reglab/statecodes huggingface dataset:
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter J - SLUDGE TREATMENT UNITS › Section 217.241 - General Requirements

Current through Reg. 49, No. 28; July 12, 2024
(a) For
				  purposes of this subchapter, sludge processing includes thickening,
				  stabilization, and dewatering.
(b)
				  A design must base the selection and operation of the sludge processing units
				  on the desired final sludge product.
(c) A wastewater treatment facility that
				  disposes of sludge under Chapter 312 of this title (relating to Sludge Use,
				  Disposal, and Transportation) must stabilize the sludge according to the
				  requirements of that chapter.
(d) A
				  wastewater treatment facility that disposes of sludge under Chapter 330 of this
				  title (relating to Municipal Solid Waste) must comply with the requirements of
				  that chapter.
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter J - SLUDGE TREATMENT UNITS › Section 217.242 - Control of Sludge and Supernatant Volumes

Current through Reg. 49, No. 28; July 12, 2024
(a) Supernatant, filtrate, or centrate
				  resulting from sludge processing must be returned to the headworks of the
				  wastewater treatment facility, the influent lift station, or to a point
				  preceding an aeration system or secondary treatment unit.
(b) A sludge processing unit must limit
				  digester supernatant liquor volume to the greatest extent
				  practicable.
(c) Returned
				  supernatant, filtrate, or centrate from a sludge processing unit must not
				  interfere with wastewater treatment processes in another treatment
				  unit.
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter J - SLUDGE TREATMENT UNITS › Section 217.243 - Sludge Pipes

Current through Reg. 49, No. 28; July 12, 2024
(a) Each pipe
				  associated with a sludge processing unit must have a slope that ensures the
				  flow of sludge.
(b) A pipe under a
				  stationary structure must allow a blockage to be easily eliminated by rodding
				  or a sewer-cleaning device.
(c) A
				  gravity pipe must have uniform grade and alignment.
(d) The slope of a gravity discharge pipe
				  must not be less than 3.0%.
(e) The
				  minimum diameter for a pipe associated with sludge processing is shown in
				  Figure: 30 TAC §217.243(e):
Attached Graphic
(f) The available head on a
				  discharge using a gravity withdrawal pipe must be at least 4.0 feet.
(g) A gravity withdrawal pipe from a
				  clarifier must allow for the removal of sludge.
(h) Each sludge pipe must include a means to
				  observe the quality of the supernatant from each of the withdrawal
				  outlets.
(i) Each individual sludge
				  processing unit must have a dedicated means of dewatering.
(j) Pipes located inside a digestion tank
				  must be designed for use in corrosive environments and must be sufficiently
				  supported to prevent damage to the pipe or adjacent equipment.
(k) A sludge pipe must not contain any bends
				  that form an acute angle with the pipe.
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter J - SLUDGE TREATMENT UNITS › Section 217.244 - Sludge Pumps

Current through Reg. 49, No. 28; July 12, 2024
(a) A sludge
				  transfer pump size must be based on the quantity and character of the solids
				  load.
(b) A mechanical pumping
				  system must provide the required firm pumping capacity with the largest sludge
				  pumping unit out of service.
(c) A
				  centrifugal sludge pump must have a positive suction head, unless the pump
				  includes a priming device.
(d) A
				  positive displacement pump or other type of pump must have demonstrated solids
				  handling capability for handling sludge.
(e) A positive suction head of 24 inches or
				  more is required for all sludge pumps.
(f) An air lift pump may be used as a sludge
				  pump, and must comply with requirements of §
										217.162 of
				  this title (relating to Air Lift Pump Design).
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter J - SLUDGE TREATMENT UNITS › Section 217.245 - Exclusion of Grit, Grease, and Debris from Sludge Processing Units

Current through Reg. 49, No. 28; July 12, 2024
(a) A wastewater
				  treatment facility must minimize the amount of grit, debris, oil, and grease
				  entering a sludge processing unit.
(b) A sludge processing unit must be designed
				  for the final use or final disposal of the various solids generated during the
				  treatment of domestic sewage.
(c)
				  If sludge will be land applied, a sludge processing unit must remove and
				  separately dispose of debris, grit, and grease before land application of the
				  sludge.
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter J - SLUDGE TREATMENT UNITS › Section 217.246 - Ventilation and Odor Control

Current through Reg. 49, No. 28; July 12, 2024
(a) A
				  design must include sufficient ventilation to eliminate an accumulation of
				  fumes or gases at a level that could adversely impact human health, safety,
				  welfare, or the environment.
(b) An
				  enclosed area that is accessible to individuals must have automatic mechanical
				  ventilation. Automatic mechanical ventilation consists of:
(1) a continuous ventilation system that
				  provides at least one complete air exchange every 10 minutes; or
(2) an intermittent ventilation system that
				  provides at least one complete air exchange every two minutes.
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter J - SLUDGE TREATMENT UNITS › Section 217.247 - Chemical Pretreatment of Sludge

