SWC Rules, Chapter B
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SWC Rules, Chapter B
As Approved March 13, 1998
Part 12. Water Quality Standards for Surface Waters
Section 12.1 Scope of This Part
Section 12.2 Designated Uses
(a) Use Classifications.
(b) Classification of Reservation Surface Waters.
(c) Change in Classification of Surface Waters.
Section 12.3 Water Quality Criteria
(a) Narrative Standards for All Reservation Surface Waters.
(b) Additional Narrative Criteria for Class 2-A Waters.
(c) Numeric Criteria for all Reservation Surface Waters.
Section 12.4 Review and Revision of Standards
Section 12.5 Antidegradation Policy
Section 12.6 Methods and Procedures
Section 12.7 Mixing Zone Policy
Section 12.8 Variance Policy
[Authority: This Part is based on Subtitle B of the Tribal Water Code and
the Clean Water Act. Water quality standards provisions are applicable for
CWA purposes only after adoption by the Tribal Council and approval by
EPA. Other provisions applicable to a waterbody under Tribal law, and not
intended to be applicable for CWA purposes, are effective upon adoption by
the Tribal Council.]
Section 12.1 Scope of This Part
This Part of the Commission's rules establishes water quality standards for all
Reservation surface waters specified in Section 11.2 of the preceding Chapter.
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SWC Rules, Chapter B
As Approved March 13, 1998
Section 12.2 Designated Uses
The Tribal Water Quality Code directs the Commission to establish designated
uses for all water bodies within the Tribe's Reservations. The first step in establishing
designated uses is to establish classes of uses. The second step is to apply the
classification system by assigning each water body a designated use. The Commission
may decide to divide a body of water into segments and assign different use
classifications to different segments.
(a)
Use Classifications.
(1) Classes. The Commission has classified all Reservation surface waters
according to the following designated uses:
Class 1. Potable water supply.
Class 2.
Protection, propagation and harvesting of fish and wildlife;
maintenance of a well-balanced population of fish and wildlife;
recreation in and on the water. Class 2 waters are further
classified according to the sub-classes listed in paragraph (2)
below.
Class 3.
Agricultural purposes.
(2) Sub-Classes. Class 2 waters are further classified according to the
following sub-classes:
Sub-Class 2-A. Cultural and Religious Significance. Protection of specific
waterbodies that are important for ceremonial and religious uses (as these
terms are defined in Section 11.5 of this Chapter).
Sub-Class 2-B. General Purpose Class 2.
Protection, propagation and harvesting of fish and wildlife; maintenance of a
well-balanced population of fish and wildlife; recreation in and on the water.
Sub-Class 2-C. Artificial Conveyances; Water Resource Areas, Irrigation
Cells and Pasture Runoff Collection and Transportation Systems.
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SWC Rules, Chapter B
As Approved March 13, 1998
Protection, propagation and harvesting of fish and wildlife that is tolerant of
nutrients and other pollutants.
(3) Inclusive Nature of Designated Use Classes. Classification of a
waterbody for a particular designated use does not mean that the waterbody may not be
used for other purposes as well. Water quality classifications are arranged in order of the
degree of protection required, with Class 1 generally having the most stringent water
quality criteria and Class 3 the least stringent. For any waterbody designated Class 3, the
Tribe will be required to conduct a use attainability analysis (UAA) pursuant to 40 CFR §
131.10 (j). Water quality criteria that apply to a class of surface waters are designed to
maintain the minimum conditions necessary to assure that a waterbody is suitable for its
designated use, and these criteria are generally adequate to maintain the conditions
required for designated uses of less stringently regulated classifications. Therefore,
designated uses of less stringently regulated classifications are generally deemed to be
included in the designated uses of more stringently regulated classifications. For
example, a waterbody designated Class 2 may be used as a source of supply for
agricultural purposes.
(b) Classification of Reservation Surface Waters.
Except as otherwise provided in this section, all Reservation surface waters on the
Big Cypress and Brighton Reservations are designated Class 2-B. All canals managed
by the South Florida Water Management District are also expressly designated Class
2-B, unless specifically designated Class 2-C below. Exceptions to the general
designation of surface waters as Class 2-B follow:
(1) Class 2-A -- Cultural or Religious Waters. The following specifically
identified waters are designated Class 2-A waters:
Big Cypress Reservation
[No waters have been so designated at this time. When such waters are
designated, appropriate baseline conditions shall be established.]
Brighton Reservation
[No waters have been so designated at this time. When such waters are
designated, appropriate baseline conditions shall be established.]
(2) Class 2-C -- Artificial Conveyances and pasture runoff collection
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SWC Rules, Chapter B
As Approved March 13, 1998
and transportation systems. All wholly artificial (man-made) canals and ditches
that convey surface water from lands (including farms, pastures and citrus groves)
to canals that are managed by the South Florida Water Management District are
designated Class 2-C waters, except for any artificial ditches or canals that are
specifically listed below as Class 3. This designation applies whether such canals
or ditches discharge directly into the District's canals or whether they discharge
into a component of the Tribe's surface water system for that Reservation.
The following artificial conveyances on the Reservation are designated Class 2-C:
Big Cypress Reservation
-Water control system W-1
-Water control system W-2
-Water control system W-3
-Water control system W-4
-Water control system W-5
-Water control system W-6
-Water control system E-1
-Water control system E-2
-Water control system E-3
-Water control system E-4
-Water control system E-5
-Water control system E-6
Brighton Reservation
A Group
-Ditch A-1
-Ditch A-2
-Ditch A-3
-Ditch A-4
-Ditch A-5
-Ditch A-6
B Group
-Ditch B-1
-Ditch B-2
-Ditch B-3
-Ditch B-4
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SWC Rules, Chapter B
As Approved March 13, 1998
-Ditch B-5
-Ditch B-6
-Ditch B-7
-Ditch B-8
-Ditch B-9
-Ditch B-10
C Group
-Ditch C-1
-Ditch C-2
D Group
-Ditch D-2
-Ditch D-3
-Ditch D-4
-Ditch D-5
-Ditch D-6
-Ditch D-7
-Ditch D-8
-Ditch D-9
-Ditch D-10
-Ditch D-11 (Tannerhill Meanderline Ditch)
E Group
-Ditch E-1
-Ditch E-2
Mose Canal
Old Harney Pond Oxbow (from Russ & Sunni's to the Triangle)
Hwy 721 community drainage ditch
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SWC Rules, Chapter B
As Approved March 13, 1998
(3)
Class 2-C -- Water Resource Areas and Irrigation Cells.
Big Cypress Reservation
Water resource areas and irrigation cells (defined in Section 11.5 and
components of the Tribe's Water Conservation System Conceptual Plan for the Big
Cypress Reservation) are designated Class 2-C. Additionally, isolated wetlands that
are not components of the Conceptual Plan are also designated Class 2-C.
Brighton Reservation
Not Applicable
(4)
Class 3 -- Agricultural Purposes. The following wholly artificial
(man-made) canals, pits or ditches are designated as Class 3 waters:
Big Cypress and Brighton Reservations
-Borrow pits
-Livestock watering ponds
-Field ditches
-Rim ditches
-Spreader swales
-Highway swales
(c) Change in Classification of Surface Waters.
(1)
Any person who is subject to these rules may seek reclassification
of Reservation surface waters by filing a petition with the Commission. The Department
may develop a form for use in any such petition. Any petition for reclassification shall
be accompanied by the information necessary for the Commission to make the
affirmative finding described in paragraph (3) below.
(2)
The Commission will consider any petition for reclassification at a
regularly scheduled meeting of the Commission. The Commission may decide not to
take any action in response to a petition. If it determines that there is merit in a petition,
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SWC Rules, Chapter B
As Approved March 13, 1998
the Commission may decide to initiate changes to its rules. The Commission may not
reclassify water(s) based only on a petition, but, rather, to reclassify water(s) the
Commission must comply with the procedural requirements of the Tribal Water Quality
Code and the provisions of the Clean Water Act. To initiate such changes, the
Commission may direct the Department to incorporate the proposed reclassification in
the next triennial review of the Tribe's water quality standards, pursuant to section 12.4
below, or the Commission may ask the Department to prepare proposed amendments
to its rules to address only those issues raised in the petition. In any case in which the
proposed rule changes affect only one of the Tribe's Reservations, a community
meeting need be held on only that Reservation.
(3)
In addition to receiving petitions from the affected public, the
Commission, at any time, may act on its own initiative, or on the recommendation of the
Director, to amend its rules to reclassify certain waters.
(4)
Before initiating a rule change to reclassify water(s), the
Commission must make a determination that the proposed reclassification: (a) would
establish the most beneficial use of the particular water(s); (b) would serve the interests
of the Tribe and the affected Reservation community; (c) would be attainable; (d) would
ensure attainment and maintenance of the water quality standards of downstream
waterbodies, and; (e) in situations where a designated use is being replaced with a use
supported by less stringent criteria, adheres to the conditions set forth in 40 CFR §
131.10 (g) and (h). Further, in reclassifying water(s), the Commission will include any
existing uses not previously recognized in the list of designated uses.
SECTION 12.3 WATER QUALITY CRITERIA
(a)
Narrative Standards for All Reservation Surface Waters.
All Reservation surface waters, including those within mixing zones, shall be free
from substances attributable to wastewater discharges or other pollutant sources that:
(1)
Settle to form objectionable deposits;
(2)
Float as debris, scum, oil, or other matter forming nuisances;
(3)
Produce objectionable color, odor, taste, or turbidity;
(4)
Cause injury to, or are chronically toxic to, or produce adverse
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SWC Rules, Chapter B
As Approved March 13, 1998
physiological responses in humans, wildlife, plants or fish and other
aquatic life; or
(5)
Are unsuitable for aquatic life propagation and maintenance and,
where attainable, support balanced indigenous populations of
aquatic life.
