STATE OF MISSOURI 

DEPARTMENT OF NATURAL RESOURCES 

MISSOURI CLEAN WATER COMMISSION 

MISSOURI STATE OPERATING PERMIT 

In compliance with the Missouri Clean Water Law, (Chapter 644 R.S. Mo. as amended, hereinafter, the Law), and the Federal Water

Pollution Control Act (Public Law 92-500, 92nd Congress) as amended, 

Permit No. MO-0001121 

Owner: The Doe Run Company 

Address: 1801 Park 270 Place, Suite 300, St. Louis, MO 63146 

Continuing Authority: Same as above 

Address: Same as above 

Facility Name: Doe Run, Glover Smelter 

Address: Route 1, Box 60, Annapolis, MO 63620 

Legal Description: NW 1⁄4, Sec. 11, T32N, R3E, Iron County 

Latitude/Longitude: Outfall 001: +3728537/-09041312 

Outfall 002: +3728478/-09041259 

Outfall 003: +3728491/-09041309 

Receiving Stream: Scoggins Branch (U) 

First Classified Stream and ID: Big Creek (P)(02916) 

USGS Basin & Sub-watershed No.: (08020202-040001) 

is authorized to discharge from the facility described herein, in accordance with the effluent limitations and monitoring requirements 

as set forth herein: 

FACILITY DESCRIPTION 

See page 2 

This permit authorizes only wastewater discharges under the Missouri Clean Water Law and the National Pollutant Discharge 

Elimination System; it does not apply to other regulated areas. This permit may be appealed in accordance with Section 644.051.6 of 

the Law. 

 March 23, 2007 Effective Date Doyle Childers, Director, Department of Natural Resources 

 Executive Secretary, Clean Water Commission 

March 22, 2012 Expiration Date Edward Galbraith, Director of Staff, Clean Water Commission 

MO 780-0041 (10-93) 
 

Page 2 of 12 

 Permit No. MO-0001121 

FACILITY DESCRIPTION (continued) 

Outfall #001 - SIC #3339 

Internal monitoring point, discharge from the sanitary waste extended aeration plant. This includes flow from employee hand wash, 

and respirator wash (categorical flows), and employee showers (non-categorical flow). Wastewater then flows to outfall 003 for

metals treatment. Sludge disposal is by contract hauler. 

Design population equivalent is 300. 

Design flow is 30,000 gallons per day. 

Actual flow is 12,000 gallons per day 

Design sludge production is 6.0 dry tons per year. 

Outfall #002 - SIC #3339 

Non-contact cooling water. 

Design flow is 320,000 gallons per day. 

Actual flow is 290,000 gallons per day. 

Outfall #003 - SIC #3339 

Stormwater, process water, and sanitary water is captured in a holding basin and then treated in a wastewater plant with a design 

capacity of 288,000 gallons per day. The treatment consists of the following unit processes: 

1. pH adjustment with lime 

2. Sedimentation 

3. Clarification 

4. Filtration 

5. Sludge thickening/dewatering 

Total design flow into the storage basin is 638,000 GPD. 

Water Quality Monitoring Point #004 – Downstream monitoring point on Big Creek 

Legal Description: NW 1⁄4, Sec. 11, T32N, R3E, Iron County 

Latitude/Longitude: +3728241/-09041169 

Receiving Stream: Big Creek (P)(02916) 

USGS Basin & Sub-watershed No.: (08020202-040001) 

Outfall #005 – at Parshall Flume below Outfalls #001, 002, and 003. 

Monitoring to determine contributions from all sources at the facility combined. 

Legal Description: NW 1⁄4, Sec. 11, T32N, R3E, Iron County 

Latitude/Longitude: +3728477/-09041260 

Receiving Stream: Scoggins Branch (U) 

First Classified Stream and ID: Big Creek (P)(02916) 

USGS Basin & Sub-watershed No.: (08020202-040001) 

Outfall #006 – Emergency discharge from holding basin at wastewater treatment facility (outfall 003) 

Flow is dependent on precipitation 

Outfall S1 – Upstream Monitoring Point on Big Creek. 

Legal Description: SW 1⁄4, SW 1⁄4, Sec. 35, T33N, R3E, Iron County 

Latitude/Longitude: +3730016/-09041340 

Receiving Stream: Scoggins Branch (U) 

First Classified Stream and ID: Big Creek (P)(02916) 

USGS Basin & Sub-watershed No.: (08020202-040001) 

Downstream Monitoring Point – Deleted 
PAGE NUMBER 3 of 12 

A. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS PERMIT NUMBER MO-0001121 

The permittee is authorized to discharge from outfall(s) with serial number(s) as specified in the application for this permit. The interim effluent 

limitations shall become effective upon issuance and remain in effect until three (3) years from the date of issuance of this permit. Such discharges shall 

be controlled, limited and monitored by the permittee as specified below: 

INTERIM EFFLUENT LIMITATIONS MONITORING REQUIREMENTS 

OUTFALL NUMBER AND EFFLUENT 

PARAMETER(S) UNITS 

DAILY 

MAXIMUM 

WEEKLY 

AVERAGE 

MONTHLY 

AVERAGE 

MEASUREMENT SAMPLE 

FREQUENCY TYPE 

Outfall #002

Flow 

Lead, Total Recoverable 

Copper, Total Recoverable 

Cadmium, Total Recoverable 

Zinc, Total Recoverable 

Chlorine, Total Residual 

Temperature 

pH - Units 

Thallium, Total Recoverable 

MGD 

μg/L 

μg/L 

μg/L 

μg/L 

mg/L 

o

C 

SU 

μg/L 

* 

36 

46 

18 

460 

* 

**** 

*** 

56 

36 

46 

18 

460 

* 

56 

once/month 24 hr. total 

once/month grab 

once/month grab 

once/month grab 

once/month grab 

once/month grab 

once/month grab 

once/month grab 

once/month grab 

MONITORING REPORTS SHALL BE SUBMITTED MONTHLY; THE FIRST REPORT IS DUE May 28, 2007. THERE SHALL BE NO 

DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS. 

Outfall #003 

Flow 

Lead, Total Recoverable 

Streamflow > 8 cfs 

< 8 cfs 

Zinc, Total Recoverable 

Streamflow > 8 cfs 

< 8 cfs 

Cadmium, Total Recoverable 

Streamflow > 8 cfs 

< 8 cfs 

Thallium, Total Recoverable 

Streamflow > 8 cfs 

< 8 cfs 

Total Suspended Solids 

Total Suspended Solids 

MGD 

lbs/day 

mg/L 

mg/L 

lbs/day 

mg/L 

mg/L 

lbs/day 

mg/L 

mg/L 

mg/L 

mg/L 

lbs/day 

mg/L 

* 

0.673 

0.080 

0.027 

2.452 

2.05 

0.34 

0.481 

0.046 

0.013 

0.176 

0.011 

36.056 

* 

* 

0.264 

0.080 

0.027 

0.745 

1.4 

0.34 

0.192 

0.046 

0.013 

0.176 

0.011 

24.036 

* 

daily 24 hr. total 

once/month grab 

once/month grab 

once/month grab 

once/month grab 

once/month grab 

once/month grab 

once/month grab 

once/month grab 

once/month grab 

once/month grab 

once/month grab 

once/month grab 

once/month grab

MONITORING REPORTS SHALL BE SUBMITTED MONTHLY; THE FIRST REPORT IS DUE May 28, 2007. 

Outfall 003

Whole Effluent Toxicity (WET) Test % Survival See Special Condition #11 four/year 24 hr. composite

MONITORING REPORTS SHALL BE SUBMITTED QUARTERLY; THE FIRST REPORT IS DUE July 28, 2007. THERE SHALL BE NO 

DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS. 

 MO 780-0010 (8/91) 
PAGE NUMBER 4 of 12 

A. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS PERMIT NUMBER MO-0001121 

The permittee is authorized to discharge from outfall(s) with serial number(s) as specified in the application for this permit. The final effluent 

limitations shall become effective three (3) years from the date of issuance of this permit and remain in effect until expiration of the permit. Such 

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

FINAL EFFLUENT LIMITATIONS MONITORING REQUIREMENTS OUTFALL NUMBER AND EFFLUENT 

PARAMETER(S) UNITS 

DAILY 

MAXIMUM 

WEEKLY 

AVERAGE 

MONTHLY 

AVERAGE 

MEASUREMENT SAMPLE 

FREQUENCY TYPE 

Outfall #002

Flow 

Lead, Total Recoverable 

Copper, Total Recoverable (Note 2) 

Cadmium, Total Recoverable (Note 2) 

Zinc, Total Recoverable (Note 2) 

Chlorine, Total Residual 

Temperature 

pH – Units 

Thallium, Total Recoverable 

MGD 

μg/L 

μg/L 

μg/L 

μg/L 

μg/L 

o

C 

SU 

μg/L 

* 

* 

6.8 

* 

* 

16.5 

**** 

****** 

10.3 

* 

3.4 

* 

* 

8.2 

**** 

****** 

5.1 

once/month 24 hr. total 

once/month grab 

once/month grab 

once/month grab 

once/month grab 

once/month grab 

once/month grab 

once/month grab 

once/month grab 

MONITORING REPORTS SHALL BE SUBMITTED MONTHLY; THE FIRST REPORT IS DUE May 28, 2010. THERE SHALL BE NO 

DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS. 

Outfall #003 

Flow 

Lead, Total Recoverable 

Lead, Total Recoverable 

Zinc, Total Recoverable 

Zinc, Total Recoverable 

Cadmium, Total Recoverable 

Cadmium, Total Recoverable 

Thallium, Total Recoverable 

Copper, Total Recoverable 

Selenium, Total Recoverable 

Total Suspended Solids 

Biochemical Oxygen Demand 

pH 

MGD 

lbs/day 

μg/L 

lbs/day 

μg/L 

lbs/day 

μg/L 

μg/L 

μg/L 

μg/L 

lbs/day 

mg/L 

mg/L 

SU 

* 

0.012 

6.0 

0.512 

218 

0.001 

0.52 

10.3 

11.8 

8.1 

36.056 

* 

*** 

45 

* 

2.9 

109 

0.26 

5.1 

5.9 

4.0 

24.036 

30 

* 

*** 

daily 24 hr. total 

once/month grab 

once/month grab 

once/month grab 

once/month grab 

once/month grab 

once/month grab 

once/month grab 

once/month grab 

once/month grab 

once/month grab 

once/month grab 

once/month grab 

once/month grab

MONITORING REPORTS SHALL BE SUBMITTED MONTHLY; THE FIRST REPORT IS DUE May 28, 2010. 

