency, not later than 45 days after the receipt of the
				  source water protection plan, will either approve or disapprove the plan. If
				  the Agency takes no action within the 45 days, the community water supply may
				  deem the plan approved. A community water supply may waive the requirement that
				  the Agency take an action within the 45 days by so advising the Agency in
				  writing.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart C - SOURCE WATER PROTECTION PLAN › Section 604.340 - Evaluation and Revision

Current through Register Vol. 48, No. 28, July 12, 2024
The community water supply must review, and revise as
				  necessary, its source water protection plan no less frequently than every five
				  years. If the community water supply revises its source water protection plan,
				  it must submit the plan to the Agency for approval under Section
				  604.335.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart D - AERATION › Section 604.400 - General Requirements for Aeration

Current through Register Vol. 48, No. 28, July 12, 2024
a) All aerators, except those discharging to
				lime softening or clarification plants, must be protected from contamination by
				birds, insects, wind borne debris, rainfall and water draining off the exterior
				of the aerator. Screens must be 24 mesh.
b) A bypass must be provided when a single
				aeration unit is installed.
c) The
				stability of the water after aeration must be evaluated to determine the need
				for additional treatment under Subpart I.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart D - AERATION › Section 604.405 - Forced or Induced Draft Aeration

Current through Register Vol. 48, No. 28, July 12, 2024
Forced or induced draft aeration devices must be designed
				  to:
a) include a blower with a
				weatherproof motor in a tight housing and screened enclosure;
b) insure adequate counter current of air
				through the enclosed aerator column;
c) exhaust air directly to the outside
				atmosphere;
d) include a down
				turned and 24 mesh screened air outlet and inlet;
e) be such that air introduced in the column
				must be as free from obnoxious fumes, dust, and dirt as possible;
f) be such that sections of the aerator can
				be reached or removed for maintenance of the interior or installed in a
				separate aerator room;
g) provide
				loading at a rate of 1 to 5 gallons per minute for each square foot of total
				tray area (2.5 to 12.5 m/hr);
h)
				ensure that the water outlet is sealed;
i) discharge through a series of five or more
				trays with separation of trays not less than six inches;
j) provide distribution of water uniformly
				over the top tray; and
k) be of
				durable material resistant to the aggressiveness of the water and dissolved
				gases.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart D - AERATION › Section 604.410 - Spray Aeration

Current through Register Vol. 48, No. 28, July 12, 2024
Spray aeration design must provide:
a) a hydraulic head of between 5 and 25
				feet;
b) nozzles, with the size,
				number, and spacing of the nozzles being dependent on the flow rate, the space,
				and amount of head available;
c)
				nozzle diameters in the range of 1 to
				1.5 inches to minimize
				clogging; and
d) an enclosed basin
				to contain the spray, with any openings protected by a 24-mesh
				screen.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart D - AERATION › Section 604.415 - Pressure Aeration

Current through Register Vol. 48, No. 28, July 12, 2024
a)
				Pressure aeration may be used for oxidation purposes only. This process is not
				acceptable for the removal of dissolved gases.
b) Filters following pressure aeration must
				allow for the release of air.
c)
				Pressure aeration must be designed to
1)
				thoroughly mix compressed air with water being treated; and
2) provide air free of obnoxious fumes, dust,
				dirt and other contaminants.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart D - AERATION › Section 604.420 - Packed Tower Aeration

