Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 302 - WATER QUALITY STANDARDS › Subpart E - LAKE MICHIGAN BASIN WATER QUALITY STANDARDS › Section 302.501 - Scope, Applicability, and Definitions

Current through Register Vol. 48, No. 28, July 12, 2024
a) Subpart E contains the Lake Michigan Basin
				water quality standards. These must be met in the waters of the Lake Michigan
				Basin as designated in 35 Ill. Adm. Code
				303.443.
b) In addition to the definitions provided at
				35 Ill. Adm. Code 301.200 through
				301.444, and in place of
				conflicting definitions at Section
				302.100, the following terms
				have the meanings specified for the Lake Michigan Basin:
"Acceptable daily exposure" or "ADE" means an estimate of the
				  maximum daily dose of a substance that is not expected to result in adverse
				  noncancerous effects to the general human population, including sensitive
				  subgroups.
"Acceptable endpoints", for the purpose of deriving wildlife
				  criteria, means acceptable subchronic and chronic endpoints that affect
				  reproductive or developmental success, organismal viability or growth, or any
				  other endpoint that is, or is directly related to, parameters that influence
				  population dynamics.
"Acute to chronic ratio" or "ACR" is the standard measure of
				  the acute toxicity of a material divided by an appropriate measure of the
				  chronic toxicity of the same material under comparable conditions.
"Acute toxicity" means adverse effects that result from an
				  exposure period that is a small portion of the life span of the
				  organism.
"Adverse effect" means any deleterious effect to organisms
				  due to exposure to a substance. This includes effects that are or may become
				  debilitating, harmful, or toxic to the normal functions of the organism, but
				  does not include non-harmful effects such as tissue discoloration alone or the
				  induction of enzymes involved in the metabolism of the substance.
"Baseline BAF" for organic chemicals, means a bioaccumulation
				  factor (BAF) that is based on the concentration of a freely dissolved chemical
				  in the ambient water and takes into account the partitioning of the chemical
				  within the organism; for inorganic chemicals, a BAF is based on the wet weight
				  of the tissue.
"Baseline BCF" for organic chemicals, means a
				  bioconcentration factor (BCF) that is based on the concentration of a freely
				  dissolved chemical in the ambient water and takes into account the partitioning
				  of the chemical within the organism; for inorganic chemicals, a BCF is based on
				  the wet weight of the tissue.
"Bioaccumulative chemical of concern" or "BCC" is any
				  chemical that has the potential to cause adverse effects and that, upon
				  entering the surface waters, by itself or as its toxic transformation product,
				  accumulates in aquatic organisms by a human health bioaccumulation factor
				  greater than 1,000, after considering metabolism and other physiochemical
				  properties that might enhance or inhibit bioaccumulation based on the
				  methodology in Section
				  302.570. In addition, the
				  half-life of the chemical in the water column, sediment, or biota must be
				  greater than eight weeks. BCCs include the following substances:
Chlordane
4,4'-DDD; p,p'-DDD; 4,4'-TDE; p,p'-TDE
4,4'-DDE; p,p'-DDE
4,4'-DDT; p,p'-DDT
Dieldrin
Hexachlorobenzene
Hexachlorobutadiene; Hexachloro-1,3-butadiene
Hexachlorocyclohexanes; BHCs
alpha-Hexachlorocyclohexane; alpha-BHC
beta-Hexachlorocyclohexane; beta-BHC
delta-Hexachlorocyclohexane; delta-BHC
Lindane; gamma-Hexachlorocyclohexane; gamma-BHC
Mercury
Mirex
Octachlorostyrene
PCBs; polychlorinated biphenyls
Pentachlorobenzene
Photomirex
2,3,7,8-TCDD; Dioxin
1,2,3,4-Tetrachlorobenzene
1,2,4,5-Tetrachlorobenzene
Toxaphene
"Bioaccumulation" is the net accumulation of a substance by
				  an organism as a result of uptake from all environmental sources.
"Bioaccumulation factor" or "BAF" is the ratio (in L/kg) of a
				  substance's concentration in the tissue of an aquatic organism to its
				  concentration in the ambient water, in situations where both the organism and
				  its food are exposed and the ratio does not change substantially over
				  time.
"Bioconcentration" means the net accumulation of a substance
				  by an aquatic organism as a result of uptake directly from the ambient water
				  through gill membranes or other external body surfaces.
"Bioconcentration Factor" or "BCF" is the ratio (in L/kg) of
				  a substance's concentration in the tissue of an aquatic organism to its
				  concentration in the ambient water, in situations where the organism is exposed
				  through the water only and the ratio does not change substantially over
				  time.
"Biota-sediment accumulation factor" or "BSAF" means the
				  ratio (in kg of organic carbon/kg of lipid) of a substance's lipid-normalized
				  concentration in the tissue of an aquatic organism to its organic
				  carbon-normalized concentration in surface sediment, in situations where the
				  ratio does not change substantially over time, both the organism and its food
				  are exposed, and the surface sediment is representative of average surface
				  sediment in the vicinity of the organism.
