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(continued)
(B) Stock watering.
(C) Fish and shellfish: Salmonid migration, rearing, spawning, and harvesting; other fish migration, rearing, spawning, and harvesting.
(D) Wildlife habitat.
(E) Ceremonial and religious water use.
(F) Recreation (primary contact recreation, sport fishing, boating and aesthetic enjoyment).
(G) Commerce and navigation.
(ii) Water quality criteria. (A) Bacteriological Criteria. The geometric mean of the enterococci bacteria densities in samples taken over a 30 day period shall not exceed 8 per 100 milliliters, nor shall any single sample exceed an enterococci density of 35 per 100 milliliters. These limits are calculated as the geometric mean of the collected samples approximately equally spaced over a thirty day period.
(B) Dissolved oxygen—The dissolved oxygen shall exceed 9.5 mg/l.
(C) Total dissolved gas—concentrations shall not exceed 110 percent of the saturation value for gases at the existing atmospheric and hydrostatic pressures at any point of sample collection.
(D) Temperature—shall not exceed 16.0 degrees C due to human activities. Temperature increases shall not, at any time, exceed t=23/(T+5).
(1) When natural conditions exceed 16.0 degrees C, no temperature increase will be allowed which will raise the receiving water by greater than 0.3 degrees C.
(2) For purposes hereof, “t” represents the permissive temperature change across the dilution zone; and “T” represents the highest existing temperature in this water classification outside of any dilution zone.
(3) Provided that temperature increase resulting from nonpoint source activities shall not exceed 2.8 degrees C, and the maximum water temperature shall not exceed 10.3 degrees C.
(E) pH shall be within the range of 6.5 to 8.5 with a human-caused variation of less than 0.2 units.
(F) Turbidity shall not exceed 5 NTU over background turbidity when the background turbidity is 50 NTU or less, or have more than a 10 percent increase in turbidity when the background turbidity is more than 50 NTU.
(G) Toxic, radioactive, nonconventional, or deleterious material concentrations shall be less than those of public health significance, or which may cause acute or chronic toxic conditions to the aquatic biota, or which may adversely affect designated water uses.
(2) Class II (Excellent)—(i) Designated uses. The designated uses include but are not limited to, the following:
(A) Water supply (domestic, industrial, agricultural).
(B) Stock watering.
(C) Fish and shellfish: Salmonid migration, rearing, spawning, and harvesting; other fish migration, rearing, spawning, and harvesting; crayfish rearing, spawning, and harvesting.
(D) Wildlife habitat.
(E) Ceremonial and religious water use.
(F) Recreation (primary contact recreation, sport fishing, boating and aesthetic enjoyment).
(G) Commerce and navigation.
(ii) Water quality criteria. (A) Bacteriological Criteria—The geometric mean of the enterococci bacteria densities in samples taken over a 30 day period shall not exceed 16/100 ml, nor shall any single sample exceed an enterococci density of 75 per 100 milliliters. These limits are calculated as the geometric mean of the collected samples approximately equally spaced over a thirty day period.
(B) Dissolved oxygen—The dissolved oxygen shall exceed 8.0 mg/l.
(C) Total dissolved gas—concentrations shall not exceed 110 percent of the saturation value for gases at the existing atmospheric and hydrostatic pressures at any point of sample collection.
(D) Temperature-shall not exceed 18.0 degrees C due to human activities. Temperature increases shall not, at any time, exceed t=28/(T+7).
(1) When natural conditions exceed 18 degrees C no temperature increase will be allowed which will raise the receiving water temperature by greater than 0.3 degrees C.
(2) For purposes hereof, “t” represents the permissive temperature change across the dilution zone; and “T” represents the highest existing temperature in this water classification outside of any dilution zone.
(3) Provided that temperature increase resulting from non-point source activities shall not exceed 2.8 degrees C, and the maximum water temperature shall not exceed 18.3 degrees C.
(E) pH shall be within the range of 6.5 to 8.5 with a human-caused variation of less than 0.5 units.
(F) Turbidity shall not exceed 5 NTU over background turbidity when the background turbidity is 50 NTU or less, or have more than a 10 percent increase in turbidity when the background turbidity is more than 50 NTU.
(G) Toxic, radioactive, nonconventional, or deleterious material concentrations shall be less than those of public health significance, or which may cause acute or chronic toxic conditions to the aquatic biota, or which may adversely affect designated water uses.
(3) Class III (Good)—(i) Designated uses. The designated uses include but are not limited to, the following:
(A) Water supply (industrial, agricultural).
(B) Stock watering.
(C) Fish and shellfish: Salmonid migration, rearing, spawning, and harvesting; other fish migration, rearing, spawning, and harvesting; crayfish rearing, spawning, and harvesting.
(D) Wildlife habitat.
(E) Recreation (secondary contact recreation, sport fishing, boating and aesthetic enjoyment).
(F) Commerce and navigation.