Current through Register Vol. 48, No. 28, July 12, 2024
a)
				Packed tower aeration (PTA) may be used for removing compounds with a Henry's
				Constant greater than 100 atm mol/mol at 120° C. Compounds with a Henry's
				Constant less than 10 may not be removed by PTA. For Henry's Constant values
				between 10 and 100, PTA may be used upon completion of a pilot study and
				approval by the Agency.
b) Process
				Design
1) Construction Permit Applications
				and Pilot Study
A) Before installing PTA, the
				community water supply must submit a construction permit application that
				includes Henry's Constant for the contaminant, the mass transfer coefficient,
				air pressure drop and stripping factor, height and diameter of unit, air to
				water ratio, packing depth, and surface loading rate.
B) Pilot testing is required for PTA used for
				compounds with Henry's Constant greater than 100 unless there is considerable
				past performance data on the contaminant to be treated, there is a
				concentration level similar to previous projects, and the Agency has approved
				the process design based on use of appropriate calculations without pilot
				testing. Proposals of this type must be discussed with the Agency prior to
				submission of any construction permit applications.
C) When a pilot test is required, the pilot
				test must:
i) evaluate a variety of loading
				rates and air to water ratios at the peak contaminant concentration;
				and
ii) give special consideration
				to removal efficiencies when multiple contaminations occur.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart D - AERATION › Section 604.425 - Other Methods of Aeration

Current through Register Vol. 48, No. 28, July 12, 2024
Other methods of aeration may be used if applicable to the
				  treatment needs. The treatment processes must be designed to meet the
				  particular needs of the water to be treated and must be approved by the Agency.
				  Such methods include:
a)
				spraying;
b) diffus ed
				air;
c) cascades;
d) mechanical aeration; or
e) natural draft aeration.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart E - CLARIFICATION › Section 604.500 - General Clarification Requirements

Current through Register Vol. 48, No. 28, July 12, 2024
a) All community water supplies designed to
				treat surface water must have a minimum of two clarification units. The
				clarifiers must be capable of meeting the plant design capacity with one
				clarifier removed from service.
b)
				For community water supplies treating groundwater under the direct influence of
				surface water, the community water supply must have a minimum of two
				clarification units if clarification is provided.
c) Community water supplies designed to treat
				groundwater will be required to have a minimum of two clarification units if
				clarification is provided.
d)
				Design of the clarification process must:
1)
				allow units to be taken out of service without disrupting operation;
2) start manually following
				shutdown;
3) minimize hydraulic
				head losses between units to allow future changes in processes without the need
				for repumping; and
4) if flow is
				split, provide a means of measuring and modifying the flow to each train or
				unit unless flow paths are equivalent and hydraulic controls are
				provided.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart E - CLARIFICATION › Section 604.505 - Coagulation

Current through Register Vol. 48, No. 28, July 12, 2024
a) For purposes of
				this Section, coagulation is a process using coagulant chemicals and mixing by
				which colloidal and suspended material are destabilized and agglomerated into
				settleable or filterable flocs, or both.
b) For community water supplies treating
				surface water using direct or conventional filtration, the use of a primary
				coagulant is required at all times.
c) The community water supply must submit
				with the construction permit application the design basis for the velocity
				gradient (G value) selected, considering the chemicals to be added and water
				temperature, color and other related water quality parameters.
d) Mixing - Mixing must be adequate to
				disperse chemicals in the basin. The detention period should be instantaneous,
				but not longer than 30 seconds, with mixing equipment capable of imparting a
				minimum velocity gradient (G) of at least 750 fps/ft.
e) Equipment - Basins must be designed or
				equipped to produce adequate mixing for all treatment flow rates. Static mixing
				may be considered where the flow is relatively constant and will be high enough
				to maintain the necessary turbulence for complete chemical reactions.
f) Location - the coagulation and
				flocculation basin must be as close together as possible.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart E - CLARIFICATION › Section 604.510 - Flocculation

