ILLINOIS POLLUTION CONTROL BOARD

April

29,

1982

IN THE MATTER OF:

)

AMENDMENTS TO CHAPTER

6:

)

R81—11

PUBLIC WATER SUPPLIES

(Trihalomethanes)

PROPOSED RULE.

FIRST NOTICE.

ORDER OF THE BOARD

(by J.D.

Dumelle):

On January 30,

1981 the Illinois Environmental Protection

Agency (Agency)

filed a proposal for rulemaking in this matter,

Merit hearings were held on May 15,

1981 and May 29,

1981.

On

June

15,

1981 the Agency amended its petition.

On February 3,

1982 the Institute of Natural Resources

filed its study entitled

Economic Impact of Proposed Trihalomethane Standards for Public

~~Suli~,

Document No.

80-254 and hearings were held

considering that study on April

2 and

8,

1982.

Finally, on

April

14, 1982 the Agency filed comments on the proposed rule-

making and the comment period closed on April 23,

1982.

The Board hereby instructs the Clerk of the Board to proceed

to First Notice in this matter and will propose the amendments

exactly as the Agency has proposed them,

as amended.

These rules

are in conformity with the Safe Drinking Water Act

(P.L.

93—523)

and must be adopted

in order for the State to retain primacy.

No

one has testifed or commented against these rules as amended,

and

the economic impact study indicates that this proposed rules will

result in a net economic benefit for the State.

The proposed amendments to Chapter

6:

Water Pollution, ~re

indicated below

(added language

is underlined; deleted language

is stricken).

Rule 104

Definitions

note:

the following definitions are to be

inserted alphabetically into the present definitions.

~~oen”

means one of the chemical elements chlorine,

bromine or iodine.

“Trihalomethane(THM)’~means one of the family of organic

compounds,

named as derivatives of methane, wherein three of

the four hydrogen atoms in methane are each substituted~a

h~àlogenatom in the molecular structure.

46—253

---

“Total

Trihalomethanes

(TTHM)” means the sum of the concen~~

~ration

in

mu li1rarns per

liter

of

the

trihalomethane

comppunds

trichioromethane

(chloroform), dibromochloromethane,

bromodi—

chloromethane and tribromomethane

(bromoform)), rounded to two

~ificant~es.

!‘Maximum

Total

Trihalomethane Potential

(MTP)” means the maximum

concentration of total trihalomethanes produced in a given water

conta~ni~

a

sin

ctan

dlafter

7

days

at

a

te~p~ture

of

25 C or above,

“Disinfectant” means any oxidant1

din

but not limited to

chlorine,

chlorine

dioxide,

chioramines,

and

g~~rie~

added

to

water in a~_partof the treatment or

distribu~g~j

rocess,

which

is intended to kill

or

inactivate

pathogenic

microorganisms.

304

Finished Water

Quality

A,

Bacteriological Quality

1.

Standard Sample

The standard sample

for the coliform test shall

consist of:

a.

For the membrane filter technique,

not less

than 100 milliliters,

b.

For the fermentation tube method,

five stand-

ard portions of either 10 milliliters or 100

milliliters.

2.

Total Coliform Limits

The number of organisms of the coliform group

present in potable water,

as indicated by

representative samples examined,

shall not

exceed the following limits:

a.

When the membrane filter technique is used,

arithmetic mean coliform density of all

standard samples examined per month shall

not exceed ~

one per 100 milliliters,

~

individual

standard

sa~~~aU

not exceed

four coliform colonies per 100 milliliters

in:

(1)

more than one standard sample when less

than twenty are examined per month; or

(2)

more than five percent of the standard

samples when twenty or more are examined

per month.

46—254

---

note:

the remaining text of subsection A remains unchanged

from present rules,

B.

Chemical and Physical Quality

1.

The finished water shall contain no impurity in

concentrations that may be hazardous to the health

of the consumer or excessively corrosive or other-.

wise deleterious to the water supply.

Drinking

water shall contain no impurity which could reason~-

ly be expected to cause offense

to the sense of

sight, taste, or smell.

2,

Substances used in treatment should not remain in

the water in concentrations greater than required

by good practice.

Substances which may have a

deleterious physiological effect, or for which

physiological effects are not known,

shall not he

used in a manner that would permit them to reach

the consumer,

3.

If the result of an analysis made pursuant to

these

Rules indicates that the level of any

contaminant listed in Table I,except Total

Trihalomethanes, exceeds the maximum allo~able

concentration, the owner or operator of the

public water supply shall report to the Agency

within

7 days and initiate three additional

analyses at the same sampling point within one

month.

When the average of four analyses, rounded

to the same number of significant figures

as the

maximum allowable concentration for the substance

in question, exceeds the maximum allowable concen-

tration, the owner or operator of the public water

supply shall notify the Agency pursuant to Rule

310 B and give notice to the public pursuant to

Rule 313 D of these

Rules.