(ii) Water quality criteria. (A) Bacteriological Criteria—The geometric mean of the enterococci bacteria densities in samples taken over a 30 day period shall not exceed 33/100 ml, nor shall any single sample exceed an enterococci density of 150 per 100 milliliters. These limits are calculated as the geometric mean of the collected samples approximately equally spaced over a thirty day period.
(B) Dissolved oxygen.
------------------------------------------------------------------------
Early
life Other
stages 1, life
2 stages
------------------------------------------------------------------------
7 day mean.......................................... 9.5 (6.5) \3\ NA
1 day minimum \4\................................... 8.0 (5.0) 6.5
------------------------------------------------------------------------
\1\ These are water column concentrations recommended to achieve the
required intergravel dissolved oxygen concentrations shown in
parentheses. The 3 mg/L differential is discussed in the dissolved
oxygen criteria document (EPA 440/5-86-003, April 1986). For species
that have early life stages exposed directly to the water column, the
figures in parentheses apply.
\2\ Includes all embryonic and larval stages and all juvenile forms to
30-days following hatching.
\3\ NA (not applicable)
\4\ All minima should be considered as instantaneous concentrations to
be achieved at all times.
(C) Total dissolved gas concentrations shall not exceed 110 percent of the saturation value for gases at the existing atmospheric and hydrostatic pressures at any point of sample collection.
(D) Temperature shall not exceed 21.0 degrees C due to human activities. Temperature increases shall not, at any time, exceed t=34/(T+9).
(1) When natural conditions exceed 21.0 degrees C no temperature increase will be allowed which will raise the receiving water temperature by greater than 0.3 degrees C.
(2) For purposes hereof, “t” represents the permissive temperature change across the dilution zone; and “T” represents the highest existing temperature in this water classification outside of any dilution zone.
(3) Provided that temperature increase resulting from nonpoint source activities shall not exceed 2.8 degrees C, and the maximum water temperature shall not exceed 21.3 degrees C.
(E) pH shall be within the range of 6.5 to 8.5 with a human-caused variation of less than 0.5 units.
(F) Turbidity shall not exceed 10 NTU over background turbidity when the background turbidity is 50 NTU or less, or have more than a 20 percent increase in turbidity when the background turbidity is more than 50 NTU.
(G) Toxic, radioactive, nonconventional, or deleterious material concentrations shall be less than those of public health significance, or which may cause acute or chronic toxic conditions to the aquatic biota, or which may adversely affect designated water uses.
(4) Class IV (Fair)—(i) Designated uses. The designated uses include but are not limited to, the following:
(A) Water supply (industrial).
(B) Stock watering.
(C) Fish (salmonid and other fish migration).
(D) Recreation (secondary contact recreation, sport fishing, boating and aesthetic enjoyment).
(E) Commerce and navigation.
(ii) Water quality criteria. (A) Dissolved oxygen.
------------------------------------------------------------------------
During
periods of During
salmonid all other
and other time
fish periods
migration
------------------------------------------------------------------------
30 day mean..................................... 6.5 5.5
7 day mean...................................... \1\ NA \1\ NA
7 day mean minimum.............................. 5.0 4.0
1 day minimum \2\............................... 4.0 3.0
------------------------------------------------------------------------
\1\ NA (not applicable).
\2\ All minima should be considered as instantaneous concentrations to
be achieved at all times.
(B) Total dissolved gas—concentrations shall not exceed 110 percent of the saturation value for gases at the existing atmospheric and hydrostatic pressures at any point of sample collection.
(C) Temperature shall not exceed 22.0 degrees C due to human activities. Temperature increases shall not, at any time, exceed t=20/(T+2).
(1) When natural conditions exceed 22.0 degrees C, no temperature increase will be allowed which will raise the receiving water temperature by greater than 0.3 degrees C.
(2) For purposes hereof, “t” represents the permissive temperature change across the dilution zone; and “T” represents the highest existing temperature in this water classification outside of any dilution zone.
(D) pH shall be within the range of 6.5 to 9.0 with a human-caused variation of less than 0.5 units.
(E) Turbidity shall not exceed 10 NTU over background turbidity when the background turbidity is 50 NTU or less, or have more than a 20 percent increase in turbidity when the background turbidity is more than 50 NTU.
(F) Toxic, radioactive, nonconventional, or deleterious material concentrations shall be less than those of public health significance, or which may cause acute or chronic toxic conditions to the aquatic biota, or which may adversely affect designated water uses.
(5) Lake Class—(i) Designated uses. The designated uses include but are not limited to, the following:
(A) Water supply (domestic, industrial, agricultural).
(B) Stock watering.
(C) Fish and shellfish: Salmonid migration, rearing, spawning, and harvesting; other fish migration, rearing, spawning, and harvesting; crayfish rearing, spawning, and harvesting.
(D) Wildlife habitat.
(E) Ceremonial and religious water use.
(F) Recreation (primary contact recreation, sport fishing, boating and aesthetic enjoyment).
(G) Commerce and navigation.
