020-8 Wyo. Code R. §§ 8-2 - Definitions
The following definitions supplement those definitions contained in Section 35-11-103 of the Wyoming Environmental Quality Act.
(a) "Aquifer" means a zone, stratum or group
of strata that can store and transmit water in sufficient quantities for a
specific use.
(b) "Background"
means the constituents or parameters and the concentrations or measurements
that describe water quality and water quality variability prior to a subsurface
discharge.
(c) "Below-Surface
Receiver (Receiver)" means any zone, interval, formation or unit in the
subsurface that can accept water or fluid from other sources.
(d) "Domestic Water" means a water that is
suitable for uses, including but not limited to, drinking, gardening and other
household uses, municipal uses and farmstead uses, including water used in the
washing or hydro-cooling of farm products destined for human consumption on the
farm, for sale on the fresh food market or for delivery to a processing plant
for canning, freezing or other type of preparation prior to marketing.
Classification of Domestic water does not mean that it meets the national
drinking water standards.
(e)
"Fluid" means any material that flows or moves whether semisolid liquid,
sludge, gas or any other form or state.
(f) "Groundwater" means subsurface water that
fills available openings in rock or soil materials such that they may be
considered water saturated under hydrostatic pressure.
(g) "Groundwaters of the State" are all
bodies of underground water that are wholly or partially within the boundaries
of the State; Groundwaters of the State is synonymous with Groundwaters of
Wyoming.
(h) "Hazardous Material
(Substance)" means any matter of any description including petroleum related
products and radioactive material (substance) that, when discharged into any
waters of the State presents an imminent and substantial hazard to public
health or welfare and shall include all materials (substances) so designated by
the U.S. Environmental Protection Agency in the Federal Register for March 13,
1978 (Part III), Water Programs, Hazardous Substances.
(i) "Milliequivalents Per Liter," abbreviated
meq/L, used to report the Residual Sodium Carbonate concentration in water used
for irrigation, is defined as 0.001 of the equivalent weight of the ion per
liter volume.
(j) "Milligrams Per
Liter," abbreviated mg/L, means milligrams of solute per liter of solution --
equivalent to parts per million assuming unit density of water.
(k) "Parameter" means one of a set of
physical or chemical properties whose measured values determine the
characteristics of a fluid.
(l)
"pH" is a term to express the intensity of the acid or basic condition. A pH
value of 7.0 at 25 degrees Celsius (C) is neutral, with pH's of less than 7.0
progressively more acid and pH's of greater than 7.0 progressively more
basic.
(m) "Picocuries Per Liter,"
abbreviated pCi/L, is a measure of radioactivity of waters or fluids. A
picocurie is equal to 10-12 curie; a curie is defined as 3.7 x 1010
disintegrations per second.
(n)
"Residual Sodium Carbonate", abbreviated RSC, is defined as twice the
concentration of carbonate or bicarbonate a water would contain after
subtracting an amount equivalent to the calcium plus the magnesium, and is a
measure of potential hazard that exists when waters high in carbonate and
bicarbonate and relatively low in calcium and magnesium are used for
irrigation.
(o) "Sodium Adsorption
Ratio", abbreviated SAR, of a water is defined by the U.S. Department of
Agriculture Laboratory (1954) as: where ion concentrations are expressed in
meq/L. The SAR predicts reasonably well the degree to which irrigation water
tends to enter into cation-exchange reactions in soil.
(p) "Standard Unit", abbreviated s.u., is the
unit of measurement used to describe the numerical pH of a solution, fluid or
pollutant.
(q) "Subsurface
Discharge" means a discharge to a below-surface receiver.
(r) "Total Dissolved Solids," abbreviated
TDS, is the sum of the dissolved mineral constituents in water, expressed as
mg/L.
(s) "Toxic Materials
(Substances)" are those materials (substances) or combinations of materials
(substances), including disease-causing agents, that, after discharge and upon
exposure, ingestion, inhalation or assimilation into any environmentally
significant organism, either directly from the environment or indirectly by
ingestion through food chains, may cause death, disease, behavioral
abnormalities, cancer, genetic malfunctions, physiological malfunctions
(including malfunctions in reproduction of offspring) or physical deformations
in such organisms or their offspring; and includes all materials (substances)
so designated as toxic by the U.S. Environmental Protection Agency in the
Federal Register for December 24, 1975 (Part IV), Water Programs, National
Interim Primary Drinking Water Regulations.
(t) "Underground Water" means subsurface
water that is any body of water under the surface of the earth, including water
in the vadose zone and groundwater.
(u) "Vadose Zone" means the unsaturated zone
in the earth, between the land surface and the top of the first saturated
aquifer that is not a perched water aquifer. The vadose zone characteristically
contains liquid water under less than atmospheric pressure, and water vapor and
air or other gases at atmospheric pressure. Perched water bodies exist within
the vadose zone.
(v) "Virtually
Free" means a concentration less than the concentration that is the lower limit
of detection.
Notes
State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison features will be added as we have more versions to compare.
No prior version found.