327 Ind. Admin. Code 2-1-6

Current through January 8, 2025

Section 327 IAC 2-1-6 - Minimum surface water quality criteria

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

Affected: IC 13-11-2-258; IC 13-18-4; IC 13-30-2-1; IC 14-22-9

Sec. 6.

(a) The following are minimum surface water quality conditions:

(1) All surface waters, including waters within a mixing zone, 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) Settle to form putrescent or otherwise objectionable deposits.

(B) Occur in amounts sufficient to be unsightly or deleterious.

(C) Produce:

(i) color;

(ii) visible oil sheen;

(iii) odor; or

(iv) other conditions; to an extent that creates a nuisance.

(D) Occur in concentrations or combinations that will cause or contribute to the growth of aquatic plants or algae to a degree as to:

(i) create a nuisance;

(ii) be unsightly; or

(iii) otherwise impair the designated uses of the surface waters.

(E) Occur in amounts sufficient to be acutely toxic to, or to otherwise severely injure or kill, aquatic life, other animals, plants, or humans. To ensure protection of aquatic life, concentrations of toxic substances 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 specified in:

(AA) subdivision (3), Table 6-1, which incorporates subdivision (5), Table 6-2; and

(BB) subdivision (6).

(ii) An AAC may be calculated by the commissioner using the procedures in section 8.2 of this rule for substances for which an AAC is not specified in:

(AA) subdivision (3), Table 6-1, which incorporates subdivision (5), Table 6-2; or

(BB) subdivision (6).

(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.

(F) Clause (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) All surface waters outside of mixing zones 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. The requirements to ensure protection against the adverse effects identified in this subdivision are as follows:

(A) A toxic substance or pollutant must not be present in 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 specified in:

(i) subdivision (3), Table 6-1, which incorporates subdivision (5), Table 6-2;

(ii) subdivision (4)(A), Table 6-1a;

(iii) subdivision (4)(B), Table 6-1b;

(iv) subdivision (6); and

(v) subdivision (7), Table 6-4.

(C) 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 a CCC identified in clause (A) is not specified in:

(i) subdivision (3), Table 6-1, which incorporates subdivision (5), Table 6-2;

(ii) subdivision (4)(A), Table 6-1a;

(iii) subdivision (4)(B), Table 6-1b;

(iv) subdivision (6); or

(v) subdivision (7), Table 6-4.

(D) A CCC determined under clause (B)(i), (B)(iv), (B)(v), 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.

(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 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 apply at the point of the public water system intake.

(3) Surface water quality criteria for the protection of aquatic life for specific substances are as follows:

Table 6-1

Surface Water Quality Criteria for the Protection of Aquatic Life

CAS Number	Substances		Acute Aquatic Criteria (AAC) (Maximum) (µg/l)	AAC Conversion Factors (CF)	Chronic Aquatic Criteria (CAC) (4-Day Average) (µg/l)	CAC Conversion Factors (CF)
Metals	Metals
7440382		Arsenic[1]	WER(340)(CF)	1.000	WER(150)(CF)	1.000
7440439		Cadmium[1][2]	WER (e(0.9789[lnH]-3.866))(CF)	1.136672-[lnH]0.041838	WER (e(0.7977[lnH]-3.909))(CF)	1.101672-[lnH]0.041838
16065831		Chromium (III)[1][2]	WER (e(0.819[lnH]+3.7256))(CF)	0.316	WER (e(0.819[lnH]+0.6848))(CF)	0.860
18540299		Chromium (VI)[1]	WER(16)(CF)	0.982	WER(11)(CF)	0.962
7440508		Copper[1][2]	WER (e(0.9422[lnH]-1.464))(CF)	0.960	WER (e(0.8545[lnH]-1.465))(CF)	0.960
7439921		Lead[1][2]	WER (e(1.273[lnH]-1.460))(CF)	1.46203-[lnH]0.145712	WER (e(1.273[lnH]-4.705))(CF)	1.46203-[lnH]0.145712
7439976		Mercury[3][4]	2.4	NA	0.012	NA
7440020		Nickel[1][2]	WER (e(0.846[lnH]+2.255))(CF)	0.998	WER (e(0.846[lnH]+0.0584))(CF)	0.997
7440224		Silver[1][2][5]	WER (e(1.72[lnH]-6.59)/2)(CF)	0.85
7440666		Zinc[1][2]	WER (e(0.8473[lnH]+0.884))(CF)	0.978	WER (e(0.8473[lnH]+0.884))(CF)	0.986
	Organics
309002		Aldrin[4][5]	1.5	NA		NA
57749		Chlordane[4][5]	1.2	NA	0.0043	NA
2921882		Chlorpyrifos	0.083	NA	0.041	NA
50293		DDT[4][5]	0.55	NA	0.0010	NA
60571		Dieldrin[4][5]	1.3	NA	0.0019	NA
		Endosulfan[5]	0.11	NA	0.056	NA
72208		Endrin[4][5]	0.09	NA	0.0023	NA
76448		Heptachlor[4][5]	0.26	NA	0.0038	NA
58899		Gamma HCH (Lindane)[4][5]	1.0	NA	0.080	NA
56382		Parathion	0.065	NA	0.013	NA
87865		Pentachlorophenol	e(1.005[pH]-4.830)	NA	e(1.005[pH]-5.290)	NA
		Polychlorinated Biphenyls (PCBs)[4]		NA	0.014	NA
8001352		Toxaphene[4]	0.73	NA	0.0002	NA
	Other Substances
7782505		Chlorine (Total Residual)	19	NA	11	NA
7782505		Chlorine (intermittent, total residual)[6]			200	NA
57125		Cyanide (free)	22	NA	5.2	NA
Selenium CAC are specified in subdivision (4).
Chloride AAC and CAC are specifie in subdivision (6).

