ILLINOIS POLLUTION CONTROL BOARD
October
5,
1982
IN THE MATTER OF:
)
)
AMENDMENTS TO CHAPTER
6:
)
PUBLIC WATER SUPPLIES
)
(Trihalomethanes)
Adopted Rule.
Final Order.
OPINION AND ORDER OF THE BOARD
(by J.
D.
Dumelle):
On July 21,
1982 the Board adopted a Proposed Rule/Second
Notice Opinion and Order in this matter.
The Second Notice
period commenced on August
3,
1982 and expired on September
16,
1982 when the Joint Committee on Administrative Rules notified
the Board of its determination that no objection to this rule-
making would be issued.
During the Second Notice period the Board’s public water
supply regulations were restructured to conform with the codi-
fication system.
What had been Chapter 6:
Public Water Supply,
became Illinois Administrative Code Title 35:
Environmental
Protection;
Subtitle F:
Public Water Supplies; Chapter I:
Pollution Control Board.
As a result,
the proposed rules have
necessarily been modified to conform with the new structure of
the Public Water Supplies rules.
The following table is presented to show the relationship
between the proposed Chapter 6 rules as they appeared for First
Notice at
6 Illinois Register 6052
(May
21, 1982)
and the
new
codified, adopted sections of 35 Ill.
Adm. Code:
104
601.105
304
(Table I)
604.202
304(A)(2)(a)
604.102(a)
304(B)(3)
604.204
304(B)(4)
604.203(d)(3)
304(B)(5)
604.203(d)(1)
304
Table
I, Note (a)
604.203(b)
304
Table
I,
Note
(b)J
604.203(c)
304
Table
I, Note (c)
604.203(e)
304
Table
I, Note
(d)
604.203(a)
304
Table
I, Note (e)3
604.203(d)(2)
309(B)(l)(a)
605.103
309(B)(l)(b)
605.104(a)
309(B)(2)(a)
605.103
309(B)(2)(b)
605.104(b)
R81—Il
Proposed Chapter
6 Rules
Codified, Adopted
Sections
49-101
2
Proposed Chapter
6
Rules
Codified, Adopted
Sections
309(B)(3)
605.104(c)
309(B)(4)
605.104(d)
309(C)(l)(a)
605.105
309(C)(l)(b)
605.l06(a)—(d)
309(C)(1)(c)
605.106(e)
The Board’s rationale
for adoption of these rules has remained
unchanged from that expressed
in its July 21,
1982 Opinion and Order,
but while the Board adopts that Opinion as its final Opinion in
this
matter,
the following changes must be noted:
1.
The definitions of “Halogen,” “Trihalomethane
(THM),”
“Total
Trihalomethanes
(TTHM),” “Maximum Total Trihalomethane Poten-
tial
(MTP)” and “Disinfectant” will be added
to Section 601.105.
2.
The proposed amendment to old Rule 304(A)(2)(a)
to correct
a typographical error is no longer necessary in that the
correction was made during the codification procedure
Section
604.102(a).
3.
The proposed amendment of Rule 304(B) (3)
is no longer
necessary due
to the restructuring of the Maximum Allow-
able Concentration rules
(Section 604.204).
4.
The Maximum Allowable Concentration of Trihalomethanes
will appear
in Section 604.202, while compliance dates
and the method for determining compliance with the THM
standard appear in Section 604.203(e).
5.
The reduced frequency of chemical analysis sampling now
appears
in Section 605.103.
6.
THM sampling and monitoring frequencies now appear in
Section 605.104.
7.
The correction of a typographical error regarding gross
alpha activity now appears
in Section 605.105.
Furthermore, the addition of Section 605.104
(see 5, above)
requires the renumbering of Sections 605.104—605.109 which have
become 605.105—605.110, respectively, and a citation error has
been corrected in renumbered Section 605.106.
None of these changes are substantive, and the Board intends
to adopt these rules as proposed for Second Notice as codified.
ORDER
The Board hereby adopts the following amendments to 35 111..
