-IR- Database Guide
-IR- Database: Indiana Register

TITLE 327 WATER POLLUTION CONTROL DIVISION

SECOND NOTICE OF COMMENT PERIOD
LSA Document #14-58

AQUATIC LIFE AND HUMAN HEALTH AMBIENT WATER QUALITY CRITERIA FOR METALS


PURPOSE OF NOTICE
The Indiana Department of Environmental Management (IDEM) is soliciting public comment on amendments to rules at 327 IAC 2-1-6 and 327 IAC 2-1.5-8 to revise Indiana's aquatic life and human health ambient water quality criteria (WQC) for select metals. Revisions to criteria reflect updates based on current science and many are National Recommended Water Quality Criteria (NRWQC) at Section 304(a) of the Clean Water Act (CWA). This rulemaking is being conducted to evaluate the need to update or revise these criteria in order to remain consistent with state and federal laws and to ensure that Indiana's WQC for metals continue to reflect the best available science and support sound water quality management policies to improve and protect the water resources of the state. Based on the latest scientific knowledge, updated aquatic life and human health ambient WQC for these metals may become more or less stringent than current criteria. IDEM seeks comment on the affected citations listed and any other provisions of Title 327 that may be affected by this rulemaking.

HISTORY
First Notice of Comment Period: March 5, 2014, Indiana Register (DIN: 20140305-IR-327140058FNA).

CITATIONS AFFECTED: 327 IAC 2-1-6; 327 IAC 2-1.5-8.


SUBJECT MATTER AND BASIC PURPOSE OF RULEMAKING
Basic Purpose and Background
The CWA requires the states to periodically review and update their water quality standards (WQS) as appropriate. This rulemaking proposes updates to Indiana's WQS. Many of the proposed revisions to these metal criteria reflect updates to NRWQC at Section 304(a) of the CWA. The criteria to be revised are located in 327 IAC 2-1-6 for waters not within the Great Lakes System and 327 IAC 2-1.5-8 for waters within the Great Lakes System.
Indiana has delegation from the federal government to conduct the state's water quality programs, including the National Pollutant Discharge Elimination System (NPDES) program, that establishes wastewater discharge permit limitations based on the established water quality criteria. WQC form the basis for the maximum allowable concentrations of chemical pollutants and are used as the regulatory targets for permitting, compliance, enforcement, monitoring, assessing state water quality, and the development of Total Maximum Daily Loads (TMDLs). This rulemaking will update both acute and chronic criteria for select metals to reflect current science. For details on the proposed update and impact, please refer to the IDEM website at: http://in.gov/idem/cleanwater/2329.htm under the "Active Projects" heading for a document of tables containing the proposed revisions.
IDEM seeks comment on the affected citations listed, including suggestions for specific language, any other provisions of Title 327 that may be affected by this rulemaking, and alternative ways to achieve the purpose of the rulemaking.
IC 13-14-9-4 Identification of Restrictions and Requirements Not Imposed under Federal Law
No element of the draft rule imposes either a restriction or a requirement on persons to whom the draft rule applies that is not imposed under federal law.
Potential Fiscal Impact
The proposed revisions to the metals criteria are based on current science and many are nationally recommended at Section 304(a) of the CWA. If the state does not revise the metals criteria, the United States Environmental Protection Agency (U.S. EPA) could impose its own standard in place of the state's rules or object to NPDES permits with limits not based on updated criteria. This rulemaking to revise metals criteria has no potential fiscal impact beyond federal requirements.
Public Participation and Work Group Information
At this time, no work group is planned for the rulemaking. If you feel that a work group or other informal discussion on the rule is appropriate, please contact MaryAnn Stevens, Rules Development Branch, Office of Legal Counsel at (317) 232-8635 or (800) 451-6027 (in Indiana).

SUMMARY/RESPONSE TO COMMENTS FROM THE FIRST COMMENT PERIOD
IDEM requested public comment from March 5, 2014, through April 4, 2014, on alternative ways to achieve the purpose of the rule and suggestions for the development of draft rule language. IDEM received no comments in response to the First Notice of Comment Period.

REQUEST FOR PUBLIC COMMENTS
This notice requests the submission of comments on the draft rule language, including suggestions for specific revisions to language to be contained in the draft rule. Comments may be submitted in one of the following ways:
(1) By mail or common carrier to the following address:
LSA Document #14-58 Metals Criteria Revisions
MaryAnn Stevens
Rules Development Branch
Office of Legal Counsel
Indiana Department of Environmental Management
Indiana Government Center North
100 North Senate Avenue
Indianapolis, IN 46204-2251
(2) By facsimile to (317) 233-5970. Please confirm the timely receipt of faxed comments by calling the Rules Development Branch at (317) 232-8922.
(3) By electronic mail to mstevens@idem.in.gov. To confirm timely delivery of submitted comments, please request a document receipt when sending the electronic mail. PLEASE NOTE: Electronic mail comments will NOT be considered part of the official written comment period unless they are sent to the address indicated in this notice.
(4) Hand delivered to the receptionist on duty at the thirteenth floor reception desk, Office of Legal Counsel, Indiana Government Center North, 100 North Senate Avenue, Indianapolis, Indiana.
Regardless of the delivery method used, to properly identify each comment with the rulemaking action it is intended to address, each comment document must clearly specify the LSA document number of the rulemaking.

COMMENT PERIOD DEADLINE
All comments must be postmarked, faxed, or time stamped not later than January 2, 2018. Hand-delivered comments must be delivered to the appropriate office by 4:45 p.m. on the above-listed deadline date.
Additional information regarding this action may be obtained from MaryAnn Stevens, Rules Development Branch, Office of Legal Counsel, (317) 232-8635 or (800) 451-6027 (in Indiana) or Eileen Hack, Technical Environmental Specialist, Office of Water Quality, (317) 234-7914 or (800) 451-6027 (in Indiana).

DRAFT RULE

SECTION 1. 327 IAC 2-1-6 IS AMENDED TO READ AS FOLLOWS:

