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[1]Aquatic life criteria for these metals are expressed as a dissolved concentration and are calculated using the water-effect ratio (WER) and the specified conversion factor (CF). The AAC and CAC for a dissolved metal are calculated by multiplying the WER by the criterion value or formula, and then by the appropriate CF. A value of one (1) must be used for the WER unless an alternate value is established under section 8.9 of this rule. The dissolved AAC and CAC must be rounded to two (2) significant digits, except when the criteria are used as intermediate values in a calculation, such as in the calculation of water quality-based effluent limitations (WQBELs).
[2]The hardness values used in the equations for these criteria must not be greater than 400 mg/l as calcium carbonate (CaCO3), and the criteria at a hardness of 400 mg/l as CaCO3 are used for a water hardness above 400 mg/l as CaCO3. The term "lnH" is the natural log of hardness.
[3]Aquatic life criteria for this metal are expressed as a total recoverable concentration.
[4]These substances are bioaccumulative chemicals of concern.
[5]The AAC for these substances is one-half (1/2) of the Final Acute Value (FAV) as calculated by procedures developed by U.S. EPA in 1980. This value would correspond to acute aquatic values calculated using procedures of the department or U.S. EPA procedures developed in 1985 in which the calculated FAV is divided by two (2) to reduce acute toxicity.
[6]To be considered an intermittent discharge, total residual chlorine must not be detected in the discharge for a period of more than forty (40) minutes in duration, and these time periods must be separated by at least five (5) hours.
(4) Surface water quality criterion for selenium must meet the following:
(A) The surface water quality criterion for selenium, except for waters where the department has made, and U.S. EPA has approved, a site-specific determination that the criterion in Table 6-1b are applicable, is as follows:
[1]Fish tissue elements are expressed as steady-state; the aquatic system should not be experiencing new or increasing inputs of selenium.
[2]Egg or ovary supersedes any whole-body, muscle, or water column element when fish egg or ovary concentrations are measured. Any proposal to sample egg or ovary fish tissue must be submitted to the department for review and approval prior to initiation of sampling, and the department will evaluate all representative egg or ovary fish tissue data to determine compliance with this criterion element.
[3]Fish whole-body or muscle tissue supersedes the water column element when both fish tissue and water concentrations are measured. Any proposal to sample fish whole-body or muscle tissue must be submitted to the department for review and approval prior to initiation of sampling, and the department will evaluate all representative fish whole-body or muscle tissue data to determine compliance with this criterion element.
[4]Fish tissue data provide instantaneous point measurements that reflect integrative accumulation of selenium over time and space in fish populations at a given site.
[5]Water column values are the applicable criterion element in the absence of steady-state condition fish tissue data and for fishless waters. Water column values are based on dissolved total selenium in water and are derived from fish tissue values via bioaccumulation modeling. Instead of the requirements in
[6]Intermittent Exposure Equation variables mean the following:
WQCint is the water column intermittent element.
WQC30-day is the water column monthly element for either lentic or lotic waters.
Cbkgrnd is the average background selenium concentration.
fint is the fraction of any 30-day period during which elevated selenium concentrations occur, with fint assigned a value >0.033 (corresponding to one (1) day).
[7]The water column criterion element may be modified on a site-specific basis in accordance with clause (C).
(B) The surface water quality criterion for selenium, where the department has made, and U.S. EPA has approved, a site-specific determination that fishes in the Order Acipenseriformes (Order includes sturgeon and paddlefish) do not occur at the site, is as follows:
[1]This criterion is applicable to surface waters for which the department has made, and U.S. EPA has approved, a site-specific determination that fishes in the Order Acipenseriformes do not occur at the site. In making this determination, the department must comply with the procedures in clause (D).
[2]Fish tissue elements are expressed as steady-state; the aquatic system should not be experiencing new or increasing inputs of selenium.
[3]Egg or ovary supersedes any whole-body, muscle, or water column element when fish egg or ovary concentrations are measured. Any proposal to sample egg or ovary fish tissue must be submitted to the department for review and approval prior to initiation of sampling, and the department will evaluate all representative egg or ovary fish tissue data to determine compliance with this criterion element.
[4]Fish whole-body or muscle tissue supersedes the water column element when both fish tissue and water concentrations are measured. Any proposal to sample fish whole-body or muscle tissue must be submitted to the department for review and approval prior to initiation of sampling, and the department will evaluate all representative fish whole-body or muscle tissue data to determine compliance with this criterion element.
[5]Fish tissue data provide instantaneous point measurements that reflect integrative accumulation of selenium over time and space in fish populations at a given site.
[6]Water column values are the applicable criterion element in the absence of steady-state condition fish tissue data and for fishless waters. Water column values are based on dissolved total selenium in water and are derived from fish tissue values via bioaccumulation modeling. Instead of the requirements in
[7]Intermittent Exposure Equation variables mean the following:
WQCint is the water column intermittent element.
WQC30-day is the water column monthly element for either lentic or lotic waters.
Cbkgrnd is the average background selenium concentration.
fint is the fraction of any 30-day period during which elevated selenium concentrations occur, with fint assigned a value >0.033 (corresponding to one (1) day).
[8]The water column criterion element may be modified on a site-specific basis in accordance with clause (C).
(C) Modification of the selenium water column criterion element must be achieved according to the following:
(i) Site-specific water column criterion elements must be derived using either the empirical bioaccumulation factor (BAF) or mechanistic modeling method provided 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)*.
(ii) Any proposal to derive a site-specific water column criterion element must be submitted to the department for review and approval of the methodology and sampling plan prior to initiation of sampling. The department shall evaluate and approve the applicability of and use of all representative data used to derive a site-specific water column criterion element.
(iii) Any proposal to derive a site-specific water column criterion element must be protective of downstream designated uses for aquatic life and human health.
(iv) Upon receipt of an application for a site-specific water column criterion element, the department shall do the following:
(AA) Publish on the department's website all pertinent information about the proposed site-specific modification.
(BB) Provide notice and request comment on the application.
(v) Upon approval of a site-specific water column criterion element, the department shall do the following:
(AA) Publish a notice in the Indiana Register.
(BB) Place on the department's website all pertinent information about the approved site-specific modification.
(CC) Submit the site-specific modification to U.S. EPA for approval.
(DD) If approved by U.S. EPA, incorporate the site-specific modification into the water quality standards during the next revision of the water quality standards.
(vi) Site-specific modifications of this criterion must not be incorporated into a final NPDES permit or used for other Clean Water Act purposes until approved by U.S. EPA.
(D) Upon receipt of an application for a site-specific determination that fishes in the Order Acipenseriformes (Order includes sturgeon and paddlefish) do not occur at the site, the department shall do the following:
(i) Review available species occurrence and distribution information and do one (1) of the following:
(AA) Make a tentative determination that fishes in the Order Acipenseriformes do not occur at the site.
(BB) Make a determination that fishes in the Order Acipenseriformes occur at the site and deny the application.
(ii) Upon a tentative determination that fishes in the Order Acipenseriformes do not occur at the site, the department shall do the following:
(AA) Publish on the department's website all pertinent information about the proposed site-specific determination.
(BB) Provide notice and request comment on the tentative decision.
(iii) Upon a final determination that fishes in the Order Acipenseriformes do not occur at the site, the department shall do the following:
(AA) Publish a notice in the Indiana Register.
(BB) Place on the department's website all pertinent information about the approved site-specific modification.
(CC) Submit the site-specific modification to U.S. EPA for approval.
(DD) If approved by U.S. EPA, incorporate the site-specific modification into the water quality standards during the next revision of the water quality standards.