Adm. Code 601,
604 and 605 and instructs the Clerk to file these
rules with the Secretary of State:
49-102
3
TITLE
35:
ENVIRONMENTAL
PROTECTION
SUBTITLE
F:
PUBLIC
~7ATER SUPPLIES
CHAPTER
I:
POLLUTION CONTROL BOARD
PART 601
Section 601.105
Definitions
For purposes of this Chapter:
“Disinfectant” means any oxidant, including but not limited
to
chlorine, chlorine dioxide, chloramines, and ozone,
added to
water in any part of the treatment or distribution process, which
is intended
to kill_or inactivate pathogenic microorganisms.
“Halogen” means one of the chemical elements chlorine, bromine
or iodine.
“Maximum Total Trihalomethane Potential
(MTP)” means_the_jnaxim~
concentration of total trihalomethanes produced in a given water
containing a disinfectant residual after
7 ~
of 25°Cor above.
“Total Trihalomethanes
(TTHM)” means
the sum of the concentration
in milligrams per liter of the_trihalomethane compounds trichioro—
methane (chloroform), dibromochloromethane, bromodichloromethane
and tribromomethane
(bromoform),
rounded to two significant
figures.
“Trihalometharie
(THM)” means one of the family of organic com-
pounds named as derivatives
of methane, wherein three of th~
four hydrogen atoms
in methane are each substituted by a halogen
atom in the molecular structure.
PART 604
Section 604.202
Contaminants and Maximum Allowable
Concentrations
The concentration of substances
in the finished water
shall not
exceed the limits
listed, except as provided in Section 604.203.
49-103
4
Arsenic
Barium
Cadmium
Chromium
Copper
Cyanide
Fluoride
Iron
Total
Selenium
Silver
Turbidity
Zinc
As
Ba
Cd
Cr
Cu
CN
F
Fe
Pb
Se
Ag
NTU
Zn
0.05
1.
0.010
0.05
5.
0.2
1.8
1.0
0.05
0.15
0.002
10.
0.001
0.003
0.05
0.001
0. 0002
0.0001
0.0001
0.004
0.1
0.005
0.01
0.01
0.10
D~01
0.05
1.
5.
Section 604.203
Exceptions to Maximum Allowable Concentrations
The following supplementary conditions apply to the concentra-
tions listed in Section 604.202.
a)
Fluoride: Those counties of the State north of and
including the counties of Henderson, McDonough,
Fulton,
Tazewell, McLean,
Ford and Iroquois shall have a maximum
allowable fluoride concentration of 2.0 mg/l.
Substance
Reported
Maximum
Concentration
~~_____
As
Lead
Manganese
Mn
Mercury
Hg
Nitrate-Nitrogen
N
Organics
Pesticides
Chlorinated
Hydrocarbon
Insecticides
Aidrin
Chlordane
DDT
Dieldrin
Endrin
Hept ach 1 or
Heptachlor
Epoxide
Lindane
Methoxychlor
Toxaphene
Chiorophenoxy Herbicides
2,4—Dichlorophenoxyacetic
acid
(2,
4—D)
2, 4, 5—Trichlorophenoxypropionic acid
(2,4,5—TP or Silvex)
Trihalomethanes
49-104
5
b)
Iron
arid
Manganese:
1)
Community
water
supplies
which
serve
a
population
of
1000
or
less
or
300
service
connections
or
less
shall
be exempt from the standards for iron and manganese.
2)
All other water supplies shall comply with these
standards by July
1,
1981.
Iron in excess of 1.0 mg/i
and
manganese
in
excess
of
0.15
mg/i
may
be allowed at
the
discretion
of
the
Agency
if
sequestration
tried
on
an
experimental
basis
proves
to
be
effective.
If
sequestering
is not effective, positive iron or manga-
nese reduction treatment as applicable must be provided.
No experimental use of
a sequestering agent may be
tried without previous Agency approval.
c)
Nitrate—Nitrogen:
The
provisions
of
Section
604.204
notwithstanding,
compliance
with
the
maximum
allowable
concentration for nitrate shall be determined on the
basis of the
mean
of
two
analyses.
When
a
level exceeding
the maximum allowable concentration for nitrate
is found,
a second analysis shall be initiated within 24 hours,
and
if the
mean
of
the
two
analyses
exceeds
the
maximum allow-
able concentration, the owner or operator of the public
water supply shall report his
findings to the Agency pur-
suant to 35 Ill. Mm.
Code 606.102 and shall notify the
public pursuant to
35 Ill.
Adm.
