Site-Specific Aquatic Life Criteria For Selenium

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. IDAHO ADMINISTRATIVE CODE IDAPA 58.01.02 Department of Environmental Quality Water Quality Standards Section 287 Page 173 (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. 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= 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. 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. IDAHO ADMINISTRATIVE CODE IDAPA 58.01.02 Department of Environmental Quality Water Quality Standards Section 287 Page 174 (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 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. (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. 4. Lotic Water Column Equation= 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. Chronic Egg-Ovary (mg/kg dw) Fish Tissue (mg/kg dw) Water Column (µg/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 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. Chronic IDAHO ADMINISTRATIVE CODE IDAPA 58.01.02 Department of Environmental Quality Water Quality Standards Section 287 Page 175 (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. 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. 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 Coeur d 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 IDAHO ADMINISTRATIVE CODE IDAPA 58.01.02 Department of Environmental Quality Water Quality Standards Section 300 Page 176 (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. (3-31-22) 288. -- 299. (RESERVED)