INDIANA DEPARTMENT OF ENVIRONMENTAL MANAGEMENT 

We Protect Hoosiers and Our Environment. 

100 N. Senate Avenue • Indianapolis, IN 46204 

(800) 451-6027 • (317) 232-8603 • www.idem.IN.gov 

Michael R. Pence 

Governor 

Thomas W. Easterly 

Commissioner 

VIA ELECTRONIC MAIL 

Mr. Robert Lange 

Environmental Control Manager 

U.S. Steel Corporation 

One North Broadway 

Gary, IN 46402 

Dear Mr. Lange: 

March 21, 2014 

Re: NPDES Permit No. IN0000281 

Draft Permit Modification 

Gary Works Facility 

Gary, Indiana, Lake County 

Your request for a permit modification has been reviewed and processed in accordance with 

rules adopted under 327 IAC 5. Enclosed is a copy of the draft permit modification. Pursuant to 

IC 13-·15-5-1, IDEM will publish a general notice in the newspaper with the largest general 

circulation within the above county. A 30-day comment period is available in order to solicit 

input from interested parties, including the general public. 

Please review this draft permit modification and associated documents carefully to become 

familiar with the proposed terms and conditions. Comments concerning the draft permit 

modification shn1ld be submitted in accordance with the procedure outlined in the encloser 

public notice f(yr!:. We suggest that you meet with us to discuss major concerns or objectic,: .. 

you may have '· 'itl the draft permit modification. Questions concerning this draft permit 

modification may he addressed to Nikki Gardner of my staff, at 317/232-8707 or 

ngardner@idem.in. gov. 

Enclosures 

cc: Lake County Health Department 

. Sincerely, 

~D~ Stan Rigney,V C~~ Industrial NPDES Permits Section 

Office of Water Quality 

Chief, Permits Section, U.S. EPA, Region 5 

Lauren Legler, USS Gary Works 

An Equal Opportunity Employer A State that Works 

- @ Recycled Paper 
STATE OF INDIANA 

Page 1 of 139 

Permit No. IN0000281 

DEPARTMENT OF ENVIRONMENTAL MANAGEMENT 

AMENDED AUTHORIZATION TO DISCHARGE UNDER THE 

NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM 

In compliance with the provisions of the Federal Water Pollution Control Act, as 

amended, (33 U.S.C. 1251 et seq., the "Act"), and IDEM's permitting authority under IC 

13-15, 

U.S. STEEL-GARY WORKS 

UNITED STATES STEEL CORPORATION 

is authorized to discharge only via outfall locations designated in this permit, from an 

Integrated Steel Mill facility which manufactures iron and steel products, and coke and 

coke making byproducts that is located at One North Broadway, Gary, Indiana 46402, to 

receiving waters named the Grand Calumet River and Lake Michigan in accordance with 

effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, 

III, and IV hereof. 

The permit, as issued on January 22, 2010, and subsequently modified on March 

16, 2012 and February 8 2013, is hereby amended, to apply streamlined mercury 

variances, as contained herein. The amended provisions shall become effective 

-------. All terms and conditions of the permit not modified at this time 

remain in effect. Further, any existing condition or term affected by the amendments will 

remain in effect until the amended provisions become effective. This permit may be 

revoked for the nonpayment of applicable fees in accordance with IC 13-18-20. 

This permit and the authorization to discharge, as amended, shall expire at 

midnight February 28, 2015. In order to receive authorization to discharge beyond the 

date of expiration, the permittee shall submit such information and forms as are required 

by the Indiana Department of Environmental Management no later than 180 days prior to 

the date of expiration. 

Signed on _________________ for the Indiana 

Department of Environmental Management. 

Paul Higginbotham, Chief 

Permits Branch 

Office of Water Quality 
Page 2 of 139 

Pennit No. IN0000281 

TREATMENT FACILITY CLASSIFICATION 

The discharger has seven industrial wastewater treatment plants rated as Class D, 

classified in accordance with 327 IAC 5-22, Classification of Wastewater Treatment 

Plants. 

PART I 

A. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS 

1. During the period beginning on the effective date of this permit and lasting 

until the permittee redirects the flow from Outfall 010 to Outfall 005, the 

permittee is authorized to discharge from Outfall 005. The discharge is 

limited to non-contact cooling water used in the coal preparation, coke and 

coke byproducts manufacturing processes, non-contact cooling water used 

in the coke oven gas desulfurization facility, non-contact cooling water 

used in the coke plant boiler houses, treated process wastewater from the 

coke and coke byproducts manufacturing processes (internal Outfall 501 ), 

steam condensate, and storm water runoff. Samples taken in compliance 

with the monitoring requirements below shall be taken at a point 

representative of the discharge but prior to entry into the Grand Calumet 

River. 

This Table is no longer applicable and has been removed. The redirection 

of Outfall 010 through Outfall 005 was completed June 5, 2011. The 

combined discharge is regulated in Part I.A.2. 
Parameter 

Flow 

Oil & Grease [1] 

Selenium [5] 

Benzene 

Benzo-a-pyrene 

Interim 

Final [13] 

Ammonia (as N) 

Free Cyanide [2][17] 

Season 1 [16] 

Season 2 [16] 

Mercury [ 5] [7] [20] 

Page 3 of139 

Permit No. IN0000281 

2. During the period beginning when the flow from Outfall 010 has been 

redirected to Outfall 005, the permittee is authorized to discharge the 

combined flow through Outfall 005. The discharge is limited to noncontact cooling water used in the coal preparation, coke and coke 

byproducts manufacturing processes, non-contact cooling water used in 

the coke oven gas desulfurization facility, non-contact cooling water used 

in the coke plant boiler houses, treated process wastewater from the coke 

and coke byproducts manufacturing processes (internal Outfall 501 ), 

steam condensate, and storm water runoff. Samples taken in compliance 

with the monitoring requirements below shall be taken at a point 

representative of the discharge but prior to entry into the Grand Calumet 

River. Such discharge shall be limited and monitored by the permittee as 

specified below: 

DISCHARGE LIMITATIONS [6][11][14] 

Outfall 005 

Table 1 

Quantity or Loading 

Monthly Daily 

Quality or Concentration 

Monthly Daily 

Monitoring Requirements 

Measurement Sample 

Average Maximum 

Report Report 

2.1 

Report 

Report 

0.047 

Report 

3.5 

3.1 

4.2 

Report 

Report 

0.12 

Report 

8.2 

6.6 

Units Average Maximum 

MGD 

Report 

lbs/day 4.1 

lbs/day Report 

lbs/day Report 

lbs/day 0.093 

lbs/day Report 

lbs/day 

lbs/day 

6.9 

6.0 

Report 

8.2 

Report 

1.0 

0.23 

Report 

16.1 

13 

mg/1 

ug/1 

ug/1 

ug/1 

ug/1 

ug/1 

ug/1 

ug/1 

Frequency ~ 

Daily Continuous 

2 X Weekly 3 Grabs/24 Hrs. 

1 X Weekly 24-Hr. Comp. 

3 X Monthly 3 Grabs/24-Hrs 

2XWeekly 

2XWeekly 

2XWeekly 

2X Weekly 

2XWeekly 

24-Hr. Comp. 

24-Hr. Comp. 

24-Hr. Comp. 

See Part I.Q. 

See Part I.Q. 

WQBEL's 0.00066 0.0016 lbs/day 1.3 3.2 

Report 

ng/1 

ng/1 

ug/1 

ug/1 

mg/1 

mg/1 

Bi-Monthly [15] 

Bi-Monthly [15] 

Daily [9] 

2XMonthly 

2XMonthly 

2XMonthly 

Grab 

Grab 

Grab 

Interim Discharge Limit [12] ------

Total Residual Chlorine [8][3] 4.1 

Fluoride Report 

Chloride Report 

Sulfate Report 

Whole Effluent Toxicity [18] 

Interim 

Final 

Temperature [4] 

9.2 [10] 

Report 

Report 

Report 

Quality or Concentration 

Parameter 

pH 

Daily Daily 

Minimum Maximum 

6.0 9.0 

lbs/day 

lbs/day 

lbs/day 

lbs/day 

2.4 [21] 

8 

Report 

Report 

Report 

Report 

1.0 

Table2 

Units 

s.u. 

18 

Report 

Report 

Report 

Report 

24-Hr. Comp. 

24-Hr. Comp. 

24-Hr. Comp. 

Quarterly [19] 24-Hr. Comp. 

Quarterly [19] 24-Hr. Comp. 

2 X Weekly 6 Grabs/24-Hrs. 

Monitoring Requirements 

Measurement Sample 

Frequency ~ 

3 X Weekly Grab 

[1] Additional monitoring and reporting requirements are contained in Part I.O., 

Visible Oil Corrective Action Monitoring Program. 
Page4 of139 

Permit No. IN0000281 

[2] Cyanide shall be measured and reported as Available (Free) Cyanide. See Part 

LQ. for additional requirements. 

[3] See Part LG. of the permit for Pollutant Minimization Requirements. 

[4] See Part liLA., for additional Temperature Requirements. 

[5] The permittee shall monitor and report the identified metals as total recoverable 

metals. 

[6] See Part LB. of the permit for the Narrative Water Quality Standards. 

[7] The permittee applied for, and received, a variance from the water quality criterion used to 

establish the referenced mercury WQBELs under the streamlined mercury variance (SMV) 

procedures of327 lAC 5-3.5. Compliance with the interim discharge limit will demonstrate 

compliance with this permit. See Part IV of the permit for additional requirements related 

to the SMV. 

[8] See Part LP. for Zebra and Quagga Mussel Control and Chlorination for 

additional requirements. 

[9] Monitoring for TRC shall be 1 X Daily during Zebra or Quagga mussel intake 

chlorination, and continue for three additional days after zebra or quagga mussel 

treatment has been completed. 

[10] Compliance with the daily maximum mass value will be demonstrated if the 

calculated mass value is less than 30.7 lbs/day for Outfall 005. 

[11] See the Fact Sheet for the water treatment additives in use at Outfall 005 that have 

been reviewed and are approved for use at this facility by the Commissioner. In 

the event that changes are to be made in the use of water treatment additives 

including dosage rates contributing to Outfall 005, the permittee shall notify the 

Indiana Department of Environmental Management as required in Part ILC.1 of 

this permit. The use of any new or changed water treatment additives or dosage 

rates shall not cause the discharge from any permitted outfall to exhibit chronic or 

acute toxicity. Acute and chronic aquatic toxicity information must be provided 

with any notification regarding any new or changed water treatment additives or 

dosage rates. 

[12] For the term of the NPDES permit, the permittee is subject to the interim 

discharge limit developed under the provisions of 327 lAC 5-3.5-8. Each 

reporting period (i.e., bi-monthly), the permittee shall report both a daily 

maximum value and an annual average value for mercury. The annual average 

value shall be calculated as the average of all daily values from the most recent 

twelve-month period. Reporting of the annual average value for mercury is not 

required during the first year of the permit term. Compliance with the interim 
Page 5 of 139 

Permit No. IN0000281 

discharge limit will be achieved when the average of daily values measured over 

the most recent (rolling) twelve-month period is less than the interim discharge 

limit. 

[13] The permittee has up to a thirty-four (34) month schedule of compliance from the 

effective date of the permit as outlined in Part J.D. of the permit in which to meet 

the final effluent limitations for Benzo(a)pyrene and the limits for Whole Effluent 

Toxicity (WET). Interim limitations shall apply until the final limits take effect. 

[14] To ensure that process waters from current coke plant operations are not 

discharged, US Steel shall certify to that effect with each monthly discharge 

monitoring report as follows: 

"I certify that, to the best of my knowledge and belief, and having 

consulted with the manager of coke plant operations and coke plant 

personnel responsible for managing and disposing of cokemaking and byproduct recovery wastewater, that process wastewaters generated from 

cokemaking and by-product recovery operations have not been discharged 

to the Grand Calumet River or to Lake Michigan through any outfall or 

conveyance since the last discharge monitoring report, except for the 

treated coke plant by-product recovery wastewater in Internal Outfall 

501." 

[15] Bi-Monthly monitoring shall be conducted in the months of February, April, June, 

August, October, and December of each year. 

[16} Season 1 ("salmonids absent") limitations apply April 1- September 30 of each 

year. Season 2 ("salmonids present") limitations apply October 1- March 31 of 

each year. These seasons are based on times when salmonids occur at the site. 

[17] US Steel may develop the appropriate studies to determine an alternate season. 

[18] See Part I.L. of the permit for Biomonitoring Requirements. 

[19] Samples shall be taken once at any time during each of the four annual quarters: 

(A) January-February-March; 

(B) April-May-June; 

(C) July-August-September; and 

(D) October-November-December. 

For quarterly monitoring, in the first quarter for example, the permittee may 

conduct sampling within the month of January, February or March. The result 

from this reporting timeframe shall be reported on the March DMR, regardless of 

which of the months within the quarter the sample was taken. 
Page 6 of139 

Permit No. IN0000281 

[20] The following EPA test methods and/or Standard Methods and associated LODs and 

LOQs are to be used in the analysis of the effluent samples. Alternative methods may 

be used if first approved by IDEM. 

Parameter 

Mercury 

EPA Method 

1631, Revision E 

LOD 

0.2 ng/1 

LOQ 

0.5 ng/1 

[21] Annual average for the purpose of the mercury interim discharge limit. 
Parameter 

Flow 

TSS 

Oil & Grease 

Selenium [1] 

Benzene 

Benzo-a-pyrcne 

Naphthalene 

Phenols (4AAP) 

Ammonia (as N) 

Cyanide [2] 

Total 

Free 

Parameter 

pH 

Page 7 of139 

Permit No. IN0000281 

3. During the period beginning on the effective date of this permit and lasting 

until the expiration date, the permittee is authorized to discharge 

cokemaking and by-product recovery area treatment system water 

including groundwater from the East Side Solid Waste Management Area 

(SWMA), from Internal Outfall SOl through Outfall 005, to the Grand 

Calumet River. Samples taken in compliance with the monitoring 

requirements below shall be taken at a point representative of the 

discharge but prior to commingling with any other process or non-process 

waters. Such discharge shall be limited and monitored by the pennittee as 

specified below: 

DISCHARGE LIMITATIONS 

Internal OutfalL 501 

Quantity or Loading Quality or Concentration Monitoring Requirements 

Monthly Daily Monthly Daily Measurement Sample 

Average Maximum Units Average Maximum Units Frequency ~ 

Report Report MGD Daily Continuous 

706 1,359 lbs/day Report Report mg/1 2 X Weekly 24-Hr. Comp. 

Report 50.4 lbs/day Report Report mg/1 2 X Weekly 3 Grabs/24 Hrs. 

Report Report lbs/day Report Report ug/1 2X Weekly 24-Hr. Comp. 

Report 0.25 lbs/day Report Report ug/1 3 X Monthly 3 Grabs/24-Hrs 

0.08 0.15 lbs/day Report Report ug/1 2X Weekly 24-Hr. Comp. 

0.09 0.15 lbs/day Report Report ug/1 2X Weekly 24-Hr. Comp. 

0.25 0.50 lbs/day Report Report ug/1 2X Weekly 24-Hr. Comp. 

27.9 40.4 lbs/day Report Report ug/1 2XWeekly 24-Hr. Comp. 

27.7 41.0 lbs/day Report Report ug/1 2 X Weekly See Part LQ. 

Report Report lbs/day Report Report ug/1 2 X Weekly See Part LQ. 

Table 2 

Quality or Concentration Monitoring Requirements 

Daily Daily Measurement 

Minimum Maximum Units Frequency 

Report Report s.u. 1 X Weekly 

[1] The permittee shall monitor and report the identified metals as total recoverable 

metals. 

[2] Cyanide shall be measured and reported as Total and Available (Free) Cyanide. 

See Part I.Q. for additional requirements. 

Sample 

~ 

Grab 
Page 8 of 139 

Permit No. IN0000281 

4. During the period beginning on the effective date of this permit and lasting 

until the flow CUITently discharging from Outfall 010 has been re-directed 

through Outfall 005, the permittee is authorized to discharge non-contact 

cooling water used in coal preparation, coke and coke byproducts 

manufacturing processes, and storm water runoff via Outfall 010 to the 

Grand Calumet River. Samples taken in compliance with the monitoring 

requirements below shall be taken at a point representative of the 

discharge but prior to entry into the Grand Calumet River. 

This Table is no longer applicable and has been removed. The redirection 

of Outfall 010 through Outfall 005 was completed June 5, 2011. The 

combined discharge is regulated in Part I.A.2. 
Parameter 

Flow 

Page 9 ofl39 

Permit No. IN0000281 

5. During the period beginning on the effective date of this permit, the 

permittee is authorized to discharge non-contact cooling water from blast 

furnace and sinter plant, steam condensate, treated SWD-1 Landfill 

wastewater, North Tennessee Street Drainage Sump effluent, and storm 

water runoff though Outfall 015 to the Grand Calumet River. Samples 

taken in compliance with the monitoring requirements below shall be 

taken at a point representative of the discharge but prior to entry into the 

Grand Calumet River. Such discharge shall be limited and monitored by 

the permittee as specified below: 

DISCHARGE LIMITATIONS [1][11][13] 

Outfall 015 

Table 1 

Quantity or Loading Quality or Concentration 

Monthly Daily Monthly Daily 

Average Mmdmum Average Maximum 

Report Report MGD 

Monitoring Requirements 

Measurement Sample 

Frequency ~ 

Daily Continuous 

Total Suspended Solids Report Report lbs/day Report Report mg/1 1 X Weekly 24-Hr. Comp. 

