TENNESSEE DEPARTMENT OF ENVIRONMENT AND CONSERVATION DIVISION OF WATER POLLUTION CONTROL 401 CHURCH STREET L & C ANNEX 6TH FLOOR NASHVILLE TN 37243

Mr. Kevin Cook, RG CHMM 

# DEC 29 2011
Environmental Superintendent Nyrstar Clarksville, Inc. PO Box 1104 Clarksville, Th 37041


### Subject" Minor Modification NPDES Permit No, TN0029t57 

### Nyrstar Clarksville, Inc. Clarksville, Montgomery County. Tennessee

Dear Mr. Cook:

In nceordance with the provisions of "The Tennessee Water Quality Control Act" (Tennessee Code Annotated, Sections 6'l-3-101 through 69-3-120) the above referenced NPDES Permit is hereby modified by the Division of Water Pollution Control. The continuance and/or reissuance of this NPDES Pennir IS contingent upon your meeting the conditions and requirements as staled therein.

Pursuant to the pennittecs request the division made minor modifications to the permit's Attachments 2 and 3. These changes are discussed in the permit '5 Second Addendum to Rationale.

Please be advised that a petition for permit appeal may be filed, pursuant to T.CA. Section 69-3-105, subsection {i}, by the permit applicant or 

### by any aggrieved person who participated in the public comment period or gave testimony at a formal public hearing whose appeal is based upon any of the issues that were prov idcd to the conutussroner in writing during the public comment period or in testimony at a 

### formal public hearing on the permit application. Additionally, for those pennits for which the department gives public notice of a draft permit, any permit applicant or aggrieved persou may base a permit appeal on any material change to conditions in the final pcnnit from those in the draft. unless the material change has been subject to additional opportunity for public comment. Any petition for pcrmn appeal under this subsection (i) shall be filed with the board within thirty (30) days after public notice of the commissioner's decision to issue or deny the permit.

If you have questions. please contact the Nashville Environmental Field Office at 1-888-891- TDEC; or, at this office. please contact Mr. Gary Davis at (615) 532-0649 or by E-mail at GW)'.D'1l·is@/II.g01'.

Sin -crcly.

in Janjic anager, Permit Section Division of Water Pollution Control P\\H_,**Fnclo'L1r~** cc: Permit Section File Nash, ille Environmental Field Office (M il.:eThomIOrli8:m.gov) '-h Connie A. Kagey, NPDES Permit Section, ErA Region IV. Kagey.Connie@epamail.epn.go\' Mr. lhomas H Green. Jr. P.E. Senior Project Manager, ErtSafc Inc..**tgreen@;en~afe.eom** Craig Jetson. General Manager. .1'0 HO.\ llfH.**CI~r~,,\** illc. TN 37040

# STATE OF TENNESSEE

NPDES PERMIT

# ~~ MODIFIED 

## No. TN0029157 Authorization to discharge under the 

### National Pollutant Discharge Elimination System (NPDES)
Issued By

Tennessee Department of Environment and Conservation Division of Water Pollution Control 401 Church Street 6th Floor, L & 

### C Annex Nashville, Tennessee 37243-1534 Under authority of the Tennessee Water Quality Control Act of 1977 (T.e.A. 69-3-101 et seq.) and the delegation of authority from the United States Environmental Protection Agency under the Federal Water Pollution Control Act, as amended by the Clean Water Act at 1977 (33 U.SC 1251, et seq.)
Discharger: Nyrstar Clarksville, Inc.
is authorized to discharge: treated process water, sanitary wastewater, stormwater and cooling water through Outfall 001, demineralized regeneration water, water plant overflow and filter backwash through Outfall 002, stormwater runoff and cooling water through Outtalls SW3 and SW4 and stormwater runoff though Oulfalls SW5 and SW6
from a facility located:	 in Clarksville, Montgomery County, Tennessee

\0 

### receiving waters named: Cumberland River at mile 122 (Outfall 001), unnamed tributary to Cumberland River at mile 122.6 (Outfall 002), unnamed tributary to the Cumberland River at mile 121.1 (Oulfalls SW3 & 

### SW5) and unnamed tributary to the Cumberland River at mile 122.6 (Oulfall SW4 & 

### SW6)
in accordance with effluent limitations, monitoring requirements and other conditions set forth herein. This permit shall become effective on: January 1, 2012 This permit shall expire on: November 30,2015 Issuance date: November 30, 2011

Pau E Davis, Director Divi . 

### n of Water Pollution Control ROAs 2352 and 2366 CN-07S9(This pagelettblank intelllionally)

### TABLE OF CONTENTS

Page
PART I 1
A. EFFLUENT LIMIT AllONS AND MONITORING REQUIREMENTS 1 B. MONITORING PROCEDURES 5 1. Represenlalive Sampling

.

_. . 5 2. Sampling Frequency. , ............ . 5 3. Test Procedures

.. 5 4. Recording ofResults. ..,.." , 6 5. Records Retention 6 C. DEFINITIONS 6 D. ACRONYMS AND ABBREVIATIONS 9 E. REPORTING 10 1. Monitoring Results

.. . 10 2. Additional Manitoring by Permittee

.. " 11 3. Falsifying Results and/or Reports

. 11 4. Outlier Data . , , .. ..,..,........ .. 11 F. SCHEDULE OF COMPLIANCE 11
PART II 12
A. GENERAL PROVISIONS ,., ,.•, 12 1. Duty to Reapply

................ " 12 2. Right of Enrry " ,

........... . 12 3. Availability of Reports " , ... ., , ,... .. . 12 4. Proper Operotion and Maintenance

_ 12 5. Treatment Facility Failure

......... .. ,.... 13 6. Property Righls 13 7. Severability

............................ .. , ,........................................ 13 B. Other Information. 13 B. CHANGES AFFECTING THE PERMIT ,.,., 13 1. Planned Changes

. 13 2. Permit Modificatian, Revocatian, or termtnatton

.. ' ,..................................................... ... 13 3. Change of Ownership

............. , , 14 4. Change ofMoilingAddress

....................... . 15 C. NONCOMPLIANCE 15 1. Effect ofNoncompliance

.. 15 2. Reporting ofNoncomononce

.. . .. . 15 3, Sanitary Sewer Overflow

....... . 16 4. Upset

.... .. 16 5. Adverse Impoct

....... 17 6. Bypass

. . 17 7. Washout

. .. 18 D.lIABILITIES 18 1. Civil 

### ona Criminol Liability

........ .. 18 2. Liability Under Stale [ow " , , , 18
PART III , , 19
A. TOXIC POLLUTANTS 19 B. REOPENER CLAUSE 19 C. PLACEMENT OF SiGNS 20D. ANTI DEGRADATION 21 E. WASTEWATER TREATMENT FACILITIES INTEGRITY EVALUATION 21 F. PRIORITY POLLUTANTS , 21 G .CERTIFIED OPERATOR , , .., , , ••• ,.. 21
PART IV - BEST MANAGEMENT PRACTICES (BMP) PLAN 22 A, BMP GENERAL CONDITIONS ,., 22 B. BMP GENERAL REQUIREMENTS 22 C. BMP DOCUMENTATiON , , , 24 D. BMP PLAN MODIFICATION 24 E. BMP MODifiCATION FOR INEFFECTiVENESS 24 F. BMP COMPLIANCE SCHEDULE 26
PART V -STORMWATER POLLUTION PREVENTION PLAN (SWPPP) , 2S
A. POLLUTANT SOURCES AND PATHWAyS 2S B. STORMWATER CONTROLS , 2S C. FACILITY INSPECTION 26 D. SPILL PREVENTION CONTROL AND COUNTERMEASURES ,.,.,., 26 E. PLAN REVIEW UPDATE 26 F. PLAN IMPLEMENTATION , 26 G. PLAN AVAILABILITY ,., ••••• , , , 27 H. PLAN MODIFICATION 27 I. MONITORING PLAN , ••••• , 27 J. SARA mLE III, SECTION 313, PRIORITY CHEMICALS 27 K. SUPPLEMENTALSTORMWATER POLLUTION PREVENTION PLAN ISWPPP) REQUIREMENTS 29

ADDENDUM TO RATiONALE ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• AD-l RATIONALE

R2, CURRENT PERMrr STATUS , ,., , ••• R-l

APPENDICES ATIACHMENT 1 - WASTEWATER TREATMENT FACIUTY INTEGRITY EVALUATION 30 ATIACHMENT 2 - CHRONIC BIOMONrrORING IC2S TESTING PROCEDURE 31 ATIACHMENT 3 -SUPPLEMENTAL STORMWATER POLLUTION PREVENTION PLAN (SWPPP) REQUiREMENTS .•... 33

RI. D'SCHARGER ,., R-l

R3. PERMIT RENEWAL CONSiDERATIONS , , •..•.......•.•....••••••• R·2 R4. PERMITIEE'S OUTfALLS, TREATMENT SYSTEMS ,AND RECEIVING STREAMS R·2 RS. CURRENT PERMIT LIMITSAND MONITORING REQUIREMENTS R-3 R6. DiSCHARGE MONITORING REPORT (DMRI AND INSPECTION RESULTS

- R-3 R7. TECHNOLOGY BASED EfFLUENT LIMITATIONS R-3 RS. WATER QUALITYCONSIDERATIONS R-4 R9. NEW PERMIT UMITATIONSAND MONITORING REQUiREMENTS ,R-4 RIO. ANTIDEGRADATION CONSiDERATIONS ,R-9 Rl1. BMP AND SWPPP REQUIREMENTS , R-1D R12. WASTEWATER TREATMENT SYSTEM INTfGRrTY EVALUATION R·l0 R13. PERMIT DURATION , R·ll

R-l. PERMITIEE'S DISCHARGES, TREATMENT SYSTEMS, AND RECEIVING STREAMS R-12 R-2. CURRENT PERMIT LIMITSAND MONITORING REQUIREMENTS R-1S R-3. DISCHARGE MONITORING REPORT(DMR) RESULTS R-17 R-4. APPLICABLE EFflUENT UMITATIONS GUIDEUNES R-21 R-S. WATER QUALITY CONSIDERATIONS R-24 R-6. NEW PERMIT LIMITSAND MONITORING REQUiREMENTS R-34

GMDa

TNClQ2Q157 [)(X';

### Nyrstar Clarksville, Inc. NPDES Permit TN00291 57 Page 1



### PART I

A. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Nyrstar Clarksville, Inc. is authorized to discharge treated process water, sanitary wastewater, stormwater and cooling water through Outfall 001, demineralized regeneration water. water plant overflow and filter backwash through Outfall 002, stormwater runoff and cooling water through Outtalls SW3 and SW4 and stormwater runoff though Outtalls SW5 and SW6 to 

### Cumberland River at mile 122 (Outfall 001), unnamed tributary to Cumberland River at mile 122.6 (Outtall 002), unnamed tributary to the Cumberland River at mile 121.1 (Outlalls SW3 & 

### SW5) and unnamed tributary to the Cumberland River at mile 122.6 (Outtalls SW4 & 

### SW6).

These discharges shall be limited and monitored by 

### the permittee as specified below: Description: External Outfall, Number: 001, Monitoring: Effluenl Gross, Season: All Year Parameter Qualifier Value 

### .Y.!ll! Sample Type Frequency Statistical Base Arsenic, total (as As) <=; 34.45 Ibid Composite Semiannual Daily Maximum Arsenic, totat (as As) <= 17.12 Ibid Composite Semiannual Monthly Average Cadmium. total (as Cd) 2.28 Ibid Composite Twice Per Month Monthly Average Cadmium, total (as Cd) 5.29 Ibid Composite Twice Per Month Daily Maximum

Chloride Report Ibid Composite Weekly Monlhiy Average Chloride Report Ibid Composite Weekly Daily Maximum Conductivity Report umho/cm Composite Weekly Daily Maximum
Conductivity Report umhc'crn Composite Weekly Monthly Average Copper. total (as Cu) <= 33.87 Ibid Composite Quarter1y Daily Maximum
Copper. lotal (as Cu) <=; 17.43 Ibid Composite Quarterly Monthly Average
Flow Report Mgalld Recorder Continuous Daily Maximum

Flow Report Mgal/d Recorder Continuous Monthly Average
Fluoride Report Ibid Composite Monthly Daily Maximum

Fluoride Report Ibid Composite Monthly Montnly Average Lead, total (as Pb) <=; 7.41 Ibid Composite Quarterly Daily Maximum
Lead, tota' (as Pb) <=; 3.72 Ibid Composite Quarterly Monthly Average Selenium, toter (as Se) <=; 216 Ibid Composite Semiannual Daily Maximum
Selenium, toter (as Se) <'" 24.9 Ibid Composite Semiannual Monthly Average
Total Suspended <=; 4,555 Ibid Composite Once Every 2 Daily Maximum- -- ---- Nyrstar Clarksville, Inc. NPDES Permit TN0029157 Page 2

Description: External Outfall, Number: 001, Monitoring: Effluent Gross, Season: All Year

. .. Parameter QU811fler 

### :tIllLl Sample Tvpe Freauency Statistical Base . -----­**_~------~.** 

### l!!!!l Solids (TSSl Months Total Suspended Once Every 2 Monthly <= 2,459 Ibid Composite Solids (TSSl Months Average Zinc, total (as Zn) <= 27.0 Ibid Composite Weekly Daily Maximum Monthly Zinc, total (as Zn) <= 12.0 Ibid Composite Weekly Average pH >= 6.0 5U Grab (al Weekly Minimum pH <= 9.0 5U Grab (a) Weekly Maximum
(a) pH analyses shall be performed within fifteen (15) minutes of sample collection.

Description: Internal Outfall, Number: 01A, Monitoring: Effluent Gross, Season: All Year**-~-_.** ---­ ---------_.- 

## .. Parameter Qualifier



### .. lI!Li1 Sample Type Frequency Statistical Base Chloride Report IbId Grab Weekly Daily Maximum Chloride Report IbId Grab Weekly Monthly Average Conductivity Report umholcm Grab Weekly Monthly Average Conductivity Report umholcm Grab Weekly Daily Maximum Flow Report Mgal/d Recorder Continuous Daily Maximum Flow Report Mgal/d Recorder Continuous Monthly Average Fluoride Report IbId Grab Weekly Daily Maximum Fluoride Report IbId Grab Weekly Monthly Average Total Suspended Solids (T55) Report Ibid Grab Weekly Daily Maximum Total Suspended Solids (T55) Report IbId Grab Weekly Monthly Average pH Report 5U Grab (a) Weekly Daily Maximum pH Report SU Grab (a) Weekly Monthly Average 

## (a) pH analyses shall be performed within fjfteen (15) minutes of sample collection.

### Nyrstar Clarksville, Inc. NPDES Permit TN0029157 Page 3

Description; External Outfall, Number: 002, Monitoring: Effluent Gross, Season: All Year Statistical Parameter Qualifier Sample Type Frequency Base Chlorine, total residual Daily <= 0.019 mg/L Grab (a) Weekly (TRC) Maximum Monthly Flow Report Mgalld Recorder Continuous Average Daily Flow Report Mgalld Recorder Conlinuous Maximum Daily Settleable Solids <= 0.5 mUL Grab Weekly Maximum Total Suspended Solids Daily <= 40 mg/L Grab Weekly (TSS) Maximum pH >= 6.0 SU Grab (b) Weekly Minimum pH <= 90 SU Grab (b) Weekly Maximum

(a) The acceptable methods for analysis 01 TRC are any methods specified in Title 40 CFR, Part 136 as amended. The method detection level (MDL) for TRC shall not exceed 0.05 mgll unless the permittee demonstrates that its MDL is higher. The permittee shall retain the documentation that justifies the higher MDL and have it available for review upon request. In cases where the permit limit is less that the MDL, the reporting of TRG at less than the MDL shall be interpreted to consuune compliance with the permit limit. The compliance point for total residual chlorine is at the confluence orme discharge and the receiving stream. (b) pH and TRC analyses shall be performed within fifteen (15) minutes of sample collection.



