reglab/statecodes huggingface dataset:
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 690 - Water Quality Standards Implementation › Subchapter 3 - Point Source Discharges › Section 252:690-3-6 - CE(max) for effluent characterization for determining reasonable potential for parameters other than temperature

Current through Vol. 41, No. 20, July 1, 2024
CE(max) for a substance is determined from the available
				  effluent data, or is estimated by the permittee in the permit application for a
				  new discharge.
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 252:690-3-7 - Coefficient of variation for parameters other than temperature

Current through Vol. 41, No. 20, July 1, 2024
The CV is calculated according to Equation C-5. If fewer than
				  10 effluent data points are available, a value of 0.6 is assumed for
				  CV.
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 252:690-3-8 - C95 for determining reasonable potential for parameters other than temperature

Current through Vol. 41, No. 20, July 1, 2024
(a)
Existing discharges.
If fewer than ten (10) effluent data points
				are available, the C 95 effluent concentration is determined by multiplying C
				E(mean) by 2.135 where C E(mean) is the arithmetic mean. If only a single
				effluent data point is available, it is C E(mean) for the purpose of
				determining C 95 . Where ten (10) or more effluent data points are available,
				the C 95 concentration is calculated directly from the effluent data set
				according to Equation C-8.
(b)
New discharges.
For new discharges, C 95 is estimated by
				multiplying the expected average effluent quality, C E(mean) , by 2.135. Where
				new industrial facility discharges include cooling tower blowdown from a
				recirculating cooling water system, permit applicants must submit the results
				of at least three (3) water samples collected from the cooling water source.
				The samples must be collected on different days no more than one (1) year prior
				to submission of the application. The applicant must estimate the C 95
				concentration of the blowdown discharge using the source water monitoring data,
				based on the projected number of recirculation cycles.
Added at 19 Ok Reg 1721, eff 6-13-02 ; Amended at 30 Ok
					 Reg 1097, eff 7-1-13
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 690 - Water Quality Standards Implementation › Subchapter 3 - Point Source Discharges › Section 252:690-3-9 - Effluent characterization for determining reasonable potential for effluent temperature

Current through Vol. 41, No. 20, July 1, 2024
(a)
T
95
.
Where there is a thermal
				component to a discharge, T95 is used to determine reasonable
				potential.
(b)
Existing
				discharges.
If a daily maximum effluent temperature distribution is
				available, then the DEQ will determine T95 directly from the untransformed data
				distribution. If the temperature distribution is unknown, the highest daily
				maximum effluent temperature is used for T95. A temperature CV of 0.6 is
				assumed unless the temperature CV is determined from the effluent temperature
				distribution.
(c)
New
				discharges.
Permit applicants for new facilities or new discharges at
				existing facilities must estimate T95 through engineering
				calculations.
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 252:690-3-10 - Receiving water background characterization

Current through Vol. 41, No. 20, July 1, 2024
Where available, the DEQ will include upstream background
				  levels of substances in assessing the reasonable potential evaluation and in
				  calculating wasteload allocations. For background characterizations, see OAC
				  252:690-3-10 through 3-16.
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 252:690-3-11 - Receiving water background characterization requirements

Current through Vol. 41, No. 20, July 1, 2024
(a)
Long-term average.
Where
				required, the DEQ will calculate a LTA background level of a substance as a
				geometric mean unless otherwise specified.
(b)
Background data sources.
Background data must be defensible analytical data and be representative of the
				receiving water's current upstream conditions. DEQ will use data collected and
				reported in accordance with a background monitoring requirement in a previous
				permit where available.
(c)
Unavailability of background data.
Where no background data is
				available, the background is assumed to be zero.
(d)
Size of background data set.
At least 10 data points are required for a background data set to be considered
				complete. DEQ may use a partial background data set for reasonable potential
				purposes if the data is the only defensible analytical data available. Where
				the use of a partial background data set results in demonstration of reasonable
				potential, the permit will include effluent limitations based on a zero
				background level, which may have a delayed effective date of no more than two
				years. The permit will require the permittee to complete the background
				monitoring, at which time DEQ will reopen the permit, if necessary, to adjust
				permit limitations according to the background level determined from a complete
				background data set.
(e)
Alternative Method for Determination of 7Q2.
(1) A permittee may use an alternative method
				for determining a 7Q2 as allowed by OAC
				252:740-1-6(c).
				The 7Q2 calculated from the historical record may be modified to incorporate
				anticipated upstream flow releases provided the source of water is owned or
				controlled by a federal governmental entity and the following information is
				submitted toDEQ:
(A) a determination that a
				reliable source of upstream flow exists;
(B) documentation that the upstream source of
				water:
(i) includes water quality improvement
				as an authorized use, or
(ii)
				includes allocated storage for water quality improvement;
(C) documentation that the upstream source of
				water is governed by a water control plan developed and implemented pursuant to
				33 C.F.R. §
												222.5; and
(D) a demonstration that the alternative 7Q2
				is identified in the most recently published State Water Quality Management
				Plan.
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 690 - Water Quality Standards Implementation › Subchapter 3 - Point Source Discharges › Section 252:690-3-12 - Background monitoring and frequency