Current through Reg. 49, No. 28; July 12, 2024
(a)
				  All chemicals used to treat sludge must be compatible with the operation of the
				  sludge processing unit and must not adversely affect any other treatment unit
				  or the receiving waters.
(b) The
				  engineering report must justify appropriate chemicals and feed ranges. A pilot
				  plant study or data from a treatment unit must be used. The organic, metal, and
				  hydraulic loadings at the pilot plant must be within 25% of the design organic,
				  metal, and hydraulic loadings.
(c)
				  Each chemical must be handled, stored, and disposed of according to its safety
				  data sheet.
(d) A liquid chemical
				  storage tank must have :
(1) a liquid level
				  indicator; and
(2) an emergency
				  overflow receiving basin or drain capable of retaining any spill.
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter J - SLUDGE TREATMENT UNITS › Section 217.248 - Sludge Thickening

Current through Reg. 49, No. 28; July 12, 2024
(a) If a sludge
				  thickening system is used, the following criteria are required:
(1) Capacity. The maximum monthly sludge
				  production rate must be used as the basis for sludge thickening system sizing
				  and design.
(2) Flexibility.
(A) A sludge thickening system must have a
				  bypass to the digester.
(B) A
				  wastewater treatment facility with a design flow greater than 1.0 million
				  gallons per day must have:
(i) at least two
				  sludge thickening units;
(ii) an
				  alternate means of sludge thickening; or
(iii) an alternate sludge disposal
				  method.
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter J - SLUDGE TREATMENT UNITS › Section 217.249 - Sludge Stabilization

Current through Reg. 49, No. 28; July 12, 2024
(a) Design
				  Requirements. The design requirements for the stabilization processes in this
				  section are based on only one stabilization process being used at the
				  wastewater treatment facility.
(b)
				  Variance. An owner must request a variance in accordance with §
										217.4 of
				  this title (relating to Variances) if a design includes a series of two or more
				  stabilization processes. Any deviations from the requirements of this section
				  must be documented in the variance request.
(c) Anaerobic Digestion.
(1) A wastewater treatment facility with a
				  design flow exceeding 0.4 million gallons per day must have at least two
				  anaerobic digesters.
(2) Anaerobic
				  digesters may be operated in series or in parallel. Each anaerobic digester may
				  be used for treating sludge from both primary and secondary
				  clarifiers.
(3) Each anaerobic
				  digester must have a means for transferring a portion of its contents to
				  another anaerobic digester.
(4) A
				  wastewater treatment facility that has been granted a variance to operate
				  without multiple anaerobic digesters must have an emergency storage basin for
				  storing sludge during times when the anaerobic digester needs to be taken out
				  of service.
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter J - SLUDGE TREATMENT UNITS › Section 217.250 - Sludge Dewatering

Current through Reg. 49, No. 28; July 12, 2024
(a) The
				  engineering report must include a justification for the proposed sludge
				  dewatering units, including design calculations, results from any pilot
				  studies, all assumptions, and appropriate references.
(b) The design of a dewatering unit must be
				  based on mass balance principles.
(c) General Requirements.
(1) Centrate or Filtrate Recycle.
(A) The drainage from beds and centrate or
				  filtrate from dewatering units must be returned to the headworks of the
				  wastewater treatment facility for treatment.
(B) The design of a treatment unit downstream
				  from a dewatering unit must be based on the organic load from the centrate or
				  filtrate recycle.
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter J - SLUDGE TREATMENT UNITS › Section 217.251 - Sludge Storage

Current through Reg. 49, No. 28; July 12, 2024
(a) This section
				  applies to the storage of sludge after processing but before final disposal or
				  removal from the wastewater treatment facility site.
(b) Sludge in liquid, dewatered, or dry form
				  may be stored at the wastewater treatment facility if the solids have been
				  stabilized in a treatment process.
(c) General Storage Requirements.
(1) A sludge storage facility must prevent
				  nuisance odor conditions and minimize vector attraction.
(2) A sludge storage facility must provide
				  storage of waste sludge separate from a biological treatment process.
(3) The design of a sludge storage facility
				  must be based on process design, sludge age, waste stream concentration,
				  operational hours, operational volume in tanks, decant or dewatering volumes
				  and characteristics, time frames needed for decanting or dewatering, and volume
				  needed for storage and sampling.
(4) The engineering report must include a
				  solids management plan that describes a method for managing the waste solids
				  that will maintain the design sludge age for a biological process.
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter J - SLUDGE TREATMENT UNITS › Section 217.252 - Final Use or Disposal of Sludge