^[1] Aquatic life criteria for these metals are expressed as a dissolved concentration and are calculated using the water-effect ratio (WER) and the specified conversion factor (CF). The AAC and CAC for a dissolved metal are calculated by multiplying the WER by the criterion value or formula, and then by the appropriate CF. A value of one (1) must be used for the WER unless an alternate value is established under section 8.9 of this rule. The dissolved AAC and CAC must be rounded to two (2) significant digits, except when the criteria are used as intermediate values in a calculation, such as in the calculation of water quality-based effluent limitations (WQBELs).

^[2] The hardness values used in the equations for these criteria must not be greater than 400 mg/l as calcium carbonate (CaCO₃), and the criteria at a hardness of 400 mg/l as CaCO₃ are used for a water hardness above 400 mg/l as CaCO₃. The term "lnH" is the natural log of hardness.

^[3] Aquatic life criteria for this metal are expressed as a total recoverable concentration.

^[4] These substances are bioaccumulative chemicals of concern.

^[5] The AAC for these substances is one-half (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 procedures of the department or U.S. EPA procedures developed in 1985 in which the calculated FAV is divided by two (2) to reduce acute toxicity.

^[6] To be considered an intermittent discharge, total residual chlorine must not be detected in the discharge for a period of more than forty (40) minutes in duration, and these time periods must be separated by at least five (5) hours.

(4) Surface water quality criterion for selenium must meet the following:

(A) The surface water quality criterion for selenium, except for waters where the department has made, and U.S. EPA has approved, a site-specific determination that the criterion in Table 6-1b are applicable, is as follows:

Table 6-1a

Surface Water Quality Aquatic Life Criterion for Selenium (CAS # 7782492)

Chronic Aquatic Criterion (CAC)
Media Type	Fish Tissue[1]		Water Column[5][7]
Criterion Element	Egg/Ovary[2]	Fish Whole-Body or Muscle[3]	Monthly Average Exposure	Intermittent Exposure[6]
Magnitude	15.1 mg/kg dw	8.5 mg/kg dw whole-body or 11.3 mg/kg dw muscle (skinless, boneless filet)	1.5 µg/l in lentic aquatic systems	Click here to view Image
			3.1 µg/l in lotic aquatic systems
Duration	Instantaneous measurement[4]	Instantaneous measurement[4]	Thirty (30) days	Number of days per month with an elevated concentration
Frequency	Not to be exceeded	Not to be exceeded	Not more than once in three (3) years on average	Not more than once in three (3) years on average

^[1] Fish tissue elements are expressed as steady-state; the aquatic system should not be experiencing new or increasing inputs of selenium.

^[2] Egg or ovary supersedes any whole-body, muscle, or water column element when fish egg or ovary concentrations are measured.