(iv) Site-specific modifications of this criterion must not be incorporated into a final NPDES permit or used for other Clean Water Act purposes until approved by U.S. EPA.
(A) The
Where: C = chloride AAC (maximum) in mg/l.
(B) The
Where: C = chloride CAC (4-day average) in mg/l.
(C)
(i) Chloride criteria may only be established based on a sulfate concentration greater than the water quality criterion for sulfate, as established under subdivision
(AA) variance provisions under section 8.8 of this rule; or
(BB) site-specific criteria provisions under section 8.9 of this rule.
(ii) The AAC and CAC for chloride calculated from the equations in this subdivision
(D) The
(E) The
(7) Surface water quality criteria for protection of human health for specific substances are as follows:
(A) The
(i) If the hardness concentration of surface waters is greater than or equal to one hundred (100) mg/l but less than or equal to five hundred (500) mg/l, and if the chloride concentration of surface waters is greater than or equal to five (5) mg/l but less than twenty-five (25) mg/l, then:
Where: C = sulfate criterion in mg/l.
(ii) If the hardness concentration of surface waters is greater than or equal to one hundred (100) mg/l but less than or equal to five hundred (500) mg/l, and if the chloride concentration of surface waters is greater than or equal to twenty-five (25) mg/l but less than or equal to five hundred (500) mg/l, then:
Where: C = sulfate criterion in mg/l.
(iii) If the hardness concentration of surface waters is less than one hundred (100) mg/l and the chloride concentration of surface waters is less than or equal to five hundred (500) mg/l, the sulfate criterion is five hundred (500) mg/l.
(iv) If the hardness concentration of surface waters is greater than five hundred (500) mg/l and the chloride concentration of surface waters is greater than or equal to five (5) mg/l, but less than or equal to five hundred (500) mg/l, the sulfate criterion
(v) If the chloride concentration of surface waters is less than five (5) mg/l, the sulfate criterion is five hundred (500) mg/l.
(B)
(i) Sulfate criteria may only be established based on a chloride concentration greater than the CAC for chloride established under subdivision
(AA) variance provisions under section 8.8 of this rule; or
(BB) site-specific criteria provisions under section 8.9 of this rule.
(ii) The surface water quality criteria for sulfate calculated from equations in clause (A)
(C) The
(9) Fluoride must not exceed two (2.0) mg/l in surface waters outside of a mixing zone except in the Ohio River and Interstate Wabash River where it must not exceed one (1.0) mg/l outside of a mixing zone.
(b)
(1) There
(A)
(B)
(2) No pH values below six (6.0) or above nine (9.0) are permitted, except daily fluctuations that:
(A) exceed pH nine (9.0); and
(B) are correlated with photosynthetic activity.
(3) Concentrations of dissolved oxygen
(A) average at least five (5.0) milligrams per liter per calendar day; and
(B) not be less than four (4.0) milligrams per liter at any time.
(4)
(A)
(B) The normal daily and seasonal temperature fluctuations that existed before the addition of heat due to other than natural causes
(C) The maximum temperature rise at any time or place above natural temperatures
(i) five (5) degrees Fahrenheit (two and eight-tenths (2.8) degrees Celsius) in streams; and
(ii) three (3) degrees Fahrenheit (one and seven-tenths (1.7) degrees Celsius) in lakes and reservoirs.
(D) Water temperatures
(i) during more than one percent (1%) of the hours in the twelve (12) month period ending with any month;
(ii) by more than three (3) degrees Fahrenheit (one and seven-tenths (1.7) degrees Celsius):
(5) The following criteria
(A) Except for waters covered in clause (B),
(i) humans;
(ii) animals;
(iii) aquatic life; or
(iv) plants.
(B) For
(c)
(1) Dissolved oxygen concentrations
(A) six (6.0) milligrams per liter at any time; and
(B) seven (7.0) milligrams per liter in areas where spawning occurs during the spawning season and in areas used for imprinting during the time salmonids are being imprinted.
(A) Seventy (70) degrees Fahrenheit (twenty-one and one-tenth (21.1) degrees Celsius) at any time.
(B) Sixty-five (65) degrees Fahrenheit (eighteen and three-tenths (18.3) degrees Celsius) during spawning and imprinting periods.
(d)
(1) The recreational season is defined as the months of April through October, inclusive.
(2) In addition to subsection (a), the criteria in this subsection are to be used to do the following:
(A) Evaluate waters for full body contact recreational uses.
(B) Establish wastewater treatment requirements.
(C) Establish effluent limits during the recreational season.
(3) For full body contact recreational uses, E. coli bacteria
(A) One hundred twenty-five (125) colony forming units (cfu) or most probable number (MPN) per one hundred (100) milliliters as a geometric mean based on not less than five (5) samples equally spaced over a thirty (30) day period.
(B) Two hundred thirty-five (235) cfu or MPN per one hundred (100) milliliters in any one (1) sample in a thirty (30) day period, except that, in cases where there are at least ten (10) samples at a given site, up to ten percent (10%) of the samples may exceed two hundred thirty-five (235) cfu or MPN per one hundred (100) milliliters where the:
(i) E. coli exceedances are incidental and attributable solely to E. coli resulting from the discharge of treated wastewater from a wastewater treatment plant as defined at
(ii) criterion in clause (A) is met.
However, a single sample
If a geometric mean cannot be calculated because five (5) equally spaced samples are not available, then the criterion stated in clause (B) must be met.
(4) For demonstrating compliance with wastewater treatment requirements, sanitary wastewater dischargers shall ensure the following:
(A) The concentration of E. coli in the undiluted discharge does not exceed one hundred twenty-five (125) cfu or MPN per one hundred (100) milliliters as a geometric mean of the effluent samples taken in a calendar month.
(B) Not more than ten percent (10%) of all samples when not less than ten (10) samples are taken and analyzed for E. coli in a calendar month exceed two hundred thirty-five (235) cfu or MPN per one hundred (100) milliliters as a daily maximum. Under this clause, the calculation of ten percent (10%) of the samples taken
(5) Effluent limits to implement the criteria in subdivision (3) during the recreational season
(A) The concentration of E. coli in the undiluted discharge
(B) Not more than ten percent (10%) of all samples in a calendar month exceed two hundred thirty-five (235) cfu or MPN per one hundred (100) milliliters as a daily maximum. Under this clause, the calculation of ten percent (10%) of the samples taken
(e)
(1) The coliform bacteria group
(A) Five thousand (5,000) cfu or MPN per one hundred (100) milliliters as a monthly average value (either MPN or membrane filter (MF) count).
(B) Five thousand (5,000) cfu or MPN per one hundred (100) milliliters in more than twenty percent (20%) of the samples examined during any month.
(C) Twenty thousand (20,000) cfu or MPN per one hundred (100) milliliters in more than five percent (5%) of the samples examined during any month.
(2) Taste and odor producing substances, other than naturally occurring,
(A) Coagulation.
(B) Sedimentation.
(C) Filtration.
(D) Disinfection.
(3) The concentrations of either chloride or sulfate
(4) The concentration of dissolved solids
(5) Surface waters
(6) The:
(A) combined concentration of nitrate-N and nitrite-N must not exceed ten (10) milligrams per liter as a thirty (30) day average value; and
(B) concentration of nitrite-N must not exceed one (1) milligram per liter as a thirty (30) day average value.
(f)
(g)
(h)
(1) becomes physically or chemically capable of supporting a higher use; or
(2) interfaces with a higher use water segment.
*This document is incorporated by reference. Copies may be obtained from the U.S. EPA National Service Center for Environmental Publications (www.epa.gov/nscep), or are available for review at the Indiana Department of Environmental Management, Office of Legal Counsel, Indiana Government Center North, Thirteenth Floor, 100 North Senate Avenue, Indianapolis, Indiana 46204.