Current through Vol. 41, No. 20, July 1, 2024
When effluent limits have not been established and a complete
				  background data set that meets the requirements of OAC
				  252:690-3-11
				  is not available, , the appropriate BT/C equation in Appendix J shall be used
				  to determine whether background monitoring is required. If the BT/C ratio is
				  less than or equal to the (BT/C) max value using the appropriate equation in
				  Appendix J, background monitoring is required and the monitoring frequency must
				  be sufficient to provide at least ten (10) data points over a period of one
				  year. The collected background data shall be used in conjunction with the
				  effluent data to determine if there is reasonable potential for the effluent to
				  violate water quality standards.
Added at 19 Ok Reg 1721, eff 6-13-02 ; Amended at 30 Ok
					 Reg 1097, eff 7-1-13
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 690 - Water Quality Standards Implementation › Subchapter 3 - Point Source Discharges › Section 252:690-3-13 - Background monitoring location

Current through Vol. 41, No. 20, July 1, 2024
(a)
Streams.
The permittee must collect background samples at a point
				away from the stream bank, as close as is feasible to the channel, immediately
				upstream of the point of discharge, but not affected by it.
(b)
Lakes.
The permittee must
				collect background samples at a point away from the waters edge and outside the
				regulatory mixing zone.
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 252:690-3-14 - Requirements specific to numeric criteria for toxic substances for the Fish and Wildlife propagation beneficial use

Current through Vol. 41, No. 20, July 1, 2024
(a)
Background assumed zero.
DEQ
				will assume zero background levels for direct discharges of once through
				cooling water.
(b)
Hardness
				or pH dependent criteria.
Where a criterion for a pollutant is hardness
				or pH-dependent, DEQ will add hardness or pH monitoring, as appropriate, to the
				background monitoring requirements.
(c)
Representative of low flow
				conditions in streams.
The permittee shall collect background samples as
				close to low flow conditions as possible in streams.
(d)
Background data from a previous
				permit.
DEQ will not use background data referenced in the fact sheet or
				statement of basis of a previous permit unless the data is defensible
				analytical data.
(e)
Background monitoring.
Where toxicity-based effluent limitations
				for a substance are established in a permit and a complete background data set
				meeting the requirements of OAC
				252:690-3-11
				is not available, background monitoring of the limited substance is required.
				This requirement does not apply where the background shall be considered equal
				to zero in accordance with OAC 252:690-3-14(a), where Q* $ 0.333, or where the
				7Q2 of the receiving stream is assumed to be 1 cfs.
Added at 19 Ok Reg 1721,
				  eff 6-13-02; Amended at 22 Ok Reg 1477, eff 6-15-05; 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 252:690-3-15 - Requirements specific to human health criteria

Current through Vol. 41, No. 20, July 1, 2024
Where available, the DEQ will use background data
				  representative of the LTA upstream concentration. Where human health-based or
				  raw water column-based effluent limitations for a substance are established in
				  a permit based on a zero background assumption, background monitoring of the
				  limited substance is required.
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 252:690-3-16 - Requirements specific to agriculture criteria

Current through Vol. 41, No. 20, July 1, 2024
(a)
Historical data.
If site-specific background defensible analytical
				data is not available, DEQ will use the YMS and SS criteria in OAC 252:730,
				Appendix F, to determine the background concentrations of the mineral
				constituents. In the absence of listed YMS and SS criteria specific to the
				receiving water of interest, the segment averaged YMS and SS criteria are used
				to establish the background concentrations of the mineral constituents.
				CB is calculated according to Equation C-11 in Appendix
				C.
(b)
Site-specific
				background data available.
Where a site-specific background data set of
				at least 10 data points is available, DEQ may use the arithmetic average of the
				site-specific background data set instead of a background level determined from
				the segment-averaged YMS and SS values in OAC 252:730, Appendix F.
(c)
Background monitoring.
Where
				agriculture criteria-based limitations are established in a permit, DEQ may
				require background monitoring of the limited mineral constituent(s) to
				determine site-specific conditions.
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 252:690-3-17 - Implementation of narrative toxicity criterion for the Fish and Wildlife Propagation beneficial use using whole effluent toxicity