### Numerical values shown below for the Outfall SW3, SW4 and SWS discharges are Benchmark/Cutoff Values and not effluent limitations.

Description: External Outfall, Number: SW3, Monitoring: Effluent Gross, Season: All Year Parameter Qualifier Unit Sample Type Frequency Statistical Base Cadmium. total (as <= 0.0159 mg/L Grab Quarterly Daily Maximum Gd) Copper, total (as <= 0.0636 mg/L Grab Quarterly Daily Maximum Go) Flow Report Mgal/d Estimate Quarterly Monthly Average Flow Report Mgalid Estimate Quarterly Daily Maximum Lead. total (as Pb) <= 0.156 mg/L Grab Quarterly Daily Maximum Total Suspended <= 150 mg/L Grab Quarterly Daily Maximum Solids (TSS) Zinc. total (as Zn) <= 0.395 mg/L Grab Quarterly Daily Maximum pH >= 5.0 SU Grab Quarterly Minimum pH <= 9.0 SU Grab Quarterly Maximum--- 

### Nyrstar Clarksville, Inc. NPDES Permit TN0029157 Page 4

Description: External Outfall, Number: SW4, Monitoring: Effluent Gross. Season: All Year**-~-----_ ---~._--_._._._**  ...

__ ..

_.- ,,_. Parameter Qualifier



### _ yalue Sample TyRe Frequency Statistical Base 

### YDl! Cadmium, total (as <= 0.0159 mgIL Grab Ouarter1y Daily Maximum Cd) Copper, total (as <= 0.0636 mgIL Grab Ouartenv Daily Maximum Co) Flow Report Mgal/d Estimate Quarterly Monthly Average
Flow Report Mgal/d Estimate Quarterly Daily Mallimum Lead, total (as Pb} <= 0.156 mg/L Grab Quarterly Daily Maximum
Total Suspended <= '50 mgIL Grab Quarterly Daily Maximum Solids (T55) Zinc, total (as Zn) <= 0.395 mgIL Grab Quarterly Daily Maximum pH >= 5.0 SU Grab Quarterly Minimum pH <= 9.0 SU Grab Quarterly Maximum

Description: External Outfall, Number: SW5, Monitoring: effluent Gross, Season: All Year**.~~~~~-~.~** -**--_._-~~~-** Parameter Qua!ifjer y!!!!!.

_ Unit Sample Type Freauency Statistical Base Cadmium, total (as <= 0.0159 mg/L Grab Quarterly Daily Maximum Cd) Copper, total (as <= 0.0636 mgIL Grab Quarterly Daily Maximum Co)
Flow Report Mgalld Estimate Quarterly Monlhly Average
Flow Report Mgalld Estimate Quarterly Daily Maximum Lead, total (as Pb) <= 0.156 mg/L Grab Quarterly Daily Maximum
Tolal Suspended <= '50 mg/L Grab Quarterly Daily Maximum Solids (T55) Zinc, total (as Zn) <= 0.395 mg/L Grab Quarterly Daily Maximum pH >= 5.0 SU Grab Quarterly Minimum pH <. 9.0 SU Grab Quarterly Maximum


### The following criteria must be used for monitoring the Outfall SW3, SW4 and SW5 discharges: a) pH analyses shall be pertormed within fifteen (15) minutes of sample collection. 

### b) The permittee must comply with the permit's Part V.K. requirements.

Additional monitoring requirements and conditions applicable to the permittee's discharges include:

• There shall be 

### no distinctly visible floaling solids, scum, foam, oily slick, or the formation of slimes, bottom deposits or sludge banks of such size or character that may be detrimental to fish and aquatic life.

### Nyrstar Clarksville, Inc. NPDES PermitTN0029157 Page 5

• The wastewater discharge shall not contain pollutants in quantities that will be hazardous or otherwise detrimental to humans, livestock, wildlife, plant life, or fish and aquatic life in the receiving stream. Sludge or any other material removed by any treatment works must be disposed of in a manner, which prevents its entrance into or pollution of any surface or subsurface waters. Additionally. the disposal of such sludge or other material must be in compliance with the Tennessee Solid Waste Disposal Act, TCA 68-31-101 et sea. and the Tennessee Hazardous Waste Management Act, TCA 68-46-101 et seg.
B,	 MONITORING PROCEDURES

1. Representative Sampling 

### Samples and measurements taken in compliance with the monitoring requirements specified herein shall be representative of the volume and nature of the monitored discharge, and shall be taken after treatment and prior to mixing with uncontaminated stormwater runoff or the receiving stream.



### 2. Sampling Frequency 

### The permittee should mark the 'No Discharge' box on the Discharge Monitoring Report form only if a permitted outfall does not discharge at any time during the monitoring period. If the outfall discharges effluent at any time durinq the monitoring period, the permittee must provide at least one sampling result from the effluent of that outfall.



### 3. Test Procedures 

### Where the permit requires sampling and monitoring of a particular effluent characterislic(s) at a frequency of less than once per day or daily, the permittee is precluded from marking the "No Discharge" block on the Discharge Monitoring Report if there has been any discharge from that particular outfall during the period which coincides with the required monitoring frequency, i.e, if the required monitoring frequency is once per month or t/rnonth, the monitoring period is one rnonlh, and if the discharge occurs during only one day in that period then the permittee must sample on that day and report the results of analyses accordingly.

a. Test procedures for the analysis of pollutants shall conform to regulations published pursuant 10 Section 304 (h) of the Clean Water Act (the "Act"), as amended, under which such procedures may be required.
b. Unless otherwise noted in the permit. all pollutant parameters shall be determined according to methods prescribed in Title 40, CFR Part 136, as amended, promulgated pursuant to Section 304 (h) of the Act. In instances where permit limits established through implementation of applicable water criteria are below analytical capabilities. compliance with those limits will be determined using the detection limits described in the TN Rules, Chapter 1200-4-3-.05(8).Nyrstar Clarksville, Inc. 

### NPDES Permit TN0029157 Page 6

4. Recording of Results
For each measurement or sample taken pursuant to the requirements of this permit, the permittee shall record the following information:

a. The exact place, date and time of sampling;


### b. The exacl person(s) collecting samples;

c. The dates and times the analyses were performed;

d. The person(s) or laboratory who performed the analyses;

e. The analytical techniques or methods used, and;

f. The results of all required analyses.



### 5. Records Retention

All records and information resulting from the monitoring activities required by this permit including all records of analyses performed and calibration and maintenance of instrumentation shall be retained for a minimum of three (3) years, or longer, if requested by the Division of Water Pollution Control.



# c. DEFINITIONS

For the purpose of this permit, 

### Annually is defined as a monitoring frequency of once every twelve (12) months beginning with the date of issuance of this permit so long as the following set of measurements for a given 12 month period are made approximately 12 months subsequent to that time.

A 

### bypass is defined as the intentional diversion of waste streams from any portion of a treatment facility.

A 

### calendar day is defined as the 24-hour period from midnight to midnight or any other 24-hour period that reasonably approximates the midnight to midnight time period.

For the purposes of this permit, a 

### Composite Sample for non-stormwater discharges is a composite sample of at least 24 grab samples collected at regular intervals over a period of 24·hours.

The 

### Daily Maximum Amount, is a limitation measured in pounds per day (Ib/day), on the total amount of any pollutant in the discharge by weight during any calendar day.

The 

### Dally Maximum Concentration is a limitation on the average concentration, in milligrams per liter (mg/L), of the discharge during any calendar day. When a proportional-toflow composite sampling device is used, the daily concentration is the concentration of that 24· hour composite; when other sampling means are used, the daily concentration is the arithmetic mean of the concentrations of equal volume samples collected during any calendar day or sampling period.

### Nyrstar Clarksville, Inc. NPDES Permit TN0029157 Page 7



### Degradation means the alteration of the properties of waters by the addition of pollutants or removal of habitat.



### De 

### Minimis

- Alterations, other than Ihose resulting in the condition of pollution or new domestic wastewater discharges, that represent either a small magnitude or a short duration shall be considered a de minimis 

### impact and will not be considered degradation for purposes of implementing the antidegradation policy. Discharges other than domestic wastewater will be considered de minimis 

### if they are temporary or use less than five percent of the available assimilative capacity for the substance being discharged. If more than one activity has been authorized in a segment and the total of the impacts uses no more than ten percent of the assimilative capacity, available habitat, or 7010 low flow, they are presumed to be de minimis. 

### Where total impacts use more than ten percent of the assimilative capacity, available habitat, or 7010 low flow they may be treated as de minimis 

### provided that the division finds on a scientific basis that the additional degradation has an insignificant effect on the resource and that no single activity is allowed to consume more than five percent of the assimilative capacity, available habitat or 7010 low flow. 

### Discharge or "discharge of a pollutant" refers to the addition of pollutants to waters from a source. 

### Dry Weather Flow shall be construed to represent discharges consisting of process and/or non-process wastewater only.

An 

### ecoregion is a relatively homogeneous area defined by similarity of climate, landform, soil, potential natural vegetation, hydrology, or other ecologically relevant variables.

The 

### geometric mean of any set of values is the nih root of the product of the individual values where 

### "n" is equal 10 the number of individual values. The geometric mean is equivalent to the antilog of the arithmetic mean of the logarithms of the individual values. For the purposes of calculating the geometric mean, values of zero (0) shall be considered to be one 

### (1 ).

A 

### Grab Sample, for the purposes of this permit, is defined as a single effluent sample of at least 100 milliliters (sample volumes <100 milliliters are allowed when specified per standard methods, latesl edition) collected at a randomly selected time over a period not exceeding 15 minutes. The sample(s) shall be collected at the period(s) most representative of the total discharge.

The 

### Instantaneous Concentration is a limitation on the concentration, in milligrams per liter (mg/L), of any pollutant contained in the discharge determined from a grab sample taken at any point in time.

The 

### monthly average amount, shall be determined by the summation of all the measured daily discharges by weight divided by the number of days during the calendar month when the measurements were made.

The 

### monthly average concentration, other than for 

### E. coli bacteria, is the arithmetic mean of all the composite or grab samples collected in a one-calendar month period.

### Nyrstar Clarksville, Inc. NPDES Permit TN0029157 Page 8



### A one week period 

### (or calendar-wee", 

### is defined as the period from Sunday through Saturday. For reporting purposes, a calendar week that contains a change of month shall be considered part of the latter month.

Pollutant 

### means sewage, industrial wastes, or other wastes.

A Qualifying Storm Event 

### is one which is greater than 0.1 inches and that occurs after a period of at least 72 hours after any previous storm event with rainfall of 0.1 inches or greater. For the purpose of this permit, a Quarter 

### is defined as anyone of the following three month periods: January 1 through March 31, April 1 through June 3D, July 1 through September 3D, or October 1 through December 31.



### A rainfall event 

### is defined as any occurrence of rain, preceded by 10 hours without precipitation that results in an accumulation of 0.01 inches or more. Instances of rainfall occurring within 10 hours of each other will be considered a single rainfall event.



### A rationale 

### (or "fact sheet") is a document that is prepared when drafting an NPDES permit or permit action. It provides the technical, regulatory and administrative basis for an agency's permit decision.



### A reference site 

### means least impacted waters within an ecoreqion that have been monitored to establish a baseline to which alterations of other waters can be compared.



### A reference condition 

### is a parameter-specific set of data from regional reference sites that establish the statistical range of values for that particular substance at least-impacted streams. For the purpose ot this permit, Semi-annually 

### means the same as "once every six months." Measurements of the eftluent characteristics concentrations may be made anytime during a 6 month period beginning from the issuance date of this permit so long as the second set of measurements for a given 12 month period are made approximately 6 months subsequent to that time, if feasible.



### A subecoregion 

### is a smaller, more homogenous area that has been delineated within an ecoregion.
Upset 

### means an exceptional incident in which there is unintentional and temporary noncompliance with technology-based effluent limitations because of factors beyond the reasonable control of the permittee. An upset does not include noncompliance to the extent caused by operational error, improperly designed treatment facilities, inadequate treatment facilities, lack ot preventive maintenance, or careless or improper operation.
The term, washout 

### is applicable to activated sludge plants and is defined as loss of mixed liquor suspended solids (MLSS) of 30.00% or more from the aeration basin(s).

Waters 

### means any and all water, public or private, on or beneath the surface of the ground, which are contained within, flow through, or border upon Tennessee or any portionNyrstar Clarksville, Inc. NPDES Permit TN0029157 Page 9

thereof except those bodies of water confined to and retained within the limits of private property in sIngle ownership which do not combine or eHect a junction with natural surface or underground waters.

The 

### weekly average amount, shall be determined by the summation of all the measured daily discharges by weight divided by the number of days during the calendar week when the measurements were made.

The 

### weekly average concentration, is the arithmetic mean of all the composite samples collected in a one-week period. The permittee must report the highest weekly average in the one-month period.


### Wet Weather Flow shall be construed 10 represent stormwater runoff which, in combination with all process and/or non-process wastewater discharges, as applicable, is discharged during a qualifying storm event.



### D. ACRONYMS AND ABBREVIATIONS

1010 -1-day minimum, 10-year recurrence interval 3005

- 30-day minimum, 5-year recurrence interval 7010 -7-day minimum, 10-year recurrence interval BAT - best available technology economically achievable BCT - best conventional pollutant control technology BOL - below detection level B00 5

- five day biochemical oxygen demand BPT - best practicable control technology currently available CB00 5 - five day carbonaceous biochemical oxygen demand CEI - compliance evaluation inspection CFR - code of federal regulations CFS - cubic feet per second CFU - colony forming units CIU - categorical industrial user CSO

- combined sewer overflow DMR - discharge monitoring report D.O.