(b) Additional Narrative Criteria for Class 2-A Waters.
In addition to the narrative criteria set forth in paragraph (a) above and the
numeric criteria for Class 2-B waters found in Table 12, all Reservation surface waters
designated Class 2-A shall be free from activities and substances attributable to
wastewater discharges or other pollutant sources that:
(1)
Disturb, injure or in any way jeopardize the continued existence of
the unique diverse plant and wildlife used in the religious
ceremonies and customs of the Tribe; or
(2)
Impair the biological community as it naturally occurs in the
designated area due to physical, chemical or hydrologic changes.
(c) Numeric Criteria for all Reservation Surface Waters.
The Commission has determined that the interests of the Tribe would be
adequately served by adopting numeric criteria based on criteria that have been
adopted by the State of Florida with guidance by EPA. The State of Florida has
adopted numeric criteria for 72 pollutant parameters, which are set out in a table in
section 62-302.530 of the Florida Administrative Code. The Commission finds that
these criteria, which have been approved by EPA, are based on defensible scientific
methodologies and are (in most instances) based on federal guidelines. The
Department has prepared Table 12 (immediately following this paragraph) which sets
out numeric criteria for pollutant parameters based primarily on these criteria. Except
as otherwise specifically provided in these rules or in the notes accompanying Table 12,
the Commission hereby approves these numeric criteria as applicable to Reservation
surface waters for the corresponding classes of designated uses.
- Part 12 - Page 8 -
TABLE 12
Criteria for all Reservation Surface Waters on the
Big Cypress and Brighton Reservations
PARAMETER
UNITS
*PP
**C
Class I:
Potable Water
Supply
Class II: Recreation, Propagation and
Maintenance of a Healthy, Well-Balanced
Population of Fish and Wildlife
SUBSUBSUBCLASS
CLASS
CLASS
2-A
2-C
2-B
Class III:
Agricultural
Purposes
See Section
12.3 (a) & (b)
of this Part.
1. Alkalinity
mg/L as
CaCO3
N
N
2. Aluminum
µg/L
N
N
3. Ammonia
(un-ionized)
mg/L as NH3
N
N
4. Antimony
µg/L
Y
5.a. Arsenic
(total)
µg/L
5.b. Arsenic
µg/L measured
Shall not be
depressed below 20
Shall not be depressed
below 20
<87
<600
<87
See EPA tables of ambient
water quality criteria
document for Ammonia,
EPA 822-R-99-014
N
See EPA tables of
ambient water quality
criteria document for
Ammonia, EPA822R-99-014
5.6
Y
Y
<10
<10
Y
Y
640
640
<10
150
<10
150
Notes: (1) "*PP" means priority pollutant; (2) "**C" means Carcinogen; (3) "Annual avg" means the maximum
concentration at average annual flow conditions measured and represented as a 12 month moving average; (4)
"Max" means the maximum not to be exceeded at any time; (5) "ln H" means the natural logarithm of total hardness
expressed as milligrams/L of CaCO3. For metals criteria involving equations with hardness, the hardness shall be set
at 25 mg/L if actual hardness is <25 mg/L and set at 400 mg/L if actual hardness is >400 mg/L; (6) Criteria are
protective of human health not of aquatic life.
PARAMETER
UNITS
*PP
**C
Class I:
Potable Water
Supply
Class II: Recreation, Propagation and
Maintenance of a Healthy, Well-Balanced
Population of Fish and Wildlife
SUBSUBSUBCLASS
CLASS
CLASS
2-A
2-C
2-B
Class III:
Agricultural
Purposes
See Section
12.3 (a) & (b)
of this Part.
(trivalent)
as total
recoverable
Arsenic
6.
Bacteriological
Quality (Fecal
Coliform
Bacteria)
Number per
100 ml (Most
Probable
Number (MPN)
or Membrane
Filter (MF))
N
N
MPN or MF counts
shall not exceed a
monthly average of
200, nor exceed 400
in 10% of the
samples, nor exceed
800 on any one day.
Monthly averages
shall be expressed
as geometric means
based on a minimum
of 5 samples taken
over a 30 day period.
MPN or MF counts shall not
exceed a monthly average of
200, nor exceed 400 in 10%
of the samples, nor exceed
800 on any one day.
Monthly averages shall be
expressed as geometric
means based on a minimum
of 5 samples taken over a 30
day period.
7. Benzene
µg/L
Y
Y
2.2
51 annual avg. 51 annual
Notes: (1) "*PP" means priority pollutant; (2) "**C" means Carcinogen; (3) "Annual avg" means the maximum
concentration at average annual flow conditions measured and represented as a 12 month moving average; (4)
"Max" means the maximum not to be exceeded at any time; (5) "ln H" means the natural logarithm of total hardness
expressed as milligrams/L of CaCO3. For metals criteria involving equations with hardness, the hardness shall be set
at 25 mg/L if actual hardness is <25 mg/L and set at 400 mg/L if actual hardness is >400 mg/L; (6) Criteria are
protective of human health not of aquatic life.
PARAMETER
UNITS
*PP
**C
Class I:
Potable Water
Supply
Class II: Recreation, Propagation and
Maintenance of a Healthy, Well-Balanced
Population of Fish and Wildlife
SUBSUBSUBCLASS
CLASS
CLASS
2-A
2-C
2-B
See Section
12.3 (a) & (b)
of this Part.
8. Biological
Integrity
Percent
reduction of
ShannonWeaver
Diversity Index
N
N
The Index for benthic
macroinvertebrates
shall not be reduced
to less than 75% of
background levels as
measured using
organisms retained
by a U.S. Standard
No. 30 sieve and
collected and
composited from a
minimum of three
Hester-Dendy type
artificial substrate
samplers of 0.10 to
0.15 m² area each,
incubated for a
Class III:
Agricultural
Purposes
avg.
The Index for benthic
macroinvertebrates shall not
be reduced to less than 75%
of background levels as
measured using organisms
retained by a U.S. Standard
No. 30 sieve and collected
and composited from a
minimum of three HesterDendy type artificial
substrate samplers of 0.10
to 0.15 m² area each,
incubated for a period of four
weeks.
Notes: (1) "*PP" means priority pollutant; (2) "**C" means Carcinogen; (3) "Annual avg" means the maximum
concentration at average annual flow conditions measured and represented as a 12 month moving average; (4)
"Max" means the maximum not to be exceeded at any time; (5) "ln H" means the natural logarithm of total hardness
expressed as milligrams/L of CaCO3. For metals criteria involving equations with hardness, the hardness shall be set
at 25 mg/L if actual hardness is <25 mg/L and set at 400 mg/L if actual hardness is >400 mg/L; (6) Criteria are
protective of human health not of aquatic life.
PARAMETER
UNITS
*PP
**C
Class I:
Potable Water
Supply
period of four weeks.
9. BOD
(Biochemical
Oxygen
Demand)
N/A
N
N
10. Boron
mg/L
N
N
11. Cadmium
See Note (5)
µg/L
Y
N
Shall not be
increased to exceed
values which would
cause dissolved
oxygen to be
depressed below the
limit established for
each class and, in no
case, shall it be great
enough to produce
nuisance conditions.
Class II: Recreation, Propagation and
Maintenance of a Healthy, Well-Balanced
Population of Fish and Wildlife
SUBSUBSUBCLASS
CLASS
CLASS
2-A
2-C
2-B
Class III:
Agricultural
Purposes
See Section
12.3 (a) & (b)
of this Part.
Shall not be increased to exceed values
which would cause dissolved oxygen to be
depressed below the limit established for
each class and, in no case, shall it be great
enough to produce nuisance conditions.
0.75
exp(0.7409[InH]4.719).
exp(0.7409[In
H]-4.719)..
exp(0.7409[
InH]4.719)..
exp(0.7409[
InH]4.719)..
Notes: (1) "*PP" means priority pollutant; (2) "**C" means Carcinogen; (3) "Annual avg" means the maximum
concentration at average annual flow conditions measured and represented as a 12 month moving average; (4)
"Max" means the maximum not to be exceeded at any time; (5) "ln H" means the natural logarithm of total hardness
expressed as milligrams/L of CaCO3. For metals criteria involving equations with hardness, the hardness shall be set
at 25 mg/L if actual hardness is <25 mg/L and set at 400 mg/L if actual hardness is >400 mg/L; (6) Criteria are
protective of human health not of aquatic life.
PARAMETER
UNITS
*PP
**C
Class I:
Potable Water
Supply
Class II: Recreation, Propagation and
Maintenance of a Healthy, Well-Balanced
Population of Fish and Wildlife
SUBSUBSUBCLASS
CLASS
CLASS
2-A
2-C
2-B
Class III:
Agricultural
Purposes
See Section
12.3 (a) & (b)
of this Part.
12. Carbon
tetrachloride
µg/L
Y
Y
0.23 annual avg; 3.0
max
1.6 annual
avg.
1.6 annual
avg.
13. Chlorides
mg/L
N
N
250
<230
<230
14. Chlorine
(total residual)
mg/L
N
N
0.01
0.01
0.01
15. a.
Chromium
(trivalent)
See Note (5)
µg/L measured
as total
recoverable
Chromium
Y
N
Cr(III)exp(0.819
[lnH]+ 0.6848).
Cr(III)exp(0.81
9 [lnH]+
0.6848).
Cr(III)exp(0.
819 [lnH]+
0.6848).
Cr(III)exp(0.
819 [lnH]+
0.6848).
15. b.
