## 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, 92 nd 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 requi rements
as set forth herein:



### FACILITY DESCRIPTION

See page 2

This permit authorizes only wastewater di scharges 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 wa sh, and respirator wash (categorical flows), an d 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 wate r is captured in a holding basin and then treated in a wastewater plant with a desi gn 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: Sc oggins 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: Sc oggins Branch (U) First Classified Stream and ID: Big Creek (P)(02916) USGS Basin & Sub-watershed No.: (08020202-040001)

Downstream Monitoring Point – DeletedPAGE NUMBER 3 of 12

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

The permittee is authorized to discharge from outfall(s) with se rial 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 p ermit. 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 VISI BLE 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

T otal 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

M ONITORING 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 VISI BLE 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 se rial 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 expirati on of the permit. Such discharges shall be controlled, limited and monitored by the permittee as specified below:

FINAL EFFLUENT LIMITATIONS MONITORING RE Q UIREMENTS 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

μ g/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 VISI BLE 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

μ g/L

lbs/day

μ g/L

lbs/day

μ g/L

μ g/L

μ g/L

μ g/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

M ONITORING 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 VISI BLE 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 se rial number(s) as specified in the application for this permit. The final effluent

limitations shall become effective upon issuance and remain in effect until expira tion 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 Demand 5

pH - Units

Copper, Total Recoverable

Thallium, Total Recoverable

Hardness

Ammonia as Nitrogen (May 1-Oct 31) (Nov 1-April 30) MGD

μ g/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 VISI BLE 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 se rial number(s) as specified in the application for this permit. The final effluent

limitations shall become effective upon issuance and remain in effect until expira tion 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

O utfall #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 VISI BLE FOAM IN OTHER THAN TRACE AMOUNTS.

O utfall 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 VISI BLE 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 se rial number(s) as specified in the application for this permit. The final effluent limitations shall become effective upon issuance and rema in 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

O utfall #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

μ g/L

lbs/day

μ g/L

lbs/day

μ g/L

μ g/L

μ g/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 VISI BLE FOAM IN OTHER THAN TRACE AMOUNTS.

B. STANDARD CONDITIONS

IN ADDITION TO SPECIFIED CONDITIONS STATED HEREIN , THIS PERMIT IS SUBJ ECT 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 fro m 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 depr ess the temperature of the recei ving stream beyond the mixing zone more than five (5° )F. The stream temperature beyond the mixing zone sha ll 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 Temperat ure 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 μ g/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 t hese parameters are: Cadmium = 0.1 μ g/L, Lead = 1.0 μ g/L, and Zinc = 5 μ g/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 th e effluent standard or limitation so issued or approved: (1) contains different conditions or is otherwise more st ringent 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 so on as it knows or has reason to believe: (a) That any activity has occurred or will occur which would re sult in the discharge of any toxic pollutant which is not limited in the permit, if that di scharge will exceed the highest of th e 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, monito ring, 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 efflue nt from Outfall #001 and instead pumps th at effluent to the stormwater basin for further treatment to remove metals, the permittee must test for Biochemical Oxygen Demand 5 and Fecal Coliform prior to commingling this effluent with the stormwater. The limits for Biochemical Oxygen Demand 5 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 h azard from incidental c ontact 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, applia nces, demolition debris, used vehicles or equipment and solid waste as defined in Missouri's Solid Waste Law, s ection 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 31 st of each year starting in 1999, Doe Run shall submit a report to the So utheast Regional office, the Water Pollution Control Program (WPCP) - Central Office, and United States Environmental Protectio n 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 31 st 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, includin g 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 te st, do not repeat the test until the next test period. (a) For discharges of stormwater, samples shall be coll ected 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 collec tion. In no event shall sample collection occur simultaneously with the occurrence of precip itation excepting for stormwater samples. (d) A twenty-four hour composite sample shall be subm itted 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 fl ow is clearly evident. (f) Samples submitted for analysis of upstream receiving wa ter may be collected as e ither a grab or twentyfour-hour composite as appropriate to the natu re of the discharge. (g) Chemical and physical analysis of the upstream control and effluent sample shall occur immediately upon being received by the labo ratory, prior to any mani pulation of the effluent sample beyond preservation methods consistent with federal guidelines for WET te sting that are required to stabilize the sample during shipping. (h) Any and all chemical or physical analysis of the e ffluent 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 natu re of the discharge. (m) All instream samples, including downstream samples, sh all 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 th e 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 PA SS. 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-dilutio n tests during any period of accelerat ed 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 evalua tion (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 approp riate. 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 modi fied 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, add itional TIEs will not be required as long as effluent characteristics remain essentially uncha nged 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 th e upstream receiving-water control sample. Where upstream receiving water is not available mortality obs erved 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 EFFLUENT S 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 LC 50 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 th an 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 recei ving-water control sample. Where upstream receiving water is not available mortality obs erved 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 sh all 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 animal s 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 th e "Acceptable Effluent Concentra tion" (AEC) specified above. (4) When dilutions are required , upstream receiving stream water shall be us ed 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 wa ter 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 sp ecies exceeds 10%, the entir e 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 multip le dilution methods. Any future changes in methodology will be supplied to the permittee by the Missouri Department of Natural Resources (MDNR). Unless more stringent me thods are specified by the DN R, 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 r eceiving 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 controlsDate 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 proc ess.