Current through Reg. 49, No. 28; July 12, 2024
(a) The engineering report must identify the
				  final use or final disposal of the sludge. The use, disposal, and
				  transportation of sludge must be conducted in accordance with the requirements
				  contained in Chapter 312 of this title (relating to Sludge Use, Disposal, and
				  Transportation) or in Chapter 330 of this title (relating to Municipal Solid
				  Waste).
(b) Quantities of Sludge.
The quantity of solids generated by the treatment process
					 must be estimated using a mass-balance approach or actual data from a similar
					 full-scale wastewater treatment facility or pilot study. The methods,
					 calculations, and analyses used to estimate quantities of solids must be
					 included in the engineering report.
(c) Final Disposition. The sludge use or
				  disposal option must be based on the pathogen and vector attraction
				  characteristics of the sludge.
(d)
				  Sludge Constituents.
(1) The concentrations of
				  metals in sludge must be determined using methods approved in 40 Code of
				  Federal Regulations §136.3 and must be less than the levels specified in
				  §
											312.63
				  of this title (relating to Metal Limits (Other Than Domestic
				  Septage)).
(2) A sludge processing
				  system must reduce pathogens in sludge to levels that comply with §
											312.82 of this
				  title (relating to Pathogen Reduction).
(3) A sludge processing system must produce
				  digested sludge that complies with §
											312.83
				  of this title (relating to Vector Attraction Reduction).
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter K - CHEMICAL DISINFECTION › Section 217.271 - Gaseous Chlorine Disinfection and Sulfur Dioxide Dechlorination System Redundancy Requirements

Current through Reg. 49, No. 28; July 12, 2024
(a) Each
				  gaseous chlorine disinfection and sulfur dioxide dechlorination system must
				  include the number of cylinders required for normal operation at peak flow,
				  plus at least one additional cylinder.
(b) Gaseous chlorine disinfection systems and
				  sulfur dioxide dechlorination systems must include a device that automatically
				  switches between cylinders in a manner that ensures continuous disinfection and
				  dechlorination.
(c) A wastewater
				  treatment facility must have sufficient space to store at least as many empty
				  cylinders as the number of cylinders required for normal operation at peak
				  flow.
(d) A gaseous chemical
				  delivery system must meet the pounds per day requirements in §
										217.272
				  of this title (relating to Capacity and Sizing of Gaseous Chlorine Disinfection
				  and Sulfur Dioxide Dechlorination) when the largest chlorinator, sulfonator, or
				  evaporator is out of service.
(e)
				  If an injector water supply requires a booster pump, a duplicate backup pump is
				  required.
(f) A gaseous chemical
				  delivery system must include an emergency power source capable of operating the
				  chlorination and dechlorination systems during an extended power outage, in
				  accordance with §
										217.36
				  of this title (relating to Emergency Power Requirements).
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter K - CHEMICAL DISINFECTION › Section 217.272 - Capacity and Sizing of Gaseous Chlorine Disinfection and Sulfur Dioxide Dechlorination Systems

Current through Reg. 49, No. 28; July 12, 2024
(a) The capacity of
				  a chlorine or a sulfur dioxide gas-withdrawal system must be based on the peak
				  flow, in compliance with §
										217.32(a)(1)
				  of this title (relating to Organic Loadings and Flows for New Wastewater
				  Treatment Facilities) and Equation K.1. in Figure: 30 TAC §217.272(a).
Attached Graphic
(b) Table K.1. in Figure: 30 TAC
				  §217.272(b) establishes the minimum acceptable design chlorine dosage for
				  disinfection:
Attached Graphic
(c) At the point of
				  dechlorination, a dechlorination system must provide at least one unit of
				  sulfur dioxide gas for each unit of residual chlorine.
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter K - CHEMICAL DISINFECTION › Section 217.273 - Cylinder Requirements for Gaseous Chlorine Disinfection and Sulfur Dioxide Dechlorination Systems

Current through Reg. 49, No. 28; July 12, 2024
(a)
				  Cylinder Withdrawal Rates for Chlorine and Sulfur Dioxide Gases.
(1) Gas Withdrawal. The gas withdrawal rate
				  per cylinder for chlorine and sulfur dioxide cylinders must be based on
				  Equation K.2. and the variables from Table K.2. in Figure: 30 TAC
				  §217.273(a)(1).
Attached Graphic
(A) If the chlorine or sulfur dioxide
				  cylinders are not stored in a temperature-controlled enclosure, the engineering
				  report must include the ambient temperature based on the lowest consecutive
				  seven-day average of the average daily local temperatures over the last ten
				  years, as measured at the nearest National Oceanic and Atmospheric
				  Administration's National Weather Service weather station with at least ten
				  years of records.
(B) Heating
				  blankets on chlorine gas cylinders are prohibited.
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter K - CHEMICAL DISINFECTION › Section 217.274 - Dosage Control for Gaseous Chlorine Disinfection and Sulfur Dioxide Dechlorination Systems

