Conclusion

Exhibit A
Exhibit C

BEFORE THE

THE MATTER OF:

)

PROPOSED

AMENDMENTS

AMMONIA

)

R02-19

NITROGEN

STANDARDS

35111.

Adm. Code

)

302.212, 302.213, and 304.122

)

NOTICE OF FILiNG

Please see attached Service List

PLEASE

TAKE NOTICE that I have today filedwith the Office ofthe Clerk ofthe

Pollution Control Board the POST-1IEA1UNG COMMENTS ofthe flhinois Environmental

Protection Agency,

a copy ofwhich is herewithserved upon you.

ENVIRONMENTAL PROTECTION AGENCY

OF THE STATE OF ILLINOIS

Tw~

RJJiL9~

Deborah

Williad~/

Assistant Counsel

Division ofLegal Counsel

DATED:

May 15, 2002

Illinois Environmental Protection Agency

1021

North GrandAvenue East

Post Office Box 19276

Springfield, Illinois 62794-9276

(217)

782-5544

)

CE 1~/ED

CLERIç~

OFFICE

MLIV

2002

BOARD

STATE

Pollut,0,~

Contr01

Board

THIS

FILING

IS SUBMITTED ON RECYCLED PAPER

RECEIVED

CL!~K’S

OFFICE

BEFORE

THE

ILLINOIS POLLUTION CONTROL BOARD

2002

STATE OF

ILLINOIS

IN THE MATTER OF:

)

Pollution

Control Board

R02-19

PROPOSED AMENDMENTS TO

)

(Rulemaking-Water)

AMMONIA NITROGEN STANDARDS

)

35 ILL. ADM. CODE 302.212, 302.213,

)

AND 304.122

)

POST-HEARING COMMENTS OF THE

ILLINOIS ENVIRONMENTAL

PROTECTION AGENCY

NOW

COMES

the

ILLINOIS

ENVIRONMENTAL

PROTECTION

AGENCY

(“Illinois

EPA”),

by its

attorney,

Deborah

Williams,

and

hereby submits comments

the above rulemaking proceeding.

The Illinois

EPA

appreciates the

Illinois Pollution Control

Board’s

(“Board”)

efforts

in this rulemaking to amend the ammonia

nitrogen water quality standard and welcomes

the

opportunity

make

these

comments.

The

Illinois

EPA

believes

the

proposed

amendments

submitted

Illinois

Association

of Wastewater Agencies

(“IAWA”)

will

meet federal requirements and will continue to assure

protection of the water resources

the

State

Illinois,

while

recognizing

the

need

for

continued

development

and

utilization of these resources.

IAWA’S AMENDED PROPOSAL

The Illinois

EPA submitted pre-filed testimony of Robert Mosher in this matter on

March

1, 2002.

Mr. Mosher’s testimony was entered as Exhibit

9 at the

March 25,

2002

Chicago hearing.

In this pre-filed testimony, the Illinois EPA suggested several changes

to IAWA’s original regulatory proposal.

On April 3, 2002, IAWA filed an amended

rulemaking proposal which incorporated

all of the changes suggested by the Illinois

EPA.

In addition,

IAWA attempted to address

the issues raised by the Board at the

March

25th hearing.

The Illinois EPA agrees with

all of the changes contained

IAWA’s amended rulemaking proposal and believes they adequately address the issues

raised by the Board while remaining

consistent with

the federal National Criteria

Document, the

Board’s existing regulatory structure and the programmatic needs of the

Illinois

EPA.

The specific changes made by IAWA in response to the

Board’s

comments were changing the term Summer and Winter to Early Life Stages Present

and Early Life Stages Absent,

adding

the term water before the word temperature

several places, adding

a definition ofthe term

early life stage and changing the method

for evaluating attainment of the sub-chronic water quality standard to require that the

four samples utilized must be taken on four consecutive days.

The Illinois

EPA agrees

with

IAWA’s conclusion that inclusion of the

term indigenous

is not necessary based on

the testimony presented

by IAWA’s witness

Mr.