327 IAC 2-1-6 Minimum surface water quality standards

Authority: IC 13-14-8-2; IC 13-14-8-3; IC 13-18-4-3

Sec. 6. (a) The following are minimum surface water quality conditions:
(1) All surface waters, at all times and at all places, including waters within the a mixing zone, shall meet the minimum conditions of being must be free from substances, materials, floating debris, oil, or scum attributable to municipal, industrial, agricultural, and other land use practices, or other discharges that do any of the following:
(A) Will Settle to form putrescent or otherwise objectionable deposits.
(B) Are Occur in amounts sufficient to be unsightly or deleterious.
(C) Produce:
(i) color;
(ii) visible oil sheen;
(iii) odor; or
(iv) other conditions;
in such degree as to create an extent that creates a nuisance.
(D) Are Occur in concentrations or combinations that will cause or contribute to the growth of aquatic plants or algae to such a degree as to:
(i) create a nuisance;
(ii) be unsightly; or
(iii) otherwise impair the designated uses of the surface waters.
(E) Are Occur in amounts sufficient to be acutely toxic to, or to otherwise severely injure or kill, aquatic life, other animals, plants, or humans. To assure ensure protection of aquatic life, concentrations of toxic substances shall must not exceed the final acute value (FAV = 2 (AAC)) in the undiluted discharge or the acute aquatic criterion (AAC) outside the zone of initial dilution or, if applicable, the zone of discharge-induced mixing. The following apply where applicable:
(i) For certain substances, an AAC is established and set forth specified in:
(AA) subdivision (3), Table 6-1;
(BB) subdivision (3), Table 6-2, which table incorporates subdivision (4), Table 6-3; and
(CC) subdivision (5).
(ii) for substances for which an AAC is not specified in subdivision (3), Table 6-1, subdivision (3), Table 6-2, or subdivision (5), An AAC can may be calculated by the commissioner using the procedures in section 8.2 of this rule and for substances for which an AAC is not specified in:
(AA) subdivision (3), Table 6-1;
(BB) subdivision (3), Table 6-2; or
(CC) subdivision (5).
(iii) The AAC determined under item (i) or (ii) may be modified on a site-specific basis to reflect local conditions in accordance with section 8.9 of this rule. This
(F) Clause shall (E) does not apply to the chemical control of plants and animals when that control is performed in compliance with approval conditions specified by the Indiana department of natural resources as provided by IC 14-22-9.
(2) At All times, all surface waters outside of mixing zones shall must be free of substances in concentrations that, on the basis of available scientific data, are believed to be sufficient to injure, be chronically toxic to, or be carcinogenic, mutagenic, or teratogenic to humans, animals, aquatic life, or plants. To assure protection against the adverse effects identified in this subdivision, The following requirements to ensure protection against the adverse effects identified in this subdivision are established: as follows:
(A) A toxic substance or pollutant shall must not be present in such surface waters outside of mixing zones in concentrations that exceed the most stringent of the following continuous criterion concentrations (CCCs):
(i) A chronic aquatic criterion (CAC) to protect aquatic life from chronic toxic effects.
(ii) A terrestrial life cycle safe concentration (TLSC) to protect terrestrial organisms from toxic effects that may result from the consumption of aquatic organisms or water from the waterbody.
(iii) A human life cycle safe concentration (HLSC) to protect human health from toxic effects that may result from the consumption of aquatic organisms or drinking water from the waterbody.
(iv) For carcinogenic substances, a criterion to protect human health from unacceptable cancer risk of greater than one (1) additional occurrence of cancer per one hundred thousand (100,000) population.
(B) For certain substances, one (1) or more of the CCCs identified in clause (A) are established and set forth specified in:
(i) subdivision (3), Table 6-1;
(ii) subdivision (3), Table 6-2, which table incorporates subdivision (4), Table 6-3;
(iii) subdivision (3), Table 6-2a; and
(iv) subdivision (5).
(C) For substances for which one (1) or more of the CCCs identified in clause (A) are not specified in subdivision (3), Table 6-1, subdivision (3), Table 6-2, or subdivision (5), such Criterion or criteria may be calculated by the commissioner using the corresponding procedures prescribed by sections 8.3 through 8.6 of this rule for substances for which one (1) or more of the CCCs identified in clause (A) are not specified in:
(i) subdivision (3), Table 6-1;
(ii) subdivision (3), Table 6-2;
(iii) subdivision (3), Table 6-2a; or
(iv) subdivision (5).
(D) A CCC determined under clause (B) or (C) may be modified on a site-specific basis to reflect local conditions in accordance with section 8.9 of this rule.
(E) The CAC and TLSC for a substance apply in all surface waters outside of a mixing zone for a discharge of that substance. Similarly,
(F) In surface waters where a public water system intake is not present or is unaffected by the discharge of a substance, the HLSC and the carcinogenic criterion for that substance based on consumption of organisms from the waterbody and only incidental ingestion of water shall apply to all surface waters outside of the mixing zone for a discharge of that substance.
(G) In surface waters where a public water system intake is present, the HLSC and the carcinogenic criterion for a substance based on consumption of organisms and potable water from the waterbody shall apply at the point of the public water system intake.
(3) The following establishes Surface water quality criteria for specific substances are as follows:
Table 6-1 
Surface Water Quality Criteria for Specific Substances 
AAC (Maximum)  CCC 
Substances  Outside of Mixing Zone  Point of Water Intake 
Aquatic Life (CAC) (4-Day Average)  Human Health (30-Day Average)  Human Health (30-Day Average) 
Metals (μg/l)         
(Total recoverable)         
Aluminum  #  #     
Antimony      45,000 640 (T)  146 5.6 (T) 
Arsenic (III)  0.175 (C)  0.022 (C) 
Barium        1,000 (D) 
Beryllium      1.17 (C)  0.068 (C) 
Cadmium  #  #    10 (D) 
Chromium (III)  #  #  3,433,000 (T)  170,000 (T) 
Chromium (VI)  #  #    50 (D) 
Copper    1,300(D) 
Lead  #  #    50 (D) 
Mercury$  2.4  0.012  0.15 (T)  0.14 (T) 
Nickel  100 4,600 (T)  13.4 610 (T) 
Selenium  130*  35 ##  4,200 (T)  10 (D) 170 (T) 
Silver      50 (D) 
Thallium      48 (T)  13 (T) 
Zinc  26,000 (T)  7,400(T) 
Organics (μg/l)         
Acrolein      780 (T)  320 (T) 
Acrylonitrile      6.5 (C)  0.58 (C) 
Aldrin$  1.5*    0.00079 (C)  0.00074 (C) 
Benzene      400 (C)  6.6 (C) 
Benzidine      0.0053 (C)  0.0012 (C) 
Carbon Tetrachloride      69.4 (C)  4.0 (C) 
Chlordane$  1.2*  0.0043  0.0048 (C)  0.0046 (C) 
Chlorinated Benzenes         
Monochlorobenzene        488 (T) 
1,2,4,5-Tetrachlorobenzene $      48 (T)  38 (T) 
Pentachlorobenzene $      85 (T)  74 (T) 
Hexachlorbenzene$      0.0074 (C)  0.0072 (C) 
Chlorinated Ethanes         
1,2-dichloroethane      2,430 (C)  9.4 (C) 
1,1,1-trichloroethane      1,030,000 (T)  18,400 (T) 
1,1,2-trichloroethane      418 (C)  6.0 (C) 
1,1,2,2-tetrachloroethane      107 (C)  1.7 (C) 
Hexachloroethane      87.4 (C)  19 (C) 
Chlorinated Phenols         
2,4,5-trichlorophenol        2,600 (T) 
2,4,6-trichlorophenol      36 (C)  12 (C) 
Chloroalkyl Ethers         
bis(2-chloroisopropyl) ether      4,360 (T)  34.7 (T) 
bis(chloromethyl) ether      0.018 (C)  0.000038 (C) 
bis(2-chloroethyl) ether      13.6 (C)  0.3 (C) 
Chloroform      157 (C)  1.9 (C) 
Chlorpyrifos  0.083  0.041     
DDT$  0.55*  0.0010  0.00024 (C)  0.00024 (C) 
Dichlorobenzenes      2,600 (T)  400 (T) 
Dichlorobenzidine      0.2 (C)  0.1 (C) 
1,1-dichloroethylene      18.5 (C)  0.33 (C) 
2,4-dichlorophenol        3,090 (T) 
Dichloropropenes      14,100 (T)  87 (T) 
Dieldrin$  1.3*  0.0019  0.00076 (C)  0.00071 (C) 
2,4-dinitrotoluene      91 (C)  1.1 (C) 
Dioxin (2,3,7,8-TCDD)$      0.0000001 (C)  0.0000001 (C) 
1,2-diphenylhydrazine      5.6 (C)  0.422 (C) 
Endosulfan  0.11*  0.056  159 (T)  74 (T) 
Endrin$  0.09*  0.0023    1.0 (D) 
Ethylbenzene      3,280 (T)  1,400 (T) 
Fluoranthene      54 (T)  42 (T) 
Halomethanes      157 (C)  1.9 (C) 
Heptachlor$  0.26*  0.0038  0.0028 (C)  0.0028 (C) 
Hexachlorobutadiene$      500 (C)  4.47 (C) 
Hexachlorocyclohexane (HCH)         
alpha HCH$      0.31 (C)  0.09 (C) 
beta HCH$      0.55 (C)  0.16 (C) 
gamma HCH (Lindane)$  1.0*  0.080  0.63 (C)  0.19 (C) 
Technical HCH$      0.41 (C)  0.12 (C) 
Hexachlorocyclopentadiene        206 (T) 
Isophorone      520,000 (T)  5,200 (T) 
Nitrobenzene        19,800 (T) 
Nitrophenols         
4,6-dinitro-o-cresol      765 (T)  13.4 (T) 
Dinitrophenol      14,300 (T)  70 (T) 
Nitrosamines         
N-nitrosodiethylamine      12.4 (C)  0.008 (C) 
N-nitrosodimethylamine      160 (C)  0.014 (C) 
N-nitrosodibutylamine      5.9 (C)  0.064 (C) 
N-nitrosodiphenylamine      161 (C)  49 (C) 
N-nitrosopyrrolidine      919 (C)  0.16 (C) 
Parathion  0.065  0.013     
Pentachlorophenol  e(1.005 [pH]-4.830)  e(1.005 [pH]-5.290)    1,000 (T) 
Phenol        3,500 (T) 
Phthalate Esters         
Dimethyl phthalate      2,900,000 (T)  313,000 (T) 
Diethyl phthalate      1,800,000 (T)  350,000 (T) 
Dibutyl phthalate      154,000 (T)  34,000 (T) 
Di-2-ethylhexyl phthalate      50,000 (T)  15,000 (T) 
Polychlorinated Biphenyls (PCBs)$    0.014  0.00079 (C)  0.00079 (C) 
Carcinogenic Polynuclear Aromatic Hydrocarbons (PAHs)      0.31 (C)  0.028 (C) 
Tetrachloroethylene      88.5 (C)  8 (C) 
Toluene      424,000 (T)  14,300 (T) 
Toxaphene$  0.73  0.0002  0.0073 (C)  0.0071 (C) 
Trichloroethylene      807 (C)  27 (C) 
Vinyl Chloride      5,246 (C)  20 (C) 
Other Substances         
Asbestos (fibers/liter)        300,000 (C) 
Chloride (mg/l)  **  **     
Chlorine         
(Total Residual) (μg/l)  19  11     
Chlorinea (mg/l)         
(intermittent, total residual)    0.2     
Cyanide (Free) (μg/l)  22  5.2     
Cyanide (Total) (μg/l)        200 (D) 
Nitrate-N + Nitrite-N (mg/l)        10 (D) 
Nitrite-N (mg/l)        1.0 (D) 
Fluoride shall must not exceed two (2.0) mg/l in all surface waters outside of the a mixing zone except the Ohio River and Interstate Wabash River where it shall must not exceed one (1.0) mg/l outside of the a mixing zone. 
Sulfate shall must not exceed the criteria established specified in subdivision (6) in all surface waters outside of the a mixing zone. 
#The AAC and CAC for this substance are established specified in Table 6-2.
## Selenium CAC are specified in Table 6-2a.
*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 IDEM 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.
**The AAC and CAC for this substance are established specified in subdivision (5).
T derived from threshold toxicity.
C derived from nonthreshold cancer risk.
D derived from drinking water standards, equal to or less than threshold toxicity.
$This substance is a bioaccumulative chemical of concern.
aTo be considered an intermittent discharge, total residual chlorine shall must not be detected in the discharge for a period of more than forty (40) minutes in duration, and such the periods shall must be separated by at least five (5) hours.
Table 6-2 
Surface Water Quality Criteria for Specific Substances Select Metals[1] 
Substances  AAC (Maximum) (μg/l)  AAC Conversion Factors  CAC (4-Day Average) (μg/l)  CAC Conversion Factors 
Metals (dissolved)[1]         
Aluminum (total recoverable)[2]  WER[3](e(1.3695 [ln(hardness)]+1.8308))    WER[3](e(1.3695 [ln(hardness)]+0.9161))   
Arsenic (III) (dissolved)[4]  WER[2][3] (360) (340)  1.000  WER[2][3] (190) (150)  1.000 
Cadmium (dissolved)[4]  WER[2][3](e(1.128 [ln(hardness)]-3.828)) (e(0.9789 [ln(hardness)]- 3.866))  1.136672-[(ln hardness) (0.041838)]  WER[2][3](e(0.7852 [ln(hardness)]-3.490)) (e(0.7977 [ln(hardness)]-3.909))  1.101672-[(ln hardness) (0.041838)] 
Chromium (III) (dissolved)[4]  WER[2][3](e(0.819 [ln(hardness)]+3.688)) (e(0.819 [ln(hardness)]+3.7256)  0.316  WER[2][3](e(0.8190 [ln(hardness)]+1.561)) (e(0.819 [ln(hardness)]+0.6848))  0.860 
Chromium (VI) (dissolved)[4]  WER[2][3](16)  0.982  WER[2][3](11)  0.962 
Copper (dissolved)[4]  WER[2][3](e(0.9422 [ln(hardness)]-1.464)) (e(0.9422 [ln(hardness)]-1.700))  0.960  WER[2][3](e(0.8545 [ln(hardness)]-1.465)) (e(0.8545 [ln(hardness)]-1.702))  0.960 
Lead (dissolved)[4]  WER[2][3](e(1.273 [ln(hardness)]-1.460)) (e(1.273 [ln(hardness)]-1.055))  1.46203-[(ln hardness) (0.145712)]  WER[2][3](e(1.273 [ln(hardness)]-4.705)) (e(1.273 [ln(hardness)]-3.557))  1.46203-[(ln hardness) (0.145712)] 
Nickel (dissolved)[4]  WER[2][3](e(0.8460 [ln(hardness)]+3.3612)) (e(0.846 [ln(hardness)]+2.255))  0.998  WER[2][3](e(0.8460 [ln(hardness)]+1.1645)) (e(0.846 [ln(hardness)]+0.0584))  0.997 
Silver (dissolved)[4]  WER[2][3](e(1.72 [ln(hardness)]-6.52)/2[3]) (e(1.72 [ln(hardness)]-6.59))  0.85     
Zinc (dissolved)[4]  WER[2][3](e(0.8473 [ln(hardness)]+0.8604)) (e(0.8473 [ln(hardness)]+0.884))  0.978  WER[2][3](e(0.8473 [ln(hardness)]+0.7614)) (e(0.8473 [ln(hardness)]+0.884))  0.986 
 
