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

TITLE 327 WATER POLLUTION CONTROL BOARD

Final Rule
LSA Document #07-185(F)

DIGEST

Amends 327 IAC 2-1-6 concerning amendments to the sulfate criterion. Effective 30 days after filing with the Publisher.


HISTORY
First Notice of Comment Period: March 28, 2007, Indiana Register (DIN: 20070328-IR-327070185FNA).
Second Notice of Comment Period: November 14, 2007, Indiana Register (DIN: 20071114-IR-327070185SNA).
Notice of Public Hearing: November 14, 2007, Indiana Register (DIN: 20071114-IR-327070185PHA).
Date of First Hearing: January 9, 2008.
Posting of Proposed Rule and Notice of Third Comment Period: January 30, 2008, Indiana Register (DIN: 20080130-IR-327070185PRA).
Notice of Public Hearing: January 30, 2008, Indiana Register (DIN: 20080130-IR-327070185PHA).
Date of Second Hearing: March 12, 2008.


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; IC 13-14-9; IC 13-18-3


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 mixing zone, shall meet the minimum conditions of being 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 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 a nuisance.
(D) Are in concentrations or combinations that will cause or contribute to the growth of aquatic plants or algae to such degree as to:
(i) create a nuisance;
(ii) be unsightly; or
(iii) otherwise impair the designated uses.
(E) Are in amounts sufficient to be acutely toxic to, or to otherwise severely injure or kill, aquatic life, other animals, plants, or humans. To assure protection of aquatic life, concentrations of toxic substances shall 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:
(i) for certain substances, an AAC is established and set forth in subdivision (3), Table 6-1 and subdivision (3), Table 6-2 (which table incorporates subdivision (4), Table 6-3);
(ii) for substances for which an AAC is not specified in subdivision (3), Table 6-1 or subdivision (3), Table 6-2, an AAC can be calculated by the commissioner using the procedures in section 8.2 of this rule; and
(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 clause shall 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 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 are established:
(A) A toxic substance or pollutant shall not be present in such waters 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 in subdivision (3), Table 6-1 and subdivision (3), Table 6-2 (which table incorporates subdivision (4), Table 6-3).
(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 or subdivision (3), Table 6-2, 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.
(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 a mixing zone for a discharge of that substance. Similarly, in 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 the mixing zone for a discharge of that substance. 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:
Table 6-1 
Surface Water Quality Criteria for Specific Substances 
AAC (Maximum)  CCC 
    Outside of Mixing Zone  Point of Water Intake 
Substances    Aquatic Life (CAC) (4-Day Average)  Human Health (30-Day Average)  Human Health (30-Day Average) 
Metals (μg/l)         
(Total recoverable)         
Antimony      45,000 (T)  146 (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     
Lead    50 (D) 
Mercury$  2.4  0.012  0.15 (T)  0.14 (T) 
Nickel  100 (T)  13.4 (T) 
Selenium  130*  35    10 (D) 
Silver      50 (D) 
Thallium      48 (T)  13 (T) 
Zinc     
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) 
Chlorides Chloride (mg/l)  860  230     
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 not exceed two (2.0) mg/l in all surface waters outside of the mixing zone except the Ohio River and Interstate Wabash River where it shall not exceed one (1.0) mg/l outside of the mixing zone. 
Sulfates Sulfate shall not exceed one thousand (1,000) mg/l the criteria established in subdivision (5) in all surface waters outside of the mixing zone. 
#The AAC and CAC for this substance are established in Table 6-2.
*One-half (½) 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 or U.S. EPA procedures developed in 1985 in which the calculated FAV is divided by two (2) to reduce acute toxicity.
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 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.
Table 6-2 