(Water Pollution Control Division;
SECTION 2.
Authority: |
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(A) The surface water quality criteria for the protection of aquatic life for specific substances are as follows:
| Table 8-1 | |||||
| Surface Water Quality Criteria for Protection of Aquatic Life | |||||
| CAS Number | Substances | Criterion Maximum Concentration (CMC) (Maximum) (μg/L)[1] | CMC Conversion Factors (CF) | Criterion Continuous Concentration (CCC) (4-Day Average) (μg/L)[1] | CCC Conversion Factors (CF) |
| Metals (dissolved)[2][3] | |||||
| 7440382 | Arsenic | WER(340)(CF) | 1.000 | WER(150)(CF) | 1.000 |
| 7440439 | Cadmium | WER (e(0.9789 [lnH] - 3.866))(CF) | 1.136672 - [lnH] 0.041838 | WER (e(0.7977[lnH] - 3.909))(CF) | 1.101672 - [ln H]0.041838 |
| 7440473 | Chromium (III) | WER (e(0.819 [lnH] + 3.7256))(CF) | 0.316 | WER (e(0.819 [lnH] + 0.6848))(CF) | 0.860 |
| 7440473 | Chromium (VI) | WER(16)(CF) | 0.982 | WER(11)(CF) | 0.962 |
| 7440508 | Copper | WER (e(0.9422[lnH] - 1.700))(CF) | 0.960 | WER (e(0.8545[lnH] - 1.702))(CF) | 0.960 |
| 7439921 | Lead | WER (e(1.273[lnH] - 1.460))(CF) | 1.46203 - [lnH]0.145712 | WER (e(1.273[lnH] - 4.705))(CF) | 1.46203 - [lnH]0.145712 |
| 7439976 | Mercury | WER(1.694)(CF) | 0.85 | WER(0.9081)(CF) | 0.85 |
| 7440020 | Nickel | WER (e(0.846 [lnH] + 2.255))(CF) | 0.998 | WER (e(0.846 [lnH] + 0.0584))(CF) | 0.997 |
| 7440666 | Zinc | WER (e(0.8473 [lnH] + 0.884))(CF) | 0.978 | WER (e(0.8473 [lnH] + 0.884))(CF) | 0.986 |
| Organics (Total) | |||||
| 60571 | Dieldrin | 0.24 | NA | 0.056 | NA |
| 72208 | Endrin | 0.086 | NA | 0.036 | NA |
| 56382 | Parathion | 0.065 | NA | 0.013 | NA |
| 87865 | Pentachlorophenol[4] | e(1.005[pH] - 4.869) | NA | e(1.005[pH] - 5.134) | NA |
| Other Substances | |||||
| Chlorine (total residual) | 19 | NA | 11 | NA | |
| Chlorine (intermittent, total residual)[5] | 200 | NA | NA | ||
| 57125 | Cyanide (free) | 22 | NA | 5.2 | NA |
| Selenium CCC are specified in clause (B) | |||||
| Chloride CMC and CCC are specified in subdivision (5)[1] | |||||
| [1]Aquatic organisms should not be affected unacceptably if the four (4) day average concentration specified in this table for a substance does not exceed the CCC more than once every three (3) years on the average and if the one (1) hour average concentration does not exceed the CMC more than once every three (3) years on the average, except possibly where a commercially or recreationally important species is very sensitive. | |||||
| [2]Aquatic life criteria for these metals are expressed as a dissolved concentration and are calculated using the water-effect ratio (WER) and the specified conversion factor (CF). The CMC and CCC for a dissolved metal are calculated by multiplying the WER by the criterion value or formula and then by the appropriate CF. A value of one (1) must be used for the WER unless an alternate value is established under section 16 of this rule. The dissolved CMC and CCC must be rounded to two (2) significant digits, except when the criteria are used as intermediate values in a calculation, such as in the calculation of water quality-based effluent limitations (WQBELs). | |||||
| [3]The hardness values used in the equations for these criteria must not be greater than 400 mg/l as calcium carbonate (CaCO3), and the criteria at a hardness of 400 mg/l as CaCO3 are used for a water hardness above 400 mg/l as CaCO3. The term "lnH" is the natural log of hardness. | |||||
| [4]A CMC and CCC calculated for pentachlorophenol using the equation in this table must be rounded to two (2) significant digits, except when the criteria are used as intermediate values in a calculation, such as in the calculation of WQBELs. | |||||
| [5] To be considered an intermittent discharge, total residual chlorine must not be detected in the discharge for a period of more than forty (40) minutes in duration, and these time periods must be separated by at least five (5) hours. | |||||
(B) The surface water quality criterion for the protection of aquatic life for selenium is as follows:
| Table 8-1a | ||||
| Surface Water Quality Aquatic Life Criterion for Selenium (CAS # 7782492) | ||||
| Criterion Continuous Concentration (CCC) | ||||
| Media Type | Fish Tissue[1] | Water Column[5][7] | ||
| Criterion Element | Egg/Ovary[2] | Fish Whole-Body or Muscle[3] | Monthly Average Exposure | Intermittent Exposure[6] |
| Magnitude | 15.1 mg/kg dw | 8.5 mg/kg dw whole-body or 11.3 mg/kg dw muscle (skinless, boneless filet) | 1.5 μg/l in lentic aquatic systems
3.1 μg/l in lotic aquatic systems | 
|
| Duration | Instantaneous measurement[4] | Instantaneous measurement[4] | Thirty (30) days | Number of days per month with an elevated concentration |
| Frequency | Not to be exceeded | Not to be exceeded | Not more than once in three (3) years on average | Not more than once in three (3) years on average |
[1]Fish tissue elements are expressed as steady-state; the aquatic system should not be experiencing new or increasing inputs of selenium.
[2]Egg or ovary supersedes any whole-body, muscle, or water column element when fish egg or ovary concentrations are measured. Any proposal to sample egg or ovary fish tissue must be submitted to the department for review and approval prior to initiation of sampling, and the department will evaluate all representative egg or ovary fish tissue data to determine compliance with this criterion element.
[3]Fish whole-body or muscle tissue supersedes the water column element when both fish tissue and water concentrations are measured. Any proposal to sample fish whole-body or muscle tissue must be submitted to the department for review and approval prior to initiation of sampling, and the department will evaluate all representative fish whole-body or muscle tissue data to determine compliance with this criterion element.
[4]Fish tissue data provide instantaneous point measurements that reflect integrative accumulation of selenium over time and space in fish populations at a given site.
[5]Water column values are the applicable criterion element in the absence of steady-state condition fish tissue data and for fishless waters. Water column values are based on dissolved total selenium in water and are derived from fish tissue values via bioaccumulation modeling. Instead of the requirement in 327 IAC 5-2-11.4 (b)(3)(A)(i)(CC), the thirty (30) day, ten (10) year stream design flow (Q30,10) must be used for deriving total maximum daily loads (TMDLs), waste load allocations (WLAs) in the absence of TMDLs, and preliminary WLAs for tributaries of the Great Lakes system that exhibit appreciable flows relative to their volumes for the CCC water column criterion element applicable to lotic aquatic systems unless data exist to demonstrate that an alternate stream design flow is appropriate for stream-specific and pollutant-specific conditions.
[6]Intermittent Exposure Equation variables mean the following:
WQCint is the water column intermittent element.
WQC30-day is the water column monthly element for either lentic or lotic waters.
Cbkgrnd is the average background selenium concentration.
fint is the fraction of any 30-day period during which elevated selenium concentrations occur, with fint assigned a value >0.033 (corresponding to one (1) day).