 
[1] The AAC and CAC columns of With the exception of aluminum, the hardness values used in the equations in this table contain total recoverable metals must be no greater than 400 mg/l calcium carbonate (CaCO3), and the criteria (numeric and hardness-based). The criterion for the dissolved metal is calculated by multiplying the appropriate conversion factor by the AAC or CAC. This dissolved at a hardness of 400 mg/l CaCO3 are used for water hardnesses above 400 mg/l CaCO3. For aluminum, the hardness values must be no greater than 220 mg/l CaCO3, and the criteria at a hardness of 220 mg/l CaCO3 are used for water hardnesses above 220 mg/l CaCO3. 
[2]Aluminum is expressed as total recoverable metal. The applicable pH range for determining the aluminum criterion is within 6.5 and 9.0. The total AAC or CAC shall 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][3]A value of one (1) shall must be used for the water-effect ratio (WER) unless an alternate value is established under section 8.9 of this rule. 
[3] One-half (1/2) of the FAV as calculated by procedures developed by U.S. EPA in 1980. This value would correspond to acute aquatic values calculated using IDEM procedures or U.S. EPA procedures developed in 1985 in which the calculated FAV is divided by two (2) to reduce acute toxicity. 
[4]Aquatic life criteria for these metals are expressed in terms of dissolved metal in the water column. The AAC and CAC columns of this table contain total recoverable metals criteria (numeric and hardness-based). The criterion for the dissolved metal is calculated by multiplying the appropriate conversion factor by the AAC or CAC. This dissolved AAC or 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 WQBELs. 
           