Oil & Grease [2] 

Ammonia (as N) 

CBOD5 

Free Cyanide [3] 

Phenols ( 4AAP) 

Lead [4] 

Zinc [4] 

Temperature [5] 

Report 

Report 

Report 

Report 

Report 

Report 

Report 

Report 

Report 

Report 

Report 

Report 

Report 

lbs/day Report 

lbs/day Report 

lbs/day Report 

lbs/day Report 

lbs/day Report 

lbs/day Report 

Report mg/1 

Report mg/1 

Report mg/1 

Report ug/1 

Report ug/1 

Report ug/1 

Report ug/1 

Report oF 

1 X Weekly Grab 

1 X Weekly 24-Hr. Comp. 

1 X Weekly 24-Hr. Comp. 

1 X Weekly See Part I.Q. 

1 X Weekly 24-Hr. Comp. 

1 X Weekly 24-Hr. Comp. 

1 X Weekly 24-Hr. Comp. 

1 X Weekly 6 Grabs/24-Hrs. 

Total Residual Chlorine [12] 0.11 0.26 [6] lbs/day 8 18 ug/1 Daily [7] Grab 

Mercury [4][8][14] 

WQBEL's 0.000018 0.000045 lbs/day 1.3 3.2 ng/1 Bi-Monthly [10] Grab 

Interim Discharge Limit [9] ------ 3. 7 [15] Report ng/1 Bi-Monthly [1 0] Grab 

Parameter 

pH 

Quality or Concentration 

Daily Daily 

Minimum Maximum 

6.0 9.0 

Units 

s.u. 

Table2 

Monitoring Requirements 

Measurement Sample 

Frequency ~ 

1 X Weekly Grab 

[1] The discharge of non-contact cooling waters from blast furnace and sintering 

operations is permitted only through Outfalls 015, 018, 019, and 035. 

[2] Additional monitoring and reporting requirements are contained in Part 1.0., 

Visible Oil Corrective Action Monitoring Program. 

[3] Cyanide shall be measured and reported as Available (Free) Cyanide. See Part 

I.Q. for additional requirements. 

[4] The permittee shall measure and report identified metals as total recoverable 

metals. 

[5] See Part III.A., for additional Temperature Requirements. 
Page 10 of 139 

Permit No. IN0000281 

[ 6] Compliance with the daily maximum mass value will be demonstrated if the 

calculated value is less than 0.85 lbs/day. 

[7] Monitoring for TRC shall be 1 X Daily during zebra or quagga mussel intake 

chlorination, and continue for three additional days after zebra or quagga mussel 

treatment has been completed. See Part I.P. for Zebra and Quagga Mussel 

Control and Chlorination for additional requirements. 

[8] The permittee applied for, and received, a variance from the water quality criterion used to 

establish the referenced mercury WQBELs under the streamlined mercury variance (SMV) 

procedures of 327 lAC 5-3.5. Compliance with the interim discharge limit will demonstrate 

compliance with this permit. See Part IV of the permit for additional requirements related 

to the SMV. 

[9] For the term of the NPDES permit, the permittee is subject to the interim 

discharge limit developed under the provisions of 327 lAC 5-3.5-8. Each 

reporting period (i.e., bi-monthly), the permittee shall report both a daily 

maximum value and an annual average value for mercury. The annual average 

value shall be calculated as the average of all daily values from the most recent 

twelve-month period. Reporting ofthe annual average value for mercury is not 

required during the first year of the permit term. Compliance with the interim 

discharge limit will be achieved when the average of daily values measured over 

the most recent (rolling) twelve-month period is less than the interim discharge 

limit. 

[10] Bi-monthly monitoring shall be conducted in the months ofFebruary, April, June, 

August, October, and December of each year. 

[11] See the Fact Sheet for the water treatment additives in use at Outfall 015 that have 

been reviewed and are approved for use at this facility by the Commissioner. In 

the event that changes are to be made in the use of water treatment additives 

including dosage rates contributing to Outfall 015, the permittee shall notify the 

Indiana Department of Environmental Management as required in Part II. C.1 of 

this permit. The use of any new or changed water treatment additives or dosage 

rates shall not cause the discharge from any permitted outfall to exhibit chronic or 

acute toxicity. Acute and chronic aquatic toxicity information must be provided 

with any notification regarding any new or changed water treatment additives or 

dosage rates. 

[12] See Part I. G. of the permit for Pollutant Minimization Requirements. 

[13] See Part LB. of the permit for the Narrative Water Quality Standards. 

[14] The following EPA test methods and/or Standard Methods and associated LODs and 

LOQs are to be used in the analysis of the effluent samples. Alternative methods may 

be used if first approved by IDEM. 
Parameter 

Mercury 

EPA Method 

1631, Revision E 

LOD 

0.2 ng/1 

Page 11 of 139 

Permit No. IN0000281 

LOQ 

0.5 ng/1 

[15] Annual average for the purpose of the mercury interim discharge limit. 
Parameter 

Flow 

Total Suspended Solids 

Oil & Grease 

Ammonic (as N) 

CBOD, 

Free Cyanide [1] 

Phenols \4AAP) 

Lead 12] 

Zinc [21 

Benzo( a)?yrene 

pH 

[1] 

[2] 

[3] 

Page 12 of 139 

Permit No. IN0000281 

6. During the period beginning on the effective date of this permit, the 

permittee is authorized to discharge treated SWD-1 Landfill wastewaters 

through Outfall607 to the Grand Calumet River via Outfall 015. Samples 

taken in compliance with the monitoring requirements below shall be 

taken at a point representative of the discharge but prior to commingling 

with any other process or non-process waters. Such discharge shall be 

limited and monitored by the permittee as specified below: 

DISCHARGE LIMITATIONS [4] 

Outfall607 

Quantity or Loading Quality or Concentration 

Monthly Daily Monthly Daily 

Average Maximum Units Average Maximum 

Report Report MGD 

Report Report lbs/day 30.0 60.0 

10.0 15.0 

Report Report lbs/day Report Report 

Report Report lbs/day Report Report 

Report Report lbs/day Report Report 

Report Report lbs/day Report Report 

Report Report lbs/day Report Report 

Report Report lbs/day Report Report 

Report Report lbs/day Report Report 

Report 

Units 

mg/1 

mg/1 

mg/1 

mg/1 

mg/1 

mg/1 

mg/1 

mg/1 

mg/1 

s.u. 

Monitoring Requirements 

Measurement Sample 

Frequency ~ 

Daily Continuous 

1 X Weekly 24-Hr. Comp. 

1 X Weekly Grab 

1 X Weekly 24-Hr. Comp. 

1 X Weekly 24-Hr. Comp. 

1 X Monthly See Part I.Q. 

1 X Monthly 24-Hr. Comp. 

1 X Monthly 24-Hr. Comp. 

1 X Monthly 24-Hr. Comp. 

1 X Quarter[3] 24-Hr. Comp. 

1 X Weekly Grab 

Cyanide shall be measured and reported as A vail able (Free) Cyanide. See Part 

I.Q. for additional requirements. 

The permittee shall measure and report identified metals as total recoverable 

metals. 

Samples shall be taken once during each of the four annual quarters: 

(A) January-February-March; 

(B) April-May-June; 

(C) July-August-September; and 

(D) October-November-December. 

For quarterly monitoring, in the first quarter for example, the permittee may 

conduct sampling within the month of January, February or March. The result 

from this reporting timeframe shall be reported on the March DMR, regardless of 

which of the months within the quarter the sample was taken. 

[ 4] By January 31st of each year, US Steel will provide all Mercury data collected for 

this outfall for the previous year. 
Parameter 

Flow 

Oil & Grease [2][14] 

Ammonia (as N) 

Free Cyanide [4] 

Phenols (4AAP) 

Copper [5] 

Mercury [5][15][7][17] 

WQBEL's 

Page 13 of 139 

Permit No. IN0000281 

7. During the period beginning on the effective date of this permit, the 

permittee is authorized to discharge blast furnace and sinter plant noncontact cooling water, storm water runoff and turbo-boiler blowdown, 

stock house misc. steam condensate & air conditioner non-contact water 

through Outfall 018 to the Grand Calumet River. Samples taken in 

compliance with the monitoring requirements below shall be taken at a 

point representative of the discharge but prior to entry into the Grand 

Calumet River. Such discharge shall be limited and monitored by the 

permittee as specified below: 

DISCHARGE LIMITATIONS [1][10][13] 

Outfall 018 

Table 1 

Quantity or Loading Quality or Concentration Monitoring Requirements 

Monthly Daily Monthly Daily 

Average Maximum Average Maximum 

Report Report MOD 

Report Report 

Report Report lbs/day Report Report 

Report lbs/day Report 

Report Report lbs/day Report Report 

Report Report lbs/day Report Report 

0.00063 0.0016 lbs/day 1.3 3.2 

mg/1 

mg/1 

mg/1 

mg/1 

mg/1 

ng/1 

Measurement Sample 

Frequency ~ 

Daily 

1 X Weekly 

2XMonthly 

1 X Monthly 

1 X Monthly 

1 X Weekly 

Continuous 

Grab 

24-Hr. Comp. 

See Part I.Q. 

24-Hr. Comp. 

24-Hr. Comp. 

Bi-Monthly[12] Grab 

Interim Discharge Limit[6]------ 2.9[16] Report ng/1 Bi-Monthly[12] Grab 

Temperature [3] Report oF 2 X Weekly 6 Grabs/24-Hrs. 

Total Residual Chlorine [11] 3.9 8.7 [8] lbs/day 8 18 ug/1 Daily [9] Grab 

Parameter 

pH 

[1] 

[2] 

[3] 

[4] 

[5] 

[6] 

Quality or Concentration 

Daily Daily 

Minimum Maximum 

6.0 9.0 

Units 

s.u. 

Table 2 

Monitoring Requirements 

Measurement Sample 

Frequency ~ 

1 X Weekly Grab 

The permittee may discharge noncontact cooling water from blast furnace and 

sintering operations only through Outfalls 015, 018, 019, and 035. 

Additional monitoring and reporting requirements are contained in Part I.O., 

Visible Oil Corrective Action Monitoring Program. 

See Part III.A. ofthe permit for the Temperature Requirements. 

Cyanide shall be measured and reported as Available (Free) Cyanide. See Part 

I.Q. for additional requirements. 

The permittee shall measure and report identified metals as total recoverable 

metals. 

For the term of the NPDES permit, the permittee is subject to the interim 

discharge limit developed under the provisions of 327 lAC 5-3.5-8. Each 
Page 14 of 139 

Permit No. IN0000281 

reporting period (i.e., bi-monthly), the permittee shall report both a daily 

maximum value and an annual average value for mercury. The annual average 

value shall be calculated as the average of all daily values from the most recent 

twelve-month period. Reporting of the annual average value for mercury is not 

required during the first year of the permit term. Compliance with the interim 

discharge limit will be achieved when the average of daily values measured over 

the most recent (rolling) twelve-month period is less than the interim discharge 

limit. 

[7] The permittee applied for, and received, a variance from the water quality 

criterion used to establish the referenced mercury WQBELs under the streamlined 

mercury variance (SMV) procedures of327 lAC 5-3.5. Compliance with the 

interim discharge limit will demonstrate compliance with this permit. 

[8] Compliance with the daily maximum mass value will be demonstrated if the 

calculated mass value is less than 29.1 lbs/day. 

[9] Monitoring for TRC shall be 1 X Daily during zebra or quagga mussel intake 

chlorination, and continue for three additional days after zebra or quagga mussel 

treatment has been completed. See Part I.P. for Zebra and Quagga Mussel 

Control and Chlorination for additional requirements. 

[1 0] See the Fact Sheet for the water treatment additives in use at Outfall 018 that have 

been reviewed and are approved for use at this facility by the Commissioner. In 

the event that changes are to be made in the use of water treatment additives 

including dosage rates contributing to Outfall 018, the permittee shall notify the 

Indiana Department of Environmental Management as required in Part II.C.1 of 

this permit. The use of any new or changed water treatment additives or dosage 

rates shall not cause the discharge from any permitted outfall to exhibit chronic or 

acute toxicity. Acute and chronic aquatic toxicity information must be provided 

with any notification regarding any new or changed water treatment additives or 

dosage rates. 

[11] See Part I.G. of the permit for Pollutant Minimization Requirements. 

[12] Bi-monthly monitoring shall be conducted in the months of February, April, June, 

August, October, and December of each year. 

[13] See Part LB. of the permit for the Narrative Water Quality Standards. 

[ 14] If oil and grease is measured in the effluent in significant quantities, the source of such discharge 

is to be investigated and eliminated. The facility is required to investigate and eliminate any 

significant or measured concentration of oil and grease (quantities in excess of 5 mg/1). The 

intent of this requirement is to assure that oil and grease is not added to once-through cooling 

water in measurable quantities (5 mg/1). 
Page 15 of 139 

Permit No. IN0000281 

[15] The following EPA test methods and/or Standard Methods and associated LODs and 

LOQs are to be used in the analysis of the effluent samples. Alternative methods may 

be used if first approved by IDEM. 

Parameter 

Mercury 

EPA Method 

1631, Revision E 

LOD 

0.2 ng/1 

LOQ 

0.5 ng/1 

[16] Annual average for the purpose of the mercury interim. discharge limit. 

[17] See Part IV of the permit for additional requirements related to the SMV. 
Parameter 

Page 16 of 139 

PermitNo.IN0000281 

8. During the period beginning on the effective date of this permit, the 

permittee is authorized to discharge blast furnace and sinter plant noncontact cooling water, storm water runoff, power station and No.2 Q-BOP 

non-contact cooling water, CWT plant brine regenerant, turbo boiler 

blowdown and steam condensate through Outfall 019 to the Grand 

Calumet River. Samples taken in compliance with the monitoring 

requirements below shall be taken at a point representative of the 

discharge but prior to entry into the Grand Calumet River. Such discharge 

shall be limited and monitored by the permittee as specified below: 

Quantity or Loading 

Monthly Daily 

DISCHARGE LIMITATIONS [1][9][11] 

Outfall 019 

Table 1 

Quality or Concentration 

Monthly Daily 

Average Maximum Average Maximum 

Monitoring Requirements 

Measurement Sample 

Frequency ~ 

Flow Report Report MGD Daily Continuous 

Oil & Grease [12][14] Report Report mg/1 1 X Weekly Grab 

Temperature [2] 

Free Cyanide [3] Report lbs/day 

Report OF 

Report mg/1 

2 X Weekly 6 Grabs/24-Hrs. 

1 X Monthly See Part LQ. 

Mercury [4][6][15][17] 

WQBEL's 0.00053 

Interim Discharge Limit[ 5] -------

0.0013 lbs/day 1.3 

3.2[16] 

3.2 ng/1 Bi-Monthly [10] Grab 

Report ng/1 Bi-Monthly [10] Grab 

Ammonia (as N) Report Report 

Report 

7.4 [7] 

lbs/day Report Report mg/1 2 X Monthly 24-Hr. Comp. 

Phenols ( 4AAP) Report lbs/day Report Report mg/1 1 X Monthly 24-Hr. Comp. 

Total Residual Chlorine [13] 3.3 lbs/day 8 18 ug/1 Daily [8] Grab 

Parameter 

pH 

Quality or Concentration 

Daily Daily 

Minimum Maximum 

6.0 9.0 

Units 

s.u. 

Table 2 

Monitoring Requirements 

Measurement Sample 

Frequency ~ 

1 X Weekly Grab 

[1] The permittee may discharge non-contact cooling waters from blast furnace and 

sintering operations only through Outfalls 015, 018, 019, and 035. 

[2] See Part III.A. ofthe permit for the Temperature Requirements. 

[3] Cyanide shall be measured and reported as Available (Free) Cyanide. See Part 

I.Q. for additional requirements. 

[4] The permittee shall measure and report identified metals as total recoverable 

metals. 

[5] For the term of the NPDES permit, the permittee is subject to the interim 

discharge limit developed under the provisions of 327IAC 5-3.5-8. Each 

reporting period (i.e., bi-monthly), the permittee shall report both a daily 

maximum value and an annual average value for mercury. The annual average 

value shall be calculated as the average of all daily values from the most recent 

twelve-month period. Reporting of the annual average value for mercury is not 
Page 17 of 139 

Permit No. IN0000281 

annual average value for mercury is not required during the first year of the 

permit term. Compliance with the interim discharge limit will be achieved when 

the average of daily values measured over the most recent (rolling) twelve-month 

period is less than the interim discharge limit. 

[ 6] The permittee applied for, and received, a variance from the water quality 

criterion used to establish the referenced mercury WQBELs under the streamlined 

mercury variance (SMV) procedures of327 lAC 5-3.5. Compliance with the 

interim discharge limit will demonstrate compliance with this permit. 

[7] Compliance with the daily maximum mass value will be demonstrated if the 

calculated mass value is less than 24.7 lbs/day. 

[8] Monitoring for TRC shall be 1 X Daily during zebra or quagga mussel intake 

chlorination, and continue for three additional days after zebra or quagga mussel 

treatment has been completed. See Part I.P. for Zebra and Quagga Mussel 

Control and Chlorination for additional requirements. 