Current through Vol. 41, No. 20, July 1, 2024
For implementation of the narrative criterion, see OAC
				  252:690-3-17 through 3-43.
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 252:690-3-18 - Reasonable potential to exceed narrative toxicity criterion for the Fish and Wildlife Propagation beneficial use utilizing whole effluent toxicity

Current through Vol. 41, No. 20, July 1, 2024
See OAC 252:740.
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 252:690-3-19 - TREs, TIEs and WET limits

Current through Vol. 41, No. 20, July 1, 2024
(a)
TRE and TIE.
A TRE is required when persistent toxicity is
				demonstrated. When intermittent toxicity is demonstrated, DEQ may require a
				TRE/TIE.
(b)
WET
				limits.
DEQ shall incorporate a WET limit into a permit for the species
				affected by whole effluent toxicity upon the completion of a TRE /TIE, unless
				DEQ determines that chemical-specific effluent limits or toxicity-specific
				management practices in accordance with OAC
				252:690-3-27
				are sufficient to comply with the narrative toxicity criterion and protect the
				designated use. DEQ may also incorporate a WET limit or chemical-specific
				effluent limits into a permit when reasonable potential is
				established.
(c)
Effective
				date of WET limit.
The effective date of a WET limit or a
				chemical-specific limit may be deferred up to three (3) years from the date of
				completion of the TRE /TIE or the effective date of a permit, as applicable.
				The effective date of toxicity-specific management practices may be deferred up
				to one (1) year from the date of completion of the TRE /TIE or the effective
				date of a permit, as applicable.
Added at 19 Ok Reg 1721, eff 6-13-02 ; Amended at 24 Ok
					 Reg 1542, eff 6-15-07 ; Amended at 26 Ok Reg 1962, eff 7-1-09 ; Amended at 28
					 Ok Reg 1316, eff 7-1-11 ; Amended at 30 Ok Reg 1097, eff
					 7-1-13
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 690 - Water Quality Standards Implementation › Subchapter 3 - Point Source Discharges › Section 252:690-3-20 - Interim strategy for implementation of narrative toxicity criterion for ammonia

Current through Vol. 41, No. 20, July 1, 2024
The DEQ will use the interim strategy described in OAC
				  252:690-3-20 through 3-26 for implementation of the narrative toxicity
				  criterion for ammonia for major municipalities which have DO-based WLAs for
				  ammonia and for major industries which produce ammonia as a commercial product
				  or as a by-product of their industrial processes, or which have
				  technology-based ammonia limits or DO-based ammonia WLAs.
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 252:690-3-21 - Reasonable potential for ammonia

Current through Vol. 41, No. 20, July 1, 2024
See OAC 252:740.
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 252:690-3-22 - Toxicity-based permit limit development for ammonia

Current through Vol. 41, No. 20, July 1, 2024
Toxicity-based permit limitations are determined using the
				  chronic screening value of 6 mg/l, a CV of 0.6, a zero background concentration
				  (unless known to be otherwise), the regulatory flows described at OAC
				  252:690-3-52,
				  and chronic mixing zone equations described at OAC
				  252:690-3-55
				  through 3-57. The toxicity-based MAL is based on a monitoring frequency of
				  3/week.
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 252:690-3-23 - Comparison of toxicity-based limitations with other ammonia limitations

Current through Vol. 41, No. 20, July 1, 2024
The most stringent MAL for a given season determines the
				  final permit limits. DMLs or WALs follow the type of MAL established in the
				  permit.
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 252:690-3-24 - Effective date of toxicity-based ammonia limits

Current through Vol. 41, No. 20, July 1, 2024
Effective dates for toxicity-based ammonia limits may be
				  deferred up to three years with an approved schedule for compliance if the DEQ
				  determines that a facility is unable to comply with the limit through proper
				  operation and maintenance of the existing treatment works.
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 252:690-3-25 - Concurrent ammonia, pH and WET testing