Code 606.
d)
Total Trihalomethanes:
1)
The
average
of
Total
Trihalomethanes
concentration
in
the finished
water
of
four
samples
of
any
four
consecu-
tive quarters per treatment plant or per aquifer shall
not exceed the limit listed in Section 604.202.
2)
Supplies serving 75,000 or more individuals shall com-
ply with the Total Trihalomethanes standard listed_ta
Section 604.202 by the effective date of these regula-~
tions.
Supplies
serving
10,000
to
74,999
individuals
shall
comply
with
this
standard
by
November
5,
1983.
This
standard
does
not
apply
to
supplies
servi~
less
than
10,000
individuals.
3)
If
the
average
of
samples
covering
any
twelve—month
period
exceeds
the
Maximum
Allowable
Concentration_~2~
Total Trihalomethanes,
as listed in Section
604.2021!
the owner or operator of the supply
shall
notify
the
Agency pursuant to Section 606.102 and give notice to
the public pursuant
to Sections 606.201 —_606.205 of
these
Rules.
Monitoring
after
public
notification
shall
be
at
the
frequency
required
by
Section
605.103.
49-105
6
~+e)
Turbidity:
1)
Turbidity
in
drinking
water
shall
not
exceed
one
turbidity unit at the point where water enters the
distribution
system
unless
it
can
be
demonstrated
that
a
higher
turbidity
not
exceeding
5
Nephelorietric
Turbidity
Units
(NTU)
does
not:
A)
interfere
with
disinfection,
or
B)
cause
tastes
and
odors
upon
disinfection,
or
C)
prevent
the
maintenance
of
an
effective
dis-
infection agent throughout the distribution
system, or
D)
result
in
deposits
in
the
distribution
system,
or
B)
cause customers
to question the safety of their
drinking water.
2)
The provisions of Section 604.204 notwithstanding,
if a turbidity measurement exceeds the maximum allow-
able concentration, a resample must be taken as soon
as
practicable,
and
preferably within one hour.
If
the
check—sample
confirms
that
the
standard
has
been
exceeded, the Agency must be notified within 48 hours.
The
value
of
the
check—sample
shall
be
the
value
used
in
calculating
the
monthly
average.
If
the
monthly
average
of
the
daily
samples
taken
in
accordance
with
35
Ill.
Adm.
Code
605.l0~9 exceeds
the
maximum
allowable
concentration, or
if the average
of
two samples taken
on consecutive days exceeds
5
NTTJ,
the
owner or
operator
of
the
public
water
supply
shall
report
to
the
Agency
and notify the public
as
directed
in
35
Ill.
Mm.
Code 606.
PART 605
Section 605.103
Frequency of Chemical Analysis Sampling
A minimum of one representative sample each of
the raw and
finished water is to be submitted every year to the Agency’s
laboratory for chemical analysis from community water supplies
which utilize a surface water source.
Community water supplies
which utilize a ground water source are to submit e~e~i
finished
water samples to the Agency for analysis at least every ~wo
three
years.
Sampling
for
specific
parameters
may
be
required
b~ the
Agency
more
frequently
whenever
there
is
reason
to
believe
that these parameters are or may be
in excess of the limits listed
in 35 Ill.
Adm.
Code
604.202
and
604.203,
or
if
the presence of
other dangerous or potentially dangerous substances
is suspected.
49-106
7
Section 605.104
Freque~g~~r.ihalomethane
Analysis Samp1inq~
a)
Surface Water Sources:
Supplies serv~ over 10,000 indi-
viduals shall submit at least_f~ursamples ~pertreatment
~iant per quarter for analysis or analytical results_from
a certified laboratory for Total Trihalomethanes to the
7~gency.
After results of four consecutive quarters demon-
strate consistent Total Trihalomethanes concentrations
below the Maximum Allowable Concentration, and upon written
application by the supply, the Agency may reduce the san~ple
frequency to one sample per quarter until the Maximum Allow-
able Concentration
is
exceeded
or
~
in
source
or
treatment
method
is
made.
Ground Water Sources:_Supplies serving
‘°L°°°
individuals
or
more
shall
submit
at least one sample per treatment plant
for MTP analysis.
After written request by the supply and
the determination by the Agency that the results of the
sample and local conditions indicate_~at~the supply
is
not likely to approach or exceed the Maximum Allowable
Concentration, the supply shall continue to submit one
annual sample per treatment plant,
or report of analysis
by a certified laboratory to the
jency.