[9] See the Fact Sheet for the water treatment additives in use at Outfall 019 that have 

been reviewed and are approved for use at this facility by the Commissioner. In 

the event that changes are to be made in the use of water treatment additives 

including dosage rates contributing to Outfall 019, the permittee shall notifY the 

Indiana Department of Environmental Management as required in Part II.C.1 of 

this permit. The use of any new or changed water treatment additives or dosage 

rates shall not cause the discharge from any pennitted outfall to exhibit chronic or 

acute toxicity. Acute and chronic aquatic toxicity information must be provided 

with any notification regarding any new or changed water treatment additives or 

dosage rates. 

[10] Bi-monthly monitoring shall be conducted in the months of February, April, June, 

August, October, and December of each year. 

[11] See Part LB. ofthe permit for the Narrative Water Quality Standards. 

[12] Additional monitoring and reporting requirements are contained in Part I.O., 

Visible Oil Corrective Action Monitoring Program. 

[13] See Part I.G. of the permit for Pollutant Minimization Requirements. 

[ 14] If oil and grease is measured in the effluent in significant quantities, the source of such discharge 

is to be investigated and eliminated. The facility is required to investigate and eliminate any 

significant or measured concentration of oil and grease (quantities in excess of 5 mg/1). The 

intent of this requirement is to assure that oil and grease is not added to once-through cooling 

water in measurable quantities (5 mg/1). 
Page 18 of 139 

Permit No. IN0000281 

[15] The following EPA test methods and/or Standard Methods and associated LODs and 

LOQs are to be used in the analysis of the effluent samples. Alternative methods may 

be used if first approved by IDEM. 

Parameter 

Mercury 

EPA Method 

1631, Revision E 

LOD 

0.2 ng/1 

LOQ 

0.5 ng/1 

[16] Annual average for the purpose of the mercury interim discharge limit. 

[17] See Part IV of the permit for additional requirements related to the SMV. 
Parameter 

Flow 

Page 19 of 139 

Permit No. IN0000281 

9. During the period beginning on the effective date of this permit, the 

permittee is authorized to discharge No. 1 BOP Shop non-contact cooling 

water, No.1 continuous caster non-contact cooling water, steam 

condensate, and storm water through Outfall 020 to the Grand Calumet 

River. Samples taken in compliance with the monitoring requirements 

below shall be taken at a point representative of the discharge but prior to 

entry into the Grand Calumet River. Such discharge shall be limited and 

monitored by the permittee as specified below: 

Quantity or Loading 

Monthly Daily 

DISCHARGE LIMITATIONS [1][9][11] 

Outfall 020 

Table 1 

Quality or Concentration 

Monthly Daily 

Average Maximum Units Average Maximum 

Report Report MGD 

Monitoring Requirements 

Measurement Sample 

Frequency ~ 

Daily Continuous 

Oil & Grease [2][13] 

Temperature [3] 

Lead [4] Report 

Report 

Report 

Report 

Report 

lbs/day Report 

Report mg/1 

Report oF 

Report mg/1 

1 X Weekly Grab 

2 X Weekly 6 Grabs/24-Hrs. 

2 X Monthly 24-Hr. Comp. 

Zinc [4] lbs/day Report Report mg/1 2 X Monthly 24-Hr. Comp. 

Mercury [4][6][14][16] 

WQBEL's 0.00087 0.0022 lbs/day 1.3 3.2 ng/1 Bi-Monthly [10] Grab 

Interim Discharge Limit[ 5] ------- 7.8[15] Report ng/1 Bi-Monthly [10] Grab 

Ammonia (as N) Report Report 

12 [7] 

lbs/day Report Report mg/1 2 X Monthly 24-Hr. Comp. 

Total Residual Chlorine [12] 5.4 lbs/day 8 18 ug/1 Daily [8] Grab 

Parameter 

pH 

Quality or Concentration 

Daily Daily 

Minimum Maximum 

6.0 9.0 

Units 

s.u. 

Table 2 

Monitoring Requirements 

Measurement Sample 

Frequency ~ 

1 X Weekly Grab 

[ 1] There shall be no discharge of any steelmaking area process wastewater 

(steelmaking, vacuum degassing and continuous casting) or other process 

wastewaters from Outfall 020. 

[2] Additional monitoring and reporting requirements are contained in Part I.O., 

Visible Oil Corrective Action Monitoring Program. 

[3] See Part liLA. of the permit for the Temperature Requirements. 

[ 4] The permittee shall measure and report identified metals as total recoverable 

metals. 

[5} For the term ofthe NPDES permit, the permittee is subject to the interim 

discharge limit developed under the provisions of 327 lAC 5-J.S-8. Each 

reporting period (i.e., bi-monthly), the permittee shall report both a daily 

maximum value and an annual average value for mercury. The annual average 

value shall be calculated as the average of all daily values from the most recent 

twelve-month period. Reporting of the annual average value for mercury is not 
Page 20 of 139 

Permit No. IN0000281 

required during the first year of the permit term. Compliance with the interim 

discharge limit will be achieved when the average of daily values measured over 

the most recent (rolling) twelve-month period is less than the interim discharge 

limit. 

[6] The permittee applied for, and received, a variance from the water quality 

criterion used to establish the referenced mercury WQBELs under the streamlined 

mercury variance (SMV) procedures of 327 IAC 5-3.5. Compliance with the 

interim discharge limit will demonstrate compliance with this permit. 

[7] Compliance with the daily maximum mass value will be demonstrated if the 

calculated mass value is less than 40.3 lbs/day. 

[8] Monitoring for TRC shall be 1 X Daily during zebra or quagga mussel intake 

chlorination, and continue for three additional days after zebra or quagga mussel 

treatment has been completed. See Part I.P. for Zebra and Quagga Mussel 

Control and Chlorination for additional requirements. 

[9] See the Fact Sheet for the water treatment additives in use at Outfall 020 that have 

been reviewed and are approved for use at this facility by the Commissioner. In 

the event that changes are to be made in the use of water treatment additives 

including dosage rates contributing to Outfall 020, the permittee shall notify the 

Indiana Department of Environmental Management as required in Part II. C.1 of 

this permit. The use of any new or changed water treatment additives or dosage 

rates shall not cause the discharge from any permitted outfall to exhibit chronic or 

acute toxicity. Acute and chronic aquatic toxicity information must be provided 

with any notification regarding any new or changed water treatment additives or 

dosage rates. 

[10] Bimonthly monitoring shall be conducted in the months ofFebruary, April, June, 

August, October, and December of each year. 

[11] See Part I.B. of the permit for the Narrative Water Quality Standards. 

[12] See Part I. G. of the permit for Pollutant Minimization Requirements. 

[13] If oil and grease is measured in the effluent in significant quantities, the source of such discharge 

is to be investigated and eliminated. The facility is required to investigate and eliminate any 

significant or measured concentration of oil and grease (quantities in excess of 5 mg/1). The 

intent of this requirement is to assure that oil and grease is not added to once-through cooling 

water in measurable quantities (5 mg/1). 

[14] The following EPA test methods and/or Standard Methods and associated LODs and 

LOQs areto be used in the analysis of the effluent samples. Alternative methods may 

be used if first approved by IDEM. 
Parameter 

Mercury 

EPA Method 

1631, Revision E 

LOD 

0.2 ng/1 

Page 21 of 139 

Pennit No. IN0000281 

LOQ 

0.5 ng/1 

[ 15] Annual average for the purpose of the mercury interim discharge limit. 

[16] See Part IV of the permit for additional requirements related to the SMV. 
Parameter 

Flow 

Oil & Grease 

Page 22 of 139 

Permit No. IN0000281 

10. During the period beginning on the effective date of this permit, the 

permittee is authorized to discharge air compressor cooling water, air 

conditioning condensates, steam condensate, and stonn water runoff 

through Outfall 021 to the Grand Calumet River. Samples taken in 

compliance with the monitoring requirements below shall be taken at a 

point representative of the discharge but prior to entry into the Grand 

Calmnet River. Such discharge shall be limited and monitored by the 

permittee as specified below: 

Quantity or Loading 

Monthly Daily 

DISCHARGE LIMITATIONS [1][4][5] 

Outfall 021 

Table I 

Quality or Concentration 

Monthly Daily 

Average Maximum Units Average Maximum 

Report Report MGD 

Monitoring Requirements 

Measurement Sample 

Frequency ~ 

Total Residual Chlorine [6] 0.040 0.090 [2] 

Report 

lbs/day 8 

lba/day Report 

Report 

18 

Report 

mg/1 

ug/1 

ug/1 

1 X Monthly 

1 X Monthly 

Daily [3] 

2XMonthly 

Estimate 

Grab 

Grab 

Ammonia (as N) Report Grab 

Parameter 

pH 

Quality or Concentration 

Daily Daily 

Minimum Maximum 

6.0 9.0 

Units 

s.u. 

Table 2 

Monitoring Requirements 

Measurement Sample 

Frequency ~ 

1 X Monthly Grab 

[1] There shall be no discharge of process wastewaters through this outfall. 

[2] Compliance with the daily maximmn mass value will be demonstrated if the 

calculated mass value is less than 0.3 lbs/day. 

[3] Monitoring for TRC shall be 1 X Daily during zebra or quagga mussel intake 

chlorination, and continue for three additional days after zebra or quagga mussel 

treatment has been completed. See Part I.P. for Zebra and Quagga Mussel 

Control and Chlorination for additional requirements. 

[ 4] See the Fact Sheet for the water treatment additives in use at Outfall 021 that have 

been reviewed and are approved for use at this facility by the Commissioner. In 

the event that changes are to be made in the use of water treatment additives 

including dosage rates contributing to Outfall 021, the permittee shall notify the 

Indiana Department of Environmental Management as required in Part ILC.1 of 

this permit. The use of any new or changed water treatment additives or dosage 

rates shall not cause the discharge from any permitted outfall to exhibit chronic or 

acute toxicity. Acute and chronic aquatic toxicity information must be provided 

with any notification regarding any new or changed water treatment additives or 

dosage rates. 

[5] See Part LB. of the permit forthe Narrative Water Quality Standards. 
Page 23 of 139 

Permit No. IN0000281 

[6] See Part I.G. of the pennit for Pollutant Minimization Requirements. 
Parameter 

Flow 

Oil & Grease 

Ammonia (as N) 

Parameter 

pH 

Page 24 of 139 

Permit No. IN0000281 

11. During the period beginning on the effective date of this permit, the 

permittee is authorized to discharge air conditioning and steam 

condensates and stom1 water runoff through Outfall 023 to the Grand 

Calumet River. Samples taken in compliance with the monitoring 

requirements below shall be taken at a point representative of the 

discharge but prior to entry into the Grand Calumet River. Such discharge 

shall be limited and monitored by the permittee as specified below: 

DISCHARGE LIMITATIONS [1][2][3] 

Outfall 023 

Table 1 

Quantity or Loading Quality or Concentration 

Monthly Daily Monthly Daily 

Average Maximum Units Average Maximum 

Report Report MGD 

Report 

Report Report lbs/day Report Report 

Table 2 

Quality or Concentration 

Daily Daily 

Minimum Maximum Units 

6.0 9.0 s.u. 

Units 

mg/l 

ug/1 

[1] There shall be no discharge of process wastewaters through this outfall. 

Monitoring 

Measurement 

Frequency 

1 X Monthly 

1 X Monthly 

2XMonthly 

Monitoring 

Measurement 

Frequency 

1 X Monthly 

[2] See the Fact Sheet for the water treatment additives in use at Outfall 023 that have 

been reviewed and are approved for use at this facility by the Commissioner. In 

the event that changes are to be made in the use of water treatment additives 

including dosage rates contributing to Outfall 023, the permittee shall notify the 

Indiana Department ofEnviromnental Management as required in Part II.C.l of 

this permit. The use of any new or changed water treatment additives or dosage 

rates shall not cause the discharge from any permitted outfall to exhibit chronic or 

acute toxicity. Acute and chronic aquatic toxicity information must be provided 

with any notification regarding any new or changed water treatment additives or 

dosage rates. 

[3] See Part LB. of the permit for the Narrative Water Quality Standards. 

Requirements 

Sample 

~ 

Estimate 

Grab 

Grab 

Requirements 

Sample 

~ 

Grab 
Parameter 

Flow 

Oil & Grease 

Parameter 

pH 

[1] 

[2] 

[3] 

Page 25 of 139 

Permit No. IN0000281 

14. During the period beginning on the effective date of this permit, the 

pennittee is authorized to discharge air conditioning and steam 

condensates, and storm water runoff through Outfall 026 to the Grand 

Calumet River. Samples taken in compliance with the monitoring 

requirements below shall be taken at a point representative of the 

discharge but prior to entry into the Grand Calumet River. Such discharge 

shall be limited and monitored by the permittee as specified below: 

DISCHARGE LIMITATIONS [1][2][3] 

Outfall 026 (Inactive) 

Table I 

Quantity or Loading Quality or Concentration 

Monthly Daily Monthly Daily 

Average Maximum Units Average Maximum 

Report Report MGD 

Report 

Table 2 

Quality or Concentration 

Daily Daily 

Minimum Maximum Units 

6.0 9.0 s.u. 

Monitoring 

Measurement 

Units Frequency 

I X Monthly 

mg/1 I X Monthly 

Monitoring 

Measurement 

Frequency 

I X Monthly 

US Steel shall notify the Compliance Evaluation Section of the Office of Water 

Quality (OWQ) at least 30 days prior to re-activation of this outfall. 

See Part LB. of the permit for the Narrative Water Quality Standards. 

There shall be no discharge of process wastewaters through this outfall. 

Requirements 

Sample 

Ivru< 

Estimate 

Grab 

Requirements 

Sample 

Ivru< 

Grab 
Flow 

Page 26 of 139 

Permit No. IN0000281 

15. During the period begi1ming on the effective date of this permit, the 

permittee is authorized to discharge treated wastewater from steelmaking, 

vacuum degassing, continuous casting and hot forming process 

wastewaters (Internal Outfall603), storm water runoff, non-contact 

cooling water and direct contact slab cooling water through Outfalls 028 

and 030 to the Grand Calumet River. The permittee is authorized to 

discharge from Outfalls 028 & 030 (combined total) and reported as 

Outfall 600 to the Grand Calumet River. Samples taken in compliance 

with the monitoring requirements below shall be taken at a point 

representative of the discharge but prior to entry into the Grand Calumet 

River. Such discharge shall be limited and monitored by the permittee as 

specified below: 

Quantity or Loading 

Monthly Daily 

DISCHARGE LIMITATIONS [1][9][11] 

028/030 (Outfall 600) 

Table 1 

Quality or Concentration 

Monthly Daily 

A ventge Maximum Units Average Maximum 

MGD 

Monitoring Requirements 

Measurement Sample 

Frequency I.YQ.~ 

Daily 

Total Suspended Solids 

Oil & Grease [4] 

Report 

2,038 

1,274 

Report 

5,933 

2,807 

lbs/day Report 

lbs/day Report 

Report 

Report 

mg/1 

mg/1 

mg/1 

mg/1 

5 X Weekly 

5X Weekly 

2X Weekly 

1 X Weekly 

Continuous 

24-Hr. Comp. 

3 Grabs/ 24 Hrs 

24-Hr. Comp. 

24-lir. Comp. 

Lead [3] 6.1 

Zinc [3] Report 

Mercury [3][5][13] 

Final 0.00031 

Interim Discharge Limit [10] ------

Ammonia (as N) Report 

Fluoride Report 

Total Residual Chlorine !12] 1.9 

Temperature [2] -----------

Whole Eftluent Toxicity 

12 

Report 

0.00075 

Report 

Report 

4.2 [6] 

Quality or Concentraticm 

Parameter 

pH 

Daily D:,:ly 

Minimum :Y!aximum 

6.0 9.0 

lbs/day 0.026 

lbs/day Report 

lbs/day 1.3 

[14] 

lbs/day Report 

lbs/day Report 

lbs/day 8 

0.052 

Report 

3.2 

Report 

Report 

Report 

18 

ng/1 

ng/1 

mg/1 

mg/1 

ug/1 

Bi-Monthly [8] Grab 

Bi-Monthly [8] Grab 

1 X Weekly 24-Hr. Comp. 

1 X Weekly 24-J-lr. Comp. 

Daily [7] Grab 

----------- ---------- Report °F 2 X Weekly 6 Grab.o/, ~-Hrs. 

See Part l.L., Biomonitoring Requirements 

Units 

s.u. 

Table 2 

Quarterly 24-Hr. Comp. 

Monitoring Requirements 

Measurement Sample 

Frequency Ivru< 

1 X Weekly Grab 

[1] The permittee shall measure on the same day and at the same time and report 

Outfalls 028 and 030 separately and also report as a combined total (Outfall 600). 

[2] See Part III.A. of the permit for the Temperature Requirements. 

[3] The permittee shall measure and report identified metals as total recoverable 

metals. 

[4] Additional monitoring and reporting requirements are contained in Part 1.0., 

Visible Oil Corrective Action Monitoring Program. 
Page 27 of 139 

Permit No. IN00002Sl 

[5] The permittee applied for, and received, a variance from the water quality criterion used to 

establish the referenced mercury WQBELs under the streamlined mercury variance (SMV) 

procedures of327 lAC 5-3.5. Compliance with the interim discharge limit will demonstrate 

compliance with this permit. See Part IV of the permit for additional requirements related 

to the SMV. 