The Federal Water Pollution Control Act ("Clean Water Act" Secti on 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 a re unlawful without a permit (Section 301 of the "Clean Water Act"). After a permit is obtained, a discharge not in compliance wit h 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 stat e 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 DESCRIPT ION AND RATIONALE

The facility includes a smelter [not currently in operation], em ployee generated domestic wastewater, non-contact cooling water , and stormwater from the smelter grounds and slag piles. Wastewater flows to a holding ba sin, and is then run through a treatment f acility

to remove metals. The wastewater treatment f acility 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 Depart ment 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 a re livestock and wildlife watering, cool water fishery, whole body contact recreation, secondary contact recreation, and protection of aquatic life.

To protect these benefici al uses and the water quality of th e receiving stream, effluent limita tions have been established unde r federal and state laws. Please see the Water Quality Review Sheet Po rtion 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

F ACILITY N AME : Glover Smelter NPDES #: MO-0001121

F ACILITY T YPE /D ESCRIPTION : Primary lead smelter and refining facility

EDU: 8-D IGIT HUC: 08020202 Ozark / Upper St. Francis / Castor Drainages C OUNTY : Iron

EDU = Ecological Drainage Unit

L EGAL D ESCRIPTION : NW 1⁄4, Sec. 11, T32N, R3E L ATITUDE /L ONGITUDE : +3728537/-09041312

W ATER Q UALITY H ISTORY : Occasional exceedence of effluent limits.



## Outfall Characteristics

O UTFALL D ESIGN F LOW ( CFS ) T REATMENT T YPE R ECEIVING W ATERBODY

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

W ATERBODY C LASS WBID 1Q10 ( CFS ) 7Q10 ( CFS ) 30Q10 ( CFS ) *D ESIGNATED U SES

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 (I ND), Secondary Contact Recreation(SCR), Dri nking Water Supply (DWS), Whole Body Contact Recreation (WBC), Protection of Warmwater Aquatic Life and Human Health (AQL), Livestock & Wildlife Watering (LWW)

C OMMENTS : 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 SectionMIXING 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 W ATERSHED : (Y OR N) Y W.L.A. S TUDY C ONDUCTED : (Y OR N) Y D ISINFECTION R EQUIRED : U SE A TTAINABILITY
A NALYSIS (Y,N) Y (Y OR N) N

OUTFALL# 001

W ET T EST (Y OR N): N F REQUENCY : A.E.C. L IMIT :