Current through Register Vol. 48, No. 28, July 12, 2024
a) For purposes of
				this Section, flocculation is a process to enhance agglomeration or collection
				of smaller floc particles into larger, more easily settleable or filterable
				particles through gentle stirring by hydraulic or mechanical means.
b) Basin Design - Inlet and outlet design
				must minimize short-circuiting and destruction of floc. Series compartments are
				recommended to further minimize short-circuiting and to provide decreasing
				mixing energy with time. Basins must be designed so that individual basins may
				be isolated without disrupting plant operation. A drain and/or pumps must be
				provided to handle dewatering and sludge removal.
c) Detention - The detention time must be
				adequate for floc formation. A detention time of at least 30 minutes with
				consideration to using tapered (i.e., diminishing velocity gradient)
				flocculation is recommended. The flow-through velocity should be not less than
				0.5 nor greater than
				1.5 feet per
				minute.
d) Equipment - Agitators
				must be driven by variable speed drives, with the peripheral speed of paddles
				ranging from 0.5 to 3.0 feet per second. External, non-submerged motors are
				preferred.
e) Other Designs -
				Baffling may be used to provide for flocculation in small plants only after
				Agency approval. The design should be such that the velocities and flows
				recommended in subsection (c) will be maintained.
f) Superstructure - A superstructure over the
				flocculation basins may be required.
g) Piping - Flocculation and sedimentation
				basins must be as close together as possible. The velocity of flocculated water
				through pipes or conduits to settling basins must be no less than 0.5 nor
				greater than
				1.5 feet per second.
				Allowances must be made to minimize turbulence at bends and changes in
				direction.
h) Consideration should
				be given to the need for additional chemical feed in the future.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart E - CLARIFICATION › Section 604.515 - Sedimentation

Current through Register Vol. 48, No. 28, July 12, 2024
For purposes of this Section, sedimentation is a process that
				  allows particles to settle by gravity and typically precedes filtration. The
				  detention time for effective clarification is dependent upon a number of
				  factors related to basin design and the nature of the raw water. The following
				  criteria apply to conventional sedimentation units:
a) A minimum of four hours of settling time
				must be provided. This may be reduced to two hours for lime-soda softening
				facilities treating only groundwater. The Agency may approve reduced detention
				time when equivalent effective settling is demonstrated or when the overflow
				rate is not more than 0.5 gpm per square foot.
b) Inlet Devices - Inlets must be designed to
				distribute the water equally and at uniform velocities by using open ports,
				submerged ports, and similar entrance arrangements. A baffle should be
				constructed across the basin close to the inlet end and should project several
				feet below the water surface to dissipate inlet velocities and provide uniform
				flows across the basin.
c) Velocity
				- The velocity through a sedimentation basin must not exceed 0.5 feet per
				minute. The basins must be designed to minimize short-circuiting. Fixed or
				adjustable baffles must be provided as necessary to achieve the maximum
				potential for clarification.
d)
				Outlet Devices - Outlet weirs or submerged orifices must maintain velocities
				suitable for settling in the basin and minimize short-circuiting. Submerged
				orifices must be used if necessary to provide a volume above the orifices for
				storage when there are fluctuations in flow. Outlet weirs and submerged
				orifices must be designed as follows:
1) The
				rate of flow over the outlet weirs or through the submerged orifices must not
				exceed 20,000 gallons per day per foot of the outlet launder or orifice
				circumference;
2) Submerged
				orifices should not be located lower than 3 feet below the flow line;
				and
3) The entrance velocity
				through the submerged orifices must not exceed 0.5 feet per second.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart E - CLARIFICATION › Section 604.520 - Solids Contact Unit

Current through Register Vol. 48, No. 28, July 12, 2024
a) Adequate
				piping with sampling taps must be provided to allow for the collection of
				samples from various depths of the units.
b) Chemical Feed. Chemicals must be
				satisfactorily mixed in accordance with Section 604.1100(b).
c) The Agency may require a rapid mix device
				or chamber ahead of solids contact units to assure proper mixing of the
				chemicals applied. If required by the Agency, the mixing devices must be
				constructed to:
1) provide good mixing of the
				raw water with previously formed sludge particles; and
2) prevent deposition of solids in the mixing
				zone.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart E - CLARIFICATION › Section 604.525 - Tube or Plate Settlers