(ii) Water quality criteria. (A) Bacteriological Criteria. The geometric mean of the enterococci bacteria densities in samples taken over a 30 day period shall not exceed 33/100 ml, nor shall any single sample exceed an enterococci density of 150 per 100 milliliters. These limits are calculated as the geometric mean of the collected samples approximately equally spaced over a thirty day period.
(B) Dissolved oxygen—no measurable decrease from natural conditions.
(C) Total dissolved gas concentrations shall not exceed 110 percent of the saturation value for gases at the existing atmospheric and hydrostatic pressures at any point of sample collection.
(D) Temperature—no measurable change from natural conditions.
(E) pH—no measurable change from natural conditions.
(F) Turbidity shall not exceed 5 NTU over natural conditions.
(G) Toxic, radioactive, nonconventional, or deleterious material concentrations shall be less than those which may affect public health, the natural aquatic environment, or the desirability of the water for any use.
(6) Special Resource Water Class (SRW)—(i) General characteristics. These are fresh or saline waters which comprise a special and unique resource to the Reservation. Water quality of this class will be varied and unique as determined by the Regional Administrator in cooperation with the Tribes.
(ii) Designated uses. The designated uses include, but are not limited to, the following:
(A) Wildlife habitat.
(B) Natural foodchain maintenance.
(iii) Water quality criteria.
(A) Enterococci bacteria densities shall not exceed natural conditions.
(B) Dissolved oxygen—shall not show any measurable decrease from natural conditions.
(C) Total dissolved gas shall not vary from natural conditions.
(D) Temperature—shall not show any measurable change from natural conditions.
(E) pH shall not show any measurable change from natural conditions.
(F) Settleable solids shall not show any change from natural conditions.
(G) Turbidity shall not exceed 5 NTU over natural conditions.
(H) Toxic, radioactive, or deleterious material concentrations shall not exceed those found under natural conditions.
(g) General classifications. General classifications applying to various surface waterbodies not specifically classified under §131.35(h) are as follows:
(1) All surface waters that are tributaries to Class I waters are classified Class I, unless otherwise classified.
(2) Except for those specifically classified otherwise, all lakes with existing average concentrations less than 2000 mg/L TDS and their feeder streams on the Colville Indian Reservation are classified as Lake Class and Class I, respectively.
(3) All lakes on the Colville Indian Reservation with existing average concentrations of TDS equal to or exceeding 2000 mg/L and their feeder streams are classified as Lake Class and Class I respectively unless specifically classified otherwise.
(4) All reservoirs with a mean detention time of greater than 15 days are classified Lake Class.
(5) All reservoirs with a mean detention time of 15 days or less are classified the same as the river section in which they are located.
(6) All reservoirs established on pre-existing lakes are classified as Lake Class.
(7) All wetlands are assigned to the Special Resource Water Class.
(8) All other waters not specifically assigned to a classification of the reservation are classified as Class II.
(h) Specific classifications. Specific classifications for surface waters of the Colville Indian Reservation are as follows:
(1) Streams:
Alice Creek Class III
Anderson Class III
Creek.
Armstrong Class III
Creek.
Barnaby Class II
Creek.
Bear Creek. Class III
Beaver Dam Class II
Creek.
Bridge Class II
Creek.
Brush Creek Class III
Buckhorn Class III
Creek.
Cache Creek Class III
Canteen Class I
Creek.
Capoose Class III
Creek.
Cobbs Creek Class III
Columbia
River from
Chief
Joseph Dam
to Wells
Dam.
Columbia
River from
northern
Reservatio
n boundary
to Grand
Coulee Dam
(Roosevelt
Lake).
Columbia
River from
Grand
Coulee Dam
to Chief
Joseph Dam.
Cook Creek. Class I
Cooper Class III
Creek.
Cornstalk Class III
Creek.
Cougar Class I
Creek.
Coyote Class II
Creek.
Deerhorn Class III
Creek.
Dick Creek. Class III
Dry Creek.. Class I
Empire Class III
Creek.
Faye Creek. Class I
Forty Mile Class III
Creek.
Gibson Class I
Creek.
Gold Creek. Class II
Granite Class II
Creek.
Grizzly Class III
Creek.
Haley Creek Class III
Hall Creek. Class II
Hall Creek, Class I
West Fork.
Iron Creek. Class III
Jack Creek. Class III
Jerred Class I
Creek.
Joe Moses Class III
Creek.
John Tom Class III
Creek.
Jones Creek Class I
Kartar Class III
Creek.
Kincaid Class III
Creek.
King Creek. Class III
Klondyke Class I
Creek.
Lime Creek. Class III
Little Jim Class III
Creek.
Little Class II
Nespelem.
Louie Creek Class III
Lynx Creek. Class II
Manila Class III
Creek.
McAllister Class III
Creek.
Meadow Class III
Creek.
Mill Creek. Class II
Mission Class III
Creek.
Nespelem Class II
River.
Nez Perce Class III
Creek.
Nine Mile Class II
Creek.
Nineteen Class III
Mile Creek.
No Name Class II
Creek.
North Class III
Nanamkin
Creek.
North Star Class III
Creek.
