reglab/statecodes huggingface dataset:
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 656 - Water Pollution Control Facility Construction Standards › Subchapter 16 - Biological Treatment Standards › Section 252:656-16-2 - Attached growth systems

Current through Vol. 41, No. 20, July 1, 2024
(a)
Rotating biological contactors (RBC).
An RBC can only be installed
				to replace or to add to an existing RBC.
(1)
Winter protection.
Enclose RBC units in a corrosion resistant
				structure to protect biological growth from cold temperatures and excessive
				heat loss.
(2)
Pretreatment.
Provide primary clarifiers with scum and grease
				collecting devices. Bar screening and/or comminution alone are not suitable
				pretreatment.
(3)
Staging.
Provide at least four stages for secondary treatment
				applications, with more stages for greater nitrification and BOD
				removal.
(4)
Loading.
(A)
Hydraulic.
Equalize flow
				where the ratio of peak flow to average flow is 2.5 or greater. For secondary
				treatment hydraulic loading shall be from 2 to 4
				gpd/ft2 and shall not exceed 0.75 to 2.0
				gpd/ft2 where nitrification is required.
(B)
Organic.
First stage loading
				rates shall be from 2.5 to 4.0 lbs. of soluble BOD/day/1,000
				ft2. 3.0 lbs. is recommended.
(5)
Tanks.
Provide at least 0.12
				gal/ft2 of media for RBC tanks to maintain a
				hydraulic load of 2 gpd/ft2. Provide a side water
				depth of 5 feet or submerge the media at least 40%.
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 656 - Water Pollution Control Facility Construction Standards › Subchapter 16 - Biological Treatment Standards › Section 252:656-16-3 - Biological nutrient removal

Current through Vol. 41, No. 20, July 1, 2024
(a)
Purpose.
Processes for nutrient removal in wastewater include
				conversion of ammonia and organic nitrogen to nitrate nitrogen (nitrification),
				the conversion of nitrate nitrogen to nitrogen gas (denitrification) and
				removal of phosphorus.
(b)
Single stage (combined carbonaceous BOD removal and
				nitrification).
Design processes according to the requirements of
				252:656 and submit all design calculations. The following factors will have a
				significant impact on the nitrification process: ammonia and nitrite
				concentrations, BOD/TKN ratio, dissolved oxygen concentration, temperature,
				alkalinity and pH. The following steps shall be considered in the design of the
				suspended growth reactor and the resulting calculations submitted to DEQ for
				review. If actual kinetic coefficients cannot be obtained, textbook values may
				be used for design.
(1) Select an appropriate
				safety factor to handle peak, diurnal and transient loadings (a minimum safety
				factor of 2.0 applied to design mean cell residence time is
				required).
(2) Select the mixed
				liquor dissolved oxygen (DO) concentration. The minimum acceptable level is 2.0
				mg/l. Determine the amount of oxygen required to satisfy the nitrogenous oxygen
				demand. Provide a minimum of 4.6 mg O2/mg N oxidized.
(3) Evaluate the requirement for pH control.
				Every mg/l of ammonium-nitrogen (NH4-N) oxidized will result in the destruction
				of 7.14 mg/l alkalinity.
(4)
				Estimate the maximum growth rate of nitrifying bacteria under the most adverse
				DO, pH and temperature conditions.
(5) Determine the design mean cell residence
				time with the safety factor (10-day is recommended).
(6) Predict the effluent nitrogen
				concentration.
(7) Determine the
				hydraulic retention time to achieve the necessary nitrogen concentration. A
				10-hour retention time is needed to compensate for lower nitrification rates
				when wastewater temperatures are below 50 degrees F.
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 656 - Water Pollution Control Facility Construction Standards › Subchapter 17 - Clarifier Standards › Section 252:656-17-1 - General considerations [REVOKED]

Current through Vol. 41, No. 20, July 1, 2024
Added at 17 Ok Reg 1140,
				  eff 6-1-00; Revoked at 23 Ok Reg 937, eff
				  6-15-06
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 656 - Water Pollution Control Facility Construction Standards › Subchapter 17 - Clarifier Standards › Section 252:656-17-3 - Sludge and scum removal

Current through Vol. 41, No. 20, July 1, 2024
(a)
Scum removal.
Provide scum collection and removal facilities,
				including baffling, for all settling tanks.
(b)
Sludge removal.
Design
				collection and withdrawal facilities for rapid sludge removal.
(1)
Sludge hopper.
The minimum
				slope of the sidewalls of sludge hoppers shall be 1.7 vertical to 1.0
				horizontal. Hopper floors shall not be larger than 2 feet in diameter if round,
				or 2 feet on any side if square. Hopper wall surfaces shall be made smooth with
				rounded corners to aid in sludge removal.
(2)
Sludge removal piping.
Each
				hopper shall have an individually-valved sludge withdrawal line at least 6
				inches in diameter for gravity withdrawal or pump suction. Design sludge
				withdrawal to maintain a 3 fps velocity in the withdrawal pipe. Provide for
				rodding or back-flushing individual pipe runs.
(3)
Sludge removal control.
Provide equipment to view, sample and control the rate of sludge withdrawal.
				Provide a means of measuring the sludge removal rate. Air lift type of sludge
				removal will not be approved for removal of primary sludges. Include time
				clocks and valve activators to regulate the duration and sequencing of sludge
				removal for sludge pump motor control systems.
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 656 - Water Pollution Control Facility Construction Standards › Subchapter 19 - Sludge Facility Standards › Section 252:656-19-1 - Design considerations