- dissolved oxygen 

### E. coli

- Escherichia coli EFO - environmental field office LB (Ib) - pound IC?5

- inhibition concentration causing 25% reduction in survival, reproduction and growth of the test organisms IU - industrial user IWS - industrial waste survey LC 50 - acute test causing 50%, lethality MDL - method detection level MGD - million gallons per day MG/L(mg/l)

- milligrams per liter ML - minimum level of quantification ml - milliliter

### Nyrstar Clarksville, Inc. NPDES Permit TN0029157 Page 10

MLSS - mixed liquor suspended solids MOR - monthly operating report NODI - no discharge NOEC - no observed effect concentration NPDES - national pollutant discharge elimination system PL - permit limit POlW - publicly owned treatment works RDL - required detection limit SAR - semi-annual [pretreatment program) report SIU - significant industrial user SSO - sanitary sewer overflow STP - sewage treatment plant TCA - Tennessee code annotated TDEC - Tennessee Department of Environment and Conservation TIEfTRE - toxicity identification evaluationltoxicity reduction evaluation TMDL - total maximum daily load TRC - total residual chlorine TSS - total suspended solids WQBEL - water quality based effluent limit

E. REPORTING

1. Monitoring Results Monitoring results shall be recorded monthly and submitted monthly using Discharge Monitoring Report (DMR) forms supplied by the Division of Water Pollution ControL Submittals shall be postmarked no later than 15 days atter the completion of the reporting period. A completed DMR with an original signature shall be submitted to the following address:
TENNESSEE DEPT. OF ENVIRONMENT & 

### CONSERVATION DIVISION OF WATER POLLUTION CONTROL

ENFORCEMENT & 

### COMPLIANCE SECTION L & C ANNEX 6TH FLOOR

401 CHURCH STREET NASHVILLE TN 37243 A copy should be retained for the permittee's tiles. In addition, any communication regarding compliance with the conditions of this permit must be sent to the two offices listed above. The first DMR is due on the 15th of the month following permit effectiveness. DMRs and any other information or report must be signed and certified by a responsible corporate officer as defined in 40 CFR 122.22, a general partner or proprietor, or a principal municipal executive officer or ranking elected official, or his duly authorized representative. Such authorization must be submitted in writing and must explain the duties and responsibilities 

### 01 the authorized representative.

The electronic submission of DMR data will be accepted only 

### it formally approved beforehand by the division. For purposes of determining compliance with this permit, data

### Nyrstar Clarksville, Inc. NPDES Permit TN0029157 Page 11

approved by the division to be submitted electronically is legally equivalent to data submitted on signed and certified DMR forms. The permittee's electronic DMR submittal must also include as an attachment its Monthly Operating Report (MOR).



### 2. Additional Monitoring 

### by Permittee

If 

### the permittee monitors any pollutant specifically limited by this permit more frequently than required at the location(s) designated, using approved analytical methods as specified herein, the results of such monitoring shall be included in the calculation and reporting of the values required in the DMR form. Such increased frequency shall also be indicated on the form.



### 3. Falsifying Results and/or Reports Knowinqly making any false statement on any report required by this permit or falsifying any result may result in the imposition of criminal penalties as provided for in Section 309 of the Federal Water Pollution Control Act, as amended, and in Section 69-3-115 of the Tennessee Water Quality Control Act.



### 4. Outlier Data
Outlier data include analytical results that are probably false. The validity of results is based on operational knowledge and a properly implemented quality assurance program. False results may include laboratory artifacts, potential sample lampering, broken or suspect sample containers, sample contamination or similar demonstrated quality control flaw.
Outlier data are identified through a property implemented quality assurance program, and according to ASTM standards (e.g. Grubbs Test, 'h' and 'k' statistics). Furthermore, outliers should be verified, corrected, or removed, based on further inquiries into the matter. If an outlier was verified (through repeated testing and/or analysis), it should remain in the preliminary data set. If an outlier resulted from a transcription or similar clerical error, it should be corrected and subsequently reported.

Therefore. only 

### if an outlier was associated with problems in the collection or analysis of the samples and as such does not conform with the Guidelines Establishing Test Procedures for the Analysis of Pollutants (40 CFR 

### § 136), il Can be removed from the data set and not reported on the Discharge Monitoring Report forms (DMRs). Otherwise, all results (including monitoring of pollutants more frequently than required at the location(s) designated, using approved analytical methods as specified in the permit) should be included in the calculation and reporting of the values required in the DMR form. You are encouraged to use "comment" section of the DMR form (or attach additional pages), in order to explain any potential outliers or dubious results.

F. SCHEDULE OF COMPLIANCE


### Full compliance and operational levels shall be attained from the effective date of this permit.

### Nyrstar Clarksville, Inc. NPDES Permit TN0029157 Page 12

PART II



### A. GENERAL PROVISIONS



### 1. Duty 10 Reapply Permittee is not authorized to discharge atter the expiration date 01 this permit. In order to receive authorization to discharge beyond the expiration date, the permittee shall submit such information and forms as are required to the Director of Water Pollution Control (the "Director") no later than 180 days prior to the expiration date. Such applications must be properly signed and certified.

2. Right 01 Enlry The permittee shall allow the Director, the Regional Administrator of the U.S. Environmental Protection Agency, or their authorized representatives, upon the presentation of credentials:

a. To enter upon the permittee's premises where an effluent source is located or where records are required to be kept under the terms and conditions of this permit, and at reasonable times to copy these records;
b. To inspect at reasonable times any monitoring equipment or method or any collection, treatment, pollution management, or discharge facilities required under this permit; and

c. To sample at reasonable times any discharge of pollutants.

3. Availability 01 Reports

Except 10r data determined to be confidential under Section 308 of the Federal Water Pollution Control Act, as amended, all reports prepared in accordance with the terms of this permit shall be available for public inspection at the 

### oHices of the Division of Water Pollution Control. As required by the Federal Act. eHluentdata shall not be considered confidential.



### 4. Proper Operation and Maintenance



### a. The permrtlee shall at all times properly operate and maintain all facilities and systems (and related appurtenances) for collection and treatment which are installed or used by the permittee to achieve compliance with the terms and conditions of this permit. Proper operation and maintenance also includes adequate laboratory and process controls and appropriate quality assurance procedures. This provision requires the operation of backup or auxiliary facilities or similar systems, which are installed by a permittee only when the operation is necessary to achieve compliance with the conditions of the permit. Backup continuous pH and flow monitoring equipment are not required.

### Nyrstar Clarksville, Inc. NPDES PermitTN0029157 Page 13

b. DIlution water shall not be added to comply with effluent requirements to achieve BCT, BPT, BAT and or other technoloqy-based effluent limitations such as those in State of Tennessee Rule 1200-4-5-.09.

5. Treatment Facility Failure The permittee, in order to maintain compliance with this permit, shall control production, all discharges, or both, upon reduction, loss, or failure of the treatment facility, until the facility is restored or an alternative method of treatment is provided. This requirement applies in such situations as the reduction, loss, or failure of the primary source of power.

6. Property Rights The issuance of this permit does not convey any property rights in either real or personal property. or any exclusive privileges, nor does it authorize any injury to private property or any invasion of personal rights, nor any infringement of Federal. State, or local laws or regulations.

7. Severability The provisions of this permit are severable. If 

### any provision of this permit due to any circumstance, is held invalid, then the application or such provision to other circumstances and to the remainder of this permit shall not be affected thereby.

8. Other Information

If the permitlee becomes aware that he failed to submit any relevant facts in a permit application, or submitted incorrect information in a permit application or in any report to the Director, then he shall promptly submit such facts or information.



### B. CHANGES AFFECTING THE PERMIT

1. Planned Changes The permittee shall give notice to the Director as soon as possible of any planned physical alterations or additions to the permitted facility. Notice is required only when:

a. The alteration or addition to a permitted facility may meet one of the criteria for determining whether a facility is a new source in 40 CFR 122.29(b); or

b. The alteration or addition could significantly change the nature or increase the quantity of pollutants discharged. This notification applies to pollutants which are subject neither to effluent limitations in the permit, nor to notification requirements under 40 CFR 122.42(a)(1).

2. Permit Modification, Revocation, Or Termination

### Nyrstar Clarksville, Inc. NPDES Permit TN0029157 Page 14



### a. This permit may be modified, revoked and reissued, or terminated for cause as described in 40 CFR 122.62 and 122.64, Federal Register, Volume 49, No. 1BB (Wednesday, September 26, 1964), as amended.


### b. The permittee shall furnish to the Director, within a reasonable time, any information which the Director may request to determine whether cause exists for modifying, revoking and reissuing, or terminating this permit, or to determine compliance with this permit. The permittee shall also furnish to the Director, upon request, copies of records required to be kept by this permit.

c. If 

### any applicable effluent standard or prohibition (including any schedule of compliance specified in such effluent standard or prohibition) is established for any toxic pollutant under Section 307(a) of the Federal Water Pollution Control Act, as amended, the Director shall modify or revoke and reissue the permit to conform to the prohibition or to the effluent standard, providing that the effluent standard is more stringent than the limitation in the permit on the toxic pollutant. The permittee shall comply with these effluent standards or prohibitions within the time provided in the regulations that establish these standards or prohibitions, even if the permit has not yet been modified or revoked and reissued to incorporate the requirement.
d. The filing of a request by the permittee for a modification, revocation, reissuance, termination, or notification of planned changes or anticipated noncompliance does not halt any permit condition.



### 3. Change 01 Ownership This permit may be transferred to another party (provided there are neither modifications to the facility or its operations, nor any other changes which might affect the permit limits and conditions contained in the permit) by the permittee if:

a. The permittee notifies the Director of the proposed transfer at least 30 days in advance of the proposed transfer date;
b. The notice includes a written agreement between the existing and new permittees containing a specified date for transfer of permit responsibility, coverage, and liability between them; and

c. The Director, within 30 days, does not notify the current permittee and the new permittee of his intent to modify, revoke or reissue, or terminate the permit and to require that a new application be filed rather than agreeing to the transfer of the permit. Pursuant to the requirements of 40 CFR 122.61, concerning transfer of ownership, the permittee must provide the following information to the division in their formal notice of intent to transfer ownership: 1) the NPDES permit number of the subject permit; 2) the effective date of the proposed transfer; 3) the name and address of the transferor: 4) the name and address of the transferee; 5) the names of the responsible parties for both the transferor and transferee; 6) a statement that the transferee assumes responsibility for the subject NPDES permit; 7) a statement that the transferor relinquishes responsibility for the subject NPDES permit; 8) the signatures of the responsible parties for both the transferor and transferee pursuant to the

### Nyrstar Clarksville, Inc. NPDES Permit TN0029157 Page 15

requirements of 40 CFR 122.22(a), "Signatories to permit applications"; and, 9) a statement regarding any proposed modifications to the facility, its operations, or any other changes which might affect the permit limits and conditions contained in the permit.



### 4. Change or Mailing Address

The permittee shall promptly provide to the Director written notice of any change of mailing address. In the absence of such notice the original address of the permittee will be assumed to be correct.



### C. NONCOMPLIANCE

1. Effect of Noncompliance

All discharges shall be consistent with the terms and conditions of this permit. Any permit noncompliance constitutes a violation of applicable State and Federal laws and is grounds for enforcement action, permit termination, permit modification. or denial of permit reissuance.



### 2. Reporting or Noncompliance

a. 24·Hour Reporting In the case of any noncompliance which could cause a threat to public drinking supplies, or any other discharge which could constitute a threat to human health or the environment, the required notice of non-compliance shall be provided to the Division of Waler Pollution Control in the appropriate regional Field Office within 24-hours from the time the permittee becomes aware of the circumstances. (The regional Field Office should be contacted for names and phone numbers of environmental response personnel).

A written submission must be provided within five calendar days of the time the permittee becomes aware of the circumstances, unless this requirement is waived by the Director on a case-by-case basis. The permittee shall provide the Director with the following information:

i. 

### A description of the discharge and cause of noncompliance;

II. 

### The period of noncompliance, including exact dates and times or. jf not corrected, the anticipated time the noncompliance is expected to continue: and

iii. The steps being taken to reduce, eliminate, and prevent recurrence of the noncomplying discharge.


### b. Scheduled Reporting

For instances of noncompliance which are not reported under subparagraph 2.a. above, the permittee shall report the noncompliance on the Discharge Monitoring Report. The report shall contain all information concerning the steps taken, or planned,

### Nyrstar Clarksville, Inc. NPDES Permit TN0029157 Page 16

to reduce, eliminate, and prevent recurrence of the violation and the anticipated time the violation is expected to continue.



### 3. Sanitary Sewer Overflow

a. 

### "Sanitary sewer Overl/ow" means the discharge to land or water of wastes from any portion of the collection, transmission, or treatment system other than through permitted outfalls.
b. Sanitary Sewer Overllows are prohibited.

c. The permittee shall operate the collection system so as to avoid sanitary sewer overllows. No new or additional flows shall be added upstream of any point in the collection system, which experiences chronic sanitary sewer overllows (greater than 5 events per year) or would otherwise overload any portion of the system.
d. Unless there is specific enforcement action to the contrary, the permittee is relieved 01 this requirement after: 1) an authorized representative of the Commissioner of the Department of Environment and Conservation has approved an engineering report and construction plans and specifications prepared in accordance with accepted engineering practices for correction of the problem; 2) the correction work is underway: and 3) the cumulative, peak-design, flows potentially added from new connections and line extensions upstream of any chronic overllow point are less than or proportional to the amount of inflow and infiltration removal documented upstream of that point. The inflow and infiltration reduction must be measured by the permittee using practices that are customary in the environmental engineering field and reported in an attachment to a Monthly Operating Report submitted to the regional TDEC Field Office. The data measurement period shall be sufficient to account for seasonal rainfall patterns and seasonal groundwater table elevations.

e. In the event that more than five (5) sanitary sewer overflows have occurred froma single point in the collection system for reasons that may not warrant the selfimposed moratorium or completion of the actions identified in this paragraph, the permittee may request a meeting with the Division of Water Pollution Control field office staff to petition for a waiver based on mitigating evidence.



### 4. Upset

a. 

### "Upser means an exceptional incident in which there is unintentional and temporary noncompliance with technology-based effluent limitations because of factors beyond the reasonable control of the permittee. An upset does not include noncompliance to the extent caused by operational error, improperly designed treatment facilities, inadequate treatment facilities, lack of preventive maintenance, or careless or improper operation.
b. An upset shall constitute an affirmative defense to an action brought for noncompliance with such technology-based permit effluent limitations if the permittee demonstrates, through properly signed, contemporaneous operating logs. or other relevant evidence that:

### Nyrstar Clarksville, Inc. NPDES Permit TN0029157 Page 17

I. 

### An upset occurred and that the permittee can identify the cause(s) 01 the upset;

II. 

### The permitted facility was at the time being operated in a prudent and workman-like manner and in compliance with proper operation and maintenance procedures;

III. 

### The permittee submitted information required under "Reporting of Noncompliance" within 24-hours of becoming aware of the upset (if this information is provided orally, a written submission must be provided within five days); and

iv. The permittee complied with any remedial measures required under "Adverse Impact."



### 5. Adverse Impact 

### The permittee shall take all reasonable steps to minimize any adverse impact to the waters of Tennessee resulting from noncompliance with this permit, including such accelerated or additional monitoring as necessary to determine the nature and impact of the noncomplying discharge. It shall not be a defense for the permittee in an enforcement action that it would have been necessary to halt or reduce the permitted activity in order to maintain compliance with the conditions of this permit.

6. Bypass

a. 

### "Bypass" is the intentional diversion of wastewater away from any portion of a treatment facility. "Severe property damage" means substantial physical damage to property, damage to the treatment facilities, which would cause them to become inoperable, or substantial and permanent loss of natural resources which can reasonably be expected to occur in the absence of a bypass. Severe property damage does not mean economic loss caused by delays in production.
b. Bypasses are prohibited unless the following 3 conditions are met:


### i. The bypass is unavoidable to prevent loss of life, personal injury, or severe property damage: il.	 There are not feasible alternatives to bypass, such as the use of auxiliary treatment facilities, retention of untreated wastes, or maintenance during normal periods of equipment down-time. This condition is not satisfied if adequate back-up equipment should have been installed in the exercise of reasonable engineering judgment to prevent a bypass, which occurred during normal periods of equipment down-time or preventative maintenance; Ill.	 The permittee submits notice of an unanticipated bypass to the Division of Water Pollution Control in the appropriate environmental assistance center within 24-hours of becoming aware of the bypass (if this information is provided orally, a written submission must be provided within five days). When the need for the bypass is foreseeable, prior

### Nyrstar Clarksville, Inc. NPDES Permit TN0029157 Page 18

notification shall be submitted to the Director, if possible, at least 10 days before the date of the bypass.

c. Bypasses not exceeding limitations are allowed only 

### if the bypass is necessary for essential maintenance to assure efficient operation. All other bypasses are prohibited. Allowable bypasses not exceeding limitations are not subject to the reporting requirements of 6.b.iii, above.