Chromium
(hexavalent)
µg/L
Y
N
11
11
<11
11
16. Color, etc.
(see also
Minimum
Color, odor,
and taste
producing
N
N
Free from color,
odor, and taste
producing
Free from
color, odor,
and taste
Free from
color, odor,
and taste
Only such
amounts as
will not
Notes: (1) "*PP" means priority pollutant; (2) "**C" means Carcinogen; (3) "Annual avg" means the maximum
concentration at average annual flow conditions measured and represented as a 12 month moving average; (4)
"Max" means the maximum not to be exceeded at any time; (5) "ln H" means the natural logarithm of total hardness
expressed as milligrams/L of CaCO3. For metals criteria involving equations with hardness, the hardness shall be set
at 25 mg/L if actual hardness is <25 mg/L and set at 400 mg/L if actual hardness is >400 mg/L; (6) Criteria are
protective of human health not of aquatic life.
PARAMETER
UNITS
Criteria, Odor,
Phenols, etc.)
substances
and other
deleterious
substances,
including other
chemical
compounds
attributable to
domestic
wastes,
industrial
wastes and
other wastes.
17.
Micromhos
*PP
**C
Class I:
Potable Water
Supply
substances and
other deleterious
substances,
including other
chemical compounds
attributable to
domestic wastes,
industrial wastes and
other wastes.
N
N
Shall not be
Class II: Recreation, Propagation and
Maintenance of a Healthy, Well-Balanced
Population of Fish and Wildlife
SUBSUBSUBCLASS
CLASS
CLASS
2-A
2-C
2-B
Class III:
Agricultural
Purposes
producing
substances
and other
deleterious
substances,
including other
chemical
compounds
attributable to
domestic
wastes,
industrial
wastes and
other wastes.
render the
waters
unsuitable
for
agricultural
irrigation,
livestock
watering,
industrial
cooling,
industrial
process
water
supply
purposes,
or fish
survival.
See Section
12.3 (a) & (b)
of this Part.
producing
substances
and other
deleterious
substances,
including
other
chemical
compounds
attributable
to domestic
wastes,
industrial
wastes and
other
wastes.
Shall not be increased more
Notes: (1) "*PP" means priority pollutant; (2) "**C" means Carcinogen; (3) "Annual avg" means the maximum
concentration at average annual flow conditions measured and represented as a 12 month moving average; (4)
"Max" means the maximum not to be exceeded at any time; (5) "ln H" means the natural logarithm of total hardness
expressed as milligrams/L of CaCO3. For metals criteria involving equations with hardness, the hardness shall be set
at 25 mg/L if actual hardness is <25 mg/L and set at 400 mg/L if actual hardness is >400 mg/L; (6) Criteria are
protective of human health not of aquatic life.
PARAMETER
UNITS
*PP
**C
Class I:
Potable Water
Supply
increased more than
50% above
background or to
1275, whichever is
greater.
Class II: Recreation, Propagation and
Maintenance of a Healthy, Well-Balanced
Population of Fish and Wildlife
SUBSUBSUBCLASS
CLASS
CLASS
2-A
2-C
2-B
Class III:
Agricultural
Purposes
than 50% above background
or to 1275 whichever is
greater.
Shall not be
increased
more than
50% above
background
or to 1275,
whichever
is greater
See Section
12.3 (a) & (b)
of this Part.
Conductance,
Specific
(at 25
degrees
Celsius)
/cm
18. Copper
See Note (5)
µg/L
Y
N
Cu exp(0.8545[lnH]1.702).
Cu
exp(0.8545[ln
H]- 1.702).
Cu
exp(0.8545[
lnH]- 1.702)
exp(0.8545[
InH]-1.702)
19. Cyanide
µg/L
Y
N
5.2
5.2
5.2
5.2
20. Detergents
mg/L
N
N
0.5
0.5
0.5
0.5
21. 1,1Dichloroethyle
ne (1,1- Di-
µg/L
Y
Y
330 annual avg.
7100 annual
avg.
7100
annual avg.
Notes: (1) "*PP" means priority pollutant; (2) "**C" means Carcinogen; (3) "Annual avg" means the maximum
concentration at average annual flow conditions measured and represented as a 12 month moving average; (4)
"Max" means the maximum not to be exceeded at any time; (5) "ln H" means the natural logarithm of total hardness
expressed as milligrams/L of CaCO3. For metals criteria involving equations with hardness, the hardness shall be set
at 25 mg/L if actual hardness is <25 mg/L and set at 400 mg/L if actual hardness is >400 mg/L; (6) Criteria are
protective of human health not of aquatic life.
PARAMETER
UNITS
*PP
**C
Class I:
Potable Water
Supply
Class II: Recreation, Propagation and
Maintenance of a Healthy, Well-Balanced
Population of Fish and Wildlife
SUBSUBSUBCLASS
CLASS
CLASS
2-A
2-C
2-B
Class III:
Agricultural
Purposes
See Section
12.3 (a) & (b)
of this Part.
chloroethene)
22.
Dichlorometha
ne (methylene
chloride)
µg/L
Y
Y
4.65 annual avg.
590 annual
avg.
590 annual
avg.
23. 2,4Dinitrotoluene
µg/L
N
Y
0.11 annual avg.
3.4 annual
avg.
3.4 annual
avg.
24. Dioxin
(2,3,7,8 TCDD)
µg/L
Y
Y
5E-09
5.1E-09
4 5.1E-09
4 5.1E-09
25. Dissolved
Oxygen
(DO)
mg/L
N
N
Shall not be less
than 5.0. DO values
can be lower if
caused by natural
conditions. Normal
daily and seasonal
Shall not
average less
than 5.0 in a
24-hour
period. DO
values can be
Shall not
average
less than
5.0 in a 24hour period.
DO values
Shall not
average
less than
5.0 in a 24hour period.
DO values
Notes: (1) "*PP" means priority pollutant; (2) "**C" means Carcinogen; (3) "Annual avg" means the maximum
concentration at average annual flow conditions measured and represented as a 12 month moving average; (4)
"Max" means the maximum not to be exceeded at any time; (5) "ln H" means the natural logarithm of total hardness
expressed as milligrams/L of CaCO3. For metals criteria involving equations with hardness, the hardness shall be set
at 25 mg/L if actual hardness is <25 mg/L and set at 400 mg/L if actual hardness is >400 mg/L; (6) Criteria are
protective of human health not of aquatic life.
PARAMETER
UNITS
*PP
**C
Class I:
Potable Water
Supply
fluctuations above
these levels shall be
maintained.
26. Dissolved
Solids
mg/L
N
N
500 as a monthly
avg.; 1,000 max.
27. Fluorides
mg/L
N
N
1.5
Class II: Recreation, Propagation and
Maintenance of a Healthy, Well-Balanced
Population of Fish and Wildlife
SUBSUBSUBCLASS
CLASS
CLASS
2-A
2-C
2-B
Class III:
Agricultural
Purposes
lower if
caused by
natural
conditions.
Normal daily
and seasonal
fluctuations
above these
levels shall be
maintained.
can be
lower if
caused by
natural
conditions.
Normal
daily and
seasonal
fluctuations
above
these levels
shall be
maintained.
can be
lower if
caused by
natural
conditions.
Normal
daily and
seasonal
fluctuations
above
these levels
shall be
maintained.
10.0
10.0
10.0
See Section
12.3 (a) & (b)
of this Part.
28. "Free
Notes: (1) "*PP" means priority pollutant; (2) "**C" means Carcinogen; (3) "Annual avg" means the maximum
concentration at average annual flow conditions measured and represented as a 12 month moving average; (4)
"Max" means the maximum not to be exceeded at any time; (5) "ln H" means the natural logarithm of total hardness
expressed as milligrams/L of CaCO3. For metals criteria involving equations with hardness, the hardness shall be set
at 25 mg/L if actual hardness is <25 mg/L and set at 400 mg/L if actual hardness is >400 mg/L; (6) Criteria are
protective of human health not of aquatic life.
PARAMETER
UNITS
*PP
**C
Class I:
Potable Water
Supply
Class II: Recreation, Propagation and
Maintenance of a Healthy, Well-Balanced
Population of Fish and Wildlife
SUBSUBSUBCLASS
CLASS
CLASS
2-A
2-C
2-B
Class III:
Agricultural
Purposes
See Section
12.3 (a) & (b)
of this Part.
Froms"
(see minimum
criteria in
section 12.3 of
this Part)
29.
Halomethanes
µg/L
Y
Y
30. a.
Bromoform
µg/L
Y
Y
4.3
140
140
30. b.
Chlorodibromo
methane
µg/L
Y
Y
0.41
13
13
30. c.
Chloroform
µg/L
Y
Y
5.7
470
470
30. d.
Dichlorobro-
µg/L
Y
Y
0.55
17
17
Notes: (1) "*PP" means priority pollutant; (2) "**C" means Carcinogen; (3) "Annual avg" means the maximum
concentration at average annual flow conditions measured and represented as a 12 month moving average; (4)
"Max" means the maximum not to be exceeded at any time; (5) "ln H" means the natural logarithm of total hardness
expressed as milligrams/L of CaCO3. For metals criteria involving equations with hardness, the hardness shall be set
at 25 mg/L if actual hardness is <25 mg/L and set at 400 mg/L if actual hardness is >400 mg/L; (6) Criteria are
protective of human health not of aquatic life.
PARAMETER
UNITS
*PP
**C
Class I:
Potable Water
Supply
Class II: Recreation, Propagation and
Maintenance of a Healthy, Well-Balanced
Population of Fish and Wildlife
SUBSUBSUBCLASS
CLASS
CLASS
2-A
2-C
2-B
Class III:
Agricultural
Purposes
See Section
12.3 (a) & (b)
of this Part.
momethane
30. e. Methyl
Bromide
µg/L
Y
Y
47
1500
1500
30. f.
Dichlorodifluoromethane
µg/L
N
Y
6,900
570,000
570,000
31.
Hexachlorobutadiene
µg/L
Y
Y
.44
18
18
µg/L
Y
N
Pbexp(1.273[I
nH]-4.705).
