BEFORE THE ILLINOIS POLLUTION CONTROL BOARD

IN THE MATTER OF:

WATER QUALITY STANDARDS AND

EFFLUENT LIMITATIONS FOR THE

CHICAGO AREA WATERWAY SYSTEM

AND THE LOWER DES PLAINES RIVER:

PROPOSED AMENDMENTS TO 35 Ill.

Adm. Code Parts 301, 302, 303 and 304

R08.9

(Rulemaking - Water)

PRE-FILED TESTIMONY OF SAMUEL G. DENNISON ON BEHALF OF THE

METROPOLITAN WATER RECLAMATION DISTRICT OF GREATER CHICAGO

CONCERNING

DISSOLVED

OXYGEN (DO) STANDARDS

PROPOSED FOR

PROTECTING AQUATIC LIFE IN THE DESIGNATED AQUATIC LIFE USE A

WATERS AND AQUATIC LIFE USE B WATERS

OF THE

CHICAGO AREA

WATERWAY SYSTEM

My name is Samuel G. Dennison.

I am a Biologist

IV in the Environmental Monitoring

and Research Division of the Research and Development Department of the Metropolitan Water

Reclamation District of Greater Chicago (District). I received a Bachelor of Arts degree with a

major in Biology from Saint Mary's University in Winona, Minnesota, a Master of

Science

degree in

Fisheries Biology from Iowa State University in Ames, Iowa, and a Doctor of

Philosophy degree in Biology from the Illinois

Institute

of Technology in Chicago,

Illinois. I airy

a Certified Fisheries Professional with the American Fisheries Society and

also a

Past President

of the Illinois Chapter of the American Fisheries Society.

I

have been employed

by

the District

since

1971.

My primary responsibility from 1974

through 2003 was monitoring the fish populations in Chicago

area

waterways.

Since 2003, I

have served as Head of the Aquatic Ecology and Water Quality Section within the

Environmental Monitoring and Research Division, where I supervise a staff of ten persons. As

Section Head I have had the responsibility of continuing the District's Continuous Dissolved

Oxygen Monitoring Program that was

initiated

in August 1998.

---

My testimony today will discuss the District's continuous DO monitoring program and

demonstrate that the various waters in the Chicago Area Waterway System do not always meet

the proposed DO standards.

Over the years, increased pollutant loading from urbanization throughout the Chicago

metropolitan area and low stream velocities in Chicago area deep-draft waterways have caused

dissolved oxygen (DO) concentrations to fall below DO standards established by the Illinois

Pollution Control Board (IPCB).

More than 30 years ago, the Metropolitan Water Reclamation

District of Greater Chicago (District) determined that applicable IPCB DO standards for Chicago

area waterways could not be met exclusively by advanced wastewater treatment at its three major

regional

water reclamation plants (WRPs), Calumet, North Side, and Stickney, and by the

capture and treatment of combined sewer overflows (CSOs). In order to increase the DO

concentration in the Chicago and Calumet River Systems, the District designed and constructed

artificial

aeration systems (instream diffuser and sidestream elevated pool aeration [SEPA]

stations) during the late 1970s and early 1990s, respectively.

Currently there are 19 continuous DO monitoring stations in the deep-draft waterways of

the Chicago River System, Des Plaines River System, and Calumet River. These monitoring

stations are shown in Figure I of Attachment 1.

The continuous water quality monitors used to collect these data were manufactured by

YSI Incorporated (YSI) of Yellow Springs, Ohio.

DO was measured hourly using the YSI

Model 6920 or Model 6600 monitor. In order to protect and safeguard the monitors from marine

navigation and vandalism, the monitors were deployed in the field in stainless steel pipes. Two

different installation designs were employed: (1) a 3-foot length of 8-inch diameter stainless steel

pipe secured to shore by means of a chain, was positioned on the bottom of the waterway and

2

---

oriented downstream such that the water passed through the pipe, and (2) a fixed length of 8-inch

diameter stainless steel pipe, with multiple 2-inch circular openings, was vertically mounted on

the side of a bridge abutment.

Servicing the monitors followed a weekly schedule.

District Industrial

Waste Division

personnel retrieved each monitor from the field following seven days of continuous monitoring.

Prior to retrieval, a water sample for chemical DO analysis using the Winkler titration method

was collected next to the protective housing.

An additional monitor, that had been previously

calibrated and serviced in the laboratory, was then deployed to replace the retrieved monitor.

The retrieved monitors were returned to the laboratory for data downloading, exterior cleaning,

servicing, and calibration of the DO sensors. The monitors were temporarily stored in holding

tanks containing tap water for subsequent deployment during the following week.

Hourly DO data were directly exported electronically from individual monitors to a

specially designed

Microsoft Access computer database for data processing and storage.

Following data downloading, the weekly DO data were carefully reviewed for accuracy. using a

method outlined in ATTACHMENT 1. After careful review of the DO data, weekly summary

statistics (mean,

minimum, maximum, and percent observations above DO standard) and

individual line drawings for each monitoring station showing hourly DO concentrations were

prepared. (Program description from Polls, 2002).

Results from the Continuous Dissolved Oxygen Monitoring Program show that man

waterways in the CAWS do not comply with the DO standards proposed b IEPA. Table 1 in

ATTACHMENT 2 was generated comparing District DO data from January, 2005 through

December, 2007 to the proposed Aquatic Life Use A DO standard. Continuous DO monitors at

six stations throughout the Calumet River System indicated limited compliance with the 5.0

3

---

mg/L proposed seasonal standard.

Continuous DO monitors at Route 83 on the Calumet-Sag

Channel show that the annual compliance with the 5.0 mg/L seasonal standard would have been

as low as 63.8 percent in 2005.

At Torrence Avenue on the Grand Calumet River, annual

compliance with the proposed 5.0 mg/L DO standard would have ranged between 47.7-62.0

percent between 2005-2007.

In the North Branch of the Chicago River at Fullerton Avenue, compliance with the

Aquatic Life Use A seasonal DO standard of 5.0 mg/L would have only been 65 percent during

2005, which was a very dry year.

Table 2 in ATTACHMENT 2 indicates annual compliance with the proposed 7-day mean

of daily minima DO standard of 4.0 mg/L was as low as 17.3 percent at 36th Street in Bubbly

Creek during 2006. Annual compliance with this proposed DO standard in the Chicago Sanitary

and Ship Canal ranged from 73.0-87.2 percent at Cicero Avenue, and 68.0-72.3 percent at

Lockport powerhouse during 2005-2007.

During wet weather, the DO in the waterways can be severely impacted and elicit DO

concentrations of less than 3 mg/L.

ATTACHMENT 3 shows DO at various stations in the

Chicago Area Waterway System during an example rain event in August, 2006. The effect on

DO in the CAWS from combined sewer overflows and especially District pumping stations can

last for days following a storm event. Comparing the DO graphs in ATTACHMENT 3 helps to

illustrate that CSOs do not impact all of the CAWS at the same time or in the same manner

following rain events.

This may explain why there are not frequent fish kills throughout the

system, since fish are likely to practice avoidance of the low DO segments.

With the severe aquatic habitat limitations of the Chicago Area Waterway System,

requiring an enhanced seasonal 5.0 mg/L minimum DO standard in the Chicago Area Waterway

---

System will merely increase the District's energy consumption and involve construction of many

additional aeration systems without substantially increasing the likelihood that fish populations

will become any more self sustaining than they are now.

5

---

Respectfully

submitted,

By:

Samuel G. Dennison

---

Testimony Attachments

1.

R&D Report No. 07-25. 2007 DO report

2.

Summary Compliance with proposed DO Standard

3.

Wet weather DO recovery graphs for the CAWS

References

Polls, Irwin. 2002. Continuous Dissolved Oxygen Monitoring from Wilmette to Lockport in the

Chicago Waterway System During August 1998 through July 2000. District R&D Report No.

02-11.

6

---

A

tt

a

chm

e

nt 1

---

etr

D putt

Water-

Reclamation

District of Greater

RESEARCH AND

DEVELOPMENT

DEPARTMENT

REPORT NO. 07-25

CONTINUOUS DISSOLVED OXYGEN MONITORING

IN THE DEEP-DRAFT CHICAGO WATERWAY SYSTEM

DURING 2006

May 2007

---

Metropolitan Water Reclamation District of Greater Chicago

100 East Erie Street Chicago, Illinois 60611-2803 312-751-5600

CONTINUOUS DISSOLVED OXYGEN MONITORING

IN THE DEEP-DRAFT CHICAGO WATERWAY SYSTEM

DURING 2006

By

Thomas A. Minarik, Jr.

Biologist I

Jennifer L. Wasik

Biologist II

Michael Sopcak

Biologist III

Samuel G. Dennison

Biologist IV

Research and Development

Department

Louis

Kollias,

Director

May 2007

---

TABLE OF CONTENTS

PPae

LIST OF TABLES

ii

LIST OF FIGURES

iv

ACKNOWLEDGEMENT

vi

DISCLAIMER

vi

INTRODUCTION

I

MONITORING STATIONS

2

Locations

and Descriptions

2

Designated Uses

2

Water Quality

Standards

2

MATERIALS AND METHODS

3

Water Quality

Monitor

3

Data Management and Review

3

Verification of Representative Data

4

RESULTS

5

DO Fluctuations

5

REFERENCES

35

APPENDIX:

A

Weekly DO Summary

Statistics at all Deep-Draft Monitoring

Stations

A-1

During 2006

i

---

LIST OF TABLES

Table

No.

Page

1

Deep-Draft Continuous Dissolved Oxygen Monitoring Stations

6

2

Minimum, Maximum, and Mean Hourly Dissolved Oxygen Concentra-

tions

10

3

Number and Percent of Dissolved Oxygen Values Not Meeting Accep-

tance Criteria

11

4

Number and Percent of Dissolved Oxygen Values Measured Above the

Illinois Pollution Control Board's Water Quality Standard

12

5

Percent of Dissolved Oxygen Values in Selected Ranges

13

A-1

Weekly DO Summary Statistics at Main Street on the North Shore Chan-

nel During 2006

A-1

A-2

Weekly DO Summary Statistics at Foster Avenue on the North Shore

Channel During 2006

A-3

A-3

Weekly DO Summary Statistics at Addison Street on the North Branch of

the Chicago River During 2006

A-5

A-4

Weekly DO Summary Statistics at Fullerton Avenue on the North Branch

of the Chicago River During 2006

A-7

A-5

Weekly DO Summary Statistics at Kinzie Street on the North Branch of

the Chicago River During 2006

A-9

A-6

Weekly DO Summary Statistics at Clark Street on the Chicago River

During 2006

A-11

A-7

Weekly DO Summary Statistics at Loomis Street on the South Branch of

the Chicago River During 2006

A-13

A-8

Weekly DO Summary Statistics at 36th Street on Bubbly Creek During

A-15

2006

A-9

Weekly DO Summary Statistics at Interstate Highway 55 on Bubbly

Creek During 2006

A-17

ii

---

LIST OF TABLES (

Continued)

Table

No,

Page

A-10

Weekly DO Summary Statistics at Cicero Avenue on the Chicago Sani-

tary and Ship Canal During 2006

A-19

A-11

Weekly DO Summary Statistics at B&O Central Railroad on the Chicago

Sanitary and Ship Canal During 2006

A-21

A-12

Weekly DO Summary Statistics at Route 83 on the Chicago Sanitary and

Ship Canal During 2006

A-23

A-13

Weekly DO Summary Statistics at the Lockport Powerhouse on the Chi-

cago Sanitary and Ship Canal During 2006

A-25

A-14

Weekly DO Summary Statistics at Jefferson Street on the Des Plaines

River During 2006

A-27

A-15

Weekly DO Summary Statistics at Torrence Avenue on the Grand Calu-

met River During 2006

A-29

A-16

Weekly DO Summary Statistics at C&W Indiana Railroad on the Little

Calumet River During 2006

A-31

A-17

Weekly DO Summary Statistics at Halsted Street on the Little Calumet

River During 2006

A-33

A-18

Weekly DO Summary Statistics at Cicero Avenue on the Calumet-Sag

Charnel During 2006

A-35

A-19

Weekly DO Summary Statistics at 104th Avenue on the Calumet-Sag

Channel During 2006

A-37

A-20

Weekly DO Summary Statistics at Route 83 on the Calumet-Sag Channel

During 2006

A-39

iii

---

LIST OF FIGURES

Figure

No.