Any proposal to sample egg or ovary fish tissue must be submitted to the department for review and approval prior to initiation of sampling, and the department will evaluate all representative egg or ovary fish tissue data to determine compliance with this criterion element.

^[3] Fish whole-body or muscle tissue supersedes the water column element when both fish tissue and water concentrations are measured. Any proposal to sample fish whole-body or muscle tissue must be submitted to the department for review and approval prior to initiation of sampling, and the department will evaluate all representative fish whole-body or muscle tissue data to determine compliance with this criterion element.

^[4] Fish tissue data provide instantaneous point measurements that reflect integrative accumulation of selenium over time and space in fish populations at a given site.

^[5] Water column values are the applicable criterion element in the absence of steady-state condition fish tissue data and for fishless waters. Water column values are based on dissolved total selenium in water and are derived from fish tissue values via bioaccumulation modeling. Instead of the requirements in 327 IAC 5-2-11.1(b)(2), the allowable mixing zone dilution will be determined by applying the guideline in 327 IAC 2-1-4 to the thirty (30) day, ten (10) year (Q_30,10) low flow of the receiving stream for the chronic aquatic criterion (CAC) water column criterion element applicable to lotic aquatic systems, in the absence of sitespecific mixing zone data.

^[6] Intermittent Exposure Equation variables mean the following:

WQC_int is the water column intermittent element.

WQC_30-dayis the water column monthly element for either lentic or lotic waters.

C_bkgrnd is the average background selenium concentration.

f_intis the fraction of any 30-day period during which elevated selenium concentrations occur, with f_int assigned a value >=0.033 (corresponding to one (1) day).

^[7] The water column criterion element may be modified on a site-specific basis in accordance with clause (C).

(B) The surface water quality criterion for selenium, where the department has made, and U.S. EPA has approved, a site-specific determination that fishes in the Order Acipenseriformes (Order includes sturgeon and paddlefish) do not occur at the site, is as follows:

Table 6-1b

Site-specific Surface Water Quality Aquatic Life Criterion for Selenium (CAS # 7782492) in Non-Acipenseriformes (No Sturgeon or Paddlefish) Waters^[1]

Chronic Aquatic Criterion (CAC)
Media Type	Fish Tissue[2]		Water Column[6][8]
Criterion Element	Egg/Ovary[3]	Fish Whole-Body or Muscle[4]	Monthly Average Exposure	Intermittent Exposure[7]
Magnitude	19.0 mg/kg dw	9.5 mg/kg dw whole-body or 13.1 mg/kg dw muscle (skinless, boneless filet)	2.7 µg/l in lentic aquatic systems	Click here to view Image
			5.5 µg/l in lotic aquatic systems
Duration	Instantaneous measurement[5]	Instantaneous measurement[5]	Thirty (30) days	Number of days per month with an elevated concentration
Frequency	Not to be exceeded	Not to be exceeded	Not more than once in three (3) years on average	Not more than once in three (3) years on average

^[1] This criterion is applicable to surface waters for which the department has made, and U.S. EPA has approved, a site-specific determination that fishes in the Order Acipenseriformes do not occur at the site. In making this determination, the department must comply with the procedures in clause (D).

^[2] Fish tissue elements are expressed as steady-state; the aquatic system should not be experiencing new or increasing inputs of selenium.

^[3] Egg or ovary supersedes any whole-body, muscle, or water column element when fish egg or ovary concentrations are measured.

Any proposal to sample egg or ovary fish tissue must be submitted to the department for review and approval prior to initiation of sampling, and the department will evaluate all representative egg or ovary fish tissue data to determine compliance with this criterion element.

^[4] Fish whole-body or muscle tissue supersedes the water column element when both fish tissue and water concentrations are measured. Any proposal to sample fish whole-body or muscle tissue must be submitted to the department for review and approval prior to initiation of sampling, and the department will evaluate all representative fish whole-body or muscle tissue data to determine compliance with this criterion element.

^[5] Fish tissue data provide instantaneous point measurements that reflect integrative accumulation of selenium over time and space in fish populations at a given site.

^[6] Water column values are the applicable criterion element in the absence of steady-state condition fish tissue data and for fishless waters. Water column values are based on dissolved total selenium in water and are derived from fish tissue values via bioaccumulation modeling. Instead of the requirements in 327 IAC 5-2-11.1(b)(2), the allowable mixing zone dilution will be determined by applying the guideline in 327 IAC 2-1-4 to the thirty (30) day, ten (10) year (Q_30,10) low flow of the receiving stream for the chronic aquatic criterion (CAC) water column criterion element applicable to lotic aquatic systems, in the absence of sitespecific mixing zone data.

