Idaho Administrative Code › Title IDAPA 58 - Environmental Quality, Department of › Rule 58.01.02 - WATER QUALITY STANDARDS › Section 58.01.02.287 - SITE-SPECIFIC AQUATIC LIFE CRITERIA FOR SELENIUM

Current through August 31, 2023
Site-specific water column values (30-day average) are based on
				dissolved total selenium in water and are derived using a performance-based
				approach from fish tissue values via either the mechanistic modeling or
				empirical bioaccumulation factor (BAF) method in Aquatic Life Ambient Water
				Quality Criterion for Selenium - Freshwater, EPA-822-R-16-006, Appendix K:
				Translation of a Selenium Fish Tissue Criterion Element to a Site-Specific
				Water Column Value (June 2016). (3-31-22)
01.
Subsection of Blackfoot
			 Subbasin
. Blackfoot River - confluence of Lanes and Diamond Creeks to
			 Blackfoot Reservoir (unit US-10), and all tributaries thereof. Site-specific
			 egg-ovary, whole-body, and muscle criterion elements for these water bodies are
			 set out in the following table. The lentic and short-term exposure water column
			 criterion elements set out in Subsection
			 210.01., table footnote
l.
, are also applicable to the water bodies identified in this
			 subsection.
Chronic
Egg-Ovary (mg/kg dw)
Fish Tissue (mg/kg dw)
Water Column (µg/L)
Egg-Ovary
Whole-Body
Muscle
Water Lotic
24.51
12.52
12.82
11.93,4,5
mg/kg dw - milligrams per kilogram dry weight,
							 µg/L - micrograms per liter
1. Egg-ovary supersedes any whole-body, muscle, or
							 water column element when fish egg-ovary concentrations are measured. Single
							 measurement of an average or composite sample of at least five (5) individuals
							 of the same species. Not to be exceeded; DEQ will evaluate all representative
							 egg-ovary data to determine compliance with this criterion element.
2. Fish whole-body or muscle tissue supersedes water
							 column element when both fish tissue and water concen-trations are measured.
							 Single measurement of an average or composite sample of at least five (5)
							 individuals of the same species where the smallest individual is no less than
							 seventy-five percent (75%) of the total length (size) of the largest
							 individual. Not to be exceeded; DEQ will evaluate all representative whole-body
							 or muscle data to determine compliance with this criterion element.
3. Water column values are derived using the
							 empirical BAF method. For comparative purposes only, the exam-ple value
							 displayed in this table represents the lotic water column value for Sheep Creek
							 based on the average BAF for Cutthroat Trout among all sampling locations and
							 years.
4. Lotic Water Column Equation=
Click here to view
							 image
where Tissue criterion is the fish tissue element
							 (whole-body), and BAF is the bioaccumulation factor derived by dividing
							 site-specific field-collected samples of fish tissue (whole-body) by
							 site-specific field-collected samples of water.
5. Water column values are the applicable criterion
							 element in the absence of steady-state condition fish tissue data. In fishless
							 waters, surface water from the fishless waters and fish tissue from the nearest
							 downstream waters are used for bioaccumulation modeling. Fish tissue supersedes
							 any site-specific water column values when fish are sampled downstream of
							 fishless waters.
(3-31-22)
02.
Subsection of Bear Lake
			 Subbasin
. Georgetown Creek - source to mouth (unit B-22), and all
			 tributaries thereof. Site-specific egg-ovary, whole-body, and muscle criterion
			 elements for these water bodies are set out in the following table. The lentic
			 and short-term water column criterion elements set out in Subsection
			 210.01., table footnote
l.
, are also applicable to the water bodies identified in this
			 subsection.
Chronic
Egg-Ovary (mg/kg
							 dw)
Fish Tissue (mg/kg
							 dw)
Water Column
							 (µg/L)
Egg-Ovary
Whole-Body
Muscle
Water Lotic
21.01
12.52
12.82
3.83,4,5
mg/kg dw - milligrams per kilogram dry weight,
							 µg/L - micrograms per liter
1. Egg-ovary supersedes any whole-body, muscle, or
							 water column element when fish egg-ovary concentrations are measured. Single
							 measurement of an average or composite sample of at least five (5) individuals
							 of the same species. Not to be exceeded; DEQ will evaluate all representative
							 egg-ovary data to determine compliance with this criterion element.