Page

1

Continuous Dissolved

Oxygen

Monitoring and Ambient

Water Quality

14

Monitoring Sample Stations

2

Dissolved Oxygen Concentration Measured Hourly at Main Street on the

15

North Shore Channel From January 2006 Through December 2006

3

Dissolved Oxygen Concentration Measured Hourly at Foster Avenue on

16

the North Shore Channel From January 2006 Through December 2006

4

Dissolved Oxygen Concentration Measured Hourly at Addison Street on

17

the North Branch Chicago River From January 2006 Through December

2006

5

Dissolved Oxygen Concentration Measured Hourly at Fullerton Avenue

18

on the North Branch Chicago River From January 2006 Through Decem-

ber 2006

6

Dissolved Oxygen Concentration Measured Hourly at Kinzie Street on

19

the North Branch Chicago River From January 2006 Through December

2006

7

Dissolved Oxygen Concentration Measured Hourly at Clark Street on the

20

Chicago River From January 2006 Through December 2006

8

Dissolved Oxygen Concentration Measured Hourly at Loomis Street on

21

the South Branch Chicago River From January 2006 Through December

2006

9

Dissolved Oxygen Concentration Measured Hourly at 36th Street on

22

Bubbly Creek From January 2006 Through December 2006

10

Dissolved Oxygen Concentration Measured Hourly at Interstate Highway

23

55 on Bubbly Creek From January 2006 Through December 2006

11

Dissolved Oxygen Concentration Measured Hourly at Cicero Avenue on

24

the Chicago Sanitary and Ship Canal From January 2006 Through De-

cember 2006

iv

---

LIST OF FIGURES (

Continued)

Figure

No.

Page

12

Dissolved Oxygen Concentration Measured Hourly at B&O Central

25

Railroad on the Chicago Sanitary and Ship Canal From January 2006

Through December 2006

13

Dissolved Oxygen Concentration Measured Hourly at Route 83 on the

26

Chicago Sanitary and Ship Canal From January 2006 Through De-

cember 2006

14

Dissolved Oxygen Concentration Measured Hourly at Lockport Pow-

27

erhouse on the Chicago Sanitary and Ship Canal From January 2006

Through December 2006

15

Dissolved Oxygen Concentration Measured Hourly at Jefferson Street

28

on the Des Plaines River From January 2006 Through December 2006

16

Dissolved Oxygen Concentration Measured Hourly at Torrence Ave-

29

nue on the Grand Calumet River From January 2006 Through Decem-

ber 2006

17

Dissolved Oxygen Concentration Measured Hourly at C&W.Indiana

30

Railroad on the Little Calumet River From January 2006 Through De-

cember 2006

18

Dissolved Oxygen Concentration Measured Hourly at Halsted Street

31

on the Little Calumet River From January 2006 Through December

2006

19

Dissolved Oxygen Concentration Measured Hourly at Cicero Avenue

32

on the Calumet-Sag Channel From January 2006 Through December

2006

20

Dissolved Oxygen Concentration Measured Hourly at 104th Avenue

33

on the Calumet-Sag Channel From January 2006 Through December

2006

21

Dissolved Oxygen Concentration Measured Hourly at Route 83 on the

34

Calumet-Sag Channel From January 2006 Through December 2006

v

---

ACKNOWLEDGMENT

Thanks are extended to staff from the Industrial Waste Division who deployed and re-

trieved the water quality monitors weekly during the study. Special thanks to Richard Schackart,

Justin Vick, Dustin Gallagher, Donald Rohe, Angel Whitington, Panu Lansiri, and Colleen Joyce

for downloading and servicing the monitors.

Thanks are also extended to Dr. Thomas Granato, Assistant Director of Research and

Development, Environmental

Monitoring and Research Division, for his helpful review

comments.

We thank Robert Larson, Illinois State Water Survey, for designing the Access° database

program, and Roger Smith, Senior Program Analyst, Information Technology Department for

modifying the database program. Their help with the Access® program is greatly appreciated.

We thank Dr. Zainul Abedin, Biostatistician, for modifying the database program and for

performing the calculations for the data summaries used in this report.

Particular thanks are due to Joan Scrima for reviewing, formatting, and typing the report.

DISCLAUVIER

Mention of proprietary equipment

and chemicals

in this report

does not constitute

endorsement

by the Metropolitan Water

Reclamation

District of Greater Chicago.

vi

---

INTRODUCTION

The Chicago Waterway System (CWS) consists of 78 miles of canals, which serve the

Chicago area for two principal purposes, the drainage of urban storm water runoff and treated

municipal wastewater effluent and the support of commercial navigation. Approximately 75 per-

cent of the length is composed of man-made canals where no waterway existed previously, and

the remainder is composed of natural streams that have been deepened, straightened and/or wid-

ened to such an extent that reversion to the natural state is not possible. The flow of water in the

CWS is artificially controlled by hydraulic structures. The CWS has two river systems, the

Calumet River System and the Chicago River System (Lanyon, 2002).

Over the years, increased pollutant loading from urbanization throughout the Chicago

metropolitan area and low stream velocities in Chicago area deep-draft waterways have caused

dissolved oxygen (DO) concentrations to fall below DO standards established by the Illinois Pol-

lution Control Board (IPCB). More than 30 years ago, the Metropolitan Water Reclamation Dis-

trict of Greater Chicago (District) determined that applicable IPCB DO standards for Chicago

area waterways could not be met exclusively by advanced wastewater treatment at its three major

regional water reclamation plants (WRPs), Calumet, North Side, and Stickney, and by the cap-

ture and treatment of combined sewer overflows (CSOs). In order to increase the DO concentra-

tion in the Chicago and Calumet River Systems, the District designed and constructed artificial

aeration systems (instream diffuser and sidestream elevated pool aeration [SEPA] stations) dur-

ing the late 1970s and early 1990s, respectively.

From October 1994 through May 1996, the Research and Development Department

(R&D) conducted weekly DO surveys in the Chicago River System. Water samples were col-

lected manually, chemically fixed in the field, and returned to the laboratory for titration. The

results from these surveys showed that DO concentrations in selected waterway reaches were

less than IPCB DO standards applicable to these reaches.

In August 1996, R&D began developing a comprehensive field-monitoring program in

order to locate and identify reaches in the Chicago River System where the DO concentration is

less than the applicable IPCB DO standard. Initially, the program was to focus on the Chicago

River System for a two-year period and has since been extended. Subsequently, the scope of the

monitoring program was first expanded to include the Calumet River System, and then later the

Chicago area wadeable streams. The resulting data have been used for the calibration and verifi-

cation of a water quality model for the CWS.

Data in this report are from the 20 deep-draft continuous DO monitoring stations of the

District's Continuous Dissolved Oxygen Monitoring (CDOM) Program. This report covers the

monitoring results for the period January 2006 through December 2006 for the deep-draft

waterways of the Chicago River System, Des Plaines River System, and Calumet River System.

1

---

MONITORING STATIONS

Locations and Descriptions

The CDOM Program and the Ambient Water Quality Monitoring

(AWQM)

Program

supply the District with water quality data throughout the year for both the wadeable and deep-

draft waterways within its jurisdiction

.

All stations for both programs are shown in Figure 1.

Descriptions of the locations for the deep-draft monitoring stations are listed in Table 1.

Designated Uses

The IPCB has assigned water uses for specific water bodies within the state of Illinois.

All waters in Illinois are designated for General Use, except those selected as Secondary Contact

and Indigenous Aquatic Life Waters (Secondary Contact)

In the Chicago and Calumet River Systems, General Use Waters include the North Shore

Channel from Lake Michigan to the North Side WRP, and the Chicago and Calumet Rivers.

Secondary Contact Waters include the North Shore Channel from the North Side WRP to

the North Branch of the Chicago River, the North Branch of the Chicago River from the North

Shore Channel to the Chicago River, the South Branch of the Chicago River, Bubbly Creek, the

Chicago Sanitary and Ship Canal, the Grand Calumet River, the deep-draft portion of the Little

Calumet River, the Calumet-Sag Channel, and the Des Plaines River from its confluence with the

Chicago Sanitary and Ship Canal to the Interstate Highway 55 bridge southwest of Joliet.

Water

Quality Standards

The IPCB has established water quality standards for DO in both General Use and Sec-

ondary Contact Waters. In General Use Waters, the DO shall not be less than 6.0 mg/L during 16

hours of any 24-hour period, nor less than 5.0 mg/L at any time. In Secondary Contact Waters,

the DO shall not be less than 4.0 mg/L at any time, except in the Calumet-Sag Channel where the

DO shall not be less than 3.0 mg/L at any time. For this report, we have selected the 5.0 mg/L

DO standard when calculating percent compliance for General Use Waters.

2

---

MATERIALS AND METHODS

Water Quality Monitor

The continuous water quality monitors (monitor) used to collect this data were manufac-

tured by YSI Incorporated (YSI) of Yellow Springs, Ohio. DO was measured hourly using the

YSI Model 6920 or Model 6600 monitor. In order to protect and safeguard the monitors from

marine navigation and vandalism, the monitors were deployed in the field in stainless steel pipes.

Two different installation designs were employed: (1) a 3-foot stainless steel pipe was positioned

on the bottom of the waterway and oriented downstream such that the water passed through the

pipe, and (2) a fixed length of pipe, with multiple 2-inch circular openings, was vertically

mounted on the side of a bridge abutment.

Servicing the monitors followed a weekly schedule. Industrial Waste Division personnel

retrieved each monitor from the field following seven days of continuous monitoring. Prior to

retrieval, a water sample for DO analysis was collected next to the protective housing. An addi-

tional

monitor, that had been previously calibrated and serviced in the laboratory, was then de-

ployed to replace the retrieved monitor. The retrieved monitors were returned to the laboratory

for data downloading, exterior cleaning, servicing, and calibration of the DO sensors. The moni-

tors

were temporarily stored in holding tanks containing tap water for subsequent deployment

during the following week.

Data Management and Review

Hourly DO data were directly exported electronically from individual monitors to a spe-

cially designed Accesso database for data processing and storage. Following data downloading,

the weekly DO data were carefully reviewed for accuracy.

The review

process included the following:

1.

Comparing a grab sample DO concentration measured in the field with a DO

concentration recorded by a retrieved monitor (DO rejection criteria = differ-

ence greater than 2.0 mg/L).

2.