### 7. Washout



### a. For domestic wastewater plants only, a 'washout' shall be defined as loss of Mixed Uquor Suspended Solids (MLSS) of 30.00% or more. This refers to the MLSS in the aeration basin(s) only. This does not include MLSS decrease due to solids wasting to the sludge disposal system. A washout can be caused by improper operation or from peak flows due to infiltration and inflow.

b. A washout is prohibited. If a washout occurs the permittee must report the incident to the Division of Water Pollution Control in the appropriate regional Field Office within 24-hours by telephone. A written submission must be provided within 5 days. The washout must be noted on the discharge monitoring report. Each day of a washout is a separate violation.

D. LIABILITIES



### 1. Civil and Criminal Liability 

### Except as provided in permit conditions for MBypassing,- 

### "Overflow," and "Upset," nothing in this permit shall be construed to relieve the permittee from civil or criminal penalties for noncompliance. Notwithstanding this permit, the permittee shall remain liable for any damages sustained by the State of Tennessee, including but not limited to fish kills and losses of aquatic life and/or wildlife, as a result of the discharge of wastewater to any surface or subsurface waters. Additionally, notwithstanding this Permit, it shall be the responsibility of the permittee to conduct its wastewater treatment and/or discharge activities in a manner such that public or private nuisances or health hazards will not be created.


### 2. Liability Under Slale Law Nothing in this pennit shall be construed to preclude the institution of any legal action or relieve the permittee from any responsibilities, liabilities, or penalties established pursuant to any applicable State law or the Federal Water Pollution Control Act, as amended.

### Nyrstar Clarksville, Inc. NPOES Permit TN0029157 Page 19

PART III

OTHER REQUIREMENTS

A. TOXIC POLLUTANTS The permittee shall notify the Division of Water Pollution Control as soon as it knows or has reason to believe:

1. That any activity has occurred or will occur which would result in the discharge on a routine or frequent basis, of any toxic suostancets) (listed at 40 CFR 122, Appendix D, Table II and 111) which is not limited in the permit, if that discharge will exceed the highest of the following "notification levels":

a. One hundred micrograms per liter (100 ugll);
b. Two hundred micrograms per liter (200 ugll) for acrolein and acrylonitrile; five hundred micrograms per liter (500 ugll) for 2,4-dinrtrophenol and for 2-methyl-4,6-dinitrophenol: and one milligram per liter (1 mg/L) for antimony;

c. Five (5) times the maximum concentration value reported tor that pollutant(s) in the permit application in accordance with 122.21 (g)(7); or
d. The level established by the Director in accordance with 122.44(f).

2. That any activity has occurred or will occur which would result in any discharge, on a non-routine or infrequent basis, of a toxic pollutant which is not limited in the permit. if that discharge will exceed the highest of the following "notification levels":

a. Five hundred micrograms per liter (500 ugll);
b. One milligram per liter (1 mg/L) for antimony;

c. Ten (10) times the maximum concentration value reported for that pollutant in the permit application In accordance with 122.21(g)(7); or
d. The level established by the Director in accordance with 122.44(f).

B. REOPENER CLAUSE

If 

### an applicable standard or limitation is promulgated under Sections 301(b)(2)(C) and (0), 304(6)(2), and 307(a)(2) and that effluent standard or limitation is more stringent than any effluent limitation in the permit or controls a pollutant not limited in the permit, the permit shall be promptly modified or revoked and reissued to conform to that effluent standard or limitation.Nyrstar Clarksville, Inc. 

### NPDES Permit TN00291 57 Page 

### 20

If warranted to protect water quality, the division may reopen the permit for modification 

### based on the washwater characteristics from the permittee's new Crude Zinc Oxide facility Form 2C submittal with IC25 test results. Also, permit modification may be warranted based on 

### results from the permittee's wastewater treatment facilities integrity evaluation. Any permit modification will be subject to applicable public participation procedures.

The permittee must notify the division 

### if during the term of the permit the Outfall SW6 discharge 

### becomes subject to stormwater runoff from active industrial activity, and the division may reopen the permit to add monitoring/BMP upgrade requirements pursuant to applicable benchmark/cutoff values. During the permit term, the permittee may request that the division reopen the permit to include revised benchmark/cutoff values that are specific to its operation given its unique on-site activities, based on justification information provided by the permittee.

C. PLACEMENT OF SIGNS Within sixty (60) days of the effective date of this permit, the permittee shall place and maintain a sign(s) at each outfall and any bypass/ovetilow point in the collection system. For the purposes of this requirement, any bypass/ovetilow point that has discharged five (5) or more times in the last year must be so posted. The sign(s) should be clearly visible to the public from the bank and the receiving stream or from the nearest public property/right-of-way, if applicable. The minimum sign size should be two feet by two feet (2' x 2') with one inch (1") letters. The sign should be made of durable material and have a white background with black letters. The sign(s) are to provide notice to the public as to the nature of the discharge and, in the case of the permitted outfalls, that the discharge is regulated by the Tennessee Department of Environment and Conservation, Division of Water Pollution Control. The following is given as an example of the minimal amount of information that must be included on the sign:
TREATED INDUSTRIAL WASTEWATER OUTFALL 001 Nyrstar Clarksville, Inc. 

### (Permittee's Phone Number) NPDES Permit NO. 1)10029157 TENNESSEE DIVISION OF WATER POLLUTION CONTROL 1-888-891-8332 ENVIRONMENTAL FIELD OFFICE - Nashville
INDUSTRIAL WASTEWATER OUTFALL 002 Nyrstar Clarksville, Inc. 

### (Permittee's Phone Number) NPDES Permit NO. 1)10029157 TENNESSEE DIVISION OF WATER POLLUTION CON11l0L 1-888-891-8332 ENVIRONMENTAL FIELD OFFICE - Nashville
INDUS11llAL NON-PROCESS WASTEWATER AND STORMWATER RUNOFF OUTFALLSW3

Nyrstar Clarksville, Inc. (Permittee's Phone Number) NPDES Penn it NO. 1)10029157 TENNESSEE DIVISION OF WATER POLLUTION CONTROL 1-888-891-8332 ENVIRONMENTAL FIELD OFFICE - Nashville

### Nyrstar Clarksville, Inc. NPDES Permit TN0029157 Page 21

The same sign format as Outfall SW3 should be used lor Outfall SW4.

INDUSTRIAL STORMWATER RUNOFF OUTFALL SW5 Nyrstar Clarksville, Inc. (Permittee's Phone Number) NPDES Permit NO. TNOO29157 TENNESSEE DIVISION OF WATER POLLUTION CONTROL 1-888-891-8332 ENVIRONMENTAL FIELD OFFICE - Nashville The same sign format as Outfall SW5 should be used lor Outfall SW6.

D. ANTIDEGRADATION

Pursuant to the Rules of the Tennessee Department of Environment and Conservation, Chapter 1200-4-3-.06, titled 'Tennessee Antidegradation Statement," and in consideration of the Department's directive in attaining the greatest degree of effluent reduction achievable in municipal, industrial, and other wastes, the permittee shall further be required, pursuant to Ihe terms and conditions of this permit, to comply with Ihe effluent limitations and schedules of compliance required to implement applicable water quality standards, to comply with a State Water Quality Plan or other State or Federal laws or regulations, or where practicable, to comply with a standard permitting no discharge of pollutants.

E. WASTEWATER TREATMENT FACILITIES INTEGRITY EVALUATION

The wastewater treatment facilities integrity evaluation permit requirements are presented in Attachment 1.

F. PRIORITY POLLUTANTS Within two (2) years from the permit's effective date, the permittee shall submit to the division of Water Pollution Control a completed Application Form 2C - Wastewater Discharge Information, Consolidated Permits Program (EPA Form 3510-2C) for the washwater from Ihe permittee's recently constructed Crude Zinc Oxide facility. The submittal must also include the IC25 testing results, pursuant to the procedure presented in Attachment 2,
G. CERTIFIED OPERATOR

The wastewater treatment facilities shall be operated under the supervision of a wastewater system certified operator and the collection system operated under the supervision of a Collection System certified operator in accordance with the Water Environmental Health Act of 1984.

### Nyrstar Clarksville, Inc. NPDES Permit TN0029157 Page 22

PART IV

BEST MANAGEMENT PRACTICES CONDITIONS The permittee may consolidate the elements presented in Part IV (Best Management Practices Conditions) and Part V (Stormwater Pollution Prevention Plan) into a single BMP/SWPPP document as an overall control program for its facility.



### A. BMP GENERAL CONDITIONS For purposes of this part, the terms "pollutant" or "pollutants" refer to any substance listed as toxic under Section 307(a)(l) of the Clean Water Act, oil, as defined in Section 311 (a)(l) of the Act, and any substance listed as hazardous under Section 311 of the Act. The permittee shall develop and implement a Best Management Practices (BMP) plan which prevents, or minimizes the potential for, the release of pollutants (including oil and grease) from ancillary activities, 

### including material storage areas; plant site runoff; in-plant transfer, process and material handling areas; loading and unloading operations, and sludge and waste disposal areas, to the waters of the State of Tennessee through plant site runoff; spillage or leaks; sludge or waste disposal; or drainage from raw material storage.

B. BMP GENERAL REQUIREMENTS The BMP program shall:

1. Be documented in narrative form, and shall include any necessary plot plans, drawings, or maps;

2. Establish specific objectives for the control of toxic and hazardous pollutants:

a. Each facility component or system shall be examined for its potential for causing a release of significant amounts of toxic or hazardous pollutants to waters of the State of Tennessee due to equipment failure, improper operation, natural phenomena such as rain or snowfall, etc.;
b. Where experience indicates a reasonable potential for equipment failure (e.g., a tank overflow or leakage), natural condition (e.g., precipitation), or other circumstances to result in significant amounts of toxic or hazardous pollutants reaching surface waters, the plan should include a prediction of the direction, rate of flow, and total quantity of toxic or hazardous pollutants which could be discharged from the facility as a result of each condition or circumstance;
3. Establish specific best management practices to meet the objectives identified under section B.2. contained herein, addressing each component or system capable of causing a release of significant amounts of toxic or hazardous pollutants to the waters of the State of Tennessee;

4. The BMP program:

### Nyrstar Clarksville, Inc. NPDES Permit TN0029157 Page 23

a. May reflect requirements for Spill Prevention Control and Countermeasure (SPCC) plans under section 311 of the Act and Title 40 CFR part 112, and may incorporate any part of such plans into the BMP program by reference;
b. Shall assure the proper management of solid and hazardous waste in accordance with regulations promulgated under the Solid Waste Disposal Act, as amended by the Resource Conservation and Recovery Act of 1976 (RCRA) (40 U.S.C. §6901, et. seg.). Management practices required under RCRA regulations shall be expressly incorporated inlo the BMP program; and,

c. Shall address the following points for the ancillary activities listed in section A.l.:

i. 

### Statement of policy: Ii. 

### Spill Control Committee: responsible for BMP program implementation and subsequent review and updating; iii. Material inventory: identification of all sources and quantities of toxic and hazardous substances handled or produced, including plant drawings and plot plans, materials flow diagrams, physical, chemical, toxicological, and health information on toxic and hazardous substances, and investigation and evaluation of new materials: iv. Material compatibility: evaluation of process changes or revisions for materials compatibility, review of properties of chemicals handled and materials of construction, evaluation of means of chemical disposal and incompatibility, cleansing of vessels and transfer lines, and use of proper coatings and cathodic protection on buried pipelines if required; v. Employee training: meetings to be held at frequent intervals, spill drills, adequate job training, transmission of information on past spills and causes, informing employees of BMP program components, training in cleanup procedures, and review and interface with safety program; vi. Reporting and notification procedures: maintenance of records of spills through formal reports for internal review, notification as required by law to governmental and environmental agencies in the event of a spill, and procedures for notifying the appropriate plant personnel; vii. Visual inspections:	 routine inspections with visual observations of storage facilities, transfer pipelines, and loading and unloading areas, detailed inspections of pipes, pumps, valves, fittings, tank corrosion, tank support and foundation deterioration, etc.; viii. Preventive maintenance:	 identification of equipment and systems to which the preventive maintenance program should apply, periodic inspection and testing of such equipment and systems, appropriate adjustment, repair, or replacement of parts, and maintenance of preventive maintenance records; ix. Good housekeeping:	 neat and orderly storage of chemicals, prompt removal of small spillage, regular garbage pickup, maintenance of dry and clean floors, proper pathways and walkways, minimum

### Nyrstar Clarksville, Inc. NPDES Permit TN0029157 Page 24

accumulation of liquid and solid chemicals on the ground or floor in a building, and stimulation of employee interest in good housekeeping; x. Security: plant patrols, fencing, good lighting, traffic control, controlled access where appropriate, visitor passes, locked entrances, locks on drain valves and pumps for chemical storage tanks, and television monitoring.

Note: Additional technical information on BMPs and the elements of a BMP program is contained in EPA publications entitled "Guidance Manual for Developing Best Management Practices (BMP)" (EPA 833-B-93-004) and "Storrnwater Management for Industrial Activities: Developing Pollution Prevention Plans and Best Management Practices" (EPA 832-R-92-006).


### C. BMP DOCUMENTATION

The permittee shall maintain the BMP plan at the facility and shall make the plan available to the permit issuing authority upon request.



### D. BMP PLAN MODIFICATION

The permittee shall amend the BMP plan whenever there is a change in the facility or change in the operation of the facility, which materially increases the potential for the ancillary activities to result in a discharge of significant amounts of pollutants.



### E. BMP MODIFICATION FOR INEFFECTIVENESS If the BMP plan proves to be ineffective in achieving the general objective at preventing the release of significant amounts of pollutants to surface waters and the specific objectives and requirements under section B, the permit shall be subject to modification pursuant to 40 CFR 122.62 or 122.63 to incorporate revised BMP requirements. Any such permit modification shall be SUbject to review in accordance with the procedures for permit appeals set forfh in accordance with 69·3-110, Tennessee Code Annotated.



### F. BMP COMPLIANCE SCHEDULE

Unless the permittee is otherwtse authorized by the division in writing, the BMP Plan shall be completed as follows:

1. The plan shall be developed and available for review within 90 days after permit's effective date.

2. The permittee shall begin implementation of the BMP Plan as soon as possible, but not later than 120 days after permit coverage. Where new construction is necessary to implement the management plan, a construction schedule shall be included. Construction shall be completed as soon as possible.

3. The permittee shall fully complete the approved BMP Plan, incluoinq all necessary construction, and be in full compliance with the Act, within six months fOllowing initial implementation of the Plan.