If the sa~le
exceeds the Maximum Allowable Concentration or cannot be
analyzed for MTP, the supply shall submit samples
in
accordance
with
Section
605,103.
c)
Significant
changes
in
water
sources
or
treatment
will
require testing in accordance with Section 605.104(a).
d)
If the result of an analysis
made
j~ursuaritto the reduced
monitoring Schedules_provided by Section 605. 104(a)
indicates
that
the
level
of
Total
Trihalomethanes
exceeds
the
Maximum
Miowable
Concentration
listed
in Section 604.202, the owner
or operator of the supply shall
initiate analysis of
one
check sample promptly after the exceedance
is reported to
the supply.
If the check sample confirms that the level of
Total Trihalomethanes exceeds the Maximum Allowable Concen-
tration, the supply shall sample
in accordance with the fre-
quency set out in Section 605,104(a),
for at least one year.
Section
605.1045
Monitoring Requirements for Radium—226, —228
and Gross Alpha Particle Activity
a)
Compliance with 35
Iii.
Mm.
Code 604.301 shall be based
on the analysis of an annual composite of four consecutive
quarterly samples or the average of the analyses of four
samples obtained at quarterly intervals.
49-107
8
b)
A
gross
alpha particle activity measurement may be sub-
stituted for the required radium—226 and radium-228
analysis, provided that the measured gross alpha particle
activity does not exceed
5 pCi/l
at a confidence
level of
95 percent
(l.696
sigma where sigma
is
the standard devia-
tion of the net counting rate of the sample).
In localities
where radium—228 may be present in drinking water, radium—
226 and/or radium-228 analyses may be required by the Agency
when the gross alpha particle activity exceeds
2 pCi/i.
c)
When the gross alpha
particle
activity
exceeds
S
pci/i,
the same or an equivalent sample
shall be analyzed for
radium—226.
If the concentration of radium-226 exceeds
3
pCi/i,
the
same
or
an
equivalent sample shall
be ana-
lyzed for radium—228.
d)
A supply using two or more sources having different concen-
trations
of
radioactivity
shall
monitor
source
water
in
addition
to
water
from
a free-flowing
tap, when required
by the Agency.
Section 605.lOS6
Monitoring Frequency for Radium—226, —228
and Gross
Alpha Particle Activity
Suppliers
of
water
shall
monitor
at
least
once
every
four
years.
When an annual record taken in conformance with Section 605.1045
has established that the average annual concentration
is less
than half the maximum contaminant levels established by 35 111.
Mm. Code 604.301, analysis of a single sample may be substituted
for the quarterly sampling procedure required by Section 605.1045.
a)
More frequent monitoring shall be conducted when required
by the Agency in the vicinity of mining or other operations.
b)
Monitoring
for compliance with radium—228 levels need be
done only in the initial
test of each source and when
specifically requested by the Agency, provided that
the
average annual concentration of radium—228 has been assayed
at least once using the quarterly sampling procedure
required by Section 605.104(a)+~.
c)
Owners and operators of supplies shall conduct annual moni-
toring of any community water system in which the radium—226
concentration exceeds
3 pCi/i,
except when specifically
exempted by the Agency.
d)
Monitoring at quarterly intervals shall be continued until
the annual average concentration no longer exceeds the
maximum contaminant level or until
a monitoring schedule
as a condition to
a variance, exemption or enforcement
action shall become effective.
49-108
9
e)
If the average annual maximum allowable concentration
for
gross alpha particle activity or total radium
is exceeded,
the owner or operator of a community water supply shall
give notice to the Agency and notify the public as required
by
35
Iii.
Adm.
Code
606.
Note:
Sections
605.106-605.109
have
been
renumbered
as
Sections 605.107—605.110, respectively.
IT IS SO ORDERED.
I,
Christan
L.
Moffett,
Clerk
of
the
Illinois
Pollution
Control
B~aLrd, hereby certify that the above Order was
ad9pted
on the
~
“
day
of
~-~y~
‘~‘
~__,
1982 by a vote of
~
~
~
Christan
L.
Moffettj
Clerk
Illinois
Pollution
Co’nt~to1 Board
49-109