Robert J.

Sheehan and the

Illinois

EPA’s internal review.

TYPOGRAPHICAL SUGGESTIONS

Although the

Illinois

EPA is

in agreement with

the substance of IAWA’s amended

proposal, the Agency would like to point

out

a few minor typographical issues for the

Board’s consideration

in drafting a first notice order.

IAWA does

not add the term

“water” before the word temperature in

a few places

in the amended proposal.

These

occur in the equations found

in Section 302.212(b)(2)(A) and (B).

The Board may want

to considering adding the

term “water” before “temperature”

in these two places also.

In the equations found

in Section 302.212(b)(2), placement ofthe

phrase “Where

Temperature, degrees Celsius” is not consistent.

In Section 302.212(b)(2)(A)(ii),

the

phrase appears after the equation, while it appears before the equation in

Section

302.212(b)(2)(B)(ii).

The Board may want to consider achieving consistency between

the two sections by changing the equation

Section 302.212(b)(2)(B) to match the

equation

in Section 302.212(b)(2)(A).

In Table C-2 of IAWA’s amended proposal, titled

Temperature andpH-

Dependent Values of the CCC (Chronic Criterion) for Fish Early Life Stages Absent,

there are five instances where

it appears that the ammonia values have been rounded

to one decimal

point and reported with two decimal points.

For the values with

a pH of

6 and temperatures of 12,

13,

14,

15 and

16,

the ammonia values should be 8.17, 7.66,

7.19, 6.74

and 6.32

respectively instead of 8.20, 7.70,

7.20, 6.70 and 6.30 as reported.

Responses

to questions raised

at the March

25 and April 23 hearings

Though the

Illinois EPA

responded to most issues raised at the first and second

hearings in this matter on the

record during those proceedings, a few outstanding

issues remain to be addressed in these post-hearing

comments.

Environmental

Impact and Alternatives

At the first hearing

in this proceeding, a question was raised by Albert Ettinger

regarding whether the new ammonia water quality standard proposed by IAWA would

a relaxation of the current standard

in all

circumstances.

Specifically,

Mr. Ettinger

asked Mr. Sheehan:

“Is there anywhere in this proposal

in terms of the formulas that

come out of this proposal in which you would actually wind up with a stricter ammonia

standard

under the proposed rule than under the existing rules?”

Transcript of

Chicago hearing at 135.

Mr. Sheehan

did not know the answer to this question.

The

Illinois

EPA has looked at that question and provided a Table for the Board which

demonstrates those pH and temperature values that would result

in less stringent water

quality standards

under the proposal and those pH

and temperature values that would

result in stricter water quality standards

under the proposal.

See Exhibit A.

Although

for most common pH and temperature values, the equations result in

higher water

quality standard values under the proposal; for those values above the

dark line

Exhibit A, the new standard would result in

stricter water quality standard values.

At the Chicago hearing, testimony was presented from by David Zenz of Consoer

Townsend Envirodyne

Engineers,

Inc. regarding

a conversation

between

Mr. Zenz,

Mike Zima of DeKaIb Sanitary District and Al Keller of the

Illinois EPA regarding the

use

of breakpoint chlorination as an alternative treatment technology for ammonia nitrogen.

(Transcript at p.

80-81).

IAWA testified that during that conference call with Al Keller, he

indicated that the

Illinois

EPA would not accept use of the breakpoint chlorination

alternative for treating ammonia.

IAWA also testified that Al Keller would be sending a

letter to that effect to them.

The hearing officer requested that a copy of the

letter from

the Illinois

EPA to DeKaIb Sanitary District confirming the

Illinois EPA’s position on use

of that technology be submitted into the

record ofthis proceeding.

A letter such as that

described by IAWA was sent by the

Illinois

EPA to Mr. Zenz on March 26,

2002.

A copy

of that letter has been attached to these post-hearing comments as Exhibit B.