PARAMETER U NITS M AXIMUM
D AILY L IMIT W EEKLY
A VERAGE

L IMIT A VERAGE
M ONTHLY

L IMIT M ONITORING
F REQUENCY

F LOW MONITOR MONITOR DAILY

B IOCHEMICAL O XYGEN D EMAND (BOD 5 ) mg/L 45 30 ONCE / QUARTER

T OTAL S USPENDED S OLIDS mg/L 45 30 ONCE / QUARTER

T OTAL S USPENDED S OLIDS lbs/day 1.467 0.930 ONCE / QUARTER

P H SU 7.5-9 7.5-9 ONCE / QUARTER

A MMONIA AS N mg/L 3.7 1.9 ONCE / QUARTER

A MMONIA AS N mg/L 7.5 3.7 ONCE / QUARTER

F ECAL C OLIFORM N OTE 1 1000 400 ONCE / QUARTER

T OTAL R ESIDUAL C HLORINE mg/L 16.5 8.2 ONCE / QUARTER
C ADMIUM

, T OTAL R ECOVERABLE lbs/day 0.0033 0.0013 ONCE / QUARTER

C ADMIUM

, T OTAL R ECOVERABLE μ g/L MONITOR MONITOR ONCE / QUARTER

C OPPER

, T OTAL R ECOVERABLE μ g/L MONITOR MONITOR ONCE / QUARTER

L EAD

, T OTAL R ECOVERABLE lbs/day 0.0046 0.0019 ONCE / QUARTER

L EAD

, T OTAL R ECOVERABLE μ g/L MONITOR MONITOR ONCE / QUARTER

T HALLIUM

, T OTAL R ECOVERABLE μ g/L MONITOR MONITOR ONCE / QUARTER

Z INC

, T OTAL R ECOVERABLE lbs/day 0.0169 0.00578 ONCE / QUARTER

Z INC

, T OTAL R ECOVERABLE μ g/L MONITOR MONITOR ONCE / QUARTER

H ARDNESS

, T OTAL ONCE / QUARTER mg/L MONITOR MONITOR

N OTE 1

– C OLONIES /100 M L,OUTFALL# 002

W ET T EST (Y OR N): Y F REQUENCY : ONCE / YEAR A.E.C. 100% L IMIT : 10 CSR 20-7.031(3)(I)2.

A.E.C. % = 

# ( ) -1 X100

PARAMETER U NITS M AXIMUM
D AILY L IMIT W EEKLY
A VERAGE

L IMIT A VERAGE
M ONTHLY

L IMIT M ONITORING
F REQUENCY

F LOW MONITOR MONITOR DAILY

P H SU 6.5-9 6.5-9 ONCE / MONTH

T OTAL R ESIDUAL C HLORINE μ g/L 16.5 8.2 ONCE / MONTH

T EMPERATURE o C MONITOR MONITOR ONCE / MONTH

C ADMIUM

, T OTAL R ECOVERABLE μ g/L * * ONCE / MONTH

C OPPER

, T OTAL R ECOVERABLE μ g/L 11.8 5.9 ONCE / MONTH

L EAD

, T OTAL R ECOVERABLE μ g/L * * ONCE / MONTH

S ELENIUM

, T OTAL R ECOVERABLE μ g/L 8.1 4.0 ONCE / MONTH

T HALLIUM

, T OTAL R ECOVERABLE μ g/L 10.3 5.1 ONCE / MONTH

Z INC

, T OTAL R ECOVERABLE μ g/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 limi t

violations. Cd = 0.1 μ g/L, Pb = 1.0 μ g/L, and Zn = 5 μ g/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 FlowOUTFALL# 003

W ET T EST (Y OR N): Y F REQUENCY : ONCE / QUARTER A.E.C. 100% L IMIT : 10 CSR 20-7.031(3)(I)2.