Pbexp(1.27
3[InH]4.705).
32. Imbalance
(see Nutrients)
33. Lead
See Note (5)
Pbexp(1.273[InH]4.705).
Pbexp(1.27
3[InH]4.705).
Notes: (1) "*PP" means priority pollutant; (2) "**C" means Carcinogen; (3) "Annual avg" means the maximum
concentration at average annual flow conditions measured and represented as a 12 month moving average; (4)
"Max" means the maximum not to be exceeded at any time; (5) "ln H" means the natural logarithm of total hardness
expressed as milligrams/L of CaCO3. For metals criteria involving equations with hardness, the hardness shall be set
at 25 mg/L if actual hardness is <25 mg/L and set at 400 mg/L if actual hardness is >400 mg/L; (6) Criteria are
protective of human health not of aquatic life.
PARAMETER
UNITS
*PP
**C
Class I:
Potable Water
Supply
34. Mercury
µg/L
Y
N
0.012
35. Nickel
See Note (5)
µg/L
Y
N
36. Nitrate
mg/L
N
37. Nuisance
Species
N/A
N
Class II: Recreation, Propagation and
Maintenance of a Healthy, Well-Balanced
Population of Fish and Wildlife
SUBSUBSUBCLASS
CLASS
CLASS
2-A
2-C
2-B
See Section
12.3 (a) & (b)
of this Part.
Class III:
Agricultural
Purposes
0.012
0.012
0.2
Niexp(0.846[lnH]+
0.0584).
Niexp(0.846[ln
H]+0.0584).
Niexp(0.846 exp(0.846[I
[lnH]+
nH]+
0.0584).
0.0584)
N
10
Shall not be found in
concentrations which cause
an imbalance in natural
populations of aquatic flora
or fauna.
N
Substances in
concentrations which
result in the
dominance of
nuisance species:
none shall be
present.
Substances in concentrations which result
in the dominance of nuisance species:
none shall be present.
Notes: (1) "*PP" means priority pollutant; (2) "**C" means Carcinogen; (3) "Annual avg" means the maximum
concentration at average annual flow conditions measured and represented as a 12 month moving average; (4)
"Max" means the maximum not to be exceeded at any time; (5) "ln H" means the natural logarithm of total hardness
expressed as milligrams/L of CaCO3. For metals criteria involving equations with hardness, the hardness shall be set
at 25 mg/L if actual hardness is <25 mg/L and set at 400 mg/L if actual hardness is >400 mg/L; (6) Criteria are
protective of human health not of aquatic life.
PARAMETER
UNITS
*PP
**C
Class I:
Potable Water
Supply
38. (a)
Nutrients
N/A
N
N
The discharge of
nutrients shall
continue to be limited
as needed to prevent
violations of other
standards contained
in this chapter or
other applicable
Water Quality
Standards imposed
by law.
38. (b)
Nutrients
N/A
N
N
In no case shall
nutrient
concentrations of a
body of water be
altered so as to
cause an imbalance
in natural populations
Class II: Recreation, Propagation and
Maintenance of a Healthy, Well-Balanced
Population of Fish and Wildlife
SUBSUBSUBCLASS
CLASS
CLASS
2-A
2-C
2-B
See Section
12.3 (a) & (b)
of this Part.
Class III:
Agricultural
Purposes
The discharge of nutrients shall continue to
be limited as needed to prevent violations
of other standards contained in this chapter
or other applicable Water Quality
Standards imposed by law.
In no case shall nutrient concentrations of
a body of water be altered so as to cause
an imbalance in natural populations of
aquatic flora or fauna.
Notes: (1) "*PP" means priority pollutant; (2) "**C" means Carcinogen; (3) "Annual avg" means the maximum
concentration at average annual flow conditions measured and represented as a 12 month moving average; (4)
"Max" means the maximum not to be exceeded at any time; (5) "ln H" means the natural logarithm of total hardness
expressed as milligrams/L of CaCO3. For metals criteria involving equations with hardness, the hardness shall be set
at 25 mg/L if actual hardness is <25 mg/L and set at 400 mg/L if actual hardness is >400 mg/L; (6) Criteria are
protective of human health not of aquatic life.
PARAMETER
UNITS
*PP
**C
Class I:
Potable Water
Supply
of aquatic flora or
fauna.
Class II: Recreation, Propagation and
Maintenance of a Healthy, Well-Balanced
Population of Fish and Wildlife
SUBSUBSUBCLASS
CLASS
CLASS
2-A
2-C
2-B
Class III:
Agricultural
Purposes
Dissolved
or
emulsified
oils and
greases
shall not
exceed 5.0
See Section
12.3 (a) & (b)
of this Part.
39. (a) Oils
and Greases
mg/L
N
N
Dissolved or
emulsified oils and
greases shall not
exceed 5.0
Dissolved or
emulsified oils
and greases
shall not
exceed 5.0
Dissolved
or
emulsified
oils and
greases
shall not
exceed 5.0
39. (b) Oils
and Greases
mg/L
N
N
No undissolved oil, or
visible oil defined as
iridescence, shall be
present so as to
cause taste or odor,
or otherwise interfere
with the beneficial
use of Reservation
No undissolved oil, or visible oil defined as
iridescence, shall be present so as to
cause taste or odor, or otherwise interfere
with the beneficial use of Reservation
waters.
Notes: (1) "*PP" means priority pollutant; (2) "**C" means Carcinogen; (3) "Annual avg" means the maximum
concentration at average annual flow conditions measured and represented as a 12 month moving average; (4)
"Max" means the maximum not to be exceeded at any time; (5) "ln H" means the natural logarithm of total hardness
expressed as milligrams/L of CaCO3. For metals criteria involving equations with hardness, the hardness shall be set
at 25 mg/L if actual hardness is <25 mg/L and set at 400 mg/L if actual hardness is >400 mg/L; (6) Criteria are
protective of human health not of aquatic life.
PARAMETER
UNITS
*PP
**C
Class I:
Potable Water
Supply
waters.
Class II: Recreation, Propagation and
Maintenance of a Healthy, Well-Balanced
Population of Fish and Wildlife
SUBSUBSUBCLASS
CLASS
CLASS
2-A
2-C
2-B
Class III:
Agricultural
Purposes
See Section
12.3 (a) & (b)
of this Part.
40. Pesticides
and
Herbicides
40.a. 2,4,5-T
Trichlorophen
oxyacetic acid
µg/L
Y
Y
10
40.b. 2,4-D
Dichloropheno
xyacetic acid
µg/L
Y
Y
100
None
None
40.c. Aldrin
µg/L
Y
Y
0.0000049 annual
avg.; 3.0 max
0.00005
annual avg;
3.0 max
0.00005
annual avg;
3.0 max
40.d. Atrazine
µg/L
N
N
<25
<1.0
<1.0
40.e. Beta-
µg/L
Y
Y
0.0091annual avg.
0.017 annual
0.017
Notes: (1) "*PP" means priority pollutant; (2) "**C" means Carcinogen; (3) "Annual avg" means the maximum
concentration at average annual flow conditions measured and represented as a 12 month moving average; (4)
"Max" means the maximum not to be exceeded at any time; (5) "ln H" means the natural logarithm of total hardness
expressed as milligrams/L of CaCO3. For metals criteria involving equations with hardness, the hardness shall be set
at 25 mg/L if actual hardness is <25 mg/L and set at 400 mg/L if actual hardness is >400 mg/L; (6) Criteria are
protective of human health not of aquatic life.
PARAMETER
UNITS
*PP
**C
Class I:
Potable Water
Supply
Class II: Recreation, Propagation and
Maintenance of a Healthy, Well-Balanced
Population of Fish and Wildlife
SUBSUBSUBCLASS
CLASS
CLASS
2-A
2-C
2-B
See Section
12.3 (a) & (b)
of this Part.
hexachlorocycl
o-hexane (bBHC)
avg.
annual avg.
40.f. Bromacil
µg/L
Y
Y
100 annual avg.
100 annual
avg.
100 annual
avg.
40.g.
Chlordane
µg/L
Y
Y
0.0008 annual avg.
0.0043 max.
0.00081
annual avg.
0.0043 max.
0.00081
annual avg.
0.0043
max.
40.h.
Chlorpyrifos
µg/L
N
N
.041
.041
.041
40.i.
Dichlorodiphe
nyltrichloroethane (DDT)
µg/L
Y
Y
0.00022 annual avg.;
0.001 max.
0.00022
annual avg.
0.001 max.
0.00022
annual avg.
0.001 max.
40.j. Demeton
µg/L
N
N
0.1
0.1
0.1
Class III:
Agricultural
Purposes
Notes: (1) "*PP" means priority pollutant; (2) "**C" means Carcinogen; (3) "Annual avg" means the maximum
concentration at average annual flow conditions measured and represented as a 12 month moving average; (4)
"Max" means the maximum not to be exceeded at any time; (5) "ln H" means the natural logarithm of total hardness
expressed as milligrams/L of CaCO3. For metals criteria involving equations with hardness, the hardness shall be set
at 25 mg/L if actual hardness is <25 mg/L and set at 400 mg/L if actual hardness is >400 mg/L; (6) Criteria are
protective of human health not of aquatic life.
PARAMETER
UNITS
*PP
**C
Class I:
Potable Water
Supply
Class II: Recreation, Propagation and
Maintenance of a Healthy, Well-Balanced
Population of Fish and Wildlife
SUBSUBSUBCLASS
CLASS
CLASS
2-A
2-C
2-B
Class III:
Agricultural
Purposes
See Section
12.3 (a) & (b)
of this Part.
40.k. Dieldrin
µg/L
Y
Y
.0.000052 annual
avg.; 0.056 max
0.000052
annual avg.;
0.056 max.
0.000052
annual
avg.; 0.056
max
40.l. Diuron
µg/L
Y
Y
2.0 annual avg.