Submittal of Typical pH data

At the Springfield hearing, Anand Rao of the Board’s technical staff requested

that the

Illinois

EPA submit a general range oftypical pH values for some major Illinois

streams.

Attached to these comments as Exhibit C are the

pH data for six Illinois

streams covering the period January

1997 to December 2001.

The Exhibit also

provides the high, average,

low,

50th

percentile, 75~”

percentile and standard deviation

of the

pH values for this time period.

Implementation Issues

At both the first and second hearings the Board

raised concerns about whether

the proposal adequately established a sub-chronic water quality standard that would

address what the Board termed the

“highest four day average within the thirty

day

period” concept of the

National Criteria Document.

Transcript of Springfield hearing at

32.

IAWA made changes to its initial proposal in an attempt to address

this

issue.

The

Illinois

EPA supports the changes proposed by IAWA as the best way to ensure that the

National Criteria Document’s intent to establish distinct four day and thirty day chronic

toxicity standards

is implemented.

In addition, this language establishes water quality

standards whose attainment can be assessed with

the available or obtainable

monitoring data.

At both hearings the

Board questioned whether there was a need for an effluent

limit on ammonia dischargers under Part 304 of the

Board’s rules and whether Section

355.203(a) of the Agency’s existing procedural rules

represents an effluent limit that

should

be placed

in Part 304.

At the first and second hearings, the

Illinois

EPA

explained that Section 355.203(a)

is not expected to change following amendments to

the water quality standard proposed

in this rulemaking docket; that it is intended as a

procedure for setting water quality based permit limits that contain an adequate safety

factor to prevent violations of the

Board’s water quality standards for ammonia;

that this

provision

is not

intended to function as either a water quality standard or technology

based effluent limit; and that this provision

was adopted after extensive negotiations

between

Region V of the

United States Environmental

Protection Agency,

environmental groups and the

regulated community.

Though the

Board

is free to

develop an administrative

record for establishment of a technology based effluent limit

applicable to all

ammonia dischargers, the

Illinois EPA does

not believe

such a

provision

a necessary component of this rulemaking docket.

Conclusion

The Illinois

EPA thanks the Board for the opportunity to participate in this

rulemaking proceeding and encourages the

Board to proceed expeditiously towards the

adoption of a first notice opinion and order revising the ammonia nitrogen water quality

standards.

Respectfully submitted,

Deborah J. Williams

Assistant Counsel

Division of Legal Counsel

Dated:

May

15,

2002

Illinois Environmental Protection Agency

1021

North Grand Avenue

East

P.O. Box 19276

Springfield,

Illinois 62794-9276

Exhibit A

ILLINOIS

ENVIRONMENTAL

PROTECTION

AGENCY

1021

NORTH GRAND AVENUE

EAST,

P.O.

Box 19276,

SPRINGFIELD.

ILUNOIS

62794-9276

RENEE

CIPRIANO,

DIRECTOR

March

26,

2002

David

Zenz, Ph.D.,

P.E.

Senior Associate

CTE Engineers

300

East Wacker Drive

Suite 600

Chicago,

IL 60601-5276

Re:

DeKalb Sanitary District Ammonia Reduction Using Breakpoint Chlorination

Dear Mr.

Zenz:

The Agency received your letter dated January

28, 2002 concerning

a requestto use breakpoint chlorination

at DeKa~bSanitary District’s sewage treatment plant (STP).

As discussed by

phone

March

19, 2002,

the

Agency will

not approve the proposed use of breakpoint chlorination

to reduce ammonia from

the wastewater

treatment

plant effluent.

As we discussed

the teleconference

the Agency’s main

concern was with the

formation

of chlorinated organic compounds.

We also discussed the existing STP flows, the STP schematic,

the

use of only one year of flow data and future STP expansion.

The Agency believes biological treatment

is the best solution for removing ammonia in effluents.