A.E.C. % = 

# ( ) -1 X100

PARAMETER U NITS M AXIMUM
D AILY L IMIT W EEKLY
A VERAGE

L IMIT A VERAGE
M ONTHLY

L IMIT M ONITORING
F REQUENCY

F LOW MONITOR MONITOR DAILY

B IOCHEMICAL O XYGEN D EMAND (BOD 5 ) mg/L MONITOR MONITOR ONCE / MONTH

T OTAL S USPENDED S OLIDS lbs/day 36.056 24.036 ONCE / MONTH

T OTAL S USPENDED S OLIDS mg/L 45 30 ONCE / MONTH

P H SU 7.5-9 7.5-9 ONCE / MONTH
C ADMIUM

, T OTAL R ECOVERABLE lbs/day 0.001 ONCE / MONTH

C ADMIUM

, T OTAL R ECOVERABLE μ g/L 0.52 0.26 ONCE / MONTH

C OPPER

, T OTAL R ECOVERABLE μ g/L 11.8 5.9 ONCE / MONTH

L EAD

, T OTAL R ECOVERABLE lbs/day 0.012 ONCE / MONTH

L EAD

, T OTAL R ECOVERABLE μ g/L 6.0 2.9 ONCE / MONTH

S ELENIUM

, T OTAL R ECOVERABLE μ g/L 8.1 4.0 ONCE / MONTH

T HALLIUM

, T OTAL R ECOVERABLE μ g/L 10.3 5.1 ONCE / MONTH

Z INC

, T OTAL R ECOVERABLE lbs/day 0.512 ONCE / MONTH

Z INC

, T OTAL R ECOVERABLE μ g/L 218 109 ONCE / MONTH

OUTFALL# 005

W ET T EST (Y OR N): N F REQUENCY : A.E.C. L IMIT :

PARAMETER U NITS M AXIMUM
D AILY L IMIT W EEKLY
A VERAGE

L IMIT A VERAGE
M ONTHLY

L IMIT M ONITORING
F REQUENCY

P H SU MONITOR MONITOR ONCE / MONTH

H ARDNESS

, T OTAL mg/L MONITOR MONITOR ONCE / MONTH

C ADMIUM

, T OTAL R ECOVERABLE μ g/L MONITOR MONITOR ONCE / MONTH

C OPPER

, T OTAL R ECOVERABLE μ g/L MONITOR MONITOR ONCE / MONTH

L EAD

, T OTAL R ECOVERABLE μ g/L MONITOR MONITOR ONCE / MONTH

S ELENIUM

, T OTAL R ECOVERABLE μ g/L MONITOR MONITOR ONCE / MONTH

T HALLIUM

, T OTAL R ECOVERABLE μ g/L MONITOR MONITOR ONCE / MONTH

Z INC

, T OTAL R ECOVERABLE ONCE / MONTH μ g/L MONITOR MONITOR Design Flow + Zone of Initial Dilution Design FlowOUTFALL# 006

W ET T EST (Y OR N): Y F REQUENCY : ONCE / DISCHARGE A.E.C. 100% L IMIT : 10 CSR 20-7.031(3)(I)2.

A.E.C. % = 

# ( ) -1 X100

PARAMETER U NITS M AXIMUM
D AILY L IMIT W EEKLY
A VERAGE

L IMIT A VERAGE
M ONTHLY

L IMIT M ONITORING
F REQUENCY

F LOW MONITOR MONITOR ONCE / DISCHARGE / DAY

B IOCHEMICAL O XYGEN D EMAND (BOD 5 ) mg/L MONITOR MONITOR ONCE / DISCHARGE / DAY

T OTAL S USPENDED S OLIDS mg/L 45 30 ONCE / DISCHARGE / DAY

P H SU 7.5-9 7.5-9 ONCE / DISCHARGE / DAY

C ADMIUM

, T OTAL R ECOVERABLE μ g/L 0.52 0.26 ONCE / DISCHARGE / DAY

C OPPER

, T OTAL R ECOVERABLE μ g/L 6.8 3.4 ONCE / DISCHARGE / DAY

L EAD

, T OTAL R ECOVERABLE μ g/L 6.0 2.9 ONCE / DISCHARGE / DAY

S ELENIUM

, T OTAL R ECOVERABLE μ g/L 8.1 4.0 ONCE / DISCHARGE / DAY

T HALLIUM

, T OTAL R ECOVERABLE μ g/L 10.3 5.1 ONCE / DISCHARGE / DAY

Z INC

, T OTAL R ECOVERABLE μ g/L 218 109 ONCE / DISCHARGE / DAY

OUTFALL# 004 & S1

W ET T EST (Y OR N): N F REQUENCY : A.E.C. L IMIT :