Current through Reg. 49, No. 28; July 12, 2024
Gaseous chlorine and sulfur dioxide systems must include
					 automatic dosage control that adjusts the dosage relative to the flow of the
					 effluent stream.
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter K - CHEMICAL DISINFECTION › Section 217.275 - Requirements for 150 Pound Cylinders used in Gaseous Chlorine Disinfection and Sulfur Dioxide Dechlorination Systems

Current through Reg. 49, No. 28; July 12, 2024
(a) Heated Rooms.
(1) A chlorine and sulfur dioxide system that
				  uses 150 pound cylinders must be located indoors at a minimum room temperature
				  of 65 degrees Fahrenheit. This provision applies to all chemical feed
				  equipment, including all connected cylinders, the chlorinators, and the
				  sulfonators.
(2) An unconnected
				  chlorine or sulfur dioxide cylinder may be stored outdoors, but the cylinder
				  must reach a surface temperature of at least 65 degrees Fahrenheit before it is
				  connected to a system.
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter K - CHEMICAL DISINFECTION › Section 217.276 - Requirements for One-Ton and Larger Cylinders used in Gas-Withdrawal Chlorine Disinfection and Sulfur Dioxide Dechlorination Systems

Current through Reg. 49, No. 28; July 12, 2024
(a) Heated Rooms. The chlorinators and
				  sulfonators for a system using one-ton cylinders must be located indoors and
				  maintained at a minimum room temperature of 65 degrees Fahrenheit.
(b) Outdoor Storage.
(1) If one-ton cylinders are stored outdoors,
				  the system sizing must be done in accordance with §
											217.273(a)
				  of this title (relating to Cylinder Requirements for Gaseous Chlorine
				  Disinfection and Sulfur Dioxide Dechlorination Systems). Calculations
				  supporting system sizing must be included in the engineering report.
(2) If a one-ton cylinder is stored outdoors,
				  it must be kept in a storage structure that:
(A) protects the cylinder from direct
				  sunlight; and
(B) allows safe
				  removal and replacement of a cylinder.
(3) A one-ton cylinder stored outdoors may be
				  connected to heated pipes to prevent gas from liquefying in the transfer
				  pipes.
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter K - CHEMICAL DISINFECTION › Section 217.277 - Requirements for One-Ton and Larger Cylinders used in Liquid-Withdrawal Chlorine Disinfection and Sulfur Dioxide Dechlorination Systems

Current through Reg. 49, No. 28; July 12, 2024
(a) Heated Rooms.
				  The chlorinators and sulfonators must be located indoors at a minimum room
				  temperature of 65 degrees Fahrenheit.
(b) Outdoor Storage. The chlorine and sulfur
				  dioxide cylinders for systems using liquid withdrawal may be stored outdoors
				  without reducing the withdrawal rates calculated from §
										217.273(a)(2)
				  of this title (relating to Cylinder Requirements for Gaseous Chlorine
				  Disinfection and Sulfur Dioxide Dechlorination Systems).
(c) Separation. The separation requirements
				  for a one-ton cylinder liquid-withdrawal systems are the same as those for a
				  one-ton cylinder gas-withdrawal system under §
										217.278(e)
				  of this title (relating to Safety Requirements for Gaseous Chlorine
				  Disinfection and Sulfur Dioxide Dechlorination Systems).
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter K - CHEMICAL DISINFECTION › Section 217.278 - Safety Requirements for Gaseous Chlorine Disinfection and Sulfur Dioxide Dechlorination Systems

Current through Reg. 49, No. 28; July 12, 2024
(a)
				  Floor Drains. A floor drain from a chlorine or sulfur dioxide feed or storage
				  room must not drain to a pipe system connected to any other room of the
				  wastewater treatment facility. Drainage must be routed for safe disposal or for
				  further processing at a rate that does not disrupt a treatment process or
				  violate a water quality permit requirement.
(b) Doors and Windows.
(1) Each door in a chlorine or sulfur dioxide
				  room must:
(A) open to the outside of the
				  building; and
(B) include panic
				  hardware.
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter K - CHEMICAL DISINFECTION › Section 217.279 - Equipment and Material Requirements for Gaseous Chlorine Disinfection and Sulfur Dioxide Dechlorination Systems

