TITLE 35:
ENVIRONMENTAL PROTECTION
SUBTITLE
C:
WATER POLLUTION
CHAPTER I:
POLLUTION CONTROL BOARD
PART 302
WATER QUALITY STANDARDS
SUBPART B:
GENERAL
USE WATER QUALITY STANDARDS
Section 302.212
Total Ammonia Nitrogen and Un
ionized A
a)
Total
ammonia nitrogen (as N:
STORET Number
00610) shall in no case
exceed
15
mg/L.
b)
The total
~‘n-ioni~edammonianitrogen
(a~
N:
STOP.ET
Numbar
00612)
shall not exceed the acute, a~4
chronic, and sub-chronic standards
shall be
determined by the equations given below ~ubjectto the provisions of
Section 302.208(a) and (b), arid Section 302.213 ofthis Part.
Exceedance
ofeach standard shall be determined by subsections (c)
and (d) ofthis
Section.
1)
The acute standard (AS) shall be calculated using the following
equation:
AS=
0.411
1
+
~
+
58.4
1
±
1
0pH-7.204
From
Apri
0.33 mg!L
1 through Octobe
and
the
Chronic
r, the Acute Standard-(AS)-shall
be
Standard-(CS) shall be
0.057
mg’L.
2)
The chronic standard
(CS) shall be calculated using the following
equations:
A)
During the Summer period,
as defrned in subsection (e) of
this
Section:
i)
When temperature is less than or equal to 14.51°C:
CS=
0.0577
1
+
10
L6~-pH
+
2.487
(2.85)
1
+
10
PH-7688
When temperature
is above
14.5
1°C:
CS
=
0.0577
+
1
+
1
07.o88-pH
2.487
(1.45*
1ØO.O28*(25~T))
1
+
fO~’~7688
Where T
=
Temperature, degrees Celsius
B)
During
the
Winter period, as defined in subsection (e) of
this Section:
i)
When temperature is less
than
or equal to 7°C:
CS
=
0.0577
+
2.487
(1.45*
100504)
1
+
107.b8~-pH
1
+
10PH-1~88
Where T
=
Temperature, degrees Celsius
ii)
When temperature is greater
than
7°C:
CS
=
0.0577
±
2.487
(1.45
*
100.O28*(25~T))
(1
+
107b8~-p~
1
+
1OPW?.688
From
November through March,
the AS
ahall
be 0.14
mg’L and
the CS
shall be 0.025 mg!L.
3)
The sub-chronic standard shall equal
2.5
times the
chronic
standard.
c)
Attainment
ofthe
Total Ammonia
Nitrogen Water Quality Standards
1)
The acute standard shall not be exceeded at
any
time except in those
waters for whichthe Agency has approved a ZID pursuant to Section
302.102.
2)
The 30-day average concentration of
total ammonia nitrogen
(in
mg/L)
shall not exceed the
chronic standard
(CS) except in those waters in
which mixing
is allowed pursuant to Section 302.102.
The chronic
standard
(CS) shall be determined pursuant to subsection (d) ofthis
Section
using at least four consecutive samples collected over a period
ofat least 30
days.
The
samples
must be collected in a
manner
that
assures an average representative ofthe
sampling period.
3)
The four day average concentration oftotal
ammonia nitrogen (in
mg/L) shall not exceed the sub-chronic standard except in
those waters
in
which mixing
is allowed
pursuant
to Section 302.102.
The sub-
chronic standard shall be determined pursuant
to subsection (d) ofthis
Section using at least four consecutive samples collected over a period
ofat least 4
days.
The samples must be collected in
a
manner
that
assures an average representative ofthe samplingperiod.
‘KT
~,-1
4wd-,..1
~
0.941
12(1-~-10~
+
0.0559
+~
pf~~jp~
‘XI
~
k,~.
andN =U 0.944i2(1~-iO~’-0.0559
wtherc:
X=0.090l8~-. 2729.92
-pH
(T
-~
273.16)
U
=
Concentration ofun-ionized armnonia
ai
N in mg,’L
N
=
Concentration of ammonianitrogen ar N in mg!L
uegre
44
44
44
44
44
mirogen
.
~.
.~
~mi~.~n1ffog*n
~
~.
~
computeci
according to the following equations:
U=
N
d)
The water quality standard for each water body shall be calculated based
on the temperature
and pH
ofthe water body at
any particular
time.
The
concentration oftotal ammonia in each sample shall be
divided by the
calculated water quality standard for the sample to determine a quotient.
The water quality
standard
is attained if the mean ofthe sample quotients
is less than
or equal to one for the duration ofthe averaging period.
The
following tables indicates the maximum
total ammonia nitrogen
concgntrationg (mg.’L ac N) allowable pursuant to subsections (a)
and
(b)
of
this
Section for
certain combinations
of
pH
and temperature:
1)
Summer (April through October) Acute
un-ionized ammonia 0.33
mgQ
64
Z~
Z~$
~
2~
2C
5~
1.2?g
~
44~
4$~
4.5q~
~34
ZQ
6Q
4.54
4.5~
4.5~
14~
64
4-S~
4.5~
4.54
444
4.54
234
4.54
444
344
3~
24
44
444
344
344
~
26T~
344
344
344
5~2
34
U
2~,4
444
444
4.34
44
24
32~2
444
344
W~
6~
2)
Summer (April through
October)
Chronic un ionized -an~nonia
0.057
mgfL
pM
8.25
~4~4
1)
Winter (November throuah
March’) Chronic un
ionized
0.O25mgiL
e)
The
Summer period
shall occur from March through October.
In water
bodies that provide habitat for a period of
time
other than March
through
October for early life stages that
are
sensitive to
ammonia,
where the
Winter water quality standard does not provide adequate protection, the
water body shall meet the
Summer
water quality
standard during
the
period oftime early life stages
are
present.