Comparing the last hourly DO concentration measured by a retrieved monitor

with the first hourly DO concentration recorded by a deployed monitor (DO

rejection criteria = difference greater than 2.0 mg/L).

3.

Comparing a DO concentration measured in a laboratory holding tank and a

DO concentration recorded by a retrieved monitor (DO rejection criteria = dif-

ference greater than 1.0 mg/ L).

Criterion 3 would entail rejection of all hourly readings; criteria 1 and 2 may or may not

reject all readings.

3

---

After careful review of the DO data, weekly summary statistics (mean, minimum, maxi-

mum, and percent observations above DO standard) and individual line drawings for each moni-

toring station showing hourly DO concentrations were prepared.

Verification

of Representative Data

During the spring, summer, and fall of 2006, cross-sectional DO surveys were conducted

in the CWS to determine if a fixed continuous monitoring location represented the DO concentra-

tion across the waterway. Verification was achieved by comparing the DO concentrations meas-

ured in grab samples at multiple fixed locations and depths across the waterway with the fixed

monitor measurements. The results from the cross-sectional surveys clearly showed that the dif-

ferences across the waterway were minimal and equivalent to the DO concentration measured by

the monitor at the fixed locations.

4

---

RESULTS

The annual minimum

,

maximum

,

and mean DO concentrations measured at all 20 sta-

tions during 2006 are shown in Table 2.

The number and percent of measured DO concentrations rejected and removed from the

Access° database following review during 2006 are summarized in Table 3.

The number and percent of DO concentrations above the applicable 1PCB DO standard

for each waterway during 2006 are presented in Table 4. The DO data shown in Table 4 do not

include the DO concentrations rejected during the data review.

Table 5 shows the percent distribution

of DO

concentrations from <1.0 mg/L to >5.0

mg/L

at the 20 monitoring stations during 2006. The current national one-day minimum DO cri-

terion for adult life stages of fish is 3.0

mg/L (

Chapman, 1986).

Individual line drawings showing hourly DO concentrations at each monitoring station

are indicated in Fi

g

ures 2 through 21.

Weekly

DO summary statistics during 2006 are presented for each monitoring station in

Appendix A, Tables A-1, through A-20.

DO Fluctuations

DO concentrations fluctuate seasonally and daily in the aquatic environment

.

Cold water

holds more DO than warm water, a trend that can typically be seen in annual DO graphs where

the colder months have higher mean DO concentrations than the warmer months. Daily fluctua-

tions in DO can be caused by photosynthesis during daylight hours causing a surplus of DO, and,

conversely

,

respiration by aquatic plants and algae during the night

,

resulting in a deficiency of

DO. Other deficiencies of DO can occur when oxygen demanding materials are introduced into

a waterway or by thermal discharges. Oxygen demanding materials enter the CWS most often

through wastewater treatment effluents

,

stormwater run-off, and CSOs.

Wastewater treatment

effluents and CSOs contain organic materials that are decomposed by microorganisms which

consume DO in the process

.

Stormwater run-off also can flush organic materials into the water-

way either directly from the land adjacent to the CWS, or indirectly through the combined sewer

system.

This is most evident during heavy rain storms that result in CSO events containing un-

treated waste and stormwater

.

The District Web site

(

mwrd.org) has information regarding CSO

events which can be found in the Public Interest Section under the titles

"

CSO Event Synopsis

Report" and

"

Combined Sewer Overflow

."

Most low DO excursions reported for the deep-draft

sections of the CWS in this report are associated with the occurrence of a CSO event during

2006.

5

---

TABLE 1: DEEP-DRAFT CONTINUOUS DISSOLVED OXYGEN

MONITORING STATIONS

Monitoring

Description of

Station

Waterway

Chicago River System

Monitoring Station

Main Street

North Shore Channel

3.5

miles below

Wilmette Pumping

Station,

0.8

mile above North Side

WRP outfall, water quality monitor

under

Main Street bridge, center of

channel, b inches above bottom.

Foster Avenue

North Shore Channel

3.2 miles below North Side WRP out-

fall, 1.5

miles below Devon Aeration

Station, 0.1

mile above junction with

North Branch Chicago River, water

quality monitor on northwest side Fos-

ter

Avenue bridge, 3 feet below water

surface.

Addison Street

North Branch Chicago River

Fullerton Avenue

North Branch Chicago River

Kinzie Street

North Branch Chicago River

5.2 miles below North Side WRP out-

fall,

water quality monitor on northwest

side Addison Street bridge, 3 feet be-

low water surface.

7.2 miles below North Side WRP out-

fall, 0.4

mile above Webster Aeration

Station,

water

quality

monitor

on

northwest

side

Fullerton

Avenue

bridge, 3 feet below water surface.

9.9 miles below North Side WRP out-

fall, 3.1

miles below Webster Aeration

Station, 0.2 mile above junction with

Chicago River, water quality monitor

on northeast side Kinzie Street bridge,

3 feet below water surface.

6

---

TABLE 1 (Continued): DEEP-DRAFT CONTINUOUS DISSOLVED OXYGEN

MONITORING STATIONS

Monitoring

Description of

Station

Waterway

Chicago River System (Continued)

Monitoring Station

Loomis Street

South Branch Chicago River

3.6 miles below junction with Chicago

River, water quality monitor on north-

east side Loomis Street bridge, 3 feet

below water surface.

36'' Street

Bubbly Creek

0.2

mile below Racine Avenue Pump-

ing Station, 1.2 miles above junction

with South Branch of the Chicago

River, water quality monitor attached to

concrete wall on west side of river, 3

feet below water surface.

Interstate Highway 55

Bubbly Creek

1.0

mile below Racine Avenue Pump-

ing Station, 0.4 mile above junction

with South Branch of the Chicago

River, water quality monitor on north-

east side I-55 bridge, 3 feet below wa-

ter surface.

Cicero Avenue

Chicago Sanitary and Ship Canal

1.5

miles above Stickney WRP outfall,

1.1

miles below Crawford Generating

Station cooling water discharge, water

quality

monitor

on northeast side

Cicero

Avenue bridge, 3 feet below

water surface.

B&O Central Railroad Chicago Sanitary and Ship Canal

3.6 miles below Stickney WRP outfall,

water quality monitor in center of ca-

nal, east side B&O Central RR bridge,

3 feet below water surface.

Route 83

Chicago Sanitary and Ship Canal

1.2 miles above junction with Calumet-

Sag Channel, 1.1 miles above Canal

Junction SEPA Station, water quality

monitor 0.6

mile above Route 83

bridge, center of canal, 6 inches above

bottom.

7

---

TABLE I (Continued): DEEP-DRAFT CONTINUOUS DISSOLVED OXYGEN

MONITORING STATIONS

Monitoring

Description of

Station

Waterway

Monitoring Station

Chicago River System (Continued)

Lockport Powerhouse

Chicago Sanitary and Ship Canal

0.1

mile above Lockport Powerhouse,

1.1

miles above junction with Des

Plaines River, water quality monitor on

north side of canal, in forebay area on

fender wall, 3 feet below water surface.

Des Plaines River System

Jefferson Street

Des Plaines River

3.0

miles below Lockport Lock, 2.1

miles below junction with Chicago

Sanitary and Ship Canal, water quality

monitor on southeast side Jefferson

Street

bridge, 3 feet below water

surface.

Calumet River System

Torrence Avenue

Grand Calumet River

150 feet above junction with Calumet

River, 100 feet below Torrence Avenue

bridge,

water quality monitor attached

to bridge abutment on southeast side of

river, 2 feet below water surface.

C&W Indiana Railroad Little Calumet River

5.2

miles below SEPA 1, 1.5 miles

above SEPA 2, 3.6 miles below Tho-

mas J. O'Brien Lock and Dam, 1.3

miles above Calumet

WRP outfall,

water quality monitor attached to north-

east side C&W Indiana RR bridge, 3

feet below water surface.

Halsted Street

Little Calumet River

7.7

miles

below SEPA 1, 1.0 mile bc-

low SEPA 2, 1.2 miles below Calumet

WRP, 0.5 mile above junction with

Calumet-Sag Channel, water quality

monitor

attached to southeast side Hal-

sted Street bridge, 3 feet below water

surface.

8

---

TABLE I (Continued): DEEP-DRAFT CONTINUOUS DISSOLVED OXYGEN

MONITORING STATIONS

Monitoring

Station

Waterway

Calumet River System (Continued)

Cicero Avenue

Calumet-Sag Channel

104`' Avenue

Calumet-Sag Channel

Route 83

Calumet-Sag Channel

Description of

Monitoring Station

3.1 miles

below SEPA

3, 3.3 miles

above

SEPA 4, water quality

monitor

attached to northwest

side Cicero Ave-

nue bridge

,

3 feet below water surface.

4.6

miles below SEPA 4, 3.2 miles

above Canal Junction SEPA Station,

water quality

monitor in center of

channel, 6 inches above bottom.

0.4

mile above junction with Chicago

Sanitary and Ship Canal, 0.3 mile above

Canal Junction SEPA Station, water

quality

monitor on southwest side Illi-

nois Central-Gulf

RR bridge, 3 feet

below water surface.

9

---

TABLE 2: MINIMUM, MAXIMUM, AND MEAN HOURLY

DISSOLVED OXYGEN CONCENTRATIONS'

Monitoring

DO Concentration {mg(L)

Station

Waterway

Minimum

Maximum Mean

Chicago River System

Main Street

North Shore Channel

0.0

33.4

9.7

Foster Avenue

North Shore Channel

4.0

11.2

7.7

Addison Street

North Branch Chicago River

0.0

12.0

7.8

Fullerton Avenue

North Branch Chicago River

0.0

11.0

7.1

Kinzie Street

North Branch Chicago River

0.8

11.7

7.0

Clark Street

Chicago River

5.8

12.8

9.0

Loomis Street

South Branch Chicago River

2.2

12.5

7.6

Vh Street

Bubbly Creek

0.0

15.6

3.2

Interstate Highway 55

Bubbly Creek

0.0

12.0

5.4

Cicero Avenue

Chicago Sanitary and Ship Canal

OA

10.8

6.3

B&O Central Railroad

Chicago Sanitary and Ship Canal

1.3

10.1

6.8

Route 83

Chicago Sanitary and Ship Canal

0.0

9.0

5.6

Lockport Powerhouse

Chicago Sanitary and Ship Canal

0.3

9.0

5.6

Des Plaines River System

Jefferson Street

Des Plaines River

2.4

12.8

7.3

Calumet River System

Torrence Avenue

Grand Calumet River

0.0

30.2

8.2

C&W Indiana Railroad

Little Calumet River

1.9

21.9

9.5

Halsted Street

Little Calumet River

3.5

12.9

6.9

Cicero Avenue

Calumet-Sag Channel

3.2

13.1

7.0

104`h Avenue

Calumet-Sag Channel

2.9

13.0

7.0

Route 83

Calumet-Sag Channel

2.7

13.9

6.8

ssolved

Di

oxygen was measured hourly using a YSI Model 6920 or Model 6600 continuous water

quality monitor.

