| (87) Wetland water quality functions--Attributes of
wetlands that protect and maintain the quality of water in the state,
which include stormwater storage and retention and the moderation
of extreme water level fluctuations; shoreline protection against
erosion through the dissipation of wave energy and water velocity,
and anchoring of sediments; habitat for aquatic life; and removal,
transformation, and retention of nutrients and toxic substances.
(88) Zone of initial dilution--The small area at the
immediate point of a permitted discharge where initial dilution with
receiving waters occurs and that may not meet certain criteria applicable
to the receiving water. A zone of initial dilution is substantially
smaller than a mixing zone.
(b) Abbreviations. The following abbreviations apply
to this chapter:
(1) ALU--aquatic life use.
(2) AP--aquifer protection.
(3) AS--agricultural water supply.
(4) ASTER--Assessment Tools for the Evaluation of Risk.
(5) BAF--Bioaccumulation factor.
(6) BCF--bioconcentration factor.
(7) CASRN--Chemical Abstracts Service Registry number.
(8) CFR--Code of Federal Regulations.
(9) cfs--cubic feet per second.
(10) Cl-1 --chloride.
(11) CR--county road.
(12) DO--dissolved oxygen.
(13) E--exceptional aquatic life use.
(14) EPA--United States Environmental Protection Agency.
(15) degrees F--degrees Fahrenheit.
(16) FM--Farm to Market Road.
(17) ft3 /s--cubic feet
per second.
(18) H--high aquatic life use.
(19) HEAST--Health Effects Assessment Summary Tables.
(20) I--intermediate aquatic life use.
(21) IBWC--International Boundary and Water Commission.
(22) IH--Interstate Highway.
(23) IRIS--Integrated Risk Information System.
(24) IS--industrial water supply.
(25) km--kilometer.
(26) L--limited aquatic life use.
(27) M--minimal aquatic life use.
(28) m--multiplier.
(29) m/km--meters per kilometer.
(30) MCL--maximum contaminant level (for public drinking
water supplies).
(31) MDL--method detection limit.
(32) mg/L--milligrams per liter.
(33) mi--mile.
(34) mL--milliliter.
(35) MUD--municipal utility district.
(36) N--navigation.
(37) NCR--noncontact recreation.
(38) O--oyster waters.
(39) PCR--primary contact recreation.
(40) PS--public water supply.
(41) RfD--reference dose.
(42) RR--ranch road.
(43) 7Q2--seven-day, two-year low-flow.
(44) SCR--secondary contact recreation.
(45) SH--state highway.
(46) SO4 -2 --sulfate.
(47) SU--standard units.
(48) TCEQ--Texas Commission on Environmental Quality.
(49) TDS--total dissolved solids.
(50) TEF--toxic equivalency factor.
(51) TMDL--total maximum daily load.
(52) TPDES--Texas Pollutant Discharge Elimination System.
(53) TRE--toxicity reduction evaluation.
(54) TSS--total suspended solids.
(55) US--United States.
(56) USFDA--United States Food and Drug Administration.
(57) USGS--United States Geological Survey.
(58) WER--Water-effect ratio.
(59) WF--waterfowl habitat.
(60) WQM--water quality management.
(61) µg/L--micrograms per liter.
(62) ZID--zone of initial dilution.
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| Source Note: The provisions of this §307.3 adopted to be effective July 10, 1991, 16 TexReg 3400; amended to be effective July 13, 1995, 20 TexReg 4701; amended to be effective August 17, 2000, 25 TexReg 7722; amended to be effective July 22, 2010, 35 TexReg 6294; amended to be effective March 6, 2014, 39 TexReg 1450; amended to be effective March 1, 2018, 43 TexReg 1102; amended to be effective September 29, 2022, 47 TexReg 6216 |