Current through Vol. 41, No. 20, July 1, 2024
This Subchapter establishes design criteria for converting
				  sludge from municipal wastewater treatment processes to biosolids that will
				  meet at least one of the processes to significantly reduce pathogens ("PSRPs")
				  (Class B) of the State and Federal requirements for land application and
				  landfilling. Sludge may ultimately be beneficially reused or disposed in a
				  landfill. All methods of off-site and on-site sludge reuse and disposal are
				  subject to 40 CFR Part 503 as adopted by reference in OAC 252:606, and to OAC
				  252:521 if landfilled. Processes to further reduce pathogens ("PFRPs") (Class
				  A) may be proposed and will be evaluated and approved using a composting
				  procedure pursuant to the requirements of OAC 252:606. Any other process from
				  converting municipal sludge to biosolids will be reviewed and may be approved
				  by the DEQ on a case by case basis. A sludge management plan shall be approved
				  by the DEQ before any construction permit for a new or upgraded wastewater
				  treatment facility can be issued. On-site sludge dewatering facilities shall be
				  provided for all plants although the following requirements may be reduced with
				  on-site liquid sludge storage facilities or approved off-site sludge disposal.
				  For calculating design sludge handling and disposal needs for sludge
				  stabilization processes, a rational basis of design for sludge production
				  values shall be developed and provided to the reviewing authority for approval
				  on a case-by-case basis.
Added at 17 Ok Reg 1140,
				  eff 6-1-00; Amended at 23 Ok Reg 937, eff 6-15-06; Added at 28 Ok Reg 1282, eff
				  7-1-11
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 656 - Water Pollution Control Facility Construction Standards › Subchapter 19 - Sludge Facility Standards › Section 252:656-19-1.1 - Process Selection

Current through Vol. 41, No. 20, July 1, 2024
Equivalency processes will be approved on a case by case
				  basis. A pilot study may be required.
Added at 23 Ok Reg 937,
				  eff 6-15-06
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 656 - Water Pollution Control Facility Construction Standards › Subchapter 19 - Sludge Facility Standards › Section 252:656-19-2 - Anaerobic sludge digestion

Current through Vol. 41, No. 20, July 1, 2024
(a)
Tanks.
(1)
Multiple
				units.
Provide dual units or alternate methods of sludge processing or
				emergency storage to maintain continuity of service.
(2)
Depth.
Provide a sidewater
				depth of at least 20 feet.
(3)
Slope.
Slope the tank bottoms towards withdrawal piping. The
				bottom slope must be at least 1:12 for mechanical removal, or 1:4 for gravity
				removal.
(4)
Manholes.
Provide at least two 36-inch diameter manholes in the top of the digester in
				addition to the gas dome. At least one opening must be large enough for
				equipment to remove grit and sand. Provide stairways to reach the access
				manholes.
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 656 - Water Pollution Control Facility Construction Standards › Subchapter 19 - Sludge Facility Standards › Section 252:656-19-3 - Aerobic sludge digestion

Current through Vol. 41, No. 20, July 1, 2024
(a)
General.
Aerobic digestion can be used to stabilize primary
				sludge, secondary sludge or a combination of the two. Multiple units are
				required at treatment facilities with a capacity of 1,000 PE or more. Treatment
				plants, designed for less than 1,000 PE, may use a single unit if adequate
				provisions are made for sludge handling and redundency.
(b)
Mixing and air requirements.
Provide sufficient air to keep the solids in suspension and maintain dissolved
				oxygen between 1 and 2 mg/l. A minimum mixing and air requirement of 30
				ft3/min/1,000 ft3 tank
				volume shall be maintained with the largest blower out of service.
(c)
Tank capacity.
Determine
				total tank(s) capacity by rational calculations based on such factors as volume
				of sludge added, sludge characteristics, time of aeration, sludge temperature
				and ultimate disposal methods. Submit all calculations and design assumptions
				for review.
(d)
Volatile
				solids loading.
Volatile suspended solids loading must not exceed 100
				lb/1,000 ft3 tank volume per day.
(e)
Time and temperature.
Install a temperature probe and recording device to continuously record
				digester temperature.
(f)
Supernatant separation.
Provide for separation and withdrawal of
				supernatant and for collection and removal of scum and grease.
(1)
Supernatant withdrawal.
Design for supernatant withdrawal at least 6 inches below the liquid surface
				level after a minimum one-hour settling period. Return supernatant to the head
				of the plant.
(2)
Sampling
				facilities.
Provide a sampling line (at least 1.5 inches in diameter)
				with a quick-closing valve no more than 1 foot from the tank bottom.
(3)
Maintenance provisions.
Slope the tank bottoms toward the sludge withdrawal pipe. Minimum slope to be
				at least 1 foot vertical to 4 feet horizontal.
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 656 - Water Pollution Control Facility Construction Standards › Subchapter 19 - Sludge Facility Standards › Section 252:656-19-4 - Sludge pumps and piping

Current through Vol. 41, No. 20, July 1, 2024
(a)
Sludge pumps.
(1)
Duplicate units.
Provide duplicate units.
(2)
Minimum head.
Pumps must
				provide at least 24 inches of positive head.
(3)
Sampling facilities.
Provide
				a means to sample sludge. All sampling pipes and valves must be at least 1.5
				inches.
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 656 - Water Pollution Control Facility Construction Standards › Subchapter 19 - Sludge Facility Standards › Section 252:656-19-5 - Sludge dewatering