[7]The water column criterion element may be modified on a site-specific basis in accordance with clause (C).
(C) Modification of the selenium water column criterion element must be achieved according to the following:
(i) Site-specific water column criterion elements must be derived using either the empirical bioaccumulation factor (BAF) or mechanistic modeling method provided 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)*.
(ii) Any proposal to derive a site-specific water column criterion element must be submitted to the department for review and approval of the methodology and sampling plan prior to initiation of sampling. The department shall evaluate and approve the applicability of and use of all representative data used to derive a site-specific water column criterion element.
(iii) Any proposal to derive a site-specific water column criterion element must be protective of downstream designated uses for aquatic life and human health.
(iv) Upon receipt of an application for a site-specific water column criterion element, the department shall do the following:
(AA) Publish on the department's website all pertinent information about the proposed site-specific modification.
(BB) Provide notice and request comment on the application.
(v) Upon approval of a site-specific water column criterion element, the department shall do the following:
(AA) Publish a notice in the Indiana Register.
(BB) Place on the department's website all pertinent information about the approved site-specific modification.
(CC) Submit the site-specific modification to U.S. EPA for approval.
(DD) If approved by U.S. EPA, incorporate the site-specific modification into the water quality standards during the next revision of the water quality standards.
(vi) Site-specific modifications of this criterion must not be incorporated into a final NPDES permit or used for other Clean Water Act purposes until approved by U.S. EPA.
(4) The following establishes dissolved CMCs CMC and CCCs CCC for certain metals at selected hardness values calculated from the equations and conversion factors in subdivision (3), Table 8-1 and using with a value of one (1) used for the WER where applicable, are as follows:
| Table 8-2 | ||||||||||
| Metals Concentrations in Micrograms Per Liter; Hardness in Milligrams Per Liter CaCO3[1] | ||||||||||
| Arsenic | Cadmium | Chromium (III) | Chromium (VI) | Copper | ||||||
| Hardness | CMC | CCC | CMC | CCC | CMC | CCC | CMC | CCC | CMC | CCC |
| 50 | 340 | 150 | 320 | 42 | 16 | 11 | 7.0 | 5.0 | ||
| 100 | 340 | 150 | 570 | 74 | 16 | 11 | 13 | 9.0 | ||
| 150 | 340 | 150 | 790 | 100 | 16 | 11 | 20 | 13 | ||
| 200 | 340 | 150 | 1,000 | 130 | 16 | 11 | 26 | 16 | ||
| 250 | 340 | 150 | 1,200 | 160 | 16 | 11 | 32 | 20 | ||
| 300 | 340 | 150 | 1,400 | 180 | 16 | 11 | 38 | 23 | ||
| 350 | 340 | 150 | 1,600 | 210 | 16 | 11 | 44 | 26 | ||
| 400 | 340 | 150 | 1,800 | 230 | 16 | 11 | 50 | 29 | ||
| Lead | Mercury | Nickel | Zinc | |||||||
| Hardness | CMC | CCC | CMC | CCC | CMC | CCC | CMC | CCC | ||
| 50 | 30 | 1.2 | 1.4 | 0.77 | 260 | 29 | 65 | 66 | ||
| 100 | 65 | 2.5 | 1.4 | 0.77 | 470 | 52 | 120 | 120 | ||
| 150 | 100 | 3.9 | 1.4 | 0.77 | 660 | 73 | 170 | 170 | ||
| 200 | 140 | 5.3 | 1.4 | 0.77 | 840 | 93 | 210 | 210 | ||
| 250 | 170 | 6.7 | 1.4 | 0.77 | 1,000 | 110 | 250 | 260 | ||
| 300 | 210 | 8.1 | 1.4 | 0.77 | 1,200 | 130 | 300 | 300 | ||
| 350 | 240 | 9.5 | 1.4 | 0.77 | 1,400 | 150 | 340 | 340 | ||
| 400 | 280 | 11 | 1.4 | 0.77 | 1,500 | 170 | 380 | 380 | ||
| [1] The dissolved metals criteria in this table have been rounded to two (2) significant digits in accordance with subdivision (3), Table 8-1. The equations and conversion factors in subdivision (3), Table 8-1 |
||||||||||
(5) The following establishes Surface water quality criteria for chloride for protection of aquatic life are as follows:
(A) The following provides the CMC for chloride as a function of hardness (in mg/l as CaCO3) and sulfate (in mg/l) in surface waters is calculated using the following formula:
Where: C = chloride CMC (maximum) in mg/l.
(B) The following provides the CCC for chloride as a function of hardness (in mg/l as CaCO3) and sulfate (in mg/l) in surface waters is calculated using the following formula:
Where: C = chloride CCC (4-Day Average) in mg/l.
(C) The CMC and CCC for chloride calculated from the equations in this subdivision shall must be rounded to the nearest whole numbers, except when the criteria are used as intermediate values in a calculation, such as in the calculation of WQBELs.
(D) The following establishes the CMC for chloride in mg/l at selected concentrations of hardness (in mg/l as CaCO3) and sulfate with the understanding that the equation in clause (A) shall be used instead of the criteria in this clause when chloride criteria are used as intermediate values in a calculation, such as in the calculation of WQBELs: is as follows:
| Table 8-2a[1] | ||||||||||
| Hardness (mg/l) | ||||||||||
| Sulfate (mg/l) | 50 | 100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 |
| 15 | 526 | 607 | 660 | 700 | 733 | 761 | 785 | 807 | 827 | 845 |
| 20 | 515 | 594 | 646 | 685 | 717 | 745 | 769 | 790 | 809 | 827 |
| 25 | 506 | 584 | 635 | 674 | 705 | 732 | 756 | 777 | 796 | 813 |
| 50 | 481 | 555 | 603 | 640 | 670 | 695 | 718 | 738 | 756 | 773 |
| 100 | 457 | 527 | 573 | 608 | 636 | 660 | 682 | 701 | 718 | 734 |
| 150 | 443 | 511 | 556 | 589 | 617 | 641 | 661 | 680 | 697 | 712 |
| 200 | 434 | 500 | 544 | 577 | 604 | 627 | 647 | 665 | 682 | 697 |
| 250 | 427 | 492 | 535 | 567 | 594 | 617 | 637 | 654 | 671 | 685 |
| 300 | 421 | 485 | 528 | 560 | 586 | 609 | 628 | 646 | 661 | 676 |
| 350 | 416 | 480 | 522 | 553 | 579 | 602 | 621 | 638 | 654 | 668 |
| 400 | 412 | 475 | 516 | 548 | 574 | 596 | 615 | 632 | 647 | 662 |
| 450 | 408 | 471 | 512 | 543 | 569 | 590 | 609 | 626 | 642 | 656 |
| 500 | 405 | 467 | 508 | 539 | 564 | 586 | 605 | 622 | 637 | 651 |
| [1] The equation in clause (A) must be used instead of the criteria in this table when chloride criteria are used as intermediate values in a calculation, such as in the calculation of WQBELs. | ||||||||||
(E) The following establishes the CCC for chloride in mg/l at selected concentrations of hardness (in mg/l as CaCO3) and sulfate with the understanding that the equation in clause (B) shall be used instead of the criteria in this clause when chloride criteria are used as intermediate values in a calculation, such as in the calculation of WQBELs: is as follows:
| Table 8-2b[1] | ||||||||||
| Hardness (mg/l) | ||||||||||