2. Fish whole-body or muscle tissue supersedes water
							 column element when both fish tissue and water concen-trations are measured.
							 Single measurement of an average or composite sample of at least five (5)
							 individuals of the same species where the smallest individual is no less than
							 seventy-five percent (75%) of the total length (size) of the largest
							 individual. Not to be exceeded; DEQ will evaluate all representative whole-body
							 and muscle data to determine compliance with this criterion element.
3. Water column values are derived using the
							 empirical BAF method. For comparative purposes only, the exam-ple displayed in
							 this table represents the lotic water column value for Georgetown Creek,
							 upstream of the intermittent reach, based on the average BAF for Brook Trout in
							 all sampling locations and years.
4. Lotic Water Column Equation=
Click here to view
							 image
where Tissue criterion is the fish tissue element
							 (whole-body), and BAF is the bioaccumulation factor derived by dividing
							 site-specific field-collected samples of fish tissue (whole-body) by
							 site-specific field-collected samples of water.
5. Water column values are the applicable criterion
							 element in the absence of steady-state condition fish tissue data. In fishless
							 waters, surface water from the fishless waters and fish tissue from the nearest
							 downstream waters are used for bioaccumulation modeling. Fish tissue supersedes
							 any site-specific water column values when fish are sampled downstream of
							 fishless waters.
(3-31-22)
03.
Subsection of Salt Subbasin - Sage
			 Creek
. Sage Creek - source to mouth (unit US-9) including, Hoopes Spring
			 channel downstream of the spring complex, South Fork Sage Creek downstream of
			 the spring complex, Sage Creek downstream of the confluence of Hoopes Spring
			 with Sage Creek to its confluence with Crow Creek, and tributaries; excluding
			 North Fork Sage Creek, Pole Canyon Creek, and their tributaries. Site-specific
			 eggovary and whole-body criterion elements for these water bodies are set out
			 in the following table. The muscle, lentic water column, and short-term water
			 column criterion elements set out in Subsection
			 210.01., table footnote
l.
, are also applicable to the water bodies identified in this
			 subsection.
Chronic
Egg-Ovary (mg/kg
							 dw)
Fish Tissue (mg/l<g
							 dw)
Water Column
							 (|jg/L)
Egg-Ovary
Whole-Body
Water Lotic
20.51
13.62
16.73
mg/kg dw- milligrams per kilogram dry weight,
							 µg/L- micrograms per liter
1 Egg-ovary supersedes any whole-body muscle, or
							 water column element when fish egg-ovary concentrations are measured Single
							 measurement of an average or composite sample of at least five (5) individuals
							 of the same species Not to be exceeded, DEQ will evaluate all representative
							 egg-ovary data to determine compliance with this cnterion element.
2. Fish tissue supersedes water column element when
							 both fish tissue (whole-body) and water concentrations are measured Fish tissue
							 elements are expressed as a single arithmetic average of tissue concentrations
							 from at least five (5) individuals of the same species where the smallest
							 individual is no less than seventy-five percent (75%) of the total length
							 (size) of the largest individual Not to be exceeded, DEQ will evaluate all
							 representative whole-body data to determine compliance with this criterion
							 element.
3. Water column values are denved using the empincal
							 BAF method Water column values are the applicable cri-tenon element in the
							 absence of steady-state condition fish tissue data In fishless waters, selenium
							 concentrations in fish from the nearest downstream waters may be used to assess
							 compliance
(3-31-22)
04.
Subsection of Salt Subbasin - Crow
			 Creek
. Crow Creek - Downstream of Sage Creek confluence to Wyoming state
			 line (US-8). Site-specific egg-ovary and whole-body criterion elements for
			 these water bodies are set out in the following table. The muscle, lentic water
			 column, and short-term water column criterion elements set out in Subsection
			 210.01., table footnote
l.