Surface Water Quality Criteria for Specific Substances 
Substances  AAC (Maximum) (μg/l)  AAC Conversion Factors  CAC (4-Day Average) (μg/l)  CAC Conversion Factors 
Metals (dissolved)[1]         
Arsenic (III)  WER[2](360)  1.000  WER[2](190)  1.000 
Cadmium  WER[2](e(1.128 [ln(hardness)]-3.828) 1.136672-[(ln hardness)(0.041838)]  WER[2](e(0.7852 [ln(hardness)]-3.490) 1.101672-[(ln hardness)(0.041838)] 
Chromium (III)  WER[2](e(0.819 [ln(hardness)]+3.688) 0.316  WER[2](e(0.8190 [ln(hardness)]+1.561) 0.860 
Chromium (VI)  WER[2](16)  0.982  WER[2](11)  0.962 
Copper  WER[2](e(0.9422 [ln(hardness)]-1.464) 0.960  WER[2](e(0.8545 [ln(hardness)]-1.465) 0.960 
Lead  WER[2](e(1.273 [ln(hardness)]-1.460) 1.46203-[(ln hardness)(0.145712)]  WER[2](e(1.273 [ln(hardness)]-4.705) 1.46203-[(ln hardness)(0.145712)] 
Nickel  WER[2](e(0.8460 [ln(hardness)]+3.3612) 0.998  WER[2](e(0.8460 [ln(hardness)]+1.1645) 0.997 
Silver  WER[2](e(1.72 [ln(hardness)]-6.52)/2[3] 0.85     
Zinc  WER[2](e(0.8473 [ln(hardness)]+0.8604) 0.978  WER[2](e(0.8473 [ln(hardness)]+0.7614) 0.986 
[1] 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 shall 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] A value of one (1) shall be used for the water-effect ratio (WER) unless an alternate value is established under section 8.9 of this rule. 
[3] One-half (½) 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) 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:
Table 6-3 
Metals Concentrations in Micrograms Per Liter; Hardness in Milligrams Per Liter CaCO31 
  Arsenic (III)  Cadmium  Chromium (III)  Chromium (VI)  Copper  Lead  Nickel  Silver  Zinc 
Hardness  AAC  CAC  AAC  CAC  AAC  CAC  AAC  CAC  AAC  CAC  AAC  CAC  AAC  CAC  AAC  CAC  AAC  CAC 
50  360  190  1.7  0.62  310  100  16  11  8.9  6.3  30  1.2  790  87  0.52  –  64  58 
100  360  190  3.7  1.0  550  180  16  11  17  11  65  2.5  1400  160  1.7  –  110  100 
150  360  190  5.7  1.4  760  250  16  11  25  16  100  3.9  2000  220  3.5  –  160  150 
200  360  190  7.8  1.7  970  310  16  11  33  21  140  5.3  2500  280  5.7  –  210  190 
250  360  190  10  2.0  1200  380  16  11  40  25  170  6.7  3100  340  8.3  –  250  230 
300  360  190  12  2.3  1300  440  16  11  48  29  210  8.1  3600  400  11  –  290  270 
350  360  190  14  2.6  1500  500  16  11  55  33  240  9.5  4100  450  15  –  330  300 
400  360  190  17  2.9  1700  550  16  11  63  37  280  11  4600  510  19  –  370  340 
450  360  190  19  3.1  1900  610  16  11  70  41  320  12  5100  560  23  –  410  370 
500  360  190  21  3.4  2100  670  16  11  78  45  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 be used instead of the criteria in this table when dissolved metals 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 sulfate that shall not be exceeded in all surface waters outside of the mixing zone:
(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:
(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 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 applies to the surface water quality criteria for sulfate provided in clause (A):
(i) Sulfate criteria may only be established based on a chloride concentration greater than the CAC of two hundred thirty (230) mg/l for chloride, as established under Table 6-1, where the CAC for chloride has been modified on a site-specific basis in accordance with either the variance provisions under section 8.8 of this rule or the 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 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:
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 
5  500  515  703  891  1,080  1,268  1,456  1,644  1,832  2,020  2,020 
10  500  691  879  1,067  1,256  1,444  1,632  1,820  2,008  2,196  2,196 
15  500  867  1,055  1,243  1,432  1,620  1,808  1,996  2,184  2,372  2,372 
20  500  1,043  1,231  1,419  1,608  1,796  1,984  2,172  2,360  2,549  2,549 
25  500  1,164  1,343  1,522  1,701  1,880  2,059  2,238  2,417  2,596  2,596 
50  500  1,141  1,320  1,499  1,678  1,857  2,036  2,215  2,394  2,573  2,573 
100  500  1,093  1,272  1,451  1,630  1,809  1,988  2,167  2,346  2,525  2,525 
150  500  1,046  1,225  1,404  1,583  1,762  1,941  2,120  2,299  2,478  2,478 
200  500  998  1,177  1,356  1,535  1,715  1,894  2,073  2,252  2,431  2,431 
230  500  970  1,149  1,328  1,507  1,686  1,865  2,044  2,223  2,402  2,402 