Current through Register Vol. 48, No. 28, July 12, 2024
a)
				Settler units consisting of variously shaped tubes or plates installed in
				multiple layers and at an angle to the flow may be used for sedimentation,
				following flocculation.
b) Tube or
				plate settlers must meet the following requirements:
1) Inlet and outlet design must maintain
				velocities suitable for settling in the basin and to minimize
				short-circuiting;
2) Plate units
				must be designed to minimize maldistribution across the units;
3) Drain piping from settler units must be
				sized to facilitate a quick flush of the settler units and to prevent flooding
				of other portions of the plant;
4)
				Outdoor installations must be protected against freezing, including sufficient
				freeboard above the top of the settlers;
5) Tubes must have a maximum application rate
				of 2 gpm per square foot of cross-sectional area, unless higher rates are shown
				through pilot plant or in-plant demonstration studies;
6) Plates must have a maximum application
				rate of 0.5 gpm per square foot, based
				on 80 percent of the projected horizontal plate area;
7) Flushing lines must be provided to
				facilitate maintenance and must be properly protected against backflow or
				back-siphonage;
8) Inlets and
				outlets must conform with Section
				604.515(b) and
				(d);
9) The units' support system must be able to
				carry the weight of the settler units when the basin is drained plus any
				additional weight to support maintenance; and
10) Settler units must accommodate:
A) A water or air jet system for cleaning
				their tubes or plates; and
B)
				Dropping their water level to allow cleaning with the system identified in
				subsection (b)(10)(A).
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart E - CLARIFICATION › Section 604.530 - Other High Rate Clarification Processes

Current through Register Vol. 48, No. 28, July 12, 2024
The Agency may approve high rate clarification processes upon
				  a demonstration of satisfactory performance under on site pilot plant
				  conditions or documentation of full-scale plant operation with similar raw
				  water quality conditions. The demonstration of documentation must include
				  justification for any reductions in detention times and/or increases in weir
				  loading rates. High rate clarification processes may include dissolved air
				  flotation, ballasted flocculation, and contact
				  flocculation/clarification.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart F - FILTRATION › Section 604.600 - Filtration

Current through Register Vol. 48, No. 28, July 12, 2024
a) Application of
				any one type of filter must be supported by water quality data representing a
				reasonable period of time to characterize the variations in water quality. The
				Agency may require pilot treatment studies to demonstrate the applicability of
				the method of filtration proposed.
b) Acceptable filters include the following
				types:
1) rapid rate gravity
				filters;
2) rapid rate pressure
				filters;
3) deep bed rapid rate
				gravity filters; and
4)
				biologically active filters.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart F - FILTRATION › Section 604.605 - Rapid Rate Gravity Filters

Current through Register Vol. 48, No. 28, July 12, 2024
a)
				The use of rapid rate gravity filters requires pretreatment.
b) For community water supplies treating
				surface water, groundwater under the direct influence of surface water, or
				using lime soda softening treatment, unless otherwise approved by the Agency
				under Section 604.145(b), the
				nominal filtration rates must not exceed 3
				gal/min/ft2 of filter area for single media filters
				and 5 gal/min/ft2 for multi-media filters.
				Filtration rates must be reduced when treated water turbidity exceeds the
				standards in 35 Ill. Adm. Code 611.
c) For community water supplies treating
				groundwater and not using lime soda softening treatment, unless otherwise
				approved by the Agency under Section
				604.145(b), the
				rate of filtration must not exceed 4 gal/min/ft2 of
				filter area.
d) Number of Filter
				Units
1) A minimum of two units must be
				provided. Each unit must be capable of meeting the plant design capacity or the
				projected maximum daily demand at the approved filtration rate.
2) Where more than two filter units are
				provided, the filters must be capable of meeting the plant design capacity at
				the approved filtration rate with one filter removed from service.
3) Where declining rate filtration is
				provided, the variable aspect of filtration rates and the number of filters
				must be considered when determining the design capacity for the
				filters.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart F - FILTRATION › Section 604.610 - Rapid Rate Pressure Filters