^[7] Intermittent Exposure Equation variables mean the following:

WQC_int is the water column intermittent element.

WQC_30-day is the water column monthly element for either lentic or lotic waters.

C_bkgrnd is the average background selenium concentration.

f_int is the fraction of any 30-day period during which elevated selenium concentrations occur, with f_int assigned a value >=0.033 (corresponding to one (1) day).

^[8] The water column criterion element may be modified on a site-specific basis in accordance with clause (C).

(C) Modification of the selenium water column criterion element must be achieved according to the following:

(i) Site-specific water column criterion elements must be derived using either the empirical bioaccumulation factor (BAF) or mechanistic modeling method provided in Aquatic Life Ambient Water Quality Criterion for Selenium - Freshwater, EPA-822-R-16-006, Appendix K: Translation of a Selenium Fish Tissue Criterion Element to a Site-Specific Water Column Value (June 2016)*.

(ii) Any proposal to derive a site-specific water column criterion element must be submitted to the department for review and approval of the methodology and sampling plan prior to initiation of sampling. The department shall evaluate and approve the applicability of and use of all representative data used to derive a site-specific water column criterion element.

(iii) Any proposal to derive a site-specific water column criterion element must be protective of downstream designated uses for aquatic life and human health.

(iv) Upon receipt of an application for a site-specific water column criterion element, the department shall do the following:

(AA) Publish on the department's website all pertinent information about the proposed site-specific modification.

(BB) Provide notice and request comment on the application.

(v) Upon approval of a site-specific water column criterion element, the department shall do the following:

(AA) Publish a notice in the Indiana Register.

(BB) Place on the department's website all pertinent information about the approved site-specific modification.

(CC) Submit the site-specific modification to U.S. EPA for approval.

(DD) If approved by U.S. EPA, incorporate the site-specific modification into the water quality standards during the next revision of the water quality standards.

(vi) Site-specific modifications of this criterion must not be incorporated into a final NPDES permit or used for other Clean Water Act purposes until approved by U.S. EPA.

(D) Upon receipt of an application for a site-specific determination that fishes in the Order Acipenseriformes (Order includes sturgeon and paddlefish) do not occur at the site, the department shall do the following:

(i) Review available species occurrence and distribution information and do one (1) of the following:

(AA) Make a tentative determination that fishes in the Order Acipenseriformes do not occur at the site.

(BB) Make a determination that fishes in the Order Acipenseriformes occur at the site and deny the application.

(ii) Upon a tentative determination that fishes in the Order Acipenseriformes do not occur at the site, the department shall do the following:

(AA) Publish on the department's website all pertinent information about the proposed site-specific determination.

(BB) Provide notice and request comment on the tentative decision.

(iii) Upon a final determination that fishes in the Order Acipenseriformes do not occur at the site, the department shall do the following:

(AA) Publish a notice in the Indiana Register.

(BB) Place on the department's website all pertinent information about the approved site-specific modification.

(CC) Submit the site-specific modification to U.S. EPA for approval.

(DD) If approved by U.S. EPA, incorporate the site-specific modification into the water quality standards during the next revision of the water quality standards.

(iv) Site-specific modifications of this criterion must not be incorporated into a final NPDES permit or used for other Clean Water Act purposes until approved by U.S. EPA.

(5) The dissolved AAC and CAC for certain metals at selected hardness values calculated from the equations and conversion factors in subdivision (3), Table 6-1, with a value of one (1) used for the WER are as follows:

Table 6-2

Metals Concentrations in Micrograms Per Liter; Hardness in Milligrams Per Liter CaCO₃₁

Hardness	Arsenic		Cadmium		Chromium (III)		Chromium (VI)		Copper
	AAC	CAC	AAC	CAC	AAC	CAC	AAC	CAC	AAC	CAC
50	340	150	0.94	0.43	320	42	16	11	8.9	6.3
100	340	150	1.8	0.72	570	74	16	11	17	11
150	340	150	2.6	0.97	790	100	16	11	25	16
200	340	150	3.4	1.2	1,000	130	16	11	33	21
250	340	150	4.2	1.4	1200	160	16	11	40	25
300	340	150	5.0	1.6	1,400	180	16	11	48	29
350	340	150	5.8	1.8	1,600	210	16	11	55	33
400	340	150	6.5	2.0	1,800	230	16	11	63	37