| Sulfate (mg/l) | 50 | 100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 |
| 15 | 325 | 375 | 408 | 433 | 453 | 470 | 485 | 499 | 511 | 522 |
| 20 | 318 | 367 | 399 | 423 | 443 | 460 | 475 | 488 | 500 | 511 |
| 25 | 313 | 361 | 392 | 416 | 436 | 453 | 467 | 480 | 492 | 503 |
| 50 | 297 | 343 | 373 | 395 | 414 | 430 | 444 | 456 | 467 | 477 |
| 100 | 282 | 326 | 354 | 375 | 393 | 408 | 421 | 433 | 444 | 453 |
| 150 | 274 | 316 | 343 | 364 | 381 | 396 | 409 | 420 | 430 | 440 |
| 200 | 268 | 309 | 336 | 357 | 373 | 388 | 400 | 411 | 421 | 431 |
| 250 | 264 | 304 | 331 | 351 | 367 | 381 | 394 | 404 | 414 | 423 |
| 300 | 260 | 300 | 326 | 346 | 362 | 376 | 388 | 399 | 409 | 418 |
| 350 | 257 | 297 | 322 | 342 | 358 | 372 | 384 | 394 | 404 | 413 |
| 400 | 255 | 294 | 319 | 339 | 355 | 368 | 380 | 391 | 400 | 409 |
| 450 | 252 | 291 | 316 | 336 | 351 | 365 | 377 | 387 | 397 | 405 |
| 500 | 250 | 289 | 314 | 333 | 349 | 362 | 374 | 384 | 394 | 402 |
| [1] The equation in clause (B) must be used instead of the criteria in this table when chloride criteria are used as intermediate values in a calculation, such as in the calculation of WQBELs. | ||||||||||
(6) The following establishes Surface water quality criteria for protection of human health are as follows:
| Table 8-3 | ||||||
| Surface Water Quality Criteria for Protection of Human Health[1] | ||||||
| Human Noncancer Criteria (HNC) | Human Cancer Criteria (HCC) | |||||
| CAS Number | Substances | Drinking Water (μg/l) | Nondrinking Water (μg/l) | Drinking Water (μg/l) | Nondrinking Water (μg/l) | |
| Metals (total recoverable) | ||||||
| 7439976 | Mercury (including methylmercury) | 0.0018 | 0.0018 | |||
| Organics (total) | ||||||
| 71432 | Benzene | 19 | 510 | 12 | 310 | |
| 57749 | Chlordane | 0.0014 | 0.0014 | 0.00025 | 0.00025 | |
| 108907 | Chlorobenzene | 470 | 3,200 | |||
| 50293 | DDT | 0.002 | 0.002 | 0.00015 | 0.00015 | |
| 60571 | Dieldrin | 0.00041 | 0.00041 | 6.5 × 10-6 | 6.5 × 10-6 | |
| 105679 | 2,4-dimethylphenol | 450 | 8,700 | |||
| 51285 | 2,4-dinitrophenol | 55 | 2,800 | |||
| 118741 | Hexachlorobenzene | 0.046 | 0.046 | 0.00045 | 0.00045 | |
| 67721 | Hexachloroethane | 6 | 7.6 | 5.3 | 6.7 | |
| 58899 | Lindane | 0.47 | 0.5 | |||
| 75092 | Methylene chloride | 1,600 | 90,000 | 47 | 2600 | |
| 1336363 | PCBs (class) | 6.8 × 10-6 | 6.8 × 10-6 | |||
| 1746016 | 2,3,7,8-TCDD (dioxin) | 6.7 × 10-8 | 6.7 × 10-8 | 8.6 × 10-9 | 8.6 × 10-9 | |
| 108883 | Toluene | 5,600 | 51,000 | |||
| 8001352 | Toxaphene | 6.8 × 10-5 | 6.8 × 10-5 | |||
| 79016 | Trichloroethylene | 29 | 370 | |||
| Other Substances | ||||||
| 57125 | Cyanide (total) | 600 | 48,000 | |||
| [1]The HNC and HCC are thirty (30) day average criteria. | ||||||
(7) The following establishes Surface water quality criteria for protection of wildlife are as follows:
| Table 8-4 | |||
| Surface Water Quality Criteria for Protection of Wildlife[1] | |||
| CAS Number | Substances | Wildlife Criteria (μg/l) | |
| Metals (total recoverable) | |||
| 7439976 | Mercury (including methylmercury) | 0.0013 | |
| Organics (total) | |||
| 50293 | DDT and metabolites | 1.1 × 10-5 | |
| 1336363 | PCBs (class) | 1.2 × 10-4 | |
| 1746016 | 2, 3, 7, 8-TCDD (dioxin) | 3.1 × 10-9 | |
| [1]The WC are thirty (30) day average criteria. | |||
(c) This subsection establishes minimum surface water quality criteria for aquatic life. In addition to the criteria in subsection (b), this subsection ensures the following minimum conditions necessary for the maintenance of a well-balanced aquatic community. The following conditions are applicable at any point in the surface waters outside of the applicable mixing zone, as determined in accordance with section 7 of this rule, to ensure conditions necessary for the maintenance of a well-balanced aquatic community:
(1) There shall must be no substances substance that:
(A) impart imparts unpalatable flavor to food fish; or
(B) result results in offensive odors in the vicinity of the water.
(2) No pH values below six (6.0) or above nine (9.0) are permitted, except daily fluctuations that:
(A) exceed pH nine (9.0); and
(B) are correlated with photosynthetic activity.
(3) Concentrations of dissolved oxygen shall: must:
(A) average at least five (5.0) milligrams per liter per calendar day; and
(B) not be less than four (4.0) milligrams per liter at any time.
(4) The following are Conditions for temperature are as follows:
(A) There shall be no Abnormal temperature changes that may adversely affect aquatic life are prohibited unless caused by natural conditions.
(B) The normal daily and seasonal temperature fluctuations that existed before the addition of heat due to other than natural causes shall must be maintained.
(C) Water temperatures shall must not exceed the maximum limits in the following table:
(i) during more than one percent (1%) of the hours in the twelve (12) month period ending with any month; At no time shall the water temperature at such locations exceed the maximum limits in the following table and
(ii) by more than three (3) degrees Fahrenheit (one and seven-tenths (1.7) degrees Celsius):
| Table 8-5 | ||
| Maximum Instream Water Temperatures | ||
| Month | St. Joseph River Tributary to Lake Michigan Upstream of the Twin Branch Dam °F(°C) | All Other Indiana Streams in the Great Lakes System °F(°C) |
| January | 50 (10) | 50 (10) |
| February | 50 (10) | 50 (10) |
| March | 55 (12.8) | 60 (15.6) |
| April | 65 (18.3) | 70 (21.1) |
| May | 75 (23.9) | 80 (26.7) |
| June | 85 (29.4) | 90 (32.2) |
| July | 85 (29.4) | 90 (32.2) |
| August | 85 (29.4) | 90 (32.2) |
| September | 84 (29.4) | 90 (32.2) |
| October | 70 (21.1) | 78 (25.5) |
| November | 60 (15.6) | 70 (21.1) |
| December | 50 (10) | 57 (14.0) |
(D) The following temperature criteria shall apply to Lake Michigan:
(i) In all receiving waters, the points of measurement normally shall must be in the first meter below the surface at such depths necessary to avoid thin layer surface warming due to extreme ambient air temperatures, but, where required to determine the true distribution of heated wastes and natural variations in water temperatures, measurements shall must be at a greater depth and at several depths as a thermal profile.
(ii) There shall be no Abnormal temperature changes so as to be injurious to fish, wildlife, or other aquatic life, or the growth or propagation thereof, are prohibited. In addition, plume interaction with the bottom shall: must:
(AA) be minimized; and
(BB) not injuriously affect fish, shellfish, and wildlife spawning or nursery areas.