Table 6-2a 
Surface Water Quality Aquatic Life Criteria for Selenium 
CAC 
Fish Tissue (mg/kg dry weight)  Water Column (μg/L) 
Egg or ovary  Whole-body  Muscle (skinless, boneless filet)  Lentic aquatic systems  Lotic aquatic systems  Short term, intermittent lentic and lotic aquatic systems 
15.1[1,2]  8.5[2,3]  11.3[2,3]  1.5 (30 day)[4,5]  3.1 (30 day)[4,5]  Intermittent exposure equation[4,5,6,7] 
           
[1]Egg or ovary supersedes any whole-body, muscle, or water column element when fish egg or ovary concentrations are measured. Duration: Instantaneous measurement. 
[2]Frequency: Not to be exceeded. 
[3]Fish whole-body or muscle tissue supersedes water column element when both fish tissue and water concentrations are measured. Duration: Instantaneous measurement. 
[4]Water column values are based on dissolved total selenium in water (includes all oxidation states, for example, selenite, selenate, organic selenium, and any other forms) and are derived from fish tissue values via bioaccumulation modeling. 
[5]Frequency: Not to be exceeded more than once in three (3) years on average. 
[6]Intermittent Exposure Equation is as follows: 
  WQC30-day – Cbkgrnd (1 – fint)       
  fint       
           
Where:  WQC30-day is the water column monthly element for either lentic or lotic waters; 
  Cbkgrnd is the average background selenium concentration; and 
  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]Duration: Number of days per month with an elevated concentration. 
(4) The following establishes dissolved AAC and CAC for certain metals at selected hardness values calculated from the equations and conversion factors in subdivision (3), Table 6-2, and using a value of one (1) for the WER are as follows:
                         
Table 6-3 
Metals Concentrations in Micrograms Per Liter; Hardness in Milligrams Per Liter CaCO31 
  Aluminum (Total)  Arsenic (III) (Dissolved)  Cadmium (Dissolved)  Chromium (III) (Dissolved)  Chromium (VI) (Dissolved)  Copper (Dissolved) 
Hardness  AAC  CAC  AAC  CAC  AAC  CAC  AAC  CAC  AAC  CAC  AAC  CAC 
50  1,300  530  360 340  190 150  1.7 0.94  0.62 0.43  310 320  100 42  16  11  8.9 7.0  6.3 5.0 
100  3,400  1,400  360 340  190 150  3.7 1.8  1.0 0.72  550 570  180 74  16  11  17 13  11 9.0 
150  6,000  2,400  360 340  190 150  5.7 2.6  1.4 0.97  760 790  250 100  16  11  25 20  16 13 
200  8,800  3,500  360 340  190 150  7.8 3.4  1.7 1.2  970 1,000  310 130  16  11  33 26  21 16 
250  10,000  4,000  360 340  190 150  10 4.2  2.0 1.4  1200  380 160  16  11  40 32  25 20 
300  10,000  4,000  360 340  190 150  12 5.0  2.3 1.6  1300 1,400  440 180  16  11  48 38  29 23 
350  10,000  4,000  360 340  190 150  14 5.8  2.6 1.8  1500 1,600  500 210  16  11  55 44  33 26 
400  10,000  4,000  360 340  190 150  17 6.5  2.9 2.0  1700 1,800  550 230  16  11  63 50  37 29 
450      360  190  19  3.1  1900  610  16  11  70  41 
500      360  190  21  3.4  2100  670  16  11  78  45 
                         
                         
  Lead (Dissolved)  Nickel (Dissolved)  Silver (Dissolved)  Zinc (Dissolved)         
Hardness  AAC  CAC  AAC  CAC  AAC  CAC  AAC  CAC         
50  30 45  1.2 3.7  790 260  87 29  0.52 0.98  --  64 65  58 66         
100  65 97  2.5 7.9  1400 470  160 52  1.7 3.2  --  110 120  100 120         
150  100 150  3.9 12  2000 660  220 73  3.5 6.5  --  160 170  150 170         
200  140 200  5.3 17  25000 840  280 93  5.7 11  --  210  190 210         
250  170 260  6.7 21  3100 1,000  340 110  8.3 16  --  250  230 260         
300  210 310  8.1 26  3600 1,200  400 130  11 21  --  290 300  270 300         
350  240 370  9.5 30  4100 1,400  450 150  15 28  --  330 340  300 340         
400  280 420  11 34  4600 1,500  510 170  19 35  --  370 380  340 380         
450  320  12  5100  560  23  --  410  370         
500  350  14  5500  610  27  --  450  410         
[1] The dissolved metals criteria in this table have been rounded to two (2) significant digits in accordance with subdivision (3), Table 6-2. The equations and conversion factors in subdivision (3), Table 6-2 shall must be used instead of the criteria in this table when dissolved metals these criteria are used as intermediate values in a calculation, such as in the calculation of WQBELs. 
(5) The following establishes Surface water quality criteria for chloride for protection of aquatic life are as follows:
(A) The following provides the AAC 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:
C = 287.8 (hardness)0.205797 (sulfate)-0.07452
Where: C = chloride AAC (maximum) in mg/l.
(B) The following provides the CAC 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:
C = 177.87 (hardness)0.205797 (sulfate)-0.07452
Where: C = chloride CAC (4-day average) in mg/l.
(C) The following This clause applies to the AAC and CAC for chloride provided in this subdivision, as follows:
(i) Chloride criteria may only be established based on a sulfate concentration greater than the water quality criterion for sulfate, as established under subdivision (6), where the water quality criterion for sulfate has been modified on a site-specific basis in accordance with either the:
(AA) variance provisions under section 8.8 of this rule; or the
(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 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 AAC for chloride in mg/l at selected concentrations of hardness 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 shown in the following table:
                       
Table 6-3a[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 clause when chloride criteria are used as intermediate values in a calculation, such as in the calculation of WQBELs. 
(E) The following establishes the CAC for chloride in mg/l at selected concentrations of hardness 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 shown in the following table:
                       
Table 6-3b[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 clause 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 sulfate that shall must not be exceeded in all any surface waters water outside of the a mixing zone are as follows:
(A) The following provides surface water quality criteria for sulfate in mg/l for the specified ranges of hardness (in mg/l as CaCO3) or chloride (in mg/l), or both, are as follows:
(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:
C = [-57.478 + 5.79 (hardness) + 54.163 (chloride)] × 0.65
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:
C = [1276.7 + 5.508 (hardness) - 1.457 (chloride)] × 0.65
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 shall be is calculated using a hardness concentration of five hundred (500) mg/l and the equation in item (i) or (ii) that applies to the chloride concentration.
(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) The following This clause applies to the surface water quality criteria for sulfate provided in clause (A), as follows:
(i) Sulfate criteria may only be established based on a chloride concentration greater than the CAC for chloride established under subdivision (5) where the CAC for chloride has been modified on a site-specific basis in accordance with either the:
(AA) variance provisions under section 8.8 of this rule; or the
(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) 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.
(C) The following establishes surface water quality criteria for sulfate in mg/l at selected concentrations of hardness and chloride with the understanding that the equations in clause (A) shall be used instead of the criteria in this clause when sulfate criteria are used as intermediate values in a calculation, such as in the calculation of WQBELs: shown in the following table:
                       