Current through Vol. 41, No. 20, July 1, 2024
Permits will require permittees to measure both total ammonia
				  and pH levels on all samples collected for WET testing of fathead minnow
				  species. This applies only to facilities described in OAC
				  252:690-3-20.
				  Permits may include a reopener clause for the purpose of increasing or
				  decreasing ammonia limits if warranted.
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 252:690-3-26 - Monitoring frequencies for ammonia

Current through Vol. 41, No. 20, July 1, 2024
Where ammonia limits are toxicity-based, permits will require
				  the permittee to monitor ammonia at a frequency of three (3) times per week. At
				  any time during the term of a permit, where the permittee has completed twelve
				  (12) consecutive reporting periods subject to toxicity based ammonia limits
				  where the highest daily maximum concentration did not exceed 1.5 times the
				  toxicity based MAL and there were not exceedances of the monthly average or
				  daily maximum limits for ammonia, the permittee may request a reduction of the
				  ammonia monitoring frequency to one (1) time per week. If WET test failures
				  attributable to ammonia are experienced at any time during the term of a
				  permit, or there are exceedances of the monthly average limit or daily maximum
				  limit for ammonia, the ammonia monitoring frequency must be continued at or be
				  returned to three (3) times per week. If there are no WET test failures
				  attributable to ammonia and no exceedances of either the monthly average limit
				  or the daily maximum limit for ammonia following a reduction of the monitoring
				  frequency for toxicity-based ammonia limits to one (1) time per week, the
				  reduced ammonia monitoring frequency may be continued in the ensuing permit
				  cycle. This paragraph does not apply to ammonia monitoring required to be
				  performed concurrently with WET testing.
Added at 19 Ok Reg 1721,
				  eff 6-13-02; Amended at 22 Ok Reg 1477, eff 6-15-05; 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 252:690-3-27 - Intermittent toxicity

Current through Vol. 41, No. 20, July 1, 2024
Where the permittee has demonstrated intermittent toxicity in
				  either acute or chronic WET testing, the DEQ will require an increase in the
				  frequency of WET testing and may require the permittee to perform a TRE/TIE for
				  the affected species. A WET limit, chemical-specific numerical limit, or
				  toxicity-specific management practice may be required at the completion of a
				  TRE/TIE if the DEQ determines it is warranted.
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 3 - Point Source Discharges › Section 252:690-3-28 - Toxicity from halogens

Current through Vol. 41, No. 20, July 1, 2024
Toxicity from halogens (chlorine, bromine, and bromo-chloro
				  compounds) will be controlled by dehalogenation and chemical-specific limits.
				  The dehalogenation requirement is implemented as "no measurable amount" in an
				  effluent, less than 0.1 mg/l for halogenated oxidants. Where halogenated
				  oxidants other than or in addition to chlorine are used, the permit limitation
				  will be expressed as TRO rather than TRC. Permits will reference the approved
				  40 CFR Part 136 analytical method for TRC when expressing permit limitations in
				  terms of TRO.
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 252:690-3-29 - WET testing methods

Current through Vol. 41, No. 20, July 1, 2024
The specific tests and test organisms used for determining
				  whole effluent toxicity include:
(1)
Acute test/
D.
pulex
.
Acute 48-hour static renewal toxicity test using
Daphia pulex
(Method 2021.0) as described in EPA publication no. 821-R-02-012 (October
				2002),Fifth Edition, Methods for Measuring the Acute Toxicity of Effluent to
				Freshwater and Marine Organisms.
(2)
Acute
				test/
P.
promelas.
Acute 48-hour static
				renewal toxicity test using
Pimephales promelas
(Method
				2000.0) as described in EPA publication no. 821-R-02-012 (October 2002), Fifth
				Editon, Methods for Measuring the Acute Toxicity of Effluent to Freshwater and
				Marine Organisms.
(3)
Chronic
				test/
C.
dubia
.
Chronic
				7-day static renewal survival and reproduction test using
Ceriodaphnia
				dubia
(Method 1002.0), as described in EPA publication no.
				821-R-02-013 (October 2002), Fourth Edition, Short Term Methods for Estimating
				the Chronic Toxicity of Effluents and Receiving Waters to Freshwater
				Organisms.
(4)
Chronic
				test/
P.
promelas
.
Chronic
				7-day static renewal larval survival and growth test using
Pimephales
				promelas
(fathead minnow) (Method 1000.0), as described in EPA
				publication no. 821-R-02-013 (October 2002), Fourth Edition, Short Term Methods
				for Estimating the Chronic Toxicity of Effluents and Receiving Waters to
				Freshwater Organisms.
(5)
Acute test/
D.
Magna.
Acute
				48-hour static renewal toxicity test using
Daphnia magna
(Method 2021.0), as described in EPA Publication No. 821-R-02-012 (October,
				2002), fifth edition,
Methods for Measuring the Acute Toxicity Of
				Effluent to Freshwater and Marine Organisms.
(6)
Chronic
				test/
D.
Magna.
Chronic 21-day static
				renewal life-cycle toxicity test using
Daphnia magna
, (ASTM
				Designation E-1193), as described in ASTM Publication E-1193-97 (Reapproved
				2004),
Standard Guide for Conducting Daphnia Magna Life Cycle Toxicity
				Tests.
(7)
Acute
				test/Mussels.
Acute toxicity test using mussels (ASTM Designation E-2455)
				as described in ASTM Publication E-2455-06 (Approved April, 2006),
Standard Guide for Conducting Laboratory Toxicity Test with Freshwater
				Mussels.
Added at 19 Ok Reg 1721,
				  eff 6-13-02; Amended at 22 Ok Reg 1477, eff 6-15-05; 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 252:690-3-30 - Concurrent chemical-specific sampling and analysis