The Agency

appreciates

your correspondence and will

continue

work with

DeKaib

Sanitary

District to

address the compliance schedule in their NPDES Permit requiring them to meet the stated ammonia limits

December2003.

Should you have any questions or comments regarding the above, please contact Gary Bingenheimer at the

indicated

telephone number and address.

Since

ly,

Thomas G. McSwiggin,

P.E.

Manager,

Permit Section

Division

of Water Pollution Control

TGM:GWB:l:\users\epal

1 75\Ietters\dekalb

cc:

Records Unit

Rockford FOS

Michael Zima

DeKaIb Sanitary District

GEORGE

RYAN,

GOVERNOR

217/782-0610

PRINTED ON

RECYCLED

PAPER

Exhibit

To the right and

below the darkened line, the new WQS is less restrictive.

Winter (Chronic)

6.9

7.0

7.1

7.2

7.3

7.4

7.5

7.6

7.7

7.8

7.9

8.0

8.1

8.2

8.3

8.4

8.5

Temp\pH

4.0

5.0

6.0

7.0

8.0

9.0

10.0

Temp\pH

25.9

20.6

16.3

13.0

10.3

8.2

6.5

5.2

4.1

3.3

2.6

2.1

1.7

1.3

1.1

0.8

0.7

23.9

19.0

15.1

12.0

9.5

7.6

6.0

4.8

3.8

3.0

2.4

1.9

1.5

1.2

1.0

0.8

0.6

22.0

17.5

13.9

11.0

8.8

7.0

5.5

4.4

3.5

2.8

2.2

1.8

1.4

1.1

0.9

0.7

0.6

20.3

16.1

12.8

IO.2

8.1

6.4

5.1

4.1

3.2

2.6

2.1

1.6

1.3

1.0

0.8

0.7

0.5

18.8

14.9

11.8

9.4

7.5

5.9

4.7

3.8

3.0

2.4

1.9

1.5

1.2

1.0

0.8

0.6

0.5

17.3

13.8

10.9

8.7

6.9

5.5

4.4

3.5

2.8

2.2

1.8

1.4

1.1

0.9

0.7

0.6

0.5

16.0

12.7

10.1

8.0

6.4

5.1

4.0

3.2

2.6

2.0

1.6

1.3

1.0

0.8

0.7

0.5

0.4

Winter

(Acute)

6.9

7.0

7.1

7.2

7.3

7.4

7.5

7.6

7.7

7.8

7.9

8.0

8.1

8.2

8.3

8.4

8.5

145.0

115.2

91.5

72.7

57.8

45.9

36.5

29.0

23.1

18.4

14.6

11.6

9.3

7.4

5.9

4.7

3.8

133.7

106.2

84.4

67.1

53.3

42.4

33.7

26.8

21.3

16.9

13.5

10.7

8.6

6.8

5.5

4.4

3.5

123.3

98.0

77.8

61.9

49.2

39.1

31.1

24.7

19.7

15.6

12.5

9.9

7.9

6.3

5.0

4.0

3.2

113.8

90.4

71.8

57.1

45.4

36.1

28.7

22.8

18.1

14.4

11.5

9.2

7.3

5.8

4.7

3.7

3.0

105.1

83.5

66.3

52.7

41.9

33.3

26.5

21.1

16.8

13.3

10.6

8.5

6.8

5.4

4~3

3.5

2.8

97.1

77.1

61.3

48.7

38.7

30.8

24.5

19.5

15.5

12.3

9.8

7.8

6.3

5.0

4.0

3.2

2.6

89.7

71.3

56.7

45.0

35.8

28.5

22.6

18.0

14.3

11.4

9.1

7.3

5.8

4.6

3.7

3.0

2.4

Summer (Chronic)