"Carcinogen" means a substance that causes an increased
				  incidence of benign or malignant neoplasms, or substantially decreases the time
				  to develop neoplasms, in animals or humans. The classification of carcinogens
				  is determined by the procedures in Section II.A of Appendix C to
				  40 CFR
				  132, incorporated by reference in 35 Ill.
				  Adm. Code 301.106.
"Chronic effect" means an adverse effect that is measured by
				  assessing an acceptable endpoint, and results from continual exposure over
				  several generations, or at least over a significant part of the test species'
				  projected life span or life stage.
"Chronic toxicity" means adverse effects that result from an
				  exposure period that is a large portion of the life span of the
				  organism.
"Dissolved organic carbon" or "DOC" means organic carbon that
				  passes through a 1 µm pore size filter.
"Dissolved metal" means the concentration of a metal that
				  will pass through a 0.45
										µm pore size
				  filter.
"Food chain" means the energy stored by plants is passed
				  along through the ecosystem through trophic levels in a series of steps of
				  eating and being eaten, also known as a food web.
"Food chain multiplier" or "FCM" means the ratio of a BAF to
				  an appropriate BCF.
"Linearized multi-stage model" means a mathematical model for
				  cancer risk assessment. This model fits linear dose-response curves to low
				  doses. It is consistent with a no-threshold model of carcinogenesis.
"Lowest observed adverse effect level" or "LOAEL" means the
				  lowest tested dose or concentration of a substance that results in an observed
				  adverse effect in exposed test organisms when all higher doses or
				  concentrations result in the same or more severe effects.
"No observed adverse effect level" or "NOAEL" means the
				  highest tested dose or concentration of a substance that results in no observed
				  adverse effect in exposed test organisms where higher doses or concentrations
				  result in an adverse effect.
"Octanol-water partition coefficient" or "Kow" is the ratio
				  of the concentration of a substance in the n-octanol phase to its concentration
				  in the aqueous phase in an equilibrated two-phase octanol-water system. For log
				  Kow, the log of the octanol-water partition coefficient is a base 10
				  logarithm.
"Open Waters of Lake Michigan" means all of the waters within
				  Lake Michigan in Illinois jurisdiction lakeward from a line drawn across the
				  mouth of tributaries to Lake Michigan, but not including waters enclosed by
				  constructed breakwaters.
"Particulate organic carbon" or "POC" means organic carbon
				  that is retained by a 1 µm pore size filter.
"Relative source contribution" or "RSC" means the percentage
				  of total exposure that can be attributed to surface water through water intake
				  and fish consumption.
"Resident or indigenous species" means species that currently
				  live a substantial portion of their life cycle or reproduce in a given body of
				  water or that are native species whose historical range includes a given body
				  of water.
"Risk associated dose" or "RAD" means a dose of a known or
				  presumed carcinogenic substance in mg/kg/day that, over a lifetime of exposure,
				  is estimated to be associated with a plausible upper bound incremental cancer
				  risk equal to one in 100,000.
"Slope factor" or "q1*" is the
				  incremental rate of cancer development calculated by a linearized multistage
				  model or another appropriate model. It is expressed in mg/kg/day of exposure to
				  the chemical in question.
"Standard Methods" means "Standard Methods for the
				  Examination of Water and Wastewater", available from the American Public Health
				  Association.
"Subchronic effect" means an adverse effect, measured by
				  assessing an acceptable endpoint, resulting from continual exposure for a
				  period of time less than that deemed necessary for a chronic test.
"Target species" is a species to be protected by the
				  criterion.
"Target species value" is the criterion value for the target
				  species.
"Test species" is a species that has test data available to
				  derive a criterion.
"Test dose" or "TD" is a LOAEL or NOAEL for the test
				  species.
"Tier I criteria" are numeric values derived by use of the
				  Tier I methodologies that either have been adopted as numeric criteria into a
				  water quality standard or are used to implement narrative water quality
				  criteria.
"Tier II values" are numeric values derived by use of the
				  Tier II methodologies that are used to implement narrative water quality
				  criteria. They are applied as criteria, have the same effect, and are subject
				  to the same appeal rights as criteria.
"Trophic level" means a functional classification of taxa
				  within a community that is based on feeding relationships. For example, aquatic
				  green plants and herbivores comprise the first and second trophic levels in a
				  food chain.
"Toxic unit acute" or "TUa" is the
				  reciprocal of the effluent concentration that causes 50 percent of the test
				  organisms to die by the end of the acute exposure period, which is 48 hours for
				  invertebrates and 96 hours for vertebrates.
"Toxic unit chronic" or "TUc" is the
				  reciprocal of the effluent concentration that causes no observable effect on
				  the test organisms by the end of the chronic exposure period, which is at least
				  seven days for Ceriodaphnia, fathead minnow, and rainbow trout.
"Uncertainty factor" or "UF" is one of several numeric
				  factors used in deriving criteria from experimental data to account for the
				  quality or quantity of the available data.
"USEPA" means the United States Environmental Protection
				  Agency.