Current through Vol. 41, No. 20, July 1, 2024
The DEQ may require concurrent chemical-specific analyses on
				  samples collected for WET testing purposes where there is reason to believe
				  substances may cause or contribute to whole effluent toxicity. Permittees must
				  submit the results of concurrent chemical-specific testing with the WET test
				  report. Permittees must collect sufficient sample volumes for the testing
				  laboratory to perform concurrent chemical-specific testing in addition to the
				  WET testing.
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 252:690-3-31 - WET test requirements

Current through Vol. 41, No. 20, July 1, 2024
WET testing is required for all major dischargers and those
				  minor dischargers identified by DEQ as posing a significant unaddressed toxic
				  risk. Q* is calculated as described in Appendix D.
(1) The following requirements apply to all
				WET testing:
(A)
Acute testing
				only.
Acute testing only is required for all discharges to lakes and
				where Q* < 0.054 in streams.
(B)
Chronic testing only.
Chronic testing only is required where Q*
				> 0.3333.
(C)
Acute and
				chronic testing, except for
Daphnia Magna
.
Both acute and chronic testing are required where 0.054 #Q* # 0.3333.
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 690 - Water Quality Standards Implementation › Subchapter 3 - Point Source Discharges › Section 252:690-3-32 - Test failure notification and retesting

Current through Vol. 41, No. 20, July 1, 2024
Permittees shall notify DEQ by telephone within twenty-four
				  (24) hours and in writing within five (5) days of becoming aware of a WET test
				  failure and shall perform WET tests/retests on the affected test species. WET
				  tests/retests are required as follows:
(1)
WET limits.
If a permit
				contains a WET limit, monthly WET tests of the same type as the failed test are
				required.
(A) If the permittee achieves three
				(3) consecutive passing tests, the permittee may return to its routine WET
				testing frequency.
(B) If three (3)
				consecutive passing tests cannot be achieved in six (6) months, DEQ may require
				further action, including the possibility of a TIE or a TRE.
(C) If a TIE or a TRE is required or the
				permittee is in the process of implementing toxicity reduction measures that
				have resulted from a completed TRE related to the type of failure in question,
				the permittee may return to its routine WET testing frequency.
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 690 - Water Quality Standards Implementation › Subchapter 3 - Point Source Discharges › Section 252:690-3-33 - WET testing dilution series

Current through Vol. 41, No. 20, July 1, 2024
All WET testing will utilize a 0.75 dilution series as
				  described in Tables D-1 and D-2.
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 252:690-3-34 - Test duration for WET tests

Current through Vol. 41, No. 20, July 1, 2024
The appropriate WET test duration is specified in the
				  specific test method pursuant to OAC
				  252:690-3-29.
Added at 19 Ok Reg 1721,
				  eff 6-13-02; Amended at 22 Ok Reg 1477, eff 6-15-05; 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 3 - Point Source Discharges › Section 252:690-3-35 - Critical dilution for WET tests

Current through Vol. 41, No. 20, July 1, 2024
The following applies for dilutions for WET tests:
(1)
Acute testing.
The ACD is
				100%.
(2)
Chronic
				testing.
The CCD is calculated according to Equation D-1, D-2 or D-3,
				depending on the value of Q*.
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 252:690-3-36 - Dilution water for discharges to intermittent streams