All
other
time periods
shall be
subject to the Winter standard.
BOARD NOTE:Acute
and
chronic
standard
concentrations for total
ammonia nitrogen
(in
mg/L)
for different combinations ofpH
and temperature are shown in Appendix C.
5.5
4.24.
344
444
24
4~2
24
44
03
04
60
3-54
444
344
24
34
44
44
04
0,2
65
44,~
344
444
44
23
44
04
04
0,2
20
244.
444
4.24
44
34
34
03
04
0~2
~4
234
444
4-0,3
34
44
44
04
04
0,2
~Q
26,3
344
&6
34
44
04
04
Q,3
04
U
204
444
24
34
34
03
04
04
04
~0
32~
444
54
34
44.
04
04
0~2 0,4-
-‘I
+~.rni~
Iti1~....1,\
A
,.,,+~
~
0.11
mg!L
pM
64
24
24
345
54
$~25
~4
04
£~
LC
32
04
4.54.
44,2
44,2
444
44,2
~,2
5,2
34
3.5
34
444
344
4413
444
444
54.
.44
34
4~
44
444
4413
4413
4413
44,3
~44
3,3
34
4~
~2
444
444
4413
4413
04.
54
.
29
44
50
4-013
3413
344.
4413
4-23
34
44.
24
04.
55
.4-24
344
4413
3413
4-0~
54
34
24
0,3
60.
444
444
4.54
444
&4
44
34
44
06
pM
64
34
24
345
54
54~
~4
04
2~
32
-013
4413
4413
04
54
.24
44
09
3.5
4,3
444
344
34
4,4
24
3.4
03
4~
44
444
4413
6~3
34
.213
44
0,3
45
3~2 444
4413
44
23
44
04
04
50
4.013
444
4-2,3
44
2~
44
0,3
0,4
55
423
3413
4.0~
34
44
44
04
03
60
4-54
4413
~,3
24
44
04
04
03
(Source:
Amended at
_____
Ill. Reg.
.
,
effective
___________
Section
302.213
Effluent Modified Waters (Ammonia) (Repealed)
~ffluentmodified waters
are those waters
or
portions
of
waters
that the
Agency has determined, pursuant
to
35.Ill. Adm. Code 309:
subpart A,
to
havethe potential to
exceed,
and are therefore not subject to, the ohroni~
ammonia standards of Section 302.212(b) downstream
of an
effluent
outfall and outside of any allowable mixing
zone.
The
Agency shall not
identify
a waterbody as an effluent modified water if it:
1)
has uses known
to be
adversely impacted
by ammonia as
designated under 35
111.
Adm. Code 303.201 outside ofany
allowable mixinci
zone; or
2)
exceeds the
acute
standard
of Section
3012
12(b’)
of
this Part.
b’)
All effluent
discharges
to
an effluent
modified water must
meetthe
requirements
of35 Iii. Mm. Code 301.122(d)
prior
to
dilutiOn with
the
receiving
water
(Source:
Added at 21111. Reg. 370, effective December 23, 1996)
Section 302.APPENDIX A REFERENCES TO PREVIOUS RULES
Section 302.APPENDIX B Sources ofCodified Sections
Section 302.APPENDIX C
Maximum
total ammonia nitrogen
concentrations
allowable for certain combinations ofpH and temperature
PART
304
EFFLUENT STANDARDS
SUBPART A: GENERAL EFFLUENT STANDARDS
Section 304.122
Total Ammonia Nitrogen (as N:
STORET number 00610)
a)
No effluent from
any
source which discharges to the Illinois
River,
the
Des
Plaines River downstream
ofits confluence withthe Chicago
River
System or the
Calumet River
System,
and
whose untreated waste load is
50,000 or more population equivalents shall contain more than
2.5
mg/L
oftotal
ammonia
nitrogen as N during the months ofApril through
October, or 4
mg/L
at other times.
b)
Sources discharging to
any
ofthe above waters
and
whose untreated waste
load
cannot
be computed on a population equivalent basis comparable to
that used for municipal waste treatment plants
and
whose
total ammonia
nitrogen as N discharge exceeds
45.4
kg/day (100 pounds per day)
shall
not discharge an effluent ofmore
than
3.0
mg/L
oftotal.
ammonia
nitrogen
asN.
c)
In addition to the effluent standards set
forth
in subsections (a) and (b) of
this
Section, all sources
are
subject to Section 304.105
un1es~
the
Agency
determinec ac part ofthe 1~TPDESPermit Program under 35111. Adm.
Code
309:
Subpart
A that alternate effluent
standards
are applicable pursuant to
subsection (d) ofthic Section.
d)
All
dicchargers to effluent modified waters as defined
at 35 Iii. Adm.
Code
302.2 13, except for
treatment
works qualifying under Section 301.120(c),
shall have an effective NPDES permit with monthly average effluent
limitc of 1.5 mg/L total ammonia asN during the months ofApril through
October, and 1.0 mg/I. total ammonia as N at other times, as well as the
following rectrictionc:
1)
Dicchargers achieving lower ammonia concentrationc than given
above, yet not meetingthe chronic water quality standards of35
Iii. Mm.
Code 302.212(b), shall maintain their existing level of
performance consistent with the facility’s expected organic and
hydraulic loadings for the duration oftheir NPDES permit.
2)
New or expanded discharges that increase an~onia
loading-to
general use waters and/or create effluent modified waters or
portions ofwaters must demonstrate compliance to the Agency
with the nondegradation reqmremento at 35 Iii
A
.1.~
302.105.
(Source:
Amended at
______
Ill. Reg.
______,
effective
___________
CHO2/22142508.1