Table 6-3c[1] 
Hardness (mg/l) 
Chloride (mg/l)  <100  100  150  200  250  300  350  400  450  500  >500 
<5  500  500  500  500  500  500  500  500  500  500  500 
500  515  703  891  1080  1268  1456  1644  1832  2020  2020 
10  500  691  879  1067  1256  1444  1632  1820  2008  2196  2196 
15  500  867  1055  1243  1432  1620  1808  1996  2184  2372  2372 
20  500  1043  1231  1419  1608  1796  1984  2172  2360  2549  2549 
25  500  1164  1343  1522  1701  1880  2059  2238  2417  2596  2596 
50  500  1141  1320  1499  1678  1857  2036  2215  2394  2573  2573 
100  500  1093  1272  1451  1630  1809  1988  2167  2346  2525  2525 
150  500  1046  1225  1404  1583  1762  1941  2120  2299  2478  2478 
200  500  998  1177  1356  1535  1715  1894  2073  2252  2431  2431 
250  500  951  1130  1309  1488  1667  1846  2025  2204  2383  2383 
[1]The equations in clause (A) must be used instead of the criteria in this clause when sulfate criteria are used as intermediate values in a calculation, such as in the calculation of WQBELs. 

(b) This subsection establishes minimum surface water quality for aquatic life. In addition to subsection (a), subdivisions (1) through (5) are established to ensure the following minimum conditions necessary for the maintenance of a well-balanced aquatic community The following are applicable at any point in the surface waters outside of the a mixing zone 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.
shall be permitted.
(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) The maximum temperature rise at any time or place above natural temperatures shall must not exceed:
(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 shall must not exceed the maximum limits in the following Table 6-4 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 the locations must not exceed the maximum limits in the following table by more than three (3) degrees Fahrenheit (one and seven-tenths (1.7) degrees Celsius):
         
  Table 6-4   
    Ohio River Main Stem °F(°C)  Other Indiana Streams °F(°C)   
  January  50 (10.0)  50 (10.0)   
  February  50 (10.0)  50 (10.0)   
  March  60 (15.6)  60 (15.6)   
  April  70 (21.1)  70 (21.1)   
  May  80 (26.7)  80 (26.7)   
  June  87 (30.6)  90 (32.2)   
  July  89 (31.7)  90 (32.2)   
  August  89 (31.7)  90 (32.2)   
  September  87 (30.7)  90 (32.2)   
  October  78 (25.6)  78 (25.5)   
  November  70 (21.1)  70 (21.1)   
  December  57 (14.0)  57 (14.0)   
(5) The following criteria will must be used to regulate ammonia:
(A) Except for waters covered in clause (B), at all times, all surface waters outside of mixing zones shall must be free of substances in concentrations that, on the basis of available scientific data, are believed to be sufficient to (i) injure, (ii) be chronically toxic to, or (iii) be carcinogenic, mutagenic, or teratogenic to:
(i) humans;
(ii) animals;
(iii) aquatic life; or
(iv) plants.
(B) For those waters listed in subsection (c), the following ammonia criteria will apply outside the of a mixing zone:
               
Table 6-5 
Maximum Ammonia Concentrations (Unionized Ammonia as N)*** 
(mg/l) Temperature (°C) 
pH  10  15  20  25  30 
6.5  0.0075  0.0106  0.0150  0.0211  0.0299  0.0299  0.0299 
6.6  0.0092  0.0130  0.0183  0.0259  0.0365  0.0365  0.0365 
6.7  0.0112  0.0158  0.0223  0.0315  0.0444  0.0444  0.0444 
6.8  0.0135  0.0190  0.0269  0.0380  0.0536  0.0536  0.0536 
6.9  0.0161  0.0228  0.0322  0.0454  0.0642  0.0642  0.0642 
7.0  0.0191  0.0270  0.0381  0.0539  0.0761  0.0761  0.0761 
7.1  0.0244  0.0316  0.0447  0.0631  0.0892  0.0892  0.0892 
7.2  0.0260  0.0367  0.0518  0.0732  0.1034  0.1034  0.1034 
7.3  0.0297  0.0420  0.0593  0.0837  0.1183  0.1183  0.1183 
7.4  0.0336  0.0474  0.0669  0.0946  0.1336  0.1336  0.1336 
7.5  0.0374  0.0528  0.0746  0.1054  0.1489  0.1489  0.1489 
7.6  0.0411  0.0581  0.0821  0.1160  0.1638  0.1638  0.1638 
7.7  0.0447  0.0631  0.0892  0.1260  0.1780  0.1780  0.1780 
7.8  0.0480  0.0678  0.0958  0.1353  0.1911  0.1911  0.1911 
7.9  0.0510  0.0720  0.1017  0.1437  0.2030  0.2030  0.2030 
8.0  0.0536  0.0758  0.1070  0.1512  0.2135  0.2135  0.2135 
8.1  0.0537  0.0758  0.1071  0.1513  0.2137  0.2137  0.2137 
8.2  0.0537  0.0758  0.1071  0.1513  0.2137  0.2137  0.2137 
8.3  0.0537  0.0758  0.1071  0.1513  0.2137  0.2137  0.2137 
8.4  0.0537  0.0758  0.1071  0.1513  0.2137  0.2137  0.2137 
8.5  0.0537  0.0758  0.1071  0.1513  0.2137  0.2137  0.2137 
8.6  0.0537  0.0758  0.1071  0.1513  0.2137  0.2137  0.2137 
8.7  0.0537  0.0758  0.1071  0.1513  0.2137  0.2137  0.2137 
8.8  0.0537  0.0758  0.1071  0.1513  0.2137  0.2137  0.2137 
8.9  0.0537  0.0758  0.1071  0.1513  0.2137  0.2137  0.2137 
9.0  0.0537  0.0758  0.1071  0.1513  0.2137  0.2137  0.2137 
***To calculate total ammonia, divide the number in the Table 6-5 by the value determined by: 1/(10pK a -pH + 1). 
Where:  pKa  0.09018 + (2729.92/(T + 273.2)) 
  pH  pH of water 
  °C 
               
Table 6-6 
24-Hour Average Ammonia Concentrations (Unionized Ammonia as N)*** 
(mg/l) Temperature (°C) 
pH  10  15  20  25  30 
6.5  0.0005  0.0008  0.0011  0.0015  0.0015  0.0015  0.0015 
6.6  0.0007  0.0010  0.0014  0.0019  0.0019  0.0019  0.0019 
6.7  0.0009  0.0012  0.0017  0.0024  0.0024  0.0024  0.0024 
6.8  0.0011  0.0015  0.0022  0.0031  0.0031  0.0031  0.0031 
6.9  0.0014  0.0019  0.0027  0.0038  0.0038  0.0038  0.0038 
7.0  0.0017  0.0024  0.0034  0.0048  0.0048  0.0048  0.0048 
7.1  0.0022  0.0031  0.0043  0.0061  0.0061  0.0061  0.0061 
7.2  0.0027  0.0038  0.0054  0.0077  0.0077  0.0077  0.0077 
7.3  0.0034  0.0048  0.0068  0.0097  0.0097  0.0097  0.0097 
7.4  0.0043  0.0061  0.0086  0.0122  0.0122  0.0122  0.0122 
7.5  0.0054  0.0077  0.0108  0.0153  0.0153  0.0153  0.0153 
7.6  0.0068  0.0097  0.0136  0.0193  0.0193  0.0193  0.0193 
7.7  0.0086  0.0122  0.0172  0.0242  0.0242  0.0242  0.0242 
7.8  0.0092  0.0130  0.0184  0.0260  0.0260  0.0260  0.0260 
7.9  0.0098  0.0138  0.0196  0.0276  0.0276  0.0276  0.0276 
8.0  0.0103  0.0146  0.0206  0.0294  0.0294  0.0294  0.0294 
8.1  0.0103  0.0146  0.0206  0.0294  0.0294  0.0294  0.0294 
8.2  0.0103  0.0146  0.0206  0.0294  0.0294  0.0294  0.0294 
8.3  0.0103  0.0146  0.0206  0.0294  0.0294  0.0294  0.0294 
8.4  0.0103  0.0146  0.0206  0.0294  0.0294  0.0294  0.0294 
8.5  0.0103  0.0146  0.0206  0.0294  0.0294  0.0294  0.0294 
8.6  0.0103  0.0146  0.0206  0.0294  0.0294  0.0294  0.0294 
8.7  0.0103  0.0146  0.0206  0.0294  0.0294  0.0294  0.0294 
8.8  0.0103  0.0146  0.0206  0.0294  0.0294  0.0294  0.0294 
8.9  0.0103  0.0146  0.0206  0.0294  0.0294  0.0294  0.0294 
9.0  0.0103  0.0146  0.0206  0.0294  0.0294  0.0294  0.0294 
***To calculate total ammonia, divide the number in the Table 6-6 by the value determined by: 1/(10pK a -pH + 1). 
Where:  pKa  0.09018 + (2729.92/(T + 273.2)) 
  pH  pH of water 
  °C 