Current through Vol. 41, No. 20, July 1, 2024
For discharges to intermittent streams where there is no
				  receiving water available when the sample is collected, permittees must use
				  synthetic dilution water having a pH, hardness, and alkalinity similar to that
				  of the closest downstream perennial water.
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 252:690-3-37 - WET test dilution water for discharges to perennial streams and lakes

Current through Vol. 41, No. 20, July 1, 2024
For discharges to perennial streams or lakes, permittees must
				  use receiving water collected as close to the point of discharge as possible
				  but unaffected by the discharge. Receiving water must be collected outside the
				  regulatory mixing zone for discharges to lakes. If the receiving water control
				  fails to fulfill the test acceptability criteria in OAC
				  252:690-3-38,
				  the permittee must substitute synthetic dilution water for the receiving water
				  in all subsequent tests, provided:
(1)
				a synthetic dilution water control which fulfills the test acceptability
				requirements in OAC
				252:690-3-38
				was run concurrently with the receiving water control.
(2) the test indicating receiving water
				toxicity was carried out to completion.
(3) the synthetic dilution water had a pH,
				hardness and alkalinity similar to that of the receiving water, provided the
				magnitude of these three parameters did not cause toxicity in the synthetic
				dilution water.
(4) the receiving
				water test must be conducted at the start of each permitting cycle.
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 3 - Point Source Discharges › Section 252:690-3-38 - Test acceptability

Current through Vol. 41, No. 20, July 1, 2024
Test acceptability requirements will be specified in the
				  permit. If a WET test does not meet all of the acceptability requirements of
				  the test method plus those specified in the permit, the permittee must conduct
				  a repeat test for the affected test species within the required reporting
				  period.
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 252:690-3-39 - Endpoint and test failure criteria for acute tests

Current through Vol. 41, No. 20, July 1, 2024
The endpoint for routine acute WET testing and retesting is
				  the LC50. Acute test failure is greater than or equal to 50% mortality to a
				  test species, as specified in OAC
				  252:690-3-29.
				  Statistical analysis must be consistent with the methods described in the
				  documents referenced in OAC
				  252:690-3-29.
				  Where a WET limit is established, it is expressed as an LC50 effluent
				  concentration and must be greater than 100% (>100%).
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 3 - Point Source Discharges › Section 252:690-3-40 - Endpoint and test failure criteria for chronic tests

Current through Vol. 41, No. 20, July 1, 2024
The endpoint for lethality for chronic WET testing and
				  retesting is the NOECL. The endpoint for sublethality
				  for routine chronic WET testing and retesting is the
				  NOECS. Statistical analysis must be consistent with the
				  methods described in the documents referenced in OAC
				  252:690-3-29. For chronic test
				  failure, see OAC 252:730.
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 3 - Point Source Discharges › Section 252:690-3-41 - WET testing frequency and trial period

Current through Vol. 41, No. 20, July 1, 2024
(a) The frequency of WET testing is once per
				quarter. Monitoring frequency reductions will not be granted during the first
				five years in which WET testing is required.
(b) Monitoring frequency reductions may be
				granted in a second or subsequent permit renewal in accordance with OAC
				252:690-3-42
				after completion of a specified trial period. The minimum WET testing trial
				period is one year. The length of the WET testing trial period will be
				specified in the second or subsequent permit and will be established by DEQ
				based on whether and the degree to which a facility poses an increased toxicity
				risk due to the nature of its activities (e.g., accepting external waste
				streams, a history of WET test failures, or reported discharges of toxic
				compounds in toxic amounts).
(c) If
				DEQ determines that an increased toxicity risk so warrants, quarterly or more
				frequent testing may be required for the life of the permit.
Added at 19 Ok Reg 1721,
				  eff 6-13-02; Amended at 22 Ok Reg 1477, eff 6-15-05; 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 252:690-3-42 - WET testing frequency reductions after WET testing trial period