6.9

7.0

7.1

7.2

7.3

7.4

7.5

7.6

7.7

7.8

7.9

8.0

8.1

8.2

8.3

8.4

8.5

19.9

15.8

12.6

10.0

7.9

6.3

5.0

4.0

3.2

2.6

2.0

1.6

1.3

1.1

0.8

0.7

0.6

18.5

14.7

11.7

9.3

7.4

5.9

4.7

3.7

3.0

2.4

1.9

1.5

1.2

1.0

0.8

0.6

0.5

17.2

13.6

10.8

8.6

6.9

5.5

4.4

3.5

2.8

2.2

1.8

1.4

1.1

0.9

0.7

0.6

0.5

16.0

12.7

10.1

8.0

6.4

5.1

4.1

3.2

2.6

2.1

1.6

1.3

1.1

0.9

0.7

0.6

0.5

14.8

11.8

9.4

7.5

5.9

4.7

3.8

3.0

2.4

1.9

1.5

1.2

1.0

0.8

0.6

0.5

0.4

13.8

11.0

8.7

7.0

5.5

4.4

3.5

2.8

2.2

1.8

1.4

1.2

0.9

0.7

0.6

0.5

0.4

12.9

10.2

8.1

6.5

5.2

4.1

3.3

2.6

2.1

1.7

1.3

1.1

0.9

0.7

0.6

0.5

0.4

12.0

9.5

7.6

6.0

4.8

3.8

3.1

2.4

1.9

1.6

1.3

1.0

0.8

0.7

0.5

0.4

11.2

8.9

7.1

5.6

4.5

3.6

2.9

2.3

1.8

1.5

1.2

0.9

0.8

0.6

0.5

0.4

0.3

10.4

9.7

8.3

7.7

6.6

6.2

5.3

4.9

4.2

3.9

3.3

3.1

2.7

2.1

2.5

2.0

1.7

1.6

1.4

1.3

1.1

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

Summer

(Acute)

6.9

7.0

7.1

7.2

7.3

7.4

7.5

7.6

7.7

7.8

7.9

8.0

8.1

8.2

8.3

8.4

8.5

115.1

91.5

72.7

57.8

46.0

36.6

29.2

23.2

18.5

14.8

11.8

9.4

7.6

6.1

4.9

4.0

3.2

106.9

85.0

67.6

53.7

42.8

34.0

27.1

21.6

17.2

13.7

11.0

8.8

7.1

5.7

4.6

3.7

3.0

99.4

79.0

62.8

50.0

39.8

31.6

25.2

20.1

16.0

12.8

10.2

8.2

6.6

5.3

4.3

3.5

2.8

92.4

73.5

58.4

46.5

37.0

29.4

23.5

18.7

14.9

11.9

9.5

7.6

6.1

4.9

4.0

3.2

2.6

86.0

68.4

54.4

43.3

34.4

27.4

21.8

17.4

13.9

11.1

8.9

7.1

5.7

4.6

3.7

3.0

2.5

80.0

63.6

50.6

40.3

32.1

25.5

20.3

16.2

13.0

10.4

8.3

6.7

5.4

4.3

3.5

2.9

2.3

74.5

59.3

47.1

37.5

29.9

23.8

19.0

15.1

12.1

9.7

7.8

6.2

5.0

4.0

3.3

2.7

2.2

69.5

55.2

43.9

35.0

27.8

22.2

17.7

14.1

11.3

9.0

7.2

5.8

4.7

3.8

3.1

2.5

2.1

64.7

51.5

41.0

32.6

26.0

20.7

16.5

13.2

10.5

8.4

6.8

5.4

4.4

3.6

2.9

2.4

1.9

60,4

48.0

38.2

30.4

24.2

19.3

15.4

12.3

9.8

7.9

6.3

5.1

4.1

3.3

2.7

2.2

1.8

56.4

44.8

35.7

28.4

22.6

18.0

14.4

11.5

9.2

7.4

5.9

4.8

3.9

3.1

2.6

2.1

1.7

To the left

and above

the dardkened line, the new WQS is more restrictive.