Outfall 003

Whole Effluent Toxicity (WET) Test % Survival See Special Condition #11 four/year 24 hr. composite

MONITORING REPORTS SHALL BE SUBMITTED QUARTERLY; THE FIRST REPORT IS DUE July 28, 2010 . THERE SHALL BE NO 

DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS. 

 MO 780-0010 (8/91) 
PAGE NUMBER 5 of 12 

A. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS PERMIT NUMBER MO-0001121 

The permittee is authorized to discharge from outfall(s) with serial number(s) as specified in the application for this permit. The final effluent 

limitations shall become effective upon issuance and remain in effect until expiration of the permit. Such discharges shall be controlled, limited and 

monitored by the permittee as specified below: 

FINAL EFFLUENT LIMITATIONS MONITORING REQUIREMENTS 

OUTFALL NUMBER AND EFFLUENT 

PARAMETER(S) UNITS 

DAILY 

MAXIMUM 

WEEKLY 

AVERAGE 

MONTHLY 

AVERAGE 

MEASUREMENT SAMPLE 

FREQUENCY TYPE 

Outfall #001

Flow 

Chlorine, Total Residual 

Total Suspended Solids 

Total Suspended Solids 

Lead, Total Recoverable 

Lead, Total Recoverable 

Zinc, Total Recoverable 

Zinc, Total Recoverable 

Cadmium, Total Recoverable 

Cadmium, Total Recoverable 

Fecal Coliform** 

Biochemical Oxygen Demand5

pH - Units 

Copper, Total Recoverable 

Thallium, Total Recoverable 

Hardness 

Ammonia as Nitrogen 

(May 1-Oct 31) 

(Nov 1-April 30) 

MGD 

μg/L 

 

lbs/day 

mg/L 

lbs/day 

μg/L 

lbs/day 

μg/L 

lbs/day 

μg/L 

#/100mL 

mg/L 

SU 

μg/L 

μg/L 

mg/L 

mg/L 

* 

16.5 

1.467 

0.0046 

* 

0.0169 

* 

0.0033 

* 

1000 

*** 

* 

* 

* 

3.7 

7.5 

45 

45 

* 

8.2 

0.930 

30 

0.0019 

* 

0.00578 

* 

0.0013 

* 

400 

30 

*** 

* 

* 

* 

1.9 

3.7 

once/quarter 24 hr. total 

once/quarter***** grab 

once/quarter***** grab 

once/quarter***** grab 

once/quarter***** grab 

once/quarter***** grab 

once/quarter***** grab 

once/quarter***** grab 

once/quarter***** grab 

once/quarter***** grab 

once/quarter***** grab 

once/quarter***** grab 

once/quarter***** grab 

once/quarter***** grab 

once/quarter***** grab 

once/quarter***** grab 

once/quarter***** grab 

MONITORING REPORTS SHALL BE SUBMITTED QUARTERLY; THE FIRST REPORT IS DUE July 28, 2007. THERE SHALL BE NO 

DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS. 

 MO 780-0010 (8/91) 
PAGE NUMBER 6 of 12 

A. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS PERMIT NUMBER MO-0001121 

The permittee is authorized to discharge from outfall(s) with serial number(s) as specified in the application for this permit. The final effluent 

limitations shall become effective upon issuance and remain in effect until expiration of the permit. Such discharges shall be controlled, limited and 

monitored by the permittee as specified below: 

FINAL EFFLUENT LIMITATIONS MONITORING REQUIREMENTS 

OUTFALL NUMBER AND EFFLUENT 

PARAMETER(S) UNITS 

DAILY 

MAXIMUM 

WEEKLY 

AVERAGE 

MONTHLY 

AVERAGE 

MEASUREMENT SAMPLE 

FREQUENCY TYPE 

Outfall #004 & S1

Temperature (Note 1) 

pH – Units 

Hardness 

Lead, Total Recoverable 

Zinc, Total Recoverable 

Cadmium, Total Recoverable 

Copper, Total Recoverable 

Selenium, Total Recoverable 

Thallium, Total Recoverable 

°C 

SU 

mg/L 

μg/L 

μg/L 

μg/L 

μg/L 

μg/L 

μg/L 

* 

* 

* 

* 

* 

* 

* 

* 

* 

* 

* 

* 

* 

* 

* 

* 

* 

* 

once/month grab 

once/quarter***** grab 

once/quarter***** grab 

once/quarter***** grab 

once/quarter***** grab 

 

once/quarter ***** grab 

once/quarter ***** grab 

once/quarter***** grab 

 

once/quarter ***** grab

MONITORING REPORTS SHALL BE SUBMITTED QUARTERLY; THE FIRST REPORT IS DUE July 28, 2007. THERE SHALL BE NO 

DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS. 

Outfall 005

Flow 

Hardness 

Temperature 

pH - Units 

Lead, Total Recoverable 

Zinc, Total Recoverable 

Cadmium, Total Recoverable 

Thallium, Total Recoverable 

Selenium, Total Recoverable 

Copper, Total Recoverable 

MGD 

mg/L 

°C 

SU 

μg/L 

μg/L 

μg/L 

μg/L 

μg/L 

μg/L 

* 

* 

* 

* 

* 

* 

* 

* 

* 

* 

* 

* 

* 

* 

* 

* 

* 

* 

* 

* 

once/month 24 hr. estimate 

once/month grab 

once/month grab 

once/month grab 

once/month grab 

once/month grab 

once/month grab 

once/month grab 

once/month grab 

once/month grab 

MONITORING REPORTS SHALL BE SUBMITTED MONTHLY; THE FIRST REPORT IS DUE May 28, 2007. THERE SHALL BE NO 

DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS. 

 MO 780-0010 (8/91) 
PAGE NUMBER 7 of 12 

A. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS PERMIT NUMBER MO-0001121 

The permittee is authorized to discharge from outfall(s) with serial number(s) as specified in the application for this permit. The final effluent limitations 

shall become effective upon issuance and remain in effect until expiration of the permit. Such discharges shall be controlled, limited and monitored by 

the permittee as specified below: 

FINAL EFFLUENT LIMITATIONS MONITORING REQUIREMENTS 

OUTFALL NUMBER AND EFFLUENT 

PARAMETER(S) UNITS 

DAILY 

MAXIMUM 

WEEKLY 

AVERAG

E 

MONTHLY 

AVERAGE 

MEASUREMENT SAMPLE 

FREQUENCY TYPE 

Outfall #006 – Emergency discharge from retention basin 

Flow 

Lead, Total Recoverable 

Lead, Total Recoverable 

Zinc, Total Recoverable 

Zinc, Total Recoverable 

Cadmium, Total Recoverable 

Cadmium, Total Recoverable 

Thallium, Total Recoverable 

Selenium, Total Recoverable 

Total Suspended Solids 

Total Suspended Solids 

Biochemical Oxygen Demand 

pH 

MGD 

lbs/day 

μg/L 

lbs/day 

μg/L 

lbs/day 

μg/L 

μg/L 

μg/L 

lbs/day 

mg/L 

mg/L 

SU 

* 

0.012

6.0 

0.512

218 

0.001

0.52 

10.3 

8.1 

36.056 

* 

*** 

* 

2.9 

109 

0.192 

0.26 

5.1 

4.0 

24.036 

30 

* 

*** 

once/discharge/day 24 hr. estimate 

once/discharge/day grab 

once/discharge/day grab 

once/discharge/day grab 

once/discharge/day grab 

once/discharge/day grab 

once/discharge/day grab 

once/discharge/day grab 

once/discharge/day grab 

once/discharge/day grab 

once/discharge/day grab 

once/discharge/day grab 

once/discharge/day grab

MONITORING REPORTS SHALL BE SUBMITTED MONTHLY; THE FIRST REPORT IS DUE May 28, 2007 . THERE SHALL BE NO 

DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS. 

B. STANDARD CONDITIONS 

IN ADDITION TO SPECIFIED CONDITIONS STATED HEREIN, THIS PERMIT IS SUBJECT TO THE ATTACHED Parts I & III STANDARD 

CONDITIONS DATED October 1, 1980, AND HEREBY INCORPORATED AS THOUGH FULLY SET FORTH HEREIN. 

 MO 780-0010 (8/91)

 

 

A. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (continued) 

 * Monitoring requirement only. 

 ** Final limitations and monitoring requirements for Fecal Coliform are applicable only during the recreational season from 

April 1 through October 31. Sample in June and September. 

 *** pH is measured in pH units and is not to be averaged. The pH is limited to the range of 7.5-9.0 pH units. 

   Effluent shall not elevate or depress the temperature of the receiving stream beyond the mixing zone more than five (5°)F. 

The stream temperature beyond the mixing zone shall not exceed eighty-four (84°)F due to the effluent. 

 ** *** Sample once per quarter in the months of March, June, September, and December. 

 ****** pH is measured in pH units and is not to be averaged. The pH is limited to the range of 6.5-9.0 pH units. 

Note 1 – The monthly upstream and downstream sample for Temperature will be taken on the same day as Outfalls #003, #004, and 

#005 are sampled. 
Page 8 of 12 

Permit No. MO-0001121 

Note 2 – Effluent limits for Cadmium, Lead and Zinc from outfall 002 are set at 0.0 μg/L. Results above the detection limits are to be 

considered effluent limit violations. Results below detection limits are considered in compliance. The detection limits for these 

parameters are: Cadmium = 0.1 μg/L, Lead = 1.0 μg/L, and Zinc = 5 μg/L. Cadmium and Lead are to be analyzed by Electrothermal 

Atomization Atomic Absorption, Standard Methods 3113B; Zinc is to be analyzed by Flame Atomic Absorption Spectrometry, 

Standard Methods 3111.

C. SPECIAL CONDITIONS

1. This permit may be reopened and modified, or alternatively revoked and reissued, to: 

(a) Comply with any applicable effluent standard or limitation issued or approved under Sections 301(b)(2)(C) and (D), 

304(b)(2), and 307(a) (2) of the Clean Water Act, if the effluent standard or limitation so issued or approved: 

(1) contains different conditions or is otherwise more stringent than any effluent limitation in the permit; or 

(2) controls any pollutant not limited in the permit. 