Current through Vol. 41, No. 20, July 1, 2024
Permittees may request reduction of the WET testing frequency
				  for the remaining term of the permit depending on the results of WET testing
				  during the WET testing trial period. Any reduction will be considered on a test
				  species-specific basis. To qualify for a WET testing frequency reduction, the
				  permittee shall certify that tests submitted in fulfillment of its WET testing
				  requirements during the WET testing trial period meet all test acceptability
				  criteria set forth in OAC
				  252:690-3-38
				  and EPA WET test method documents. In addition the following apply:
(1)
WET testing established in
				permit.
Reductions in WET testing frequency are not allowed during the
				first five years of the applicability of WET testing. DEQ may consider a
				reduced testing frequency when the permit is renewed, after completion of a
				trial period.
(2)
No test
				failure for a species during WET testing trial period.
DEQ may reduce
				the testing frequency for a species to not less than once per six months. If
				the monitoring frequency reduction is denied, the permittee shall continue WET
				testing at a frequency of once per quarter for the affected species for the
				remaining life of the permit.
(A) To be
				eligible, the permittee shall:
(i) demonstrate
				no lethal or sublethal test failures for the applicable test species during the
				WET testing trial period; and
(ii)
				certify in writing to DEQ that it has fulfilled the test acceptability
				requirements set forth in OAC
				252:690-3-38;
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 690 - Water Quality Standards Implementation › Subchapter 3 - Point Source Discharges › Section 252:690-3-43 - Concurrent acute and chronic WET testing

Current through Vol. 41, No. 20, July 1, 2024
The following applies to concurrent acute and chronic WET
				  testing:
(1)
General.
The
				requirements in OAC
				252:690-3-29
				through
				252:690-3-42
				apply.
(2)
Retests.
Retests required as a result of acute test failure only are not required to
				include chronic retesting. Similarly, retests required as a result of chronic
				test failure only are not required to include acute retesting.
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 252:690-3-44 - Implementation of temperature criteria to protect the Fish and Wildlife Propagation beneficial use

Current through Vol. 41, No. 20, July 1, 2024
For implementation of the temperature criterion, see OAC
				  252:690-3-44 through 3-50. This criterion applies to facilities which have a
				  thermal component to their discharge.
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 252:690-3-45 - Effluent regulatory flows for the implementation of temperature criteria to protect the Fish and Wildlife Propagation beneficial use

Current through Vol. 41, No. 20, July 1, 2024
The following effluent regulatory flows apply for the
				  implementation of the temperature criterion to protect the Fish and Wildliife
				  Propagation beneficial use:
(1)
Industrial.
For industries, Qe(30) is used.
(2)
Municipal.
For
				municipalities treating industrial wastewater having a thermal component, Qe(D)
				is used.
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 252:690-3-46 - Q* ratio for the implementation of temperature criteria to protect the Fish and Wildlife Propagation beneficial use

Current through Vol. 41, No. 20, July 1, 2024
The following applies to the determination of Q*:
(1)
Streams.
The following apply
				to streams:
(A)
Industrial
				effluent.
Q* is the ratio of Q e(30) to
				Qu(7Q2).
(B)
Municipal effluent.
For municipalities treating industrial
				wastewater with a thermal component, Q* is the ratio of Q
				e(D) to Q u(7Q2).
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 690 - Water Quality Standards Implementation › Subchapter 3 - Point Source Discharges › Section 252:690-3-47 - Reasonable potential to exceed temperature criterion for the implementation of temperature criteria to protect the Fish and Wildlife Propagation beneficial use

Current through Vol. 41, No. 20, July 1, 2024
See OAC 252:740.
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 252:690-3-48 - WLAT

Current through Vol. 41, No. 20, July 1, 2024
If reasonable potential is demonstrated, WLAT is
				  required.
(1)
Streams.
Except for streams designated as trout fisheries, Equation E-1, E-2 or E-3 is
				used to determine WLAT, depending on the value of Q*. WLAT for trout fisheries
				is 20°C.
(2)
Lakes.
Depending on whether the discharge conveyance is a pipe or
				canal, Equation E-4 or E-5 is used to determine WLAT.
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 252:690-3-49 - LTAT

Current through Vol. 41, No. 20, July 1, 2024
LTAT is calculated using a 50% probability basis according to
				  Equation E-6. A CV value of 0.6 is assumed unless a CV was determined from
				  effluent data in accordance with OAC
				  252:690-3-9(b).
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 252:690-3-50 - Development of permit limitations for the implementation of temperature criteria to protect the Fish and Wildlife Propagation beneficial use

Current through Vol. 41, No. 20, July 1, 2024
MALT and WALT are calculated according to Equations E-7 and
				  8, respectively. If either the calculated MALT or calculated WALT exceeds
				  52°C, it is capped at 52°C. A DMLT of 52°C is required if T95, the
				  calculated MALT or the calculated WALT exceeds 52°C.
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 252:690-3-51 - Implementation of numerical criteria for toxic substances to protect the Fish and Wildlife Propagation beneficial use