PARAMETER U NITS M AXIMUM
D AILY L IMIT W EEKLY
A VERAGE

L IMIT A VERAGE
M ONTHLY

L IMIT M ONITORING
F REQUENCY

P H SU MONITOR MONITOR O NCE / QUARTER

T EMPERATURE o C MONITOR MONITOR O NCE / MONTH

H ARDNESS

, T OTAL mg/L MONITOR MONITOR O NCE / QUARTER

C ADMIUM

, T OTAL R ECOVERABLE μ g/L MONITOR MONITOR O NCE / QUARTER

C OPPER

, T OTAL R ECOVERABLE μ g/L MONITOR MONITOR O NCE / QUARTER

L EAD

, T OTAL R ECOVERABLE μ g/L MONITOR MONITOR O NCE / QUARTER

S ELENIUM

, T OTAL R ECOVERABLE μ g/L MONITOR MONITOR O NCE / QUARTER

T HALLIUM

, T OTAL R ECOVERABLE μ g/L MONITOR MONITOR O NCE / QUARTER

Z INC

, T OTAL R ECOVERABLE O NCE / QUARTER μ g/L MONITOR MONITOR



## Derivation and Discussion of Limits

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



### )( )*()*(

se ee ss 

### QQ QCQC C

+ +

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

Where C = downstream concentration Design Flow + Zone of Initial Dilution Design FlowC

s = upstream concentration Q

s = upstream flow (cfs)

C

e = effluent concentration Q

e = effluent flow (cfs)

Chronic wasteload allocations were determined using applicab le 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 Wa ter Quality-based Toxics Control” (EPA/505/2-90-001).

OUTFALL 001



### W ATER 

### Q UALITY AND 

### T ECHNOLOGY 

### B ASED 

### E FFLUENT 

### L IMITS

• 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 criteri a 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

C

e = ((Q

e + Q

s )C – (Q

s * C

s ))/Q

e

Summer

Chronic

C

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

C

e = 1.5 mg/L

WLA

c = 1.5 mg/L

Acute

C

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

C

e = 12.1 mg/L

WLA

a = 12.1 mg/L

LTA

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

LTA

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

Use most protective number of LTA

c or LTA

a .

MDL = 1.2(3.11)= 3.7 mg/L [CV = 0.6, 99 th Percentile] AML = 1.2(1.55)= 1.9 mg/L [CV = 0.6, 95 th Percentile, n = 4]Winter

Chronic

C

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

C

e = 3.1 mg/L

WLA

c = 3.1 mg/L

Acute

C

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

C

e = 12.2 mg/L

WLA

a = 12.2 mg/L

LTA

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

LTA

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

Use most protective number of LTA

c or LTA

a.

MDL = 2.4(3.11)= 7.5 mg/L [CV = 0.6, 99 th Percentile] AML = 2.4(1.55)= 3.7 mg/L [CV = 0.6, 95 th Percentile, n = 4]

• Fecal Coliform Discharge shall not contain more than a monthly ge ometric 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 opera ting permit will contain effluent limitati ons for E. coli which will replace fecal coliform as the applicable bacteria crite ria in Missouri’s water quality standards.

• Total Residual Chlorine . Warm water acute criteria = 19 μ g/L, warm water chronic criteria = 10 μ g/L [10 CSR 20-7.031, Table A]. Background = 0.0 mg/L.