Current through Reg. 49, No. 28; July 12, 2024
(a)
				  All equipment and material used in a disinfection and dechlorination system
				  must meet the manufacturer's recommendations.
(b) A 150 pound cylinder must be stored
				  vertically and secured by a clamp or chain to prevent it from falling over. A
				  one-ton cylinder
(c) Measurements.
				  A gaseous chlorine and sulfur dioxide system must have a scale designed for
				  determining the amount of chemical remaining in the connected
				  cylinders.
(d) Pressure Pipe
				  Systems for Gas Transport.
(1) Gas transport
				  pressure pipes must be at least equivalent to Schedule 80 black seamless steel
				  pipe. Gas transport fittings must be at least equivalent to 2,000 pound forged
				  steel fittings.
(2) The use of
				  polyvinyl chloride (PVC) in a pressure pipe system is prohibited.
(3) A one-ton cylinder system must use a gas
				  filter upstream of a pressure-reducing valve.
(4) A pressure pipe system must have a
				  pressure-reducing valve if:
(A) the system
				  has more than 20 linear feet of supply pipes;
(B) the system is a gaseous sulfur dioxide
				  system with a heating blanket; or
(C) there are pressure pipes on the discharge
				  side of an evaporator.
(5) A pressure pipe on the gas discharge side
				  of an evaporator must have a rupture disk and a high-pressure alarm to warn
				  wastewater treatment facility staff of disk rupture.
(6) A gas pipe entering a chlorinator or
				  sulfonator must have a heated leg drop sediment trap.
(7) A gaseous sulfur dioxide system must have
				  a seat and stem constructed of material with corrosion resistance and brittle
				  strength at least equivalent to 316 stainless steel.
(8) A gaseous chlorine system must have at
				  least the equivalent of a Monel® seat and stem.
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter K - CHEMICAL DISINFECTION › Section 217.280 - Design of Sodium Hypochlorite Disinfection and Sodium Bisulfite Dechlorination Systems

Current through Reg. 49, No. 28; July 12, 2024
(a) Redundancy.
				  Sodium hypochlorite and sodium bisulfite systems must include at least two
				  chemical solution pumps and must ensure that the capacity requirements in
				  subsection (b) of this section are met with the largest pump out of
				  service.
(b) Capacity and Sizing.
				  The size of a chemical liquid solution pump and pipe system must be determined
				  as follows:
(1) Sodium Hypochlorite.
(A) Pounds Per Day of Chlorine Required.
				  Figure: 30 TAC §
												217.272(b),
				  Table K.1. and Figure: 30 TAC §
												217.272(a),
				  Equation K.1. must be used to determine the pounds per day of chlorine
				  required.
(B) Chlorine
				  Determination. The pounds of available chlorine per gallon of sodium
				  hypochlorite solution must be determined using values and appropriate
				  references supplied by the chemical manufacturer.
(C) Gallons per Hour Determination. In order
				  to size the chemical metering equipment, the gallons per hour must be
				  calculated using Equation K.4. in Figure: 30 TAC §217.280(b)(1)(C).
Attached Graphic
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter K - CHEMICAL DISINFECTION › Section 217.281 - Application of Chlorination and Dechlorination Chemicals

Current through Reg. 49, No. 28; July 12, 2024
(a) Mixing Requirements.
(1) Mixing Zones. A mixing zone within a
				  chlorine contact basin must not be considered as part of the volume needed for
				  disinfection. A mixing zone must be designed to ensure that the chlorine is
				  thoroughly mixed with the wastewater before entering a chlorine contact
				  chamber, as described in paragraph (2) of this subsection.
(2) Chlorine and Sodium Hypochlorite
				  Application. A disinfection system must apply the chlorine gas or solution in a
				  highly turbulent flow regime created by in-line diffusers, mechanical mixers,
				  or jet mixers. Effective initial mixing for the mean velocity gradient (G
				  value) in the area of turbulent flow must exceed 500 per second. A serpentine
				  disinfection channel may be used in place of turbulent initial mixing if the
				  length-to-width ratio is at least 40-to-1 and complete mixing is demonstrated
				  by a dye test.
(3) Sulfur Dioxide
				  and Sodium Bisulfite Application.
(A) The
				  mixing for a sulfur dioxide or sodium bisulfite system must ensure compliance
				  with the effluent limits in the wastewater permit.
(B) A disinfection system must provide a mean
				  velocity gradient (G value) of at least 250 per second.
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter K - CHEMICAL DISINFECTION › Section 217.282 - Other Chemical Disinfection and Dechlorination Processes

Current through Reg. 49, No. 28; July 12, 2024
(a) Any chemical
				  disinfection or dechlorination process not discussed in this subchapter, such
				  as chlorine dioxide, ozone, tablet or powder disinfection and dechlorination
				  processes, and liquid solution disinfection and dechlorination processes are
				  subject to the requirements of §
										217.7(b)(2)
				  of this title (relating to Types of Plans and Specifications
				  Approvals).
(b) Chemical
				  disinfection processes not discussed in this subchapter must be flow-paced and
				  must use chemicals approved by the manufacturer for the purpose of wastewater
				  disinfection.
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter K - CHEMICAL DISINFECTION › Section 217.283 - Post-Disinfection Requirements

Current through Reg. 49, No. 28; July 12, 2024
(a) Sampling
				  points must be identified in the engineering report. A design must include a
				  sufficient number of sampling points to:
(1)
				  allow an operator to monitor the disinfection system for process control;
				  and
(2) allow monitoring of
				  permitted effluent limits.
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter L - ULTRAVIOLET LIGHT DISINFECTION › Section 217.291 - Ultraviolet Light Disinfection System Definitions