### Nyrstar Clarksville, Inc. NPOES Permit TN0029t57 Page 

### 25

PART V

STORMWATER POLLUTION PREVENTION PLAN (SWPPP)
The permittee may consolidate the elements presented in Part IV Best Management Practices Conditions (BMP) and Part V Stormwater Pollution Prevention Plan (SWPPP) into a single BMP/SWPPP document as an overall control program for its facility. The permittee must develop, document and maintain a stormwater pollution prevention plan (SWPPP) pursuant to the requirements as set forth in the Tennessee Multi-Sector General Permit (TMSP) for Industrial Activities. The plan shall be signed by either a principal executive officer of a corporation, the owner or proprietor of a sale proprietorship, or a partner or general partner of a partnership. The SWPPP as developed and implemented shall be site specific to the permitted facility with regard to the general terms and conditions outlined in the TMSP and, at a minimum, shall contain the following items:

A. POLLUTANT SOURCES AND PATHWAYS 1. A site map outlining the individual stormwater drainage areas, existing structural control measures, surface water bodies, and sinkholes

2. A narrative description of significant materials (40 CFR 122.26) that are currently or in the past have been treated, stored, or disposed outside; materials management practices; existing structural and non-structural control measures to reduce pollutants; and a description of any stormwater treatment

3. A list of significant spills and leaks of toxic or hazardous pollutants at the facility that have taken place after the effective date of the permit

4. A prediction of direction of flow and the possible pollutants associated with each area of the plant that generates stormwater

5. A record of available sampling data describing pollutants in stormwater discharges

B. STORMWATER MANAGEMENT CONTROLS 1. Formulate a pollution prevention team with named individuals who will develop the stormwater prevention plan and assist plant manager in its implementation.

2. Inventory types of materials handled and associated potential of release to stormwater. Evaluate the following for potential pollutant contribution: loading and unloading operations,outdoor storage and manufacturing activities, dust or particulate generating processes, and onsite waste disposal practices. Consider toxicity of chemicals, quantity of chemicals, and history of leaks or spills of toxic or hazardous pollutants. 3, Design a preventive maintenance program including inspection and maintenance of stormwater management devices and testing plant equipment and systems to uncover conditions, which could cause failures.Nyrstar Clarksville, Inc. NPDES Permit TN0029157 Page 26

4. Maintain a clean, orderly facility.

5. Establish prevention and response procedures. Identify potential spill areas and drainage points. Specify material handling procedures and storage requirements. Identify spin cleanup procedures and provide to responsible personnel. Make available to responsible personnel the necessary equipment to implement cleanup at all times when the facility is in operation.
6. Include in the plan a narrative of traditional stormwater management practices, i.e., other than those that control the source of pollutants.

7. Identify areas of potentially high soil erosion and measures to limit erosion.

8. Train' employees at all levels of responsibility in the components of the stormwater prevention plan.

9. Identify qualified personnel to inspect equipment, plant areas, and material handling areas. Develop a tracking system to ensure corrective action and maintain records of inspections.

10. Designate a person in the plan who will keep records of spills or other discharges, inspections and maintenance activities, and information describing the quality and quantity of stormwater discharges.

11. Identify any non-stormwater discharges, and their sourcots). associated with the stormwater outtalls. In the event non-storrnwater discharges are discovered in combination with the stormwater discharges, the permittee must submit the appropriate EPA form(s) for the characterization of these non-stormwater discharges as warranted. C. FACILITY INSPECTION Responsible personts) named in the plan will inspect the facility at least semi-annually for the accuracy of the plan and maps, adequate measures to reduce pollutants in stormwater runoff, and the need for additional controls. Records of these inspections will be maintained for a period of three years. D. SPILL PREVENTION CONmOL AND COUNTERMEASURES Stormwater management programs may reflect requirements for spill prevention control and countermeasures (SPCC) plans under section 311 ot the CWA. E. PLAN REVIEW AND UPDATE The plan will be reviewed and updated, jf necessary, by the facility at least annually. The plan and all records will be retained for at least three years after expiration of this permit.
F. PLAN IMPLEMENTATION The plan should be developed and available for review within 30 days after permit coverage. Facilities should implement the management practices as soon as possible, but not later than one year after permit coverage. Where new construction is necessary to implement the management plan, a construction schedule should be included. Construction should be completed as soon as possible.

### Nyrstar Clarksville, Inc. NPDES Permit TN0029157 Page 27



### G. PLAN AVAILABILITY The discharger shall maintain the plan on site, or at a nearby office. Copies of the plan will be submitted to the Division of Water Pollution Control within ten business days of any request.

H. PLAN MODIFICATION The plan will be modified as required by the Director of the Division of Water Pollution Control.
I. 

### MONITORING PLAN The stormwater discharges will be monitored as required in Part l. Section A., Effluent Limits and MonItoring Requirements, applicable to stormwater outtaus. For each outfall monitored, the surtace area and type of cover. for example, roof, pavement, grassy areas, gravel, will be identified.



### J. SARA TITLE III, SECTION 313 PRIORITY CHEMICALS The SWPPP shall include the following for those facilities subject to reporting requirements under SARA Title 111, Seclion 

### 313 for chemicals that are classified as Section 

### 313 waler priority chemicals:



### 1. tn areas where Section 

### 313 priority chemicals are stored, processed or otherwise handled, appropriate containment, drainage control and/or diversionary structures will be provided. AI a minimum, one of the following preventive systems or its equivalent will be used:

a. Curbing, culverting, gutters, sewers or other forms of drainage control

b. Roofs, covers or other forms or protection to prevent storage piles from exposure to stormwater and wind

2. The plan will include a discussion of measures taken to conform with the following applicable guidelines:

a. In liquid storage areas where stormwater comes into contact with any equipment tank container, or other vessel used for Section 

### 313 water priority chemicals,
i. the tank or container must be compatible with Section 

### 313 water priority chemical which it stores and
ii. the liquid storage areas shall be operated to minimize discharge of Section 

### 313 chemicals.
b. Material storage areas for Section 

### 313 water priority chemicals, other than liquids, will incorporate features that will minimize the discharge of Section 

### 313 chemicals by reducing stormwater contact.

c. Truck and rail car loading and unloading areas for Section 

### 313 liquid chemicals will be operated to minimize discharges of chemicals. Appropriate measures may include placement and maintenance of drip pans tor use when making and breaking hose connections; a spill contingency plan; and/or other equivalent measures.

### Nyrstar Clarksville, Inc. NPDES Permit TN0029157 Page 28



### d. In plant areas where Section 313 chemicals are transferred, processed or handled, piping, processing equipment, and materials handling equipment will be operated so as to minimize discharges of chemicals. Piping and equipment must be compatible with chemicals handled. Additional protection, including covers and guards to prevent exposure to wind, pressure relief vents, and overhangs or door skirts to enclose trailer ends at truck loading docks, will be 

### implemented. Visual inspections or leak tests will be conducted on overhead piping that conveys Section 313 chemicals.

e. For discharges from areas covered by parts 2a, 2b, 2c, or 2d, l, the drainage should be restrained by manually-operated valves or other positive means to prevent the discharge of a spill or excessive leakage, ll. a flapper-type drain valves can not be used for drainage of containment units,

III. 

### the final discharge of in-facility storm sewers should be equipped with a diversion system that could, in the event of an uncontrolled spill of a Section 313 chemical, return the spilled material to the facility, and tv. the records of the frequency and estimated volume (in gallons) of discharges from containment areas will be maintained.

1. 

### Facility site runoff other than from areas covered by parts za, ze, zc, and 2d from which runoff could contain Section 313 chemicals will incorporate the necessary drainage or other control features to prevent discharge of spilled or improperly disposed material and to ensure the reduction of pollutants in runoff or leachate.

g. All areas of the facility will be inspected at specific intervals for leaks or conditions that could lead to discharges of Section 313 water priority chemicals or direct contact of storrnwater with raw materials, intermediate materials, waste materials or products. Inspection intervals shall be specified in the plan and shall be based on design and operations experience. Corrective action will be taken promptly when a leak or condition, which could cause significant releases of a chemical is discovered. If corrective action can't be taken immediately, the unit or process will be shut down until the situation is corrected. When a leak or spill has occurred, the contaminated material(s) must be promptly removed and disposed in accordance with Federal, State, and local requirements and as described in the plan.
h. Facilities will have the necessary security systems to prevent accidental or intentionally entry, which could cause a discharge. Facility employees and contract personnel that work in areas where SARA title III, Section 313 water priority chemicals are used or stored will be trained in and informed of preventive measures at the facility. Employee training shall be conducted at least once per year in the pollution control laws and regulations and in the stormwater prevention plan. The plan shall designate a person who is accountable for spill prevention at the facility and who will set up the necessary spill emergency procedures and reporting requirements. L

### Nyrstar Clarksville, Inc. NPDES PermitTN0029157 Page 29

j. 

### The SWPPP for a facility subject to SARA Title Ill, Section 313 requirements will be reviewed and certified by a responsible corporate officer. The responsible corporate officer will certify the plan every three years thereafter, or as soon as practical, after significant modifications are made to the facility. Certification will in no way relieve the owner or operator of a facility covered by the plan of their duty to prepare and fully implement such plan.
3. "Section 313 water priority chemicals" means the following chemicals or chemical categories:

a. listed at 40 CFR 372.65 pursuant to Section 313 of Title III of the Superfund Amendments and Reauthorization Act (SARA) of 1986, also titled the Emergency Planning and Community Right-to-Know Act of 1986;
b. present at or above threshold levels at a facility subject to SARA Title III, Section 313 reporting requirements; and

c. meeting at least one of the following criteria:

i. listed in Appendix 0 of 40 CFR 122 on either Table II (organic priority pollutants), Table III (certain metals, cyanides, and phenols) or Table V (certain toxic pollutants and hazardous substances); Ii. listed as a hazardous substance pursuant to section 311(b)(2)(A) of the CWA at 40 CFR 116.4; or

III. designated as pollutants for which EPA has published acute or chronic toxicity criteria.
K. STORMWATER SUPPLEMENTAL SWPPP REQUIREMENTS The permittee must complete the Supplemental SWPPP Requirements as presented in Attachment 3.

GMDa
TNOO29157 DOC

### Nyrstar Clarksville, Inc. NPDES Permit TN0029157 Page 30

ATTACHMENT 1 WASTEWATER TREAThlENT FACILITIES INTEGRITY EVALUATION 

### Within eighteen months from the permit's effective date the permittee shall submit to TDEC's Nashville Central and Environmental Field Offices (Division of Solid Waste Management and Division of Water Pollution Control - Permit Section) a report which addresses the structural integrity of any earthen basins associated with its wastewater treatment facilities including any waterborne wastes and sludqe storage/disposal units that are 

### constructed of earthen material. The structural integrity evaluation shall be completed by a professional engineer licensed in the State of Tennessee, an environmental management professional, or other expert who is qualified by education and/or experience to perform and/or oversee such evaluations. The report shall document that the permittee has evaluated the unit's structural integrity and shall include the permittee's planned structural integrity improvements, if warranted. The report shall also address measures implemented and planned by the permittee as appropriate to reduce the chances that said wastewater treatment facilities/units failure would result in an uncontrolled discharge to the receiving stream(s) under normal conditions. Structural integrity evaluations of earthen basins and/or surface impoundments performed for compliance with other requtatory programs (e.g., Hazardous Waste Management under 1200-1-11, Solid Waste Management under 1200-1-7, or the Safe Dams Act) satisfy the 

### provisions of this permit requirement.

### Nyrstar Clarksville, Inc. NPDES Permit TN0029157 Page 31



### ATTACHMENT 2 CHRONIC BIOMONITORING IC25 TESllNG PROCEDURE Pursuant to the IC25 testing requirements presented in Part III.F., the permittee must complete chronic biomonitoring based on the 3-Brood Water Fleas (Ceriodaphnia dubia) 

### survival and reproduction test) and the 7-Day Fathead Minnows (Pimephales promelas) 

### larval survival and growth test using the Crude Zinc Oxide washwater samples. The measured endpoint for toxicity will be the inhibition concentration causing 25% reduction in survival. reproduction and growth (IC 2s ) 

### of the test organisms. The IC 25 

### shall be determined based on a 25% reduction as compared to the controls, and as derived from linear**~nterpolation.** 

### The average reproduction and growth responses will be determined based on the number of Ceriodaphnia dubia 

### or Pimephafes promelas 

### larvae used to initiate the test. This testing must be conducted and its results reported based on appropriate replicates of a total of five serial dilutions and a control, using the percent effluent dilutions as presented in the following table:

100 Treated Effluent Serial Dilutions for Chronic 

### Whole Effluent ToxicilV (WEn Testina 

### % Effluent 

### I 50 

### I 25 

### I 12.5 

### I 6.25 

### I 

## aThe dilution/control water used will be moderately hard water as described in ShortTerm Methods for Estimatina the ChrOniC Toxicity of Effluents and Receiving Water to Freshwater Organisms, EPA-821-R-02-013 (or the most current edition). A chronic standard reference toxicant quality assurance test shall be conducted with each species used in the toxicity tests. Additionally, the analysis of this multi-concentration test shall include review of the concentration-response relationship to ensure that calculated test resurts are interpreted appropriately. Testing must be conducted using a minimum of three 24-hour flow-proportionate composite samples of final effluent collected on days 1, 3 and 5. If, 

### in any control more than 20% of the test organisms die in 7 days, the test (with 100% dilution water) is considered a test control failure and invalid, and the test shall be repealed. Furthermore, if the results do not meet the acceptability criteria in Short-Term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Water to Freshwater Oraanisms, EPA-821-R-02-013 (or the most current edition). or 

### if the required concentration-response review fails to yield a valid relationship per gUidance contained in Method Guidance and Recommendations for Whole Effluent Toxicity (WET) Testina, EPA-821-B-00-004 (or the most current edition), that test shall be repeated. Any test initiated but terminated before completion must also be reported along with a complete explanation for the termination. In the event of a test control failure, the permittee shall start a follow-up test within 2 weeks and submit results from a follow-up test within 30 days from obtaining initial WET testing results. The follow-up test must be conducted using the same serial dilutions as presented in the above serial dilution table. Test procedures, quality assurance practices, determinations of effluent survival/reproduction and survival/growth values, and report formats will be made in accordance

### Nyrstar Clarksville, Inc. NPDES Permit TN00291 57 Page 32


### with Short-Term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Water to Freshwater Organisms, EPA-821-R-02-013, or the most current edition. Results of all tests, reference toxicant information, copies of raw data sheets, statistical analysis and chemical analyses shall be compiled in a report. The report will be written in accordance with Short-Term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Water to Freshwater Organisms, EPA-821-R-02-013, or the most current edition. Three copies of the IC 25 

### biomonitoring reports (including follow-up reports) must be included in the permittee's Form 2C submittal per Part III.F.Nyrstar Clarksville, Inc. NPDES PermitTNQQ29157 Page 33

ATTACHMENT 3 SUPPLEMENTAL STORMWATER POLLUTION PREVENTION PLAN (SWPPP) REQUIREMENTS

The division acknowledges that the benchmark/cutoff values shown in Part 1.A may not provide the best datum for judging stormwater contaminant BMP enhancements needed, given the onsne activities and stormwater controls already implemented. However, until more specific stormwater benchmark/cutoff values have been established, the permittee must use the discharge values included in Part 1.A as the basis for investigating/making further stormwater BMP improvements. As such, the permit requires (he permittee to review/update its SWPPP at least annually. Unless otherwise documented in (he SWPPP as a plan-of-action/with schedule, the division requires the permittee to make BMP enhancements tor reducing stormwater contaminants within 120 days trom submitting the stormwater outfall DMR results for those contaminants exceeding the Part 1.A values. The permittee must document these SWPPP reviews/upgrades, BMP enhancements, and make such documentation available for division review during site inspections. The division may request that the permittee submit a copy of the documentation to the Nashville Environmental Field Office. During the permit term, the permittee may request that the division reopen the permit to include revised benchmark/cutoff values that are specific to its operation given its unique on-site activities, based on justification information provided by the permittee. Generally, the division considers the "first-flush" sample to be the most accurate representation of the maximum daily value for various pollutants in the stormwater runoff. Furthermore. storm water sampling requires the analysis of grab samples collected within the first 30 minutes (or as soon thereafter as practical. but not to exceed one hour) of when the runoff or snowmelt begins discharging, and the discharger must submit with the monitoring report a description of why a grab sample during the first 30 minutes was impracticable. Every effort should be made to collect a "first-flush" sample representative of the daily maximum values for sampled parameters.. If stormwater discharges associated with industrial activity commingle with process or nonprocess water, then where practicable permittees must attempt to sample the stormwater discharge before it mixes with the non-storm water discharge.