[ 6] Compliance with the daily maximum mass value will be demonstrated if the 

calculated mass value is less than 14.1 lbs/day. 

[7] Monitoring for TRC shall be 1 X Daily during zebra or quagga mussel intake 

chlorination, and continue for three additional days after zebra or quagga mussel 

treatment has completed. See Part I.P. for Zebra and Quagga Mussel Control and 

Chlorination for additional requirements. 

[8] Bi-monthly monitoring shall be conducted in the months of February, April, June, 

August, October, and December of each year. 

[9] See the Fact Sheet for the water treatment additives in use at Outfall 028/030 that 

have been reviewed and are approved for use at this facility by the Commissioner. 

In the event that changes are to be made in the use of water treatment additives 

including dosage rates contributing to Outfall 028/030, the permittee shall notify 

the Indiana Department of Environmental Management as required in Part II. C.1 

of this permit. The use of any new or changed water treatment additives or 

dosage rates shall not cause the discharge from any permitted outfall to exhibit 

chronic or acute toxicity. Acute and chronic aquatic toxicity information must be 

provided with any notification regarding any new or changed water treatment 

additives or dosage rates. 

[10] For the term of the NPDES permit, the permittee is subject to the interim 

discharge limit developed under the provisions of 327 lAC 5-3.5-8. Each 

reporting period (i.e., bi-monthly), the permittee shall report both a daily 

maximum value and an annual average value for mercury. The annual average 

value shall be calculated as the average of all daily values from the most recent 

twelve-month period. Reporting of the annual average value for mercury is not 

required during the first year of the permit term. Compliance with the interim 

discharge limit will be achieved when the average of daily values measured over 

the most recent (rolling) twelve-month period is less than the interim discharge 

limit. 

[11] See Part LB. of the permit for the Narrative Water Quality Standards. 

[12] See Part I.G. of the permit for Pollutant Minimization Requirements. 

[13] The following EPA test methods and/or Standard Methods and associated LODs and 

LOQs are to be used in the analysis of the effluent samples. Alternative methods may 

be used if first approved by IDEM. 
Parameter 

Mercury 

[14] Outfall 028: 

Outfall 030: 

EPA Method 

1631, Revision E 

LOD 

0.2 ng/1 

Page 28 of 139 

Permit No. IN0000281 

LOQ 

0.5 ng/1 

2.8 ng/1 Annual average for the purpose of the mercury interim 

discharge limit. 

3.0 ng/1 Annual average for the purpose of the mercury interim 

discharge limit. 
Parameter 

Flow 

Lead [2] 

Zinc [2] 

Page 29 of 139 

Permit No. IN0000281 

16. During the period beginning on the effective date ofthis permit, the 

permittee is authorized to discharge BOP (I-BOP and Q-BOP) treatment, 

vacuum degasser and continuous casting (1-Caster, 2-Caster AlB line, and 

2-Caster C Line) treatment wastewater through Outfall 603 to the Grand 

Calumet River via Outfall 028/030. Samples taken in compliance with the 

monitoring requirements below shall be taken at a point representative of 

the discharge but prior to commingling with any other process or nonprocess waters. Such discharge shall be limited and monitored by the 

permittee as specified below: 

Quantity or Loading 

Monthly Daily 

Average Maximum 

DISCHARGE LIMITATIONS [1] 

Internal Outfall 603 

Quality or Concentration 

Monthly Daily 

Units Average Maximum 

Report 

Report 

11.88 

Report MGD 

Report lbs/day Report Report 

36.38 lbs/day Report Report 

Report 

Report 

mg/1 

mg/1 

Monitoring Requirements 

Measurement Sample 

Frequency ~ 

Daily Continuous 

2 X Weekly[3] 24-Hr. Comp. 

2 X Weekly[3] 24-Hr. Comp. 

[1] Samples taken in compliance with the monitoring requirements above shall be 

taken at a point representative of the discharge but prior to entry into Outfalls 

028/030. Separate samples and flow measurements shall be taken at the discharge 

of the No.1 Continuous Caster Scale Pit, the filtered blowdown from the No.2 

Continuous Caster, and the discharge of the No.1 and No.lA BOP Thickeners. 

The mass loadings from each monitoring point shall be calculated and added 

together to determine the daily and monthly average mass discharges. 

[2] The permittee shall measure and report identified metals as total recoverable 

metals. 

[3] Sampling at 603 for lead and zinc shall occur on the same day and at 

approximately at the same time as the sample taken at Outfalls 028 and 030. 
Parameter 

Flow 

Oil & Grease 

Page 30 of 139 

Permit No. IN0000281 

17. During the period beginning on the effective date of this permit, the 

permittee is authorized to discharge miscellaneous non-contact cooling 

water, steam condensate, freeze protection water, and storm water through 

Outfall 032 to the Grand Calumet River. Samples taken in compliance 

with the monitoring requirements below shall be taken at a point 

representative of the discharge but prior to entry into the Grand Calumet 

River. Such discharge shall be limited and monitored by the permittee as 

specified below: 

Quantity or Loading 

Monthly Daily 

DISCHARGE LIMITATIONS [3)[4) 

Outfall 032 

Table 1 

Quality or Concentration 

Monthly Daily 

Average Maximum Units Average Maximum 

Report Report MGD 

Monitoring Requirements 

Measurement Sample 

Frequency ~ 

Total Residual Chlorine [5] 0.020 0.045 [1] 

Report 

Jbs/day 8 

lbs/day Report 

Report 

18 

Report 

mg/1 

ug/1 

mg/1 

1 X Monthly 

1 X Monthly 

Daily [2] 

Estimate 

Grab 

Grab 

Ammonia (as N) Report 1 X Weekly 24-Hr. Comp. 

Parameter 

pH 

Quality or Concentration 

Daily Daily 

Minimum Maximum 

6.0 9.0 

Units 

s.u. 

Table 2 

Monitoring 

Measurement 

Frequency 

1 X Monthly 

[1] Compliance with the daily maximum mass value will be demonstrated if the 

calculated mass value is less than 0.15 lbs/day. 

Requirements 

Sample 

Tvpe 

Grab 

[2] Monitoring for TRC shall be 1 X Daily during zebra or quagga mussel intake 

chlorination, and continue for three additional days after zebra or quagga mussel 

treatment has completed. See Part I.P. for Zebra and. Quagga Mussel Control and 

Chlorination for additional requirements. 

[3] See the Fact Sheet for the water treatment additives in use at Outfall 032 that have 

been reviewed and are approved for use at this facility by the Commissioner. In 

the event that changes are to be made in the use of water treatment additives 

including dosage rates contributing to Outfall 032, the permittee shall notify the 

Indiana Department of Environmental Management as required in Part II.C.1 of 

this permit. The use of any new or changed water treatment additives or dosage 

rates shall not cause the discharge from any permitted outfall to exhibit chronic or 

acute toxicity. Acute and chronic aquatic toxicity information must be provided 

with any notification regarding any new or changed water treatment additives or 

dosage rates. 

[4] See Part LB. of the permit for the Narrative Water Quality Standards. 

[5] See Part I.G. of the permit for Pollutant Minimization Requirements. 
Parameter 

Page 31 of139 

Permit No. IN0000281 

18. During the period beginning on the effective date of this permit, the 

permittee is authorized to discharge non-contact cooling water from sheet 

and tin mills and the atmospheric gas plant, non-process wastewater from 

Railroad Kirk Yard, steam condensate, and storm water through Outfall 

033 to the Grand Calumet River. Samples taken in compliance with the 

monitoring requirements below shall be taken at a point representative of 

the discharge but prior to entry into the Grand Calumet River. Such 

discharge shall be limited and monitored by the permittee as specified 

below: 

Quantity or Loading 

Monthly Daily 

DISCHARGE LIMITATIONS [1][5][6] 

Outfall 033 

Table 1 

Quality or Concentration 

Monthly Daily 

Average Maximum Units Average Maximum 

Monitoring Requirements 

Measurement Sample 

F reguency IYill;_ 

Flow Report Report MGD 1 X Monthly 

1 X Monthly 

1 X Monthly 

2 X Monthly 

Daily [4] 

Estimate 

Oil & Grease Grab [2] 

Phenols (4AAP) lbs/day 

Ammonia (as N) Report 

Report 

Report 

0.030 [3] 

lbs/day Report 

Report 

Report 

Report 

mg/1 

mg/1 

mg/1 

ug/1 

24-Hr. Comp. 

24-Hr. Comp. 

Total Residual Chlorine Grab [7] 0.013 lbs/day 8 18 

Parameter 

pH 

Quality or Concentration 

Daily Daily 

Minimum Maximum 

6.0 9.0 

Units 

s.u. 

Table 2 

Monitoring Requirements 

Measurement Sample 

Frequency IYill;_ 

1 X Monthly Grab 

[1] There shall be no discharge of process wastewaters through Outfall 033. 

[2] Additional monitoring and reporting requirements are contained in Part I.O., 

Visible Oil Corrective Action Monitoring Program. 

[3] Compliance with the daily maximum mass value will be demonstrated if the 

calculated mass value is less than 0.1 lbs/day. 

[4] Monitoring for TRC shall be 1 X Daily during zebra or quagga mussel intake 

chlorination, and continue for three additional days after zebra or quagga mussel 

treatment has completed. See Part I.P. for Zebra and Quagga Mussel Control and 

Chlorination for additional requirements. 

[5] See the Fact Sheet for the water treatment additives in use at Outfall 033 that have 

been reviewed and are approved for use at this facility by the Commissioner. In 

the event that changes are to be made in the use of water treatment additives 

including dosage rates contributing to Outfall 033, the permittee shall notify the 

Indiana Department of Environmental Management as required in Part II.C.1 of 

this permit. The use of any new or changed water treatment additives or dosage 

rates shall not cause the discharge from any pem1itted outfall to exhibit chronic or 
Page 32 of 139 

Permit No. IN0000281 

acute toxicity. Acute and chronic aquatic toxicity information must be provided 

with any notification regarding any new or changed water treatment additives or 

dosage rates. 

[6] See Part LB. of the permit for the Narrative Water Quality Standards. 

[7] See Part I.G. of the permit for Pollutant Minimization Requirements. 
Parameter 

Flow 

CBOD5 [4] 

Summer 

Winter 

Oil & Grease [ 5] 

Total Suspended Solids 

Ammonia (as N) 

Lead [8] 

Zinc [8] 

Copper [8] 

Cadmium [8] 

Nickel [8] 

Silver [8] 

Total Chromium [8] 

Mercury [8][11][17] 

Final 

Page 33 of 139 

Permit No. IN0000281 

19. During the period beginning on the effective date of this permit, the 

permittee is authorized to discharge treated wastewater from Internal 

Outfalls, 604, 605, and 606, non-contact cooling water from the finishing 

operations, non-contact cooling water from the ferrous chloride recycling 

discharge, steam condensate, and storm water runoff through Outfall 034 

to the Grand Calumet River. Samples taken in compliance with the 

monitoring requirements below shall be taken at a point representative of 

the discharge but prior to entry into the Grand Calumet River. Such 

discharge shall be limited and monitored by the permittee as specified 

below: 

DISCHARGE LIMITATIONS [1][2][6][10][13] 

Outfall 034 

Table 1 

Quantity or Loading Quality or Concentration Monitoring Requirements 

Monthly Daily Monthly Daily Measurement Sample 

Average Maximum Units Average Maximum Frequency ~ 

Report Report MGD Daily Continuous 

1,334 2,669 lbs/day Report Report mg/1 2 X Weekly 24-Hr. Comp. 

4,537 9,074 lbs/day Report Report mg/1 2XWeekly 24-Hr. Comp. 

1,430 3,660 lbs/day Report Report mg/1 5 X Weekly 3 Grabs/ 24 Hrs. 

Report Report lbs/day Report Report mg/1 2 X Weekly 24-Hr. Comp. 

Report Report lbs/day Report Report mg/1 2XWeekly 24-Hr. Comp. 

2.52 5.85 lbs/day Report Report mg/1 2XWeekly 24-Hr. Comp. 

Report Report lbs/day Report Report mg/1 2XWeekly 24-Hr. Comp. 

3.8 8.7 lbs/day 0.018 0.041 mg/1 2 X Weekly 24-Hr. Comp. 

2.3 3.4 lbs/day 0.011 0.016 mg/1 1 X Monthly 24-Hr. Comp. 

Report Report lbs/day Report Report mg/1 1 X Quarterly[l5] 24-Hr. Comp. 

0.042 0.072 lbs/day 0.20 0.34 ug/1 2XMonthly 24-Hr. Comp. 

Report Report lbs/day Report Report mg/1 2 X Weekly 24-Hr. Comp. 

0.00028 0.00068 lbs/day 1.3 3.2 ng/1 Bi-Monthly [14] Grab 

Interim Discharge Limit [12] ------ 2.5 [18] Report ng/1 Bi-Monthly [14] Grab 

Phenols ( 4AAP) 26.00 39.00 lbs/day Report Report mg/1 1 X Weekly 24-Hr. Comp. 

Total Residual Chlorine 1.7 3.8 [9] lbs/day 8 18 ug/1 See Footnote [7] Grab 

Temperature [3] ----------- ----------- ----------- ---------- Report OF 2 X Weekly 6 Grabs/24-Hrs. 

Whole Effluent Toxicity [16] ------ 3.6 TUc Quarterly [15] 24-Hr. Comp. 

Parameter 

pH 

Dissolved Oxygen 

[1] 

[2] 

[3] 

Table 2 

Quality or Concentration Monitoring Requirements 

Daily Daily Measurement 

Minimum Maximum Units Frequency 

6.0 9.0 s.u. 1X Daily 

5.0 mg/1 1 X Weekly 

The permittee shall only discharge the effluents from Internal Outfalls 604, 605, 

and 606 through Outfall 034. 

The permittee shall monitor Outfalls 034, 604, 605, and 606 on the same days. 

See Part III.A. ofthe permit for the Temperature Requirements. 

Sample 

~ 

Grab 

Grab 
Page 34 of 139 

Permit No. IN0000281 

[4] Summer limitations apply from July 1 through September 30. Winter limitations 

apply from October 1 through June 30. 

[5] Additional monitoring and reporting requirements are contained in Part I.O., 

Visible Oil Corrective Action Monitoring Program. 

[6] The following wastewater treatment systems may be added to reduce the CBOD5 

on a continuous year-round basis: 

(i) Internal Outfall604- Chlorination (sodium hypochlorite) treatment. 

(ii) Internal Outfall605- Chlorination (sodium hypochlorite) treatment. 

(iii) Outfall 034- Sodium Bisulfite addition (de-chlorination). 

[7] Continuous chlorination at the above outfalls is permitted on a year-round basis. 

The wastewater shall be de-chlorinated prior to discharge from Outfall 034. 

Monitoring for TRC shall be daily during zebra or quagga mussel intake 

chlorination, and 2 X Weekly during continuous chlorination treatment when the 

intake is not being treated for zebra mussels. See Part I.P. for Zebra and Quagga 

Mussel Control and Chlorination for additional requirements. 

[8] The permittee shall measure and report identified metals as total recoverable 

metals. 

[9] Compliance with the daily maximum mass value will be demonstrated if the 

calculated mass value is less than 12.7lbs/day. 

[10] See Part LB. ofthe permit for the Narrative Water Quality Standards. 

[11] The permittee applied for, and received, a variance from the water quality criterion used to 

establish the referenced mercury WQBELs under the streamlined mercury variance (SMV) 

procedures of327 lAC 5-3.5. Compliance with the interim discharge limit will demonstrate 

compliance with this permit. See Part IV of the permit for additional requirements related 

to the SMV. 

[12] For the term of the NPDES permit, the permittee is subject to the interim 

discharge limit developed under the provisions of 327 lAC 5-3.5-8. Each 

reporting period (i.e., bi-monthly), the permittee shall report both a daily 

maximum value and an annual average value for mercury. The annual average 

value shall be calculated as the average of all daily values from the most recent 

twelve-month period. Reporting of the annual average value for mercury is not 

required during the first year of the permit term. Compliance with the interim 

discharge limit will be achieved when the average of daily values measured over 

the most recent (rolling) twelve-month period is less than the interim discharge 

limit. 
Page 35 of 139 

Permit No. IN0000281 

[13] See the Fact Sheet for the water treatment additives in use at Outfall 034 that have 

been reviewed and are approved for use at this facility by the Commissioner. In 

the event that changes are to be made in the use of water treatment additives 

including dosage rates contributing to Outfall 034, the permittee shall notifY the 

Indiana Department ofEnvironmental Management as required in Part ILC.1 of 

this permit. The use of any new or changed water treatment additives or dosage 

rates shall not cause the discharge from any permitted outfall to exhibit chronic or 

acute toxicity. Acute and chronic aquatic toxicity information must be provided 

with any notit!cation regarding any new or changed water treatment additives or 

dosage rates. 

[14] Bi-monthly monitoring shall be conducted in the months of February, April, June, 

August, October, and December of each year. 

[15] Samples shall be taken once at any time during each of the four annual quarters: 

(A) January-February-March; 

(B) April-May-June; 

(C) July-August-September; and 

(D) October-November-December. 

For quarterly monitoring, in the first quarter for example, the permittee may 

conduct sampling within the month of January, February or March. The result 

from this reporting timeframe shall be reported on the March DMR, regardless of 

which of the months within the quarter the sample was taken. 