Chronic

C

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

C

e = 10 μ g/L

WLA

c = 10 μ g/L

Acute

C

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

C

e = 19 μ g/L

WLA

a = 19 μ g/L

LTA

c = 10(0.527)= 5.3 μ g/L [CV = 0.6, 99 th Percentile]

LTA

a = 19(0.321)= 6.1 μ g/L [CV = 0.6, 99 th Percentile]

Use most protective number of LTA

c or LTA

a .

MDL = 5.3(3.11)= 16.5 μ g/L [CV = 0.6, 99 th Percentile]
AML = 5.3(1.55)= 8.2 μ g/L [CV = 0.6, 95 th 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 effl uent limits:

PRIMARY LEAD SUBCATEGORY

(j) Employee hand wash given in (lbs/10 9 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/10 9 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 co ntribution 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 cadm ium, 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 aver age 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 10 9 #) x (0.924 #/10 9 #) = 0.00066 # respirator wash (0.000713 x 10 9 #) x (1.484 #/10 9 #) = 0.00106 # employee showers (from above) = 0.0029 #

TOTAL = 0.00462 #

MONTHLY AVERAGE

LEAD (CATEGORICAL ALLOWANCES) Outfall #001

employee hand wash (0.000713 x 10 9 #) x (0.429 #/10 9 #) = 0.00031 # respirator wash (0.000713 x 10 9 #) x (0.689 #/10 9 #) = 0.00049 # employee showers (from above) = 0.0011 #

TOTAL = 0.0019 #

DAILY MAXIMUM

ZINC (CATEGORICAL ALLOWANCES) Outfall #001

employee hand wash (0.000713 x 10 9 #) x (3.366 #/10 9 #) = 0.0024 # respirator wash (0.000713 x 10 9 #) x (5.406 #/10 9 #) = 0.0039 # employee showers (from above) = 0.0106 #TOTAL = 0.0169 #

MONTHLY AVERAGE

ZINC (CATEGORICAL ALLOWANCES) Outfall #001

employee hand wash (0.000713 x 10 9 #) x (1.386 #/10 9 #) = 0.00099 # respirator wash (0.000713 x 10 9 #) x (2.226 #/10 9 #) = 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 10 9 #) x (0.660 #/10 9 #) = 0.00047 # respirator wash (DD) (0.000713 x 10 9 #) x (1.060 #/10 9 #) = 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 10 9 #) x (0.264 #/10 9 #) = 0.000188 # respirator wash (DD) (0.000713 x 10 9 #) x (0.424 #/10 9 #) = 0.000302 # employee showers (from above) = 0.0008 #

TOTAL = 0.00129 #

DAILY MAXIMUM

TSS (CATEGORICAL ALLOWANCES) Outfall #001

employee hand wash (0.000713 x 10 9 #) x (135.300 #/10 9 #) = 0.096 # respirator wash (BPT) (0.000713 x 10 9 #) x (217.300 #/10 9 #) = 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 10 9 #) x (64.350 #/10 9 #) = 0.046 # respirator wash (BPT) (0.000713 x 10 9 #) x (103.400 #/10 9 #) = 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 Tota l Suspended Solids, both the categorical mass based limit and the regulatory technology based concentration lim it will appear in the permit. In order to meet

### the mass based limit the facility must achieve less th an 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 e ffluent 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 μ g/L, chronic criteria = 10 μ g/L [10 CSR 20-7.031, Table A]. Background = 0.0 mg/L.

Chronic

C

e = ((0.5 + 0.0)10 – (0.0 * 0.0))/0.5

C

e = 10 μ g/L

WLA

c = 10 μ g/L

Acute

C

e = ((0.5 + 0.0)19 – (0.0 * 0.0))/0.5

C

e = 19 μ g/L

WLA

a = 19 μ g/L

LTA

c = 10(0.527)= 5.3 μ g/L [CV = 0.6, 99 th Percentile]

LTA

a = 19(0.321)= 6.0 μ g/L [CV = 0.6, 99 th Percentile]

Use most protective number of LTA

c or LTA

a . = 0.005 mg/L

MDL = 5.3(3.11)= 16.5 μ g/L [CV = 0.6, 99 th Percentile]
AML = 5.3(1.55)= 8.2 μ g/L [CV = 0.6, 95 th Percentile, n = 4]

• Temperature Since Big Creek is designated as “cool-water fisher y” 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 Outf all #004 shall not be more than 5 degrees F ab ove the temperature immediately above Scroggins Branch, and shall not exceed 84 degrees F.