Current through Vol. 41, No. 20, July 1, 2024
Aquatic toxicity numerical criteria apply to all discharges.
				  For implementation, see OAC 252:690-3-51 through 3-57.
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 252:690-3-52 - Effluent regulatory flows for the implementation of numerical criteria for toxic substances to protect the Fish and Wildlife Propagation beneficial use

Current through Vol. 41, No. 20, July 1, 2024
The following effluent regulatory flows apply for the
				  implementation of numerical toxicity criteria for conservative substances to
				  protect the Fish and Wildlife Propagation beneficial use:
(1)
Industrial.
For industrial
				facilities, Qe(30) is used as the regulatory effluent flow.
(2)
Municipal.
The treatment
				facility's design flow Qe(D) is used as the regulatory effluent flow. The
				design flow used for permitting purposes will not exceed the approved design
				flow in the WQMP.
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 252:690-3-53 - Q* ratio for the implementation of numerical criteria for toxic substances to protect the Fish and Wildlife Propagation beneficial use

Current through Vol. 41, No. 20, July 1, 2024
Use the following to determine Q* ratio:
(1) The following are used to determine Q*
				ratios in streams:
(A)
Industrial
				effluent.
Q* is the ratio of Qe(30) to Qu(7Q2).
(B)
Municipal effluent.
Q* is
				the ratio of Qe(D) to Qu(7Q2).
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 690 - Water Quality Standards Implementation › Subchapter 3 - Point Source Discharges › Section 252:690-3-54 - Reasonable potential determination for the implementation of numerical criteria for toxic substances to protect the Fish and Wildlife Propagation beneficial use

Current through Vol. 41, No. 20, July 1, 2024
Cd(A) and Cd(C)
				  are calculated for each applicable criterion where a pollutant is present at
				  measurable levels in the effluent or where an analytical detection level
				  greater than the established MQL has been utilized. Also see OAC
				  252:740.
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 252:690-3-55 - Wasteload allocations for the implementation of numerical criteria for toxic substances to protect the Fish and Wildlife Propagation beneficial use

Current through Vol. 41, No. 20, July 1, 2024
If a pollutant exhibits reasonable potential, a water
				  quality-based permit limit is required for that pollutant. Background levels
				  used in calculating WLAA and WLAC are described in OAC
				  252:690-3-11
				  through 14. If a pollutant's background level alone exceeds a criterion, the
				  WLA is set equal to that criterion.
(1)
Streams.
The following
				applies to streams:
(A)
WLA
A
.
Where Qe is expressed in cfs, Equation F-1 is
				used to determine WLAA. Where Qe is expressed in mgd, Equation F-2 is
				used.
(B)
WLA
C
.
Depending on the value of Q*, Equation F-3, F-4
				or F-5 is used to determine WLAC.
Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 690 - Water Quality Standards Implementation › Subchapter 3 - Point Source Discharges › Section 252:690-3-56 - Criteria long-term averages for the implementation of numerical criteria for toxic substances to protect the Fish and Wildlife Propagation beneficial use

Current through Vol. 41, No. 20, July 1, 2024
LTAA and LTAC are calculated using a 99% probability basis
				  according to Equations F-8 and F-9, respectively. A CV of 0.6 is assumed unless
				  a CV is determined from effluent data in accordance with
				  252:690-3-7.
				  LTATOX is the more limiting of these two LTAs.
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 252:690-3-57 - Development of permit limitations for the implementation of numerical criteria for toxic substances to protect the Fish and Wildlife Propagation beneficial use

Current through Vol. 41, No. 20, July 1, 2024
MALTOX and DMLTOX are calculated from LTATOX. MALTOX is
				  compared with all applicable criterion MALs. The most stringent MAL and
				  associated DML is used in the permit.
(1)
MAL
TOX
.
MALTOX is calculated using a 95% probability basis according to
				Equation F-10.
(2)
DML
TOX
.
DMLTOX is calculated using a 99% probability
				basis according to Equation F-11.
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 252:690-3-58 - Implementation of dissolved oxygen criteria to protect the Fish and Wildlife Propagation beneficial use

Current through Vol. 41, No. 20, July 1, 2024
Implementation of DO criteria is accomplished through the use
				  of water quality modeling. Modeling of DO is a mathematical representation of
				  the processes that occur within the system that affect instream DO
				  concentration. For implementation of DO criteria, see OAC 252:690-3-58 through
				  3-63.
Added at 19 Ok Reg 1721,
				  eff 6-13-02