10

---

TABLE 3: NUMBER AND PERCENT OF DISSOLVED OXYGEN VALUES

NOT MEETING ACCEPTANCE CRITERIA'

Monitoring

Station

Waterway

Number of

Percent of

DO Values

DO Values

Rejected

Rejected

Chicago River System

Main Street

North Shore Channel

627

7

Foster Avenue

North Shore Channel

336

4

Addison Street

North Branch Chicago River

165

2

Fullerton Avenue

North Branch Chicago River

338

4

Kinzie Street

North Branch Chicago River

2

0

Clark Street

Chicago River

361

4

Loomis Street

South Branch Chicago River

2

0

36th Street

Bubbly Creek

352

4

Interstate Highway 55

Bubbly Creek

547

6

Cicero Avenue

Chicago Sanitary and Ship Canal

169

2

B&O Central Railroad

Chicago Sanitary and Ship Canal

4

0

Route 83

Chicago Sanitary and Ship Canal

1,861

21

Lockport Powerhouse

Chicago Sanitary and Ship Canal

Des Plaines River System

344

4

Jefferson Street

Des Plaines River

Calumet River System

171

2

Torrence Avenue

Grand Calumet River

485

6

C&W Indiana Railroad

Little Calumet River

174

2

Halsted Street

Little Calumet River

343

4

Cicero Avenue

Calumet-Sag Channel

173

2

104th Avenue

Calumet-Sag Channel

1,575

18

Route 83

Calumet-Sag Channel

4

0

Dissolved oxygen was measured hourly using a YSI Model 6920 or Model 6600 continuous wa-

ter quality monitor. DO values were rejected based on quality control check and/or operational

problems with monitor.

11

---

TABLE 4: NUMBER AND PERCENT OF DISSOLVED OXYGEN VALUES

MEASURED ABOVE THE ILLINOIS POLLUTION CONTROL BOARD'S

WATER QUALITY STANDARD'

Monitoring

Station

IPCB

Number

Number

Percent

DO

of DO

Above

Above

Waterway

Standard

Values

Standard

Standard

Chicago River Syste

Main Street

North Shore Channel

5

8,133

7,362

91

Foster Avenue

North Shore Channel

4

8,424

8,423

100

Addison Street

North Branch Chicago River

4

8,595

8,587

>99

Fullerton Avenue

North Branch Chicago River

4

8,422

8,362

>99

Kinzie Street

North Branch Chicago River

4

8,758

8,645

99

Clark Street

Chicago River

5

8,399

8,399

100

Loomis Street

South Branch Chicago River

4

8,758

8,732

>99

36"' Street

Bubbly Creek

4

8,408

2,338

28

Interstate Highway 55

Bubbly Creek

4

8,213

6,281

77

Cicero Avenue

Chicago Sanitary and Ship Canal

4

8,591

8,223

96

B&O Central Railroad

Chicago Sanitary and Ship Canal

4

8,756

8,612

98

Route 83

Chicago Sanitary and Ship Canal

4

6,899

5,874

85

Lockport Powerhouse

Chicago Sanitary and Ship Canal

4

8,416

6,766

80

Des Plaines River System

Jefferson Street

Des Plaines River

4

8,589

8,148

95

Calumet River System

Torrence Avenue

Grand Calumet River

4

8,275

6,197

75

C&W Indiana Railroad

Little Calumet River

4

8,586

8,448

98

Halsted Street

Little Calumet River

4

8,417

8,412

>99

Cicero Avenue

Calumet-Sag Channel

3

8,587

8,587

100

104"' Avenue

Calumet-Sag Channel

3

7,185

7,182

100

Route 83

Calumet-Sag Channel

3

8,756

8,729

>99

Dissolved oxygen was measured hourly using a YSI Model 6920 or Model 6600 continuous water quality

monitor.

12

---

TABLE 5: PERCENT OF DISSOLVED OXYGEN VALUES IN SELECTED RANGES

Monitoring

Percent of DO Values in Range (mglL)

Station

Waterway

0-<1 1-<2

2-<3

3-<4

4-<5

>5

Chicago River System

Main Street

North Shore Channel

1

<1

<1

2

6

91

Foster Avenue

North Shore Channel

0

0

0

0

<1

>99

Addison Street

North Branch Chicago River

0

0

0

0

<1

>99

Fullerton Avenue

North Branch Chicago River

0

0

<1

<1

5

94

Kinzie Street

North Branch Chicago River

0

<1

<1

<1

6

93

Clark Street

Chicago River

0

0

0

0

0

100

Loomis Street

South Branch Chicago River

0

0

<1

<1

1

99

36th Street

Bubbly Creek

33

18

13

7

4

24

Interstate Highway 55

Bubbly Creek

6

4

5

9

16

61

Cicero Avenue

Chicago Sanitary and Ship Canal

<1

<1

<1

3

18

78

B&O Central Railroad

Chicago Sanitary and Ship Canal

0

<1

<1

1

6

92

Route 83

Chicago Sanitary and Ship Canal

<1

<1

2

11

23

62

Lockport Powerhouse

Chicago Sanitary and Ship Canal

<1

1

4

15

16

65

Des Plaines River System

Jefferson Street

Des Plaines River

0

0

<1

5

12

83

Calumet River System

Torrence Avenue

Grand Calumet River

4

4

7

9

8

67

C&W Indiana Railroad

Little Calumet River

0

0

<1

1

5

93

Halsted Street

Little Calumet River

0

0

0

<1

1

99

Cicero Avenue

Calumet-Sag Channel

0

0

0

<1

7

92

104th Avenue

Calumet-Sag Channel

0

0

0

1

10

89

Route 83

Calumet-Sag Channel

0

0

<1

2

15

83

13

---

FIGURE 1: CONTINUOUS DISSOLVED OXYGEN MONITORING AND

AMBIENT WATER QUALITY MONITORING SAMPLE STATIONS

IRusFe Woo

ds

loath Dam

0'_'

LEC-;ENE:):

n

MinorWRPMow

Ma*WRP Inflow

- General Use Waters

Secondary Contact Waters

211)

AWOM

Sample Stations

r

oute 83

Ca-Sag)

CDOM Sample Stations

Wolf

Road

Route 83

C( SSC)

Lockport

Powerhouse

T,o[Wersnn Street

f

.roue,

14

Material Service Road

^ tar .'-,

ae{c

Central Park

Avenue

Ogden

Avenue

w-

Cicero

lvenue

Rnirrna

Fullerton

Avenue

Foster

avenue

Addi-wn

Street

Kinzie Street

and Avenu

Clark Street

& wl Railroa

Ilnhrrran Avenue

1.

lrrdiana

97 ce

---

FIGURE 2: DISSOLVED OXYGEN CONCENTRATION MEASURED HOURLY AT MAIN STREET

ON THE NORTH SHORE CHANNEL FROM JANUARY 2006 THROUGH DECEMBER 2006

40

32

24

16

8

0

Jan

Feb

Mar

IPCB General Use DO Standard

is shown as a dashed (- - -) line

DO Shall Not Be Less Than 5.0 mg/L

ND - No Data

ND

ND

------------

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

---

FIGURE 3: DISSOLVED OXYGEN CONCENTRATION MEASURED HOURLY AT FOSTER AVENUE

ON THE NORTH SHORE CHANNEL FROM JANUARY 2006 THROUGH DECEMBER 2006

Q

15

12

3

0

IPCB Secondary Contact DO Standard

is shown as a dashed (- - -) line

DO Shall Not Be Less Than 4.0 mg/L

ND = No Data

I

N

-------------------------------------------------------------

Jan

Feb

Mar

Apr

May

Jun

Jul

.Aug

Sep

Oct

Nov

Dec

---

FIGURE 4: DISSOLVED OXYGEN CONCENTRATION MEASURED HOURLY AT ADDISON STREET

ON THE NORTH BRANCH CHICAGO RIVER FROM JANUARY 2006 THROUGH DECEMBER 2006

1S

12

9

I

IPCB Secondary Contact DO Standard

is shown as a dashed (--- ) line

DO Shall Not Be Less Than 4.0 rng/L

4

---------------------

NN

I

i

ND = No Data

d

A

0

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

---

FIGURE 5: DISSOLVED OXYGEN CONCENTRATION MEASURED HOURLY AT FULLERTON AVENUE

ON THE NORTH BRANCH CHICAGO RIVER FROM JANUARY 2006 THROUGH DECEMBER 2006

15

12

M

0

IBCB Secondary Contact DO Standard

is shown as a dashed

(--- )

line

DO Shall Not Be Less Than 4.0 mg/L

ND

i6

N

ND = No Data

vW

r

i

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

---

FIGURE 6: DISSOLVED OXYGEN CONCENTRATION MEASURED HOURLY AT KINZIE STREET

ON THE NORTH BRANCH CHICAGO RIVER FROM JANUARY 2006 THROUGH DECEMBER 2006

15

IPCB Secondary Contact DO Standard

is shown as a dashed (- - -) line

DO Shall Not Be Less Than 4.0 mg/L

12

I

w

I

I

I

0

Jan

+

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

---

FIGURE 7: DISSOLVED OXYGEN CONCENTRATION MEASURED HOURLY AT CLARK STREET

ON THE CHICAGO RIVER FROM JANUARY 2006 THROUGH DECEMBER 2006

20 -

IPCB General Use DO Standard

is shown as a dashed (- - -)

line

DO Shall Not Be Less Than 5.0 mg(L

16

12

R

A

N

ND

ND = No Data

N

0

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

---

FIGURE 8: DISSOLVED OXYGEN CONCENTRATION MEASURED HOURLY AT LOOMIS STREET

ON THE SOUTH BRANCH CHICAGO RIVER FROM JANUARY 2006 THROUGH DECEMBER 2006

20

IPCB Secondary Contact DO Standard

is shown as a dashed (- - -)

line

DO Shall Not Be Less Than 4.0 mg/L

16

12

0

Jan+

---------------------------

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

---

FIGURE 9: DISSOLVED OXYGEN CONCENTRATION MEASURED HOURLY AT 36TH STREET

ON BUBBLY CREEK FROM JANUARY 2006 THROUGH DECEMBER 2006

IPCB Secondary Contact DO Standard

is shown as a dashed (--- ) line

DO Shall Not Be Less Than 4.0 mg/L

ND = No Data

--------- ---

N

ND

20

16

12

S

4

0

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

---

FIGURE 10: DISSOLVED OXYGEN CONCENTRATION MEASURED HOURLY AT INTERSTATE HIGHWAY 55

ON BUBBLY CREEK FROM JANUARY 2006 THROUGH DECEMBER 2006

Jan.