Exhibit

Result

Sample Date

Value

High

Average

Low

D-23, ILLINOIS RIVER AT MARSEILLES,

03/11/97

7.59

04/15/97

7.67

05/19/97

7.90

07/14/97

8.06

09/08/97

8.06

11/04/97

7.55

12/16/97

7.72

01/29/98

7.75

03/12/98

7.64

04/07/98

7.64

05/04/98

7.74

06/22/98

7.75

07/20/98

8.50

09/21/98

7.64

11/17/98

7.64

12/15/98

7.74

04/26/99

7.15

05/24/99

7.43

06/28/99

7.65

08/25/99

7.83

09/27/99

7.80

12/07/99

7.29

03/13/00

7.82

04/24/00

7.40

05/22/00

7.31

06/29/00

7.72

08/08/00

8.19

03/14/01

7.96

04/10/01

8.10

04/30/01

7.34

05/23/01

7.91

06/28/01

8.36

07/26/01

7.63

09/06/01

8.16

10/18/01

7.44

8.50

7.75

7.15

50th Percentile

Median

Standard

75th Percentile

Deviation

7.72

7.91

0.30

Sample Date

Value

High

Average

Low

Median

DT-09,

FOX RIVER AT SOUTH ELGIN,

01/07/97

8.17

02/18/97

8.12

03/26/97

8.55

05/28/97

8.60

07/11/97

8.54

09/04/97

8.19

11/06/97

7.73

12/17/97

8.27

02/04/98

8.07

03/17/98

8.36

04/09/98

7.78

06/01/98

8.70

07/06/98

8.98

08/10/98

8.63

09/15/98

7.64

11/12/98

8.37

11/12/98

8.37

12/07/98

8.83

12/07/98

8.83

03/18/99

8.49

04/13/99

8.43

05/27/99

8.46

06/25/99

8.23

08/24/99

7.99

08/24/99

7.99

09/21/99

8.78

09/21/99

8.78

10/21/99

8.25

10/21/99

8.25

12/02/99

8.23

12/02/99

8.23

01/05/00

8.50

02/15/00

7.84

03/16/00

8.48

04/24/00

8.34

04/24/00

8.34

06/05/00

7.88

06/12/00

8.02

07/06/00

8.05

07/06/00

8.05

07/06/00

8.05

07/10/00

8.06

07/18/00

8.38

07/31/00

8.02

08/21/00

8.49

09/05/00

8.12

09/11/00

8.13

09/18/00

8.44

Result

50th Percentile

Standard

75th

Percentile

Deviation

Result

50th Percentile

Standard

Sample Date

Value

High

Average

Low

Median

75th

Percentile

Deviation

09/25/00

7.89

09/29/00

8.18

09/29/00

8.20

09/29/00

8.20

11/14/00

8.61

01/10/01

7.97

03/07/01

7.97

03/07/01

7.97

04/04/01

8.74

04/04/01

8.74

04/27/01

8.74

06/04/01

8.18

08/10/01

8.50

09/25/01

8.15

11/06/01

8.46

12/26/01

8.23

8.98

8.29

7.64

8.24

8.49

0.30115

Result

Sample Date

Value

High

Average

Low

E-26, SANGAMON RIVER AT RIVERTON, IL

01/02/97

7.90

02/11/97

7.40

03/11/97

7.90

04/28/97

7.90

07/08/97

8.00

08/25/97

7.80

09/16/97

7.80

10/07/97

8.00

11/06/97

7.50

12/29/97

8.20

02/18/98

7.90

03/24/98

7.30

05/05/98

7.90

06/02/98

7.70

08/11/98

7.71

09/09/98

8.30

10/28/98

7.80

12/02/98

7.60

01/27/99

7.50

03/01/99

7.30

04/06/99

7.80

05/13/99

7.60

06/14/99

7.30

08/09/99

8.21

09/14/99

7.70

10/28/99

7.60

11/29/99

7.96

12/27/99

8.17

02/07/00

8.35

03/23/00

8.04

05/25/00

7.90

08/14/00

8.51

09/11/00

7.84

10/11/00

6.96

12/11/00

8.21

01/11/01

7.59

02/26/01

7.32

03/27/01

8.02

04/24/01