Current through Vol. 41, No. 20, July 1, 2024
An on-site sludge dewatering facility shall be provided at
				  all plants and, at a minimum, shall provide the following:
(1)
Sludge drying beds.
(A)
Area.
Provide all design
				analyses for dewatering systems. Where drying is the selected method for
				production of a PSRP sludge, provide at least 3 months holding time, 2 months
				of which the holding temperature must average above 0 deg. C. A temperature
				recording device must be installed to continuously record the ambient
				temperature at the plant site.
(B)
Media-percolation type.
(i)
Gravel.
Provide at least 12 inches of coarse gravel around the
				underdrains. Place the gravel in layers and extend at least 6 inches above the
				top of the underdrains. The top layer must consist of at least 3 inches of
				gravel from 1/8 to 1/4-inch in size.
(ii)
Sand.
The top course shall
				consist of at least 9 inches of clean coarse sand. The sand shall have an
				effective size of 0.3 to 1.2 and a uniformity coefficient of less than
				5.0.
(iii)
Underdrains.
Perforated PVC sewer pipe at least 6 inches in
				diameter spaced not more than 10 feet apart on center must be used.
(C)
Partially paved
				type.
Provide for the removal of dried sludge with mechanical
				equipment.
(D)
Walls.
Walls shall be watertight and extend 15 to 18 inches above and at least 6
				inches below the sand surface. Outer walls shall extend at least 6 inches above
				the surrounding ground elevation.
(E)
Sludge removal.
A minimum of
				two beds must be provided in all cases. Provide concrete truck tracks for all
				percolation-type sludge beds. Pairs of tracks for the percolations-type beds
				shall be on 20-foot centers.
(F)
Sludge influent.
Sludge piping must terminate at least 12 inches
				above the sand surface and be sloped for drainage. Provide a concrete splash
				pad at sludge discharge points. Piping must allow control flexibility to
				discharge sludge to any drying bed.
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 656 - Water Pollution Control Facility Construction Standards › Subchapter 19 - Sludge Facility Standards › Section 252:656-19-5.1 - Lime stabilization

Current through Vol. 41, No. 20, July 1, 2024
Alkaline material may be added to liquid primary or secondary
				  sludges for: sludge stabilization in lieu of digestion facilities; to
				  supplement existing digestion facilities; or for interim sludge handling. The
				  design of the lime stabilization system shall account for the increased sludge
				  quantities for storage, handling, transportation, and disposal methods and
				  associated costs.
(1)
Operational criteria.
Sufficient alkaline material shall be added
				to liquid sludge in order to maintain a homogeneous mixture with a minimum pH
				of 12 after 2 hours of vigorous mixing. Facilities for adding supplemental
				alkaline material shall be provided to maintain the pH of the sludge during
				interim sludge storage periods.
(2)
Odor control and ventilation.
Odor control facilities shall be
				provided for sludge mixing and treated sludge storage tanks. Ventilation is
				required for indoor sludge mixing, storage and processing facilities. Provide
				12 complete air changes per hour.
(3)
Tanks.
Mixing tanks shall be
				designed to operate as either a batch or continuous flow process. The following
				items shall be addressed in determining the number and size of tanks:
(A) peak sludge flow rates;
(B) storage between batches;
(C) dewatering or thickening performed in
				tanks;
(D) repeating sludge
				treatment due to pH decay of stored sludge;
(E) sludge thickening prior to sludge
				treatment; and
(F) type of mixing
				device used and associated maintenance or repair requirements.
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 656 - Water Pollution Control Facility Construction Standards › Subchapter 19 - Sludge Facility Standards › Section 252:656-19-6 - Stabilized sludge holding facilities

Current through Vol. 41, No. 20, July 1, 2024
For systems that land apply biosolids, design on-site
				  temporary sludge storage facilities to hold the sludge volume produced during a
				  three-month period. Biosolids shall not be stored for greater than six (6)
				  months without prior written approval from the DEQ and in no case longer than
				  one (1) year. For dewatered sludge, provide concrete or equivalent surfaced
				  facilities with appropriate drainage systems to store treated sludge. Drainage
				  systems must return supernatant or other liquids to the headworks of the
				  treatment system. Sludge storage must accommodate daily sludge production
				  volumes and function as an operational buffer for unit outage and adverse
				  weather conditions. Designs utilizing increased sludge age in the activated
				  sludge system as a means of storage are not acceptable. On-site storage of
				  dewatered high pH stabilized sludge shall be limited to 30 days. Provisions for
				  rapid retreatment or disposal of dewatered sludge stored on-site shall also be
				  made in case of sludge pH decay.
Added at 17 Ok Reg 1140,
				  eff 6-1-00; Amended at 23 Ok Reg 937, eff 6-15-06; Added at 28 Ok Reg 1282, eff
				  7-1-11
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 656 - Water Pollution Control Facility Construction Standards › Subchapter 21 - Disinfection Standards › Section 252:656-21-1 - General disinfection criteria

Current through Vol. 41, No. 20, July 1, 2024
(a)
Applicability.
The requirements in this section apply to all
				disinfection systems.
(b)
Design considerations.
A disinfection system used to comply with
				the disinfection requirements:
(1) in an
				OPDES permit shall be designed, constructed and operated to meet bacteria
				limits in the Water Quality Standards and the OPDES permit.
(2) for a reclaimed water system shall be
				designed, constructed and operated to meet the bacteria limits in the water
				reuse permit and Appendix A of OAC 252:627.
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 656 - Water Pollution Control Facility Construction Standards › Subchapter 21 - Disinfection Standards › Section 252:656-21-2 - Chlorine disinfection systems