Current through Register Vol. 48, No. 28, July 12, 2024
a)
				Pressure filters must not be used in the filtration of surface water,
				groundwater under the direct influence of surface water, or water treated by
				lime soda softening.
b) The rate of
				filtration must not exceed 4 gal/min/ft2 of filter
				area unless otherwise approved by the Agency under Section
				604.145(b).
c) Minimum criteria at
				Section 604.605(e) and (g) relative to structural details, hydraulics, and
				filter media provided for rapid rate gravity filters also apply to pressure
				filters when appropriate.
d) Number
1) A minimum of two units must be provided.
				Each unit must be capable of meeting the plant design capacity or the projected
				maximum daily demand at the approved filtration rate.
2) When more than two filter units are
				provided, the filters must be capable of meeting the plant design capacity at
				the approved filtration rate with one filter removed from service.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart F - FILTRATION › Section 604.615 - Deep Bed Rapid Rate Gravity Filters

Current through Register Vol. 48, No. 28, July 12, 2024
Deep bed rapid rate gravity filters refers to rapid rate
				  gravity filters with filter material depths equal to or greater than 48 inches.
				  Filter media sizes are typically larger than those listed in Section
				  604.605(f)(4).
a) Before a community
				water supply may use deep bed rapid rate filters, a pilot study must be
				completed and approved by the Agency.
b) The final filter design must be based on
				the pilot plant studies and must comply with all applicable portions of Section
				604.605.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart F - FILTRATION › Section 604.620 - Biologically Active Filtration

Current through Register Vol. 48, No. 28, July 12, 2024
Biologically active filtration refers to the filtration of
				  surface water or a groundwater with iron, manganese or significant natural
				  organic material, which includes the establishment and maintenance of
				  biological activity within the filtration media. The objectives of biologically
				  active filtration may include control of disinfection byproduct precursors;
				  increased disinfectant stability; reduction of substrates for microbial
				  regrowth; breakdown of small quantities of synthetic organic chemicals; and
				  oxidation of ammonia-nitrogen, iron and manganese. Biological activity can have
				  an adverse impact on turbidity, particle and microbial pathogen removal,
				  disinfection practices, head loss development, and filter run times and
				  distribution system corrosion.
a)
				Before use of biologically active filters, the community water supply must
				conduct a pilot study and obtain Agency approval. Pilot study objectives must
				be clearly defined and must ensure the microbial quality of the filtered water
				under all anticipated conditions of operation.
1) The pilot study must be of sufficient
				duration to ensure establishment of full biological activity; often greater
				than three months is required.
2)
				The pilot study must establish empty bed contact time, surface filtration
				hydraulic loading rate, substrate loading rate per unit filter media volume,
				and treatment efficiency for removal or reduction of concentration of
				parameters targeted for the pilot study.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart G - DISINFECTION › Section 604.700 - Disinfection Requirement

Current through Register Vol. 48, No. 28, July 12, 2024
a)
				Disinfection, in addition to continuous chlorination, is required for all
				sources utilizing surface water, groundwater under the direct influence of
				surface water, groundwater obtained from unconfined fractured bedrock,
				groundwater with a total coliform presence, and groundwater treated in basins
				open to the atmosphere to meet the inactivation of pathogens treatment
				objectives as provided in Section 604.720 and 35 Ill. Adm. Code 611.
b) Disinfection may be accomplished with
				chlorine, chloramines, chlorine dioxide, ozone, or ultraviolet light.
				Chloramines must not be used as a primary disinfectant, unless otherwise
				approved by the Agency under Section 604.145(b).
c) Continuous chlorination is required for
				all community water supplies unless the chlorine residual requirements of
				Section 604.725 are met or the community water supply is exempt under Section
				17(b) of the Act.
d) Notification
				of a change in disinfection practices and the schedule for the changes must be
				made known to the public; particularly to hospitals, kidney dialysis
				facilities, and fish breeders, as chlorine dioxide and its byproducts may have
				similar effects as chloramines.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart G - DISINFECTION › Section 604.705 - Chlorination Equipment