IPCB Secondary Contact DO Standard

is shown as a dashed (- - -) line

DO Shall Not Be Less Than 4.0 mg/L

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

---

FIGURE 11: DISSOLVED OXYGEN CONCENTRATION MEASURED HOURLY AT CICERO AVENUE

ON THE CHICAGO SANITARY AND SHIP CANAL FROM JANUARY 2006 THROUGH DECEMBER 2006

15

12

6

0

Jan

IPCB Secondary Contact DO Standard

is shown as a dashed (- - -) line

DO Shall Not Be Less Than 4.0 mg/L

ND - No Data

fig

I

NA

------------------

------

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

---

FIGURE 12: DISSOLVED OXYGEN CONCENTRATION MEASURED HOURLY AT B&O CENTRAL RAILROAD

ON THE CHICAGO SANITARY AND SHIP CANAL FROM JANUARY 2006 THROUGH DECEMBER 2006

15

IPCB Secondary Contact DO Standard

is shown

as a dashed (--- ) line

DO Shall Not Be Less Than 4.0 mg/L

12

i

11

I

R

a

0

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

---

FIGURE 13: DISSOLVED OXYGEN CONCENTRATION MEASURED HOURLY AT ROUTE 83

ON THE CHICAGO SANITARY AND SHIP CANAL FROM JANUARY 2006 THROUGH DECEMBER 2006

15

12

6

3

0

IPCB Secondary Contact DO Standard

is shown as a dashed (- _ -) line

DO Shall Not Be Less Than 4.0

mg/L

ND - No Data

ND

NA

ND

ND

k-

Nr

ND

N

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

---

FIGURE 14: DISSOLVED OXYGEN CONCENTRATION

MEASURED

HOURLY AT LOCKPORT

POWERHOUSE

ON THE CHICAGO SANITARY AND SHIP CANAL FROM JANUARY

2006 THROUGH DECEMBER 2006

IPCB Secondary Contact DO Standard

is shown as a dashed (- - -) line

DO Shall Not Be Less Than 4.0 mg/L

ND = No Data

0

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

---

FIGURE 15: DISSOLVED OXYGEN CONCENTRATION MEASURED HOURLY AT JEFFERSON STREET

ON THE DES PLAINES RIVER FROM JANUARY 2006 THROUGH DECEMBER 2006

20

IPCB Secondary Contact DO Standard

is shown as a dashed (- - -) line

DO Shall Not Be Less Than 4.0 mg/L

16

12

I

S

ppl

I

ND = No Data

Q

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

---

FIGURE 16: DISSOLVED OXYGEN CONCENTRATION MEASURED HOURLY AT TORRENCE AVENUE

ON THE GRAND CALUMET RIVER FROM JANUARY 2006 THROUGH DECEMBER 2006

IFCB Secondary Contact DO Standard

is shown as a dashed (- - -)

line

DO Shall Not Be Less Than 4.0 mg/L

---

FIGURE 17: DISSOLVED OXYGEN CONCENTRATION MEASURED HOURLY AT C&W INDIANA RAILROAD

ON THE LITTLE CALUMET RIVER FROM JANUARY 2006 THROUGH DECEMBER 2006

25

20

5 15

A

5

0

A

IPCB Secondary Contact DO Standard

is shown as a dashed (--- ) line

DO Shall Not Be Less Than 4.0 mg/L

ND = No Data

ND

A

- - - - - - - - - - - - - - - -

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

---

FIGURE 18: DISSOLVED OXYGEN CONCENTRATION MEASURED HOURLY AT HALSTED STREET

ON THE LITTLE CALUMET RIVER FROM JANUARY 2006 THROUGH DECEMBER 2006

20

16

12

8

4

0

IPCB Secondary Contact DO Standard

is shown as a dashed (- - -) line

DO Shall Not Be Less Than 4.0 mg/L

ND - No Data

,yT.1W.jrT ^

W" NO

ND

------------------------------

-------------------------------

------------

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

---

FIGURE 19: DISSOLVED OXYGEN CONCENTRATION MEASURED HOURLY AT CICERO AVENUE

ON THE CALUMET-SAG CHANNEL FROM JANUARY 2006 THROUGH DECEMBER 2006

20 -

IPCB Secondary Contact DO Standard

is shown as a dashed (- - -) line

DO Shall Not Be Less Than 3.0 mg/L

6

0

Q

0

0

ND = No Data

0

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

---

FIGURE 20: DISSOLVED OXYGEN CONCENTRATION MEASURED HOURLY AT 104TH AVENUE

ON THE CALUMET-SAG CHANNEL FROM JANUARY 2006 THROUGH DECEMBER 2006

20

16

12

8

4

0

IPCB Secondary Contact DO Standard

is shown as a dashed (- - -) line

DO Shall Not Be Less Than 3.0 mg/L

ND No Data

ND

^

ND

i

Al

km

ND

ND

ND

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

---

FIGURE 21:

DISSOLVED

OXYGEN CONCENTRATION

MEASURED

HOURLY AT ROUTE 83

ON THE CALUMET-SAG CHANNEL

FROM

JANUARY

2006 THROUGH DECEMBER 2006

20

IPCB Secondary Contact DO Standard

is shown as a dashed (- - -) line

DO Shall Not Be Less Than 3.0 mg/L

16

12

A

I

0

m+

h

ti

0

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

---

REFERENCES

Chapman, G., "Water Quality Criteria for Dissolved Oxygen," EPA 44015-86-003, United States

Environmental Protection Agency, Office of Water Regulations and Standards, Washington, D.C.,

1986.

Lanyon, R., "Description of the Chicago Waterway System," Use Attainability Analysis Study

Conducted by Illinois Environmental Protection Agency in Cooperation with Metropolitan Water

Reclamation District of Greater Chicago, Illinois, May 2002.

35

---

APPENDIX A

WEEKLY DO SUMMARY STATISTICS AT ALL DEEP-DRAFT

MONITORING STATIONS DURING 2006

---

TABLE A-1: WEEKLY DO SUMMARY STATISTICS AT MAIN STREET

ON THE NORTH SHORE CHANNEL DURING 2006

Number of

DO Concentration

(mg/L)

Percent DO

Values Above

Monitoring Dates

DO Values

Minimum

Maximum

Mean

1PCB Standard

01/01/06

-

01/01/06

24

6.1

6.8

6.4

100

01/02/06

-

01

/

08/06

168

4.8

7.9

6.2

98

01/09/06 - 01/15/06

168

6.0

8.8

7.5

100

01/16/06

- 01/22/06

168

7.0

9.6

8.5

100

01/23/06 -

01/29

/

06

168

6.4

11.9

9.4

100

01130/06 - 02

/

05/06

167

8.8

25.0

15.3

100

02/06/06 - 02/12/06

168

21.2

33.4

29.0

100

02/13/06 -

02/19/

06

168

13.6

31.4

22.7

100

02/20/06

- 02/26/06

168

15.2

23.7

19.5

100

02/27

/

06 - 03

/

05/06

168

16.3

31

.

6

26.7

100

03/06/06 - 03/12/06

168

7.4

21.0

13.3

100

03/13/06 - 03/19/06

168

7.9

15.4

12.7

100

03/20/06 - 03/26/06

168

13.3

21.1

16.1

100

03/27/06 - 04/02/06

167

5.5

13.1

9.1

100

04/03/06 -

04/09/06

167

2.9

7.1

5.4

64

04/10/06 - 04/16/

06

168

5.9

143

8.0

100

04/17106 - 04/23/

06

168

4.4

11.0

6.7

94

04/24/06 - 04

/

30/06

168

4.9

11,6

8.2

99

05/01/06 - 05/07/06

168

5.0

9.3

7.5

100

05/08/06 - 05/14/06

167

7.6

10.6

9.1

100

05/15

/

06 -

05

/

21/06

168

7.9

10

.

3

9.4

100

05/22

/

06 - 05/28/06

168

7.3

11.2

9.6

100

05129/06 - 06/04/06

168

7.0

11.7

9.7

100

06/05

/

06

- 06/11/06

168

3.5

10.1

8.2

88

06/12/06 - 06/18

/

06

168

5.2

8.6

7.6

100

06/19/06 - 06

/

25/06

169

4.5

8.8

7.6

99

06/26

/

06 - 07

/

02/06

168

5.0

8.3

6.7

100

07/03/06 - 07/09/06

168

5.4

9.1

7.2

100

07/10/06 - 07/16106

168

5.4

9.8

7.3

100

07/17/06 - 07/23/06

37

6.6

7.7

73

100

07/24/06 - 07/30/06

131

4.9

9.9

7.4

99

07/31/06 - 08/06/06

37

6.7

10.4

8.9

100

08/07/06 - 08/13/06

130

7.3

9.1

8.1

100

---

TABLE A-1 (Continued): WEEKLY DO SUMMARY STATISTICS AT

MAIN STREET ON THE NORTH SHORE CHANNEL DURING 2006

Number of

DO Concentration (mg/L)

Percent DO

Values Above

Monitoring Dates

DO Values

Minimum

Maximum

Mean

IPCB Standard

08/14/06 - 08/20/06

168

4.8

8.4

7.1

98

08/21/06

- 08/27/06

168

4.4

7.8

6.4

93

08/28/06 - 09/03/06

168

5.1

8.1

6.9

100

09/04/06 - 09/10/06

168

5.3

8.2

7.0

100

09/ 11 /06

- 09/17/06

168

0.4

7.0

5.2

58

09/18106 - 09/24/06

168

4.6

9.1

6.6

97

09/25106 - 10/01/06

85

0.2

8.9

6.6

75

10/02106 - 10/08/06

NO DATA

10/09/06 - 10/15/06

131

5.5

9.0

6.9

100

10/16/06 - 10/22/06

168

2.8

6.1

4.4

21

10/23/06 - 10/29/06

168

4.0

6.7

4.9

39

10/30/06 - 11/05106

169

4.6

14.4

8.9

93

11/06/06 - 11/12/06

168

8.3

19.8

13.9

100

11/13/06 - 11/19/06

168

7.0

19.8

14.5

100

11/20/06

- 11/26/06

168

14.0

20.1

17.2

100

11/27/06 - 12/03/06

168

OA

18.4

7.4

59

12/04/06 - 12/10/06

168

0.0

6.2

2.1

5

12/11/06 - 12/17/06

168

3.7

8.7

6.7

91

12/18/06 - 12/24/06

168

4.7

11.3

8.2

98

12/25/06 - 12/31/06

168

4.1

7.1

5.3

58

---

TABLE A-2: WEEKLY DO SUMMARY STATISTICS AT FOSTER AVENUE

ON THE NORTH SHORE CHANNEL DURING 2006

Number of

DO Concentration (mg/L)

Percent DO

Values Above

Monitoring Dates

DO Values

Minimum

Maximum

Mean

/

PCB Standard

01/01/06

- 01/01/06

24

8.2

9.5

8.6

100

01/02/06

-

01/08

/

06

168

7.2

9.6

8.4

100

01/09/06 -

01/15/

06

168

6.4

9.6

8.4

100

01/16/06

- 01/22/

06

168

7.0

9.6

8.5

100

01/23/06

-

01/29/06

168

6.3

9.8

8,7

100

01/30/06

-

02/05

/

06

168

6.6

9.4

8.5

100

02/06/06

-

02/12

/

06

168

7.6

9.9

8.8

100

02/13/06

- 02/19/06

168

6.7

11.

2

9.0

100

02/20/06

- 02/26/06

168

8.1

11.1

8.9

100

02/27/

06 -

03/05

/

06

38

8.3

8.9

8.5

100

03/06/06 -

03/12/06

131

6.7

9.6

8.3

100

03/13/06

-

03

/

19/06

168

6.2

9.4

8.4

100

03/20/06 -

03/26/06

168

7.3

10.5

8.2

100

03/27/06 -

04/02/06

167

6.0

9.3

8.1

100

04/03

/

06 - 04/09

/

06

167

6.8

9.6

8.3

100

04/10/06

-

04/16/06

168

6.4

8.7

7.8

100

04/17/06 -

04/23/06

168

5.6

9.7

7.9

100

04/24/06

-

04/30/06

168

5.9

9.5

7.4

100

05/01/06 -

05/07/06

168

5.3

8.8

7.5

100

05/08/06

- 05

/

14/06

168

6.5

8.9

7.7

100

05/15/06 - 05

/

21/06

168

6.7

9

.