Current through Vol. 41, No. 20, July 1, 2024
(a)
Equipment capacity.
The following requirements are for the
				chlorination of non-industrial wastewater. The equipment shall be capable of
				supplying the following dosage as applicable:
(1) Trickling filter plant effluent - 10
				mg/l;
(2) Activated sludge plant
				effluent - 8 mg/l;
(3) Tertiary
				filtration effluent - 6 mg/l;
(4)
				Nitrified effluent - 6 mg/l; and
(5) Category 2 water reuse chlorination
				systems - 12 mg/l or a dose sufficient to achieve high level disinfection for
				water reuse requirements.
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 656 - Water Pollution Control Facility Construction Standards › Subchapter 21 - Disinfection Standards › Section 252:656-21-3 - Ultraviolet radiation disinfection systems (UV systems)

Current through Vol. 41, No. 20, July 1, 2024
(a)
Use of UV for disinfection.
Ultraviolet radiation disinfection systems ("UV systems") shall only be used to
				disinfect high quality effluent having :
(1)
				at least 65% ultraviolet radiation transmittance at 254 nanometers wave length;
				and
(2) BOD and suspended solids
				concentrations no greater than 30 mg/l at any time.
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 656 - Water Pollution Control Facility Construction Standards › Subchapter 21 - Disinfection Standards › Section 252:656-21-4 - Ozone disinfection

Current through Vol. 41, No. 20, July 1, 2024
Use of Ozone for disinfection.
Requests for use
				  of ozone disinfection shall be reviewed and approved on a case-by-case basis.
				  All ozone systems shall meet the requirements established in OAC
				  252:626-9-4 including
				  the following:
(1) Disinfection by
				ozone shall meet requirements pursuant to OAC
				252:656-27-3(b)(3).
(2) Disinfection by ozone shall meet
				inactivation of microorganisms as required in OAC
				252:656-27-3(a)(6).
(3) Design shall identify the total CT
				requirement and evaluate ozone dose, potential ozone demand, plug flow contact
				time, and whether microflocculation of solids could cause compliance problems
				with other permit limits, such as effluent, TSS, and turbidity. These factors
				shall be determined based on one of the following:
(A) pilot studies
(B) a minimum of three (3) well documented
				analogous projects.
(C) CT
				calculations, EPA LTIESWTR Disinfection Profiling and Benchmarking Technical
				Guidance Manual, EPA 816-R-03-004, May 2003.
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 656 - Water Pollution Control Facility Construction Standards › Subchapter 23 - Supplemental Treatment Standards › Section 252:656-23-1 - Effluent filtration

Current through Vol. 41, No. 20, July 1, 2024
(a)
Design
				flow rate.
A wastewater treatment system:
(1) required to have filtration to maintain
				OPDES permit compliance shall be sized using the design peak hourly flow;
				and
(2) that produces Category 2
				reclaimed water shall be sized using the anticipated design flow.
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 656 - Water Pollution Control Facility Construction Standards › Subchapter 23 - Supplemental Treatment Standards › Section 252:656-23-2 - Disc filters [REVOKED]

Current through Vol. 41, No. 20, July 1, 2024
Added at 17 Ok Reg 1140,
				  eff 6-1-00; Amended at 23 Ok Reg 937, eff 6-15-06; Added at 28 Ok Reg 1282, eff
				  7-1-11
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 656 - Water Pollution Control Facility Construction Standards › Subchapter 23 - Supplemental Treatment Standards › Section 252:656-23-3 - Post-aeration

Current through Vol. 41, No. 20, July 1, 2024
(a)
Cascade aeration.
Cascade
				aeration may be used where site topography permits. Head requirements will vary
				from three to ten feet, depending on the initial DO, temperature of the
				wastewater and the required DO level before discharge. The formulas used to
				determine the required cascade height are listed in Appendix C.
(b)
Mechanical aeration.
Provide
				design calculations to meet Water Quality Standards effluent
				requirements.
(c)
Diffused-air aeration.
Provide design calculations to meet Water
				Quality Standards effluent requirements.
Added at 17 Ok Reg 1140,
				  eff 6-1-00; Amended at 23 Ok Reg 937, eff 6-15-06; Added at 28 Ok Reg 1282, eff
				  7-1-11
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 656 - Water Pollution Control Facility Construction Standards › Subchapter 23 - Supplemental Treatment Standards › Section 252:656-23-4 - Membrane filtration

Current through Vol. 41, No. 20, July 1, 2024
Requests to use membrane filtration shall be reviewed and
				  approved on a case-by-case basis. All membrane filtration systems shall meet
				  the construction standards outlined in OAC
				  252:626-9-9(f)
				  with the following exceptions:
(1)
Source water testing [Exception to OAC
				252:626-9-9(f)(1)
				].
For wastewater and reuse applications, source water shall be defined
				as the effluent from a suitable treatment process designed according to the
				construction standards outlined in this chapter. This water shall be tested for
				all parameters that may affect membrane filtration and reuse water quality.
				Historic information shall be reviewed to determine water quality extremes that
				may be expected. Tabulated results of tests performed, summaries, and
				conclusions shall be submitted as part of the engineering report proposing
				membrane filtration.
(2)
Pilot plant verification study [Exception to OAC
				252:626-9-9(f)(2)
				].
Prior to initiating the design of a membrane filtration system for
				wastewater or reuse applications, a pilot plant study is required to determine
				the best membrane to use. Submit pilot study protocol to DEQ for approval prior
				to initiating any pilot study. Pilot study duration shall be a minimum of three
				(3) months unless low variability in parameters critical to design warrant a
				shorter duration.
(3)
Log
				removal [Exception to OAC
				252:626-9-9(f)(3)
				].
A pilot verification study shall be required for a membrane
				filtration system for wastewater or reuse applications only when removal credit
				is requested pursuant to OAC
				252:656-27-3(a)(6).
(4)
Pretreatment [Exception to OAC
				252:626-9-9(f)(5)
				].
Membrane filtration systems for wastewater and reuse applications
				shall be preceded by suitable biological treatment, disinfection to prevent
				biological growth and, if necessary, clarification processes designed according
				to the construction standards outlined in OAC 252:656-16 and OAC 252
				656-17.
(5)
Turbidity
				monitoring [Exception to OAC
				252:626-9-9(f)(10)
				].
Turbidity monitoring equipment shall be installed on all influent and
				effluent piping of membrane units. Continuous turbidity recording equipment
				shall be provided on the effluent piping and connected to an alarm system to
				warn operators of an excessive turbidity breakthrough for reuse
				applications.
(6)
Disinfection [Exception to OAC
				252:626-9-9(f)(17)
				].
Membrane filtration systems shall be properly disinfected each time
				the membrane units are opened for maintenance and water shall not be sent into
				the reuse distribution system. Disinfectants prohibited by the membrane
				manufacturer shall not be used through the membranes.
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 656 - Water Pollution Control Facility Construction Standards › Subchapter 25 - Wastewater Land Application Systems › Section 252:656-25-1 - The slow rate land application process