Okanogan Class II
River from
Reservatio
n north
boundary
to
Columbia
River.
Olds Creek. Class I
Omak Creek. Class II
Onion Creek Class II
Parmenter Class III
Creek.
Peel Creek. Class III
Peter Dan Class III
Creek.
Rock Creek. Class I
San Poil Class I
River.
Sanpoil, Class II
River West
Fork.
Seventeen Class III
Mile Creek.
Silver Class III
Creek.
Sitdown Class III
Creek.
Six Mile Class III
Creek.
South Class III
Nanamkin
Creek.
Spring Class III
Creek.
Stapaloop Class III
Creek.
Stepstone Class III
Creek.
Stranger Class II
Creek.
Strawberry Class III
Creek.
Swimptkin Class III
Creek.
Three Forks Class I
Creek.
Three Mile Class III
Creek.
Thirteen Class II
Mile Creek.
Thirty Mile Class II
Creek.
Trail Creek Class III
Twentyfive Class III
Mile Creek.
Twentyone Class III
Mile Creek.
Twentythree Class III
Mile Creek.
Wannacot Class III
Creek.
Wells Creek Class I
Whitelaw Class III
Creek.
Wilmont Class II
Creek.
(2) Lakes:
Apex Lake.. LC
Big Goose LC
Lake.
Bourgeau LC
Lake.
Buffalo LC
Lake.
Cody Lake.. LC
Crawfish LC
Lakes.
Camille LC
Lake.
Elbow Lake. LC
Fish Lake.. LC
Gold Lake.. LC
Great LC
Western
Lake.
Johnson LC
Lake.
LaFleur LC
Lake.
Little LC
Goose Lake.
Little Owhi LC
Lake.
McGinnis LC
Lake.
Nicholas LC
Lake.
Omak Lake.. SRW
Owhi Lake.. SRW
Penley Lake SRW
Rebecca LC
Lake.
Round Lake. LC
Simpson LC
Lake.
Soap Lake.. LC
Sugar Lake. LC
Summit Lake LC
Twin Lakes. SRW
[54 FR 28625, July 6, 1989]
§ 131.36 Toxics criteria for those states not complying with Clean Water Act section 303(c)(2)(B).
top
(a) Scope. This section is not a general promulgation of the section 304(a) criteria for priority toxic pollutants but is restricted to specific pollutants in specific States.
(b)(1) EPA's Section 304(a) criteria for Priority Toxic Pollutants.
--------------------------------------------------------------------------------------------------------------------------------------------------------
A B Freshwater C Saltwater D Human Health (10-6 risk for
----------------------------------------------------------------------------------------------------------------------- carcinogens) For consumption of:
Criterion Criterion ---------------------------------
Criterion Continuous Criterion Continuous Water &
(#) Compound CAS Number Maximum Conc. d Conc. d Maximum Conc. d Conc. d Organisms Organisms Only
(µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L)
............... B1 B2 C1 C2 D1 D2
--------------------------------------------------------------------------------------------------------------------------------------------------------
1 Antimony...................... 7440360 ............... ............... ............... ............... 14 a 4300 a
2 Arsenic....................... 7440382 360 m 190 m 69 m 36 m 0.018 abc 0.14 abc
3 Beryllium..................... 7440417 ............... ............... ............... ............... n n
4 Cadmium....................... 7440439 3.7 e 1.0 e 42 m 9.3 m n n
5a Chromium (III)............... 16065831 550 e 180 e ............... ............... n n
b Chromium (VI)................. 18540299 15 m 10 m 1100 m 50 m n n
6 Copper........................ 7440508 17 e 11 e 2.4 m 2.4 m
7 Lead.......................... 7439921 65 e 2.5 e 210 m 8.1 m n n
8 Mercury....................... 7439976 2.1 m 0.012 ip 1.8 m 0.025 ip 0.14 0.15
9 Nickel........................ 7440020 1400 e 160 e 74 m 8.2 m 610 a 4600 a
10 Selenium..................... 7782492 20 p 5 p 290 m 71 m n n
11 Silver....................... 7440224 3.4 e ............... 1.9 m
12 Thallium..................... 7440280 ............... ............... ............... ............... 1.7 a 6.3 a
13 Zinc......................... 7440666 110 e 100 e 90 m 81 m
14 Cyanide...................... 57125 22 5.2 1 1 700 a 220000 aj
15 Asbestos..................... 1332214 ............... ............... ............... ............... 7,000,000
fibers/L k
16 2,3,7,8-TCDD (Dioxin)........ 1746016 ............... ............... ............... ............... 0.000000013 c 0.000000014 c
17 Acrolein..................... 107028 ............... ............... ............... ............... 320 780
18 Acrylonitrile................ 107131 ............... ............... ............... ............... 0.059 ac 0.66 ac
19 Benzene...................... 71432 ............... ............... ............... ............... 1.2 ac 71 ac
20 Bromoform.................... 75252 ............... ............... ............... ............... 4.3 ac 360 ac
21 Carbon Tetrachloride......... 56235 ............... ............... ............... ............... 0.25 ac 4.4 ac
22 Chlorobenzene................ 108907 ............... ............... ............... ............... 680 a 21000 aj
23 Chlorodibromomethane......... 124481 ............... ............... ............... ............... 0.41 ac 34 ac