(b) Incorporate new or modified effluent limitations or other conditions, if the result of a waste load allocation study, 

toxicity test or other information indicates changes are necessary to assure compliance with Missouri’s Water Quality 

Standards. 

(c) Incorporate new or modified effluent limitations or other conditions if, as the result of a watershed analysis, a Total 

Maximum Daily Load (TMDL) limitation is developed for the receiving waters which are currently included in 

Missouri’s list of waters of the state not fully achieving the state’s water quality standards, also called the 303(d) list. 

The permit as modified or reissued under this paragraph shall also contain any other requirements of the Clean Water Act then 

applicable. 

2. All outfalls must be clearly marked in the field. 

3. Changes in Discharges of Toxic Substances 

The permittee shall notify the Director as soon as it knows or has reason to believe: 

(a) That any activity has occurred or will occur which would result in the discharge of any toxic pollutant which is not 

limited in the permit, if that discharge will exceed the highest of the following "notification levels:" 

(1) One hundred micrograms per liter (100 μg/L); 

(2) Two hundred micrograms per liter (200 μg/L) for acrolein and acrylonitrile; five hundred micrograms per liter 

(500 μg/L) for 2,5 dinitrophenol and for 2-methyl-4, 6-dinitrophenol; and one milligram per liter (1 mg/L) for 

antimony; 

(3) Five (5) times the maximum concentration value reported for the pollutant in the permit application; 

(4) The level established in Part A of the permit by the Director. 

(b) That they have begun or expect to begin to use or manufacture as an intermediate or final product or byproduct any toxic 

pollutant, which was not reported in the permit application. 

4. Report as no-discharge when a discharge does not occur during the report period. 

5. Sludge and Biosolids Use For Domestic Wastewater Treatment Facilities 

(a) Permittee shall comply with the pollutant limitations, monitoring, reporting, and other requirements in accordance with 

the attached permit Standard Conditions. 

(b) If sludge is not removed by a contract hauler, permittee is authorized to land apply biosolids. Permit Standard 

Conditions, Part III shall apply to the land application of biosolids. The department may require submittal of a biosolids 

management plan for department review and approval as determined appropriate on a case-by-case basis. 

6. Because the permittee does not discharge effluent from Outfall #001 and instead pumps that effluent to the stormwater basin for

further treatment to remove metals, the permittee must test for Biochemical Oxygen Demand5 and Fecal Coliform prior to 

commingling this effluent with the stormwater. The limits for Biochemical Oxygen Demand5 and Fecal Coliform shall be the 

same as for the effluent had it been discharged for Outfall #001. This data must be reported with the discharge monitoring 

reports for Outfall #003. The permittee will report no discharge from Outfall #001 if none has occurred from Outfall #001 

during the month. 

7. If monitoring data indicates that water quality standards are being exceeded at water quality monitoring point #004, Outfall 

#005, or the downstream monitoring point, this permit may be reopened and modified to establish limits to protect water quality

at any of the above points. 
Page 9 of 12 

Permit No. MO-0001121 

C. SPECIAL CONDITIONS (continued) 

8. Water Quality Standards 

(a) Discharges to waters of the state shall not cause a violation of water quality standards rule under 10 CSR 20-7.031, 

including both specific and general criteria. 

(b) General Criteria. The following general water quality criteria shall be applicable to all waters of the state at all times 

including mixing zones. No water contaminant, by itself or in combination with other substances, shall prevent the 

waters of the state from meeting the following conditions: 

(1) Waters shall be free from substances in sufficient amounts to cause the formation of putrescent, unsightly or 

harmful bottom deposits or prevent full maintenance of beneficial uses; 

(2) Waters shall be free from oil, scum and floating debris in sufficient amounts to be unsightly or prevent full 

maintenance of beneficial uses; 

(3) Waters shall be free from substances in sufficient amounts to cause unsightly color or turbidity, offensive odor or 

prevent full maintenance of beneficial uses; 

(4) Waters shall be free from substances or conditions in sufficient amounts to result in toxicity to human, animal or 

aquatic life; 

(5) There shall be no significant human health hazard from incidental contact with the water; 

(6) There shall be no acute toxicity to livestock or wildlife watering; 

(7) Waters shall be free from physical, chemical or hydrologic changes that would impair the natural biological 

community; 

(8) Waters shall be free from used tires, car bodies, appliances, demolition debris, used vehicles or equipment and 

solid waste as defined in Missouri's Solid Waste Law, section 260.200, RSMo, except as the use of such materials 

is specifically permitted pursuant to section 260.200-260.247. 

9. Any sludge removed shall be processed through the smelting process, or the Missouri Department of Natural Resources shall be 

contacted for approval of the alternate disposal proposal. 

10. A Quality assurance/Quality control (QA/QC) plan shall be maintained for samples analyzed by the permittee, and QA/QC 

plans submitted for any other laboratories which will be used to fulfill monitoring requirements. 

11. By January 31st of each year starting in 1999, Doe Run shall submit a report to the Southeast Regional office, the Water 

Pollution Control Program (WPCP) - Central Office, and United States Environmental Protection Agency (EPA) Region VII 

that reports in tabular form the data from Outfalls S1, #004, and #005 from the previous year or partial year. 

The report shall compare the data with the appropriate water quality standards for each of the above monitoring points and 

shall indicate whether the standard was met or exceeded. The data from each of the above points shall include concentration of

pollutants, flow, and mass of pollutants in pounds per day. The report is due January 31st of each year. 

12. Whole Effluent Toxicity (WET) tests shall be conducted as follows: 

SUMMARY OF WET TESTING FOR THIS PERMIT 

OUTFALL A.E.C. % FREQUENCY SAMPLE TYPE MONTHS 

#003 100% Once/quarter 24 hr. composite or grab March, June, 

August, November 

(a) Test Schedule and Follow-Up Requirements 

(1) Perform a SINGLE-dilution test in the months and at the frequency specified above. For tests which are 

successfully passed, submit test results USING THE DEPARTMENT’S WET TEST REPORT FORM #MO-780-

1899 along with complete copies of the test reports as received from the laboratory, including copies of chain-ofcustody forms within 30 calendar days of availability to the WATER PROTECTION PROGRAM, P.O. Box 176, 

Jefferson City, MO 65102. If the effluent passes the test, do not repeat the test until the next test period. 

(a) For discharges of stormwater, samples shall be collected within three hours from when discharge first 

occurs. 

(b) Samples submitted for analysis of stormwater discharges shall be collected as a grab. 
Page 10 of 12 

Permit No. MO-0001121 

C. SPECIAL CONDITIONS (continued) 

(c) For discharges of non-stormwater, samples shall be collected only when precipitation has not occurred for a 

period of forty-eight hours prior to sample collection. In no event shall sample collection occur 

simultaneously with the occurrence of precipitation excepting for stormwater samples. 

(d) A twenty-four hour composite sample shall be submitted for analysis of non-stormwater discharges. 

(e) Upstream receiving water samples, where required, shall be collected upstream from any influence of the 

effluent where downstream flow is clearly evident. 

(f) Samples submitted for analysis of upstream receiving water may be collected as either a grab or twentyfour-hour composite as appropriate to the nature of the discharge. 

(g) Chemical and physical analysis of the upstream control and effluent sample shall occur immediately upon 

being received by the laboratory, prior to any manipulation of the effluent sample beyond preservation 

methods consistent with federal guidelines for WET testing that are required to stabilize the sample during 

shipping. 

(h) Any and all chemical or physical analysis of the effluent sample performed in conjunction with the WET 

test shall be performed at the 100% Effluent concentration in addition to analyses performed upon any 

other effluent concentration. 

(i) All chemical analyses included in the Missouri Department of Natural Resources WET test report form 

#MO-780-1899 shall be performed and results shall be recorded in the appropriate field of the report form. 

(j) Where flow-weighted composite sample is required for analysis, the samples shall be composited at the 

laboratory where the test is to be performed. 

(k) Where in stream testing is required downstream from the discharge, sample collection shall occur 

immediately below the established Zone of Initial Dilution in conjunction with or immediately following a 

release or discharge. 

(l) Samples submitted for analysis of downstream receiving water may be collected as either a grab or twentyfour-hour composite as appropriate to the nature of the discharge. 

(m) All instream samples, including downstream samples, shall be tested for toxicity at the 100% concentration 

in addition to any other assigned AEC for in-stream samples. 

(2) All failing test results along with complete copies of the test reports as received from the laboratory, INCLUDING 

THOSE TESTS CONDUCTED UNDER CONDITION (3) BELOW, shall be reported to the WATER 

PROTECTION PROGRAM, P.O. Box 176, Jefferson City, MO 65102 within 14 calendar days of the availability 

of the results. 

(3) If the effluent fails the test, a multiple dilution test shall be performed within 30 calendar days and biweekly 

thereafter, until one of the following conditions are met: 

(a) THREE CONSECUTIVE MULTIPLE-DILUTION TESTS PASS. No further tests need to be performed 

until next regularly scheduled test period. 

(b) A TOTAL OF THREE MULTIPLE-DILUTION TESTS FAIL. 

(4) Failure of at least two multiple-dilution tests during any period of accelerated monitoring violates the permit 

narrative requirement for aquatic life protection. 

(5) The permittee shall submit a CONCISE summary of all test results for the test series to the WATER 

PROTECTION PROGRAM, P.O. Box 176, Jefferson City, MO 65102 within 14 calendar days of the third failed 

test. 

(6) Additionally, the following shall apply upon failure of the third MULTIPLE DILUTION test: A toxicity 

identification evaluation (TIE) or toxicity reduction evaluation (TRE) is automatically triggered. The permittee 

shall contact THE WATER PROTECTION PROGRAM within 14 calendar days from availability of the test 

results to ascertain as to whether a TIE or TRE is appropriate. The permittee shall submit a plan for conducting a 

TIE or TRE to the WATER PROTECTION PROGRAM within 60 calendar days of the date of DNR's direction to 

perform either a TIE or TRE. This plan must be approved by DNR before the TIE or TRE is begun. A schedule 

for completing the TIE or TRE shall be established in the plan approval. 

(7) Upon DNR's approval, the TIE/TRE schedule may be modified if toxicity is intermittent during the TIE/TRE 

investigations. A revised WET test schedule may be established by DNR for this period. 