6

8.0

100

05/22/06

- 05/28/06

168

4.5

8.5

7.3

100

05/29/06

- 06/04106

168

4.0

9.1

7.4

99

06/05

/

06 - 06

/

11/06

168

5.2

8.4

7.5

100

06/12/06

- 06

/

18/06

168

5.7

8.5

7.5

100

06/19/06 - 06/25

/

06

168

6.0

8.2

7.3

100

06/26

/

06 -

07

/

02/06

168

6.1

8.0

7.1

100

07/03/06 -

07/09/06

168

5.7

8.2

7.4

100

07/10/06

-

07/16/06

168

5.8

8.1

7.4

100

07/17/06

- 07

/23/06

168

6.5

7.9

7.1

100

07/24/06

- 07/30/06

168

6.0

7.9

7.2

100

07/31/06

- 08/06/06

168

5

.7

8.3

7.3

100

08/07/06

- 08

/

13/06

168

5,9

8.3

7.3

100

---

TABLE A-2 (

Continued

):

WEEKLY DO SUMMARY STATISTICS AT

FOSTER AVENUE ON THE NORTH SHORE CHANNEL DURING 2006

Number of

DO Concentration (mg/L)

Percent DO

Values Above

Monitoring Dates

DO Values

Minimum

Maximum

Mean

IPCB Standard

08/14/06

- 08/20/06

168

5.4

8.0

7.1

100

08/21/06 - 08/27/06

168

5.6

8.2

7.3

100

08/28/06 - 09/03/06

168

5.3

8.1

7.1

100

09/04/06 - 09/10/06

167

5.0

8.3

7.1

100

09/11/06 - 09/17/06

168

5.6

8.0

6.9

100

09/18/06

- 09/24/06

168

5.0

7.6

7.0

100

09/25/06 - 10/01/06

168

4.5

8.5

7.0

100

10/02/06 - 10/08/06

168

4.7

7.5

6.4

100

10/09/06 - 10/15/06

168

5.5

7.8

6.9

100

10/16/06

- 10/22/06

168

53

7.7

6.7

100

10/23/06

- 10/29/06

168

5.9

8.8

7.2

100

10/30/06 - 11/05/06

169

6.5

8.6

7.4

100

11/06/06 - 11/12/06

168

5.9

8.5

7.5

100

11/13/06 - 11/19/06

168

6.9

8.6

7.6

100

11/20/06 - 11/26/06

168

7.2

9.1

7.9

100

11/27/06 - 12/03/06

168

5.6

9.1

7.8

100

12/04106

- 12/10/06

37

7.5

8.7

8.1

100

12/11/06 - 12/17/06

132

7.4

8.8

8.1

100

12/18/06

- 12/24/06

168

6.9

9.3

8.4

100

12/25/06

- 12/31/06

168

6.6

9.3

8.2

100

---

TABLE A-3: WEEKLY DO SUMMARY STATISTICS AT ADDISON STREET

ON THE NORTH BRANCH CHICAGO RIVER DURING 2006

Number of

DO Concentration (mg/L)

Percent DO

Values Above

Monitoring Dates

DO Values

Minimum

Maximum

Mean

IPCB Standard

01/01/06

-

01/01/06

24

8.7

9.7

9.1

100

01/02/06 - 01/08/06

168

7.7

10.0

9.0

100

01/09/06 -

01/15/06

168

6.4

10.0

8.5

100

01/16/06 - 01/22/06

168

7.2

9.8

8.7

100

01/23/06 - 01/29/06

168

7.3

9.7

9.0

100

01/30/06 -

02/05/06

168

7.5

10.3

9.4

100

02/06/06 - 02/12/06

168

8.3

10.1

9.2

100

02/13/06 - 02/19/06

168

8.0

12.0

9.8

100

02/20/06 - 02/26/06

167

8.8

11.1

9.6

100

02/27/06 -

03/05/06

168

8.0

9.3

8.6

100

03/06/06 - 03/12/06

168

6.7

10.3

8.8

100

03/13/06 - 03/19/06

168

7.5

10.6

9.7

100

03/20/06 - 03/26/06

168

8.5

11.0

9.4

100

03/27/06 - 04/02/06

168

7.4

9.5

8.4

100

04/03/06 - 04/09/06

168

7.1

10.0

9.0

l00

04/10/06 - 04/16106

168

6.1

9.0

8.0

100

04/17/06

-

04/23106

168

6.2

9.1

7.7

100

04/24/06 - 04/30/06

167

5.6

8.7

6.9

100

05/01/06 - 05/07/06

168

6.4

8.4

7.4

100

05/08/06 - 05/14/06

168

6.2

8.6

7.3

100

05/15/06 - 05/21/06

168

6.1

8.9

7.5

100

05/22/06 - 05/28/06

36

6.4

7.5

7.0

100

05/29/06

-

06/04/06

133

2.9

7.6

6.3

97

06/05/06 - 06/11/06

168

5.4

7.6

6.7

100

06/12/06

- 06/18/06

168

5.0

7.6

6.6

100

06/19/06 - 06/25/06

168

5.2

7.3

6.3

100

06/26/06 - 07/02/06

169

2.9

7.5

6.3

99

07/03/06 - 07/09/06

168

4.7

7.6

6.6

100

07/10/06 - 07/16/06

168

5.1

7.4

6.5

100

07/17/06 - 07/23/06

168

4.3

7.1

6.2

100

07/24/06 - 07130/06

168

5.1

7.0

6.4

100

07/31/06 - 08/06/06

169

0.0

7.4

6.2

98

08/07/06 -

08/13/06

168

4.8

7.6

6.4

100

---

TABLE A-3 (Continued): WEEKLY DO SUMMARY STATISTICS AT

ADDISON STREET ON THE NORTH BRANCH CHICAGO RIVER DURING 2006

Number of

DO Concentration

(

mg/L)

Percent DO

Values Above

Monitoring Dates

DO Values

Minimum

Maximum

Mean

IPCB Standard

08/14/06 - 08/20/06

168

5.0

7.4

6.5

100

08/21/06

- 08/27

/

06

168

5.5

7.6

6.9

100

08/28

/

06 - 09

/

03/06

168

4.6

7.4

6.5

100

09/04

/

06 - 09/10

/

06

168

5.5

7.9

6.8

100

09/11

/

06 - 09

/

17/06

168

6.2

8.2

7.1

100

09/18

/

06 - 09

/

24/06

168

4.9

79

6.9

100

09/25

/

06 - 10/01

/

06

168

5.2

8.2

6.9

100

10/02

/

06 - 10/08/06

168

5.8

7.5

6.9

100

10/09/06

-

10/15/06

168

5.5

8.3

7.0

100

10/16/06 - 10

/

22/06

168

5.4

8.0

7.1

100

10/23/06 - 10

/

29/06

168

6.4

8.8

7.6

100

10/30/06

-

11/05/06

169

6.9

8.4

7.6

100

11/06/06 - 11

/

12/06

168

6.3

9.1

7.4

100

11/13/06 - 11

/

19/06

168

7.3

8.7

8.0

100

11/20/06

-

11/26/06

168

7.2

8.9

7.9

100

11/27/06 - 12/03/06

168

6.0

10.1

8.4

100

12/04/06

-

12/10/06

168

8.7

10.9

9.6

100

12/11/06 - 12/17/06

169

7.9

10.5

9.3

100

12/18/06 - 12/24/06

168

7.6

10.4

9.4

100

12/25/06 - 12/31/06

168

7.4

10.4

9.4

100

---

TABLE A-4: WEEKLY DO SUMMARY STATISTICS AT FULLERTON AVENUE

ON THE NORTH BRANCH CHICAGO RIVER DURING 2006

Number of

DO Concentration (mg/L)

Percent DO

Values Above

Monitoring Dates

DO Values

Minimum

Maximum

Mean

IPCB Standard

01/01/

06 - 01/01/06

24

8.3

9.6

9.1

100

01/02/06

-

01/08/06

168

7

.

7

9.7

8.8

100

01/09/06

- 01/15/06

168

6.2

9.5

8.1

100

01/16/06

-

01/22/06

168

6.7

83

8.0

100

01/23/06 - 01

/

29/06

168

6.2

9.4

8.5

100

01/30/06 - 02/05/06

167

7.1

10.0

9.1

100

02/06

/

06

- 02

/

12/06

168

8.5

10.2

9.3

100

02/13/06 - 02/19/06

168

7.0

11.0

9.0

100

02/20

/

06 - 02

/

26/06

168

8.6

11.0

9.4

100

02/27/06 - 03/05/06

168

8.0

9.4

8.6

100

03/06

/

06 - 03

/

12/06

168

6.1

9.8

8.4

100

03113/06 - 03

/

19/06

168

6.3

9

.

9

9.1

100

03/20

/

06

- 03

/

26/06

168

4

.

2

10.4

8.0

100

03/27

/

06 - 04

/

02/06

168

3.4

9.0

7.6

98

04/03/06 - 04/09/06

167

5.6

9.8

8.5

100

04/10/06 - 04

/

16/06

168

6.1

8.5

7.5

100

04/17/06 - 04/23/

06

168

4.2

7.8

6.2

100

04/24/06

- 04/30/06

168

3.6

7.8

6.2

97

05/01/06 - 05

/

07/06

168

5.9

7.8

6.7

100

05/08

/

06 - 05

/

14/06

36

5.6

6.8

6.2

100

05/15/06

-

05/21

/

06

132

5.8

7.9

6.8

100

05/22

/

06 - 05

/

28/06

168

3.4

7.2

6.0

98

05/29

/

06 - 06

/

04/06

168

2.2

6.6

5.4

97

06/05/06

- 06

/

11/06

168

4.4

7.2

5.8

100

06112

/

06 - 06

/

18/06

168

4.0

6.9

5.6

100

06/19

/

06 - 06/25

/

06

168

3.9

6.3

5.5

99

06/26/06 - 07/02/06

168

1.7

7.1

5.5

98

07/03

1

06

-

07

/

09/06

168

3

.

9

6.5

5.6

99

07/10/06 - 07/16/06

168

44

6.7

5.8

100

07/17/06 - 07/23/06

167

2.8

6.3

5.4

98

07/24/06 - 07/30106

168

4.7

6.2

5.5

100

07/31/06 - 08/06

/

06

168

0.0

6.3

5.1

91

08/07/06 - 08/13/06

36

3.3

5.2

4.4

78

---

TABLE A-4 (Continued): WEEKLY DO SUMMARY STATISTICS AT

FULLERTON AVENUE ON THE NORTH BRANCH CHICAGO RIVER DURING 2006

Number of

DO Concentration (mg/L)

Percent DO

Values Above

Monitoring Dates

DO Values

Minimum

Maximum

Mean

IPCB Standard

08/14/06 - 08

/

20/06

132

4.7

6.3

5.6

100

08/21/06

- 08/27/06

168

4.8

73

6.2

100

08/28

1

06

- 09

/

03/06

168

3.0

6.8

5.8

98.

09/04

/

06 - 09

/

10/06

167

5.0

7,0

6.0

100

09/11/06

- 09/17/06

168

3

.