2.0 annual
avg.
2.0 annual
avg.
40.m.
Endosulfan
µg/L
Y
N
0.056
0.056
0.056
40.n. Endrin
µg/L
Y
0.036
0.036
40.o. Ethion
µg/L
Y
N
60 annual avg.
60 annual avg. 60 annual
avg.
40.p. Guthion
µg/L
N
N
0.01
0.01
0.01
40.q.
Heptachlor
µg/L
Y
Y
0.000079 annual
avg.
0.000079
annual avg;
0.0038 max
0.000079
annual avg;
0.0038 max
Notes: (1) "*PP" means priority pollutant; (2) "**C" means Carcinogen; (3) "Annual avg" means the maximum
concentration at average annual flow conditions measured and represented as a 12 month moving average; (4)
"Max" means the maximum not to be exceeded at any time; (5) "ln H" means the natural logarithm of total hardness
expressed as milligrams/L of CaCO3. For metals criteria involving equations with hardness, the hardness shall be set
at 25 mg/L if actual hardness is <25 mg/L and set at 400 mg/L if actual hardness is >400 mg/L; (6) Criteria are
protective of human health not of aquatic life.
PARAMETER
UNITS
*PP
**C
Class I:
Potable Water
Supply
Class II: Recreation, Propagation and
Maintenance of a Healthy, Well-Balanced
Population of Fish and Wildlife
SUBSUBSUBCLASS
CLASS
CLASS
2-A
2-C
2-B
Class III:
Agricultural
Purposes
See Section
12.3 (a) & (b)
of this Part.
40.r. Lindane
(a-benzene
hexachloride)
µg/L
Y
N
0.0026 annual avg.
0.0049 annual
avg.
0.0049
annual avg.
40.s. Lindane
(b-benzene
hexachloride)
µg/L
Y
N
0.0091 annual avg.
0.017 annual
avg.
0.017
annual avg.
40.t. Lindane
(g-benzene
hexachloride)
µg/L
Y
N
0.98 annual avg.
1.8 annual
avg.
1.8 annual
avg.
40.u.
Malathion
µg/L
N
N
0.1
0.1
0.1
40.v.
Methoxychlor
µg/L
N
N
0.03
0.03
0.03
40.w. Mirex
µg/L
N
N
0.001
0.001
0.001
Notes: (1) "*PP" means priority pollutant; (2) "**C" means Carcinogen; (3) "Annual avg" means the maximum
concentration at average annual flow conditions measured and represented as a 12 month moving average; (4)
"Max" means the maximum not to be exceeded at any time; (5) "ln H" means the natural logarithm of total hardness
expressed as milligrams/L of CaCO3. For metals criteria involving equations with hardness, the hardness shall be set
at 25 mg/L if actual hardness is <25 mg/L and set at 400 mg/L if actual hardness is >400 mg/L; (6) Criteria are
protective of human health not of aquatic life.
PARAMETER
UNITS
*PP
**C
Class I:
Potable Water
Supply
Class II: Recreation, Propagation and
Maintenance of a Healthy, Well-Balanced
Population of Fish and Wildlife
SUBSUBSUBCLASS
CLASS
CLASS
2-A
2-C
2-B
Class III:
Agricultural
Purposes
See Section
12.3 (a) & (b)
of this Part.
40.x.
Parathion
µg/L
N
N
0.013
0.013
0.013
40.y.
Toxaphene
µg/L
Y
Y
0.002
0.002
0.002
41. pH
Standard Units
N
N
Shall not vary more
than one unit above
or below natural
background provided
that the pH is not
lowered to less than
6 units or raised
above 8.5 units. If
natural background
is less than 6 units,
the pH shall not vary
below natural
background or vary
Shall not vary more than one unit above or
below natural background provided that the
pH is not lowered to less than 6 units or
raised above 8.5 units. If natural
background is less than 6 units, the pH
shall not vary below natural background or
vary more than one unit above natural
background. If natural background is
higher than 8.5 units, the pH shall not vary
above natural background or vary more
than one unit below background.
Notes: (1) "*PP" means priority pollutant; (2) "**C" means Carcinogen; (3) "Annual avg" means the maximum
concentration at average annual flow conditions measured and represented as a 12 month moving average; (4)
"Max" means the maximum not to be exceeded at any time; (5) "ln H" means the natural logarithm of total hardness
expressed as milligrams/L of CaCO3. For metals criteria involving equations with hardness, the hardness shall be set
at 25 mg/L if actual hardness is <25 mg/L and set at 400 mg/L if actual hardness is >400 mg/L; (6) Criteria are
protective of human health not of aquatic life.
PARAMETER
UNITS
*PP
**C
Class I:
Potable Water
Supply
more than one unit
above natural
background. If
natural background
is higher than 8.5
units, the pH shall
not vary above
natural background
or vary more than
one unit below
background.
41 a. Phenolic
compounds:
Total
Y
N
Phenolic compounds
other than those
produced by the
natural decay of
plant material, listed
or unlisted, shall not
taint the flesh of
Class II: Recreation, Propagation and
Maintenance of a Healthy, Well-Balanced
Population of Fish and Wildlife
SUBSUBSUBCLASS
CLASS
CLASS
2-A
2-C
2-B
Class III:
Agricultural
Purposes
See Section
12.3 (a) & (b)
of this Part.
Phenolic compounds other than those
produced by the natural decay of plant
material, listed or unlisted, shall not taint
the flesh of edible fish or shellfish or
produce objectionable taste or odor in a
drinking water supply.
Notes: (1) "*PP" means priority pollutant; (2) "**C" means Carcinogen; (3) "Annual avg" means the maximum
concentration at average annual flow conditions measured and represented as a 12 month moving average; (4)
"Max" means the maximum not to be exceeded at any time; (5) "ln H" means the natural logarithm of total hardness
expressed as milligrams/L of CaCO3. For metals criteria involving equations with hardness, the hardness shall be set
at 25 mg/L if actual hardness is <25 mg/L and set at 400 mg/L if actual hardness is >400 mg/L; (6) Criteria are
protective of human health not of aquatic life.
PARAMETER
UNITS
*PP
**C
Class I:
Potable Water
Supply
edible fish or
shellfish or produce
objectionable taste or
odor in a drinking
water supply.
41. b. Phenolic µg/L
compounds:
Total
Y
N
1. The total of all
chlorinated phenols,
and chlorinated
cresols, except as
set forth in (c) 1. to
(c) 8. below, shall not
exceed 1.0 unless
higher values are
shown not to be
chronically toxic.
Such higher values
shall be approved in
writing by the
Class II: Recreation, Propagation and
Maintenance of a Healthy, Well-Balanced
Population of Fish and Wildlife
SUBSUBSUBCLASS
CLASS
CLASS
2-A
2-C
2-B
Class III:
Agricultural
Purposes
See Section
12.3 (a) & (b)
of this Part.
1. The total of all chlorinated phenols, and
chlorinated cresols, except
as set forth in (c) 1. To (c) 8. below, shall
not exceed 1.0 unless higher
values are shown not to be chronically
toxic. Such higher values shall be
approved in writing by the Commission.
2. The compounds listed in (c)1. to (c) 8.
below shall not exceed the limits specified
for each compound.
Notes: (1) "*PP" means priority pollutant; (2) "**C" means Carcinogen; (3) "Annual avg" means the maximum
concentration at average annual flow conditions measured and represented as a 12 month moving average; (4)
"Max" means the maximum not to be exceeded at any time; (5) "ln H" means the natural logarithm of total hardness
expressed as milligrams/L of CaCO3. For metals criteria involving equations with hardness, the hardness shall be set
at 25 mg/L if actual hardness is <25 mg/L and set at 400 mg/L if actual hardness is >400 mg/L; (6) Criteria are
protective of human health not of aquatic life.
PARAMETER
UNITS
*PP
**C
Class I:
Potable Water
Supply
Commission.
2. The compounds
listed in (c)1. to (c) 8.
below shall not
exceed the limits
specified for each
compound.
Class II: Recreation, Propagation and
Maintenance of a Healthy, Well-Balanced
Population of Fish and Wildlife
SUBSUBSUBCLASS
CLASS
CLASS
2-A
2-C
2-B
Class III:
Agricultural
Purposes
See Section
12.3 (a) & (b)
of this Part.
41. c.1.
Phenolic
compound: 2chlorophenol
µg/L
Y
N
81
150
See Note (6)
150
See Note
(6)
150
See Note
(6)
41. c.2.
Phenolic
compound:
2,4dichlorophenol
µg/L
Y
N
77
See Note (6)
290
See Note (6)
290
See Note
(6)
290
See Note
(6)
Notes: (1) "*PP" means priority pollutant; (2) "**C" means Carcinogen; (3) "Annual avg" means the maximum
concentration at average annual flow conditions measured and represented as a 12 month moving average; (4)
"Max" means the maximum not to be exceeded at any time; (5) "ln H" means the natural logarithm of total hardness
expressed as milligrams/L of CaCO3. For metals criteria involving equations with hardness, the hardness shall be set
at 25 mg/L if actual hardness is <25 mg/L and set at 400 mg/L if actual hardness is >400 mg/L; (6) Criteria are
protective of human health not of aquatic life.
PARAMETER
UNITS
*PP
**C
Class I:
Potable Water
Supply
Class II: Recreation, Propagation and
Maintenance of a Healthy, Well-Balanced
Population of Fish and Wildlife
SUBSUBSUBCLASS
CLASS
CLASS
2-A
2-C
2-B
Class III:
Agricultural
Purposes
See Section
12.3 (a) & (b)
of this Part.