7.59

05/23/01

7.70

07/18/01

7.93

08/09/01

8.26

10/22/01

7.80

11/26/01

7.67

8.51

7.81

6.96

50th Percentile

Median

Standard

75th

Percentile

Deviation

7.80

8.00

0.32275

Result

Sample Date

Value

High

Average

Low

G-22, DES

PLAINES RIVER

NEAR DES PLAINES, IL

01/27/97

7.45

03/05/97

7.93

04/29/97

8.16

06/02/97

8.09

06/17/97

7.82

08/14/97

7.90

09/30/97

7.91

11/05/97

7.97

12/08/97

7.88

02/03/98

7.75

03/03/98

7.91

04/15/98

7.88

05/29/98

7.92

06/22/98

7.97

08/05/98

7.81

10/28/98

7.69

12/01/98

6.54

03/05/99

8.00

04/01/99

8.04

05/18/99

7.73

06/22/99

7.72

08/26/99

7.53

09/30/99

7.67

11/03/99

7.67

12/16/99

7.72

02/09/00

7.82

03/01/00

7.58

04/13/00

8.31

05/18/00

7.58

07/11/00

7.59

08/10/00

8.00

09/28/00

7.92

03/19/01

7.85

04/05/01

7.96

05/02/01

7.87

06/05/01

7.77

07/25/01

7.59

09/13/01

8.01

11/08/01

7.57

50th Percentile

Median

Standard

75th Percentile

Deviation

12/19/01

7.44

8.31

7.79

6.54

7.84

7.94

0.27973

Result

Sample Date

Value

High

Average

Low

N-li,

BIG MUDDY RIVER AT PLUMFIELD, IL

02/05/97

6.60

03/05/97

7.00

04/02/97

7.30

05/20/97

7.20

06/10/97

7.20

07/17/97

7.40

08/21/97

7.40

10/22/97

7.70

12/03/97

7.40

02/02/98

7.60

03/04/98

7.90

04/22/98

7.10

05/21/98

7.30

06/18/98

7.10

07/22/98

6.70

09/02/98

7.80

10/14/98

6.90

11/24/98

7.10

01/06/99

7.20

02/09/99

7.10

03/23/99

7.60

05/19/99

7.00

07/07/99

6.60

08/16/99

7.00

09/14/99

7.10

10/26/99

7.30

12/07/99

7.00

01/04/00

6.70

02/16/00

6.80

05/25/00

6.90

06/20/00

6.80

07/19/00

6.80

09/06/00

6.50

10/11/00

6.80

12/07/00

7.10

01/11/01

7.20

02/07/01

7.30

03/20/01

7.20

05/01/01

7.10

05/31/01

7.10

07/16/01

6.90

08/20/01

6.90

10/17/01

6.70

12/05/01

6.30

7.90

7.08

6.30

50th Percentile

Median

Standard

75th

Percentile

Deviation

7.10

7.30

0.34096

Result

Sample Date

Value

High

Average

Low

P-06, ROCK RIVER AT COMa, IL

01/08/97

8.18

03/04/97

7.79

04/22/97

8.80

05/21/97

8.74

07/07/97

8.42

08/06/97

8.43

09/23/97

8.42

11/18/97

9.00

01/07/98

8.10

02/05/98

8.30

03/1 8/98

8.50

04/13/98

8.09

05/19/98

8.30

06/30/98

7.94

07/28/98

8.69

08/18/98

8.67

09/22/98

8.18

11/18/98

8.19

12/16/98

8.39

02/04/99

7.91

03/16/99

8.59

04/12/99

8.02

06/07/99

8.09

07/06/99

8.47

08/10/99

8.47

09/21/99

8.39

10/18/99

8.65

11/16/99

8.09

01/25/00

7.50

02/24/00

7.74

04/03/00

8.58

05/09/00

8.24

06/14/00

7.59

08/01/00

8.85

09/06/00

8.52

11/21/00

8.19

02/06/01

7.24

03/28/01

8.34

04/18/01

8.40

05/22/01

8.22

08/07/01

8.27

11/28/01

8.18

9.00

8.28

7.24

50th Percentile

Median

Standard

75th Percentile

Deviation

8.30

8.49

0.36497

)