Current through Reg. 49, No. 28; July 12, 2024
(a) Module--A grouping of ultraviolet lamps
				  electrically and physically connected to each other.
(b) Bank--A grouping of modules that:
(1) can be automatically turned on and off in
				  relation to effluent flow variations;
(2) is electrically or physically connected
				  together or physically adjacent to each other; and
(3) forms a complete unit capable of treating
				  the full design width and depth of the disinfection channel.
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter L - ULTRAVIOLET LIGHT DISINFECTION › Section 217.292 - Ultraviolet Light Disinfection Systems Effluent Limitations

Current through Reg. 49, No. 28; July 12, 2024
Ultraviolet light disinfection systems must disinfect the
					 effluent to the bacteria limits in the wastewater treatment facility's
					 wastewater permit.
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter L - ULTRAVIOLET LIGHT DISINFECTION › Section 217.293 - Ultraviolet Light Disinfection Systems Redundancy Requirements

Current through Reg. 49, No. 28; July 12, 2024
(a) An ultraviolet
				  (UV) disinfection system must include at least two banks positioned in series
				  in a disinfection channel.
(b) A UV
				  light disinfection system must meet the dosage requirements determined in
				  §
										217.295
				  of this title (relating to Ultraviolet Light Disinfection Dosage and System
				  Sizing) under all conditions.
(c)
				  An owner must maintain an inventory of replacement equipment, including lamps,
				  ballasts, quartz sleeves, banks, and modules, to replace equipment during
				  emergency repairs and scheduled maintenance. The minimum inventory of
				  replacement lamps, ballasts, and quartz sleeves is described in §
										217.298(b)
				  of this title (relating to Ultraviolet Light Disinfection System Cleaning and
				  Maintenance).
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter L - ULTRAVIOLET LIGHT DISINFECTION › Section 217.294 - Ultraviolet Light Disinfection Systems Monitoring and Alarms

Current through Reg. 49, No. 28; July 12, 2024
(a) An ultraviolet
				  (UV) system shall continuously monitor and display the following information on
				  the system control panel :
(1) the flow rate
				  in each disinfection channel;
(2)
				  the relative intensity of the lamps in one bank of a disinfection
				  channel;
(3) the operational status
				  and condition of each bank;
(4) the
				  on or off status of each lamp in the system;
(5) the number of operating hours of the
				  lamps in each bank in the system;
(6) the total number of hours of operation
				  for each bank in the system; and
(7) the transmissivity of UV light in the
				  disinfection channel.
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter L - ULTRAVIOLET LIGHT DISINFECTION › Section 217.295 - Ultraviolet Light Disinfection Dosage and System Sizing

Current through Reg. 49, No. 28; July 12, 2024
(a) An ultraviolet light (UV) system must be
				  sized based upon the results of an independent bioassay that meets the
				  following minimum criteria.
(1) The lamp and
				  ballast in a bioassay test system must have the same spectral characteristics
				  and 254 nanometers (nm) wavelength output as the full-scale system.
(2) Spacing of the lamps in a bioassay test
				  unit must be the same as in the full-scale system.
(3) The arrangement of the lamps must mirror
				  the full-scale system.
(4) The
				  maximum scale-up factor is 10.
(5)
				  Scale down is prohibited.
(6) The
				  minimum number of lamps in a bioassay is four lamps per reactor.
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter L - ULTRAVIOLET LIGHT DISINFECTION › Section 217.296 - Ultraviolet Light Disinfection Bioassay Test Procedure

Current through Reg. 49, No. 28; July 12, 2024
(a) A bioassay procedure must conform to one
				  of the following protocols:
(1) National
				  Water Research Institute's
Ultraviolet Disinfection Guidelines for
				  Drinking Water and Water Reuse
(3rd edition, 2012); or
(2) NSF International, The Public Health and
				  Safety Company, 40 CFR §35.6450
Environmental Technology
				  Verification Protocol
(October 2002).
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter L - ULTRAVIOLET LIGHT DISINFECTION › Section 217.297 - Ultraviolet Light Disinfection Reactor Design

Current through Reg. 49, No. 28; July 12, 2024
(a) An approach channel must be unobstructed
				  and have a minimum length of 4.0 feet before the first ultraviolet (UV)
				  bank.
(b) The downstream channel
				  length must be unobstructed for a minimum length of 4.0 feet following the last
				  bank of UV lamps and before a fluid-level control device.
(c) Inlet channels must provide equal flow
				  distribution across all UV channels.
(d) A downstream discharge point of a UV
				  system must include a level control that ensures that the UV lamps remain
				  submerged, according to the manufacturer's recommendations, regardless of
				  flow.
(e) The UV system must
				  prevent an individual's exposure to UV light from the UV system, including
				  upstream and downstream portions of a UV channel.
(f) An enclosed UV system must have a
				  dehumidifier or must be designed to prevent corrosion of electrical
				  components.
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter L - ULTRAVIOLET LIGHT DISINFECTION › Section 217.298 - Ultraviolet Light Disinfection System Cleaning and Maintenance