Hardness	Lead		Nickel		Silver		Zinc
	AAC	CAC	AAC	CAC	AAC	CAC	AAC	CAC
50	30	1.2	260	29	0.49	-	65	66
100	65	2.5	470	52	1.6		120	120
150	100	3.9	660	73	3.2		170	170
200	140	5.3	840	93	5.3		210	210
250	170	6.7	1,000	110	7.8		250	260
300	210	8.1	1,200	130	11	-	300	300
350	240	9.5	1,400	150	14	-	340	340
400	280	11	1,500	170	17		380	380

^[1] The dissolved metals criteria in this table have been rounded to two (2) significant digits in accordance with subdivision (3), Table 6-1. The equations and conversion factors in subdivision (3), Table 6-1 must be used instead of the criteria in this table when these criteria are used as intermediate values in a calculation, such as in the calculation of WQBELs.

(6) Surface water quality criteria for chloride for protection of aquatic life are as follows:

(A) 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 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) 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 (8), 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

(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 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 AAC for chloride in mg/l at selected concentrations of hardness (in mg/l as CaCO₃) and sulfate is as follows:

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 table when chloride criteria are used as intermediate values in a calculation, such as in the calculation of WQBELs.

(E) The CAC for chloride in mg/l at selected concentrations of hardness (in mg/l as CaCO₃) and sulfate is as follows:

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 table when chloride criteria are used as intermediate values in a calculation, such as in the calculation of WQBELs.

(7) Surface water quality criteria for protection of human health for specific substances are as follows:

Table 6-4
Surface Water Quality Criteria for Protection of Human Health[1]
CAS Number	Substances		Continuous Criterion Concentrations
			Outside of Mixing Zone (µ/l)	Point of Water Intake (µ/l)
	Metals (total recoverable)
7440360		Antimony	640 (T)	5.6 (T)
		Arsenic III	0.175 (C)	0.022 (C)
7440393		Barium		1,000 (D)
7440508		Copper		1,300 (D)
7439976		Mercury[2]	0.15 (T)	0.14 (T)
7440020		Nickel	4,600 (T)	610 (T)
7782492		Selenium	4,200 (T)	170 (T)
7440280		Thallium	48 (T)	13 (T)
7440666		Zinc	26,000 (T)	7,400 (T)
	Organics
107028		Acrolein	780 (T)	320 (T)
107131		Acrylonitrile	6.5 (C)	0.58 (C)
309002		Aldrin[2]	0.00079 (C)	0.00074 (C)
71432		Benzene	400 (C)	6.6 (C)
92875		Benzidine	0.0053 (C)	0.0012 (C)
56235		Carbon Tetrachloride	69.4 (C)	4.0 (C)
57749		Chlordane[2]	0.0048 (C)	0.0046 (C)
	Chlorinated Benzenes
108907		Monochlorobenzene		488 (T)
95943		1,2,4,5-Tetrachlorobenzene[2]	48 (T)	38 (T)
608935		Pentachlorobenzene[2]	85 (T)	74 (T)
118741		Hexachlorobenzene[2]	0.0074 (C)	0.0072 (C)
	Chlorinated Ethanes
107062		1,2-dichloroethane	2,430 (C)	9.4 (C)
71556		1,1,1-trichloroethane	1,030,000 (T)	18,400 (T)
79005		1,1,2-trichloroethane	418 (C)	6.0 (C)
79345		1,1,2,2-tetrachloroethane	107 (C)	1.7 (C)
67721		Hexachloroethane	87.4 (C)	19 (C)
	Chlorinated Phenols
95954		2,4,5-trichlorophenol		2,600 (T)
88062		2,4,6-trichlorophenol	36 (C)	12 (C)
	Chloroalkyl Ethers
		bis(2-chloroisopropyl) ether	4,360 (T)	34.7 (T)
542881		bis(chloromethyl) ether	0.018 (C)	0.000038 (C)
111444		bis(2-chloroethyl) ether	13.6 (C)	0.3 (C)
67663		Chloroform	157 (C)	1.9 (C)
50293		DDT[2]	0.00024 (C)	0.00024 (C)
		Dichlorobenzenes	2,600 (T)	400 (T)
		Dichlorobenzidine	0.2 (C)	0.1 (C)
75354		1,1-dichloroethylene	18.5 (C)	0.33 (C)
120832		2,4-dichlorophenol		3,090 (T)
		Dichloropropenes	14,100 (T)	87 (T)
60571		Dieldrin[2]	0.00076 (C)	0.00071 (C)
121142		2,4-dinitrotoluene	91 (C)	1.1 (C)
1746016		Dioxin (2,3,7,8-TCDD)[2]	0.0000001 (C)	0.0000001 (C)
122667		1,2-diphenylhydrazine	5.6 (C)	0.422 (C)
		Endosulfan	159 (T)	74 (T)
72208		Endrin[2]		1.0 (D)
100414		Ethylbenzene	3,280 (T)	1,400 (T)
206440		Fluoranthene	54 (T)	42 (T)
		Halomethanes	157 (C)	1.9 (C)
76448		Heptachlor[2]	0.0028 (C)	0.0028 (C)
87683		Hexachlorobutadiene[2]	500 (C)	4.47 (C)
		Hexachlorocyclohexane (HCH)
319846		alpha HCH[2]	0.31 (C)	0.09 (C)
319857		beta HCH[2]	0.55 (C)	0.16 (C)
58899		gamma HCH (Lindane)[2]	0.63 (C)	0.19 (C)
608731		Technical HCH[2]	0.41 (C)	0.12 (C)
77474		Hexachlorocyclopentadiene		206 (T)
78591		Isophorone	520,000 (T)	5,200 (T)
98953		Nitrobenzene		19,800 (T)
	Nitrophenols
534521		4,6-dinitro-o-cresol	765 (T)	13.4 (T)
25550587		Dinitrophenol	14,300 (T)	70 (T)
	Nitrosamines
55185		N-nitrosodiethylamine	12.4 (C)	0.008 (C)
62759		N-nitrosodimethylamine	160 (C)	0.014 (C)
924163		N-nitrosodibutylamine	5.9 (C)	0.064 (C)
86306		N-nitrosodiphenylamine	161 (C)	49 (C)
930552		N-nitrosopyrrolidine	919 (C)	0.16 (C)
87865		Pentachlorophenol		1,000 (T)
108952		Phenol		3,500 (T)
	Phthalate Esters
131113		Dimethyl phthalate	2,900,000 (T)	313,000 (T)
84662		Diethyl phthalate	1,800,000 (T)	350,000 (T)
84742		Dibutyl phthalate	154,000 (T)	34,000 (T)
117817		Di-2-ethylhexyl phthalate	50,000 (T)	15,000 (T)
		Polychlorinated Biphenyls (PCBs)[2]	0.00079 (C)	0.00079 (C)
		Carcinogenic Polynuclear Aromatic Hydrocarbons (PAHs)	0.31 (C)	0.028 (C)
127184		Tetrachloroethylene	88.5 (C)	8 (C)
108883		Toluene	424,000 (T)	14,300 (T)
8001352		Toxaphene[2]	0.0073 (C)	0.0071 (C)
79016		Trichloroethylene	807 (C)	27 (C)
75014		Vinyl Chloride	5,246 (C)	20 (C)
	Other Substances
1332214		Asbestos (fibers/liter)		300,000 (C)
57125		Cyanide (Total)		200 (D)
[1]The human health criteria are thirty (30) day average criteria.
T-derived from threshold toxicity
C-derived from nonthreshold cancer risk
D-derived from drinking water standards, equal to or less than threshold toxicity
[2]This substance is a bioaccumulative chemical of concern.

(8) Surface water quality criteria for sulfate that must not be exceeded in surface waters outside of a mixing zone are as follows:

(A) The 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 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) 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 (6) 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

(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) 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 surface water quality criteria for sulfate in mg/l at selected concentrations of hardness (in mg/l as CaCO₃) and chloride are as follows:

Table 6-5^[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
5	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 table when sulfate criteria are used as intermediate values in a calculation, such as in the calculation of WQBELs.

(9) Fluoride must not exceed two (2.0) mg/l in surface waters outside of a mixing zone except in the Ohio River and Interstate Wabash River where it must not exceed one (1.0) mg/l outside of a mixing zone.