Metals Effluent limits for Cadmium, Lead and Zinc from outfall 002 ar e set at zero because the entir e Wasteload Allocation for these

three metals are attributed to outfall 00 3. 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 translator s, partitioning between the dissolved and absorbed phases was assumed to be minimal (Section 5.7.3, EPA/505/2-90-001). Fres hwater criteria conversion fact ors 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 meta ls, hardness, and total suspended solids are provided to the department, partitioning evaluations may be considered and site-specific translators developed.C ONVERSION F ACTORS M ETAL A CUTE C HRONIC Copper 0.960 0.960

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

Chronic

C

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

C

e = 6.3 μ g/L

WLA

c = 6.3 μ g/L

LTA

c = 6.3(0.527)= 3.3 μ g/L [CV = 0.6, 99 th Percentile]

MDL = 3.3(3.11)= 10.3 μ g/L [CV = 0.6, 99 th Percentile]
AML = 3.3(1.55)= 5.1 μ g/L [CV = 0.6, 95 th Percentile, n = 4]

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

Chronic = 7.0/0.960 = 7.3 μ g/L

Acute = 13.0/0.960 = 13.5 μ g/L

Chronic

C

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

C

e = 7.3 μ g/L

WLA

c = 7.3 μ g/L

Acute

C

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

C

e = 13.5 μ g/L

WLA

a = 13.5 μ g/L

LTA

c = 7.3(0.527)=3.8 μ g/L [CV = 0.6, 99 th Percentile]

LTA

a = 13.5(0.321)=4.3 μ g/L [CV = 0.6, 99 th Percentile]

Use most protective number of LTA

c or LTA

a .

MDL = 2.2(3.11)=11.8 μ g/L [CV = 0.6, 99 th Percentile]
AML = 2.2(1.55)=5.9 μ g/L [CV = 0.6, 95 th Percentile, n = 4]

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

Chronic

C

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

C

e = 5.0 μ g/L

WLA

c = 5.0 μ g/L

LTA

c = 5.0(0.527)=2.6 μ g/L [CV = 0.6, 99 th Percentile]

MDL = 2.6(3.11)=8.1 μ g/L [CV = 0.6, 99 th Percentile]
AML = 2.6(1.55)=4.0 μ g/L [CV = 0.6, 95 th 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 dom estic 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 ni ne (6.5 – 9) standard units [10 CSR 20-7.031(4)(E)].

Metals

Effluent limitations for total recoverable metals were develo ped 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 translator s, partitioning between the dissolved and absorbed phases was assumed to be minimal (Section 5.7.3, EPA/505/2-90-001). Fres hwater criteria conversion fact ors 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 meta ls, hardness, and total suspended solids are provided to the department, partitioning evaluations may be considered and site-specific translators developed.

C ONVERSION F ACTORS M ETAL A CUTE C HRONIC

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 E FFLUENT 

### L IMITS

Daily Maximum, Dissolved Cadmium 0.5 μ g/L Daily Maximum, Dissolved Lead 5 μ g/L Daily Maximum, Dissolved Zinc 213 μ g/L

Effluent limits from the TMDL were developed to prevent exceed ance of Water Quality Standards in Big Creek and are not to be exceeded. The Maximum Daily Limit is therefore set at the TM DL 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 μ g/L

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

MDL = 0.52 μ g/L
AML = 0.17(1.55)=0.26 μ g/L [CV = 0.6, 95 th Percentile, n = 4]