[16] See Part LL. of the permit for Biomonitoring Requirements. 

[17] The following EPA test methods and/or Standard Methods and associated LODs and 

LOQs are to be used in the analysis ofthe effluent samples. Alternative methods may 

be used if first approved by IDEM. 

Parameter 

Mercury 

EPA Method 

1631, Revision E 

LOD 

0.2 ng/1 

LOQ 

0.5 ng/1 

[ 18] Annual average for the purpose of the mercury interim discharge limit. 
Parameter 

Flow 

Page 36 of 139 

Permit No. IN0000281 

20. During the period beginning on the effective date of this pennit, the 

permittee is authorized to discharge treated process wastewaters from cold 

rolling, acid pickling, alkaline cleaning, hot coating, electroplating, and 

hot strip mill oil cellars through Internal Outfall 604 to the Grand Calumet 

River via Outfall 034. Samples taken in compliance with the monitoring 

requirements below shall be taken at a point representative of the 

discharge but prior to commingling with any other process or non-process 

waters. Such discharge shall be limited and monitored by the permittee as 

specified below: 

DISCHARGE LIMITATIONS [1][2] 

Outfall604 

Quantity or Loading Quality or Concentration Monitoring Requirements 

Monthly Daily Monthly Daily Measurement Sample 

Average Maximum Units Average Maximum Units Frequency ~ 

Report Report MGD Daily Continuous 

Total Suspended Solids 2,901 6,455 lbs/day Report Report mg/1 2 X Weekly 24-Hr. Comp. 

Oil & Grease Report Report lbs/day Report Report mg/1 5 X Weekly 3 Grabs/ 24 Hrs. 

Total Recov~rable Chromium[4] 28.25 45.77 lbs/day Report Report mg/1 2 X Weekly 24-Hr. Comp. 

Zinc [4] 33.42 70.00 lbs/day Report Report mg/1 2 X Weekly 24-Hr. Comp. 

Lead [4] Report Report lbs/day Report Report mg/1 2 X Weekly 24-Hr. Comp. 

Total Cyanide [3] 10.74 19.83 lbs/day Report Report mg/1 1 X Quarterly [7] See Part I.Q. 

Cadmium [4] Report Report lbs/day Report Report mg/1 1 X Quarterly [7] 24-Hr. Comp. 

Hexavalent Chromium [6][8] 0.15 0.46 lbs/day Report Report mg/1 1 X Weekly Grab 

Copper [4] 

Nickel [4] 

Silver [4] 

TTO [5] 

Naphthalene 

Tetrachloroethylene 

Report Report lbs/day Report Report mg/1 2 X Weekly 24-Hr. Comp. 

39.32 65.76 lbs/day Report Report mg/1 1 X Quarterly [7] 24-Hr. Comp. 

Report Report lbs/day Report Report mg/1 2 X Monthly 

35.19 lbs/day 1 X Monthly 

1.68 lbs/day Report mg/1 2X Weekly 

2.51 lbs/day Report mg/1 2 X Weekly 

[1] Bypasses of process wastewaters from the above sources around the Terminal 

Treatment Plant are permiHed only in accordance with Section B.2., Part II of this 

permit. The permittee shall not use cyanide plating solutions in any metal 

finishing operations, unless expressly authorized by a modification of this permit. 

[2] Samples taken in accordance with the monitoring requirements above shall be 

taken at a point representative ofthe discharge but prior to entry into Outfall 034. 

[3] Cyanide shall be measured and reported as Total Cyanide. See Part LQ. for 

additional requirements. 

[ 4] The permittee shall measure and report the identified metals a total recoverable 

metals. 

[5] The limitation for TTO (Total Toxic Organics) applies to the summation of all 

quantifiable values greater than 0.01 mg/1 for all toxic organics listed under 40 

CFR 433.11(e) which are reasonably expected to be present. This is a federal 

effluent guideline based limitation and is not an authorization to discharge toxic 

organic compounds at levels which cause or may cause water quality violations. 

24-Hr. Comp. 

24-Hr. Comp. 

24-Hr. Comp. 

2 Grabs/ 24 Hrs. 
Page 37 of 139 

Permit No. IN0000281 

The discharge of organic compounds at level which cause or may cause water 

quality violations is prohibited. The intent of this limitation is to assure that any 

solvent or other products in use at the plant, which contain any of the listed toxic 

organic compounds, are disposed of properly, and not dumped, spilled, discharged 

or leaked. 

Certification Statement 

In lieu of monthly monitoring for TTO, the party responsible for signing the 

monthly discharge monitoring report (DMR) forms may make the following 

statement, as part of the DMR: "Based on my inquiry of the persons directly 

responsible for managing compliance with the permit limitations for TTO, I 

certify that, to the best of my knowledge and belief, no disposal of concentrated 

toxic organics into the wastewaters has occurred since filing of the last discharge 

monitoring report. I further certify that this facility is implementing the Toxic 

Organic Pollutant Management Plan submitted to the Compliance Evaluation 

Section of the Office of Water Quality, as required by this permit." The 

Certification Statement may not be used until completion of the Toxic Organic 

Pollutant Management Plan required by Part LN. of this permit. 

If the above mentioned responsible party is unable to make the above 

Certification Statement because of discharge or spills of any TTO compounds, the 

Permittee is required to notify IDEM in accordance with Part II.C.3 of this permit. 

[ 6] Hexavalent Chromium shall be measured and reported as dissolved metal. The 

Hexavalent Chromium sample type shall be grab method. The maximum holding 

time for a Hexavalent Chromium sample is 24 hours (40 CFR 136.6 Table IB). 

Therefore, the grab sample must be analyzed within 24 hours. 

[7] Samples shall be taken once at any time during each of the four annual quarters: 

(A) January-February-March; 

(B) April-May-June; 

(C) July-August-September; and 

(D) October-November-December. 

For quarterly monitoring, in the first quarter for example, the permittee may 

conduct sampling within the month of January, February or March. The result 

from this reporting timeframe shall be reported on the March DMR, regardless of 

which of the months within the quarter the sample was taken. 

[8] For purposes of calculating the monthly average mass, loadings to be reported on 

the DMR forms, concentration values below the limit of quantitation (LOQ) of 

0.94 ug/1 may be assigned a value of zero for purposes of calculating the monthly 

average mass limit. 
Parameter 

Flow 

Page 38 of 139 

Permit No. IN0000281 

21. During the period beginning on the effective date of this permit, the 

permittee is authorized to discharge treated process wastewaters from the 

84" Hot Strip Mill through Internal Outfall 605 to the Grand Calumet 

River via Outfall 034. Samples taken in compliance with the monitoring 

requirements below shall be taken at a point representative of the 

discharge but prior to commingling with any other process or non-process 

waters. Such discharge shall be limited and monitored by the permittee as 

specified below: 

Quantity or Loading 

Monthly Daily 

Average Maximum 

DISCHARGE LIMITATIONS [1] 

Outfall605 

Quality or Concentration 

Monthly Daily 

Average Maximum 

MGD 

Monitoring 

Measurement 

Frequency 

Daily 

Total Suspended Solids 

Oil & Grease 

Report 

725 

Report 

Report 

2,175 

1,450 

lbs/day Report 

lbs/day 

Report 

Report 

mg/1 

mg/1 

2 X Weekly 

5 X Weekly 

[1] The permittee may discharge process wastewater from the 84" Hot Strip Mill only 

through Outfall605, and oil cellar discharges through Outfal1604 (Terminal 

Treatment Plant). Non-contact cooling water from the 84" Hot Strip Mill shall 

only be discharged through Outfall 039. 

Requirements 

Sample 

~ 

Continuous 

24-Hr. Comp. 

3 Grab/ 24-Hrs 
Parameter 

Flow 

Oil & Grease 

Total Chromium 

Zinc [4] 

Lead [4] 

Phenols (4AAP) 

Page 39 of 139 

Permit No. IN0000281 

22. During the period beginning on the effective date of this permit, the 

permittee is authorized to discharge non-contact cooling water from steel 

finishing operations, miscellaneous non-process wastewater, and storm 

water runoff through Internal Outfall 606 to the Grand Calumet River via 

Outfall 034. Samples taken in compliance with the monitoring 

requirements below shall be taken at a point representative of the 

discharge but prior to commingling with other process or non-process 

waters. Such discharge shall be limited and monitored by the permittee as 

specified below: 

Quantity or Loading 

Monthly Daily 

DISCHARGE LIMITATIONS [1][2][3] 

Outfall606 

Quality or Concentration 

Monthly Daily 

Average Maximum Units Average Maximum 

Report Report MGD 

Report 

Report 

Report 

Report 

Report 

Monitoring 

Measurement 

Units Freguency 

Daily 

mg/1 1 X Weekly 

mg/1 1 X Monthly 

mg/1 l X Monthly 

mg/1 1 X Monthly 

mg/1 1 X Monthly 

[1] The permittee may discharge non-process wastewaters associated with steel 

finishing operations via the 84" X 91" sewer to the final oil skimming basin at 

Outfall 034 for treatment prior to discharge through Outfall 034. 

[2] The permittee shall monitor Outfall 606 for oil and grease, total chromium, lead, 

zinc, and phenols ( 4AAP) on the same days that monitoring for Outfalls 034, 604 

and 605 occurs. 

[3] Corrective action will be initiated after an investigation of any reported discharges 

of process wastewaters discharging from Outfall 606. 

[ 4] The permittee shall measure and report the identified metals as total recoverable 

metals. 

Requirements 

Sample 

~ 

24-Hr. Total 

Grab 

24-Hr. Comp. 

24-Hr. Comp. 

24-Hr. Comp. 

24-Hr. Comp. 
Parameter 

Page 40 of 139 

Permit No. IN0000281 

23. During the period beginning on the effective date of this permit, the 

pe1mittee is authorized to discharge north blast furnace non-contact 

cooling water, No. 5 electric power station non-contact cooling water, CoGeneration Plant non-contact cooling water, steam condensate, and storm 

water runoff through Outfall 035 to Lake Michigan. Samples taken in 

compliance with the monitoring requirements below shall be taken at a 

point representative of the discharge but prior to entry into Lake Michigan. 

Such discharge shall be limited and monitored by the pennittee as 

specified below: 

DISCHARGE LIMITATIONS [1][6][7][10][11] 

Outfall 035 

Table 1 

Quantity or Loading Quality or Concentration 

Monthly Daily Monthly Daily 

Average Maximum Units Average Maximum 

Monitoring 

Measurement 

Units Frequency 

Flow Report Report MGD Daily 

Oil & Grease [2) [13) Report mg/1 1 X Weekly 

Temperature [3] 

Discharge 

Intake [4] 

Thermal Discharge See Footnote [5] for Effluent Limitations 

Report 

Report 

OF I X Hour 

op 1 X Hour 

BTU/Hr Daily 

Total Residual Chlorine [9][12) 10 24 [8] lbs/day 8 18 ug/1 Daily 

Parameter 

pH 

Quality or Concentration 

Daily Daily 

Minimum Maximum 

6.0 9.0 

Units 

s.u. 

Table 2 

Monitoring 

Measurement 

Frequency 

1 X Monthly 

[1] The permittee may discharge non-contact cooling waters from blast furnace and 

sintering operations only through Outfalls 015, 018, 019, and 035. 

[2] Additional monitoring and reporting requirements are contained in Part I.O., 

Visible Oil Corrective Action Monitoring Program. 

[3] See Part III.A.2. for additional temperature requirements. 

[4] The permittee shall continuously monitor intake temperature at the No.2 Pump 

Station. 

[5] The effluent limitation is 1.211 billion BTU/hour as a maximum daily average. 

Monitoring shall include flow and intake and outlet temperatures as measured 

across the condensers on the continuous basis. The daily average BTU's/hour 

shall be calculated as follows: the BTU's/hour shall be determined once each 

hour and those volumes shall be averaged over a 24 our period for each day. 

[ 6] There shall be no discharge of blast furnace or sinter plant process wastewaters or 

process wastewater residuals through Outfall 035. 

Requirements 

San1ple 

~ 

Continuous 

Grab 

Continuous 

Continuous 

Continuous 

Grab 

Requirements 

Sample 

~ 

Grab 
Page41 of139 

Permit No. IN0000281 

[7] The permittee is prohibited from undertaking any deliberate action that would 

result in a degradation of water quality of the OSRW, unless the action complies 

with the applicable provisions of327 lAC 5-2-11.7. In addition, whether or not 

this permit contains a limitation for a BCC, the permittee shall monitor for any 

BCC known or believed to be present in the discharge, from any point or nonpoint 

source over which the permittee has control. If there is an increase in loading of a 

BCC, above nonnal variability and attributable to a deliberate action, the 

permittee shall immediately notify IDEM of the increase. If IDEM determines 

the increased discharge of the BCC does not qualify under one of the exceptions 

under 327 lAC 5-2-11. 7(b) or (c) and is attributable to a deliberate action of the 

permittee, the pem1ittee shall eliminate the increase. 

[8] Compliance with the daily maximum mass value will be demonstrated if the 

calculated mass value is less than 78.5 lbs/day. 

[9] Monitoring for TRC shall be 1 X Daily during zebra or quagga mussel intake 

chlorination, and continue for three additional days after zebra or quagga mussel 

treatment has been completed. See Part I.P. for Zebra and Quagga Mussel 

Control and Chlorination for additional requirements. 

[10] See the Fact Sheet for the water treatment additives in use at Outfall 035 that have 

been reviewed and are approved for use at this facility by the Commissioner. In 

the event that changes are to be made in the use of water treatment additives 

including dosage rates contributing to Outfall 035, the permittee shall notify the 

Indiana Department of Environmental Management as required in Part II. C .1 of 

this permit. The use of any new or changed water treatment additives or dosage 

rates shall not cause the discharge from any permitted outfall to exhibit chronic or 

acute toxicity. Acute and chronic aquatic toxicity information must be provided 

with any notification regarding any new or changed water treatment additives or 

dosage rates. 

[11] See Part LB. ofthe permit for the Narrative Water Quality Standards. 

[12] See Part I.G. of the permit for Pollutant Minimization Requirements. 

[ 13] If oil and grease is measured in the effluent in significant quantities, the source of such discharge 

is to be investigated and eliminated. The facility is required to investigate and eliminate any 

significant or measured concentration of oil and grease (quantities in excess of 5 mg/1). The 

intent of this requirement is to assure that oil and grease is not added to once-through cooling 

water in measurable quantities (5 mg/1). 
Page 42 of 139 

Permit No. IN0000281 

24. During the period beginning on the effective date of this permit, the 

permittee is authorized to discharge non-contact cooling water from the 5-

Stand Cold Reduction Mill, North Sheet Mill Annealing, the No. 6 and 8 

Galvanized lines, air compressor non-contact cooling water, steam 

condensate, and storm water runoff through Outfall 03 7 to Lake Michigan. 

Samples taken in compliance with the monitoring requirements below 

shall be taken at a point representative of the discharge but prior to entry 

into Lake Michigan. Such discharge shall be limited and monitored by the 

permittee as specified below: 

DISCHARGE LIMITATIONS [1][7][8][9] 

Outfall 037 

Table 1 

Quantity or Loading Quality or Concentration Monitoring Requirements 

Monthly Daily Monthly Daily Measurement Sample 

Parameter Average Maximum Average Maximum Frequency ~ 

Flow 

Interim 

Final [6] 

Temperature 

Discharge 

Interim 

Final [6] 

Intake 

Report 

Report 

Report 

Report 

MGD 

MGD 

1 X Weekly 

Daily 

Report oF 1 X Week 

Report oF 1 X Hour 

Report oF 1 X Hour 

Thennal Discharge [6] 

Oil & Grease [2] [11] 

Zinc [3] Report 

Report 

0.45 [4] 

lbs/day 

lbs/day 

Report 

Report 

Report 

BTU/Hr Daily 

mg/1 1 X Weekly 

mg/1 1 X Monthly 

Phenols ( 4AAP) Report mg/1 1 X Monthly 

Total Residual Chlorine [1 0] 0.20 lbs/day 8 18 ug/1 Daily [5] 

Parameter 

pH 

Quality or Concentration 

Daily Daily 

Minimum Maximum 

6.0 9.0 

Units 

s.u. 

Table 2 

[ 1] There shall be no discharge of process wastewater through Outfall 03 7. 

Monitoring 

Measurement 

Frequency 

1 X Monthly 

[2] Additional monitoring and reporting requirements are contained in Part LO., 

Visible Oil Corrective Action Monitoring Program. 

[3] The permittee shall measure and report the identified metals as total recoverable 

metals. 

[4] Compliilllce with the daily maximum mass value will be demonstrated if the 

calculated mass value is less than 1.5 lbs/day. 

[5] Monitoring for TRC shall be 1 X Daily during zebra or quagga mussel intake 

chlorination, and continue for three additional days after zebra or quagga mussel 

treatment has been completed. See Part I.P. for Zebra and Quagga Mussel 

Control and Chlorination for additional requirements. 

Estimate 

Continuous 

Grab 

Continuous 

Continuous 

Continuous 

Grab 

24-Hr. Comp. 

24-Hr. Comp. 

Grab 

Requirements 

Sarl1ple 

Tyoe 

Grab 
Page 43 of 139 

Permit No. IN0000281 

[6] See Part III.A.2. and A.3. for additional temperature requirements and compliance 

schedule for continuous monitoring requirements for temperature and flow. 