(iii) The normal daily and seasonal temperature fluctuations that existed before the addition of heat shall must be maintained.
(iv) At any time and at a maximum distance of a one thousand (1,000) foot arc inscribed from a fixed point adjacent to the discharge or as agreed upon by the commissioner and federal regulatory agencies, the following shall apply:
(AA) The receiving water temperature shall must not be more than three (3) degrees Fahrenheit (one and seven-tenths (1.7) degrees Celsius) above the existing natural water temperature.
(BB) Thermal discharges to Lake Michigan shall must comply with the following maximum temperature requirements:
(aa) Thermal discharges to Lake Michigan shall must not raise the maximum temperature in the receiving water above those listed in the following table, except to the extent the permittee adequately demonstrates that the exceedance is caused by the water temperature of the intake water:
| Table 8-6 | |||
| Maximum Water Temperatures | |||
| Month | °F(°C) | ||
| January | 45 (7) | ||
| February | 45 (7) | ||
| March | 45 (7) | ||
| April | 55 (13) | ||
| May | 60 (16) | ||
| June | 70 (21) | ||
| July | 80 (27) | ||
| August | 80 (27) | ||
| September | 80 (27) | ||
| October | 65 (18) | ||
| November | 60 (16) | ||
| December | 50 (10) | ||
(bb) If the permittee demonstrates that the intake water temperature is within three (3) degrees Fahrenheit below an applicable maximum temperature under subitem (aa), Table 8-6, then not more than a three (3) degree Fahrenheit exceedance of the maximum water temperature shall be is permitted.
(v) The following facilities described as follows that discharge into the open waters of Lake Michigan shall be are limited to the amount essential for blowdown in the operation of a closed cycle cooling facility:
(AA) All facilities that have new waste heat discharges exceeding a daily average of five-tenths (0.5) billion British thermal units (Btu) per hour. As used in this item, "new waste heat discharge" means a any discharge that had not begun operations as of February 11, 1972.
(BB) All facilities with existing waste heat discharges that increase the quantity of waste heat discharged by more than a daily average of five-tenths (0.5) billion British thermal units Btu per hour.
(vi) Water intakes shall must be designed and located to minimize entrainment and damage to desirable organisms. Requirements may vary depending upon local conditions, but, in general, intakes shall: must:
(AA) have minimum water velocity; and
(BB) not be located in spawning or nursery areas of important fishes.
Water velocity at screens and other exclusion devices shall also must be at a minimum.
(vii) Discharges other than those now in existence shall be such that the on or before February 11, 1972, must not have thermal plumes do not that overlap or intersect.
(viii) Facilities discharging more than a daily average of five-tenths (0.5) billion British thermal units Btu of waste heat shall: must:
(AA) continuously record intake and discharge temperature and flow; and
(BB) make those records available to the public or regulatory agencies upon request.
(5) The following criteria shall must be used to regulate ammonia:
(A) Concentrations of total ammonia (as N) shall must not exceed the CMC outside the zone of initial dilution or the final acute value (FAV = 2 (CMC)) in the undiluted discharge unless, for a discharge to a receiving stream or Lake Michigan, an alternate mixing zone demonstration is conducted and approved in accordance with 327 IAC 5-2-11.4 (b)(4), in which case, the CMC shall must be met outside the applicable alternate mixing zone. The CMC of total ammonia (as N) is determined using the following equation:
| Where: | FT | = | 100.03(20-T) | ||
| FPH | = | 1; when: 8 < pH < 9; or | |||
| 1 + 10(7.4 - pH) | ; when: 6.5 < pH < 8 | ||||
| 1.25 | |||||
| pKa | = | 0.09018 + | 2729 | ||
| T + 273.2 | |||||
| T | = | Temperature in °C | |||
(B) The CCC of total ammonia (as N) is determined using the following equation:
| Where: | FT | = | 100.03(20-T) | ||
| FPH | = | 1; when: 8 < pH < 9; or | |||
| 1 + 10(7.4 - pH) | ; when: 6.5 < pH < 8 | ||||
| 1.25 | |||||
| RATIO | = | 13.5; when: 7.7 < pH < 9; or | |||
| (20)(10(7.7 - pH)) | ; when: 6.5 < pH < 7.7 | ||||
| 1 + 10(7.4 - pH) | |||||
| pKa | = | 0.09018 + | 2729 | ||
| T + 273.2 | |||||
| T | = | Temperature in °C | |||
(C) The use of the equations in clause (A) results in the following CMCs for total ammonia (as N) at different temperatures and pHs:
| Table 8-7 | |||||||
| Criterion Maximum Concentrations for Total Ammonia (as N) Temperature (°C) | |||||||
| pH | 0 | 5 | 10 | 15 | 20 | 25 | 30 |
| 6.5 | 28.48 | 26.61 | 25.23 | 24.26 | 23.64 | 23.32 | 23.29 |
| 6.6 | 27.68 | 25.87 | 24.53 | 23.59 | 22.98 | 22.68 | 22.65 |
| 6.7 | 26.74 | 24.99 | 23.69 | 22.78 | 22.20 | 21.92 | 21.90 |
| 6.8 | 25.64 | 23.96 | 22.72 | 21.85 | 21.30 | 21.03 | 21.01 |
| 6.9 | 24.37 | 22.78 | 21.60 | 20.78 | 20.26 | 20.01 | 20.00 |
| 7.0 | 22.95 | 21.45 | 20.35 | 19.58 | 19.09 | 18.86 | 18.86 |
| 7.1 | 21.38 | 19.98 | 18.96 | 18.24 | 17.80 | 17.59 | 17.60 |
| 7.2 | 19.68 | 18.40 | 17.46 | 16.81 | 16.40 | 16.22 | 16.24 |
| 7.3 | 17.90 | 16.73 | 15.88 | 15.29 | 14.93 | 14.78 | 14.81 |
| 7.4 | 16.06 | 15.02 | 14.26 | 13.74 | 13.42 | 13.30 | 13.35 |
| 7.5 | 14.23 | 13.31 | 12.64 | 12.19 | 11.92 | 11.81 | 11.88 |
| 7.6 | 12.44 | 11.65 | 11.07 | 10.67 | 10.45 | 10.37 | 10.45 |
| 7.7 | 10.75 | 10.06 | 9.569 | 9.238 | 9.052 | 9.003 | 9.088 |
| 7.8 | 9.177 | 8.597 | 8.181 | 7.907 | 7.760 | 7.734 | 7.830 |
| 7.9 | 7.753 | 7.268 | 6.924 | 6.701 | 6.589 | 6.584 | 6.689 |
| 8.0 | 6.496 | 6.095 | 5.813 | 5.636 | 5.555 | 5.569 | 5.683 |
| 8.1 | 5.171 | 4.857 | 4.639 | 4.508 | 4.457 | 4.486 | 4.602 |
| 8.2 | 4.119 | 3.873 | 3.707 | 3.612 | 3.584 | 3.625 | 3.743 |
| 8.3 | 3.283 | 3.092 | 2.967 | 2.900 | 2.891 | 2.942 | 3.061 |
| 8.4 | 2.618 | 2.472 | 2.379 | 2.335 | 2.340 | 2.399 | 2.519 |
| 8.5 | 2.091 | 1.979 | 1.911 | 1.886 | 1.903 | 1.968 | 2.089 |
| 8.6 | 1.672 | 1.588 | 1.540 | 1.529 | 1.555 | 1.625 | 1.747 |
| 8.7 | 1.339 | 1.277 | 1.246 | 1.246 | 1.279 | 1.353 | 1.475 |
| 8.8 | 1.075 | 1.030 | 1.011 | 1.021 | 1.060 | 1.137 | 1.260 |