A minimum of one grab sample shall be taken. All such samples shall be collected from the discharge resulting from a storm event that is greater than 0.1 inches in magnitude and that occurs at least 72 hours from the previously measurable (greater than 0.1 inch rainfall) storm event. The required 72-hour storm event interval is waived where the preceding measurable storm event did not result in a measurable discharge from the facility. The required 72·hour storm event interval may also be waived where the permittee documents that less than a 72­ hour interval is representative for local storm events during the season when sampling is being conductedNyrstar Clarksville, Inc.(Second Addendum to Rationale) NPDES Permit TN0029157 Page SAD-'


## SECOND ADDENDUM TO RATIONALE

Nyrstar Clarksville. Inc. NPDES PERMIT NO. nl0029157 

### Clarksville. Montgomery County. Tennessee
Permit Writer: Mr. Gary Davis

Pursuant to a December 20. 2011 permittee request the division has made the permit's minor modifications presented in this "Second Addendum to Rationale. The division's responses are provided in italic/bold font.



### Permittee's Requested Permit Attachment 2 Modifications
"The language in Attachment 2 - Chronic Biomonitoring IC25 Testing Procedure is taken from permits in which there is an enforceable IC25 limit; therefore some aspects are not appropriate for Form 2C informational testing. Specifically:

• In the fourth paragraph (after the table), note that results should be submitted with the Form 2C, not ''with the discharge monitoring report".
• In the fifth paragraph, the requirement that repeat testing be completed 

### "within two weeks" should be deleted in 

### two sentences.
• In the sixth paragraph, the last sentence ("The follow-up test shall not negate an initial failed test.") should be deleted:



### Division's Response For The Requested Permit Attachment 

### 2 Modifications



### The division agrees with the request and the changes were 

### made.

Permittee's Requested Permit Attachment 3 Modifications

The permittee requested that the permit Attachment 3's first three paragraphs be replaced with the following requirements:

"The division acknowledges that the benchmark/cutoff values shown in Part 1.A may not provide the best datum for judging stormwater contaminant BMP enhancement needs, given the permittee's on-slte activities. As such, the division will work with the permittee during the next NPDES permit renewal cycle to develop benchmark/cutoff values that are specific to its operation given its unique on-site activities. Toward that end, the permittee must review its SWPPP and stormwater analytical results annually and make appropriate BMP enhancements tor reducing slormwater contaminants. The permittee must document these reviews and BMP enhancements, and make such documentation available for review during site inspections or at other appropriate times. In developing site specific benchmark/cutoff values during the next NPDES permit renewal cycle, the division may choose to compare stormwater analytical data from the preceding permit cycle to historical stormwater analytical data to evaluate

### Nyrstar Clarksville. Inc.(Second Addendum to Rationale) NPDES Permit TN0029157 Page SAD·2

effectiveness of BM? enhancements and adequacy of the data for use in developing sitespecific benchmark/cutoff values for inclusion in future permits."



### Division's Response For The Requested Permit Attachment 

### 3 Modifications

Pursuant to the permittee's request/additional information provided. the permit's Attachment 

### 3 first three paragraphs were revised and consolidated per the clarifications provided subsequently.

Prior to Clarifications:

"If the permittee's discharge value(s) exceed the above new permit's benchmark/cutoff values presented in Part 1.A, the division requires that the permittee complete investigations to determine the reason(s) the higher value(s) occurred and make as needed BMP improvements for the relevant parameter(s). The permittee must document/make effectiveness assessments for such BMP improvements. As a supplemental SWPPP requirement, the permittee must develop. and regularly update 

### a Stormwater Report for its facility.

The division acknowledges that the benchmark/cutoff values shown in Part 1.A may not provide the best datum for judging storm water contaminant BMP enhancement needs, given the permittee's on-site activities. The new permit requires the permittee to submit its first written Stormwater Report to the Nashville Environmental Field Office within 18 months from the permit's effective date with subsequent submittals on an annual basis. The Stormwater Report should include the stormwater results and actions taken, 

### as warranted.

The Stormwater Report should note how the permittee proceeded within 

### 30 days from the time storm water monitoring DMR results were submitted to the division to develop 

### a plan of action to determine the pollutant source/cause of the exceedance and potential remedies for reductions. Furthermore, within 

### 60 days from the time stormwater monitoring DMR results were submitted, the permittee must review and as applicable make modifications to its SWPPP for reducing stormwater contaminants to less than the monitoring benchmark/cutoff values for its facility."

After Clarifications and Consolidation:

"The division acknowledges that the benchmark/cutoff values shown in Part 1.A may not provide the best datum forjudging stormwater contaminant BMP enhancements needed, given the on-site activities and stormwater controls already implemented. However, until more specific stormwater benchmark/cutoff values have been established, the permittee must use the discharge values included in Part 1.A as 

### the basis for investigating/making further stormwater BMP improvements. As such, the permit requires the permittee to review/update its SWPPP at least annually. Unless otherwise documented in the SWPPP as a 

### plan-of-actionlWith schedule, the division requires the permittee to make BMP enhancements for reducing stormwater contaminants within 120 days from submitting the stormwater outfall DMR results for those contaminants exceeding the Part 1.A values. The perminee must document these SWPPPNyrstar Clarksville, Inc.(Second Addendum to Rationale) NPDES Permit TN0029157 Page SAD-3



### reviews/upgrades, BMP enhancements, and make such documentation available for division review during site inspections. The division may request that the permittee submit 

### a copy of the documentation to the Nashville Environmental Field Office. During the permit term, the permittee may request that the division reopen the permit to include revised benchmark/cutoff values that 

### are specific to its operation given its unique onsite activities, based on justification information prOVided by the permittee. "

The Reopener Clause (Part III.B) was revised 

### to include this last sentence. The 

### division does not want the permittee to be forced into continually having 

### to make BMP evaluations/enhancements/documentation, if further stormwater controls 

### are not warranted, nor technically/economically realistic.Nyrstar Clarksville, Inc. (Addendum to Rationale) NPDES Permit TN0029t57 Page AD-1


## ADDENDUM TO RATIONALE

Nyrstar Clarksville. Inc. NPDES PERMIT NO. TN0029157 

### Clarksville. Montgomery County, Tennessee
Permit Writer: Mr. Gary 

### Davis

Draft permit written comments were submitted by the permittee and EPA. This "Addendum to Rationale" provides these comments along with the division's responses (presented in bold 

### italics font), and as such augments the draft permit's "Rationale" and allows the new permit to be finalized,



### Permittee's No.1 Comment

On page 12. does the draft permit require thai both a hard cop.,. and an electronic: cop.,. of our Monthly ocerattng Report be submitted tu the**~iShville** Environmellt;tl Field Office, or will only an electmntc cccv suttrce? We are submitting our monthly**~I'OES** reports via**~etDMf{,** which atlowa for etect-cnk documents to be attached. Will attar-ring our MORs to our monlhlv NelOMR subrnrrta' 1ati1fv this reaUlremenO


### Division's Response to Permittee's No.1 Comment

The division agrees with the permittee attaching its MaR to the monthly NetDMR submittet, with all electronic reporting. However, since the Nashville Environmental Field Office is not setup for NetDMR subminals, the NetDMR with attached MaR must 

### be sUbmitted to the atvtsion's Compliance and Enforcement Office in Nashville.

As such, the permittee will not 

### be required to submit the MaR (hard copy or electronic) to the Nashville Environmental Field Office. Therefore, the following sentence was added to the permit, "The permiNee's electronic DMR submittal must also include as 

### an attachment its Monthly Operating Report (MaR)."

For finalizing the permit the following provision included in the draft permit was deleted from Part I.E. 

### 1: "The permittee shall also submit 

### a copy of its Monthly Operating Report (MOR) 10 

### Ihe division's Nashville Environmenlal Field Office (NEFO). An electronic MaR SUbmittal must aJso 

### be provided to the NEFO." "A copy of the completed and signed DMR shall 

### be mailed to the Nashville Environmental Field Office (EFO) al 

### Ihe following address:
TENNESSEE DEPT. OF ENVIRONMENT & 

### CONSERVATION DIVISION OF WATER POLLUTION CONTROL NASHVILLE ENVIRONMENTAL FIELD OFFICE 711 R.S. GASS BOULEVARD NASHVILLE TN 37243"Nyrstar Clarksville. Inc. (Addendum to Rationale) NPDES Permit TN00291 57 Page AD-2



### Permittee's No.2 Comment

Page 23 includes what appears to be standard municipal wastewater treatment plant permit language requiring wastewater treatment facl\lties tc be operated under the supervision of a wastewater system certified operateand the ccnecucn svstem operated under the supervf5lon of a ccnectron system cernaed operator. This language W3i" not in pre\lious versions of OUf NPDES permit, and our's is ob\liously not II muniLipal svstem. I believe thts language should be removed.



### Division's Response to Permittee's NO.2 Comment

The deparlment requires operator and collection system certifications when the permittee's 

### WWTP also trest« sanitary sewage. Since 

### the permittee treats its sanitary sewage with 

### its on-site treatment system, appropriate certifications are required. However, the division does not specify specific certification reqUirements in NPDES permits. To 

### determine appropriate certifications, the division suggests that the perminee may want 

### to get Information from the Fleming Training Center 

### http://www.tn.gov/environmentHlemingi.

Permittee's No.3 Comment

Page U Jncfuees Janguaae requiring our SWPPP to be certified by a PE everv a years. We ink that the :-ecertif![ilticn requirement be changed to I!wry five yean 10 coincide with the NPDES permit renewal recycle and the SPCC Plan review requirements. 

### Division's Response 

### to Permittee's No.3 Comment

The new permit's SWPPP must 

### be certified every 3 

### years by 

### a permittee's responsible corporate officer rather than 

### a professional engineer. The division does not have 

### regUlatory authority for the permittse's SPCC plan.

EPA's NO.1 Comment

The development of the permit limits for outfall 001 for the following parameters is not adequately explained for the following pollutants: arsenic, cadmium, copper, lead, selenium, zinc, and total suspended solids (TSS).

The draft permit shows calculation of limits using effluent limitation guidelines (ELGs) in the table on page R-22, but the calculations from the tables on page R-23 a(e difficult to follow. 

### It is unclear how the total loadings were established (even with a new table provided by the permit writer. Gary Davis). It is unclear what relationship the zinc probability plot in appendix A-3 has to do with these calculations and how the statistical (95%ile and 99%ile) method is used. It is suggested that a better rationale be provided so one may more easily interpret these tables on page R-22.



### Division's Response 

### to EPA's No.1 Comment

The permittee's physicaVchemical "Metals Recovery Treatment System" (shown in Appendix AD-1, Figure AD-1), treats all the plant's wastestreams, except for the recently ;nstalled Crude Zinc Oxide wash water. Even the dilute wastestreams become

### Nyrstar Clarksville, Inc. (Addendum to Rationale) NPDES PermitTN0029157 Page AD-3



### contaminated since they 

### are comingled with the highly contaminated wastestreams prior to treatment and Outfall 001 discharge. As depicted in Figure AD-1, the permittee's Metals Recovery Treatment System processes numerous contaminated wastestreams associated with ELG and Non-ELG sources.
Based 

### on the flows presented in Table AD-1A, only 16% 

### of the Outfall 001 discharge is due to manufacturing subiect to ELGs. Since all plant wastestreams are combined/treated in the permittee's Metals Recovery Treatment System, the Outfall 001 discharge allocations must be determined based 

### on the ELG and Non-ELG sources. The Best Professional Judgment (BPJ) regulatory process must be used to determine discharge allocations for Non-ELG wastestreams. The resulting OutfaJl 001**techn%gy~** 

### based effluent limits (TBELs) being the mass loading aJlocations for ELG 

### + Non-ELG related plant activities.

Based 

### on the division's further review of the current permit's rationale, permit renewal application information, DMR results, and 

### an on-site evaluation, it was evident that most of the OutfaJl 001 contaminant loading allocations relate to Non-ELG wastestreams sources. To translate this finding into discharge limits the division calculated aJlocations based on the permittee's primary/limiting/controlling discharge parameter, zinc. (The permittee considers zinc control to be the most limiting/difficult wastewater contaminant to treat for achieving the current permit's discharge limits.) As explained in the Rationale (p. R-23), since the permittee uses zinc control as 

### the primary basis for operating its physicaVchemical WWTP, the Outfall 001 DMR zinc results probability plot included in Appendix R-3, provided performance-based discharge values, [monthly average zinc limit =::; 

### 95%tiIe 

### 12.7 Ib/day value (based on DMR monthly averages) and daily maximum zinc limit =::; 

### 99%tile 27.0 Ib/day value (based on DMR daily maximum values)]. These values represent the technology-based total mass loading allocations (sum from ELG and Non-ELG sources) for the facility.

To determine the mass loading discharge allocations 

### for the Non-ELG wastestreams the division assumed that it has two portions 

## tt" portion having treatability "Like ELG" sources and 

### 2'd portion "Not Like-ELG"). It was easy 

### to calculate the "Like-ELG" portion 

### by calculating the ELG concentration and using the Non-ELG flow 

### to determine mass loadings. Since it more complex 

### to explain the "Not Like-ELG" allocation, Table AD-1A was developed with detailed example calculations for the monthly average zinc loading determination. The daily maximum was determined using the same approach. The TBELs for the other discharge parameters was based on the same approach assuming the zinc "Like ELG""100INot Like-ELG" value was applicable. The division realizes that some BPJ determination adjustments could be warranted for the next permit renewal. Using this approach the TBELs presented in Table AD-1 

### B were determined.



### EPA's No.2 Comment

The rationale for allowing backsliding of the parameters listed above has not been adequately documented. The limits for outfall 001 are less stringent than the previous permit. It is recommended that adequate justification be included for the increase of limits.

### Nyrstar Clarksville, Inc. {Addendum to Rationale) NPDES Permit TN0029157 Page AD-4



### Division's Response to EPA's No.2 Comment

An antibacksliding exception can occur if the permittee's facility is sUbject to a material and substantial alteration. For example, this antibacksliding exception can 

### be applied when the discharge limits are increased due to changes in production and/or the industry is subject to corrections due to production-based ELGslBPJ determinations. Also, an antibacksliding exception exists for renewals involving technical errors! misunderstanding related to developing the discharge limits for prior permits.

The receiving stream is fully supporting its designated uses and the new permit's discharge values are consistent with retaining instream water quality requirements. The new discharge limits were based 

### on additional site infonnation, furlher division insight regarding the permittee's WWTP's operation/perlormance and 

## a revised BPJ determination (using the Building Blocks approach instead of the Combined Wastestream Formula). In its permit renewal application the permittee noted that as of 2010 it had re-acquirec/ and is in the process of reopening mines in Tennessee, and is installing a crude zinc oxide washing process for providing a supplemental raw material source.