STATE OF ILLINOIS

)

COUNTY OF SANGAMON

)

PROOF OF SERVICE

the undersigned, on oath state that I have

served

the

attached

POST-HEARING COMMENTS of

the Illinois Environmental Protection Agency upon the person to whom it is directed, by placing a copy in

an envelope addressed to:

Please see attached service list.

and mailing

it from Springfield, Illinois on

May

15, 2002 with sufficient postage affixed

as indicated

above.

~7o~

SUBSCRIBED AND SWORN

BEFORE ME

this

15thi

day ofMay

2002

~)m\L

Notary Public

OFFICIAL

SEAL

BRENDA BOEHNEP

NOTARY

PUBLIC,

STATE

IlLINOIS

~MY

COMMISSION

EXPIRES

~-i4-2005~

THIS

FILING

IS SUBMITTED ON RECYCLED PAPER

SERVICE LIST

R02-19

May

15,

2002

Dorothy Gum, Clerk

Illinois PollutionControl Board

100 West Randolph,

Suite 11-500

Chicago, Illinois

60601

Catherine Glenn

Illinois Pollution Control Board

100

West Randolph, Suite

11-500

Chicago, Illinois

60601

Tim

Bachman

Urbana/Champaign Sanitary District

1100 East University Avenue Post Office Box 669

Urbana, Illinois

61803

Mike Callahan

Bloomington Normal

Water Reclamation District

Post Office Box 3307

Bloomington, Illinois

61702-3307

Larry Cox

Downer’s Grove Sanitary District

2710 Curtiss Street

Downer’s Grove, Illinois

60515

Dennis

Daffield

Department ofPublic Works City of Joliet

921

East Washington Street

Joliet, Illinois

60433

Jim Daugherty

Thorn CreekBasin Sanitary District

700

West End Avenue

Chicago Heights, Illinois

60417

Sheila Deely

Gamder, Carton and Douglas

321 North Clark Street, Suite 3400

Chicago, Illinois

60610-4795

Albert Ettinger

Environmental Law and Policy Center

East Wacker Drive,

Suite 1300

Chicago, Illinois

60601-2110

Susan M. Franzetti

Sonnenschein Nath and Rosenthal

8000

Sears Tower

233

South Wacker Drive

Chicago, Illinois

60606

Lisa Frede

Chemical Industiy Council

9801

West Higgins Road, Suite 515

Rosemont, Illinois

60018

James T. Harrington

Ross and Hardies

150

North Michigan, Suite 2500

Chicago, Illinois

60601

Katherine Hodge

Hodge, Dwyer Zeman

3150 Roland Avenue

Post Office Box 5776

Springfield, Illinois

62705-5776

Margaret Howard

Hedinger and Howard

1225

South Sixth Street

Springfield, Illinois

62703

Richard Lanyon

Metropolitan Water Reclamation District

100 East Erie, Room 400

Chicago, Illinois

60611

Robert Messina

Illinois

Environmental Regulatory Group

215 East Adams Street

Springfield, Illinois

62701

Tom Mulh

Fox Metro Walter Reclamation District

682 State Route 31

Oswego, Illinois

60543

Irwin Polls

Metropolitan Water Reclamation

District of Chicago

Environmental Monitoring Division

6001 West Pershing Road

Cicero, Illinois

60804-4112

David Zenz

CTE Engineers

303 East Wacker Drive, Suite 600

Chicago, Illinois

60601

Michael Zima

DeKalb Sanitary District

Post Office Box 624

DeKalb, Illinois

60115

THIS

FILING

IS SUBMITTED ON RECYCLED PAPER