(b) This subsection establishes minimum surface water quality for aquatic life. In addition to subsection (a), subdivisions (1) through (5) are established to ensure conditions necessary for the maintenance of a well-balanced aquatic community. The following are applicable at any point in the waters outside of the mixing zone:
(1) There shall be no substances that:
(A) impart unpalatable flavor to food fish; or
(B) result in offensive odors in the vicinity of the water.
(2) No pH values below six (6.0) or above nine (9.0), 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:
(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:
(A) There shall be no abnormal temperature changes that may adversely affect aquatic life 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 be maintained.
(C) The maximum temperature rise at any time or place above natural temperatures shall 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 not exceed the maximum limits in the following table during more than one percent (1%) of the hours in the twelve (12) month period ending with any month. At no time shall the water temperature at such locations exceed the maximum limits in the following table 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 be used to regulate ammonia:
(A) Except for waters covered in clause (B), at all times, all surface waters outside of mixing zones shall 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;
humans, animals, aquatic life, or plants.
(B) For those waters listed in subsection (c), the following ammonia criteria will apply outside the mixing zone:
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 by the value determined by: 1/(10pK a -pH + 1). 
Where:  pKa  0.09018 + (2729.92/(T + 273.2)) 
  pH  pH of water 
  °C 
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 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 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 waters outside of the mixing zone:
(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), dissolved oxygen concentrations shall 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), the maximum temperature rise above natural shall 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 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 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 not exceed the following:
(A) One hundred twenty-five (125) 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) 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 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 be limited to the lowest whole number result.
(5) Effluent limits to implement the criteria in subdivision (3) during the recreational season shall 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 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 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 supply:
(1) The coliform bacteria group shall not exceed the following:
(A) Five thousand (5,000) per one hundred (100) milliliters as a monthly average value (either MPN or MF count).
(B) Five thousand (5,000) per one hundred (100) milliliters in more than twenty percent (20%) of the samples examined during any month.
(C) Twenty thousand (20,000) 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 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 chlorides chloride or sulfates sulfate shall not exceed two hundred fifty (250) milligrams per liter unless due to naturally occurring sources.
(4) The concentration of dissolved solids shall 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 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) Chemical constituents in the waters shall not be present in such levels as to 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 not exceed seven hundred fifty (750) milligrams per liter at any time. 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 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 waters classified for limited uses under section 3(a)(5) of this rule shall, at a minimum, meet the following criteria:
(1) The criteria contained in subsection (a).
(2) The criteria contained in subsection (d).
(3) The criteria contained in subsection (f), where applicable.
(4) The waters must be aerobic at all times.
(5) Notwithstanding subdivisions (1) through (4), the quality of a limited use stream at the point where it becomes physically or chemically capable of supporting a higher use or at its interface with a higher use water segment shall meet the criteria that are applicable to the higher use water.

(i) This subsection establishes surface water quality for exceptional uses. Waters classified for exceptional uses warrant extraordinary protection. Unless criteria are otherwise specified on a case-by-case basis, the quality of all waters designated for exceptional use shall be maintained without degradation.
(Water Pollution Control Board; 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)


LSA Document #07-185(F)
Proposed Rule: 20080130-IR-327070185PRA
Hearing Held: March 12, 2008
Approved by Attorney General: May 16, 2008
Approved by Governor: May 22, 2008
Filed with Publisher: May 22, 2008, 10:40 a.m.
Documents Incorporated by Reference: None Received by Publisher
Small Business Regulatory Coordinator: Stacey Pfeffer, IDEM Compliance and Technical Assistance Program, OPPTA-MC60-04, 100 N. Senate Avenue, W-041, Indianapolis, IN 46204-2251, (317) 232-8172 or (800) 988-7901, CTAP@idem.in.gov
Small Business Assistance Program Ombudsman: Megan Tretter, IDEM Small Business Assistance Program Ombudsman, MC50-01 – IGCN 1301, 100 N. Senate Avenue, Indianapolis, IN 46204-2251, (317) 234-3386, mtretter@idem.in.gov

Posted: 06/18/2008 by Legislative Services Agency

DIN: 20080618-IR-327070185FRA
Composed: Feb 05,2023 12:26:56AM EST
A PDF version of this document.