, are also applicable to the water bodies identified in this
			 subsection.
Chronic
Egg-Ovary (mg/kg
							 dw)
Fish Tissue (mg/kg
							 dw)
Water Column
							 (µg/L)
Egg-Ovary
Whole-Body
Water Lotic
20.51
12.52
4.23
mg/kg dw- milligrams per kilogram dry weight,
							 µg/L- micrograms per liter
1. Egg-ovary supersedes any whole-body muscle, or
							 water column element when fish egg-ovary concentrations are measured. Single
							 measurement of an average or composite sample of at least five (5) individuals
							 of the same species. Not to be exceeded; DEQ will evaluate all representative
							 egg-ovary data to determine compliance with this criterion element.
2. Fish tissue supersedes water column element when
							 both fish tissue (whole-body) and water concentrations are measured. Fish
							 tissue elements are expressed as a single arithmetic average of tissue
							 concentrations from at least five (5) individuals of the same species where the
							 smallest individual is no less than seventy-five percent (75%) of the total
							 length (size) of the largest individual. Not to be exceeded; DEQ will evaluate
							 all representative whole-body data to determine compliance with this criterion
							 element.
3. Water column values are derived using the
							 empirical BAF method. Water column values are the applicable cri-terion element
							 in the absence of steady-state condition fish tissue data. In fishless waters,
							 selenium concentrations in fish from the nearest downstream waters may be used
							 to assess compliance.
(3-31-22)
05.
Portions of Idaho
. (3-31-22)
a. This site-specific criterion applies in
			 the HUC subbasins set out in the following table.
HUC
Subbasin
HUC
Subbasin
16010102
Central Bear
17040208
Portneuf
16010201
Bear Lake
17040209
Lake Walcott
16010202
Middle Bear
17040210
Raft
16010203
Little Bear-Logan
17040211
Goose
16010204
Lower Bear-Malad
17040214
Beaver-Camas
16020309
Curlew Valley
17040215
Medicine Lodge
17010302
South Fork Coeurd Alene
17040216
Birch
17010306
Hangman
17040218
Big Lost
17010308
Little Spokane
17040220
Camas
17040104
Palisades
17040221
Little Wood
17040105
Salt
17050104
Upper Owyhee
17040201
Idaho Falls
17050105
South Fork Owyhee
17040202
Upper Henrys
17050106
East Little Owyhee
17040203
Lower Henrys
17050107
Middle Owyhee
17040204
Teton
17050108
Jordan
17040205
Willow
17060109
Rock
17040206
American Falls
17040207
Blackfoot
(3-31-22)
b.
			 Site-specific egg-ovary, whole-body, and muscle criterion elements for the
			 water bodies identified in Subsection
			 287.05.a. are set out in the
			 following table. The water column criterion elements set out in Subsection
			 210.01., table footnote
l.
, are also applicable to the water bodies identified in
			 Subsection 287.05.a.
Chronic
Egg-Ovary (mg/kg
							 dw)
Fish Tissue (mg/kg
							 dw)
Egg-Ovary
Whole-Body
Muscle
19.01
9.52
13.12
mg/kg dw - milligrams per kilogram dry
							 weight, µg/L - micrograms per liter
1. Egg-ovary supersedes any whole-body, muscle, or
							 water column element when fish egg-ovary concentrations are measured. Single
							 measurement of an average or composite sample of at least five (5) individuals
							 of the same species. Not to be exceeded; DEQ will evaluate all representative
							 egg-ovary data to determine compliance with this criterion element.
2. Fish whole-body or muscle tissue supersedes water
							 column element when both fish tissue and water concen-trations are measured.
							 Single measurement of an average or composite sample of at least five (5)
							 individuals of the same species where the smallest individual is no less than
							 seventy-five percent (75%) of the total length (size) of the largest
							 individual. Not to be exceeded; DEQ will evaluate all representative whole-body
							 or muscle data to determine compliance with this criterion element.
(3-31-22)