(8) If a previously completed TIE has clearly identified the cause of toxicity, additional TIEs will not be required as 

long as effluent characteristics remain essentially unchanged and the permittee is proceeding according to a DNR 

approved schedule to complete a TRE and reduce toxicity. Regularly scheduled WET testing as required in the 

permit, without the follow-up requirements, will be required during this period. 

(9) When WET test sampling is required to run over one DMR period, each DMR report shall contain a copy of the 

Department’s WET test report form that was generated during the reporting period. 

(10) Submit a concise summary in tabular format of all test results with the annual report. 

 
Page 11 of 12 

Permit No. MO-0001121 

C. SPECIAL CONDITIONS (continued) 

(b) PASS/FAIL procedure and effluent limitations: 

(1) To pass a single-dilution test, mortality observed in the AEC test concentration shall not be significantly different 

(at the 95% confidence level; p = 0.05) than that observed in the upstream receiving-water control sample. Where 

upstream receiving water is not available mortality observed in the AEC test concentration shall not be 

significantly different (at the 95% confidence level; p = 0.05) than that observed in the laboratory control. The 

appropriate statistical tests of significance shall be consistent with the most current edition of METHODS FOR 

MEASURING THE ACUTE TOXICITY OF EFFLUENTS AND RECEIVING WATERS TO FRESHWATER 

AND MARINE ORGANISMS or other Federal guidelines as appropriate or required. 

(2) To pass a multiple-dilution test: 

(a) For facilities with a computed percent effluent at the edge of the zone of initial dilution, Allowable Effluent 

Concentration (AEC), OF 30% OR LESS THE AEC must be less than three-tenths (0.3) of the LC50

concentration for the most sensitive of the test organisms; OR, 

(b) For facilities with an AEC greater than 30% the LC50 concentration must be greater than 100%; AND, 

(c) all effluent concentrations equal to or less than the AEC must be nontoxic. Mortality observed in all 

effluent concentrations equal to or less than the AEC shall not be significantly different (at the 95% 

confidence level; p = 0.05) than that observed in the upstream receiving-water control sample. Where 

upstream receiving water is not available mortality observed in the AEC test concentration shall not be 

significantly different (at the 95% confidence level; p = 0.05) than that observed in the laboratory control. 

The appropriate statistical tests of significance shall be consistent with the most current edition of 

METHODS FOR MEASURING THE ACUTE TOXICITY OF EFFLUENTS AND RECEIVING 

WATERS TO FRESHWATER AND MARINE ORGANISMS or other federal guidelines as appropriate or 

required. Failure of one multiple-dilution test may be considered an effluent limit violation. 

(c) Test Conditions 

(1) Test Type: Acute Static non-renewal 

(2) Test species: Ceriodaphnia dubia and Pimephales promelas (fathead minnow). Organisms used in WET testing 

shall come from cultures reared for the purpose of conducting toxicity tests and cultured in a manner consistent 

with the most current USEPA guidelines. All test animals shall be cultured as described in the most current 

edition of METHODS FOR MEASURING THE ACUTE TOXICITY OF EFFLUENTS AND RECEIVING 

WATERS TO FRESHWATER AND MARINE ORGANISMS. 

(3) Test period: 48 hours at the "Acceptable Effluent Concentration" (AEC) specified above. 

(4) When dilutions are required, upstream receiving stream water shall be used as dilution water. If upstream water is 

unavailable or if mortality in the upstream water exceeds 10%, "reconstituted" water will be used as dilution 

water. Procedures for generating reconstituted water will be supplied by the MDNR upon request. 

(5) Single-dilution tests will be run with: 

(a) Effluent at the AEC concentration; 

(b) 100% receiving-stream water (if available), collected upstream of the outfall at a point beyond any 

influence of the effluent; and 

(c) reconstituted water. 

(6) Multiple-dilution tests will be run with: 

(a) 100%, 50%, 25%, 12.5%, and 6.25% effluent, unless the AEC is less than 25% effluent, in which case 

dilutions will be 4 times the AEC, two times the AEC, AEC, 1/2 AEC and 1/4 AEC; 

(b) 100% receiving-stream water (if available), collected upstream of the outfall at a point beyond any 

influence of the effluent; and 

(c) reconstituted water. 

(7) If reconstituted-water control mortality for a test species exceeds 10%, the entire test will be rerun. 

(8) If upstream control mortality exceeds 10%, the entire test will be rerun using reconstituted water as the dilutant. 
Page 12 of 12 

Permit No. MO-0001121 

SUMMARY OF TEST METHODOLOGY FOR WHOLE-EFFLUENT TOXICITY TESTS 

Whole-effluent-toxicity test required in NPDES permits shall use the following test conditions when performing single or multiple 

dilution methods. Any future changes in methodology will be supplied to the permittee by the Missouri Department of Natural 

Resources (MDNR). Unless more stringent methods are specified by the DNR, the procedures shall be consistent with the most 

current edition of Methods for Measuring the Acute Toxicity of Effluents and Receiving Waters to Freshwater and Marine Organisms, 

Test conditions for Ceriodaphnia dubia:

Test duration: 48 h 

Temperature: 25 ± 1°C Temperatures shall not deviate by more than 3°C during 

the test. 

Light Quality: Ambient laboratory illumination 

Photoperiod: 16 h light, 8 h dark 

Size of test vessel: 30 mL (minimum) 

Volume of test solution: 15 mL (minimum) 

Age of test organisms: <24 h old 

No. of animals/test vessel: 5 

No. of replicates/concentration: 4 

No. of organisms/concentration: 20 (minimum) 

Feeding regime: None (feed prior to test) 

Aeration: None 

Dilution water: Upstream receiving water; if no upstream flow, synthetic water 

modified to reflect effluent hardness. 

Endpoint: Pass/Fail (Statistically significant Mortality when compared to 

upstream receiving water control or synthetic control if upstream 

water was not available at p< 0.05) 

Test acceptability criterion: 90% or greater survival in controls 

Test conditions for (Pimephales promelas): 

Test duration: 48 h 

Temperature: 25 ± 1°C Temperatures shall not deviate by more than 3°C during 

the test. 

Light Quality: Ambient laboratory illumination 

Photoperiod: 16 h light/ 8 h dark 

Size of test vessel: 250 mL (minimum) 

Volume of test solution: 200 mL (minimum) 

Age of test organisms: 1-14 days (all same age) 

No. of animals/test vessel: 10 

No. of replicates/concentration: 4 (minimum) single dilution method 

 2 (minimum) multiple dilution method 

No. of organisms/concentration: 40 (minimum) single dilution method 

 20 (minimum) multiple dilution method 

Feeding regime: None (feed prior to test) 

Aeration: None, unless DO concentration falls below 4.0 mg/L; rate should 

not exceed 100 bubbles/min. 

Dilution water: Upstream receiving water; if no upstream flow, synthetic water 

modified to reflect effluent hardness. 

Endpoint: Pass/Fail (Statistically significant Mortality when compared to 

upstream receiving water control or synthetic control if upstream 

water was not available at p< 0.05) 

Test Acceptability criterion: 90% or greater survival in controls 
Date of Fact Sheet: 10-19-06 

Date of Public Notice: 11-3-06 

NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) PERMIT 

FACT SHEET 

This Fact Sheet explains the applicable regulations, rationale for development of this permit and the public participation process. 

The Federal Water Pollution Control Act ("Clean Water Act" Section 402 Public Law 92-500 as amended) established the National 

Pollutant Discharge Elimination System (NPDES) permit program. This program regulates the discharge of pollutants from point 

sources into the waters of the United States, and the release of storm water from certain point sources. All such discharges are 

unlawful without a permit (Section 301 of the "Clean Water Act"). After a permit is obtained, a discharge not in compliance with all 

permit terms and conditions is unlawful. Permits in Missouri are issued by the Director of the Department of Natural Resources under 

an approved program, operating in accordance with federal and state laws (Federal "Clean Water Act" and "Missouri Clean Water 

Law" Section 644 as amended). 

NPDES PERMIT NUMBER: MO-0001121 

FACILITY NAME: Doe Run, Glover Smelter 

OWNER NAME: The Doe Run Company 

LOCATION: NW 1⁄4, Sec. 11, T32N, R3E, Iron County 

RECEIVING STREAM: Scroggins Branch (U), Big Creek (P) 

PURPOSE: Operating permit renewal, TMDL implementation 

FACILITY DESCRIPTION AND RATIONALE

The facility includes a smelter [not currently in operation], employee generated domestic wastewater, non-contact cooling water, and 

stormwater from the smelter grounds and slag piles. Wastewater flows to a holding basin, and is then run through a treatment facility 

to remove metals. The wastewater treatment facility consists of the following unit processes: 

1. pH adjustment with lime 

2. Sedimentation 

3. Clarification 

4. Filtration 

5. Sludge thickening/dewatering 

Domestic wastewater is first treated in an extended aeration plant before flowing to the holding basin for further treatment. 

10 CSR 20-7.031 Missouri Water Quality Standards, Missouri Department of Natural Resources (the Department) "defines the Clean 

Water Commission water quality objectives in terms of water uses to be maintained and the criteria to protect those uses." The

receiving stream's beneficial water uses to be maintained are livestock and wildlife watering, cool water 

fishery, whole body contact recreation, secondary contact recreation, and protection of 

aquatic life.

To protect these beneficial uses and the water quality of the receiving stream, effluent limitations have been established under federal 

and state laws. Please see the Water Quality Review Sheet Portion of this Fact Sheet for effluent limit derivation. 

The permit will be issued for a period of five years. 
Water Quality Review Sheet 

Determination of Effluent Limits

Facility Information FACILITY NAME: Glover Smelter NPDES #: MO-0001121 

 FACILITY TYPE/DESCRIPTION: Primary lead smelter and refining facility 

EDU: Ozark / Upper St. Francis / Castor Drainages 8-DIGIT HUC: 08020202 COUNTY: Iron 

EDU = Ecological Drainage Unit 

 

 LEGAL DESCRIPTION: NW 1⁄4, Sec. 11, T32N, R3E LATITUDE/LONGITUDE: +3728537/-09041312 

 WATER QUALITY HISTORY: Occasional exceedence of effluent limits. 