Current through Reg. 49, No. 28; July 12, 2024
(a) An ultraviolet
				  (UV) disinfection system must include provisions for draining each UV
				  disinfection channel to another treatment unit within the wastewater treatment
				  facility and for routine cleaning of the UV lamps and modules.
(b) A UV system must include the following
				  replacement parts, as a percentage of the total system, equal to at least:
(1) 5% of the lamps;
(2) 2% of the ballasts; and
(3) 5% of the quartz sleeves.
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter L - ULTRAVIOLET LIGHT DISINFECTION › Section 217.299 - Ultraviolet Light Disinfection System Safety

Current through Reg. 49, No. 28; July 12, 2024
Signs must be posted in an ultraviolet (UV) reactor area
					 with "WEAR UV-RATED EYE PROTECTION" and "DO NOT LOOK AT UV LAMPS" in English
					 and Spanish. Anyone in a reactor area must wear appropriate personal
					 protection, including a UV-rated face shield and safety glasses or
					 goggles.
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter L - ULTRAVIOLET LIGHT DISINFECTION › Section 217.300 - Post-Disinfection Requirements

Current through Reg. 49, No. 28; July 12, 2024
(a) Sample
				  points. Sampling points must be identified in the engineering report. A design
				  must include a sufficient number of sampling points to:
(1) allow an operator to monitor the
				  disinfection system for process control; and
(2) allow monitoring of permitted effluent
				  limits.
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter M - SAFETY › Section 217.321 - Safety Design of a Wastewater Treatment Facility

Current through Reg. 49, No. 28; July 12, 2024
(a) The safety aspects of a wastewater
				  treatment facility design must be based on
Design of Municipal
				  Treatment Plants,
WEF Manual of Practice No. 8, 5th edition, 2009,
				  published by the Water Environment Federation. Other safety design guidelines
				  may be used only if submitted in the design submittal and approved in writing
				  by the executive director.
(b)
				  Occupational safety and health hazards, and risks to workers and the public,
				  must be addressed in the design of collection system and wastewater treatment
				  facility equipment and processes.
(c) The design of a wastewater treatment
				  facility must incorporate processes that use the least hazardous and least
				  toxic chemicals and the smallest amounts of those chemicals that will
				  effectively treat and disinfect the influent so that the effluent and sludge
				  meet the requirements in the associated wastewater permit, and do not degrade
				  the water quality in a receiving stream or cause accumulation of hazardous or
				  toxic chemicals in a land application area.
(d) Where applicable, a design must follow
				  the guidelines pursuant to 29 Code of Federal Regulations, Part 1910.
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter M - SAFETY › Section 217.322 - Safety and Security Audits

Current through Reg. 49, No. 28; July 12, 2024
(a)
				  Safety Audit.
(1) The owner of a wastewater
				  treatment facility must conduct an annual safety audit of the wastewater
				  treatment facility and collection system that evaluates injuries and incidents
				  during the prior year in order to determine the locations, causes, types of
				  injuries, and jobs being performed when the injuries or incidents occurred.
(A) For the purposes of this subchapter, an
				  injury is harm or damage to an individual that results in any of the following:
				  death, time away from work, restricted work or transfer to another job, medical
				  treatment beyond first aid, or loss of consciousness.
(B) For the purposes of this subchapter, an
				  incident is harm or damage to an individual that results in first
				  aid.
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter M - SAFETY › Section 217.323 - Hazardous Operation and Maintenance

Current through Reg. 49, No. 28; July 12, 2024
(a) An owner shall perform a job safety
				  analysis to identify potentially hazardous situations for a new or altered
				  wastewater treatment unit or collection system unit before construction
				  begins.
(b) For those identified
				  potentially hazardous tasks, a list must be prepared for each task that
				  identifies the necessary:
(1) tools,
				  equipment, and supplies;
(2) fixed
				  and portable lifting equipment;
(3)
				  fixed and portable monitoring equipment;
(4) personal protective equipment and
				  clothing;
(5) warning signs and
				  guards; and
(6) first-aid
				  supplies.
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter M - SAFETY › Section 217.324 - Chemical Handling