41. c.3
Phenolic
compound:
2,4dimethylpheno
l
µg/L
Y
N
380
See Note (6)
850
See Note (6)
850
See Note
(6)
850
See Note
(6)
41. c.4
Phenolic
compound: 2methyl-4,6dinitrophenol
µg/L
Y
N
13
See Note (6)
280
See Note (6)
280
See Note
(6)
280
See Note
(6)
41. c.5
Phenolic
compound:
pentachlorophenol
µg/L
Y
N
30 max;
0.27 annual avg;
e(1.005[pH]-5.29)
30 max;
3 annual avg;
e(1.005[pH]5.29)
30 max;
3 annual
avg;
e(1.005[pH]
-5.29)
30 max;
3 annual
avg;
e(1.005[pH]
-5.29)
Notes: (1) "*PP" means priority pollutant; (2) "**C" means Carcinogen; (3) "Annual avg" means the maximum
concentration at average annual flow conditions measured and represented as a 12 month moving average; (4)
"Max" means the maximum not to be exceeded at any time; (5) "ln H" means the natural logarithm of total hardness
expressed as milligrams/L of CaCO3. For metals criteria involving equations with hardness, the hardness shall be set
at 25 mg/L if actual hardness is <25 mg/L and set at 400 mg/L if actual hardness is >400 mg/L; (6) Criteria are
protective of human health not of aquatic life.
PARAMETER
UNITS
*PP
**C
Class I:
Potable Water
Supply
Class II: Recreation, Propagation and
Maintenance of a Healthy, Well-Balanced
Population of Fish and Wildlife
SUBSUBSUBCLASS
CLASS
CLASS
2-A
2-C
2-B
Class III:
Agricultural
Purposes
See Section
12.3 (a) & (b)
of this Part.
41. c.6
Phenolic
compound:
2,4,6trichlorophenol
µg/L
Y
N
1.4 annual avg.
2.4 annual
avg.
2.4 annual
avg.
2.4 annual
avg.
41. c.7
Phenolic
compound:
2,4dinitrophenol
mg/L
Y
N
0.0697
See Note (6)
5.3 See Note
(6)
5.3 See
Note (6)
5.3 See
Note (6)
41. c.8
Phenolic
compound:
Phenol
mg/L
Y
N
0.3
0.3
0.3
0.3
43. Phthalate
Esters
µg/L
Y
N
Notes: (1) "*PP" means priority pollutant; (2) "**C" means Carcinogen; (3) "Annual avg" means the maximum
concentration at average annual flow conditions measured and represented as a 12 month moving average; (4)
"Max" means the maximum not to be exceeded at any time; (5) "ln H" means the natural logarithm of total hardness
expressed as milligrams/L of CaCO3. For metals criteria involving equations with hardness, the hardness shall be set
at 25 mg/L if actual hardness is <25 mg/L and set at 400 mg/L if actual hardness is >400 mg/L; (6) Criteria are
protective of human health not of aquatic life.
PARAMETER
UNITS
*PP
**C
Class I:
Potable Water
Supply
Class II: Recreation, Propagation and
Maintenance of a Healthy, Well-Balanced
Population of Fish and Wildlife
SUBSUBSUBCLASS
CLASS
CLASS
2-A
2-C
2-B
Class III:
Agricultural
Purposes
See Section
12.3 (a) & (b)
of this Part.
43. a. Bis(2Ethylhexyl)
Phthalate
µg/L
Y
N
1.2
See Note (6)
2.2
See Note (6)
2.2
See Note
(6)
43. b.
Butylbenzyl
Phthalate
µg/L
Y
N
1500
See Note (6)
1900
See Note (6)
1900
See Note
(6)
43. c. Diethyl
Phthalate
µg/L
Y
N
17000
See Note (6)
44000
See Note (6)
44000
See Note
(6)
43. d.
Dimethyl
Phthalate
µg/L
Y
N
270000
See Note (6)
1100000
See Note (6)
1100000
See Note
(6)
43. e. Dibutyl
Phthalate
µg/L
Y
N
2000
See Note (6)
4500
See Note (6)
4500
See Note
(6)
44. Polychlori-
µg/L
Y
Y
0.000064 annual
0.000064
0.000064
Notes: (1) "*PP" means priority pollutant; (2) "**C" means Carcinogen; (3) "Annual avg" means the maximum
concentration at average annual flow conditions measured and represented as a 12 month moving average; (4)
"Max" means the maximum not to be exceeded at any time; (5) "ln H" means the natural logarithm of total hardness
expressed as milligrams/L of CaCO3. For metals criteria involving equations with hardness, the hardness shall be set
at 25 mg/L if actual hardness is <25 mg/L and set at 400 mg/L if actual hardness is >400 mg/L; (6) Criteria are
protective of human health not of aquatic life.
PARAMETER
UNITS
*PP
**C
nated
Biphenols
(PCBs)
Class I:
Potable Water
Supply
avg.; 0.014 max
Class II: Recreation, Propagation and
Maintenance of a Healthy, Well-Balanced
Population of Fish and Wildlife
SUBSUBSUBCLASS
CLASS
CLASS
2-A
2-C
2-B
See Section
12.3 (a) & (b)
of this Part.
annual avg;
0.014 max
annual avg;
0.014 max
45. Polycyclic
Aromatic
Hydrocarbons
(PAHs)
µg/L
Y
Y
45. a.
Anthracene
µg/L
Y
Y
8300
See Note (6)
40000
See Note (6)
40000
See Note
(6)
45. b.
Benzo(a)Anthr
acene
µg/L
Y
Y
0.0038
See Note (6)
0.018
See Note (6)
0.018
See Note
(6)
45. c.
Benzo(a)Pyre
ne
µg/L
Y
Y
0.0038
See Note (6)
0.018
See Note (6)
0.018
See Note
(6)
Class III:
Agricultural
Purposes
Notes: (1) "*PP" means priority pollutant; (2) "**C" means Carcinogen; (3) "Annual avg" means the maximum
concentration at average annual flow conditions measured and represented as a 12 month moving average; (4)
"Max" means the maximum not to be exceeded at any time; (5) "ln H" means the natural logarithm of total hardness
expressed as milligrams/L of CaCO3. For metals criteria involving equations with hardness, the hardness shall be set
at 25 mg/L if actual hardness is <25 mg/L and set at 400 mg/L if actual hardness is >400 mg/L; (6) Criteria are
protective of human health not of aquatic life.
PARAMETER
UNITS
*PP
**C
Class I:
Potable Water
Supply
Class II: Recreation, Propagation and
Maintenance of a Healthy, Well-Balanced
Population of Fish and Wildlife
SUBSUBSUBCLASS
CLASS
CLASS
2-A
2-C
2-B
Class III:
Agricultural
Purposes
See Section
12.3 (a) & (b)
of this Part.
45. d.
Chrysene
µg/L
Y
Y
0.0038
See Note (6)
0.018
See Note (6)
0.018
See Note
(6)
45. e.
Dibenzo(a,h)A
nthracene
µg/L
Y
Y
0.0038
See Note (6)
0.018
See Note (6)
0.018
See Note
(6)
45. f.
Fluoranthene
µg/L
Y
Y
130
See Note (6)
140
See Note (6)
140
See Note
(6)
45. g.
Fluorene
µg/L
Y
Y
1100
See Note (6)
5300
See Note (6)
5300
See Note
(6)
45. h.
Indeno(1,2,3cd)
Pyrene
µg/L
Y
Y
0.0038
See Note (6)
0.018
See Note (6)
0.018
See Note
(6)
Notes: (1) "*PP" means priority pollutant; (2) "**C" means Carcinogen; (3) "Annual avg" means the maximum
concentration at average annual flow conditions measured and represented as a 12 month moving average; (4)
"Max" means the maximum not to be exceeded at any time; (5) "ln H" means the natural logarithm of total hardness
expressed as milligrams/L of CaCO3. For metals criteria involving equations with hardness, the hardness shall be set
at 25 mg/L if actual hardness is <25 mg/L and set at 400 mg/L if actual hardness is >400 mg/L; (6) Criteria are
protective of human health not of aquatic life.
PARAMETER
UNITS
*PP
**C
Class I:
Potable Water
Supply
Class II: Recreation, Propagation and
Maintenance of a Healthy, Well-Balanced
Population of Fish and Wildlife
SUBSUBSUBCLASS
CLASS
CLASS
2-A
2-C
2-B
Class III:
Agricultural
Purposes
See Section
12.3 (a) & (b)
of this Part.
45. i. Pyrene
µg/L
Y
Y
830
See Note (6)
4000
See Note (6)
4000
See Note
(6)
45. j.
Acenaphthene
µg/L
Y
Y
1,200
27,000
27,000
45. k.
Benzo(k)Fluor
anthene
µg/L
Y
Y
0.0038
0.018
0.018
45. l. 3,4
Benzo(b)Fluor
anthene
µg/l
Y
Y
0.0038
0.018
0.018
46.
Radioactive
substances
Picocuries/L
N
Y
15
15
15
15
Notes: (1) "*PP" means priority pollutant; (2) "**C" means Carcinogen; (3) "Annual avg" means the maximum
concentration at average annual flow conditions measured and represented as a 12 month moving average; (4)
"Max" means the maximum not to be exceeded at any time; (5) "ln H" means the natural logarithm of total hardness
expressed as milligrams/L of CaCO3. For metals criteria involving equations with hardness, the hardness shall be set
at 25 mg/L if actual hardness is <25 mg/L and set at 400 mg/L if actual hardness is >400 mg/L; (6) Criteria are
protective of human health not of aquatic life.
PARAMETER
UNITS
*PP
**C
Class I:
Potable Water
Supply
Class II: Recreation, Propagation and
Maintenance of a Healthy, Well-Balanced
Population of Fish and Wildlife
SUBSUBSUBCLASS
CLASS
CLASS
2-A
2-C
2-B
Class III:
Agricultural
Purposes
See Section
12.3 (a) & (b)
of this Part.