Outfall Characteristics 

OUTFALL DESIGN FLOW 

(CFS) 

TREATMENT TYPE RECEIVING WATERBODY

001 0.047 Secondary, then flows to 003 Scroggins Branch 

002 0.50 Non-contact cooling water Scroggins Branch 

003 0.45 Process wastewater, primary lead sub category Scroggins Branch 

004 Downstream monitoring 

Big Creek above confluence 

with Little Creek 

005 1.0 Monitoring of contributions from Oufalls 001-003 Scroggins Branch 

006 0.39 Emergency discharge from holding basin Scroggins Branch 

S1 Upstream monitoring 

Big Creek above confluence 

with Scroggins Branch 

Receiving Waterbody Information 

WATERBODY CLASS WBID 1Q10 (CFS) 7Q10 (CFS) 30Q10 (CFS) *DESIGNATED USES

Scroggins Branch U N.A. 0.0 0.0 0.0 General Criteria 

Big Creek P 2916 0.1 0.1 1.0 AQL, CLF, LWW, WBC, 

SCR

*Cool Water Fishery (CLF), Cold Water Fishery (CDF), Irrigation (IRR), Industrial (IND), Secondary Contact Recreation(SCR), Drinking Water Supply (DWS), Whole Body 

Contact Recreation (WBC), Protection of Warmwater Aquatic Life and Human Health (AQL), Livestock & Wildlife Watering (LWW)

COMMENTS: Big Creek is on the 303(d) list for Metals (Cadmium, Lead, Selenium, Thallium and Zinc). The 

source of the contamination is the Glover Smelter. Effluent limits in this WQRS were developed to 

alleviate the contamination. 

Outfall 001 flows to 003 for additional treatment before discharge. 

 

Missouri Department of Natural Resources 

Water Protection Program 

Water Pollution Control Branch 

NPDES Permits & Engineering Section 
MIXING CONSIDERATIONS 

Mixing Zone (MZ). Not allowed. 10 CSR 20-7.031(4)(A)4.B.(I)(a) 

Zone of Initial Dilution (ZID). Not allowed. 10 CSR 20-7.031(4)(A)4.B.(I)(b) 

Flow (cfs) MZ (cfs) ZID (cfs) 

7Q10 0.0 0.0 0.0 

1Q10 0.0 0.0 0.0 

30Q10 0.0 0.0 N/A 

Permit Limits And Information 

TMDL WATERSHED: (Y OR N) Y W.L.A. STUDY CONDUCTED: 

(Y OR N) Y DISINFECTION REQUIRED: USE ATTAINABILITY 

ANALYSIS (Y,N) Y (Y OR N) N 

OUTFALL# 001

WET TEST (Y OR N): N FREQUENCY: A.E.C. LIMIT: 

PARAMETER UNITS

MAXIMUM 

DAILY LIMIT

WEEKLY 

AVERAGE 

LIMIT

AVERAGE 

MONTHLY 

LIMIT

MONITORING 

FREQUENCY

FLOW MONITOR MONITOR DAILY

BIOCHEMICAL OXYGEN DEMAND (BOD5) mg/L 45 30 ONCE/QUARTER

TOTAL SUSPENDED SOLIDS mg/L 45 30 ONCE/QUARTER

TOTAL SUSPENDED SOLIDS lbs/day 1.467 0.930 ONCE/QUARTER

PH SU 7.5-9 7.5-9 ONCE/QUARTER

AMMONIA AS N mg/L 3.7 1.9 ONCE/QUARTER

AMMONIA AS N mg/L 7.5 3.7 ONCE/QUARTER

FECAL COLIFORM NOTE 1 1000 400 ONCE/QUARTER

TOTAL RESIDUAL CHLORINE mg/L 16.5 8.2 ONCE/QUARTER

CADMIUM, TOTAL RECOVERABLE lbs/day 0.0033 0.0013 ONCE/QUARTER

CADMIUM, TOTAL RECOVERABLE μg/L MONITOR MONITOR ONCE/QUARTER

COPPER, TOTAL RECOVERABLE μg/L MONITOR MONITOR ONCE/QUARTER

LEAD, TOTAL RECOVERABLE lbs/day 0.0046 0.0019 ONCE/QUARTER

LEAD, TOTAL RECOVERABLE μg/L MONITOR MONITOR ONCE/QUARTER

THALLIUM, TOTAL RECOVERABLE μg/L MONITOR MONITOR ONCE/QUARTER

ZINC, TOTAL RECOVERABLE lbs/day 0.0169 0.00578 ONCE/QUARTER

ZINC, TOTAL RECOVERABLE μg/L MONITOR MONITOR ONCE/QUARTER

HARDNESS, TOTAL mg/L MONITOR MONITOR ONCE/QUARTER

NOTE 1 – COLONIES/100 ML,

 
OUTFALL# 002

WET TEST (Y OR N): Y FREQUENCY: ONCE/YEAR A.E.C. 100% LIMIT: 10 CSR 20-7.031(3)(I)2. 

A.E.C. % = ( )

-1

X100

PARAMETER UNITS

MAXIMUM 

DAILY LIMIT

WEEKLY 

AVERAGE 

LIMIT

AVERAGE 

MONTHLY 

LIMIT

MONITORING 

FREQUENCY

FLOW MONITOR MONITOR DAILY

PH SU 6.5-9 6.5-9 ONCE/MONTH

TOTAL RESIDUAL CHLORINE μg/L 16.5 8.2 ONCE/MONTH

TEMPERATURE oC MONITOR MONITOR ONCE/MONTH

CADMIUM, TOTAL RECOVERABLE μg/L * * ONCE/MONTH

COPPER, TOTAL RECOVERABLE μg/L 11.8 5.9 ONCE/MONTH

LEAD, TOTAL RECOVERABLE μg/L * * ONCE/MONTH

SELENIUM, TOTAL RECOVERABLE μg/L 8.1 4.0 ONCE/MONTH

THALLIUM, TOTAL RECOVERABLE μg/L 10.3 5.1 ONCE/MONTH

ZINC, TOTAL RECOVERABLE μg/L * * ONCE/MONTH

Effluent limits for these parameters are set at 0.0 mg/L, results above the detection limits are to be considered effluent limit 

violations. Cd = 0.1 μg/L, Pb = 1.0 μg/L, and Zn = 5 μg/L. Cadmium and Lead are to be analyzed by Electrothermal 

Atomization Atomic Absorption, Standard Methods 3113B; Zinc by Flame Atomic Absorption Spectometry, Standard 

Methods 3111. 

 

Design Flow + Zone of Initial Dilution

Design Flow
OUTFALL# 003

WET TEST (Y OR N): Y FREQUENCY: ONCE/QUARTER A.E.C. 100% LIMIT: 10 CSR 20-7.031(3)(I)2. 

A.E.C. % = ( )

-1

X100

PARAMETER UNITS

MAXIMUM 

DAILY LIMIT

WEEKLY 

AVERAGE 

LIMIT

AVERAGE 

MONTHLY 

LIMIT

MONITORING 

FREQUENCY

FLOW MONITOR MONITOR DAILY

BIOCHEMICAL OXYGEN DEMAND (BOD5) mg/L MONITOR MONITOR ONCE/MONTH

TOTAL SUSPENDED SOLIDS lbs/day 36.056 24.036 ONCE/MONTH

TOTAL SUSPENDED SOLIDS mg/L 45 30 ONCE/MONTH

PH SU 7.5-9 7.5-9 ONCE/MONTH

CADMIUM, TOTAL RECOVERABLE lbs/day 0.001 ONCE/MONTH

CADMIUM, TOTAL RECOVERABLE μg/L 0.52 0.26 ONCE/MONTH

COPPER, TOTAL RECOVERABLE μg/L 11.8 5.9 ONCE/MONTH

LEAD, TOTAL RECOVERABLE lbs/day 0.012 ONCE/MONTH

LEAD, TOTAL RECOVERABLE μg/L 6.0 2.9 ONCE/MONTH

SELENIUM, TOTAL RECOVERABLE μg/L 8.1 4.0 ONCE/MONTH

THALLIUM, TOTAL RECOVERABLE μg/L 10.3 5.1 ONCE/MONTH

ZINC, TOTAL RECOVERABLE lbs/day 0.512 ONCE/MONTH

ZINC, TOTAL RECOVERABLE μg/L 218 109 ONCE/MONTH

OUTFALL# 005

WET TEST (Y OR N): N FREQUENCY: A.E.C. LIMIT: 

PARAMETER UNITS

MAXIMUM 

DAILY LIMIT

WEEKLY 

AVERAGE 

LIMIT

AVERAGE 

MONTHLY 

LIMIT

MONITORING 

FREQUENCY

PH SU MONITOR MONITOR ONCE/MONTH

HARDNESS, TOTAL mg/L MONITOR MONITOR ONCE/MONTH

CADMIUM, TOTAL RECOVERABLE μg/L MONITOR MONITOR ONCE/MONTH

COPPER, TOTAL RECOVERABLE μg/L MONITOR MONITOR ONCE/MONTH

LEAD, TOTAL RECOVERABLE μg/L MONITOR MONITOR ONCE/MONTH

SELENIUM, TOTAL RECOVERABLE μg/L MONITOR MONITOR ONCE/MONTH

THALLIUM, TOTAL RECOVERABLE μg/L MONITOR MONITOR ONCE/MONTH

ZINC, TOTAL RECOVERABLE μg/L MONITOR MONITOR ONCE/MONTH

 

Design Flow + Zone of Initial Dilution

Design Flow
OUTFALL# 006

WET TEST (Y OR N): Y FREQUENCY: ONCE/DISCHARGE A.E.C. 100% LIMIT: 10 CSR 20-7.031(3)(I)2. 

