Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 690 - Water Quality Standards Implementation › Subchapter 1 - Introduction › Section 252:690-1-3 - Technical Acronyms

Current through Vol. 41, No. 20, July 1, 2024
The following technical acronyms, when used in this Chapter,
				  shall have the following meaning:
" [DELTA] Tmax"
means the
				  maximum temperature increase in °C at the edge of the temperature mixing
				  zone.
"7Q2"
means the 7-day low flow of a stream
				  likely to occur with a 50% probability each year. The procedure for determining
				  a site-specific 7Q2 is described at OAC 252:740.
"7T2"
means the 7-day maximum temperature likely
				  to occur with a 50% probability each year. The procedure for determining a
				  site-specific 7T2 is described at OAC 252:740.
"ACD"
means acute critical dilution.
"BOD5"
means 5-day
				  biochemical oxygen demand.
"BT/C ratio"
means the ratio of trigger
				  background concentration to associated water quality criterion.
"(BT/C)max"
means the
				  maximum BT/C ratio for a given criterion for which background monitoring is
				  required as a permit condition.
"C95"
means the
				  95th percentile maximum likelihood effluent
				  concentration of a substance. It is the product of
				  CE(mean) and RPF95.
"C95(M)
means the
				  95th percentile maximum likelihood effluent
				  concentration of a substance, accounting for the size of the effluent data set.
				  It is the product of CE(max) and
				  RPF95(M).
"CA"
means the acute
				  numerical criterion for toxic substances.
"CB"
means background
				  concentration.
"CC"
means the chronic
				  numerical criterion for toxic substances.
"Cd"
means the instream
				  concentration of a substance resulting from a wastewater discharge.
"Cd(A)"
means the
				  instream concentration of a substance as determined by the acute mixing
				  equation.
"Cd(c)"
means the maximum
				  instream concentration of a substance at the edge of the chronic mixing
				  zone.
"Cd(FF)"
means the
				  instream concentration of a substance after complete mixing, as applied to
				  determination of reasonable potential to exceed a human health criterion for
				  the consumption of fish flesh.
"Cd(FFW)"
means the
				  instream concentration of a substance after complete mixing, as applied to
				  determination of reasonable potential to exceed a human health criterion for
				  the consumption of fish flesh and water.
"Cd(NRWQC)"
means the
				  instream concentration of a substance after complete mixing, as applied to
				  determination of reasonable potential to exceed an EPA human health criterion
				  for the consumption of fish flesh.
"Cd(RAW)"
means the
				  instream concentration of a substance after complete mixing, as applied to
				  determination of reasonable potential to exceed a raw water column
				  criterion.
"Cd(SS)"
means the
				  instream concentration of a substance after complete mixing, as applied to
				  determination of reasonable potential to exceed an agriculture sample standard
				  (SS).
"Cd(YMS)"
means the
				  instream concentration of a substance after complete mixing, as applied to
				  determination of reasonable potential to exceed an agriculture yearly mean
				  standard (YMS).
"CE(max)"
means the
				  maximum concentration of a substance in an effluent data set.
"CE(mean)"
means mean
				  effluent concentration.
"CFF"
means the numerical
				  criterion for the protection of human health for the consumption of fish
				  flesh.
"CFFW"
means the
				  numerical criterion for the protection of human health for the consumption of
				  fish flesh and water.
"CNRWQC"
means the EPA
				  recommended national water quality criterion for the protection of human health
				  for the consumption of fish flesh.
"CRAW"
means the
				  numerical criterion for protection of the raw water column.
"CSS"
means agriculture
				  sample standard numerical criterion, i.e., the historic segment averaged SS
				  value from Appendix F of OAC 252:730, unless data more representative of the
				  receiving stream are available.
"CYMS"
means agriculture
				  yearly mean standard numerical criterion, i.e., the historic segment averaged
				  YMS value from Appendix F of OAC 252:730, unless data more representative of
				  the receiving stream are available.
"CBOD5"
means 5-day
				  carbonaceous biochemical oxygen demand.
"CCD"
means chronic critical dilution.
"CPP"
means the Continuing Planning Process
				  document required under Section 303(e) of the Clean Water Act.
"CWAC"
means cool water aquatic
				  community.
"D"
means, in the context of a discharge to a
				  lake through a pipe, the pipe diameter in feet.
"DML"
means daily maximum permit
				  limitation.
"DMLA"
means the toxic
				  substance acute criterion DML.
"DMLC"
means the toxic
				  substance chronic criterion DML.
"DMLCL"
means agriculture
				  criterion-based DML for chlorides.
"DMLFF"
means the human
				  health/fish flesh DML.
"DMLFFW"
means the human
				  health/fish flesh and water DML.
"DMLHH"
means human
				  health-based DML.
"DMLRAW"
means the raw
				  water column DML.
"DMLSO4"
means
				  agriculture criterion-based DML for sulfates.
"DMLT"
means the
				  temperature based DML.
"DMLTDS"
means
				  agriculture criterion-based DML for total dissolved solids (dried at
				  180°C).
"DMLTOX"
means toxic
				  substance-based DML.
"DMR"
means Discharge Monitoring Report.
"DO"
means dissolved oxygen.
"gpd"
means gallons per day.
"HLAC"
means habitat-limited aquatic
				  community.