Current through Register Vol. 48, No. 28, July 12, 2024
a)
				Procedure for Submitting Plans and Specifications - Design documents for
				chlorination must be prepared and submitted in accordance with 35 Ill. Adm.
				Code 602.
b) Chlorination equipment
				must:
1) be large enough to satisfy the
				immediate chlorine demand and give a measurable residual of at least 2.0 mg/L
				of total chlorine under all operating conditions after contact;
2) be capable of feeding chlorine to the
				water being treated at a dosage rate of at least 5.0 mg/L, except when the
				water has a high chlorine demand. Factors in determining chlorine demand are:
A) pH;
B) water temperature;
C) contact time;
D) presence in the water of substances having
				chlorine demand such as hydrogen sulfide, iron, manganese and nitrogenous
				compounds including ammonia; and
E)
				supplemental treatment such as aeration that reduces chlorine demand;
3) be provided in duplicate when
				operating conditions do not allow repair of the chlorinator during off-pumping
				periods;
4) be provided in
				duplicate, installed and operational, at community water supplies treating
				surface water, groundwater under the direct influence of surface water, and
				groundwater with a history of total coliform positive results; and
5) include spare parts for emergency repairs
				consisting of at least the commonly expendable parts such as glassware,
				fittings, hose clamps, and gaskets.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart G - DISINFECTION › Section 604.710 - Points of Application

Current through Register Vol. 48, No. 28, July 12, 2024
Provisions must be made for the capability to add a
				  disinfectant into or prior to any aeration, settling, or filtration process,
				  unless the process involves biological treatment, in which case the
				  disinfectant must be added after the biological treatment.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart G - DISINFECTION › Section 604.715 - Contact Time

Current through Register Vol. 48, No. 28, July 12, 2024
a) Unless
				otherwise approved by the Agency under Section 604.145(b), a minimum chlorine
				contact time of 60 minutes must be provided at all plants treating surface
				water, groundwater under the direct influence of surface water, groundwater
				with basins open to the atmosphere, and groundwater obtained from unconfined,
				fractured bedrock. The equivalent baffling factor must be greater than or equal
				to 0.3 to prevent short-circuiting. The 60-minute contact time must be
				calculated based on the following formula:
Click
				  here to view image
b) For the purposes of this Section, contact
				time is measured as follows:
1) When the
				treatment process includes filtration, contact time is measured as the time
				following filtration of the water until the water reaches the first
				user.
2) When the treatment process
				does not include filtration, contact time is measured as the time following
				chlorination of water until the water reaches the first user.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart G - DISINFECTION › Section 604.720 - Inactivation of Pathogens

Current through Register Vol. 48, No. 28, July 12, 2024
a) At
				plants treating surface water or groundwater under the direct influence of
				surface water, a disinfectant must be added to provide:
1) a minimum 0.5 -log inactivation of Giardia
				lamblia cysts; and
2) a minimum
				2-log inactivation of viruses.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart G - DISINFECTION › Section 604.725 - Residual Chlorine

Current through Register Vol. 48, No. 28, July 12, 2024
a) A
				minimum free chlorine residual of 0.5 mg/L or a minimum combined chlorine
				residual of 1.0 mg/L must be maintained in all active parts of the distribution
				system at all times.
b) Community
				water supplies must monitor chlorine residual to determine the amount and type
				of residuals existing at different points in the distribution system.
c) Community water supplies must not mix
				water sources with free chlorine and combined chlorine residual.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart G - DISINFECTION › Section 604.730 - Continuous Chlorine Analyzers

Current through Register Vol. 48, No. 28, July 12, 2024
Community water supplies that rely on chlorination for
				  disinfection under Section 604.700(a) must have continuous chlorine residual
				  analyzers with alarm capability that alerts the community water supply if
				  chlorine residuals at the entry point to the distribution system are below the
				  limits established in Section 604.725.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart G - DISINFECTION › Section 604.735 - Chlorinator Piping