A.E.C. % = ( )

-1

X100

PARAMETER UNITS

MAXIMUM 

DAILY LIMIT

WEEKLY 

AVERAGE 

LIMIT

AVERAGE 

MONTHLY 

LIMIT

MONITORING 

FREQUENCY

FLOW MONITOR MONITOR ONCE/DISCHARGE/DAY

BIOCHEMICAL OXYGEN DEMAND (BOD5) mg/L MONITOR MONITOR ONCE/DISCHARGE/DAY

TOTAL SUSPENDED SOLIDS mg/L 45 30 ONCE/DISCHARGE/DAY

PH SU 7.5-9 7.5-9 ONCE/DISCHARGE/DAY

CADMIUM, TOTAL RECOVERABLE μg/L 0.52 0.26 ONCE/DISCHARGE/DAY

COPPER, TOTAL RECOVERABLE μg/L 6.8 3.4 ONCE/DISCHARGE/DAY

LEAD, TOTAL RECOVERABLE μg/L 6.0 2.9 ONCE/DISCHARGE/DAY

SELENIUM, TOTAL RECOVERABLE μg/L 8.1 4.0 ONCE/DISCHARGE/DAY

THALLIUM, TOTAL RECOVERABLE μg/L 10.3 5.1 ONCE/DISCHARGE/DAY

ZINC, TOTAL RECOVERABLE μg/L 218 109 ONCE/DISCHARGE/DAY

OUTFALL# 004 & S1 

WET TEST (Y OR N): N FREQUENCY: A.E.C. LIMIT: 

PARAMETER UNITS

MAXIMUM 

DAILY LIMIT

WEEKLY 

AVERAGE 

LIMIT

AVERAGE 

MONTHLY 

LIMIT

MONITORING 

FREQUENCY

PH SU MONITOR MONITOR ONCE/QUARTER

TEMPERATURE oC MONITOR MONITOR ONCE/MONTH

HARDNESS, TOTAL mg/L MONITOR MONITOR ONCE/QUARTER

CADMIUM, TOTAL RECOVERABLE μg/L MONITOR MONITOR ONCE/QUARTER

COPPER, TOTAL RECOVERABLE μg/L MONITOR MONITOR ONCE/QUARTER

LEAD, TOTAL RECOVERABLE μg/L MONITOR MONITOR ONCE/QUARTER

SELENIUM, TOTAL RECOVERABLE μg/L MONITOR MONITOR ONCE/QUARTER

THALLIUM, TOTAL RECOVERABLE μg/L MONITOR MONITOR ONCE/QUARTER

ZINC, TOTAL RECOVERABLE μg/L MONITOR MONITOR ONCE/QUARTER

Derivation and Discussion of Limits 

Wasteload allocations (WLA) were calculated using water quality criteria and the dilution equation below: 

)(

)*()*(

se

ss ee

QQ

QCQC C

+

+ = (EPA/505/2-90-001, Section 4.5.5) 

Where C = downstream concentration 

 

Design Flow + Zone of Initial Dilution

Design Flow
Cs = upstream concentration 

Qs = upstream flow (cfs) 

 Ce = effluent concentration 

Qe = effluent flow (cfs) 

Chronic wasteload allocations were determined using applicable chronic water quality criteria (CCC: criteria continuous 

concentration) and stream volume of flow at the edge of the mixing zone (MZ). Acute wasteload allocations were determined 

using applicable acute water quality criteria (CMC: criteria maximum concentration) and stream volume of flow. 

Water quality based maximum daily and average monthly effluent limitations were calculated using methods and procedures 

outlined in USEPA’s “Technical Support Document For Water Quality-based Toxics Control” (EPA/505/2-90-001). 

OUTFALL 001

WATER QUALITY AND TECHNOLOGY BASED EFFLUENT LIMITS

• Biochemical Oxygen Demand 10 CSR 20-7.015(8)(B)1.

• Total Suspended Solids 10 CSR 20-7.015(8)(B)1.

• Hardness, Total Monitoring to determine site specific hardness.

• pH. pH shall be maintained in the range from six to nine (6 – 9) standard units [10 CSR 20-7.015(8)(B)2.].

• Ammonia as Nitrogen. Total Ammonia Nitrogen – Early Life Stages Present criteria apply 10 CSR 20-7.031(4)(B)7.C. 

& Table B3. Background ammonia as nitrogen for receiving stream is assumed to be = 0.01mg/L. 

Season Temp (o

C) Total Ammonia Nitrogen 

CCC (mg/L) 

Total Ammonia Nitrogen 

CMC (mg/L) pH (SU) 

Summer 26 7.8 1.5 12.1 

Winter 6 7.8 3.1 12.1 

Summer: May 1 – October 31, Winter: November 1 – April 30 

Ce = ((Qe + Qs)C – (Qs * Cs))/Qe

Summer 

 Chronic 

 Ce = ((0.047 + 0.0)1.5 – (0.0 * 0.01))/ 0.047 

 Ce = 1.5 mg/L 

 WLAc = 1.5 mg/L 

 Acute 

 Ce = ((0.047 + 0.0)12.1 – (0.0 * 0.01))/ 0.047 

 Ce = 12.1 mg/L 

 WLAa = 12.1 mg/L 

LTAc = 1.5(0.780)= 1.2 mg/L [CV = 0.6, 99th Percentile, n=30] 

LTAa = 12.1 (0.321)= 3.9 mg/L [CV = 0.6, 99th Percentile] 

Use most protective number of LTAc or LTAa. 

MDL = 1.2(3.11)= 3.7 mg/L [CV = 0.6, 99th Percentile] 

 

AML = 1.2(1.55)= 1.9 mg/L [CV = 0.6, 95th Percentile, n = 4] 
Winter

Chronic 

 Ce = ((0.047 + 0.0)3.1 – (0.0 * 0.01))/ 0.047 

 Ce = 3.1 mg/L 

 WLAc = 3.1 mg/L 

Acute 

 Ce = ((0.047 + 0.0)12.1 – (0.0 * 0.01))/ 0.047 

 Ce = 12.2 mg/L 

 WLAa = 12.2 mg/L 

LTAc = 3.1(0.780)= 2.4 mg/L [CV = 0.6, 99th Percentile, n=30] 

LTAa = 12.2(0.321)= 3.9 mg/L [CV = 0.6, 99th Percentile] 

Use most protective number of LTAc or LTAa.

MDL = 2.4(3.11)= 7.5 mg/L [CV = 0.6, 99th Percentile] 

AML = 2.4(1.55)= 3.7 mg/L [CV = 0.6, 95th Percentile, n = 4] 

• Fecal Coliform Discharge shall not contain more than a monthly geometric mean of 400 colonies/ 100 mL and a daily 

maximum of 1000 colonies/100 mL during the recreational season (April 1 – October 31) [10 CSR 20-7.015(8)(B)4.A.] 

Future renewals of the facility operating permit will contain effluent limitations for E. coli which will replace fecal 

coliform as the applicable bacteria criteria in Missouri’s water quality standards.

• Total Residual Chlorine. Warm water acute criteria = 19 μg/L, warm water chronic criteria = 10 μg/L [10 CSR 20-7.031, 

Table A]. Background = 0.0 mg/L.

Chronic 

 Ce = ((0.047 + 0.0)10 – (0.0 * 0.0))/0.047 

 Ce = 10 μg/L 

WLAc = 10 μg/L 

Acute 

 Ce = ((0.047 + 0.0)19 – (0.0 * 0.0))/0.047 

 Ce = 19 μg/L 

WLAa = 19 μg/L 

LTAc = 10(0.527)= 5.3 μg/L [CV = 0.6, 99th Percentile] 

LTAa = 19(0.321)= 6.1 μg/L [CV = 0.6, 99th Percentile] 

Use most protective number of LTAc or LTAa. 

MDL = 5.3(3.11)= 16.5 μg/L [CV = 0.6, 99th Percentile] 

AML = 5.3(1.55)= 8.2 μg/L [CV = 0.6, 95th Percentile, n = 4] 

• Copper, Total Recoverable Effluent limits for this parameter moved to Outfall 003, because treatment for this parameter 

occurs at that outfall.

• Thallium, Total Recoverable Effluent limits for this parameter moved to Outfall 003, because treatment for this 

parameter occurs at that outfall.

 
Categorical effluent limits: 

PRIMARY LEAD SUBCATEGORY

(j) Employee hand wash given in (lbs/109 lbs of lead bullion produced) 

Pollutant Daily Max. Monthly Avg.

Lead (BAT) 0.924 0.429 

Zinc (BAT) 3.366 1.386 

TSS (BPT)* 135.300 64.350 

Cadmium (DD)(BAT) 0.660 0.264 

* An allowance was given for TSS in both BPT and in NSPS, but not in the BAT. BCT is to address this issue, however it 

has not yet been developed, so the BPT allowance is being used. 

(k) Respirator wash given in (lbs/109

 lbs of lead bullion produced) 

Pollutant Daily Max. Monthly Avg.

Lead (BAT) 1.484 0.689 

Zinc (BAT) 5.406 2.226 

TSS (BPT)* 217.300 103.400 

Cadmium (DD)(BAT) 1.060 0.424 

pH within the range of 7.5 to 10.0 at all times. 

CATEGORICAL EFFLUENT MASS LIMITATION CALCULATIONS

The effluent mass limitations for cadmium, lead, zinc, and TSS from the process wastewater contribution to Outfall #001, are 

calculated using the foregoing effluent limits (scope flows). The daily production rate of 0.000713 billion pounds of primary 

lead bullion given in the application for permit renewal was used as the multiplier. To those mass limits there are added nonscope effluent mass limit allotments. 

For Outfall #001, the effect of the flow from employee rest rooms for 185 employees, and showers for 125 employees (OSHA 

requirement) has been added. Using {10 CSR 20 - 8.020(11)(B)3} design figures of 10 gallons/person/day for employee 

showers and 15 gallons/person/day for employee rest room usage. For Outfall #003, the effect of the stormwater flow has been 

added. 

First, using the flow of 15 gal/person/day for 185 employees we back calculate from an allowance of 45 mg/L (daily 

maximum) for domestic waste from the restrooms. Then we back calculate from an allowance of 30 mg/L (monthly average) 

for domestic waste. 