(Gross alpha
particle activity
including
radium 226,
but excluding
radon and
uranium)
47. Selenium
µg/L
Y
N
5.0
5.0
5.0
48. Silver
See Note (5)
(applies within
mixing zones)
µg/L
Y
N
exp(1.72[InH]-6.59)
exp(1.72[InH]6.59).
exp(1.72[In
H]-6.59).
49.
Substances in
concentrations
which injure,
are chronically
N/A
N
N
NONE SHALL BE
PRESENT
NONE SHALL BE PRESENT
exp(1.72[In
H]-6.59).
Notes: (1) "*PP" means priority pollutant; (2) "**C" means Carcinogen; (3) "Annual avg" means the maximum
concentration at average annual flow conditions measured and represented as a 12 month moving average; (4)
"Max" means the maximum not to be exceeded at any time; (5) "ln H" means the natural logarithm of total hardness
expressed as milligrams/L of CaCO3. For metals criteria involving equations with hardness, the hardness shall be set
at 25 mg/L if actual hardness is <25 mg/L and set at 400 mg/L if actual hardness is >400 mg/L; (6) Criteria are
protective of human health not of aquatic life.
PARAMETER
UNITS
*PP
**C
Class I:
Potable Water
Supply
Class II: Recreation, Propagation and
Maintenance of a Healthy, Well-Balanced
Population of Fish and Wildlife
SUBSUBSUBCLASS
CLASS
CLASS
2-A
2-C
2-B
Class III:
Agricultural
Purposes
See Section
12.3 (a) & (b)
of this Part.
toxic to, or
produce
adverse
physiological
or behavioral
response in
humans,
plants, or
animals.
50. 1,1,2,2Tetrachloroethane
µg/L
Y
Y
0.17 annual avg.
4 annual avg.
4 annual
avg.
51.
Tetrachloroeth
ylene
(1,1,2,2-)
tetrachloroeth
µg/L
Y
Y
0.69 annual avg.
3.3 annual
avg.
3.3 annual
avg.
3.0 max.
Notes: (1) "*PP" means priority pollutant; (2) "**C" means Carcinogen; (3) "Annual avg" means the maximum
concentration at average annual flow conditions measured and represented as a 12 month moving average; (4)
"Max" means the maximum not to be exceeded at any time; (5) "ln H" means the natural logarithm of total hardness
expressed as milligrams/L of CaCO3. For metals criteria involving equations with hardness, the hardness shall be set
at 25 mg/L if actual hardness is <25 mg/L and set at 400 mg/L if actual hardness is >400 mg/L; (6) Criteria are
protective of human health not of aquatic life.
PARAMETER
UNITS
*PP
**C
Class I:
Potable Water
Supply
Class II: Recreation, Propagation and
Maintenance of a Healthy, Well-Balanced
Population of Fish and Wildlife
SUBSUBSUBCLASS
CLASS
CLASS
2-A
2-C
2-B
Class III:
Agricultural
Purposes
See Section
12.3 (a) & (b)
of this Part.
ene
52. Thallium
µg/L
Y
N
0.24
0.47
0.47
53. Thermal
Criteria
F.
N
N
Heated water
discharges shall not
increase the
temperature of the
Receiving Body of
Water (RBW) so as
to cause substantial
damage or harm to
the aquatic life or
vegetation therein or
interfere with the
beneficial uses
assigned to the
RBW. Heated water
sources proposed for
Heated water discharges
shall not increase the
temperature of the Receiving
Body of Water (RBW) so as
to cause substantial damage
or harm to the aquatic life or
vegetation therein or
interfere with the beneficial
uses assigned to the RBW.
Heated water sources
proposed for future
discharges into an RBW
shall not be more than 5
degrees F. higher than the
existing temperature of any
Notes: (1) "*PP" means priority pollutant; (2) "**C" means Carcinogen; (3) "Annual avg" means the maximum
concentration at average annual flow conditions measured and represented as a 12 month moving average; (4)
"Max" means the maximum not to be exceeded at any time; (5) "ln H" means the natural logarithm of total hardness
expressed as milligrams/L of CaCO3. For metals criteria involving equations with hardness, the hardness shall be set
at 25 mg/L if actual hardness is <25 mg/L and set at 400 mg/L if actual hardness is >400 mg/L; (6) Criteria are
protective of human health not of aquatic life.
PARAMETER
UNITS
*PP
**C
Class I:
Potable Water
Supply
future discharges
into an RBW shall
not be more than 5
degrees F. higher
than the existing
temperature of any
receiving water at a
location which is
unaffected by
manmade thermal
discharges and is of
typical depth and
exposure to winds
and currents.
54. Total
Dissolved
Gases
Percent of the
saturation
value for gases
at the existing
N
N
110% of saturation
value
Class II: Recreation, Propagation and
Maintenance of a Healthy, Well-Balanced
Population of Fish and Wildlife
SUBSUBSUBCLASS
CLASS
CLASS
2-A
2-C
2-B
See Section
12.3 (a) & (b)
of this Part.
Class III:
Agricultural
Purposes
receiving water at a location
which is unaffected by
manmade thermal
discharges and is of typical
depth and exposure to winds
and currents.
110% of
saturation
value
110% of
saturation
value
Notes: (1) "*PP" means priority pollutant; (2) "**C" means Carcinogen; (3) "Annual avg" means the maximum
concentration at average annual flow conditions measured and represented as a 12 month moving average; (4)
"Max" means the maximum not to be exceeded at any time; (5) "ln H" means the natural logarithm of total hardness
expressed as milligrams/L of CaCO3. For metals criteria involving equations with hardness, the hardness shall be set
at 25 mg/L if actual hardness is <25 mg/L and set at 400 mg/L if actual hardness is >400 mg/L; (6) Criteria are
protective of human health not of aquatic life.
PARAMETER
UNITS
*PP
**C
Class I:
Potable Water
Supply
Class II: Recreation, Propagation and
Maintenance of a Healthy, Well-Balanced
Population of Fish and Wildlife
SUBSUBSUBCLASS
CLASS
CLASS
2-A
2-C
2-B
Class III:
Agricultural
Purposes
See Section
12.3 (a) & (b)
of this Part.
atmospheric
and hydrostatic
pressures.
55.
Transparency
Depth of the
compensation
point for
photosynthetic
activity
N
N
Shall not be reduced
by more than 10% as
compared to natural
background value.
Shall not be reduced by
more than 10% as compared
to natural background value.
56. Trichloroethylene
(Trichloroethane)
µg/L
Y
N
2.5 annual average
30 annual avg. 30 annual
avg.
57. Turbidity
Nephelometric
Turbidity Units
(NTU)
N
N
29 above natural
background
conditions
29 above
natural
background
conditions
29 above
natural
background
conditions
29 above
natural
background
conditions
Notes: (1) "*PP" means priority pollutant; (2) "**C" means Carcinogen; (3) "Annual avg" means the maximum
concentration at average annual flow conditions measured and represented as a 12 month moving average; (4)
"Max" means the maximum not to be exceeded at any time; (5) "ln H" means the natural logarithm of total hardness
expressed as milligrams/L of CaCO3. For metals criteria involving equations with hardness, the hardness shall be set
at 25 mg/L if actual hardness is <25 mg/L and set at 400 mg/L if actual hardness is >400 mg/L; (6) Criteria are
protective of human health not of aquatic life.
PARAMETER
58. Zinc
See Note (5)
UNITS
µg/L
*PP
Y
**C
N
Class I:
Potable Water
Supply
Zn exp(0.8473[lnH]
+0.884).
Class II: Recreation, Propagation and
Maintenance of a Healthy, Well-Balanced
Population of Fish and Wildlife
SUBSUBSUBCLASS
CLASS
CLASS
2-A
2-C
2-B
Class III:
Agricultural
Purposes
Zn
exp(0.8473[ln
H] +0.884).
Zn
exp(0.8473
[lnH] +
0.884).
See Section
12.3 (a) & (b)
of this Part.
Zn
exp(0.8473[
lnH]
+0.884).
Notes: (1) "*PP" means priority pollutant; (2) "**C" means Carcinogen; (3) "Annual avg" means the maximum
concentration at average annual flow conditions measured and represented as a 12 month moving average; (4)
"Max" means the maximum not to be exceeded at any time; (5) "ln H" means the natural logarithm of total hardness
expressed as milligrams/L of CaCO3. For metals criteria involving equations with hardness, the hardness shall be set
at 25 mg/L if actual hardness is <25 mg/L and set at 400 mg/L if actual hardness is >400 mg/L; (6) Criteria are
protective of human health not of aquatic life.
SWC Rules, Chapter B
As Approved March 13, 1998
Section 12.4 Review and Revision of Standards
The Department shall carry out a continuing planning process for water quality
management, in accordance with the Tribal Water Quality Code, and shall make
recommendations to the Commission for appropriate revisions to its rules. At least once
every three years the Commission shall consider adopting revisions to its water quality
standards and other provisions of its rules, following the procedural requirements set out
in the Tribal Water Quality Code. All officially adopted revisions to tribal water quality
standards shall be submitted to EPA for review and approval as required under 40 CFR
Sections 131.20 and 131.21. Any person who is interested in receiving notices related to
the review and revision of the Commission's rules should inform the Director of his or her
interest (providing name and address), and, by so doing, they will be included in the
"interested persons" list maintained by the Department.