24 Chloroethane................. 75003
25 2-Chloroethylvinyl Ether..... 110758
26 Chloroform................... 67663 ............... ............... ............... ............... 5.7 ac 470 ac
27 Dichlorobromomethane......... 75274 ............... ............... ............... ............... 0.27 ac 22 ac
28 1,1-Dichloroethane........... 75343
29 1,2-Dichloroethane........... 107062 ............... ............... ............... ............... 0.38 ac 99 ac
30 1,1-Dichloroethylene......... 75354 ............... ............... ............... ............... 0.057 ac 3.2 ac
31 1,2-Dichloropropane.......... 78875
32 1,3-Dichloropropylene........ 542756 ............... ............... ............... ............... 10 a 1700 a
33 Ethylbenzene................. 100414 ............... ............... ............... ............... 3100 a 29000 a
34 Methyl Bromide............... 74839 ............... ............... ............... ............... 48 a 4000 a
35 Methyl Chloride.............. 74873 ............... ............... ............... ............... n n
36 Methylene Chloride........... 75092 ............... ............... ............... ............... 4.7 ac 1600 ac
37 1,1,2,2-Tetrachloroethane.... 79345 ............... ............... ............... ............... 0.17 ac 11 ac
38 Tetrachloroethylene.......... 127184 ............... ............... ............... ............... 0.8 c 8.85 c
39 Toluene...................... 108883 ............... ............... ............... ............... 6800 a 200000 a
40 1,2-Trans-Dichloroethylene... 156605
41 1,1,1-Trichloroethane........ 71556 ............... ............... ............... ............... n n
42 1,1,2-Trichloroethane........ 79005 ............... ............... ............... ............... 0.60 ac 42 ac
43 Trichloroethylene............ 79016 ............... ............... ............... ............... 2.7 c 81 c
44 Vinyl Chloride............... 75014 ............... ............... ............... ............... 2 c 525 c
45 2-Chlorophenol............... 95578
46 2,4-Dichlorophenol........... 120832 ............... ............... ............... ............... 93 a 790 aj
47 2,4-Dimethylphenol........... 105679
48 2-Methyl-4,6-Dinitrophenol... 534521 ............... ............... ............... ............... 13.4 765
49 2,4-Dinitrophenol............ 51285 ............... ............... ............... ............... 70 a 14000 a
50 2-Nitrophenol................ 88755
51 4-Nitrophenol................ 100027
52 3-Methyl-4-Chlorophenol...... 59507
53 Pentachlorophenol............ 87865 20 f 13 f 13 7.9 0.28 ac 8.2 acj
54 Phenol....................... 108952 ............... ............... ............... ............... 21000 a 4600000 aj
55 2,4,6-Trichlorophenol........ 88062 ............... ............... ............... ............... 2.1 ac 6.5 ac
56 Acenaphthene................. 83329
57 Acenaphthylene............... 208968
58 Anthracene................... 120127 ............... ............... ............... ............... 9600 a 110000 a
59 Benzidine.................... 92875 ............... ............... ............... ............... 0.00012 ac 0.00054 ac
60 Benzo(a)Anthracene........... 56553 ............... ............... ............... ............... 0.0028 c 0.031 c
61 Benzo(a)Pyrene............... 50328 ............... ............... ............... ............... 0.0028 c 0.031 c
62 Benzo(b)Fluoranthene......... 205992 ............... ............... ............... ............... 0.0028 c 0.031 c
63 Benzo(ghi)Perylene........... 191242
64 Benzo(k)Fluoranthene......... 207089 ............... ............... ............... ............... 0.0028 c 0.031 c
65 Bis(2-Chloroethoxy)Methane... 111911
66 Bis(2-Chloroethyl)Ether...... 111444 ............... ............... ............... ............... 0.031 ac 1.4 ac
67 Bis(2-Chloroisopropyl)Ether.. 108601 ............... ............... ............... ............... 1400 a 170000 a
68 Bis(2-Ethylhexyl)Phthalate... 117817 ............... ............... ............... ............... 1.8 ac 5.9 ac
69 4-Bromophenyl Phenyl Ether... 101553
70 Butylbenzyl Phthalate........ 85687
71 2-Chloronaphthalene.......... 91587
72 4-Chlorophenyl Phenyl Ether.. 7005723
73 Chrysene..................... 218019 ............... ............... ............... ............... 0.0028 c 0.031 c
74 Dibenzo(ah)Anthracene........ 53703 ............... ............... ............... ............... 0.0028 c 0.031 c
75 1,2-Dichlorobenzene.......... 95501 ............... ............... ............... ............... 2700 a 17000 a
76 1,3-Dichlorobenzene.......... 541731 ............... ............... ............... ............... 400 2600
77 1,4-Dichlorobenzene.......... 106467 ............... ............... ............... ............... 400 2600
