Agricultural Chemical. Any
pesticide, nutrient or fertilizer used for the benefit of agricultural production
or pest management. (7-1-21)T
Aquifer. A geological unit of permeable saturated material capable
of yielding economically significant quantities of water to wells and springs.
Uses. Various uses of ground water in Idaho including, but not limited to,
domestic water supplies, industrial water supplies, agricultural water supplies,
aquacultural water supplies, and mining. A beneficial use is defined as actual
current or projected future uses of ground water. (7-1-21)T
Best Available Method. Any
system, process, or method which is available to the public for commercial or
private use to minimize the impact of point or nonpoint sources of contamination
on ground water quality. (7-1-21)T
Best Management Practice. A
practice or combination of practices determined to be the most effective and
practical means of preventing or reducing contamination to ground water and
interconnected surface water from nonpoint and point sources to achieve water
quality goals and protect the beneficial uses of the water. (7-1-21)T
Best Practical Method. Any
system, process, or method that is established and in routine use which could be
used to minimize the impact of point or nonpoint sources of contamination on
ground water quality. (7-1-21)T
Board. The Idaho Board of Environmental Quality. (7-1-21)T
Cleanup. The removal,
treatment or isolation of a contaminant from ground water through the directed
efforts of humans or the removal or treatment of a contaminant in ground water
through management practice or the construction of barriers, trenches and other
similar facilities for prevention of contamination, as well as the use of natural
processes such as ground water recharge, natural decay and chemical or biological
Constituent. Any chemical, ion, radionuclide, synthetic organic
compound, microorganism, waste or other substance occurring in ground water.
Contaminant. Any chemical, ion, radionuclide, synthetic organic
compound, microorganism, waste or other substance which does not occur naturally
in ground water or which naturally occurs at a lower concentration.
Contamination. The direct or indirect introduction into ground water
of any contaminant caused in whole or in part by human activities.
Zone. The zone that extends from the surface of the soil to the depth of
the deepest crop root and is specific to a species of plant, group of plants, or
Degradation. The lowering of ground water quality as measured in a
statistically significant and reproducible manner. (7-1-21)T
Department. The Department of
Environmental Quality. (7-1-21)T
Extraction. Physical removal of ore or waste rock from
mineral-bearing deposits. Extraction does not include processing, which is the
removal of target minerals from ores by physical or chemical methods.
Water. Any water of the state which occurs beneath the surface of the
earth in a saturated geological formation of rock or soil. (7-1-21)T
Ground Water Quality Standard.
Values, either numeric or narrative, assigned to any constituent for the purpose
of establishing minimum levels of protection. (7-1-21)T
Highly Vulnerable Ground
Water. Ground water characterized by a relatively high potential for
contaminants to enter and/or be transported within the flow system.
Determinations of ground water vulnerability will include consideration of land
use practices and aquifer characteristics. (7-1-21)T
Irreplaceable Source. A ground
water source serving a beneficial use(s) where the reliable delivery of
comparable quality and quantity of water from an alternative source in the region
would be economically infeasible or precluded by institutional constraints.
Operator. Any person authorized to engage in mining activities, including
without limitation those authorized by law, lease, contract, permit, or plan of
operation. It does not include a governmental agency that grants mineral leases
or similar contracts or permits unless the agency is engaged in mining
Mining Activity. Recovery of a mineral from mineral-bearing
deposits, which includes reclamation, extraction, excavation, overburden
placement, disposal of tailings resulting from processing, and disposal of
mineral extraction wastes, including tailings that are the result of extraction,
waste rock, and other extraction wastes uniquely associated with mining.
. The area on or within which one (1) or more mining activities occur.
The Department shall determine the boundaries of the mining area as provided in
Distinct mining activities may constitute separate mining areas.
Background Level. The level of any constituent in the ground water within
a specified area as determined by representative measurements of the ground water
quality unaffected by human activities. (7-1-21)T
Person. Any individual,
association, partnership, firm, joint stock company, joint venture, trust,
estate, political subdivision, public or private corporation, state or federal
governmental department, agency or instrumentality, or any legal entity which is
recognized by law as the subject of rights and duties. (7-1-21)T
Point of Compliance
vertical surface where the Department determines compliance with ground water
quality standards as provided in Subsection 400.05 and Section
Quantitation Level. The lowest concentration of a constituent that can be
reliably quantified among laboratories within specified limits of precision and
accuracy during routine laboratory operating conditions. Specified limits of
precision and accuracy are the criteria listed in the calibration specifications
or quality control specifications of an analytical method. (7-1-21)T
Projected Future Beneficial
Uses. Various uses of ground water, such as drinking water, aquaculture,
industrial, mining or agriculture, that are practical and achievable in the
future based on hydrogeologic conditions, water quality, future land use
activities and social/economic considerations. (7-1-21)T
Recharge Area. An area in
which water infiltrates into the soil or geological formation from, including but
not limited to precipitation, irrigation practices and seepage from creeks,
streams, and lakes, and percolates to one (1) or more aquifers.
Reclamation. The process of restoring an area affected by a mining
activity to its original or another beneficial use, considering previous uses,
possible future uses, and surrounding topography. The objective is to
re-establish a diverse, self-perpetuating plant community, and to minimize
erosion, remove hazards, and maintain water quality. (7-1-21)T
Remediation. Any action taken
(1) to control the source of contamination, (2) to reduce the level of
contamination, (3) to mitigate the effects of contaminants, and/or (4) to
minimize contaminant movement. Remediation includes providing alternate drinking
water sources when needed. (7-1-21)T
Site Background Level. The
ground water quality at the hydraulically upgradient site boundary.