| 8.9 | 0.8647 | 0.8336 | 0.8254 | 0.8418 | 0.8862 | 0.9650 | 1.088 |
| 9.0 | 0.6979 | 0.6777 | 0.6777 | 0.6998 | 0.7479 | 0.8286 | 0.9521 |
(D) The use of the equations in clause (B) results in the following CCCs for total ammonia (as N) at different temperatures and pHs:
| Table 8-8 | |||||||
| Criterion Continuous Concentrations for Total Ammonia (as N) Temperature (°C) | |||||||
| pH | 0 | 5 | 10 | 15 | 20 | 25 | 30 |
| 6.5 | 2.473 | 2.310 | 2.191 | 2.106 | 2.052 | 2.025 | 2.022 |
| 6.6 | 2.473 | 2.311 | 2.191 | 2.107 | 2.053 | 2.026 | 2.023 |
| 6.7 | 2.473 | 2.311 | 2.191 | 2.107 | 2.054 | 2.027 | 2.025 |
| 6.8 | 2.473 | 2.311 | 2.192 | 2.108 | 2.055 | 2.028 | 2.027 |
| 6.9 | 2.474 | 2.312 | 2.193 | 2.109 | 2.056 | 2.030 | 2.030 |
| 7.0 | 2.474 | 2.312 | 2.193 | 2.110 | 2.058 | 2.033 | 2.033 |
| 7.1 | 2.475 | 2.313 | 2.195 | 2.112 | 2.060 | 2.036 | 2.037 |
| 7.2 | 2.475 | 2.314 | 2.196 | 2.114 | 2.063 | 2.040 | 2.043 |
| 7.3 | 2.476 | 2.315 | 2.198 | 2.116 | 2.066 | 2.044 | 2.050 |
| 7.4 | 2.477 | 2.317 | 2.200 | 2.119 | 2.070 | 2.050 | 2.058 |
| 7.5 | 2.478 | 2.319 | 2.202 | 2.123 | 2.075 | 2.058 | 2.069 |
| 7.6 | 2.480 | 2.321 | 2.206 | 2.128 | 2.082 | 2.067 | 2.082 |
| 7.7 | 2.450 | 2.294 | 2.181 | 2.106 | 2.063 | 2.052 | 2.071 |
| 7.8 | 2.092 | 1.959 | 1.865 | 1.802 | 1.769 | 1.763 | 1.785 |
| 7.9 | 1.767 | 1.657 | 1.578 | 1.527 | 1.502 | 1.501 | 1.525 |
| 8.0 | 1.481 | 1.389 | 1.325 | 1.285 | 1.266 | 1.269 | 1.295 |
| 8.1 | 1.179 | 1.107 | 1.057 | 1.027 | 1.016 | 1.022 | 1.049 |
| 8.2 | 0.9387 | 0.8828 | 0.8450 | 0.8232 | 0.8169 | 0.8263 | 0.8531 |
| 8.3 | 0.7481 | 0.7048 | 0.6762 | 0.6610 | 0.6589 | 0.6705 | 0.6976 |
| 8.4 | 0.5968 | 0.5634 | 0.5421 | 0.5321 | 0.5334 | 0.5468 | 0.5741 |
| 8.5 | 0.4766 | 0.4511 | 0.4357 | 0.4298 | 0.4337 | 0.4485 | 0.4760 |
| 8.6 | 0.3811 | 0.3619 | 0.3511 | 0.3485 | 0.3545 | 0.3704 | 0.3981 |
| 8.7 | 0.3052 | 0.2910 | 0.2839 | 0.2839 | 0.2916 | 0.3083 | 0.3362 |
| 8.8 | 0.2450 | 0.2347 | 0.2305 | 0.2326 | 0.2417 | 0.2591 | 0.2871 |
| 8.9 | 0.1971 | 0.1900 | 0.1881 | 0.1919 | 0.2020 | 0.2199 | 0.2480 |
| 9.0 | 0.1591 | 0.1545 | 0.1545 | 0.1595 | 0.1705 | 0.1889 | 0.2170 |
(d) This subsection establishes surface water quality for cold-water fish. The Waters designated by the Indiana department of natural resources for put-and-take trout fishing and listed in section 5(a)(3) of this rule are designated as salmonid waters and shall must be protected for cold-water fish. In addition to subsections (b) and (c), the following criteria are established to ensure conditions necessary for the maintenance of a well-balanced, cold-water fish community and are applicable at any point in the waters outside of the applicable a mixing zone, as determined in accordance with section 7 of this rule, in the surface waters designated as salmonid waters to ensure conditions necessary for the maintenance of a well-balanced, cold-water fish community:
(1) Dissolved oxygen concentrations shall must not be less than:
(A) six (6.0) milligrams per liter at any time; and
(B) seven (7.0) milligrams per liter in areas where spawning occurs during the spawning season and in areas used for imprinting during the time salmonids are being imprinted.
Dissolved oxygen concentrations in the open waters of Lake Michigan shall must not be less than seven (7.0) milligrams per liter at any time.
(2) The maximum temperature rise above natural shall must not exceed two (2) degrees Fahrenheit (one and one-tenth (1.1) degrees Celsius) at any time or place and, unless due to natural causes, the temperature shall must not exceed the following:
(A) Seventy (70) degrees Fahrenheit (twenty-one and one-tenth (21.1) degrees Celsius) at any time.
(B) Sixty-five (65) degrees Fahrenheit (eighteen and three-tenths (18.3) degrees Celsius) during spawning or imprinting periods.
(e) This subsection establishes Bacteriological quality for recreational uses during the recreational season is as follows:
(1) The recreational season is defined as the months of April through October, inclusive.
(2) In addition to subsection (b), the criteria in this subsection shall are to be used to do the following:
(A) Evaluate waters for full body contact recreational uses.
(B) Establish wastewater treatment requirements.
(C) Establish effluent limits during the recreational season.
(3) For full body contact recreational uses, E. coli bacteria shall must not exceed the following:
(A) One hundred twenty-five (125) colony forming units (cfu) or most probable number (MPN) per one hundred (100) milliliters as a geometric mean based on not less than five (5) samples equally spaced over a thirty (30) day period.
(B) Two hundred thirty-five (235) cfu or MPN per one hundred (100) milliliters in any one (1) sample in a thirty (30) day period, except that, in cases where there are at least ten (10) samples at a given site, up to ten percent (10%) of the samples may exceed two hundred thirty-five (235) cfu or MPN per one hundred (100) milliliters where the:
(i) the E. coli exceedances are incidental and attributable solely to E. coli resulting from the discharge of treated wastewater from a wastewater treatment plant as defined at IC 13-11-2-258 ; and
(ii) the criterion in clause (A) is met.
However, a single sample shall be is used for making beach notification and closure decisions.
If a geometric mean cannot be calculated because five (5) equally spaced samples are not available, then the criterion stated in clause (B) must be met.
(4) For demonstrating compliance with wastewater treatment requirements, sanitary wastewater dischargers shall ensure the following:
(A) The concentration of E. coli in the undiluted discharge does not exceed one hundred twenty-five (125) cfu or MPN per one hundred (100) milliliters as a geometric mean of the effluent samples taken in a calendar month.
(B) Not more than ten percent (10%) of all samples when not less than ten (10) samples are taken and analyzed for E. coli in a calendar month exceed two hundred thirty-five (235) cfu or MPN per one hundred (100) milliliters as a daily maximum. Under this clause, the calculation of ten percent (10%) of the samples taken shall must be limited to the lowest whole number result.