78 3,3[prime]-Dichlorobenzidine. 91941 ............... ............... ............... ............... 0.04 ac 0.077 ac
79 Diethyl Phthalate............ 84662 ............... ............... ............... ............... 23000 a 120000 a
80 Dimethyl Phthalate........... 131113 ............... ............... ............... ............... 313000 2900000
81 Di-n-Butyl Phthalate......... 84742 ............... ............... ............... ............... 2700 a 12000 a
82 2,4-Dinitrotoluene........... 121142 ............... ............... ............... ............... 0.11 c 9.1 c
83 2,6-Dinitrotoluene........... 606202
84 Di-n-Octyl Phthalate......... 117840
85 1,2-Diphenylhydrazine........ 122667 ............... ............... ............... ............... 0.040 ac 0.54 ac
86 Fluoranthene................. 206440 ............... ............... ............... ............... 300 a 370 a
87 Fluorene..................... 86737 ............... ............... ............... ............... 1300 a 14000 a
88 Hexachlorobenzene............ 118741 ............... ............... ............... ............... 0.00075 ac 0.00077 ac
89 Hexachlorobutadiene.......... 87683 ............... ............... ............... ............... 0.44 ac 50 ac
90 Hexachlorocyclopentadiene.... 77474 ............... ............... ............... ............... 240 a 17000 aj
91 Hexachloroethane............. 67721 ............... ............... ............... ............... 1.9 ac 8.9 ac
92 Indeno(1,2,3-cd)Pyrene....... 193395 ............... ............... ............... ............... 0.0028 c 0.031 c
93 Isophorone................... 78591 ............... ............... ............... ............... 8.4 ac 600 ac
94 Naphthalene.................. 91203
95 Nitrobenzene................. 98953 ............... ............... ............... ............... 17 a 1900 aj
96 N-Nitrosodimethylamine....... 62759 ............... ............... ............... ............... 0.00069 ac 8.1 ac
97 N-Nitrosodi-n-Propylamine.... 621647
98 N-Nitrosodiphenylamine....... 86306 ............... ............... ............... ............... 5.0 ac 16 ac
99 Phenanthrene................. 85018
100 Pyrene....................... 129000 ............... ............... ............... ............... 960 a 11000 a
101 1,2,4-Trichlorobenzene....... 120821
102 Aldrin....................... 309002 3 g ............... 1.3 g ............... 0.00013 ac 0.00014 ac
103 alpha-BHC.................... 319846 ............... ............... ............... ............... 0.0039 ac 0.013 ac
104 beta-BHC..................... 319857 ............... ............... ............... ............... 0.014 ac 0.046 ac
105 gamma-BHC.................... 58899 2 g 0.08 g 0.16 g ............... 0.019 c 0.063 c
106 delta-BHC.................... 319868
107 Chlordane.................... 57749 2.4 g 0.0043 g 0.09 g 0.004 g 0.00057 ac 0.00059 ac
108 4,4[prime]-DDT............... 50293 1.1 g 0.001 g 0.13 g 0.001 g 0.00059 ac 0.00059 ac
109 4,4[prime]-DDE............... 72559 ............... ............... ............... ............... 0.00059 ac 0.00059 ac
110 4,4[prime]-DDD............... 72548 ............... ............... ............... ............... 0.00083 ac 0.00084 ac
111 Dieldrin..................... 60571 2.5 g 0.0019 g 0.71 g 0.0019 g 0.00014 ac 0.00014 ac
112 alpha-Endosulfan............. 959988 0.22 g 0.056 g 0.034 g 0.0087 g 0.93 a 2.0 a
113 beta-Endosulfan.............. 33213659 0.22 g 0.056 g 0.034 g 0.0087 g 0.93 a 2.0 a
114 Endosulfan Sulfate........... 1031078 ............... ............... ............... ............... 0.93 a 2.0 a
115 Endrin....................... 72208 0.18 g 0.0023 g 0.037 g 0.0023 g 0.76 a 0.81 aj
116 Endrin Aldehyde.............. 7421934 ............... ............... ............... ............... 0.76 a 0.81 aj
117 Heptachlor................... 76448 0.52 g 0.0038 g 0.053 g 0.0036 g 0.00021 ac 0.00021 ac
118 Heptachlor Epoxide........... 1024573 0.52 g 0.0038 g 0.053 g 0.0036 g 0.00010 ac 0.00011 ac
119 PCB-1242..................... 53469219 ............... 0.014 g ............... 0.03 g
120 PCB-1254..................... 11097691 ............... 0.014 g ............... 0.03 g
121 PCB-1221..................... 11104282 ............... 0.014 g ............... 0.03 g
122 PCB-1232..................... 11141165 ............... 0.014 g ............... 0.03 g
123 PCB-1248..................... 12672296 ............... 0.014 g ............... 0.03 g
124 PCB-1260..................... 11096825 ............... 0.014 g ............... 0.03 g
125a PCB-1016.................... 12674112 ............... 0.014 g ............... 0.03 g
125b Polychlorinated biphenyls ............... ............... ............... ............... ............... 0.00017 q 0.00017 q
(PCBs)..........................