4

7.2

6.0

99

09/18/06

- 09/24/06

168

3.7

7.5

6.0

98

09/25/06 - 10/01/06

168

4.7

7.5

6.5

100

10/02/06 - 10/08

/

06

168

4.9

7.5

6.5

100

10/09/06

-

10/15/06

168

5.4

7.8

6.7

100

10/16/06 - 10/22/06

168

4.9

7.3

6.5

100

10/23

/

06 - 10/29/06

168

6.1

8.1

7.3

100

10/30/06 - 11/05/06

169

6.4

7.9

7.2

100

11/06/06 - 11/12/06

168

5.7

8.7

7.0

100

11/13/06 - 11/19/06

168

7.0

8.2

7.6

100

11/20/06 - 11/26/06

168

6.7

8.3

7.4

100

11/27/06 - 12/03/06

168

4.9

9.8

8.0

100

12/04/06

-

12/10/06

168

8.4

10.1

9.3

100

12/11/06 - 12/17/06

169

7.4

9

.8

8.8

100

12/18/06 - 12/24

/

06

168

7.3

10.1

8.9

100

12/25/06 - 12/31/06

168

7.5

10

.1

9.1

100

---

TABLE A-5: WEEKLY DO SUMMARY STATISTICS AT KINZIE STREET

ON THE NORTH BRANCH CHICAGO RIVER DURING 2006

Number of

DO Concentration

(mg/L)

Percent DO

Values Above

Monitoring Dates

DO Values

Minimum

Maximum

Mean

IPCB Standard

01/01/06

-

01/01/06

24

6.6

8.4

7.6

100

01/02

/

06

- 01/08

/

06

168

6.9

9.2

8.4

100

01/09/06 - 01/15/06

167

6.6

8.7

7.7

100

01/16/06

-

01/22/06

168

6.6

9.0

8.0

100

01/23/06

- 01/29/06

168

6.6

9.6

8.4

100

01/30/06

-

02/05

/

06

168

6.0

9.3

8.3

100

02/06

/

06

- 02

/

12/06

168

8.1

9.5

9.0

100

02/13/06

- 02/19/06

168

7.7

11.7

9.3

100

02/20/06 - 02

/

26/06

168

8.6

11A

9.6

100

02/27/

06 - 03

/

05/06

168

7.9

9.1

8.5

100

03/06

/

06 - 03

/

12/06

168

6.5

9.6

8.3

100

03/13106 - 03

/

19/06

168

6.7

9.9

9.1

100

03/20/06

-

03/26

/

06

168

7.1

10.0

8.6

100

03/27/06

- 04/02/06

168

6.3

7.9

7.2

100

04/03/06 - 04/09/06

167

5.3

10.0

8.0

100

04/10/06

- 04/16/06

168

6

.

6

9.1

7.9

100

04/17

/

06 - 04

/

23/06

168

4.1

9.2

7.0

100

04/24/06 - 04

/

30/06

168

2.9

8.6

6.6

86

05/01/06 - 05/07

/

06

168

5.6

8.0

6.6

100

05/08/06 - 05/14/06

168

5.3

7.3

6.3

100

05/15106 - 05/21/06

168

5.5

7.3

6.5

100

05/22/06 - 05/28/06

168

4.9

7.2

6.0

100

05/29

/

06 - 06

/

04/06

168

4.0

6

.

5

5.5

100

06/05

/

06 - 06

/

11/06

168

4.5

6.9

5.9

100

06/12

/

06 - 06

/

18/06

168

4.3

6

.

8

5.7

100

06/19/06 - 06/25/06

168

4.4

6.1

5.5

100

06/26/06

- 07/02/06

168

3.7

6.7

5.6

98

07/03/06 - 07/09/06

168

3.8

6.6

5.7

99

07/10/06 - 07/16/06

168

3.7

6.7

5.8

99

07/17/06 - 07/23

/06

168

1.3

6.6

. 5.3

92

07/24/06 - 07/30/

06

168

4.6

6.2

5.5

100

07/31/06 - 08/06

/

06

168

0.8

6.8

4.9

82

08/07/06 - 08/13/06

168

3.9

6.6

5.5

99

---

TABLE A-5 (Continued): WEEKLY DO SUMMARY STATISTICS AT

KINZIE STREET ON THE NORTH BRANCH CHICAGO RIVER DURING 2006

Number of

DO Concentration (mg/L)

Percent DO

Values Above

Monitoring Dates

DO Values

Minimum

Maximum

Mean

IPCB Standard

08/14/06 - 08/20/06

168

4.2

63

5.5

100

08121/06 - 08/27/06

168

4.5

6.9

5.7

100

08/28/06 - 09/03/06

168

2.2

6.2

4.8

84

09/04/06 - 09/10/06

168

4.4

7.0

6.1

100

09/11/06 - 09/17/06

168

4.3

7.1

5.9

100

09/18/06 - 09/24/06

168

3.2

7.2

5.5

93

09/25/06- 10/01/06

168

4.7

7.5

6.3

100

10/02/06- 10/08/06

168

4.7

7.1

6.0

100

10/09/06 - 10/15/06

168

4.6

82

6.4

100

10/16/06- 10/22/06

168

5.4

7.8

6.4

100

10/23/06- 10/29/06

168

5.3

7.5

6.5

100

10/30/06- 11/05/06

169

5.9

7.5

6.6

100

11/06/06 - 11/12/06

168

5.6

79

6.6

100

11/13/06 - 11/19/06

168

6.9

7.8

7.4

100

11/20/06 - 11/26/06

168

6.6

8.3

73

100

11/27/06 - 12/03/06

167

4.8

9.8

7.7

100

12/04/06 - 12/10/06

168

8.2

10.8

9.2

100

12/11/06 - 12/17/06

168

7.3

9.2

8.4

l00

12/18/06 - 12/24/06

168

7.2

9.9

8.3

100

12/25/06 - 12/31/06

168

7.5

9.8

8.7

100

---

TABLE A-6: WEEKLY DO SUMMARY STATISTICS AT CLARK STREET

ON THE CHICAGO RIVER DURING 2006

Number of

DO Concentration (mg/L)

Percent DO

Values Above

Monitoring Dates

DO Values

Minimum

Maximum

Mean

IPCB Standard

01/01/06

- 01101106

24

9.5

10.1

9.8

100

01/02/06 -

01/08/06

168

8.5

10.1

9.3

100

01/09/06 - 01/15/06

168

7.9

10.0

8.9

100

01/16/06 - 01/22/06

168

8.1

10.2

9.5

100

01/23/06 - 01/29/06

168

8.1

11.0

9.9

100

01/30/06 - 02/05/06

168

7.1

10.4

9.0

100

02/06/06 - 02112/06

168

9.5

11.7

10.6

100

02/13/06 - 02/19/06

168

9.5

11.6

10.4

100

02/20/06 - 02/26/06

168

10.5

12.8

11.5

100

02/27/06

- 03/05/06

168

10.8

12.6

11.6

100

03106/06 - 03/12/06

168

8.2

12.1

10.3

100

03/13/06 - 03/19/06

168

7.3

10.1

9.0

100

03/20/06 - 03/26/06

168

89

10.3

9.6

100

03/27/06

-

04/02/06

168

8.7

9.8

9.3

100

04/03/06 - 04/09/06

167

6.7

10.5

9.2

100

04/10/06 - 04/16/06

168

7.8

10.0

9.0

100

04/17/06 - 04/23/06

168

6.9

9.9

8.6

100

04/24/06 - 04/30/06

168

6.5

9.5

8.4

100

05/01/06 - 05/07/06

168

6.5

9.5

8.1

100

05/08/06 - 05/14/06

168

7.1

10.0

8.9

100

05/15/06 - 05/21/06

168

7.8

9.5

8.4

100

05/22/06 - 05/28/06

168

6.9

10.5

9.0

100

05/29/06 - 06/04/06

168

7.5

10.7

9.3

100

06/05/06 - 06/11/06

168

6.8

10.5

9.3

100

06/12/06 -

06/18/06

168

7.1

8.7

8.2

100

06/19/06

-

06/25/06

168

7.8

9.4

8.7

100

06/26/06 -

07/02/06

35

8.1

8.9

8.5

100

07/03/06 - 07/09/06

109

7.7

8.7

8.3

100

07/10/06

-

07/16/06

168

7.9

9.3

8.6

100

07/17/06

- 07/23/06

168

7.0

8.7

7.8

100

07/24/06 -

07/30/06

35

6.9

7.6

7.4

100

07/31/06

- 08/06/06

134

8.4

10.8

9.6

100

08/07/06 - 08/13/06

167

7.6

9.4

8.3

100

---

TABLE A-6 (Continued): WEEKLY DO SUMMARY STATISTICS AT

CLARK STREET ON THE CHICAGO RIVER DURING 2006

Number of

DO Concentration (mg/L)

Percent DO

Values Above

Monitoring Dates

DO Values

Minimum

Maximum

Mean

IPCB Standard

08/14/06 - 08/20/06

167

7.4

8.5

8.0

100

08/21/06 - 08/27/06

168

6.8

8.0

7.4

100

08/28/06 - 09/03/06

168

5.8

7.4

7.1

100

09/04/06 - 09/10/06

168

6.7

8.1

7.6

100

09/11/06 - 09/17/06

168

6.3

7.8

7.3

100

09/18/06 - 09/24/06

168

6.7

8.4

7.7

100

09/25/06- 10/01/06

168

6.3

9.0

8.3

100

10/02/06- 10/08/06

168

6.2

9.0

7.6

100

10/09/06 - 10/15/06

168

5.9

9.6

8.5

100

10/16/06- 10/22/06

168

6.9

9.7

8.6

100

10/23/06 - 10/29/06

168

7.1

8.8

8.1

100

10/30/06 - 11/05/06

169

8.4

10.2

9.5

100

11/06/06 - 11/12/06

168

7.5

9.3

8.5

100

11/13/06 - 11/19/06

168

7.7

9.6

8.5

100

11/20/06 - 11/26/06

168

8.3

9.9

9.2

100

11/27/06 - 12/03/06

168

7.4

11.8

9.2

100

12/04/06 - 12/10/06

168

9.8

11.9

10.4

100

12/11/06 - 12/17/06

168

8.4

12.5

10.0

100

12/18/06 - 12/24/06

168

8.2

11.3

9.8

100

12/25/06 - 12/31/06

168

8.9

11.7

99

100

---

TABLE A-7: WEEKLY DO SUMMARY STATISTICS AT LOOMIS STREET

ON THE SOUTH BRANCH CHICAGO RIVER DURING 2006

Number of

DO Concentration (mg/L)

Percent DO

Values Above

Monitoring Dates

DO Values

Minimum

Maximum

Mean

IPCB Standard

01/01/06

- 01/01/06

24

8.9

9.0

8.9

100

01/02/06 - 01/08/06

168

7.5

9.5

8.7

100

01/09/06

- 01115/06

168

7.9

9.4

8.8

100

01/16/06 - 01/22/06

168

7.5

9.1

8.5

100

01/23/06

- 01/29/06

168

8.3

9.8

9.0

100

01/30/06 -

02/05/06

168

7.1

10.2

9,1

100

02/06/06 - 02/12/06

168

7.4

10.3

9.3

100

02/13/06 -

02119/06

168

7.9

11.4

9.6

100

02/20/06 -

02/26106

168

9.6

12.5

11.2

100

02/27/06

- 03/05/06

168

8.6

10.1

9.3

100

03/06/06

- 03/12/06

168

7.3

9.2

8.5

100

03/13106 - 03/19/06

168

6.9

10.8

9.1

100

03/20/06 - 03/26/06

168

8.9

9.8

9.2

100

03/27/06

- 04/02/06

168

7.3

9.0

8.0

100

04/03/06

- 04/09/06

167

6.0

9.3

7.9

100

04/10/06

- 04/16/06

168

7.9

9.3

8.5

100

04/17/06

- 04/23/06

168

4.5

8.8

7.2

100

04/24/06

- 04/30/06

168

6.7

8.4

7.6

100

05/01/06

- 05/07/06

168

6.2

8.1

6.9

100

05/08/06 - 05/14/06

168

5.8

8.6

7.0

100

05/15/06

- 05/21/06

168

5.6

7.3

6.5

100

05/22/06

- 05/28/06

168

5.5

7.2

6.4

100

05/29/06

- 06/04/06

168

4.7

7.6

6.4

100

06/05/06

- 06/11/06

167

5.4

7.5

6.7

100

06/12/06

- 06/18/06

168

5.0

6.9

6.1

100

06/19/06 - 06125/06

168

5.2

7.1

6.2

100

06/26/06 - 07102/06

168

4.3

8.0

6.2

100

07/03/06 - 07/09/06

168

5.8

7.5

6.7

100

07/10/06 - 07/16/06

168

6.0

7.0

6.6

100

07/17/06 - 07/23/06

168

2.5

7.1

5.7

91

07124/06 - 07/30/06

168

5.5

7.0

6.3

100

07/31/06

-

08/06/06

168

2.2

7.7

6.1

94

08/07106

- 08/13/06

168

6.2

7.6

7.0

100

---

TABLE A-7 (Continued): WEEKLY DO SUMMARY STATISTICS AT

LOOMIS STREET ON THE SOUTH BRANCH CHICAGO RIVER DURING 2006

Number of

DO Concentration (mg/L)