Current through Register Vol. 48, No. 28, July 12, 2024
a)
				Cross-Connection Protection
1) The chlorinator
				piping must be designed to prevent contamination of the treated
				water.
2) For all systems required
				to disinfect under Section
				604.700, piping must be arranged
				to prevent backflow or back-siphonage between multiple points of chlorine
				application.
3) The water supply to
				each eductor must have a separate shutoff valve.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart H - SOFTENING › Section 604.800 - Lime or Lime-soda Process

Current through Register Vol. 48, No. 28, July 12, 2024
a)
				Design standards for rapid mix, flocculation and sedimentation are in Subpart
				E.
b) When split treatment is used,
				an accurate means of measuring and splitting the flow must be
				provided.
c) Before installation of
				lime or lime-soda processes, the community water supply must determine the
				carbon dioxide content of the raw water to evaluate the efficacy of installing
				aeration treatment.
d) Lime must be
				fed directly into the rapid mix basin or mixing chamber.
e) Rapid mix detention time must be no longer
				than 30 seconds, with adequate velocity gradients to keep the lime particles
				dispersed.
f) The softening process
				must include equipment for stabilization of water softened by the lime or
				lime-soda.
g) The use of excess
				lime is not an acceptable substitute for disinfection.
h) The plant processes must be manually
				started following shut down.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart H - SOFTENING › Section 604.805 - Cation Exchange Process

Current through Register Vol. 48, No. 28, July 12, 2024
a)
				Pre-treatment under Section
				604.1010(b) or
				(c) is required when the content of iron,
				manganese, or a combination of the two is 1 mg/L or more.
b) Design requirements must provide:
1) automatic regeneration based on the volume
				of water softened; and
2) a manual
				override on all automatic controls.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart I - STABILIZATION › Section 604.900 - General Stabilization Requirements

Current through Register Vol. 48, No. 28, July 12, 2024
a) Water distributed by community water
				supplies must be stable so as to not cause a violation of 35 Ill. Adm. Code
				601.101(a).
b) The following water quality parameters of
				finished water must be evaluated to ensure that water quality parameters
				minimize corrosion and minimize deposition of excess calcium carbonate
				(CaCO3) scale throughout the distribution system of the
				community water supply:
1) alkalinity (as
				CaCO3);
2)
				total hardness (as CaCO3);
3) calcium hardness (as
				CaCO3);
4)
				temperature;
5) pH;
6) chloride;
7) sulfate;
8) total dissolved solids;
9) oxidation reduction potential;
10) conductivity;
11) iron;
12) manganese;
13) orthophosphate, if applicable;
				and
14) silica, if
				applicable.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart I - STABILIZATION › Section 604.905 - Carbon Dioxide Addition

Current through Register Vol. 48, No. 28, July 12, 2024
a)
				Unless carbon dioxide addition is provided in the form of a carbonic acid and
				water solution under pressure, recarbonation basin design must provide:
1) a total detention time of 20 minutes;
				and
2) a depth that will provide a
				diffuser submergence of not less than 7.5 feet nor greater submergence than
				recommended by the manufacturer.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart I - STABILIZATION › Section 604.910 - Phosphates

Current through Register Vol. 48, No. 28, July 12, 2024
Phosphate solution must be kept covered and disinfected by
				  carrying approximately 10 mg/L free chlorine residual unless the phosphate is
				  not able to support bacterial growth and the phosphate is being fed from the
				  covered shipping container. Phosphate solutions having a pH of 2.0 or less may
				  also be exempted from this requirement by the Agency.
Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA › Subpart I - STABILIZATION › Section 604.915 - Split Treatment

Current through Register Vol. 48, No. 28, July 12, 2024
A lime softening water treatment plant can be designed using
				  "split treatment" in which raw water is blended with lime softened water to
				  partially stabilize the water prior to secondary clarification and filtration.
				  Treatment plants designed to utilize "split treatment" should also contain
				  facilities for further stabilization by other methods.