126 Toxaphene.................... 8001352 0.73 0.0002 0.21 0.0002 0.00073 ac 0.00075 ac
Total Number of Criteria (h) ............... 24 29 23 27 85 84
=...........................
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Footnotes
a. Criteria revised to reflect current agency q1* or RfD, as contained in the Integrated Risk Information System (IRIS). The fish tissue bioconcentration factor (BCF) from the 1980 criteria documents was retained in all cases.
b. The criteria refers to the inorganic form only.
c. Criteria in the matrix based on carcinogenicity (10-6 risk). For a risk level of 10-5, move the decimal point in the matrix value one place to the right.
d. Criteria Maximum Concentration (CMC) = the highest concentration of a pollutant to which aquatic life can be exposed for a short period of time (1-hour average) without deleterious effects. Criteria Continuous Concentration (CCC) = the highest concentration of a pollutant to which aquatic life can be exposed for an extended period of time (4 days) without deleterious effects. µg/L = micrograms per liter.
e. Freshwater aquatic life criteria for these metals are expressed as a function of total hardness (mg/L as CaCO3), the pollutant's water effect ratio (WER) as defined in §131.36(c) and multiplied by an appropriate dissolved conversion factor as defined in §131.36(b)(2). For comparative purposes, the values displayed in this matrix are shown as dissolved metal and correspond to a total hardness of 100 mg/L and a water effect ratio of 1.0.
f. Freshwater aquatic life criteria for pentachlorophenol are expressed as a function of pH, and are calculated as follows. Values displayed above in the matrix correspond to a pH of 7.8.
CMC = exp(1.005(pH)-4.830)
CCC = exp(1.005(pH)-5.290)
g. Aquatic life criteria for these compounds were issued in 1980 utilizing the 1980 Guidelines for criteria development. The acute values shown are final acute values (FAV) which by the 1980 Guidelines are instantaneous values as contrasted with a CMC which is a one-hour average.
h. These totals simply sum the criteria in each column. For aquatic life, there are 31 priority toxic pollutants with some type of freshwater or saltwater, acute or chronic criteria. For human health, there are 85 priority toxic pollutants with either “water + fish” or “fish only” criteria. Note that these totals count chromium as one pollutant even though EPA has developed criteria based on two valence states. In the matrix, EPA has assigned numbers 5a and 5b to the criteria for chromium to reflect the fact that the list of 126 priority toxic pollutants includes only a single listing for chromium.
i. If the CCC for total mercury exceeds 0.012 µg/l more than once in a 3-year period in the ambient water, the edible portion of aquatic species of concern must be analyzed to determine whether the concentration of methyl mercury exceeds the FDA action level (1.0 mg/kg). If the FDA action level is exceeded, the State must notify the appropriate EPA Regional Administrator, initiate a revision of its mercury criterion in its water quality standards so as to protect designated uses, and take other appropriate action such as issuance of a fish consumption advisory for the affected area.
j. No criteria for protection of human health from consumption of aquatic organisms (excluding water) was presented in the 1980 criteria document or in the 1986 Quality Criteria for Water. Nevertheless, sufficient information was presented in the 1980 document to allow a calculation of a criterion, even though the results of such a calculation were not shown in the document.
k. The criterion for asbestos is the MCL (56 FR 3526, January 30, 1991).
l. [Reserved: This letter not used as a footnote.]
m. Criteria for these metals are expressed as a function of the water effect ratio, WER, as defined in 40 CFR 131.36(c).
CMC = column B1 or C1 value × WER
CCC = column B2 or C2 value × WER
n. EPA is not promulgating human health criteria for this contaminant. However, permit authorities should address this contaminant in NPDES permit actions using the State's existing narrative criteria for toxics.
o. [Reserved: This letter not used as a footnote.]
p. Criterion expressed as total recoverable.
q. This criterion applies to total PCBs (e.g., the sum of all congener or isomer or homolog or Aroclor analyses).
General Notes
1. This chart lists all of EPA's priority toxic pollutants whether or not criteria recommendations are available. Blank spaces indicate the absence of criteria recommendations. Because of variations in chemical nomenclature systems, this listing of toxic pollutants does not duplicate the listing in Appendix A of 40 CFR Part 423. EPA has added the Chemical Abstracts Service (CAS) registry numbers, which provide a unique identification for each chemical.
2. The following chemicals have organoleptic based criteria recommendations that are not included on this chart (for reasons which are discussed in the preamble): copper, zinc, chlorobenzene, 2-chlorophenol, 2,4-dichlorophenol, acenaphthene, 2,4-dimethylphenol, 3-methyl-4-chlorophenol, hexachlorocyclopentadiene, pentachlorophenol, phenol.