Current through Vol. 41, No. 20, July 1, 2024
Slow rate land application is the controlled application of
				  wastewater to the surface of land to achieve a designed degree of treatment
				  through natural, chemical and biological processes that occur on and in the
				  soil. In Oklahoma, slow rate land application systems are acceptable for
				  meeting the agronomic water needs of pasture land, hay meadows and for crop
				  production where the crops will not be eaten raw. See Appendix D for the
				  loading rate, field area and storage volume equations. Refer to OAC 252:627 for
				  permit and operations criteria.
Added at 17 Ok Reg 1140,
				  eff 6-1-00; Amended at 18 Ok Reg 2019, eff 6-11-01; Amended at 28 Ok Reg 1282,
				  eff 7-1-11; Amended at 29 Ok Reg 1061, eff
				  7-1-12
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 656 - Water Pollution Control Facility Construction Standards › Subchapter 27 - Water Reuse › Section 252:656-27-1 - Categories of reclaimed water

Current through Vol. 41, No. 20, July 1, 2024
The following are the categories of and allowed uses for
				  reclaimed water:
(1)
Category
				1.
Reserved.
(2)
Category 2.
Category 2 reclaimed water shall only be used for the
				allowed uses in Categories 3, 4 and 5, and:
(A) drip irrigation on orchards or
				vineyards;
(B) spray or drip
				irrigation on sod farms, public access landscapes and public use areas/sports
				complexes, including unrestricted access golf courses;
(C) toilet and urinal flushing;
(D) fire protection systems;
(E) commercial closed-loop air conditioning
				systems;
(F) vehicle and equipment
				washing (excluding self-service car washes)
(G) range cattle watering ; and
(H) make-up water for oil and gas
				production.
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 656 - Water Pollution Control Facility Construction Standards › Subchapter 27 - Water Reuse › Section 252:656-27-2 - General provisions

Current through Vol. 41, No. 20, July 1, 2024
(a)
Prohibition against cross connections.
Permittees shall not allow
				physical connections between reclaimed water lines and public water supply
				lines. Permittees shall follow the requirements of OAC
				252:626-5-15
				and OAC
				252:656-9-2.
(b)
Separation distances.
Systems shall be designed to ensure that direct and wind-blown spray from
				irrigation systems and other sources are confined to the designated irrigation
				areas. Systems shall also be designed to comply with the following minimum
				buffer zones and setback distances, with all distances being measured from the
				edge of the wetted perimeter of the irrigation area to the edge of the
				following features:
(1)
Wells.
Permittees shall maintain the following separation distances from wells for all
				categories of reclaimed water:
(A) three
				hundred feet (300') from public wells; and
(B) fifty feet (50') from private water
				wells.
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 656 - Water Pollution Control Facility Construction Standards › Subchapter 27 - Water Reuse › Section 252:656-27-3 - Treatment

Current through Vol. 41, No. 20, July 1, 2024
(a)
Category 2 reclaimed water.
Water reuse systems generating Category 2 reclaimed water shall include the
				following:
(1)
Secondary
				treatment.
Asecondary suspended growth mechanical treatment process, or
				the equivalent approved by DEQ as a variance, capable of producing an effluent
				that conforms to the limits specified in Appendix A of OAC 252:627.
(2)
Nutrient removal.
A process
				in accordance with OAC
				252:656-16-3
				that will remove nutrients to the level required based on the final use of the
				reclaimed water. Systems may be exempt from the requirement to remove nutrients
				when documentation is provided to show that nutrients are utilized based on the
				agronomic and/or crop uptake rates of the final use.
(3)
Coagulation.
Coagulation
				with chemicals following the secondary treatment process.
(A) Coagulation, chemical feed and storage
				equipment shall meet the requirements of OAC 252:626-9 and OAC 252:626-11;
				and
(B) Rapid mix or inline static
				mixers shall be used to ensure the rapid dispersion and mixing of chemicals
				through the reclaimed water.
(4)
Filtration.
Granular media
				effluent filtration in accordance with OAC
				252:656-23-1.
(5)
Turbidimeters.
Continuous
				online turbidimeters with recording devices installed following filtration and
				prior to disinfection.
(6)
Disinfection.
Disinfection by chlorination or a combination of UV
				and chlorination in accordance with OAC 252:656-21 and OAC
				252:656-3-4(b)(7)(C).
				The method of disinfection shall achieve:
(A)
				5-log removal or inactivation of Adenovirus type 15;
(B) 5-log removal or inactivation of
Salmonella typhimurium
; and
(C) 3-log removal or inactivation of
Giardia lamblia
.
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 656 - Water Pollution Control Facility Construction Standards › Subchapter 27 - Water Reuse › Section 252:656-27-4 - Distribution systems