"ICIS"
means integrated compliance information
				  system.
"LTA"
means long-term average.
"LTA"
means long-term average.
"LTA"
means long-term average.
"LTAC"
means the toxic
				  substance chronic numerical criterion LTA.
"LTAFF"
means the fish
				  flesh human health criterion LTA.
"LTAFFW"
means the fish
				  flesh and water human health criterion LTA.
"LTARAW"
means the raw
				  water column criterion LTA.
"LTASS"
means the
				  agriculture sample standard LTA.
"LTAT"
means the
				  temperature criterion LTA.
"LTATOX"
means the
				  limiting toxic substance-based LTA, i.e., the smallest of
				  LTAA or LTAC, as
				  applicable.
"LTAYMS"
means the
				  agriculture yearly mean standard LTA.
"MAL"
means monthly average permit
				  limitation.
"MALA"
means the toxic
				  substance acute criterion MAL.
"MALC"
means the toxic
				  substance chronic criterion MAL.
"MALCL"
means agriculture
				  criterion-based MAL for chlorides.
"MALFF"
means the human
				  health/fish flesh MAL.
"MALFFW"
means the human
				  health/fish flesh and water MAL.
"MALRAW"
means the raw
				  water column MAL.
"MCL"
means maximum contaminant level (when used
				  in the context of primary drinking water standards).
"MALHH"
means human
				  health-based MAL.
"MALSO4"
means
				  agriculture criterion-based MAL for sulfates.
"MALT"
means temperature
				  MAL.
"MALTDS"
means
				  agriculture criterion-based MAL for total dissolved solids (dried at
				  180°C).
"MALTOX"
means toxic
				  substance-based MAL.
"mgd"
means million gallons per day.
"mg/l"
means milligrams per liter.
"MQL"
means minimum quantifiable level.
"N"
means the number of individual data points,
				  collected over time, in an effluent or background data set.
"Nm"
means the per month
				  monitoring frequency where a permit limitation is established. When used in the
				  context of temperature limitations, Nm is equal to four
				  times Nw (i.e., Nm = 4 x
				  Nw).
"Nw"
means the per week
				  monitoring frequency where a temperature permit limitation is
				  established.
"NRWQC"
means the National Recommended Water
				  Quality Criteria, publication no. EPA 822-Z-99-001, April 1999.
"PBCR"
means Primary Body Contact
				  Recreation.
"Q*"
means the ratio of the regulatory effluent
				  flow to the regulatory receiving water flow.
"Qe"
means regulatory
				  effluent flow.
"Qe(30)"
means the
				  Qe that is the highest monthly average flow over the two
				  year period of record for an industrial facility.
"Qe(D)"
means the
				  Qe that is the lesser of the design flow for a municipal
				  POTW or the design flow listed in the Section 208 Areawide Basin Plan.
"Qe(LTA)"
means the
				  Qe that is the arithmetic (long term) average flow over
				  the two year period of record for an industrial facility.
"Qu"
means regulatory
				  receiving water flow upstream of a point of wastewater discharge.
"Qu(7Q2)"
means the same
				  as 7Q2.
"Qu(LTA)"
means the
				  Qu that is the mean annual (long term) receiving water
				  flow.
"Qu(STA)"
means the
				  Qu that is the short term average receiving water flow
				  and is equal to Qu(LTA) x 0.68.
"SBCR"
means Secondary Body Contact
				  Recreation
"SNC"
means significant noncompliance.
"SS"
means sample standard.
"s.u."
means standard units for the measurement
				  of pH.
"T95"
means
				  95th percentile effluent temperature in
				  °C.
"Ta"
means regulatory
				  ambient temperature in °C.
"TBLL"
means technically based local
				  limits
"TDS"
means total dissolved solids.
"TIE"
means toxicity identification
				  evaluation.
"TMDL"
means total maximum daily load.
"TRC"
means total residual chlorine.
"TRE"
means toxicity reduction
				  evaluation.
"TRO"
means total residual (halogenated)
				  oxidants.
"µg/l"
means micrograms per liter.
"W"
means, in the context of a discharge to a
				  lake through an open channel (i.e., canal), the channel width in feet.
"WAL"
means weekly average permit
				  limitation.
"WALT"
means temperature
				  WAL.
"WET"
means whole effluent toxicity.
"WLA"
means waste load allocation.
"WLAA"
means a toxic
				  substance acute criterion WLA.
"WLAC"
means a toxic
				  substance chronic criterion WLA.
"WLAFF"
means a human
				  health/fish flesh criterion WLA.
"WLAFFW"
means a human
				  health/fish flesh and water criterion WLA.
"WLARAW"
means a raw
				  water column criterion WLA.
"WLASS"
means an
				  agriculture sample standard WLA.
"WLAT"
means a
				  temperature criterion WLA.
"WLAYMS"
means an
				  agriculture yearly mean standard WLA.
"WQMP"
means the statewide Section 208 Water
				  Quality Management Plan.
"WWAC"
means warm water aquatic
				  community.
"YMS"
means yearly mean standard.
Added at 19 Ok Reg 1721,
				  eff 6-13-02; Amended at 24 Ok Reg 1542, eff 6-15-07; Amended at 27 Ok Reg 2167,
				  eff 7-11-10; Amended at 28 Ok Reg 1316, eff
				  7-1-11