• Total Recoverable Lead

WLA = 5.0/0.834 = 6.0 μ g/L

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

MDL = 6.0 μ g/L
AML = 1.9(1.55)=2.9 μ g/L [CV = 0.6, 95 th Percentile, n = 4]

• Total Recoverable Zinc

WLA = 213/0.978 = 218 μ g/L

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

MDL = 218 μ g/L
AML = 70(1.55)=109 μ g/L [CV = 0.6, 95 th Percentile, n = 4]

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

Chronic

C

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

C

e = 6.3 μ g/L

WLA

c = 6.3 μ g/L

LTA

c = 6.3(0.527)= 3.3 μ g/L [CV = 0.6, 99 th Percentile]

MDL = 3.3(3.11)= 10.3 μ g/L [CV = 0.6, 99 th Percentile]
AML = 3.3(1.55)= 5.1 μ g/L [CV = 0.6, 95 th Percentile, n = 4]

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

Chronic = 7.0/0.960 = 7.3 μ g/L

Acute = 13.0/0.960 = 13.5 μ g/L

Chronic

C

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

C

e = 7.3 μ g/L

WLA

c = 7.3 μ g/L

AcuteC

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

C

e = 13.5 μ g/L

WLA

a = 13.5 μ g/L

LTA

c = 7.3(0.527)=3.8 μ g/L [CV = 0.6, 99 th Percentile]

LTA

a = 13.5(0.321)=4.3 μ g/L [CV = 0.6, 99 th Percentile]

Use most protective number of LTA

c or LTA

a .

MDL = 2.2(3.11)=11.8 μ g/L [CV = 0.6, 99 th Percentile]
AML = 2.2(1.55)=5.9 μ g/L [CV = 0.6, 95 th Percentile, n = 4]

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

Chronic

C

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

C

e = 5.0 μ g/L

WLA

c = 5.0 μ g/L

LTA

c = 5.0(0.527)=2.6 μ g/L [CV = 0.6, 99 th Percentile]

MDL = 2.6(3.11)=8.1 μ g/L [CV = 0.6, 99 th Percentile]
AML = 2.6(1.55)=4.0 μ g/L [CV = 0.6, 95 th 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 (0.288x10 6 gal/day)(0.28 mg/L)(3.785 1/gal)(2.205x10 -6 lbs/mg) = 0.673 lbs/day

Lead monthly aver age Outfall #003 (0.288x10 6 gal/day)(0.11 mg/L)(3.785 1/gal)(2.205x10 -6 lbs/mg) = 0.264 lbs/day

Zinc daily maximum Outfall #003 (0.288x10 6 gal/day)(1.02 mg/L)(3.785 1/gal)(2.205x10 -6 lbs/mg) = 2.452 lbs/day

Zinc monthly average Outfall #003 (0.288x10 6 gal/day)(0.31 mg/L)(3.785 1/gal)(2.205x10 -6 lbs/mg) = 0.745 lbs/day

Cadmium daily maximum Outfall #003 (0.288x10 6 gal/day)(0.20 mg/L)(3.785 1/gal)(2.205x10 -6 lbs/mg) = 0.481 lbs/day

Cadmium monthly average Outfall #003 (0.288x10 6 gal/day)(0.08 mg/L)(3.785 1/gal)(2.205x10 -6 lbs/mg) = 0.192 lbs/day

TSS daily maximum Outfall #003 (0.288x10 6 gal/day)(15.0 mg/L)(3.785 1/gal)(2.205x10 -6 lbs/mg) = 36.054 lbs/day

TSS monthly average Outfall #003 (0.288x10 6 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 stormw ater 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 un its. Therefore the pH limits ar e set at 7.5-9 standard units.

Because mass based categorical limits exist for Total Susp ended 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, Le ad, 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. Mas s 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, Hardne ss, Cadmium, Copper, Lead, Selenium, Thallium and Zinc Instream monitoring to evaluate compliance with temperature standards and to ev aluate 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.