(c) This subsection establishes surface water quality Waters designated by the Indiana department of natural resources for put-and-take trout fishing are designated as salmonid waters and must be protected for cold-water fish. In addition to subsections (a) and (b), 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 surface waters outside of the a mixing zone to ensure conditions necessary for the maintenance of a well-balanced, cold-water fish community:
(1) Waters:
(A) designated as salmonid waters; and
(B) that shall be protected for cold-water fish;
are those waters designated by the Indiana department of natural resources for put-and-take trout fishing.
(2) In the waters listed in subdivision (1),
(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.
(3) In those waters listed in subdivision (1), (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 and imprinting periods.

(d) 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 (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 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) 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) 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.

(e) This subsection establishes surface water quality for public water supply. In addition to subsections (a) and (d), 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 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 must not exceed ten (10) milligrams per liter; and
(B) concentration of nitrite-N must not exceed one (1) milligram per liter.
(6) (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.

(f) This subsection establishes surface water quality for industrial water supply. In addition to subsection (a), 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.

(g) 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 (a).

(h) This subsection establishes surface water quality for limited uses. The quality of surface waters classified designated for limited uses under section 3(a)(5) 11(a) of this rule shall, must, at a minimum, meet the following criteria (1) The criteria contained in subsection subsections (a), (2) The criteria contained in subsection (d), (3) The criteria contained in subsection (f), and where applicable, (4) The waters must subsection (f), 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.
(Water Pollution Control Division; 327 IAC 2-1-6; filed Sep 24, 1987, 3:00 p.m.: 11 IR 581; filed Feb 1, 1990, 4:30 p.m.: 13 IR 1020; errata, 13 IR 1861; errata filed Jul 6, 1990, 5:00 p.m.: 13 IR 2003; filed Feb 26, 1993, 5:00 p.m.: 16 IR 1725; errata filed May 7, 1993, 4:00 p.m.: 16 IR 2189; filed Jan 14, 1997, 12:00 p.m.: 20 IR 1348; errata filed Aug 11, 1997, 4:15 p.m.: 20 IR 3376; filed Feb 14, 2005, 10:05 a.m.: 28 IR 2047; errata filed Apr 6, 2006, 2:48 p.m.: 29 IR 2546; errata, 29 IR 3027; filed Mar 18, 2008, 2:26 p.m.: 20080416-IR-327060573FRA; filed May 22, 2008, 10:40 a.m.: 20080618-IR-327070185FRA; filed Jul 9, 2012, 2:54 p.m.: 20120808-IR-327110320FRA; filed Nov 10, 2014, 1:51 p.m.: 20141210-IR-327130290FRA)


SECTION 2. 327 IAC 2-1.5-8 IS AMENDED TO READ AS FOLLOWS:

327 IAC 2-1.5-8 Minimum surface water quality criteria

Authority: IC 13-14-8-2; IC 13-14-8-3; IC 13-18-4-3

Sec. 8. (a) All surface water quality criteria in this section, except those provided in subsection (b)(1), will cease to be are not applicable when the stream flows are less than the applicable stream design flow for the particular criterion as determined under 327 IAC 5-2-11.4.