(b) In addition to subsection (a), the following minimum conditions are applicable in the surface waters outside of a mixing zone to ensure conditions necessary for the maintenance of a well-balanced aquatic community:

(1) There must be no substance that:

(A) imparts unpalatable flavor to food fish; or

(B) results in offensive odors in the vicinity of the water.

(2) No pH values below six (6.0) or above nine (9.0) are permitted, except daily fluctuations that:

(A) exceed pH nine (9.0); and

(B) are correlated with photosynthetic activity.

(3) Concentrations of dissolved oxygen 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) Conditions for temperature are as follows:

(A) 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 must be maintained.

(C) The maximum temperature rise at any time or place above natural temperatures 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 must not exceed the maximum limits in the following table:

(i) during more than one percent (1%) of the hours in the twelve (12) month period ending with any month; and

(ii) by more than three (3) degrees Fahrenheit (one and seven-tenths (1.7) degrees Celsius):

Table 6-6

	Ohio River Main Stem EF(EC)	Other Indiana Streams EF(EC)
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 must be used to regulate ammonia:

(A) Except for waters covered in clause (B), surface waters outside of mixing zones 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:

(i) humans;

(ii) animals;

(iii) aquatic life; or

(iv) plants.

(B) For waters listed in subsection (c), the following ammonia criteria apply outside of a mixing zone:

Table 6-7

Maximum Ammonia Concentrations (Unionized Ammonia as N)***

(mg/l) Temperature (°C)

pH	0	5	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 this table by the value determined by: 1/(10^{pK a -pH} + 1). Where: pKa = 0.09018 + (2729.92/(T + 273.2))

pH = pH of water

T = EC

Table 6-8

24-Hour Average Ammonia Concentrations (Unionized Ammonia as N)*** (mg/l) Temperature (EC)

pH	0	5	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 this table by the value determined by: 1/(10^{pK a -pH} + 1).

Where: pKa = 0.09018 + (2729.92/(T + 273.2))

pH = pH of water

T = EC

(c) 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 applicable outside of a mixing zone in the surface waters designated as salmonid waters to ensure conditions necessary for the maintenance of a well-balanced, cold-water fish community:

(1) Dissolved oxygen concentrations 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.

(2) The maximum temperature rise above natural 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 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) 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 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 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 must be limited to the lowest whole number result.

(5) Effluent limits to implement the criteria in subdivision (3) during the recreational season 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 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 must be limited to the lowest whole number result.

(e) In addition to subsections (a) and (d), the criteria 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 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, 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 must not exceed two hundred fifty (250) milligrams per liter unless due to naturally occurring sources.

(4) The concentration of dissolved solids 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 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 as a thirty (30) day average value; and

(B) concentration of nitrite-N must not exceed one (1) milligram per liter as a thirty (30) day average value.

(7) Chemical constituents in the waters must not be present at levels that prevent, after conventional treatment, meeting the drinking water standards contained in 327 IAC 8-2, due to other than natural causes.

(f) In addition to subsection (a), dissolved solids 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) The criteria to ensure surface water quality conditions necessary for agricultural use are the same as those in subsection (a).

(h) The quality of surface waters designated for limited uses under section 11(a) of this rule must, at a minimum, meet the criteria contained in subsections (a), (d), and where applicable, (f), and be aerobic at all times. However, the water must meet the criteria that are applicable to the higher use water at the point where a limited use water:

(1) becomes physically or chemically capable of supporting a higher use; or

(2) interfaces with a higher use water segment.

*This document is incorporated by reference. Copies may be obtained from the U.S. EPA National Service Center for Environmental Publications (www.epa.gov/nscep), or are available for review at the Indiana Department of Environmental Management, Office of Legal Counsel, Indiana Government Center North, Thirteenth Floor, 100 North Senate Avenue, Indianapolis, Indiana 46204.

327 IAC 2-1-6

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; filed Jul 9, 2012, 2:54 p.m.: 20120808-IR-327110320FRA; Filed 11/10/2014, 1:51 p.m.: 20141210-IR-327130290FRA

Filed 11/5/2021, 12:56 p.m.: 20211201-IR-327140058FRA

Readopted filed 10/18/2024, 1:57 p.m.: 20241113-IR-327230810RFA