Current through Vol. 41, No. 20, July 1, 2024
(a)
Cautionary language required.
The following cautionary language is
				required for reclaimed water piping, valves, outlets and appurtenances in
				distribution systems.
(1) Effective July 1,
				2012, all reclaimed water piping, valves, outlets and appurtenances in
				distribution systems shall be colored purple (Pantone 522).
(2) Effective July 1, 2012, reclaimed water
				piping in a distribution system shall be embossed or integrally stamped on
				opposite sides every 3 feet with a warning that includes the following
				language: "CAUTION: RECLAIMED WATER-DO NOT DRINK."
(3) All reclaimed water piping installed
				prior to July 1, 2012, that does not comply with this subsection shall, at a
				minimum, be identified with above-ground signs containing the cautionary
				language in (2) of this subsection together with the international "Do Not
				Drink" symbol:
(A) every 300 feet;
(B) at every change in direction;
(C) in the road easement on both sides of the
				road at every road crossing; and
(D) at every outlet.
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 656 - Water Pollution Control Facility Construction Standards › Subchapter 27 - Water Reuse › Section 252:656-27-5 - Storage, retreatment and chlorination

Current through Vol. 41, No. 20, July 1, 2024
(a)
Storage.
Reclaimed water may
				be stored as follows:
(1)
Storage
				tanks.
Categories 2-5 reclaimed water may be stored in storage tanks
				that meet NSF or ASTM standards for public water supply storage
				tanks.
(2)
Open storage
				basins.
Categories 2 and 3 reclaimed water may be stored in open storage
				basins that are permitted and constructed in compliance with OAC
				252:656-11-3
				and operated as a lagoon in accordance with OAC 252:619 or OAC
				252:621.
(3)
Lagoons.
Categories 4 and 5 reclaimed water may be stored in lagoons that are permitted
				and constructed in compliance with OAC
				252:656-11-3
				and operated in accordance with OAC 252:619 or OAC 252-621.
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 656 - Water Pollution Control Facility Construction Standards › Appendix A - Design Tables

Current through Vol. 41, No. 20, July 1, 2024
OAC
				252:656-13-2(c)
				Aerated Grit Chambers:
Grit Chamber Measurement
						  Unitsa
Item
Unit
Range
Detention time at peak flowrate
Minutes
2-5
Dimension - Depth
Feet
7-16
Dimension - Length
Feet
25-65
Dimension - Width
Feet
8-23
Width to Depth Ratio
Ratio
From 1:1 to 5:1
Length to Width Ratio
Ratio
From 3:1 to 5:1
Air Supply per unit of Length
Feet3 per minute per foot
3-8
aChart from 1
Wastewater
				Engineering: Treatment, Disposal & Reuse
, Metcalf & Eddy,
				Inc., 4th Edition, (2003)
OAC
				252:656-16-1(d)(1),
				Activated Sludge Aeration Basins:
AERATION TANK CAPACITIES & PERMISSIBLE
						  LOADINGS FOR ACTIVATED SLUDGE PROCESSES
Type of Process
Aeration Retention timeb
Aeration Basin Loadingc
F/M Ratio
(Hours)
(lb BOD5 per 1,000
						  ft3/d)
(lb BOD5/lb MLSS)
Conventional
6-8
30-40
0.25 - 0.50
Step Aeration
6-8
30-50
0.17-0.50
Extended Aeration/Oxidation Ditch
24
12-15
0.05-0.10
bLarger values for smaller plants,
				up to 5,000 "PE" design capacity
cLarger values for larger plants,
				over 5,000 "PE" design capacity
OAC
				252:656-16-2(b),
				Trickling Filter Design:
DESIGN PARAMETERS FOR TRICKLING FILTERS
Hydraulic Loading
Organic Loading
gal/ft2/day
Million gallons/acre/day
Ibs BOD5/1000
						  ft3 of media/day
lbs BOD5/acre-ft of media/day
Standard Rate
45-90
2-4
5-12
218-523
High Rate
230-690
10-30
30-100
1300-4300
Added at 17 Ok Reg 1140,
				eff 6-1-00; Revoked and reenacted at 23 Ok Reg 937, eff 6-15-06; Revoked and
				reenacted at 28 Ok Reg 1282, eff 7-1-11
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 656 - Water Pollution Control Facility Construction Standards › Appendix B - Secondary and/or Final Clarifier Minimum Design Criteria

Current through Vol. 41, No. 20, July 1, 2024
Figure
				1
Added at 17 Ok Reg 1140,
				eff 6-1-00; Revoked and reenacted at 18 Ok Reg 2019, eff 6-11-01; Revoked and
				reenacted at 23 Ok Reg 937, eff 6-15-06; Revoked and reenacted at 28 Ok Reg
				1282, eff 7-1-11
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 656 - Water Pollution Control Facility Construction Standards › Appendix C - Cascade Aeration

Current through Vol. 41, No. 20, July 1, 2024
Figure
				1
Added at 17 Ok Reg 1140,
				eff 6-1-00; Revoked and reenacted at 28 Ok Reg 1282, eff
				7-1-11
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 690 - Water Quality Standards Implementation › Subchapter 1 - Introduction › Section 252:690-1-1 - Purpose and applicability