(b) The following are minimum surface water quality conditions:
(1) All surface waters within the Great Lakes system, at all times, and at all places, including waters within the a mixing zone, shall meet the minimum conditions of being must be free from substances, materials, floating debris, oil, or scum attributable to municipal, industrial, agricultural, and other land use practices, or other discharges that do any of the following:
(A) Will Settle to form putrescent or otherwise objectionable deposits.
(B) Are Occur in amounts sufficient to be unsightly or deleterious.
(C) Produce:
(i) color;
(ii) visible oil sheen;
(iii) odor; or
(iv) other conditions;
in such degree as to create an extent that creates a nuisance.
(D) Are Occur in concentrations or combinations that will cause or contribute to the growth of aquatic plants or algae to such a degree as to:
(i) create a nuisance;
(ii) be unsightly; or
(iii) otherwise impair the designated uses of the surface waters.
(E) Are Occur in amounts sufficient to be acutely toxic to, or to otherwise severely injure or kill, aquatic life, other animals, plants, or humans. To assure ensure protection of aquatic life, the surface waters shall must meet the following requirements:
(i) Concentrations of toxic substances shall must not exceed the CMC or SMC outside the zone of initial dilution or the final acute value (FAV = 2 (CMC) or 2 (SMC)) 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 or SMC shall must be met outside the applicable alternate mixing zone. The following apply where applicable:
(AA) For certain substances, a CMC is established and set forth specified in:
(aa) subdivision (3), Table 8-1, which table incorporates subdivision (4), Table 8-2; and
(bb) subdivision (5).
(BB) For substances for which a CMC is not specified in subdivision (3), Table 8-1, or subdivision (5):
(aa) a CMC shall must be calculated by the commissioner using the procedures in section 11 of this rule; or
(bb) if the minimum data requirements to calculate a CMC are not met, an SMC shall must be calculated using the procedures in section 12 of this rule. and
(CC) The CMC or SMC determined under subitem (AA) or (BB) may be modified on a site-specific basis to reflect local conditions in accordance with section 16 of this rule.
(ii) A discharge shall must not cause acute toxicity, as measured by whole effluent toxicity tests, at any point in the waterbody. Compliance with this criterion shall be is demonstrated if a discharge does not exceed one and zero-tenths (1.0) TUa in the undiluted discharge. For a discharge into a receiving stream or Lake Michigan, for which an alternate mixing zone demonstration is conducted and approved in accordance with 327 IAC 5-2-11.4(b)(4), compliance with this criterion shall be is demonstrated if three-tenths (0.3) TUa is not exceeded outside the applicable alternate mixing zone. This
(F) Clause shall (E) does not apply to the chemical control of plants and animals when that control is performed in compliance with approval conditions specified by the Indiana department of natural resources as provided by IC 14-22-9.
(2) At All times, all surface waters outside of the applicable mixing zones determined in accordance with section 7 of this rule shall must be free of substances in concentrations that, on the basis of available scientific data, are believed to be sufficient to injure, be chronically toxic to, or be carcinogenic, mutagenic, or teratogenic to humans, animals, aquatic life, or plants. To assure ensure protection against the adverse effects identified in this subdivision, a toxic substance or pollutant shall must not be present in such surface waters outside of the applicable mixing zones determined in accordance with section 7 of this rule in concentrations that exceed the most stringent of the following:
(A) A CCC or an SCC to protect aquatic life from chronic toxic effects as follows:
(i) For certain substances, a CCC is established and set forth specified in:
(AA) subdivision (3), Table 8-1, which table incorporates subdivision (4), Table 8-2;
(BB) subdivision (3), Table 8-1a; and
(CC) subdivision (5).
(ii) For substances for which a CCC is not specified in subdivision (3), Table 8-1 or Table 8-1a, or subdivision (5):
(AA) a CCC shall must be calculated by the commissioner using the procedures in section 11 of this rule; or
(BB) if the minimum data requirements to calculate a CCC are not met, an SCC shall must be calculated using the procedures in section 12 of this rule.
(iii) The CCC or SCC determined under item (i) or (ii) may be modified on a site-specific basis to reflect local conditions in accordance with section 16 of this rule.
(iv) To assure ensure protection of aquatic life, a discharge shall must not cause chronic toxicity, as measured by whole effluent toxicity tests, outside of the applicable mixing zone. Compliance with this criterion shall be is demonstrated if the waterbody does not exceed one and zero-tenths (1.0) TUc at the edge of the mixing zone.
(B) An HNC or HNV to protect human health from adverse noncancer effects that may result from the consumption of aquatic organisms or drinking water from the waterbody determined as follows:
(i) For certain substances, an HNC is established and set forth specified in subdivision (6), Table 8-3.
(ii) For substances for which an HNC is not specified in subdivision (6), Table 8-3:
(AA) an HNC shall must be calculated by the commissioner using the procedures in section 14 of this rule; or
(BB) if the minimum data requirements to calculate an HNC are not met, an HNV shall must be calculated using the procedures in section 14 of this rule.
(iii) The HNC or HNV determined under item (i) or (ii) may be modified on a site-specific basis to reflect local conditions in accordance with section 16 of this rule.
(iv) The HNC for nondrinking water or HNV for nondrinking water for a substance shall apply applies to all surface waters outside the applicable mixing zone for a discharge of that substance. The HNC for drinking water or HNV for drinking shall apply water for a substance applies at the point of the public water system intake.
(C) For carcinogenic substances, an HCC or HCV to protect human health from unacceptable cancer risk of greater than one (1) additional occurrence of cancer per one hundred thousand (100,000) population as follows:
(i) For certain substances, an HCC is established and set forth specified in subdivision (6), Table 8-3.
(ii) For substances for which an HCC is not specified in subdivision (6), Table 8-3:
(AA) an HCC shall must be calculated by the commissioner using the procedures in section 14 of this rule; or
(BB) if the minimum data requirements to calculate an HCC are not met, an HCV shall must be calculated using the procedures in section 14 of this rule.
(iii) The HCC or HCV determined under item (i) or (ii) may be modified on a site-specific basis to reflect local conditions in accordance with section 16 of this rule.
(iv) The HCC for nondrinking water or HCV for nondrinking water for a substance shall apply applies to all surface waters outside the applicable mixing zone for a discharge of that substance. The HCC for drinking water or HCV for drinking shall apply water applies at the point of the public water system intake.
(D) A WC to protect avian and mammalian wildlife populations from adverse effects that may result from the consumption of aquatic organisms or water from the waterbody as follows:
(i) For certain substances, a WC is established and set forth specified in subdivision (7), Table 8-4.
(ii) For substances for which a WC is not specified in subdivision (7), Table 8-4:
(AA) a WC shall must be calculated by the commissioner using the procedures in section 15 of this rule; or
(BB) if the minimum data requirements to calculate a WC are not met, a WV may be calculated using the procedures in section 15 of this rule.
(iii) The WC or WV determined under item (i) or (ii) may be modified on a site-specific basis to reflect local conditions in accordance with section 16 of this rule.
(3) The following establishes Surface water quality criteria for protection of aquatic life are as follows:
 
Table 8-1 
Surface Water Quality Criteria for Protection of Aquatic Life[1][2] 
CAS Number  Substances  CMC (Maximum) (μg/l)  CMC Conversion Factors  CCC (4-Day Average) (μg/l)  CCC Conversion Factors 
  Metals (dissolved)[2]         
7429905    Aluminum (total recoverable[3]  WER[4](e(1.3695 [ln(hardness)]+1.8308))    WER[4](e(1.3695 [ln(hardness)]+0.9161))   
7440382    Arsenic (III) (dissolved)[5]  WER[3][4](339.8) (340)  1.000  WER[3][4] (147.9) (150)  1.000 
7440439    Cadmium (dissolved)[5]  WER[3][4](e(1.128 [ln(hardness)]-3.6867)) (e(0.9789 [ln(hardness)]-3.866))  1.136672-[(ln hardness) (0.041838)]  WER[3][4](e(0.7852 [ln(hardness)]-2.715)) (e(0.7977 [ln(hardness)]-3.909))  1.101672-[(ln hardness) (0.041838)] 
7440473    Chromium (III) (dissolved)[5]  WER[3][4](e(0.819 [ln(hardness)]+3.7256) 0.316  WER[3][4](e(0.819 [ln(hardness)]+0.6848) 0.860 
7440473    Chromium (VI) (dissolved)[5]  WER[3][4](16.02) (16)  0.982  WER[3][4](10.98) (11)  0.962 
7440508    Copper (dissolved)[5]  WER[3][4](e(0.9422 [ln(hardness)]-1.700) 0.960  WER[3][4](e(0.8545 [ln(hardness)]-1.702) 0.960 
7439921    Lead (dissolved)[5]  WER[4](e(1.273 [ln(hardness)]-1.055))  1.46203-[(ln hardness) (0.145712)]  WER[4](e(1.273 [ln(hardness)]-3.557))  1.46203-[(ln hardness) (0.145712)] 
7439976    Mercury (dissolved)[5]  WER[3][4](1.694)  0.85  WER[3][4] (0.9081)  0.85 
7440020    Nickel (dissolved)[5]  WER[3][4](e(0.846 [ln(hardness)]+2.255) 0.998  WER[3][4](e(0.846 [ln(hardness)]+0.0584) 0.997 
7782492    Selenium (dissolved)      5 Table 8-1a  0.922 
7440666    Zinc (dissolved)[5]  WER[3][4](e(0.8473 [ln(hardness)]+0.884) 0.978  WER[3][4](e(0.8473 [ln(hardness)]+0.884) 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][6]  e(1.005[pH]-4.869)  NA  e(1.005[pH]-5.134)  NA 
  Other Substances         
    Chloride  [6][7]  NA  [6][7]  NA 
    Chlorine (total residual)  19  NA  11  NA 
    Chlorine (intermittent, total residual)[5][8]  200  NA    NA 
57125    Cyanide (free)  22  NA  5.2  NA 
[1] Aquatic organisms should not be affected unacceptably if the four (4) day average concentration of any substance in this table 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]With the exception of aluminum, the hardness values used in the equations in this table must be no greater than 400 mg/l calcium carbonate (CaCO3), and the criteria at a hardness of 400 mg/l CaCO3 are used for water hardnesses above 400 mg/l CaCO3. For aluminum, the hardness values must be no greater than 220 mg/l CaCO3, and the criteria at a hardness of 220 mg/l CaCO3 are used for water hardnesses above 220 mg/l CaCO3. 
[2] The CMC and CCC columns of this table contain total recoverable metals criteria (numeric and hardness-based). The criterion for the dissolved metal is calculated by multiplying the appropriate conversion factor by the CMC or CCC. This dissolved 
[3]Aluminum is expressed as total recoverable metal. The applicable pH range for determining the aluminum criterion is within 6.5 and 9.0. The total CMC or CCC shall 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][4]A value of one (1) shall must be used for the WER unless an alternate value is established under section 16 of this rule. 
[5] Aquatic life criteria for these metals are expressed in terms of dissolved metal in the water column. The CMC and CCC columns of this table contain total recoverable metals criteria (numeric and hardness-based). The criterion for the dissolved metal is calculated by multiplying the appropriate conversion factor by the CMC or CCC. This dissolved CMC or 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 WQBELs. 
[4][6] A CMC and CCC calculated for pentachlorophenol using the equation in this table shall 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 shall not be detected in the discharge for a period of more than forty (40) minutes in duration, and such periods shall be separated by at least five (5) hours. 
[6][7]The CMC and CCC for this substance are established specified in subdivision (5). 
[8] 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 the periods must be separated by at least five (5) hours. 
           