Monitoring after public

notification shall

be at

a frequency designated by

the Agency and shall continue until the maximum

allowable concentration has not been exceeded

in

two successive samples or until a monitoring

schedule as

a condition to

a variance or enforce-

ment action shall become effective.

4.

If the average of samples covering any twelve month

period exceeds the maximum allowable concentration

for Total

Trihalomethanes,

as listed in Table

‘L

the owner or operator of the public water supply

shall notify the Agency pursuant to Rule 310 B and

give notice to the public pursuant to Rule 313 D of

these Rules.

Monitoring after public notification

shall

be at the frequency required by Rule 309 B

or until

a monitoring schedule as

a condition to

46—255

---

—4—

a variance or enforcement action shall become

effective.

-4~

5.

The concentration of substances listed in Table

I, except for Total Trihalomethanes, shall not

exceed

in the finished water the limits listed,

The

average

of Total Trihalomethanes concentra-

tion in the finished wate~

mles of

any four consecutive quarters per treatment

~~guifershal

1 not exceed the

limit listed in Table

I.

TABLE

I

MAXIMUM ALLOWABLE CONCENTRATIONS

FINISHED WATER QUALITY

Reported

Maximum

Concentration

Substance

As

mg/i

Arsenic

As

Barium

Ba

Cadmium

Cd

Chromium

Cr

Copper

Cu

Cyanide

CN

~‘1uoride

F

Iron

Fe

Lead

Pb

Manganese

Mn

Mercury

Hg

Nitrate-Nitrogen

N

Organic

S

Total Trihalomethanes

______

Pesticides

Chlorinated Hydrocarbon Insecticides

Aidrin

chiordane

DDT

Dieidrin

Endrin

Heptachior Epoxide

Lindane

Methoxychior

Toxaphene

Chiorophenoxy Herbicides

2, 4—Dichiorophenoxyacetic acid

(2, 4-D)

0,05

1.

0,010

0,05

5,

0.2

1,8(d)

1,0(a)

0,05

0,15(a)

0.002

10, (b)

0,10(e)

0,001

0. 003

0.05

0.001

0. 0002

0,0001

0.004

0,1

0.005

0,1

46—256

---

2, 4,

5-Trichiorophenoxypropionic acid

0. 01

(2,4,5—TP or Silvex)

Selenium

Se

0,01

Silver

0.05

Turbidity

NTU

1v~(C)

Zinc

5.

NOTES:

a.

All

non—community water supplies and those community water

supplies which serve a population of 1000 or less or 300

service connections or less shall be exempt from the stand-

ards

for

iron and manganese.

All other water supplies shall

comply

with these standards by July 1,

1981.

Iron in excess

of 1.0 mg/l 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 manganese

reduction

treatment as applicable must be provided.

No

experimental use of a sequestering agent may be tried

without

previous Agency approval.

b.

The provisions of Rule 304

B

3 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 allowable concentration, the owner or operator

of

the public water supply shall report his findings to the

State pursuant to Rule 310 B and shall notify the public

pursuant to Rule 313

D.

c.

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 NTU does not:

(1)

interfere with disinfection, or

(2)

cause tastes and odors upon disinfection, or

(3)

prevent the maintenance of an effective disinfection

agent throughout the distribution system, or

(4)

result in deposits

in the distribution system, or

(5)

cause customers to question the safety of their drinking

water.

The provisions

of Rule 304

B

3 notwithstanding,

if

a turbidity

46—257

---

measurement exceeds

the

maximum

allowable concentration, a

resample

must

be

taken as soon as practicable,

and

preferably

within

one

hour.

:f

the

chec:k

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 calculatinq the

monthly

average.

If

the monthly average

of the daily

samples

taken

in

accord-

ance with Rule 309 D exceeds the maximum allowable con-

centration,

or

if the average of two samples taken on

consecutive

days exceed-s

5 NTU, the owner or operator of

the public water

supply shall report to the

Agency and

notify the public

as directed in Rule 310

B

and

313

D.

d.

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 concen-

tration of

2,0 mg/i.

e.

Community water

!U~

ies servin

75,

000 or more individuals

shall comply with this standard by the effective date of

these ~

supplies serving 10,000

to

74,999 individuals shall com~ywith this standard by

November

5,

1983.

This standard

does ~

serving

less_than 10,000 individuals,

C.

Radiological

Quality

The

text

of

Subsection C

remains

unchanged

from

present

rules,

309

Frequency

of

Sa~~n

A.

Bacteriolo~ical

Text

of

Subsection

A remains unchanged.

B.

Chemical

1,

~unit~yWaterSu

lies

~-

Surface

Water

Sources

a.

A

minimum

of one representative

sample

each

of

the

raw

and

finished water is to

he

submitted

at

least

annually

to

the Agency for chemical analysis. 4!~e~

~

wa~e~-~e~ee.?emty-wa~ef-ppe~—wh~eh

~

~

~

~7—e~-±~-the-!ese3~1ee-e~-e

e~-elaft~e~fe~s

-ef

~

~~ees——spee~e~—

~

a~ve- ~

46—258

---

-

)o~et~y-io~ehem±eaa~-y-—a~

ne

-~

~

y the~Ageney~

b.