Current through Reg. 49, No. 28; July 12, 2024
(a) An owner must
				  make available personal protective equipment for breathing, eyes, face, head,
				  and extremities, as well as all other equipment recommended by the Safety Data
				  Sheet, for all individuals that will handle any chemical known to pose a
				  potential health risk. The owner must train the wastewater treatment facility
				  staff in the use of the equipment.
(b) A wastewater treatment facility that uses
				  any chemical must be designed to provide eye washing and showering systems
				  within each chemical work area for immediate emergency use. The specifications
				  must reference a recognized national reference standard, such as American
				  National Standards Institute Z358.1, for placement and installation of eye wash
				  stations and showers.
(c) All
				  personal protective equipment and chemical neutralizers must be immediately
				  accessible outside a chemical storage area.
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter M - SAFETY › Section 217.325 - Railings, Ladders, Walkways, and Stairways

Current through Reg. 49, No. 28; July 12, 2024
(a) A guard rail with an opening that is
				  designed to provide access must have a removable chain across the opening when
				  the opening is not in use.
(b) An
				  open valve box, pit, tank, or basin with walls that extend less than 4.0 feet
				  above ground must have a railing that extends from the top of the walls to at
				  least 4.0 feet above ground level. The railing must be capable of preventing an
				  individual from falling into the open valve box, pit, tank, or basin.
(c) Equipment and work areas that are more
				  than 4.0 feet above or below ground level must be designed with a permanent
				  stairway for access unless the work area is a manhole or a similar confined
				  space.
(d) A ladder must have flat
				  safety tread rungs and must extend at least 3.5 feet out of a vault.
(e) A walkway above an open tank must have a
				  toe board at least four inches tall that is designed to prevent a person from
				  slipping off the walkway. Owners and engineers should refer to 29 Code of
				  Federal Regulations, Part 1910, Subpart D, for additional guidance on walking
				  and working surfaces.
(f) Walkways,
				  steps, landings, and ladder rungs must have a non-slip finish. The vertical
				  rise between adjacent steps on a stairway must not exceed 9.5 inches. Stairways
				  must be designed with no horizontal gap between the tread run of adjacent
				  steps.
(g) An overhead pipe or
				  other overhead obstruction must have at least a 7.0-foot clearance, unless the
				  pipe or obstruction is padded to prevent head injury and has a warning
				  sign.
(h) Basins with vertical
				  walls terminating more than 4.0 feet above or below ground level must be
				  designed with a stairway for access.
(i) Guard rails on walkways shall have
				  adequate clearance space for maintenance operations.
(j) Clarifiers must have grating across the
				  discharge pipe in the launder or stop bars across the launder before the
				  discharge pipe to prevent an individual from entering the discharge pipe from
				  the clarifier.
(k) All guard rails,
				  railings, ladders, walkways, and associated appurtenances must be designed and
				  constructed to ensure the safety of individuals at the wastewater treatment
				  facility.
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter M - SAFETY › Section 217.326 - Electrical and Fire Code Compliance

Current through Reg. 49, No. 28; July 12, 2024
(a)
				  The electrical elements of a wastewater treatment facility and collection
				  system must conform to local electrical codes. If the wastewater treatment
				  facility or collection system is located in an area that does not have a local
				  electrical code, the electrical elements must comply with the most recent
				  edition of the National Fire Protection Association 70 National Electrical
				  Code® at the time of installation.
(b) The wastewater treatment facility and
				  collection system must conform to local fire codes. If the wastewater treatment
				  facility is located in an area that does not have a local fire code, the
				  wastewater treatment facility and collection system must comply with the most
				  recent edition of National Fire Protection Association 1 Fire Code® at the
				  time of installation.
(c)
				  Electrical elements must be protected from environmental hazards with a
				  housing. Environmental hazards include moisture, extreme temperatures, and
				  pests.
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter M - SAFETY › Section 217.327 - Non-Potable Water

Current through Reg. 49, No. 28; July 12, 2024
Each hydrant and outlet for non-potable water must have
					 signs in both English and Spanish reading "NON-POTABLE WATER, DO NOT DRINK" and
					 "NO BEBA EL AGUA."
Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS › Subchapter M - SAFETY › Section 217.328 - Wastewater Treatment Facility Access Control

Current through Reg. 49, No. 28; July 12, 2024
(a) A wastewater treatment facility must be
				  completely enclosed by an intruder-resistant fence.
(1) The intruder resistant fence must have a
				  locked gate at each access point.
(2) The intruder-resistant fence must be at
				  least 6.0 feet tall, and the bottom of the fence must be close enough to
				  surface grade to prevent human access.
(3) The intruder-resistant fence must be
				  constructed of wood, concrete, masonry, or metal. Other materials may be used,
				  but only if approved in writing by the executive director.
(4) The top of the intruder-resistant fence
				  must have at least three strands of barbed wire. A fence that is at least 8.0
				  feet tall does not require barbed wire. The top of an intruder-resistant fence
				  may have outwardly-directed iron bars spaced on four-inch centers instead of
				  barbed wire.
(5) A five-strand
				  barbed wire fence may be used in a rural area for fencing lagoons or
				  overland-flow plots, but only if approved in writing by the executive
				  director.