Section 12.5 Antidegradation Policy
The Commission and the Department will carry out their responsibilities in
accordance with the antidegradation policy set forth in section 131.12 of EPA's
regulations. The Commission and the Department shall ensure that existing instream
water uses and the level of water quality necessary to protect the existing uses shall be
maintained and protected. Where high quality waters constitute an outstanding National
resource, such as waters of exceptional environmental, cultural or recreational
significance, that water quality shall be maintained and protected. Where the quality of
waters is better than necessary to support the propagation of fish, shellfish and wildlife
and recreation in and on the water, that quality shall be maintained and protected unless
the Commission and the Department finds, after full satisfaction of the intergovernmental
coordination and public participation provisions of the Department's continuing planning
process, that allowing lower water quality is necessary to accommodate important
economic or social development in the area in which the waters are located. In allowing
such degradation or lower water quality, the Commission and the Department shall
assure adequate water quality to protect existing uses fully.
Section 12.6 Methods and Procedures
- Part 12 - Page 9 -
SWC Rules, Chapter B
As Approved March 13, 1998
(a)
Sample collections and preservation used to determine water quality and to
maintain the standards set forth in the Water Quality Standards shall be performed in
accordance with procedures prescribed by the latest EPA authoritative analytical
reference, including but not limited to the latest editions of any of the following authorities:
(1) American Public Health Association,10 Standard Methods for the Examination of
Water and Wastewater; (2) "Methods for Chemical Analysis of Water and Wastes"; or (3)
"EPA Guidelines Establishing Test Procedures for the Analysis of Pollutants."
(b)
Sampling Procedures:
1.
Streams; Stream monitoring stations below waste discharges shall
be located a sufficient distance downstream to ensure adequate vertical
and lateral mixing.
2.
Reservoirs and impoundments: Sampling stations in reservoirs shall
be located at least 250 feet from a waste discharge, and otherwise, where
the attainment of a water quality standard is to be assessed. Water quality
measurements shall be taken at intervals in the water at a sampling station.
For toxic substances and nutrients, the entire water column shall be
monitored. For dissolved oxygen in stratified lakes, measurements shall be
made in the epilimnion. In nonstratified lakes, measurements will be made
at intervals throughout the entire water column.
(c)
All methods of analysis used in measuring the water quality of surface water
for purposes of determining compliance with these standards shall be in accordance with
procedures prescribed in the current Title 40 Code of Federal Regulations Part 136.
(d)
Bacteriological Surveys: The monthly geometric mean is used in
assessing attainment of standards when a minimum of five samples is collected in a 30day period. When less than 5 samples are collected in a 30-day period, no single sample
shall exceed the applicable upper limit for bacterial density set forth in Table 12.
- Part 12 - Page 10 -
SWC Rules, Chapter B
As Approved March 13, 1998
Section 12.7 Mixing Zone Policy
(a)
Mixing zones permissible. A permit issued by the EPA pursuant to
section 402 of the Clean Water Act for a point source discharge into Reservation surface
waters may include mixing zones, provided that any such mixing zone is consistent with
the policy stated in this section.
(b)
General policy. This policy establishes how mixing and dilution of point
source discharges with receiving waters will be addressed in developing chemical-specific
and whole effluent toxicity discharge limitations. Depending upon site-specific mixing
patterns and environmental concerns, some pollutants/criteria may be allowed to be
exceeded in a mixing zone while others may not. In all cases, mixing zone and dilution
allowances shall be limited as necessary to protect the integrity of the receiving water
ecosystem and designated waterbody uses. This policy shall be implemented consistent
with guidance issued by the EPA.
(c)
Mixing zones. Where dilution is available at critical conditions and the
discharge does not mix at a near instantaneous and complete rate, an appropriate mixing
zone may be designated if:
(1)
(2)
(3)
(4)
(5)
meeting water quality standards at the end-of-the-pipe is not
practicable;
allowing a mixing zone will not pose unacceptable risks to
designated or existing uses;
narrative criteria will be achieved within the mixing zone;
the size of mixing zones for streams, rivers and canals does not
exceed one-half the cross-sectional area or a length 10 times the
stream width at critical low flow, whichever is more limiting; and
the size of mixing zones for lakes does not exceed 5% of lake
surface area or 200 feet in radius, whichever is more limiting.
(d)
Dilution allowances. Where the discharge is to a river, stream or canal,
dilution is available at critical conditions, and available information is sufficient to
- Part 12 - Page 11 -
SWC Rules, Chapter B
As Approved March 13, 1998
reasonably conclude that the discharge exhibits near instantaneous and complete mixing,
an appropriate dilution allowance may be provided for purposes of establishing discharge
limitations. As a maximum, the following low flows may be used:
Stream Flows
Aquatic life
chronic
acute
Human health
carcinogens
non-carcinogens
4-day, 3-year flow (biologically based)
1-day, 3-year flow (biologically based)
harmonic mean flow
4-day, 3-year flow (biologically based)
or 1-day, 3-year flow (biologically based)
- Part 12 - Page 12 -
SWC Rules, Chapter B
As Approved March 13, 1998
aquatic life,
propagation
and maintenance
12 month moving average
Effluent Flows
Aquatic life, chronic Mean daily flow
Aquatic life, acute Maximum daily flow
Human Health (all) Mean daily flow
(e)
Prohibition. Where dilution flow is not available at critical conditions, the
discharge limits will be based on achieving water quality criteria at the end-of-the-pipe.
(f)
Commission veto. If the Commission objects in writing to the inclusion of
a mixing zone in any permit issued by the EPA for a point source discharge to
Reservation surface waters, the permit shall not include a mixing zone.
Section 12.8 Variance Policy
(a)
General Policy. In an appropriate case the Commission is authorized to
grant a variance for a particular discharger. Granting a variance may be appropriate in
any case in which one or more of the grounds specified in paragraph (d) below applies
and the Commission determines that the water quality standard for the body of water
ultimately can be attained. The procedure for granting a variance is essentially the same
process as for adopting or revising water quality standards. If the Commission decides to
grant a variance in a particular case, the terms of the variance will be specified as an
appendix to this section of the Commission's Rules.
(b)
Effect of a Variance; Expiration. The effect of a variance is to make it
legally permissible for that discharger to fail to comply with otherwise applicable water
quality criteria for one or more pollutant constituents. The discharger who is granted a
variance for one or more pollutant constituents is required to comply with all applicable
water quality criteria for all pollutant constituents not expressly included in the variance. A
variance is limited to a particular discharger; all other dischargers are subject to all
- Part 12 - Page 13 -
SWC Rules, Chapter B
As Approved March 13, 1998
applicable water quality criteria. In any case in which the Commission decides to grant a
variance, the Commission will specify a date on which the variance will expire, which may
be set to coincide with the next scheduled triennial review of the Commission's Water
Quality Standards Rules. The time period for a variance shall not exceed three (3) years,
although a variance may be rejustified upon expiration.
(c)
Procedure. A petition or application for a variance shall be in accordance
with these rules. The Petitioner or Applicant shall address the factors listed in paragraphs
(1) through (7) below in a request to the Commission, which shall review the petition
within a reasonable period of time to determine if it is complete. If the Commission
determines the petition or application to be incomplete, the Petitioner shall be afforded an
opportunity to supply additional information before the Commission evaluates the merits
of the request. The following must be included within the request:
(1)
The criterion or criteria from which a variance is sought.
(2)
The facts which show that a variance should be granted because of
one of the reasons specified in Section 12.8 (d), below.
(3)
The period of time for which the variance is sought, including the
reasons and facts in support of the time period.
(4)
The requirements which the Petitioner or Applicant can meet,
including the date or time when the requirements will be met.
(5)
The steps or measures the Petitioner or Applicant is taking to meet
the requirements from which the variance is sought.
(6)
The social, economic and environmental impacts on the Applicant
and residents of the area if the variance is granted.
(7)
The social, economic and environmental impacts on the Applicant
and residents of the area if the variance is denied.
- Part 12 - Page 14 -
SWC Rules, Chapter B
As Approved March 13, 1998
The Commission shall publish Notice of Intent in the Seminole Tribune or other
news media as the Tribal Chairman may direct and posting in accordance with Paragraph
3.5.5.1 of Subtitle A. In addition, Notice of Intent shall be provided to all individuals listed
on the "Interested Persons" list as described in Section 12.3.2 of the Tribal Water Code.
The Commission shall not grant a variance or petition for variance until a minimum of
thirty (30) days following the publication of notice to provide an opportunity for public
comment. A Public Hearing need not be held unless specifically requested during the
public comment period. With the exception of the Public Hearing requirement (if not
requested) the same procedures set forth in Section 12.3.2 of the Tribal Water Code for
the development of rules shall be followed in granting a variance, including adoption by
the Tribal Council and EPA review and approval.
(d)
Grounds for Granting a Variance. The Commission may grant a variance
if one or more of the following grounds exists:
(1)
Naturally occurring pollutant concentrations prevent the attainment of
one or more water quality criterion;
(2)
Natural, ephemeral, intermittent or low flow conditions or water levels
prevent the attainment of one or more water quality criterion, unless
these conditions may be compensated for by the discharge of
sufficient volume of the effluent discharges to enable the criterion (or
criteria) to be met, without violating tribal water conservation
requirements;
(3)
Human caused conditions or sources of pollution prevent the
attainment of one or more criterion and such conditions cannot be
remedied or would cause more environmental damage to correct
than to leave in place;
(4)
Dams, diversions or other types of hydrologic modifications preclude
the attainment of one or more criterion, and it is not feasible to
- Part 12 - Page 15 -
SWC Rules, Chapter B
As Approved March 13, 1998
restore the waterbody to its original condition or to operate such
modification in a way that would result in the attainment of the
criterion (or criteria);
(5)
Physical conditions related to the natural features of the waterbody,
such as the lack of a proper substrate, cover, flow, depth, pools, and
the like, unrelated to water quality, preclude the attainment of aquatic
life protection criteria; or
(6) Controls more stringent than those required by sections 301(b) and 306
of the Act would result in substantial and widespread economic and
social impact.
- Part 12 - Page 16 -
This is a copy of a public record, reproduced as it was published. It is not legal advice, and it may not be the version a court would rely on. Check the official source before you cite it.