Current through Vol. 41, No. 20, July 1, 2024
This Chapter establishes guidance and requirements for DEQ
				  jurisdictional areas for the implementation of Oklahoma's Water Quality
				  Standards, found at OAC 252:730, pursuant to 27A O.S § 1-1-202(B),
which mandates each of the state's environmental agencies to promulgate
				  a Water Quality Standards Implementation Plan (WQSIP) by July 1, 2001, for its
				  jurisdictional areas of environmental responsibility in compliance with the
				  Administrative Procedures Act. Each state environmental agency is required to
				  review its WQSIP at least every three years thereafter to determine whether
				  revisions to the plan are necessary.
In addition to this subchapter,
				  the following rules may apply:
(1) OAC
				252:205, "Hazardous Waste Management;"
(2) OAC 252:220, "Brownfields;"
(3) OAC 252:301, "Laboratory
				Accreditation;"
(4) OAC 252:410,
				"Radiation Management;"
(5) OAC
				252:515, "Management of Solid Waste;"
(6) OAC 252:606, "Discharge
				Standards;"
(7) OAC 252:611,
				"General Water Quality;"
(8) OAC
				252:616, "Industrial Wastewater Systems;"
(9) OAC 252:619, "Operation and Maintenance
				of Non-Industrial Total Retention Lagoon Systems and Land
				Application;"
(10) OAC 252:621,
				"Non-Industrial Flow-Through and Public Water Supply Impoundments Including
				Land Application;"
(11) OAC
				252:626, "Public Water Supply Construction Standards;"
(12) OAC 252:631, "Public Water Supply
				Operation;"
(13) OAC 252:641,
				"Individual and Small Public On-Site Sewage Treatment Systems;"
(14) OAC 252:652, "Underground Injection
				Control;"
(15) OAC 252:656, "Water
				Pollution Control Facility Construction;" and
(16) OAC 252:710, "Waterworks and Wastewater
				Works Operator Certification."
Added at 19 Ok Reg 1721,
				  eff 6-13-02; Amended at 26 Ok Reg 1962, eff
				  7-1-09
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 690 - Water Quality Standards Implementation › Subchapter 1 - Introduction › Section 252:690-1-4 - Incorporation of EPA regulations by reference

Current through Vol. 41, No. 20, July 1, 2024
The following federal regulations at 40 CFR are incorporated
				  by reference and applicable to this Chapter:
(1)
OAC 252:205 (Hazardous Waste
				Management).
124.31, 124.32, & 124.33, substituting DEQ for EPA, and
				deleting the following sentence from each section: For the purposes of this
				section only, "Hazardous waste management units over which EPA has permit
				issuance authority" refers to hazardous waste management units for which the
				State where the units are located has not been authorized to issue RCRA permits
				pursuant to 40 CFR part 271.
(A)
Part
				260.
Hazardous Waste Management System: General, except 260.21.
(i) In 260.20, "Federal Register" is
				synonymous with "The Oklahoma Register."
(ii) In 260.20(e), strike the words "or a
				denial."
(iii) In 260.22,
				references to the lists in Subpart D of Part 261 and the reference to §
				261.3(a)(2)(ii) or C shall mean the lists in Subpart D of Part 261 and §
				261.3(a)(2)(ii) or C as adopted by reference and applicable in
				Oklahoma.
(iv) In the 260.10
				definitions of "new tank system" and "existing tank system", the reference to
				"July 14, 1986" for commencement of tank installation applies only to tank
				regulations promulgated pursuant to the federal Hazardous and Solid Waste
				Amendment ("HSWA") requirements. The following categories outline HSWA
				requirements:
(I) interim status and
				permitting requirements applicable to tank systems owned and operated by small
				quantity generators [3001(d)];
(II)
				leak detection requirements for all new underground tank systems [3004(o)(4)];
				and
(III) permitting standards for
				underground tanks that cannot be entered for inspection [3004(w)]. For tank
				regulations promulgated pursuant to statutory authority other than HSWA, the
				date relative to the commencement of installation is November 2,
				1987.
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 690 - Water Quality Standards Implementation › Subchapter 1 - Introduction › Section 252:690-1-4.1 - Date of federal regulations incorporated

Current through Vol. 41, No. 20, July 1, 2024
When reference is made to 40 C.F.R. it means, unless
				  otherwise specified, the volume of 40 C.F.R. as published on July 1,
				  2022.
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 690 - Water Quality Standards Implementation › Subchapter 1 - Introduction › Section 252:690-1-5 - Equations and tables

Current through Vol. 41, No. 20, July 1, 2024
All equations and tables in this chapter are located in the
				  Appendix with the corresponding letter (e.g. Equation G-1 is found in Appendix
				  G).
Added at 19 Ok Reg 1721,
				  eff 6-13-02
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 690 - Water Quality Standards Implementation › Subchapter 1 - Introduction › Section 252:690-1-6 - Relationship to other rules

Current through Vol. 41, No. 20, July 1, 2024
References are made in these rules to WQS, water quality
				  criteria, beneficial uses, antidegradation, and mixing zones. Rules regarding
				  these topics are promulgated by DEQ at OAC 252:730, as approved by EPA.
				  References are made in these rules to WQS implementation, eff.luent
				  characterization, reasonable potential, and regulatory receiving stream flows.
				  Rules regarding these topics are promulgated by DEQ at OAC 252:740. Provisions
				  in these rules provide additional procedures to implement the WQS, water
				  quality criteria, beneficial uses, antidegradation, and mixing zone rules for
				  regulatory purposes.
Added at 19 Ok Reg 1721,
				  eff 6-13-02
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 690 - Water Quality Standards Implementation › Subchapter 1 - Introduction › Section 252:690-1-7 - Water quality management planning