[7] See the Fact Sheet for the water treatment additives in use at Outfall 037 that have 

been reviewed and are approved for use at this facility by the Commissioner. In 

the event that changes are to be made in the use of water treatment additives 

including dosage rates contributing to Outfall 03 7, the permittee shall notify the 

Indiana Department of Environmental Management as required in Part II.C.1 of 

this permit. The use of any new or changed water treatment additives or dosage 

rates shall not cause the discharge from any permitted outfall to exhibit chronic or 

acute toxicity. Acute and chronic aquatic toxicity information must be provided 

with any notification regarding any new or changed water treatment additives or 

dosage rates. 

[8] The permittee is prohibited from undertaking any deliberate action that would 

result in a degradation of water quality of the OSRW, unless the action complies 

with the applicable provisions of327 lAC 5-2-11.7. In addition, whether or not 

this permit contains a limitation for a BCC, the permittee shall monitor for any 

BCC known or believed to be present in the discharge, from any point or nonpoint 

source over which the permittee has control. If there is an increase in loading of a 

BCC, above normal variability and attributable to a deliberate action, the 

permittee shall immediately notify IDEM of the increase. If IDEM determines 

the increased discharge of the BCC does not qualify under one of the exceptions 

under 327 lAC 5-2-11.7(b) or (c) and is attributable to a deliberate action ofthe 

permittee, the permittee shall eliminate the increase. 

[9] See Part LB. of the permit for the Narrative Water Quality Standards. 

[10] See Part I.G. of the permit for Pollutant Minimization Requirements. 

[11] If oil and grease is measured in the effluent in significant quantities, the source of such discharge 

is to be investigated and eliminated. The facility is required to investigate and eliminate any 

significant or measured concentration of oil and grease (quantities in excess of 5 mg/1). The 

intent of this requirement is to assure that oil and grease is not added to once-through cooling 

water in measurable quantities (5 mg/1). 
Page 44 of 139 

Permit No. IN0000281 

25. During the period beginning on the effective date of this permit, the 

permittee is authorized to discharge non-contact cooling water from the 

84" Hot Strip Mill, non-contact cooling water from the reheat furnaces, 

emergency overflows from the 84" Hot Strip Mill roughing mill scale pit, 

steam condensate, non-contact cooling water from a cooling tower and 

storm water through Outfall 039 to Lake Michigan. Samples taken in 

compliance with the monitoring requirements below shall be taken at a 

point representative of the discharge but prior to entry into Lake Michigan. 

Such discharge shall be limited and monitored by the permittee as 

specified below: 

DISCHARGE LIMITATIONS [1][5][6][7] 

Outfall 039 

Table 1 

Quantity or Loading Quality or Concentration Monitoring Requirements 

Monthly Daily Monthly Daily Measurement Sample 

Parameter 

Flow 

Interim 

Final [4] 

Temperature 

Average Maximum Units Average Maximum Frequency ~ 

Discharge 

Interim 

Final [4] 

Intake [4] 

Report 

Report 

Report 

Report 

MGD 

MGD 

Report 

Report 

Report 

OF 

OF 

OF 

l X Weekly 

Daily 

l X Week 

I X Hour 

l X Hour 

Them1al Discharge [4] 

Oil & Grease [9] 

Report 

Report 

BTU/Hr Daily 

mg/1 1 X Weekly 

Total Residual Chlorine [S] 3.7 8.3 [2] lbs/day 8 18 ug/1 Daily [3] 

Parameter 

pH 

Table 2 

Quality or Concentration Monitoring 

Daily Daily Measurement 

Minimum Maximum Units Frequency 

6.0 9.0 s.u. 1 X Monthly 

[1] There shall be no discharge of process wastewater through Outfall 039, except as 

provided for by Part II.B.1., 2. and 3. 

[2] Compliance with the daily maximum mass value will be demonstrated if the 

calculated mass value is less than 27.5 lbs/day. 

[3] Monitoring for TRC shall be 1 X Daily during zebra or quagga mussel intake 

chlorination, and continue for three additional days after zebra or quagga mussel 

treatment has completed. See Part I.P. for Zebra and Quagga Mussel Control and 

Chlorination for additional requirements. 

[4] See Part III.A.2. and A.3. for additional temperature requirements and compliance 

schedule for continuous monitoring requirements for temperature and flow. 

[5] See the Fact Sheet for the water treatment additives in use at Outfall 039 that have 

been reviewed and are approved for use at this facility by the Commissioner. In 

Estimate 

Continuous 

Grab 

Continuous 

Continuous 

Continuous 

Grab 

Grab 

Requirements 

Sample 

Tvpe 

Grah 
Page 45 of 139 

Permit No. IN0000281 

the event that changes are to be made in the use of water treatment additives 

including dosage rates contributing to Outfall 039, the permittee shall notify the 

Indiana Department of Environmental Management as required in Part II.C.l of 

this permit. The use of any new or changed water treatment additives or dosage 

rates shall not cause the discharge from any permitted outfall to exhibit chronic or 

acute toxicity. Acute and chronic aquatic toxicity information must be provided 

with any notification regarding any new or changed water treatment additives or 

dosage rates. 

[ 6] The permittee is prohibited from undertaking any deliberate action that would 

result in a degradation of water quality of the OSRW, unless the action complies 

with the applicable provisions of327 lAC 5-2-11.7. In addition, whether or not 

this permit contains a limitation for a BCC, the permittee shall monitor for any 

BCC known or believed to be present in the discharge, from any point or nonpoint 

source over which the permittee has control. If there is an increase in loading of a 

BCC, above normal variability and attributable to a deliberate action, the 

permittee shall immediately notify IDEM of the increase. IfiDEM determines 

the increased discharge of the BCC does not qualify under one of the exceptions 

under 327 lAC 5-2-11.7(b) or (c) and is attributable to a deliberate action ofthe 

permittee, the permittee shall eliminate the increase. 

[7] See Part LB. of the permit for the Narrative Water Quality Standards. 

[8] See Part I.G. of the permit for Pollutant Minimization Requirements. 

[9] If oil and grease is measured in the effluent in significant quantities, the source of such discharge 

is to be investigated and eliminated. The facility is required to investigate and eliminate any 

significant or measured concentration of oil and grease (quantities in excess of 5 mg/1). The 

intent of this requirement is to assure that oil and grease is not added to once-through cooling 

water in measurable quantities (5 mg/1). 
Parameter 

Flow 

Oil & Grease 

Page 46 of 13 9 

Pennit No. IN0000281 

27. During the period beginning on the effective date of this permit, the 

permittee is authorized to discharge non-contact cooling water from the 

ore yard rectifier system through Outfall(s) 041A and 041B to Lake 

Michigan. Samples taken in compliance with the monitoring requirements 

below shall be taken at a point representative of the discharge but prior to 

entry into the boat slip at Lake Michigan. Such discharge shall be limited 

and monitored by the permittee as specified below: 

Quantity or Loading 

Monthly Daily 

DISCHARGE LIMITATIONS [1][2] 

Outfall 041A & 041B 

Quality or Concentration 

Monthly Daily 

Average Maximum Units Average Maximum 

Report Report MGD 

Monitoring 

Measurement 

Frequency 

1 X Monthly 

1 X Monthly 

Total Residual Chlorine [4][5] 0.0057 0.013 [6] 

Report 

Report 

Jbs/day 8 

lbs/day Report 

Repmi 

18 

Report 

mg/1 

ug/1 

mg/1 

Daily 

Zinc [3] Report 

Quality or Concentration 

Daily Daily 

Minimum Maximum 

6.0 9.0 

Units 

s.u. 

Table 2 

[1] See Part LB. of the permit for the Narrative Water Quality Standards. 

1 X Monthly 

Monitoring 

Measurement 

Frequencv 

1 X Monthly 

[2] The permittee is prohibited from undertaking any deliberate action that would 

result in a degradation of water quality of the OSRW, unless the action complies 

with the applicable provisions of327 lAC 5-2-11.7. In addition, whether or not 

this permit contains a limitation for a BCC, the permittee shall monitor for any 

BCC known or believed to be present in the discharge, from any point or nonpoint 

source over which the permittee has controL If there i~; an increase in loading of a 

BCC, above normal variability and attributable to a deliberate action, the 

permittee shall immediately notify IDEM of the increase. !fiDEM determines 

the increased discharge of the BCC does not qualify under one of the exceptions 

under 327 lAC 5-2-11.7(b) or (c) and is attributable to a deliberate action of the 

permittee, the permittee shall eliminate the increase. 

[3] The permittee shall measure and report the identified metals as total recoverable 

metals. 

[4] Monitoring for TRC shall be 1 X Daily during zebra or quagga mussel intake 

chlorination, and continue for three additional days after zebra or quagga mussel 

treatment has completed. See Part I.P. for Zebra and Quagga Mussel Control and 

Chlorination for additional requirements. 

[5] See Part I. G. of the permit for Pollutant Minimization Requirements. 

Requirements 

Sample 

~ 

Estimate 

Grab 

Grab 

Grab 

Requirements 

Sample 

~ 

Grab 
Parameter 

Flow 

Page 47 of 139 

Permit No. IN0000281 

[6] Compliance with the daily maximum mass value will be demonstrated if the 

calculated mass value is less than 0.043 lbs/day. 

28. During the period beginning on the effective date of this permit, the 

permittee is authorized to dissharge water intake screen backwash through 

Outfalls BW-1, BW-2, BW-3, BW-4, and BW-5 to Lake Michigan. 

Samples taken in compliance with the monitoring requirements below 

shall be taken at a point representative of the discharge but prior to entry 

into the boat slip at Lake Michigan. Such discharge shall be limited and 

monitored by the permittee as specified below: 

DISCHARGE LIMITATIONS [1][2][4] 

Quantity or Loading Quality or Concentration 

Monthly Daily Monthly Daily 

Average Maximum Units Average Maximum 

Report MGD 

Monitoring Requirements 

Measurement Sample 

Frequency ~ 

Quarterly [3] Estimate 

[1] Discharge of water intake screen backwash is authorized from the following Lake 

Michigan water intakes: 

BW -1 -No. 1 service water pumping station. 

BW-2- No.2 service water pumping station. 

BW-3- No.3 service water pumping station. 

BW-4- No.4 service water pumping station. 

BW-5 Lakeside service water pumping station. 

[2] There shall be no discharge of process wastewaters from Outfalls BW-1, BW-2, 

BW-3, BW-4, and BW-5. 

[3] Samples shall be taken once at any time during each of the four annual quarters: 

(A) January-February-March; 

(B) April-May-June; 

(C) July-August-September; and 

(D) October-November-December. 

For quarterly monitoring, in the first quarter for example, the permittee may 

conduct sampling within the month of January, February or March. The result 

from this reporting timeframe shall be reported on the March DMR, regardless of 

which of the months within the quarter the sample was taken. 

[ 4] See Part I.B. of the permit for the Narrative Water Quality Standards. 
B. NARRATIVE WATER QUALITY STANDARDS 

Page 48 of 139 

Permit No. IN0000281 

At all times the discharge from any and all point sources specified within this 

permit shall not cause receiving waters: 

1. including the mixing zone, to contain substances, materials, floating 

debris, oil, scum, or other pollutants: 

a. that will settle to form putrescent or otherwise objectionable 

deposits; 

b. that are in amounts sufficient to be unsightly or deleterious; 

c. that produce color, visible oil sheen, odor, or other conditions in 

such degree as to create a nuisance; 

d. which are in amounts sufficient to be acutely toxic to , or to 

otherwise severely injure or kill aquatic life, other animals, plants, 

or humans; 

e. which are in concentrations or combinations that will cause or 

contribute to the growth of aquatic plants or algae to such a degree 

as to create a nuisance, be unsightly, or otherwise impair the 

designated uses. 

2. outside the mixing zone, to contain substances in concentrations which on 

the basis of available scientific data are believed to be sufficient to injure, 

be chronically toxic to, or be carcinogenic, mutagenic, or teratogenic to 

humans, animals, aquatic life, or plants. 

C. MONITORING AND REPORTING 

1. Representative Sampling 

Samples and measurements taken as required herein shall be 

representative of the volume and nature of the discharge. 

2. Discharge Monitoring Reports 

a. For parameters with monthly average water quality based effluent 

limitations (WQBELs) below the LOQ, daily effluent values that 

are less than the limit of quantitation (LOQ) may be assigned a 

value of zero (0). 
Page 49 of 139 

Permit No. IN0000281 

b. For all other parameters for which the monthly average WQBEL is 

equal to or greater than the LOQ, calculations that require 

averaging of measurements of daily values (both concentration and 

mass) shall use an arithmetic mean. When a daily discharge value 

is below the LOQ, a value of zero (0) shall be used for that value in 

the calculation to determine the monthly average unless otherwise 

specified or approved by the Commissioner. 

c. Effluent concentrations less than the LOD shall be reported on the 

Discharge Monitoring Report (DMR) forms as < (less than) the 

value of the LO D. For example, if a substance is not detected at 

a concentration of 0.1 flg/1, report the value as <0.1 flg/l. 

d. Effluent concentrations greater than or equal to the LOD and less 

than the LOQ that are reported on a DMR shall be reported as the 

actual value and annotated on the DMR to indicate that the value is 

not quantifiable. 

e. Mass discharge values which are calculated from concentrations 

reported as less than the value of the limit of detection shall be 

reported as less than the corresponding mass discharge value. 

f. Mass discharge values that are calculated from effluent 

concentrations greater than the limit of detection shall be reported 

as the calculated value. 

g. See Part III.E of the permit for additional reporting requirements 

for values below the limit of quantitation (LOQ). 

The permittee shall submit federal and state discharge monitoring reports 

to the Indiana Department of Environmental Management containing 

results obtained during the previous month which shall be postmarked no 

later than the 28th day of the month following each completed monitoring 

period. The first report shall be submitted by the 28th day of the month 

following the month in which the permit becomes effective. 

The Regional Administrator may request the permittee to submit 

monitoring reports to the Environmental Protection Agency if it is deemed 

necessary to assure compliance with the permit. 

3. Definitions 

a. Monthly Average 
Page 50 of 139 

Pennit No. IN0000281 

(1) Mass Basis - The "monthly average" discharge means the 

total mass discharge during a calendar month divided by 

the number of days in the month that the production or 

commercial facility was discharging. Where less than daily 

samples is required by this permit, the monthly average 

discharge shall be determined by the summation of the 

measured daily mass discharges divided by the number of 

days during the calendar month when the measurements 

were made. 

(2) Concentration Basis - The "monthly average" concentration 

means the arithmetic average of all daily determinations of 

concentration made during a calendar month. When grab 

samples are used, the daily determination of concentration 

shall be the arithmetic average (weighted by flow value) of 

all the samples collected during the calendar day. 

b. "Daily Discharge" 

(1) Mass Basis -The "daily discharge" means the total mass 

discharge by weight during any calendar day. 

(2) Concentration Basis- The "daily discharge" means the 

average concentration over the calendar day or any twentyfour (24) hour period that reasonably represents the 

calendar day for the purposes of sampling. 

c. "Daily Maximum" 

(1) Mass Basis- The "daily maximum" means the maximum 

daily discharge mass value for any calendar day. 

(2) Concentration Basis- The "daily maximum" means the 

maximum daily discharge value for any calendar day. 

(3) Temperature Basis- The "daily maximum" means the 

highest temperature value measured for any calendar day. 

d. A 24-hour composite sample consists of at least 3 individual flowproportioned samples of wastewater, taken by the grab sample 

method or by an automatic sampler, which are taken at 

approximately equally spaced time intervals for the duration of the 

discharge within a 24-hour period and which are combined prior to 

analysis. A flow-proportioned composite sample may be obtained 

by: 
Page 51 of 139 

Permit No. IN0000281 

(1) recording the discharge flow rate at the time each 

individual sample is taken, 

(2) adding together the discharge flow rates recorded from 

each individuals sampling time to formulate the "total 

flow" value, 

(3) the discharge flow rate of each individual sampling time is 

divided by the total flow value to determine its percentage 

of the total flow value, 

( 4) then multiply the volume of the total composite sample by 

each individual sample's percentage to determine the 

volume of that individual sample which will be included in 

the total composite sample. 

e. Concentration -The weight of any given material present in a unit 

volume of liquid. Unless otherwise indicated in this permit, 

concentration values shall be expressed in milligrams per liter 

(mg/1). 

f. The "Regional Administrator" is defined as the Region V 

Administrator, U.S. EPA, located at 77 West Jackson Boulevard, 

Chicago, Illinois 60604. 

g. The "Commissioner" is defined as the Commissioner of the 

Indiana Department of Environmental Management, which is 

located at the following address: 100 North Senate Avenue, 

Indianapolis, Indiana 46204. 

h. "Limit of Detection" or "LOD" means a measurement of the 

concentration of a substance that can be measured and repmied 

with ninety-nine percent (99%) confidence that the analyte 

concentration is greater than zero (0) for a particular analytical 

method and sample matrix. The LOD is equivalent to the method 

detection level or MDL. 

1. "Limit of Quantitation" or "LOQ" means a measurement of the 

concentration of a contaminant obtained by using a specified 

laboratory procedure calibrated at a specified concentration above 

the method detection level. It is considered the lowest 

concentration at which a particular contaminant can be 

quantitatively measured using a specified laboratory procedure for 
Page 52 of 139 

Permit No. IN0000281 

monitoring of the contaminant. This term is also sometimes called 

limit quantification or quantification level. 