Publicw te~ i~J~lLO-~arv~~over 10,00Oindi

-

vi~iua1i~.

1LI~aS*COUrS\~eS

per

U~eatn~nt

J!

~ai

ten for anal

i~or

anal vt

a~ut~

~ro:racertit 1ed

for

total trihaiomethanas

to the Aeric,

After

resut~of f u~c

ii

~

consistent

~otai t~ihalomethaneconcentrations

below

the

M

‘c~mum A

l~ab’e

Concentration,

and

!~1~tte

i

wpist

i

o~~~bli~jqater

~~thc

\jerc~y ma~y~

reduce~~ml~

fre~ucrj

on

~R

)e~uarterunti

1

the

Maxim.m

qa~l?.

~cr~entration

is

exceeded

orurtia~ijfi

‘a ~t ~hang~ in source or

treatn~nt

ttod

is

made

2.

Comma ~

r u~~s~G round Water Sources

a,

Amin~ainlo?

sentativ~a~~ the

finished

q

ter

i-

t

be submitted at least

~t~ire~

~yer

-~

othe\~cj~9~hem

ica.

—

~

w~rpes—weh

a~-

~eu

t~4 wafeufee—afe—te—~

~eh

~ampins

te~-the-Age~ey~atease-~-y~we

yeaf

b.

Pub

ii

wake

~uj~J

e

servin~j~Q~9OOindividua ls

or

mor~sha

~u

~a

east

o~~leer

trea

ye

L ~

~

deterr~rati

o~ t~ic \j~c~that

the

results

otth~.

-

~cncitions

indicate

thVt

the

‘~ot_)ikjy~pp~~hor

exceed

the

~iz

mu:

Al

owable

Concentration,

f~heJ1ubl~a

&

j~iyhaUcontinueto

submit

re

n

p

~

~~mentlant,

~ysi~y~ ~~jifiedlabo~~tor

E

e

barq~le

exe eeds

the

Maxin

r

t.

C

ic-entration

or

cannot be

~y~ed

‘r

~1’

~1

i~sul~all

~~4tsames

in

-cordancewithSe

c. 309

B

1,

3,

Si

nit:

-ic

~n~nci--s

ir.

water

sources_or

treatment

w.~ilr~

rc

. -

r~

in

~ecord

with

Sec.

309B1b~

4.

If the

re sul

~.a

ara~y~.

~

to the

red

c-ed

~or~t

mc-

Lel edul

iedb

this

Rule

indicate~

th,t

tie

evel

of

Total_Trihalomethanes

exceeds_the

maximum

allowable

concentra~T~ listed

in

Table

I,

theowre~g~peratoro

f

the

p~ic

wa±ers~

~

sha~l initiate

~py!~on~heck

s~or~pt’

yaf~erg~dan2~sr!Iorted

---

tote

t

-.

confi~i

exceedat

witht

~

5.

Samplirg

~cr

r

c

-ç

the Ager

r

to believe

,i

excess

~.

tc-

3

presenc-

of o

dangerous

6.

Non—Commun~

ative

sari le.~

Agency

a

c-i

frequercie’

C.

Monitorirg

~

C

Water u~~Lc~.

1.

Mor t—ori

nan ~c

-~

it techecksa~le

£~o.al Tnihalomethanes

‘~a)1ecor~entration,_the

r

in Rule 309

B

1 b,

for

araneters may be required

by

~..iv

~henever there is

reason

r

ic-tens

ire or may be in

.ed in

fat Ic I or if the

rour or o t ntially

—

su eec-ted

~p e~shal

submit represent—

d

fir ished water to the

r ctemi(al analysis at

inc Agency.

t

Rmdioactivity in Community

ic-

urnin

s

for gross alpha

~

.jr~226and radium—228.

a,

Coil

‘i-.

ial~

e based

on the analysis

of

n enr~a

composite of four

consecutive

r

j

~rples

or the average of the

a.

r ~an icc obtained at

in p&ti’ie activity

c substituted

for

ii

.

id.~urr~226

and

radium—

rio

teed that the

a pha particle

activity

-

nc~eel5 pCi/I at a confidence

~

irccnt

4...~65 1.96

~‘

where

t,

i~

.hc s~ardarddeviation of the net

r

c cf the sample).

In

rr~ admum—228 may be

-

~rk rg water radium—226

~O

i

r~

ii

—228 analyses may be

me

t.

mm

~ b

the Agency when the

gross

~ciic

in activity

exceeds

2

pCi/i,

note:

the

remainirg be t of ~

the

present rules.

~.r

(

remains unchanged from

IT IS SO ORDERED.

---

I,

Christan

L,

1o

et

c

a

Pollution

Control

Board

hereby

certify

~s

otuve

Order

eas

adopted

on

~eSj~

day

of

1.98 a

b

~

vote

of

Cr

teen

I.

MofteJ~O1erk

-

-i

3-

2oJii

Lion

Contrñ

Board

I-