TSS daily maximum Outfall #001 

(2820 gal/day)(45 mg/L)(3.785 1/gal)(2.205x10-6 lbs/mg) = 1.0591 lbs/day 

TSS monthly average Outfall #001 

(2820 gal/day)(30mg/L)(3.785 1/gal)(2.205x10-6 lbs/mg) = 0.7061 lbs/day 

 

There is also a non-scope effluent mass limit allotment for cadmium, lead, zinc and TSS given for shower water. The flow 

from the employee showers at 10 gallons/person/day for 125 employees is used in the calculation. Here the allowed 

concentration values are obtained from Table VII-21, on page 248 of Volume I, of the EPA Final Development Document for 

Effluent Limitations Guidelines and Standards for the Nonferrous Metals Manufacturing Point Source Category, (non-scope 

flows) for monthly average and daily maximum for each of the contaminants. 
Lead daily maximum Outfall #001 

(1250 gal/day)(0.28 mg/L)(3.785 1/gal)(2.205x10-6 lbs/mg) = 0.0029 lbs/day 

Lead monthly average Outfall #001 

(1250 gal/day)(0.11 mg/L)(3.785 1/gal)(2.205x10-6 lbs/mg) = 0.0011 lbs/day 

Zinc daily maximum Outfall #001 

(1250 gal/day)(1.02 mg/L)(3.785 1/gal)(2.205x10-6 lbs/mg) = 0.0106 lbs/day 

Zinc monthly average Outfall #001 

(1250 gal/day)(0.31 mg/L)(3.785 1/gal)(2.205x10-6 lbs/mg) = 0.0032 lbs/day 

Cadmium daily maximum Outfall #001 

(1250 gal/day)(0.20 mg/L)(3.785 1/gal)(2.205x10-6 lbs/mg) = 0.0021 lbs/day 

Cadmium monthly average Outfall #001 

(1250 gal/day)(0.08 mg/L)(3.785 1/gal)(2.205x10-6 lbs/mg) = 0.0008 lbs/day 

TSS daily maximum Outfall #001 

(1250 gal/day)(15 mg/L)(3.785 1/gal)(2.205x10-6 lbs/mg) = 0.1565 lbs/day 

TSS monthly average Outfall #001 

(1250 gal/day)(10 mg/L)(3.785 1/gal)(2.205x10-6 lbs/mg) = 0.104324 lbs/day 

DAILY MAXIMUM

LEAD (CATEGORICAL ALLOWANCES) Outfall #001 

employee hand wash (0.000713 x 109#) x (0.924 #/109#) = 0.00066 # 

respirator wash (0.000713 x 109

#) x (1.484 #/109#) = 0.00106 # 

employee showers (from above) = 0.0029 # 

TOTAL = 0.00462 # 

MONTHLY AVERAGE

LEAD (CATEGORICAL ALLOWANCES) Outfall #001 

employee hand wash (0.000713 x 109

#) x (0.429 #/109#) = 0.00031 # 

respirator wash (0.000713 x 109

#) x (0.689 #/109#) = 0.00049 # 

employee showers (from above) = 0.0011 # 

TOTAL = 0.0019 # 

DAILY MAXIMUM

ZINC (CATEGORICAL ALLOWANCES) Outfall #001 

employee hand wash (0.000713 x 109#) x (3.366 #/109#) = 0.0024 # 

respirator wash (0.000713 x 109

#) x (5.406 #/109#) = 0.0039 # 

 

employee showers (from above) = 0.0106 # 
TOTAL = 0.0169 # 

MONTHLY AVERAGE

ZINC (CATEGORICAL ALLOWANCES) Outfall #001 

employee hand wash (0.000713 x 109#) x (1.386 #/109#) = 0.00099 # 

respirator wash (0.000713 x 109

#) x (2.226 #/109#) = 0.00159 # 

employee showers (from above) = 0.0032 # 

TOTAL = 0.00578 # 

DAILY MAXIMUM

CADMIUM (CATEGORICAL ALLOWANCES) Outfall #001 

employee hand wash (DD) (0.000713 x 109

#) x (0.660 #/109#) = 0.00047 # 

respirator wash (DD) (0.000713 x 109#) x (1.060 #/109#) = 0.00076 # 

employee showers (from above) = 0.0021 # 

TOTAL = 0.00333 # 

MONTHLY AVERAGE

CADMIUM (CATEGORICAL ALLOWANCES) Outfall #001 

employee hand wash (DD) (0.000713 x 109

#) x (0.264 #/109#) = 0.000188 # 

respirator wash (DD) (0.000713 x 109#) x (0.424 #/109#) = 0.000302 # 

employee showers (from above) = 0.0008 # 

TOTAL = 0.00129 # 

DAILY MAXIMUM

TSS (CATEGORICAL ALLOWANCES) Outfall #001 

employee hand wash (0.000713 x 109#) x (135.300 #/109#) = 0.096 # 

respirator wash (BPT) (0.000713 x 109#) x (217.300 #/109#) = 0.155 # 

employee rest room (from above) = 1.059 # 

employee showers (from above) = 0.1565 # 

TOTAL = 1.4665 # 

MONTHLY AVERAGE

TSS (CATEGORICAL ALLOWANCES) Outfall #001 

employee hand wash (0.000713 x 109#) x (64.350 #/109#) = 0.046 # 

respirator wash (BPT) (0.000713 x 109

#) x (103.400 #/109#) = 0.074 # 

employee rest room (from above) = 0.7061 # 

employee showers (from above) = 0.1043 # 

TOTAL = 0.9304 # 

The pH must be maintained within the range of 7.5 to 10.0 at all times. 

 

Because mass based categorical limits exist for Total Suspended Solids, both the categorical mass based 

limit and the regulatory technology based concentration limit will appear in the permit. In order to meet 
the mass based limit the facility must achieve less than the concentration based limit at design flows. 

Higher volume of discharges must achieve a lower concentration of suspended solids. 

OUTFALL 002

Non-contact cooling water is not subject to categorical limits, therefore water quality based effluent limits will be applied. 

• pH. pH shall be maintained in the range from six to nine (6.5 – 9) standard units [10 CSR 20-7.031(4)(E)]. 

• Total Residual Chlorine. Acute criteria = 19 μg/L, chronic criteria = 10 μg/L [10 CSR 20-7.031, Table A]. Background = 

0.0 mg/L.

Chronic 

 Ce = ((0.5 + 0.0)10 – (0.0 * 0.0))/0.5 

 Ce = 10 μg/L 

WLAc = 10 μg/L 

Acute 

 Ce = ((0.5 + 0.0)19 – (0.0 * 0.0))/0.5 

 Ce = 19 μg/L 

WLAa = 19 μg/L 

LTAc = 10(0.527)= 5.3 μg/L [CV = 0.6, 99th Percentile] 

LTAa = 19(0.321)= 6.0 μg/L [CV = 0.6, 99th Percentile] 

Use most protective number of LTAc or LTAa. = 0.005 mg/L 

MDL = 5.3(3.11)= 16.5 μg/L [CV = 0.6, 99th Percentile] 

AML = 5.3(1.55)= 8.2 μg/L [CV = 0.6, 95th Percentile, n = 4] 

• Temperature Since Big Creek is designated as “cool-water fishery” the stream temperature should not exceed 84 degrees 

F, or be raised more than 5 degrees F above ambient temperature. The temperature of the effluent from Outfall #002 and 

Big Creek immediately above the mouth of Scroggins Branch shall be monitored. The temperature at the water-quality 

compliance point Outfall #004 shall not be more than 5 degrees F above the temperature immediately above Scroggins 

Branch, and shall not exceed 84 degrees F. 

Metals

Effluent limits for Cadmium, Lead and Zinc from outfall 002 are set at zero because the entire Wasteload Allocation for these 

three metals are attributed to outfall 003. To enforce these limits, compliance will be determined by detection of the 

parameters. 

Effluent limitations for the remaining total recoverable metals were developed using methods and procedures outlined in 

EPA/505/2-90-001 and “The Metals Translator: Guidance For Calculating A Total Recoverable Permit Limit From A 

Dissolved Criterion” (EPA 823-B-96-007). General warm-water fishery criteria apply and water hardness = 74.3 mg/L. 

Due to the absence of contemporaneous effluent and instream data for total recoverable metals, dissolved metals, hardness, and 

total suspended solids with which to calculate metals translators, partitioning between the dissolved and absorbed phases was 

assumed to be minimal (Section 5.7.3, EPA/505/2-90-001). Freshwater criteria conversion factors for dissolved metals were 

used as the metals translator as recommended in guidance (Section 1.3, 1.5.3, and Table 1, EPA 823-B-96-007). If concurrent 

site-specific data for total recoverable metals, dissolved metals, hardness, and total suspended solids are provided to the 

department, partitioning evaluations may be considered and site-specific translators developed. 

 
CONVERSION FACTORS METAL

ACUTE CHRONIC

Copper 0.960 0.960 

• Thallium, Total Recoverable Human Health Protection [Fish Consumption] Chronic Criteria = 6.3 μg/L. 

Chronic 

 Ce = ((0.45 + 0.0)6.3 – (0.0 * 0.0))/0.45 

 Ce = 6.3 μg/L 

 WLAc = 6.3 μg/L 

LTAc = 6.3(0.527)= 3.3 μg/L [CV = 0.6, 99th Percentile] 

MDL = 3.3(3.11)= 10.3 μg/L [CV = 0.6, 99th Percentile] 

AML = 3.3(1.55)= 5.1 μg/L [CV = 0.6, 95th Percentile, n = 4] 

• Copper, Total Recoverable Protection of Aquatic Life Chronic Criteria = 7 μg/L, Acute Criteria = 13 μg/L.

Chronic = 7.0/0.960 = 7.3 μg/L 

Acute = 13.0/0.960 = 13.5 μg/L

Chronic 

 Ce = ((0.45 + 0.0)7.3 – (0.0 * 0.0))/0.45 

 Ce = 7.3 μg/L 

 WLAc = 7.3 μg/L 

Acute 

 Ce = ((0.45 + 0.0)13.5 – (0.0 * 0.0))/0.45 

 Ce = 13.5 μg/L 

 WLAa = 13.5 μg/L 

LTAc = 7.3(0.527)=3.8 μg/L [CV = 0.6, 99th Percentile] 

LTAa = 13.5(0.321)=4.3 μg/L [CV = 0.6, 99th Percentile] 

Use most protective number of LTAc or LTAa. 

MDL = 2.2(3.11)=11.8 μg/L [CV = 0.6, 99th Percentile] 

AML = 2.2(1.55)=5.9 μg/L [CV = 0.6, 95th Percentile, n = 4] 

• Selenium, Total Recoverable Protection of Aquatic Life Chronic Criteria = 5.0 μg/L.

Chronic 

 Ce = ((0.45 + 0.0)5.0 – (0.0 * 0.0))/0.45 

 Ce = 5.0 μg/L 

 WLAc = 5.0 μg/L 

LTAc = 5.0(0.527)=2.6 μg/L [CV = 0.6, 99th Percentile] 

 

MDL = 2.6(3.11)=8.1 μg/L [CV = 0.6, 99th Percentile] 

 

AML = 2.6(1.55)=4.0 μg/L [CV = 0.6, 95th Percentile, n = 4]
OUTFALL 003

Water Quality and Technology Based Effluent Limits:

• Total Suspended Solids 10 CSR 20-7.015(8)(B)1. Discharge of the domestic wastewater from outfall 001 is not allowed 

to be reduced in quality by the treatment process at outfall 003.