J. "Method Detection Level" or "MDL" means the minimum 

concentration of an analyte (substance) that can be measured and 

reported with a ninety-nine percent (99%) confidence that the 

analyte concentration is greater than zero (0) as determined by 

procedure set forth in 40 CFR 136, Appendix B. The method 

detection level or MDL is equivalent to the LOD. 

4. Test Procedure 

The analytical and sampling methods used shall conform to the current 

version of 40 CFR 136. Multiple editions of Standard Methods for the 

Examination of Water and Wastewater are currently approved for most 

methods, however, 40 CFR Part 136 should be checked to ascertain if a 

particular method is approved for a particular analyte. The approved 

methods may be included in the texts listed below. However, different but 

equivalent methods are allowable if they receive the prior written approval 

of the Commissioner and the U.S. Environmental Protection Agency. 

a. Standard Methods for the Examination of Water and Wastewater 

18th, 19th, or 20th Editions, 1992, 1995, or 1998, American Public 

Health Association, Washington, D.C. 20005. 

b. A.S.T.M. Standards, Parts 23, Water; Atmosphere Analysis 

1972 American Society for Testing and Materials, Philadelphia, 

PA 19103. 

c. Methods for Chemical Analysis of Water and Wastes 

June 1974, Revised, March 1983, Environmental Protection 

Agency, Water Quality Office, Analytical Quality Control 

Laboratory, 1014 Broadway, Cincinnati, OH 45202. 

d. The following analytical methods and limits of detection and limits 

of quantitation shall be used: 

Concentration (in ug/1) 

Parameter [7] Method [1] LOD (LOQ or 

ML) 

SM 4500-NH3-G, 10 32 

Ammonia EPA 350.1 (undistilled) 

SM 4500-NH3-G 50 160 

(w/prep SM 4500-NH3-B) 
(distilled) 

Benzene EPA 624 

Benzo( a )pyrene 610 HPLC [4] 

Benzo(a)pyrene 610-GC/MS [4] 

Cadmium 200.8 

CBODs SM 5210B 

Chloride SM 4500 Cl E 

(Colorimetric Automated) 

EPA 300.0 (Anions by IC) 

----

Copper 200.8 

Cyanide, Total SM 4500-CN-E [2] 

(colorimetric) 

Cyanide, Free 4500-CN-I [2] 

Fluoride SM 4500-F-C (Ion 

Selective Mode) 

300.0 

Hex. Chrome 218.6 

Lead 200.8 

Mercury [6] 1631 

Naphthalene 610 (HPLC) 

Naphthalene 610 MS, EPA625 

Nickel 3113B 

200.8 

Oil and Grease 1664 

Phenols 420.4 

Selenium 200.8 

Silver 200.8 

Sulfate 300.0 

Tetrachloroethylene 

624 

Total Residual 4500-CL-D,E 

Chlorine 

Total Residual 4500-CL-G 

Chlorine 

Total Suspended SM2540 D 

Solids 

Zinc 3120B 

Zinc 200.8 

Page 53 of 139 

Permit No. IN0000281 

0.5 1.6 

0.023 0.073 

2.0 [5] 5.7 

0.5 1.6 

--- 2000 

400 1300 

20 64 

---- ----

0.31 1.0 

2.5 8.0 

1 3.2 

31 100 

100 320 

0.3 0.94 

0.31 1.0 

0.0002 0.0005 

0.2 0.64 

2.0 6.4 

1 3.2 

0.5 1.6 

2000 5000 

2 6.4 

1 3.2 

0.2 0.64 

200 640 

0.4 1.3 

20 60 

20 60 

0.64 2.0 

3.3 10 

1.0 3.2 
Page 54 of 139 

Permit No. IN0000281 

[1] The methods listed are the EPA Methods referenced in 40 CFR 136 or 

approved Standard Methods (SM). 

[2] American Public Health Association. 1992. Standard Methods for the 

Examination ofWater and Wastewater. 181h Edition. Public Health 

Assoc., 1015 15th Street NW, Washington DC 20005. 

[3] Not Used. 

[4] Method 610-GC/MS shall be used at Outfall501. 

[5] MDL and resulting LOQ apply to Outfall501. 

[6] Revision E, or the most currently approved revision. 

[7] Mass for each corresponding LOD and LOQ shall be determined using 

the corresponding concentration provided in the above table multiplied by 

8.345 multiplied by the corresponding outfalls flow in MGD. For each 

outfall use the following in Million Gallons per Day (MGD): 

Outfall 005 = 60.4; Outfall 005 (with former 010)= 61.2 Outfall 015=1.7; 

Outfall 018= 58.2; Outfall 019= 49.3; Outfall 020= 80.6; Outfall 021 = 0.6; 

Outfall 023= 0.1; Outfall 028/030= 28.2; Outfall 032= 0.3; Outfall 033 = 

0.2; Outfall 034= 25.4; Outfall 035= 156.8; Outfall 037= 3.0; Outfall 

039= 55.0; Outfall 041 =0.086. 

The permittee may determine a case-specific Limit of Detection (LOD) or 

Limit of Quantitation (LOQ) using the analytical method specified above, 

or any other test method which is approved by IDEM prior to use. The 

LOD shall be derived by the procedure specified for method detection 

limits contained in 40 CFR Part 136, Appendix B, and the LOQ shall be 

set equal to 3.18 times the LOD. Other methods may be used if first 

approved by the IDEM. 

5. Recording of Results 

For each measurement or sample taken pursuant to the requirements of 

this pennit, the permittee shall record the following information: 

a. The exact place, date, and time of sampling; 

b. The person(s) who performed the sampling or measurements; 

c. The dates the analyses were performed; 

d The person(s) who performed the analyses; 

e. The analytical techniques or methods used; and 

f. The results of all required analyses and measurements. 
6. Additional Monitoring by Permittee 

Page 55 of 139 

Permit No. IN0000281 

If the permittee monitors any pollutant at the location(s) designated herein 

more frequently than required by this permit, using approved analytical 

methods as specified above, the results of this monitoring shall be 

included in the calculation and reporting of the values required in the 

monthly Discharge Monitoring Report (DMR). Such increased frequency 

shall also be indicated. Other monitoring data not specifically required in 

this permit (such as internal process or internal waste stream data) which 

is collected by or for the permittee need not be submitted unless requested 

by the Commissioner. 

7. Records Retention 

All records and information resulting from the monitoring activities 

required by this permit, including all records of analyses performed and 

calibration and maintenance of instrumentation and recording from 

continuous monitoring instrumentation, shall be retained for a minimum of 

three (3) years. In cases where the original records are kept at another 

location, a copy of all such records shall be kept at the permitted facility. 

The three years shall be extended: 

a. automatically during the course of any unresolved litigation 

regarding the discharge of pollutants by the permittee or regarding 

promulgated effluent guidelines applicable to the permittee; or 

b. as requested by the Regional Administrator or the Indiana 

Department of Environmental Management. 

D. SCHEDULE OF COMPLIANCE Outfall 005 Benzo(a)pyrene and Whole 

Effluent Toxicity (WET) 

1. The permittee shall achieve compliance with the effluent limitations 

specified for Benzo(a)pyrene and WET at Outfall 005 as soon as possible 

but no later than thirty-four (34) months from the effective date of this 

permit in accordance with the following schedule: 

a. The permittee shall submit a written Plan on the ability to achieve 

compliance with the new final effluent limits to the Compliance 

Evaluation Section of the Office of Water Quality (OWQ) nine (9) 

months from the effective date of this permit. IDEM will provide 

any comments within 30 days of receipt of the Plan and the 

permittee will implement the Plan immediately after receipt of 

IDEM's comments. The Plan shall include a description of the 

method(s) selected for meeting the newly imposed limitations for 
Page 56 of 139 

Pem1it No. IN0000281 

Benzo(a)pyrene and WET at Outfall 005, in addition to any other 

relevant information. Relevant information should include but is 

not be limited to summaries of any pilot studies completed, 

determination of final process selection, a summary ofthe status of 

engineering design of the selected processes, project status, 

equipment procurement, delivery, construction, training, startup, 

etc. The Plan shall also include a specific time line specifying 

when each of the steps will be taken. The new effluent limits for 

Benzo(a)pyrene and WET are deferred for the term of this 

compliance schedule, unless the new effluent limits can be met at 

an earlier date. The permittee shall notify the Compliance 

Evaluation Section of OWQ as soon as the newly imposed effluent 

limit for Benzo(a)pyrene and/or WET can be met. Upon receipt of 

such notification by OWQ, the final limits listed in the 

corresponding discharge limitations Table for Benzo(a)pyrene 

and/or WET at Outfall 005 will become effective, but no later than 

thirty-four (34) months from the effective date of this permit. 

Monitoring and reporting of the effluent for this parameter is 

required during the interim period. 

b. The permittee shall.submit a progress report to the Compliance 

Evaluation Section ofOWQ no later than eighteen (18) months 

from the effective date of this permit. This report shall include 

detailed information on the steps the permittee has taken to achieve 

compliance with the final effluent limitations and whether the 

permittee is meeting the time line set out in the initial Plan. 

c. The permittee shall submit a subsequent progress report to the 

Compliance Evaluation Section of OWQ no later than twentyseven (27) months from the effective date of this permit. This 

report shall include detailed information on the steps the permittee 

has taken to achieve compliance with the final effluent limitations 

and whether the permittee is meeting the time line set out in the 

initial Plan. 

d. Within thirty (30) days of completion of construction, the 

permittee shall file with the Industrial NPDES Permits Section of 

OWQ a notice of installation for the additional pollutant control 

equipment and a design summary of any modifications. 

e. The permittee shall comply with the fmal effluent limitations for 

Benzo(a)pyrene and WET at Outfall 005 no later than thirty-four 

(34) months from the effective date ofthis permit. 
Page 57 of 139 

Permit No. IN0000281 

2. If the permittee fails to comply with any deadline contained in the 

foregoing schedule, the permittee shall, within fourteen (14) days 

following the missed deadline, submit a written notice of noncompliance 

to the Compliance Evaluation Section of the OWQ stating the cause of 

noncompliance, any remedial action taken or planned, and the probability 

of meeting the date fixed for compliance with final effluent limitations . 

. E. SCHEDULE OF COMPLIANCE - Mercury 

Except as provided below in Paragraph 2, U. S. Steel: (a) shall implement the 

following activities for evaluating, selecting, and installing mercury control 

technology; (b) shall achieve compliance with all final water quality based effluent 

limitations for mercury as soon as possible, but in no event later than sixty months 

after the effective date of this permit; and, (c) shall not be required to comply with the 

final water quality based effluent limitations for mercury until sixty months after the 

effective date of this permit. 

1. Evaluating, Selecting and Installing Mercury Control Technology 

A. Engineering Evaluation 

a. As soon as possible, but in no event later than December 31, 2009, U. S. 

Steel shall complete an engineering review of mercury control 

technologies. The review shall include at a minimum, an assessment of all 

available and potential mercury control technologies including, but not 

limited to: ion exchange; carbon adsorption; chemical precipitation; 

filtration, including ultrafiltration; and biological treatment. The review 

shall identify sites where the evaluated technologies are currently 

implemented and shall provide information on the efficacy of the 

technologies in removing mercury at those sites. 

b. As soon as possible, but in no event later than February 28, 2010, U. S. 

Steel shall submit to IDEM an Engineering Review Report summarizing 

findings from the review of mercury control technologies. 

B. Selection of Mercury Control Technologies 

a. By the end of 13 months from the effective date of the permit, U. S. Steel 

will submit to IDEM a progress report on mercury source reduction 

activities and selection of potential mercury control technologies 

conducted during the first 12 months of the permit. 

b. For each outfall that is subject to water quality based effluent limitations 

for mercury, U. S. Steel shall complete the following as soon as possible, 
Page 58 of 139 

Permit No. IN0000281 

but in no event later than twenty-four months after the effective date of 

this permit: 

1. Develop a list of mercury control technologies that could be 

installed to reduce mercury discharges to meet the water quality 

based effluent limitations for the specific outfall at issue. In 

developing the list, U. S. Steel shall consider the engineering 

evaluation described above and a preliminary evaluation of the 

discharge characteristics of the specific outfall at issue. For each 

teclmology, U. S. Steel shall assess the teclmical feasibility to pilot 

test and install the teclmology for the outfall. 

11. Evaluate the following with regard to each mercury control 

teclmology listed for each specific outfall at issue: 

1. Technical implications or impact on products; 

2. Mercury reduction; 

3. Cross media impacts; 

4. Multi-pollutant co-control benefits; 

5. Energy efficiency or consumption impact; 

6. Service water contributions; and 

7. Economic considerations. 

111. Perform~ pilot testing of at least one listed mercury control 

teclmology for the specific outfall for which the technology was 

listed for purposes of obtaining additional information on the 

feasibility of installing the specific mercury control technology to 

reduce mercury discharges to meet the water quality based effluent 

limitations for the specific outfall at issue. 

1v. Eitlier select the specific mercury control technologies that shall be 

installed to reduce mercury discharges to meet the water quality 

bas;::d effluent limitations for the specific outfall at issue or 

detcm1ine that further pilot testing is necessary before a specific 

teclmology can be selected. 

c. As soon as possible, but in no event later than twenty-six months after 

the effective date of this permit, U. S. Steel shall submit an Engineering 

Evaluation Report to IDEM describing (i) the results of the evaluation 

and pilot testing described above, (ii) the specific mercury control 

teclmology or technologies that were selected in accordance with 

Paragraph l.B.b.iv to be installed or an explanation as to why further 

pilot testing is necessary before a specific teclmology can be selected for 

a specific outfall, (iii) why each specific technology was selected for 

each specific outfall, (iv) where the teclmologies shall be installed at the 

facility and why installation of the teclmologies at the locations shall 

reduce mercury discharges to meet the water quality based effluent 
Page 59 of 139 

Permit No. IN0000281 

limitations for each specific outfall, ( v) a schedule for installation of the 

technologies on an outfall-by-outfall basis, that is as expeditious as 

possible, and (vi) for all technologies that were considered during the 

Engineering Evaluation but not selected, an explanation as to why the 

specific technology was not selected. 

d. To the extent that U. S. Steel is unable to select a specific technology in 

accordance with Paragraph l.B.b.iv for installation to reduce mercury 

discharges to meet the water quality based effluent limitations for any 

specific outfall, U. S. Steel shall describe in the Engineering Evaluation 

Report the steps that it shall take (and a schedule for doing so) for each 

such outfall to (i) perform further pilot testing, (ii) select a specific 

technology or technologies in sufficient time to enable it to complete 

construction of the specific technology no later than ±i:fty-eight months 

from the effective date of this permit, and complete 

commissioning/training/start-up of the selected technologies no later 

than sixty months from the effective date of this permit. 

e. For each specific outfall for which U. S. Steel was unable to select a 

specific technology in accordance with Paragraph l.B.b.iv, U. S. Steel 

shall select specific mercury control technologies that shall be installed 

to reduce mercury discharges to meet the water quality based effluent 

limitations for the specific outfall at issue in accordance with the 

schedule developed in accordance with Paragraph l.B.d. Within two 

months of selecting specific mercury control technologies in accordance 

with this paragraph, U. S. Steel also shall submit to IDEM a 

Supplemental Engineering Evaluation Report pertaining to these outfalls 

describing and/or specifying: 

(i) the results of any additional pilot testing that was performed, 

(ii) the specific mercury control technology or technologies that 

were selected to be installed, 

(iii) why each specific technology was selected for each specific 

outfall, 

(iv) where the technologies shall be installed at the facility and 

why installation of the technologies at the locations shall reduce 

mercury discharges to meet the water quality based effluent 

limitations for each specific outfall, 

(v) the date or dates when construction of the specific technology 

or technologies will commence; 
Page 60 of 139 

Permit No. IN0000281 

(vi) the date or dates when construction of the specific technology 

will be completed, which shall be as soon as possible but no 

later than fifty-eight months from the effective date of this 

permit; and 

(vii) the date or dates when commissioning/training/start-up of the 

selected technologies will be completed, which shall be as soon 

as possible but no later than sixty months from the effective 

date of this permit. 

C. Installation of Mercury Control Technology 

For each outfall for which technology was selected in accordance with 

Paragraph l.B: 

a. Following selection of a specific teclmology, U. S. Steel shall 

complete engineering design for each of the specific mercury 

control technologies that were selected for installation, and shall 

provide written notice to IDEM that it has done SG. 

b. By the end of 36 months from the effective date of the permit, 

U. S. Steel will submit a progress report as outlined m the 

Engineering Evaluation Report per Paragraph l.B.c. 

c. As soon as possible, but in no event later than forty-six months from 

the effective date of this permit, U. S. Steel shall commence 

construction on each of the specific mercury control technologies 

that were selected for installation in accordance with Paragraph 

l.B.b.iv. For technologies that were selected in accordance with 

Paragraph l.B.e, U. S. Steel shall commence construction in 

accordance with the schedule specified in the Supplemental 

Engineering Report in accordance with Paragraph l.B.e. TJ. S. 