 
Table 8-1a 
CCC 
Fish Tissue (mg/kg dry weight)  Water Column (μg/L) 
Egg or ovary  Whole-body  Muscle (skinless, boneless filet)  Lentic aquatic systems  Lotic aquatic systems  Short term, intermittent lentic and lotic aquatic systems 
15.1[1,2]  8.5[2,3]  11.3[2,3]  1.5 (30 day)[4,5]  3.1 (30 day)[4,5]  Intermittent exposure equation[4,5,6,7] 
           
[1]Egg or ovary supersedes any whole-body, muscle, or water column element when fish egg or ovary concentrations are measured. Duration: Instantaneous measurement. 
[2]Frequency: Not to be exceeded. 
[3]Fish whole-body or muscle tissue supersedes water column element when both fish tissue and water concentrations are measured. Duration: Instantaneous measurement. 
[4]Water column values are based on dissolved total selenium in water (includes all oxidation states, for example, selenite, selenate, organic selenium, and any other forms) and are derived from fish tissue values via bioaccumulation modeling. 
[5]Frequency: Not to be exceeded more than once in three (3) years on average. 
[6]Intermittent Exposure Equation is as follows: 
  WQC30-day – Cbkgrnd (1 – fint)       
  fint       
Where:  WQC30-day is the water column monthly element for either lentic or lotic waters; 
  Cbkgrnd is the average background selenium concentration; and 
  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]Duration: Number of days per month with an elevated concentration. 
(4) The following establishes dissolved The CMCs and CCCs for certain metals at selected hardness values calculated from the equations and conversion factors in subdivision (3), Table 8-1 and using a value of one (1) for the WER, where applicable, are as follows:
                         
Table 8-2 
Metals Concentrations in Micrograms Per Liter; Hardness in Milligrams Per Liter CaCO3[1] 
  Aluminum (Total)  Arsenic (III) (Dissolved)  Cadmium (Dissolved)  Chromium (III) (Dissolved)  Chromium (VI) (Dissolved)  Copper (Dissolved) 
Hardness  CMC  CCC  CMC  CCC  CMC  CCC  CMC  CCC  CMC  CCC  CMC  CCC 
50  1,300  530  340  150  2.0 0.94  1.3 0.43  320  42  16  11  7.0  5.0 
100  3,400  1,400  340  150  4.3 1.8  2.2 0.72  570  74  16  11  13  9.0 
150  6,000  2,400  340  150  6.6 2.6  3.0 0.97  790  100  16  11  20  13 
200  8,800  3,500  340  150  9.0 3.4  3.7 1.2  1,000  130  16  11  26  16 
250  10,000  4,000  340  150  12 4.2  4.4 1.4  1,200  160  16  11  32  20 
300  10,000  4,000  340  150  14 5.0  5.0 1.6  1,400  180  16  11  38  23 
350  10,000  4,000  340  150  17 5.8  5.6 1.8  1,600  210  16  11  44  26 
400  10,000  4,000  340  150  19 6.5  6.2 2.0  1,800  230  16  11  50  29 
450      340  150  22  6.8  2,000  250  16  11  55  32 
500      340  150  24  7.3  2,100  280  16  11  61  35 
                         
  Lead (Dissolved)  Mercury (Dissolved)  Nickel (Dissolved)  Selenium  Zinc (Dissolved)     
Hardness  CMC  CCC  CMC  CCC  CMC  CCC  CMC  CCC  CMC  CCC     
50  45  3.7  1.4  0.77  260  29  –  4.6  65  66     
100  97  7.9  1.4  0.77  470  52  –  4.6  120  120     
150  150  12  1.4  0.77  660  73  –  4.6  170  170     
200  200  17  1.4  0.77  840  93  –  4.6  210  210     
250  260  21  1.4  0.77  1,000  110  –  4.6  250  260     
300  310  26  1.4  0.77  1,200  130  –  4.6  300  300     
350  370  30  1.4  0.77  1,400  150  –  4.6  340  340     
400  420  34  1.4  0.77  1,500  170  –  4.6  380  380     
450     1.4  0.77  1,700  190    4.6  420  420     
500      1.4  0.77  1,800  200    4.6  460  460     
[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 shall must be used instead of the criteria in this table when dissolved metals these criteria are used as intermediate values in a calculation, such as in the calculation of WQBELs. 
(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:
C = 287.8 (hardness)0.205797 (sulfate)-0.07452
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:
C = 177.87 (hardness)0.205797 (sulfate)-0.07452
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 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 shown in the following table:
                       
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 clause 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 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 shown in the following table:
                       
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 clause 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  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.
shall be permitted.
(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 8-5 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 the locations must not exceed the maximum limits in the following table 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 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 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 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:
327140058SN02.jpg
           
Where:  FT  100.03(20-T) 
  FPH  1; when: 8 < pH < 9; or 
      1 + 10(7.4 - pH)  ; when: 6.5 < pH <
      1.25 
  pKa  0.09018 +  2729   
  T + 273.2   
  Temperature in °C 
(B) The CCC of total ammonia (as N) is determined using the following equation:
327140058SN01.jpg
           
Where:  FT  100.03(20-T) 
  FPH  1; when: 8 < pH < 9; or 
      1 + 10(7.4 - pH)  ; when: 6.5 < pH <
      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   
  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  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  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 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 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, 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 shall must not be less than seven (7.0) milligrams per liter at any time at all places outside the applicable mixing zone. 
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. shall be permitted. 
Chloride  250 mg/l[1] 
Phenols  See The criteria in subsection (c)(1) 
Sulfate  250 mg/l[1] 
Total phosphorus  See The requirements in 327 IAC 5-10-2 
Total dissolved solids  750 mg/l[1] 
Fluoride  1.0 mg/l[1] 
Dissolved iron  300 μg/l[1] 
[1] This criterion is established to minimize or prevent minimizes or prevents increased levels of this substance in Lake Michigan. For the purposes of establishing water quality-based effluent limitations based on this criterion, it shall must be treated as a four (4) day average 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   
(Water Pollution Control Division; 327 IAC 2-1.5-8; filed Jan 14, 1997, 12:00 p.m.: 20 IR 1370; errata filed Aug 11, 1997, 4:15 p.m.: 20 IR 3376; filed Feb 14, 2005, 10:05 a.m.: 28 IR 2074; errata filed Apr 6, 2006, 2:48 p.m.: 29 IR 2546; filed Mar 18, 2008, 2:26 p.m.: 20080416-IR-327060573FRA; filed Jul 9, 2012, 2:54 p.m.: 20120808-IR-327110320FRA)


Posted: 11/15/2017 by Legislative Services Agency

DIN: 20171115-IR-327140058SNA
Composed: Nov 30,2020 6:43:10PM EST
A PDF version of this document.