Current through Vol. 41, No. 20, July 1, 2024
DEQ will establish TMDLs for impaired waterbodies, including
				  wasteload allocations for point sources and load allocations for nonpoint
				  sources, in accordance with procedures described in the CPP. Development of
				  TMDLs may be coordinated with other state environmental agencies and natural
				  resource agencies. The WQMP shall be updated in accordance with the planning,
				  approval and public participation procedures described in the CPP whenever a
				  facility proposes a new discharge, seeks to increase the permitted discharge
				  flow rate or pollutant loading, relocate a discharge point, or when a TMDL is
				  adopted. DEQ will develop discharge permit limits that are consistent with any
				  WLA specified in the WQMP. Interim limits may be granted if a WLA has not been
				  included in the plan, along with a re-opener provision to incorporate any
				  additional requirements resulting from a subsequent WLA.
Added at 19 Ok Reg 1721,
				  eff 6-13-02; Amended at 28 Ok Reg 1316, eff
				  7-1-11
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 690 - Water Quality Standards Implementation › Subchapter 3 - Point Source Discharges › Section 252:690-3-1 - Quantitative effluent data in permit application

Current through Vol. 41, No. 20, July 1, 2024
Permit applicants must submit all information required in DEQ
				  permit application forms or requested during application review and use
				  analytical methods listed at 40 CFR Part 136 or other EPA approved methods.
				  Where there is no approved analytical method listed, the applicant must fully
				  describe the method used for EPA and DEQ review and obtain approval prior to
				  utilizing these data. All data submitted must be defensible analytical
				  data.
Added at 19 Ok Reg 1721,
				  eff 6-13-02
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 690 - Water Quality Standards Implementation › Subchapter 3 - Point Source Discharges › Section 252:690-3-2 - Measurable levels and data characterization

Current through Vol. 41, No. 20, July 1, 2024
Measurable levels for effluent and background data shall be
				  less than or equal to the MQLs established in Appendix B of this Chapter. Where
				  a pollutant has an established MQL, DEQ will include a provision in the permit
				  requiring the measurable levels be less than or equal to the MQL. Data will be
				  characterized as follows:
(1) Where a
				background or effluent concentration data set reflects some measurable and some
				unmeasurable levels of a substance at or below the MQL, DEQ will use Robust ROS
				to estimate the unmeasurable quantities. When there are fewer than three (3)
				measurable data points, DEQ will use one-half (1/2) of the MQL to estimate the
				unmeasurable quantities and not Robust ROS.
(2) If a substance is unmeasurable in all
				samples collected for a background or effluent concentration data set, DEQ will
				use a zero level.
(3) If analytical
				data submitted does not meet the established MQL, DEQ will allow the permit
				applicant to provide additional data that meets the established MQL. If the
				applicant does not do so, DEQ will assume the substance is present at the
				reported measurable level.
Added at 19 Ok Reg 1721,
				  eff 6-13-02; Amended at 24 Ok Reg 1542, eff 6-15-07; Amended at 28 Ok Reg 1316,
				  eff 7-1-11
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 690 - Water Quality Standards Implementation › Subchapter 3 - Point Source Discharges › Section 252:690-3-3 - Effluent characterization for determining reasonable potential

Current through Vol. 41, No. 20, July 1, 2024
An effluent's C95 concentration is used to characterize the
				  effluent to determine if there is reasonable potential for a substance. Permit
				  applicants must retain all analytical laboratory reports used for effluent
				  characterization in a permit application and provide copies to the DEQ upon
				  request. Where DMRs or facility records are used to characterize effluent the
				  DEQ will use, at a minimum, the most recent two-year period of record. When
				  characterizing whole effluent toxicity, the DEQ may use the most recent
				  five-year period of record. Effluent monitoring data must be defensible
				  analytical data, must be representative of the discharge, and must account for
				  any seasonality or other variability in effluent quality. For reasonable
				  potential determination, see OAC 252:690-3-3 through 3-9.
Added at 19 Ok Reg 1721,
				  eff 6-13-02; Amended at 24 Ok Reg 1542, eff
				  6-15-07
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 690 - Water Quality Standards Implementation › Subchapter 3 - Point Source Discharges › Section 252:690-3-4 - Effluent characterization for determining reasonable potential for parameters other than temperature

Current through Vol. 41, No. 20, July 1, 2024
Arithmetic and/or geometric means are calculated wherever
				  there are two or more available data points. Effluent data sets comprised of at
				  least 10 data points are required to determine standard
				  deviations.
Added at 19 Ok Reg 1721,
				  eff 6-13-02
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 690 - Water Quality Standards Implementation › Subchapter 3 - Point Source Discharges › Section 252:690-3-5 - CE(mean) for effluent characterization for determining reasonable potential for parameters other than temperature

Current through Vol. 41, No. 20, July 1, 2024
Geometric means shall be usedwhen at least ten (10)
				  individual data points are available. A geometric mean shall be calculated
				  using individual measurement values. Geometric means may not be calculated
				  using DMR monthly averages, unless the DMR monthly average is the result of
				  only two measurements. If fewer than ten (10) data points are available, the
				  arithmetic mean shall be used. Arithmetic and geometric means shall be
				  calculated according to Equations C-1 and C-2 in Appendix C,
				  respectively.
Added at 19 Ok Reg 1721, eff 6-13-02 ; Amended at 30 Ok
					 Reg 1097, eff 7-1-13