Steel shall provide written notice to IDEM whenever it commences 

construction in accordance with this paragraph. 

d. As soon as possible, but in no event later than fifty-eight months 

from the effective date of this permit, U. S. Steel shall complete 

construction of each of the specific mercury control technologies 

that were selected for installation in accordance with Paragraph 

l.B , and shall provide written notice to IDEM that it has done so. 

e. As soon as possible, but in no event later than sixty months from 

the effective date of this permit, U. S. Steel shall complete 

commissioning, training and start-up of each of the specific 

mercury control technologies that were selected for installation in 
Page 61 of 139 

Permit No. IN0000281 

accordance with Paragraph 1.B., and shall provide written notice to 

IDEM that it has done so. 

2. Termination of Compliance Schedule 

U. S. Steel is implementing mercury monitoring and mercury source reduction 

activities which may lead U. S. Steel to determine that it can achieve compliance with 

the final water quality based effluent limitations for mercury applicable to specific 

outfalls without constructing mercury control technology for the specific outfall or 

outfalls at issue in accordance with this compliance schedule. If U. S. Steel makes 

that determination, U. S. Steel may choose to terminate this compliance schedule as it 

relates to any specific outfall by providing written notice to IDEM of its decision. On 

and after the date of the written notice that U.S. Steel provides to IDEM, U.S. Steel 

shall be required to comply with the final water quality based effluent limitations for 

mercury applicable to the specified outfall or outfalls, but shall not be required to 

continue implementing the requirements of this compliance schedule pertinent to the 

specified outfall or outfalls at issue. 

F. SCHEDULE OF COMPLIANCE- Outfall 010 Benzo(a)pyrene 

This Schedule of Compliance is no longer applicable and has been removed. The 

redirection of Outfall 010 through Outfall 005 was completed June 5, 2011. The 

combined discharge is regulated as Outfall 005 in Part I.A.2. The Schedule of 

Compliance for Outfall 005 Benzo(a)pyrene is still in effect and is found in Part 

I.D. of this permit. 

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Page 62 of 139 

Pennit No. IN0000281 

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G. POLLUTION MINIMIZATION PROGRAM 

This permit contains water quality-based effluent limits for Total Residual 

Chlorine which are less than the listed limitation of quantitation (LOQ) value. 

The permittee is required to develop and conduct a pollutant minimization 

program (PMP) for Total Residual Chlorine. A PMP has already been conducted 

for Total Residual Chlorine at Outfall 034, therefore, a new PMP at Outfall 034 

will not be required for Total Residual Chlorine. One basic PMP for TRC can be 

submitted for all affected Outfalls. If the PMP submitted previously for Outfall 

034 incorporates the PMP requirements that will be in essence the same as for the 

other US Steel outfalls covered in this permit then all USS will need to do to meet 

this requirement is to re-submit that PMP along with a letter to that effect and 

separate PMP's for the remaining outfalls will not be required. 

The laboratory US Steel utilizes to measure selenium has been capable of 

measuring down to a level that is currently below the water quality based effluent 

limit. As long as the laboratory is capable of demonstrating the case-specific 
Page 63 of 139 

Permit No. IN0000281 

LOD of 1.0 ug/1 using Test Method 270.2, the pollutant minimization program 

remains suspended for Selenium at Outfall 005. If it is determined that the casespecific LOD is invalid then the original PMP requirements shall be reimplemented for Selenium at Outfall 005. 

1. The goal of the pollutant minimization program shall be to maintain the 

effluent at or below the WQBEL. The polluta1:.t minimization program 

shall include, but is not limited to, the following: 

a. Submit a control strategy designed to proceed toward the goal 

within 180 days of the effective date of this permit. 

b. Implementation appropriate cost-effective control measures, 

consistent with the control strategy within 365 days of the effective 

date of this permit. 

c. Monitor as necessary to record the progress toward the goal. 

Potential sources of the pollutant shall be monitored on a semiannual basis. Quarterly monitoring ofthe influent of the 

wastewater treatment system is also required. The permittee may 

request a reduction in this monitoring requirement after four 

quarters of monitoring data. 

d. Submit an annual status to the Commissioner at the address listed 

in Part I.C.3.g. to the attention of the Office of Water Quality, 

Compliance Evaluation Section, by January 31 of each year that 

includes the following information: 

(i) All minimization program monitoring results for the 

prevwus year. 

:(ii) A list of potential sources of the pollutant. 

(iii) A summary of all actions taken to reduce or eliminate the 

identified sources of the pollutant. 

e. A pollution minimization program may include the submittal of 

pollution prevention strategies that use changes in production 

process technology, materials, processes, operations, or procedures 

to reduce or eliminate the source of the pollutant. 

2. No pollution minimization program is required if the permittee 

demonstrates that the discharge of a pollutant with a WQBEL below the 

LOQ is reasonably expected to be in compliance with the WQBEL at the 
Page 64 ofl39 

Pennit No. IN0000281 

point of discharge into the receiving water. This demonstration may 

include, but is not limited to, the following: 

a. Treatment infonnation, including information derived from 

modeling the destruction of removal of the pollutant in the 

treatment process. 

b. Mass balance information. 

c. Fish tissue studies or other biological studies. 

3. In determining appropriate cost-effective control measures to be 

implemented in a pollution minimization program, the following factors 

may be considered: 

a. Significance of sources. 

b. Economic and technical feasibility. 

c. Treatability. 

H. REOPENING CLAUSES 

This permit may be modified, or alternately, revoked and reissued, after public 

notice and opportunity for hearing: 

1. to comply with any applicable effluent limitation or standard issued or 

approved under 301(b)(2)(C),(D) and (E), 304 (b)(2), and 307(a)(2) of the 

Clean Water Act, if the effluent limitation or standard so issued or 

approved: 

a. contains different conditions or is otherwise more stringent than 

any effluent limitation in the permit; or 

b. controls any pollutant not limited in the permit. 

2. to incorporate any of the reopening clause provisions cited at 327 lAC 5-

2-16. 

3. to include limitations for specific toxicants if the results of the 

biomonitoring and/or the TRE study indicate that such limitations are 

necessary to meet Indiana Water Quality Standards. 

4. After reviewing the temperature monitoring data as required in Part III of 

the permit, the IDEM reserves the right to reopen the permit and, after 
Page 65 of 139 

Pe1mit No. IN0000281 

public notice and opportunity for hearing, to establish more appropriate 

temperature requirements. 

5. to include a case-specific Limit of Detection (LOD) and/or Limit of 

Quantitation (LOQ). The permittee must demonstrate that such action is 

warranted in accordance with the procedures specified under Appendix B, 

40 CFR Part 136, using the most sensitive analytical methodsapproved by 

EPA under 40 CFR Part 136, or approved by the Commissioner. 

6. To revise (such as more or less frequent monitoring) or remove the 

requirements of the pollutant minimization program (Part I.G.) if 

supported by information generated as a result of this program. 

7. To incorporate effluent limitations reflecting the results of a TMDL or a 

revised wasteload allocation if the IDEM determines that such effluent 

limitations are needed to assure that State Water Quality Standards are met 

in the receiving stream. 

8. To include revisions based upon site specific studies. The permittee shall 

submit work plans to conduct such site-specific studies before initiation of 

the study. Workplans must be approved by IDEM and the results of all 

such studies must be approved by IDEM and possibly EPA. Any 

necessary rulemaking must be completed before the pe1mit may be 

modified to reflect the results of the studies. 

9. To include a monitoring waiver for total cyanide and silver at Outfall 604 

if the IDEM determines that such a waiver is appropriate after the review 

of at least twelve (12) months of monitoring data. 

10. To modify the monitoring frequency for CBOD5 after a review of twelve 

months of data at Outfalls 607 and 015. 

I. SANITARY LIFT STATION EMERGENCY OVERFLOWS 

1. Discharges from sanitary sewer system lift stations or any other portion of 

the sanitary sewer system are expressly prohibited. Should any discharge 

occur, the permittee shall notify the Compliance Evaluation Section within 

the Office of Water Quality within 24 hours and in writing within five 

days of the event in accordance with Part II.C.4. The correspondence 

shall include a description of the duration and cause of the discharge as 

well as the remedial action taken to eliminate it. The duration and 

estimated volume of the discharge shall also be reported on the Discharge 

Monitoring Report. The permittee shall comply with any other relevant 

provision of its permit in the event of a discharge, including 327 lAC 5-2-

8(3). 
Page 66 of 139 

Permit No. IN0000281 

2. The above stipulations apply to the following sanitary lift stations: 

Lift Station Discharge Point 

Outfall 018 

Outfall 023 

Outfall 032 

Outfall 033 

SOF-6 

SOF-11 

SOF-3 

SOF-51 

SOF-1 

SOF-2 

SOF-4 

SOF-5 

SOF-17 

Direct to Grand Calumet River 

Grand Calumet River via GW -11 Pumping Station 

Grand Calumet River via GW-10 Pumping Station 

Direct to Lake Michigan 

Grand Calumet River via GW -10 Pumping Station 

J. STORM WATER MONITORING AND NON-NUMERIC CONDITIONS 

1. Beginning on the effective date the permittee shall conduct storm water 

monitoring for the storm water discharge points set out in Paragraph 2, of 

this section on a semi-annualbasis. 

2. Storm Water Monitoring: 

(a) Storm Water Monitoring Points: 

SW-01 

SW-02 

SW-08 

SW-11 

SW-06 

DA#ll 

DA#ll 

DA#32 

bA#29 

SW-12 (Railroad Kirk 

Yard) DA #22 

Outfall 032 DA #20 

Outfall 033 DA #21 

DA - Drainage Area 

GCR- Grand Calumet River 

LM - Lake Michigan 

East Side of Slip (LM) 

West Side of Slip (LM) 

Virginia Tunnel Drain (GCR) 

Broadway Tunnel Drain (GCR) 

Railroad Lines (LM) 

Outfall 034 Channel (GCR) 

Bar Mill and Billet Storage Areas (GCR) 

Tin Plate Areas, Atmospheric Gas Plant, 

Sheet Mill (GCR) 

(b) Monitoring requirements applicable to all points listed above: 

Oil & Grease, Carbonaceous Biochemical Oxygen Demand (CBOD5), 

Chemical Oxygen Demand (COD), Total Suspended Solids (TSS), Total 

Kjeldahl Nitrogen, Nitrite Plus Nitrate Nitrogen, Total Phosphorus, zinc, 

and pH. 
Page 67 of 139 

Permit No. IN0000281 

(c) Additional monitoring requirements for specific outfalls are: 

Monitoring Points SW-01, 02, 06, 08, 11, and SW-12- Ammonia (as N), 

lead, and copper. 

Monitoring Points SW -02- Iron and Manganese. 

(d) For all point source discharges of storm water see Part LB. ofthe 

permit for the Narrative Water Quality Standards. 

(e) In the event storm water runoff is not discharged from the same 

locations monitored for in the storm water application (2F) dated March 

1999, the permittee shall monitor storm water runoff from a point or 

points representative of the discrete storm water drainage areas illustrated 

in the application. 

(f) Areas no longer subject to Storm Water requirements: 

DA #1, #3, #4 Coal Handling Yard- Mason Basin #5 does not discharge 

to waters ofthe State. SW-10- Tennessee Drain (Redirected to the Blast 

Furnace Recycle Closed Loop) does not discharge to waters of the State. 

(g) Monitoring Pollutant Reduction Measures: 

This permit stipulates a pollutant baseline concentration that shall be used 

as a means for comparison of future discharge concentrations. Baseline 

monitoring will be on a semi-annual basis and will provide a basis for the 

facility to know when additional corrective measures are necessary. 

US Steel will use the previous five years of storm water data from the 

effective date of the permit to statistically determine the initial baseline 

concentration for total recoverable zinc, total suspended solids, and COD. 

New baseline concentrations shall be statistically re-calculated using a five 

year rolling dataset whenever the semi-annual concentration(s) is less than 

the existing baseline concentration(s). A new baseline exceeding an 

existing baseline will default to the existing baseline until the next recalculation. A sample result exceeding an existing baseline at the time of 

comparison shall never be included in a baseline recalculation. 

Stormwater monitoring data collected during the permit term shall be 

compared to the baseline concentrations to determine if the control 

measures being implemented at the site result in an improvement from the 

baseline established by the permittee. If the sample result exceeds the 

baseline concentration, the permittee must take corrective actions in Part 
Page 68 of 139 

Permit No. IN0000281 

1.7.b .. of the permit. Follow-up sampling should occur as soon as possible 

after implementation of corrective actions. 

An exceedance of a baseline concentration is not a permit violation. 

However, failing to take the corrective actions in Part 1.7 as a result of a 

baseline concentration exceedance is a violation of the permit. The 

permittee shall strive for continuous improvement from the baseline until 

it has been demonstrated that the permittee has implemented the best 

management practice to meet the provisions in Part J.5. of this permit. 

This permit also requires an annual review of the selection, design, 

installation, and implementation of your control measures (See Part J.6). 

The permittee shall retain any and all records related to this documentation 

within the SWPPP. In addition, this same information must also be 

submitted to the Industrial NPDES Permit Section on an annual basis. 

(h) Parameters for determining baseline concentrations: 

Monitoring Parameters --------·------------~ --------- __ _;__:.__;_:....___;_ ----------~·----

Parameter jOutfalls JMonitoring Concen -~~-~~-~~~ " ·---------~------···~-

Total Recoverable Zinc !All stormwater locations in 1.2. !Report mg/1 ---------------------------,- . ------------------------ -----~----------·-----------· 

"~6~s~_:ds~~:::::::::::~Jg$~~·· -=:=j 

2.5 Control Measures and Effluent Limits 

In the technology-based limits included in Part J.3-5., the term "minimize" 

means reduce and/or eliminate to the extent achievable using control 

measures (including best management practices) that are technologically 

available and economically practicable and achievable in light of best 

industry practice. 

3. Control Measures 

Select, design, install, and implement control measures (including best 

management practices) to address the selection and design 

considerations in Part 1.4 to meet the non-numeric effluent limits in Part 

1.5. The selection, design, installation, and implementation of these 

control measures must be in accordance with good engineering practices 

and manufacturer's specifications. This also includes the BMP 

requirements for the Coal Processing Area. Any deviation from the 

manufacturer's specifications shall be documented. If the control 

measures are not achieving their intended effect in minimizing pollutant 
Page 69 of 139 

Pennit No. IN0000281 

discharges, the control measures must be modified as expeditiously as 

practicable. Regulated stormwater discharges from the facility include 

stormwater run-on that commingles with stormwater discharges 

associated with industrial activity at the facility. 

4. Control Measure Selection and Design Considerations 

When selecting and designing control measures consider the following: 

a. preventing stormwater from coming into contact with polluting 

materials is generally more effective, and cost-effective, than 

trying to remove pollutants from stormwater; 

b. use of control measures in combination is more effective than use 

of control measures in isolation for minimizing pollutants in 

stormwater discharge; 

c. assessing the type and quantity of pollutants, including their 

potential to impact receiving water quality, is critical to designing 

effective control measures that will achieve the limits in this 

permit; 

d. minimizing impervious areas at your facility and infiltrating runoff 

onsite (including bioretention cells, green roofs, and pervious 

pavement, among other approaches), can reduce runoff and 

improve groundwater recharge and stream base flows in local 

streams, although care must be taken to avoid ground water 

contamination; 

e. flow can be attenuated by use of open vegetated swales and natural 

depressions; 

f. conservation and/or restoration of riparian buffers will help protect 

streams from storm water runoff and improve water quality; and 

g. use oftreatment interceptors (e.g., swirl separators and sand filters) 

may be appropriate in some instances to minimize the discharge of 

pollutants. 

5. Technology-Based Effluent Limits (BPT/BAT/BCT): Non-Numeric 

Effluent Limits 

a. Minimize Exposure 

Minimize the exposure of raw, final, or waste materials to rain, 
Page 70 of 139 

Permit No. IN0000281 

snow, snowmelt, and runoff. To the extent technologically 

available and economically practicable and achievable, either 

locate industrial materials and activities inside or protect them with 

storm resistant coverings in order to minimize exposure to rain, 

snow, snowmelt, and runoff (although significant enlargement of 

impervious surface area is not recommended). In minimizing 

exposure, pay particular attention to the following areas: 

Loading and unloading areas: locate in roofed or covered 

areas where feasible; use grading, benning, or curbing 

around the loading area to divert run-on; locate the loading 

and unloading equipment and vehicles so that leaks are 

contained in existing containment and flow diversion 

systems. 

Material storage areas: locate indoors, or in roofed or 

covered areas where feasible; install berms/dikes around 

these areas; use dry cleanup methods. 

Note: Industrial materials do not need to be enclosed or covered if stonnwater 

runoff from affected areas will not be discharged to receiving waters. 

b. Good Housekeeping 

Keep clean all exposed areas that are potential sources of 

pollutants, using such measures as sweeping at regular intervals, 

keeping materials orderly and labeled, and stowing materials in 

appropriate containers. 

As part of the developed good housekeeping program, include a 

cleaning and maintenance program for all impervious areas of the 

facility where particulate matter, dust, or debris may accumulate, 

especially areas where material loading and unloading, storage, 

handling, and processing occur; and where practicable, the paving 

of areas where vehicle traffic or material storage occur but where 

vegetative or other stabilization methods are not practicable 

(institute a sweeping program in these areas too). For unstabilized 

areas where sweeping is not practicable, consider using stonnwater 

management devices such as sediment traps, vegetative buffer 

strips, filter fabric fence, sediment filtering boom, gravel outlet 

protection, or other equivalent measures that effectively trap or 

remove sediment.