3. For purposes of this rulemaking, freshwater criteria and saltwater criteria apply as specified in 40 CFR 131.36(c).
Note to paragraph (b)(1): On April 14, 1995, the Environmental Protection Agency issued a stay of certain criteria in paragraph (b)(1) of this section as follows: the criteria in columns B and C for arsenic, cadmium, chromium (VI), copper, lead, nickel, silver, and zinc; the criteria in B1 and C1 for mercury; the criteria in column B for chromium (III); and the criteria in column C for selenium. The stay remains in effect until further notice.
(2) Factors for Calculating Hardness-Dependent, Freshwater Metals Criteria
CMC=WER exp { mA[ln(hardness)]+bA} × Acute Conversion Factor
CCC=WER exp { mC[ln(hardness)]+bC} × Chronic Conversion Factor
Final CMC and CCC values should be rounded to two significant figures.
----------------------------------------------------------------------------------------------------------------
Freshwater conversion
factors
Metal mA bA mC bC -------------------------
Acute Chronic
----------------------------------------------------------------------------------------------------------------
Cadmium........................... 1.128 -3.828 0.7852 -3.490 a 0.944 a 0.909
Chromium (III).................... 0.8190 3.688 0.8190 1.561 0.316 0.860
Copper............................ 0.9422 -1.464 0.8545 -1.465 0.960 0.960
Lead.............................. 1.273 -1.460 1.273 -4.705 a 0.791 a 0.791
Nickel............................ 0.8460 3.3612 0.8460 1.1645 0.998 0.997
Silver............................ 1.72 -6.52 b N/A b N/A 0.85 b N/A
Zinc.............................. 0.8473 0.8604 0.8473 0.7614 0.978 0.986
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Note to table: The term ``exp'' represents the base e exponential function.
Footnotes to table:
a The freshwater conversion factors (CF) for cadmium and lead are hardness-dependent and can be calculated for
any hardness [see limitations in § 131.36(c)(4)] using the following equations:
Cadmium
Acute: CF=1.136672_[(ln hardness)(0.041838)]
Chronic: CF=1.101672_[(ln hardness)(0.041838)]
Lead (Acute and Chronic): CF = 1.46203_[(ln hardness)(0.145712)]
b No chronic criteria are available for silver.
(c) Applicability. (1) The criteria in paragraph (b) of this section apply to the States' designated uses cited in paragraph (d) of this section and supersede any criteria adopted by the State, except when State regulations contain criteria which are more stringent for a particular use in which case the State's criteria will continue to apply.
(2) The criteria established in this section are subject to the State's general rules of applicability in the same way and to the same extent as are the other numeric toxics criteria when applied to the same use classifications including mixing zones, and low flow values below which numeric standards can be exceeded in flowing fresh waters.
(i) For all waters with mixing zone regulations or implementation procedures, the criteria apply at the appropriate locations within or at the boundary of the mixing zones; otherwise the criteria apply throughout the waterbody including at the end of any discharge pipe, canal or other discharge point.
(ii) A State shall not use a low flow value below which numeric standards can be exceeded that is less stringent than the following for waters suitable for the establishment of low flow return frequencies (i.e., streams and rivers):
Aquatic Life
Acute criteria 1 Q 10 or 1 B 3
(CMC)
Chronic criteria 7 Q 10 or 4 B 3
(CCC)
Human Health
Non-carcinogens 30 Q 5
Carcinogens Harmonic mean flow
Where:
CMC—criteria maximum concentration—the water quality criteria to protect against acute effects in aquatic life and is the highest instream concentration of a priority toxic pollutant consisting of a one-hour average not to be exceeded more than once every three years on the average;
CCC—criteria continuous concentration—the water quality criteria to protect against chronic effects in aquatic life is the highest instream concentration of a priority toxic pollutant consisting of a 4-day average not to be exceeded more than once every three years on the average;
1 Q 10 is the lowest one day flow with an average recurrence frequency of once in 10 years determined hydrologically;
1 B 3 is biologically based and indicates an allowable exceedence of once every 3 years. It is determined by EPA's computerized method (DFLOW model);
7 Q 10 is the lowest average 7 consecutive day low flow with an average recurrence frequency of once in 10 years determined hydrologically;
4 B 3 is biologically based and indicates an allowable exceedence for 4 consecutive days once every 3 years. It is determined by EPA's computerized method (DFLOW model);
30 Q 5 is the lowest average 30 consecutive day low flow with an average recurrence frequency of once in 5 years determined hydrologically; and the harmonic mean flow is a long term mean flow value calculated by dividing the number of daily flows analyzed by the sum of the reciprocals of those daily flows.
(iii) If a State does not have such a low flow value for numeric standards compliance, then none shall apply and the criteria included in paragraph (d) of this section herein apply at all flows.
(3) The aquatic life criteria in the matrix in paragraph (b) of this section apply as follows:
(i) For waters in which the salinity is equal to or less than 1 part per thousand 95% or more of the time, the applicable criteria are the freshwater criteria in Column B;
(ii) For waters in which the salinity is equal to or greater than 10 parts per thousand 95% or more of the time, the applicable criteria are the saltwater criteria in Column C; and (continued)