(5) Effluent limits to implement the criteria in subdivision (3) during the recreational season shall must be established in NPDES permits by incorporating the following that are to be applied to the undiluted discharge:
(A) The concentration of E. coli in the undiluted discharge shall must not exceed one hundred twenty-five (125) cfu or MPN per one hundred (100) milliliters as a geometric mean of the effluent samples taken in a calendar month.
(B) Not more than ten percent (10%) of all samples in a calendar month exceed two hundred thirty-five (235) cfu or MPN per one hundred (100) milliliters as a daily maximum. Under this clause, the calculation of ten percent (10%) of the samples taken shall must be limited to the lowest whole number result.
(f) This subsection establishes surface water quality for public water supply. In addition to subsection (b), the following criteria are established to protect the surface water quality at the point at which water is withdrawn for treatment for public water supply are as follows:
(1) The coliform bacteria group shall must not exceed the following:
(A) Five thousand (5,000) cfu or MPN per one hundred (100) milliliters as a monthly average value (either MPN or membrane filter (MF) count).
(B) Five thousand (5,000) cfu or MPN per one hundred (100) milliliters in more than twenty percent (20%) of the samples examined during any month.
(C) Twenty thousand (20,000) cfu or MPN per one hundred (100) milliliters in more than five percent (5%) of the samples examined during any month.
(2) Taste and odor producing substances, other than those naturally occurring, shall must not interfere with the production of a finished water by conventional treatment consisting of the following:
(A) Coagulation.
(B) Sedimentation.
(C) Filtration.
(D) Disinfection.
(3) The concentrations of either chloride or sulfate shall must not exceed two hundred fifty (250) milligrams per liter unless due to naturally occurring sources.
(4) The concentration of dissolved solids shall must not exceed seven hundred fifty (750) milligrams per liter unless due to naturally occurring sources. A specific conductance of one thousand two hundred (1,200) micromhos per centimeter (at twenty-five (25) degrees Celsius) may be considered equivalent to a dissolved solids concentration of seven hundred fifty (750) milligrams per liter.
(5) Surface waters shall be considered are acceptable for public water supply if radium-226 and strontium-90 are present in amounts not exceeding three (3) and ten (10) picocuries per liter, respectively. In the known absence of strontium-90 and alpha emitters, the water supply is acceptable when the gross beta concentrations do not exceed one thousand (1,000) picocuries per liter.
(6) The:
(A) combined concentration of nitrate-N and nitrite-N shall must not exceed ten (10) milligrams per liter; and
(B) concentration of nitrite-N shall must not exceed one (1) milligram per liter.
(7) Chemical constituents in the waters shall must not be present in such at levels as to that prevent, after conventional treatment, meeting the drinking water standards contained in 327 IAC 8-2 , due to other than natural causes.
(g) This subsection establishes surface water quality for industrial water supply. In addition to subsection (b), the criterion to ensure protection of water quality at the point at which water is withdrawn for use (either with or without treatment) for industrial cooling and processing is that, other than from naturally occurring sources, the dissolved solids shall must not exceed seven hundred fifty (750) milligrams per liter at any time, other than from naturally occurring sources, to ensure protection of water quality at the point at which surface water is withdrawn for use, either with or without treatment, for industrial cooling and processing. A specific conductance of one thousand two hundred (1,200) micromhos per centimeter (at twenty-five (25) degrees Celsius) may be considered equivalent to a dissolved solids concentration of seven hundred fifty (750) milligrams per liter.
(h) This subsection establishes surface water quality for agricultural uses. The criteria to ensure surface water quality conditions necessary for agricultural use are the same as those in subsection (b).
(i) This subsection establishes surface water quality for limited uses. The quality of surface waters designated for limited uses under section 19(a) of this rule shall, must, at a minimum, meet the following criteria (1) The criteria contained in subsection subsections (b), (2) The criteria contained in subsection (e), (3) The criteria contained in subsection and (g), (4) The waters must and be aerobic at all times. (5) Notwithstanding subdivisions (1) through (4), the quality of a limited use stream However, the water must meet the criteria that are applicable to the higher use water at the point where it a limited use water:
(1) becomes physically or chemically capable of supporting a higher use; or at its interface
(2) interfaces with a higher use water segment. shall meet the criteria that are applicable to the higher use water.
(j) Additional requirements for the open waters of Lake Michigan are as follows:
(1) In addition to complying with all other applicable subsections, open waters in Lake Michigan shall must meet the following criteria:
| Table 8-9 | |
| Additional Criteria for Lake Michigan | |
| Parameters | Criteria |
| Dissolved oxygen | Dissolved oxygen concentrations |
| pH | No pH values below six (6.0) or above nine (9.0) are permitted, except daily fluctuations that exceed pH 9.0 and are correlated with photosynthetic activity. |
| Chloride | 250 mg/l[1] |
| Phenols | |
| Sulfate | 250 mg/l[1] |
| Total phosphorus | |
| Total dissolved solids | 750 mg/l[1] |
| Fluoride | 1.0 mg/l[1] |
| Dissolved iron | 300 μg/l[1] |
| [1] This criterion |
|
(2) During each triennial review of the water quality standards, prior to preliminary adoption of revised rules, the following must occur:
(A) The department shall prepare a report for the water pollution control board on the monitoring data for the constituents parameters in the following table Table 8-10, as measured at the drinking water intakes in Lake Michigan.
(B) If these the monitoring data in clause (A) indicate that the levels of the constituents parameters are either increasing or exceed the levels in the Table 8-10, the report shall for the board must provide available information on the known and potential causes of the increased levels of these parameters, the known and potential impacts on aquatic life, wildlife, and human health, and any recommended revisions of the criteria.
| Table 8-10 | ||||
| Parameters | Levels | |||
| pH | 7.5-8.5 s.u. | |||
| Chloride | ||||
| Monthly average | 15 mg/l | |||
| Daily maximum | 20 mg/l | |||
| Sulfate | ||||
| Monthly average | 26 mg/l | |||
| Daily maximum | 50 mg/l | |||
| Total phosphorus | ||||
| Monthly average | 0.03 mg/l | |||
| Daily maximum | 0.04 mg/l | |||
| Total dissolved solids | ||||
| Monthly average | 172 mg/l | |||
| Daily maximum | 200 mg/l | |||
*This document is incorporated by reference. Copies may be obtained from the U.S. EPA National Service Center for Environmental Publications (www.epa.gov/nscep), or are available for review at the Indiana Department of Environmental Management, Office of Legal Counsel, Indiana Government Center North, Thirteenth Floor, 100 North Senate Avenue, Indianapolis, Indiana 46204.
(Water Pollution Control Division;
LSA Document #14-58(F)
Proposed Rule: 20210421-IR-327140058PRA
Hearing Held: August 11, 2021
Approved by Attorney General: October 26, 2021
Approved by Governor: November 2, 2021
Filed with Publisher: November 5, 2021, 12:56 p.m.
Documents Incorporated by Reference: 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)
Small Business Regulatory Coordinator: Angela Taylor, IDEM Small Business Regulatory Coordinator/CTAP Small Business Liaison, IGCN 1316, 100 North Senate Avenue, Indianapolis, IN 46204-2251, (317) 233-0572 or (800) 988-7901, ctap@idem.in.gov
Small Business Assistance Program Ombudsman: Erin Moorhous, IDEM Small Business Assistance Program Ombudsman/Business, Agricultural, and Legislative Liaison, IGCN 1301, 100 North Senate Avenue, Indianapolis, IN 46204-2251, (317) 232-8921 or (800) 451-6027, emoorhous@idem.in.gov
Posted: 12/01/2021 by Legislative Services Agency
DIN: 20211201-IR-327140058FRA
Composed: Apr 23,2024 9:34:41PM EDT
A PDF version of this document.