• Biochemical Oxygen Demand monitoring to determine if this facility poses a threat to instream water quality.

• pH. pH shall be maintained in the range from six to nine (6.5 – 9) standard units [10 CSR 20-7.031(4)(E)].

Metals

Effluent limitations for total recoverable metals were developed using methods and procedures outlined in EPA/505/2-90-001 

and “The Metals Translator: Guidance For Calculating A Total Recoverable Permit Limit From A Dissolved Criterion” (EPA 

823-B-96-007). General warm-water fishery criteria apply and water hardness = 74.3 mg/L. 

Due to the absence of contemporaneous effluent and instream data for total recoverable metals, dissolved metals, hardness, and 

total suspended solids with which to calculate metals translators, partitioning between the dissolved and absorbed phases was 

assumed to be minimal (Section 5.7.3, EPA/505/2-90-001). Freshwater criteria conversion factors for dissolved metals were 

used as the metals translator as recommended in guidance (Section 1.3, 1.5.3, and Table 1, EPA 823-B-96-007). If concurrent 

site-specific data for total recoverable metals, dissolved metals, hardness, and total suspended solids are provided to the 

department, partitioning evaluations may be considered and site-specific translators developed. 

CONVERSION FACTORS METAL

ACUTE CHRONIC

Cadmium 0.956 0.921 

Copper 0.960 0.960 

Lead 0.834 0.834 

Zinc 0.978 0.986 

*

Conversion factors for Cd and Pb are hardness dependent. Values 

calculated using equation found in Section 1.3 of EPA 823-B-96-007 and 

hardness = 74.3 mg/L. 

TMDL Wasteload Allocations: 

Daily Maximum, Dissolved Cadmium 0.001 lbs/day 

Daily Maximum, Dissolved Lead 0.012 lbs/day 

Daily Maximum, Dissolved Zinc 0.512 lbs/day 

TMDL EFFLUENT LIMITS

Daily Maximum, Dissolved Cadmium 0.5 μg/L 

Daily Maximum, Dissolved Lead 5 μg/L 

Daily Maximum, Dissolved Zinc 213 μg/L 

 

Effluent limits from the TMDL were developed to prevent exceedance of Water Quality Standards in Big Creek and are not to 

be exceeded. The Maximum Daily Limit is therefore set at the TMDL effluent limit. The limits are the dissolved fraction, and

must be converted to total recoverable for effluent limits. The Average Monthly Limit is calculated by determining the Long 

Term Average and then the Limit using default multipliers found in the Technical Support Document. For this conversion the 

TMDL limit is used as an acute wasteload allocation.
• Total Recoverable Cadmium

WLA = 0.5/0.956 = 0.52 μg/L 

LTAa = 0.52(0.321)=0.17 μg/L [CV = 0.6, 99th Percentile] 

MDL = 0.52 μg/L 

AML = 0.17(1.55)=0.26 μg/L [CV = 0.6, 95th Percentile, n = 4]

• Total Recoverable Lead

WLA = 5.0/0.834 = 6.0 μg/L 

LTAa = 6.0(0.321)=1.9 μg/L [CV = 0.6, 99th Percentile] 

MDL = 6.0 μg/L 

AML = 1.9(1.55)=2.9 μg/L [CV = 0.6, 95th Percentile, n = 4] 

• Total Recoverable Zinc

WLA = 213/0.978 = 218 μg/L 

LTAa = 218(0.321)=70 μg/L [CV = 0.6, 99th Percentile] 

MDL = 218 μg/L 

AML = 70(1.55)=109 μg/L [CV = 0.6, 95th Percentile, n = 4] 

• Thallium, Total Recoverable Human Health Protection [Fish Consumption] Chronic Criteria = 6.3 μg/L 

Chronic 

 Ce = ((0.45 + 0.0)6.3 – (0.0 * 0.0))/0.45 

 Ce = 6.3 μg/L 

 WLAc = 6.3 μg/L 

LTAc = 6.3(0.527)= 3.3 μg/L [CV = 0.6, 99th Percentile] 

MDL = 3.3(3.11)= 10.3 μg/L [CV = 0.6, 99th Percentile] 

AML = 3.3(1.55)= 5.1 μg/L [CV = 0.6, 95th Percentile, n = 4] 

• Copper, Total Recoverable Protection of Aquatic Life Chronic Criteria = 7 μg/L, Acute Criteria = 13 μg/L.

Chronic = 7.0/0.960 = 7.3 μg/L 

Acute = 13.0/0.960 = 13.5 μg/L

Chronic 

 Ce = ((0.45 + 0.0)7.3 – (0.0 * 0.0))/0.45 

 Ce = 7.3 μg/L 

 WLAc = 7.3 μg/L 

 

Acute 
 Ce = ((0.45 + 0.0)13.5 – (0.0 * 0.0))/0.45 

 Ce = 13.5 μg/L 

 WLAa = 13.5 μg/L 

LTAc = 7.3(0.527)=3.8 μg/L [CV = 0.6, 99th Percentile] 

LTAa = 13.5(0.321)=4.3 μg/L [CV = 0.6, 99th Percentile] 

Use most protective number of LTAc or LTAa. 

MDL = 2.2(3.11)=11.8 μg/L [CV = 0.6, 99th Percentile] 

AML = 2.2(1.55)=5.9 μg/L [CV = 0.6, 95th Percentile, n = 4] 

• Selenium, Total Recoverable Protection of Aquatic Life Chronic Criteria = 5.0 μg/L.

Chronic 

 Ce = ((0.45 + 0.0)5.0 – (0.0 * 0.0))/0.45 

 Ce = 5.0 μg/L 

 WLAc = 5.0 μg/L 

LTAc = 5.0(0.527)=2.6 μg/L [CV = 0.6, 99th Percentile] 

 

MDL = 2.6(3.11)=8.1 μg/L [CV = 0.6, 99th Percentile] 

AML = 2.6(1.55)=4.0 μg/L [CV = 0.6, 95th Percentile, n = 4]

Categorical Limits: 

The effluent mass limitations for cadmium, lead, zinc and TSS from the process stormwater*, are calculated using the 

contaminant values found in Table VII-21. The flow rate used for stormwater runoff was 2.4 million gallons per day. This is 

based on the treatment plant design flow rate of 200 gallons per minute (0.288 MGD), rather than any specific storm event. 

Lead daily maximum Outfall #003 

(0.288x106

 gal/day)(0.28 mg/L)(3.785 1/gal)(2.205x10-6 lbs/mg) = 0.673 lbs/day 

Lead monthly average Outfall #003 

(0.288x106 gal/day)(0.11 mg/L)(3.785 1/gal)(2.205x10-6 lbs/mg) = 0.264 lbs/day 

Zinc daily maximum Outfall #003 

(0.288x106

 gal/day)(1.02 mg/L)(3.785 1/gal)(2.205x10-6 lbs/mg) = 2.452 lbs/day 

Zinc monthly average Outfall #003 

(0.288x106

 gal/day)(0.31 mg/L)(3.785 1/gal)(2.205x10-6 lbs/mg) = 0.745 lbs/day 

Cadmium daily maximum Outfall #003 

(0.288x106

 gal/day)(0.20 mg/L)(3.785 1/gal)(2.205x10-6 lbs/mg) = 0.481 lbs/day 

Cadmium monthly average Outfall #003 

(0.288x106

 gal/day)(0.08 mg/L)(3.785 1/gal)(2.205x10-6 lbs/mg) = 0.192 lbs/day 

TSS daily maximum Outfall #003 

(0.288x106 gal/day)(15.0 mg/L)(3.785 1/gal)(2.205x10-6 lbs/mg) = 36.054 lbs/day 

TSS monthly average Outfall #003 

 

(0.288x106

 gal/day)(10.0 mg/L)(3.785 1/gal)(2.205x10-6 lbs/mg) = 24.036 lbs/day 
* The process stormwater defined here does not include the stormwater isolated and collected in the area of the plant regulated

under the Missouri Hazardous Waste Law. 

Parameter Categorical Limits lbs/day TMDL Limits lbs/day 

Cadmium 0.481 0.001 

Lead 0.673 0.012 

Zinc 2.452 0.512 

Because the TMDL limits for Cadmium, Lead and Zinc are more protective than the categorical limits, the TMDL limits will 

be used. 

10 CSR 20-7.031(4)(E) and 10 CSR 20-7.015(9)(G)1. require that discharges from this facility not exceed 9 pH standard units. 

Categorical limits require discharges not below 7.5 standard units. Therefore the pH limits are set at 7.5-9 standard units. 

Because mass based categorical limits exist for Total Suspended Solids, both the categorical mass based limit and the 

regulatory technology based concentration limit will appear in the permit. In order to meet the mass based limit the facility 

must achieve less than the concentration based limit at design flows. Higher volume of discharges must achieve a lower 

concentration of suspended solids. 

Outfall 005

• Hardness, Cadmium, Copper, Lead, Selenium, Thallium and Zinc Monitoring for these parameters to determine 

contributions from this facility in to the receiving stream. 

Outfall 006

Outfall 006 is an emergency discharge from the holding basin at the process wastewater treatment facility. Discharges are to 

be very short in nature related to excessive precipitation. All of the concentration based limits from outfall 003 apply. Mass 

based limits are not applied due to the rarity of discharges from this outfall. 

Outfall 004 & S1 Outfall 004 is downstream monitoring. S1 formerly named “Upstream Monitoring Point”. 

• Temperature, Hardness, Cadmium, Copper, Lead, Selenium, Thallium and Zinc Instream monitoring to evaluate 

compliance with temperature standards and to evaluate recovery of the receiving stream. 

Reviewer: Curt Gateley 

Date: 6-1-06 

Unit Chief: Refaat Mefrakis 

 

Monitoring and effluent limits contained within this document have been developed in accordance 

with EPA guidelines using the best available data and are believed to be consistent with 

Missouri's Water Quality Standards and Effluent Regulations. If additional water quality data or 

are available that may affect the recommended monitoring and effluent limits, please forward these 

data and information to the author.