Percent DO

Values Above

Monitoring Dates

DO Values

Minimum

Maximum

Mean

IPCB Standard

08/14/06 - 08/20/06

168

5.5

7.5

6.7

100

08/21/06

- 08/27/06

168

5.6

7.0

6.4

100

08/28

/

06 - 09/03/06

168

4.2

8.5

6.2

100

09/04/06 - 09/101

06

168

6.3

7.7

7.0

100

09/11/06

- 09

/

17/06

168

4.0

8.0

6.7

99

09/18

/

06 - 09

/

24/06

168

5.7

8.4

7.1

100

09/25

/

06 - 10/01

/

06

168

6.4

10.4

7.7

100

10/02/06 - 10

/

08/06

168

4.5

8.2

6.8

100

10/09/06

-

10/15

/

06

168

5.8

8.9

7.0

100

10116

/

06 - 10/22

/

06

168

6.3

8.9

73

100

10/23/06

- 10/29/06

168

5.7

7.5

6.7

100

10/30/06

- 11/05/06

169

5.7

8.0

73

100

11/06/06

-

11/12/06

168

5.9

8.6

7.2

100

11/13/06

- 11/19/06

168

5.5

8.0

7.3

100

11/20106 - 11/26/06

168

7.4

8.7

7.9

100

11/27/06 - 12/03/06

168

4.3

9.5

7.5

100

12/04/06

- 12/

10/06

167

8.0

9

.

9

9.0

100

12/11/06 - 12

/

17/06

168

8.0

10.2

9.0

100

12/18/06

- 12/24/06

168

7.5

9.9

8.5

100

12/25/06

-

12131/06

168

8.6

9.9

9.4

100

---

TABLE A-8: WEEKLY DO SUMMARY STATISTICS AT 36TH STREET

ON BUBBLY CREEK DURING 2006

Number of

DO Concentration (mg/L)

Percent DO

Values Above

Monitoring Dates

DO Values

Minimum

Maximum

Mean

IPCB Standard

01/01/06 - 01/01/06

24

7.8

8.6

8.1

100

01/02/06 - 01/08/06

168

7.2

8.9

8.0

100

01/09/06 - 01/15/06

168

7.5

9.3

8.6

100

01/16/06

- 01/22/06

168

7.6

9.0

8.1

100

01/23/06 - 01/29/06

168

7.7

10.6

9.3

100

01/30/06 - 02/05/06

168

8.4

10.2

9.1

100

02/06/06

-

02/12/06

168

9.0

14.0

11.7

100

02/13/06 - 02/19/06

168

0.1

15.6

8.5

66

02/20/06 - 02/26/06

168

0.0

1.3

0.3

0

02/27/06 - 03/05/06

168

0.9

11.9

5.3

63

03/06/06 - 03/12/06

168

6.1

12.8

9.2

100

03/13/06 - 03/19/06

168

0.2

9.4

1.5

11

03/20/06 -

03/26/06

168

0.2

3.5

1.9

0

03/27/06 -

04/02/06

168

1.9

12.6

7.0

76

04/03/06 - 04/09106

167

0.6

7.5

3.6

45

04/10/06

-

04/16/06

168

04

6.8

3.1

30

04/17/06 - 04/23/06

58

0.5

5.6

1.7

9

04/24/06 - 04/30/06

110

0.0

5.2

2.2

4

05/01/06 - 05/07/06

168

0.0

3.4

0.9

0

05/08/06 - 05/14/06

168

0.0

3.8

1.2

0

05/15/06

- 05/21/06

168

0.5

6.3

2.4

18

05/22/06 - 05/28/06

127

2.3

6.0

4.3

75

05/29/06 - 06/04/06

168

0.7

6.1

2.4

14

06/05/06 -

06/11/06

168

1.4

13.1

5.7

75

06112/06 - 06/18/06

168

0.0

3.8

1.1

0

06/19/06

-

06/25106

168

0.0

4.7

1.9

5

06/26/06

- 07/02/06

168

0.3

5.4

1.8

3

07/03/06 - 07/09/06

82

1.1

12.4

5.4

54

07/10/06

- 07/16/06

111

0.4

6.4

3.0

32

07/17/06 - 07/23/06

168

0.1

6.1

1.6

13

07/24/06 - 07/30/06

168

0.0

3.7

1.1

0

07/31/06 - 08/06/06

168

0.0

6.3

1.6

10

08/07106 - 08/13/06

168

0.0

6.8

2.1

11

---

TABLE A-8 (Continued): WEEKLY DO SUMMARY STATISTICS AT

36TH STREET ON BUBBLY CREEK DURING 2006

Number of

DO Concentration (mg/L)

Percent DO

Values Above

Monitoring Dates

DO Values

Minimum

Maximum

Mean

IPCB Standard

08/14/06

- 08/20/06

168

0.3

3.5

1.7

0

08/21/06

- 08/27/06

168

0.7

3.6

1.8

0

08/28106 - 09/03/06

168

0.0

3.8

0.8

0

09/04/06 - 09/10/06

168

0.7

4.4

2.0

3

09/11/06 - 09/17/06

168

0.0

8.4

1.8

9

09/18/06

- 09/24/06

168

0.0

3.8

1.9

0

09/25/06

- 10/01/06

168

0.7

3.5

2.3

0

10102/06 - 10/08/06

168

0.0

7.3

1.2

8

10/09/06

- 10/15/06

168

0.1

9.6

3.4

39

10/16/06

- 10/22/06

168

0.0

10.7

1.9

22

10/23/06 - 10/29/06

168

0.0

2.7

0.8

0

10/30/06

- 11/05/06

169

0.0

4.3

2.0

6

11/06106

- 11/12/06

168

0.0

7,0

2.7

11

11/13/06

- 11119/06

168

0.0

1.7

0.4

0

11/20/06 - 11126/06

168

0.0

1.6

0.3

0

11/27/06 - 12/03/06

168

0.1

9.2

1.4

17

12/04/06 - 12/10/06

168

0.0

3.7

0.9

0

12/11/06

- 12/17/06

168

0.0

1.2

0.5

0

12/18/06 - 12/24/06

168

0.1

9.0

2.0

16

12/25/06

- 12/31/06

168

0.0

0.1

0.0

0

---

TABLE A-9: WEEKLY DO SUMMARY STATISTICS AT INTERSTATE HIGHWAY 55

ON BUBBLY CREEK DURING 2006

Number of

DO Concentration

(

mg/L)

Percent DO

Values Above

Monitoring Dates

DO Values

Minimum

Maximum

Mean

IPCB Standard

01/01/06

-

01

/

01/06

24

8.5

9

.

0

8.8

100

01/02106 - 01/08/06

168

7.6

9.1

8.4

100

01/09/06

-

01/15

/

06

168

8.1

9.4

8.7

100

01/16/06 - 01/22/06

168

7

.

3

8.9

8.0

100

01/23

/

06 - 01/29

/

06

168

8.0

9.1

8.3

100

01/30/06 - 02/05/06

168

7.2

9.2

8.4

100

02/06/06 - 02

/

12/06

168

8.7

10.3

9.4

100

02/13/06 - 02/19

/

06

168

2.5

12.0

8.0

92

02/20

/

06 - 02/26

/

06

169

5.0

10.5

8.0

100

02/27/

06 - 03

/

05/06

168

8.8

10.3

9.5

100

03/06

/

06 - 03/12

/

06

168

5.0

9.3

7.6

100

03/13/06

-

03/19/06

168

3.0

8.3

5.6

92

03/20

/

06 - 03

/

26/06

168

4.3

8.6

6.6

100

03/27/06 - 04/02/06

168

4.2

7.1

5.9

100

04/03/06 - 04/09/06

167

0.1

9.1

4.7

70

04/10/06 - 04/16

/

06

83

0.2

8.0

2.9

41

04/17/06 - 04/23/06

NO DATA

04/24/06 - 04/30/06

79

4.9

9.0

6.9

100

05/01/06

- 05/07/

06

168

3.5

8.0

5.3

95

05/08/06 - 05/14/06

132

3.3

8.1

5.5

95

05/15/06 - 05/21/06

168

2.7

7.3

5.5

93

05/22/06 - 05/28/06

168

3.8

7.4

6.0

98

05/29/

06 - 06

/

04/06

168

3.0

6.5

4.8

90

06/05

/

06

- 06

/

11/06

168

3.2

8.9

5.8

90

06/12/06

-

06/18

/

06

168

1.3

6.0

3.8

43

06/19

/

06 - 06/25

/

06

82

1.7

4.8

3.1

13

06/26

/

06 - 07

/

02/06

86

4.3

7.6

6.0

100

07/03/06

- 07/09/06

168

4.1

9.4

6.2

100

07/10/06 - 07/16106

168

4.4

7.2

5.5

100

07/17/06

-

07/23

/

06

168

0.1

6.4

3.4

46

07/24/06 - 07/30/06

167

0.4

6.8

3.6

49

07/31/06 -

08/06/06

168

0.0

7.9

2.6

42

08/07

/

06 - 08

/

13106

168

0.0

4.1

1.5

1

---

TABLE A-9 (Continued): WEEKLY DO SUMMARY STATISTICS AT

INTERSTATE HIGHWAY 55 ON BUBBLY CREEK DURING 2006

Number of

DO Concentration

(

mg/L)

Percent DO

Values Above

Monitoring Dates

DO Values

Minimum

Maximum

Mean

IPCB Standard

08/14

/

06 - 08/20/06

168

0.2

6

.2

3.7

52

08/21/06 - 08/27/06

168

2.6

5.7

4.5

79

08/28

/

06 - 09

/

03/06

168

0.1

6.2

3.8

45

09/04/06

- 09/10/06

168

3.5

7.0

5.3

92

09/11/06 - 09/17/06

168

0.2

7.2

4.0

60

09/18

/

06 - 09/24/06

168

1

.

9

7.3

4.9

74

09/25/06

- 10/01/06

168

2.8

8.0

5.5

78

10/02/06 - 10/08/06

168

0.0

7.5

3.1

38

10/09/06 - 10/15/06