EPA's NO.3 Comment

The Company had calculated proposed limitations and included this information in the application; yet larger loading limits (as calculated 

### by the State) have been included in the permit (for outfall 001); justification for this has not been given.

In the application package submitted by the Nyrstar in May 2010, there were calculations which the Company proposed which are contain slightly elevated loading limits tor outfall 001 for pollutants in the previous permit. The calculations provided by the Company were easy to interpret. The loadings calculated by the Company were more stringent than those proposed in the draft permit. It is unclear why the larger proposed draft limits were established, instead of those presented by the applicant.
For example -for monthly average amounts (in pounds per day)

Pollutant

Arsenic Cadmium CODDer Lead Selenium Zinc 

### TSS Previous permit limit

13.77 1.76 14.10 2.93 11.02 10.68 1876 Proposed limits by Company as shown with aoolication (Table 3\ Draft permit limit I



### 17.12 13.97 1.77 2.28 14.21 17.43 2.95 3.72 11.02 24.9 10.76 12.0 1943.65 2459 

# ----.J

### Nyrstar Clarksville, Inc. (Addendum to Rationale) NPDES Permit TN0029157 Page AD-5



### Division's Response to EPA's No.3 Comment

As explained in the division's response to EPA comments Nos. 

### 1 and 

### 2, the new discharge limits were based on 

### additional site information. further division insight regarding the permittee's WWTP's operation/perlonnance. and 

### a revised BPJ determination. The new permit's technology-based discharge allocations were developed using the "Building Blocks" approach instead of the "Combined Wastestream Formula". The "Combined Wastestream Formula" is used 

### for pretreatment discharge allocation determinations. Also, the current pennit's technology-based discharge allocations and the permittee's proposed technology-based were formulated using prior division criteria (Rule 120CJ.4-5-.03 for "Unregulated, Non-Process Related Wastestreams") Which is no longer applicable. The technology-based limits must 

### be developed per Rule 1200-4-5-.09 which involves ELG + 

### BPJ (for applicable Non-ELG plant processes). The new permit discharge selenium limits were based on the division's water quality reasonable potential evaluation involving an increased low-flow determination. as 

### shown in the Rationale (pp. R·30 and R-32).

EPA's No.4 Comment

The use of a 90% stream allocation instead of 50% stream allocation that 

### was used in the water quality based calculations has not been adequately justified. The current method that the State uses in the calculation of reasonable potential procedures (RPA) Includes a margin of safety. Generally a 90% margin of safety is used for "wadeable" streams and 50% is used tor "non- wadeable streams." The Cumberland River would be classified as "non-wadeable" yet the margin of safety used is 

### 90%. Based on April 

### 26, 2011. correspondence from the Company, it was requested that 90% allocation be retained. The Company noted that use of the 50% margin of safety would ultimately have the effect of reducing the metals, particularly cadmium and selenium and would cause undue hardship to Nyrstar is more stringent limits were included in the permit (including the possibility of plant closure). Such undue hardship should not be considered an appropriate rationale to retain the margin of safety at 901;>/0. The rationale in the permit notes on page R·2. Section R3.2.b., that "(T]he 

### 90% receiving stream water quality allocation from the permittee's current permit has been retained." The last sentence of this seclion states: "Since water quality allocation are related to the types and number of dischargers, the specific allocation will be defined with each permit renewal." The rationale does not provide adequate justification as to why a 

### 90% allocation should be allowed for this particular discharge and the EPA recommends that justification be provided.
As a side-note, the Company had noted that there was only one sampling point for selenium and the default value used in the RPA made selenium very restrictive. The Company and the State should explore doing multiple in-stream sampling of metals (especially selenium) above the discharge to provide better data for the next issuance of the permit.



### Division's Response 

### to EPA's No.4 Comment

The reasonable potential procedures are not promulgated regulation, therefore the division has flexibility regarding the discharge allocation for treated effluent

### Nyrslar Clarksville. Inc. (Addendum to Rationale) NPDES Permit TN0029157 Page AD-6



### contaminants. Since the 

### Crude Zinc Oxide (CZO) is B 

### new process facility, the division requires per 

### the new permit's Part III.F., that the CZO washwater contaminant loadings must 

### be characterized per Form 2C 

### and IC25 testing. Based on this additional 

### wBshwater characterization Information 

### the division may reopen the permit 

### to require supplementa' WQBEL determination information, which could involve requirements that the permittee identify metals of concern in 

### the Cumberland River upstream of the 

### Clarksville STP (TNOO20656) and permittee's discharges.



### EPA's No.5 Comment

It is noted 

### that stormwater is 

### being limited for cadmium, copper, lead, zinc, and TSS for outfalls SW3, SW4, and SW5, but no reasonable potential analysis has been included to 

### ensure these are the appropriate limits for these outfalls; this justification should 

### be included.

The EPA appreciates the fact that limitations are being placed on these stormwater discharges that had no limits in the previous permit, but recommends that justification be included that water quality will be adequately protected with the limits as given.



### Division's Response to 

### EPA's No.5 Comment

The numerical values for the stormwater Outfall SW3, SW4 and SWS discharges are 

### actuallY benchmark/cutoff values and not effluent limitations. As 

### such, reasonable potential analyses are 

### not warranted for the permit renewal; however, as 

### described in the Rationale p. R-4 [If" 

### the permittee's discharge exceeds the above new permit's benchmark concentration the division requires that the permittee complete investigations to determine the reason(s) the higher value(s) occurred and make as 

### needed BMP improvements for the relevant parameter(s). The permittee must document/make effectiveness assessments for such BMP improvements. 

## "J. This approach provides 

### a mechanism for the permittee to make stormwater quality improvements. 

### The new pennit was finalized to include the draft permit's intended reqUirements for conditions where the stonnwater benchmark/cutoff values are 

### exceed by adding the Anachment 3 

### clarifications pursuant to the newly referenced Part V. K.

The new permit's Anachment 

### 3 includes the following provisions: "If 

### the perminee's discharge value(s) exceed the above new permit's benchmark/cutoff values presented in Part 1.A. the division requires that the permittee complete investigations to 

### determine the reason(s) the higher value(s) occurred and make as 

### needed BMP improvements for the relevant parameter(s). The permittee must document/make effectiveness assessments for such BMP improvements. As 

### a supplemental SWPPP reqUirement, the permtttee must develop, and regularly update 

### a Stormwater Report for its facility.

The division acknowledges that the benchmark/cutoff values shown in Part 1.A may not provide the best datum for judging stonnwater contaminant BMP enhancement needs, given the permittee's on-site activities. The new permit reqUires the perminee to submit its first wrinen Stormwater Report to the Nashville Environmental Field Office within 18 months from the permit's effective date with subsequent submittals on an annual basis.

### Nyrstar Clarksville, Inc. (Addendum to Rationale) NPDES Permit TN0029157 Page AD-7



### The Storm water Report should include the storm water results and actions taken, as 

### warranted.

The Storm water Report should note how the permiNee proceeded within 30 

### days from the time stormwater monitoring DMR results were submitted to the division to develop 

### a plan of action to determine the pollutant source/cause of the exoeeaenc« and potential remedies for reductions. Furthermore, within 

### 60 days from the time stormwater monitoring DMR results were submitted, the permiNee must review and as applicable make modifications to its SWPPP for reducing stormwater contaminants to less than the monitoring benchmark/cutoff values for its facility."

The new permit's Attachment 

### 3, provides stormwater monitoring clarifications.

EPA's No.6 Comment

The draft permit does not include monitoring for a stormwater outfall, SW6, but pollutants are being discharged from this site. This outfall needs to include monitoring <at the very least).
The previous permit contained monitoring requirements for flow, pH, T55, total cadmium, total copper, total lead, and total zinc. The draft permit contains no monitoring, although it does acknowledge the outfall 5W6 on the cover page. The applicant has also noted the existence of outfall 5W6. The rationale should present documenlation that RPA has been done, and if no water quality limits are needed, then monitoring of pollutants as previously done should be included (at a minimum on an annual basis).



### Division's Response to EPA's No.6 Comment

The DMR results for the permittee's stormwater outfall discharges are provided in the Rationale p. R-20. The division is aware that some Outfall SW6 parameters exceed the cutoff concentrations (maybe due to historical activity or 

### fugitive emissions); however, since the permittee has indicated that the Outfall SW6 hasn't had industrial actiVity for the past several years the new permit has been 

### finalized without monitoring requirements. As such, the following provision was added to the reopener clause Part JIJ.B "The permittee must notify the division if during the term of the permit the Outfall SW6 discharge becomes SUbject to runotf from active industrial ectivitv, and the division may reopen the permit to add monitoring/BMP upgrade requirements pursuant to benchmark/cutoff values." Updated Outfall SW6 stormwater characterization data wiJJ be provided to the division with the permiNee's next Form 2F 

### permit renewal submittal, at 

### which time the division wiJJ decide if Outfall SW6 monitoring is warranted.

For the new permit, the division wants the permittee to focus on 

### the OutfaJl SW3, SW4 and SW5 discharges wherein the stormwater contaminants are much higher than the benchmark/cutoff values and further evaluations are warranted.

EPA's No.7 Comment

It is recommended that outfall 001 contain whole effluent toxicity (WEn testing.Nyrstar Clarksville, Inc. (Addendum to Rationale) NPDES Permit TN0029157 Page AD·S



### To ensure that the effluent is not toxic from the synergistic effects of the various metals being discharged to the Cumberland River, and due to the new crude zinc oxide washing facility that has been installed, 

### it is recommended that WET testing be included in the permit (at a minimal frequency of one per year for the life of the permit).



### Division's Response to EPA'$ No.7 Comment

The permittee's current permit Rationale p. R-11 indicates "Since the calculated dilution 

### factor is greater than 500: 

### 1 for this facility discharge and its receiving stream, biomonitoring will not 

### be required during this permit cycle

. .. This provision is applicable for the new permit. Also, as beckground information the permittee had conducted biomonitoring Outfall 001 discharge evaluations in 

### 1999 with the following results: 

### 96 hr LC50 acute 

### = 96% 

### Ceriodaphnia dubia and >100 

### % for Pimephales promelas, and IC25 chronic 

### = 14% 

### for Ceriodaphnia dubia and 54% 

### for Pimephales promelas. Based on the Appendix R·l (p. R-12) Outfall 001 discharge and receiving stream 

### flow data the instream waste concentration OWC) is 0.04%. Therefore, even with changes in manufacturing and WWTP upgrades, the division does not expect WET water quality problems associated with the Outfall 001 discharge.
Since no WET results exist for the washwater from the new crude zinc oxide washing operation, the permittee must include the IC25 testing results with its Form 2C 

### application submittal pursuant to the new permit's Part III.F. 

### The new permit's Part III.F. includes the following requirement: "The submittal must also include the IC25 testing results, pursuant to the procedure presented in Attachment 

### 2." 

### The new permit's Attachment 

### 2 includes the requirements for completing the IC25 testing.

EPA's No.8 Comment

Additional justification should 

### be included for the "de minimus" antidegradation determination for chloride and fluoride from the new process (crude zinc oxide washing 

### facility).

The table as found in appendix R-5 shows the "de minimus" calculations for chlorides and fluorides due to the new process, but the rationale lacks a narrative of why this is considered "de minimus" in light of Tennessee's regulations.



### Division's Response fa 

### EPA's No. 

### B Comment

From the permit's Rationale (p. R·10) "As shown in Appendix R-5 and discussed in Section RB, the additional chloride and fluoride loadings in the washwater from the permittee's newly-installed Crude Zinc Oxide (CZO) facility presents 

### a de minimis impact, since these parameters 

### use less than five percent of the receiving stream's available assimilative capacity. OJ 

### Tennessee's antidegradation (per Chapter 1200.4·3·.06.) and new permit's Part I.C. Definitions, "De Minimis

- Alterations, other than those resulting in the condition of pollution or new domestic wastewater discharges, that represent either 

### a small magnitude or 

### a short duration shall 

### be considered 

### a de minimis impact and will not 

### be considered degradation for purposes of implementing the antidegradation policy. Discharges other than domestic wastewater will 

### be considered

### Nyrslar Clarksville, Inc. (Addendum to Rationale) NPDES Permit TN0029157 Page AD-9



### de minimiS 

### if 

### they are temporary or use less than five percent of the available assimilative capacity for the substance being discharged. If more than one activity has been authorized in a segment and the total of the impacts uses no more than ten percent of the assimilative capacity, available habitat, or 7010 low flow, they are presumed to 

### be de minimis. Where total impacts use more than 

### ten percent of the assimilative capacity. Bvailable habitat, 

### or 7010 low flow they may be treated 

### as de minimis provided that the 

### division finds 

### on a scientific basis that the additional degradation has 

### an insignificant effect on the resource and that 

### no single 

### actiVity is alloWed to consume more than five 

### percent of the assimilative capacity. available habitat or 7010 low flow." Note, underlined portion of de minimis definition added for clarification regarding the division's "de minimis" determination.

### Nyrstar Clarksville, Inc. (Addendum to Rationale) NPDES Permit TN0029157 Page AD·10 APPENDIX AD·' Fiaure AD·1



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### - - Nyrstar Clarksville, Inc. (Addendum to Rationale) NPDES Permit TNDD29157 Page AD-11

Table AD-1A

TECHNOLOGY-BASEO OUTFALL 001 ZINC**OlSC~ARGE** ALLOCA TlONS

EFFLUENT MonUl Avera _ CHARACTERISTIC ELG Wastestreams Non-ELG Wastestreams Total Allocation LoadlOg 

## Fk'" CDOC 

### 'ow BPJ Basis a Loading ,EL:;) IELGI fELG) (Non-ELG) Like-ELG b Not LI'K<:·ELG tc rotar (95 %tlle VaIU8)**It>cla~1** 1m, d ImnJL [mod (Ib'clavl 1b.(1avl tb'oev (Ibid.:!y\ ll1'lC(T, 1.478 00727 

# " 03832 77BS 2.734 10 522 12.0

EFFLUENT Oaily Mbimum CHARACTERISTIC ELG Wastntreams Non-ELG Process W8stutreams**lotaIAII~~** , oadll'lg Gone Flow L_ BPJ BaSIS a Loadings 

# "ow**,~ELGI** (ElG)**(t~ofl.ElC,tLl'K,".HG** b No!**LI~e-ElG** (e) Total IElGi (99 %!Ile Value) !m')ljj' IIbditv) Ib,'clay) I (It)'d8.v\ tmcoi met (lb'rjaVI lb-cIaV Zlt';C(T) 3,590 007Z7 '59 (11832 18.917 

# 44. 23410


# - 21.0
0**,~)** , errrvrtee use s lITlC treatment performance as onrnarv ba ,1"

- for operating VWVTP W) carcoateo USing**c:...'~** concemauon ami Non·I::LG wastcaneems now iCi '':'';',\'TP zmc Ireillmer,l oerrorroarce veloes for calUILaI,rlg "Like E;"03'& "Not "KE ELG" 

### asocenors ')c,1° o lor MonthIy Averag o'> :') 8 "e Ior Oa,l; Maximum**'~he** above oerceraeces useoto cecueie**"I~ol ;"1~e·ELG**  allocations lor clher Oonen 001 parameters i ,,0110' Be-a r'roressrorai Judgment IBPJ) mass loadlrlg allocations developed**(on~\derlrlg** permittee's prcces s**~nc)wled9€** wastesaeam cnaractensncs eoo lreatmenl system pencrrnance ilS felaled to rocreesec flow from ocn.Et.c wa-resnearns i1f\(lude raTlllan)
IMonthly Average Example:

'BEL ncr- ten.scale trealabltity**TesU~S** 95%(ile value -

__ -,'"'e.Ollb lInc;oay based on DMR results

AIIQ\:,nCJll nom E**~G** :;: 1 478 Ib zmoday Aucceuon Irorr'LlkeELG ::**f--_-f7~7~8~8** Ib zmooav Tali'll-=

## ~==.~.~"~'~ Ib zmouev AII0ca::0n rrorut.ot L1ke-cLG'

7738 Ib zmcoav for "Like ELG" 

## \-_-c"",7J.4 b zmc'cavftx "Not llke-ELG'" 10.522 Ib zmrdaj lor Non ELG Tolal =

2734"10077BB 35.1 "0Nyrstar Clarksville, Inc. (Addendum to Rationale) 

### NPDES Permit TN0029157 Page AD-12

Table AD-1B

TECHNOlOGY-SASED OUlFAllOO1 DISCHARGE ALLOCAl1ONS
Mon1h1y Averlot EFFLUENT Total Allocation Non..ElG W,steltreams ELG Was1estl'eams CHARACTERISTIC Loading BPJ Basis a FkJw Loading Flow Cone Total Like tLG Ib Not Like-ELG c

### I~";;G)**(l\da~** h'da 

# It",.,) IllJIdavl lmadl ImaiLl IJlda' 1712 390 15014 11113 03832 00727 

### 35 2109 ARSENIC 228 1.461 052 2000 03832 0281 00727 05 CADMIUM 1743 11.313 397 15285 35 03832 COPPER 2147 00727 372 2413 085 3261 00727 08 03832 LEAD 0.458 245 158980 5581 214790 03832 SELENUM n 30171 0.0727 497 17M 2734 10522 120 03832 1.478 0.0727 24**~NC** 1 596 560 2156 2459 03832 TSS 303 00727 499
Daily Muinum EFFLUENT Total Allocation CHARACTERISTIC ElG Wastestreams Non..ElG Procea Wastestreams Lce dHJ;l5 Loa.,,", 

### Row Cone 

### Row BPJ Basis/a Like ELG bl NOILlke-ELG/c (NooHG) Total lmad) Iml I lmadl lIb/davl Ib!dav\ lbIdav) I"dayl Illbida' 34**4~,** ARSENIC 

### :n 4 :080 00727 76 03832 24133 573 29866 CADMIUMm 0703 00727 12 03832 3704 068 4584 529 COPPERm 00727 74 3387 4504 03832 23733 564 29370 00727 i 

## e 03832 741 LEAD 0985 5190 123 6423 SELENIUM m 60342 00727 995 03332 317961 7552 

### 1-- 393484 454 nNC 00727 59 03832 18917 449 23410 3590 270 TSS 606 00727 999 03832 3192 756 3950 4555 (al Penmee uses line ueauren petomarce as pnmarv baSIS for operannq IfII\VTP (b) CalaJlaled lISlng ELG corcemanct and Noo-ElG easesreams flow (c) "Not**Like-ELG~** allocaborrs oeterrmed assuming that !he follovring zinc perCl?llIagl?S ("Nollike-ElG" '1 OOrUe El G") are applicable. 35 1 %for**Mo~ A~age**  238 % lor Daily MaxmllJn Note 

### Best Professional Judgment (BPJ) mass loading allocahons developed COflSlderrrrg penntee's process knoWledge. wastestream 

### ceacetscs ard**lIea~** 

### system pertorrrarce as related 10 mcreasec flow from rKIll-ELG wastesnearrs (irdl.de rainal) The draft. perrm's ElGs "Cone cacuanors meWed a 1ypO, "9 34" msead of "834" Above cakuanons correcteoNyrstar Clarksville, Inc. (Addendum to Rationale) NPDES PermitTN0029157 Page AD-13

APPENDIX AD·2 SUPPLEMENTAL SWPPP REQUIREMENTS (FROM PERMIT'S ATTACHMENT 3)

If the permittee's discharge value(s) exceed the above new permit's benchmark/cutoff values presented In Part 1.A, the division requires that the permittee complete investigations to determine the reason(s) the higher valuers) occurred and make as needed BMP improvements for the relevant parameter(s). The permittee must document/make effectiveness assessments for such BMP improvements. As a supplemental SWPPP requirement, the permittee must develop, and regularly update a Stormwater Report for its facility.

The division acknowledges that the benchmark/cutoff values shown in Part 1.A may not provide the best datum for judging storm water contaminant BMP enhancement needs, given the permittee's on-site activities. The new permit requires the permittee to submit its first written Storm water Report to the Nashville Environmental Field Office within 18 months from the permit's effective date with subsequent submittals on an annual basis. The Stormwater Report should include the stormwater results and actions taken. as warranted.

The Stormwater Report should note how the permittee proceeded within 30 days from the time stormwater monitoring DMR results were submitted to the division to develop a plan of action to determine the pollutant source/cause of the exceedance and potential remedies for reductions. Furthermore, within 60 days from the time stormwater monitoring DMR results were submitted, the permittee must review and as applicable make modifications to its SWPPP for reducing storm water contaminants to Jess than the monitoring benchmark/cutoff values for its facility. Generally, the division considers the "first-flush" sample to be the most accurate representation of the maximum daily value for various pollutants in the stormwater runoff. Furthermore, stormwater sampling requires the analysis of grab samples collected within the first 30 minutes (or as soon thereafter as practical, but not to exceed one hour) of when the runoff or snowmelt begins discharging, and the discharger must submit with the monitoring report a description of why a grab sample during the first 30 minutes was impracticable. Every effort should be made to collect a "first-flush" sample representative of the daily maximum values for sampled parameters. If stormwater discharges associated with industrial activity commingle with process or nonprocess water. then where practicable permittees must attempt to sample the stormwater discharge before it mixes with the non-stormwater discharge.

A minimum of one grab sample shall be taken. All such samples shall be collected from the discharge resulting from a storm event that is greater than 0.1 inches in magnitude and that occurs at least 72 hours from the previously measurable (greater than 0.1 inch rainfall) storm event. The required 72-hour storm event Interval is waived where the preceding measurable storm event did not result in a measurable discharge from the facility. The required 72-hour storm event interval may also be waived where the permittee documents that less than a 72­ hour interval is representative for local storm events during the season when sampling is being conductedNyrstar Clarksville, Inc. (Rationale) 

### NPDES Permit TN0029157 Page R-1



## RATIONALE

Nyrstar Clarksville, Inc. NPDES PERMIT NO. TN0029157 Clarksville. Montgomery County. Tennessee
Permit Writer: Mr. Gary Davis 

### R1. DISCHARGER Nyrstar Clarksville, Inc. 1800 Zinc Plant Road Clarksville, Montgomery County, Tennessee 

### Site Longitude: -87.416667 Site Latitude: 36.530556
Official Contact Person: Mr. Kevin Cook Environmental Superintendent 

### (931) 552-4200

Nature of Business: Production of zinc metal from the beneficiation of zinc concentrate ore and oxide washing by hydrometallurglcal processes; production of coproduct cadmium metal, sulfuric acid and 

### metalluraically yaluable by-products.

SIC Code(s): 1031 Industrial Classification: Primary 

### Discharaer Ratina: Maior PRIMARY INDUSTRY CATEGORY means any indust'Y cateqory listed In the NRDC Settlement Agreement (Natural Resources Defense Council v. Train, 8 ERC 2120 [DD.C. 1976], modified 12 ERC 1833IDD.C. 1979]).


### R2. CURRENT PERMIT STATUS

Effective: June 1, 2006 Expired: November 30, 2010 (a) Application for renewal received May 28, 2010 (a) Administratively extended with complete permit renewal 

### application. Watershed Scheduling

Environmental Field Office: Nashville 

### Outfall 001 LongitUde: -87.41602 latitude: 36.51781 Hydrocode:5130205 Watershed Group: 5 Watershed Identification: Cumberland-lower-Barkley Lake Tarael Relssuance Year: 2015

### Nyrstar Clarksville, Inc. (Rationale) NPDES Permit TN0029157 Page R-2

R3. PERMIT RENEWAL CONSIDERATIONS

1. The permittee requested in its permit renewal application that the new permit be developed excluding monitoring requirements 10r Outfall SW6, since no industrial activity has occurred 10r several years and low discharge contaminant concentrations have been monitored. As noted in Section R6 the division concurs with the permittee's request and Outfall SW6 monitoring requirements will be included in future permits if warranted based on subsequent permit renewal Form 2F results.

2. The new permit includes the following additional requirements:

a. As described in Section R12, a wastewater treatment earthen basins integrity evaluation is included as a new permit requirement.

b. The 90%, receiving stream water quality allocation from the permittee's current permit has been retained for the new permit. However, based on division policy for non-wadeable receiving streams the division frequently uses an allocation up to 50% of the water quality criteria for individual dischargers. Since water quality allocations are related to the types and number of dischargers, the specific allocation will be defined with each permit renewal.

c. Applicable technology-based Outfall 001 discharge mass loadings for process wastestreams were determined based on relevant EPA Effluent Limitations Guidelines (ELGs). For process and dilute wastestreams nol subject to ELGs, Best Professional Judgment (BPJ) assessments were completed to determine applicable Outfall 001 discharge mass loading allocations pursuant to the criteria presented in Section R7 and Appendix R-4. The new permit requires the permittee to also submit its Monthly Operating Reports (MOR), which will be useful for BPJ determinations lor subsequent permit renewals.

e. As noted in Section R9, updated TMSP "Cutoff/Benchmark" discharge values were included in the new permit. The Cutoff/Benchmark" discharge values are to be used for determining the effectiveness of BMPs and are not actually discharge permit limits.

f. 

### The permittee's new crude zinc oxide 

### (ClO) washing facility discharge's contaminant loadings were determined based on BPJ evaluations, which translated to a de minimis 

### water quality impact on the receiving stream. This is discussed in Sections RS, R9, R10 and Appendix R-5. The new 

### ClO facility resulted in additional Outfall 001 treated effluent monitoring parameters (total dissolved solids, conductivity, chlorides, and fluorides) being included in the new permit. Also, the new permit includes monitoring requirements for the CZO washwater, using a new monitoring location (Internal Outfall 01A).

R4. PERMITTEE'S OUTFALLS, TREATMENT SYSTEM, AND RECEIVING STREAMS The permittee discharges treated process wastewater, sanitary wastewater, stormwater and cooling water through Outfall 001 to the Cumberland River at mile 1.22.**I~ternal** 

### Outfall 0.1 A results will be used for monitoring the CZO washwater. Demineralized reqeneration

### Nyrstar Clarksville, Inc. (Rationale) NPDES Permit TN00291 57 Page R-3

wastewater, water plant overflow and filter backwash is discharged via Outfall 002 to an unnamed tributary to Cumberland River at mile 122.6. Stormwater runoff subject to industrial activity and cooling water discharges through Outfalls SW3 and SW5 to the Cumberland River at mile 

### 121.1 via an unnamed tributary. Stormwater runoff from Outfalls SW4 and SW5 drains 

### to an unnamed tributary then to the Cumberland River at mile 122.6. Appendix R-1 presents the permittee's discharges. receiving streams information, and a schematic diagram of the permittee's physical/chemical wastewater treatment plant. The permittee recently installed crude zinc oxide wash facility includes pH adjustment, precipitation, polymer addition and sedimentation control systems.
RS. CURRENT PERMIT LIMITS AND MONITORING REQUIREMENTS Appendix R-2 presents the permittee's current permit discharge requirements. R6. DISCHARGE MONITORING REPORT (DMR) AND INSPECTION RESULTS The permittee's Discharge Monitoring Report (DMR) results for the current permit are provided in Appendix R-3. These results demonstrate that the permittee did not have any appreciable difficulty in achieving its current permit's treated effluent discharge limits monitoriing requirements. The permittee indicated that the Outfall SW6 discharge no longer receives stormwater subject to industrial activity and requests that no monitoring be required for the new permit. As shown in Appendix R-3, the Outfall SW6 discharge contaminants (which might be from past activities or fugitive emissions) are much lower concentrations than those for Outfall SW5. As such, Outfall SW6 monitoring pursuant to the new permit will not be required. However, the permittee must include a completed Form 2F for Outfall SW6 with its next permit application. Division personnel from the Nashville Environmental Field Office performed a recent Compliance Evaluation Inspection (CEI) for the Nyrstar Clarksville, Inc. facility on February 15, 2011. The inspection report noted minor deficiencies.

R7. TECHNOLOGY- BASED EFFLUENT LIMITATIONS Technology-based effluent limitations are applicable to wastestreams subject to the federal Effluent Limitation Guidelines (ELGs) and for those which ELGs do not exist, the division uses Best Professional Judgment (BPJ) for treatment performance-based discharge allocations. As presented in Appendix R-4, this approach was used for developing the new permit's technology-based discharge requirements/allocations. The October 4, 2000 document "Chronology of Effluent Limitation Guidelines for Metallurgical Acid Plants", developed as background information for permit renewals is available in the permit file. The permittee's SIC code is 1031 (Lead and Zinc Ores). Process wastewater discharged through Outfall 001 is regulated by 40 CFR Part 421 - Nonferrous Metals Manufacturing Point Source Category and applicable ELGs and mass loadings discharge allocations for various wastewater contaminants subject to Subpart H - Primary Zinc SUbcategory and SUbpart I - Metallurgical Acid Plants, are provided in Appendix R-4. Appendix R-4 also presents the BPJ rationale for technology-based discharge allocations for the permittee's non-ELG wastestreams. The BPJ determinations were based on contaminants considered present and were derived from process knowledge, treatment

### Nyrstar Clarksville, Inc. (Rationale) NPDES PermitTN0029157 Page R-4

performance results/treatability information, and the permittee's primary treatment focus on zinc control.

RB. WATER QUALITY CONSIDERATIONS
Appendix R-5 presents water quality evaluations/calculations for determining discharge permit requirements based on the division's reasonable potential approach. The water quality calculations provided in Appendix R-5 are specifically focused on water quality requirements related to heavy metals and toxic organics. The water quality calculations for the permittee's washwater trorn its recently-installed Crude Zinc Oxide (CZO) washing facility are also presented in Appendix R-5. The permittee has indicated to the division that its washwater discharge presents a 

### de minimis loading on the receiving stream (as evident by calculations provided in Appendix R-5). The permittee is currently investigating testing several CZO source materials to determine which ones are acceptable for its manufacturing purposes. As such, the new permit's reopener clause has provisions for modttication if warranted based on CZO washwater characteristics.

R9. NEW PERMIT LIMITS AND MONITORING REQUIREMENTS

The proposed new permit limits have been established by determining a technologybased limit and evaluating if that limit protects the receiving stream's water quality. If the technology-based limit would cause water quality violationts) the new permit includes the more stringent water quality-based discharge limit. The technology-based limits were determined from EPA effluent limitations guidelines as applicable; or from State of Tennessee maximum effluent limits for effluent limited segments per Rule 1200A-5-.0B; or by way of operational and/or treatability data pursuant to BPJs. Furthermore. effluent limitations in this permit must comply with any approved Total Maximum Daily Load (TMDL) studies. Appendix R-B lists all proposed effluent limitations and monitoring requirements to be included in the new permit. Note that In 

### general, the term "anti-backsliding" refers to statutory provisions that prohibits as applicable, the renewal, reissuance, or modification of an existing NPDES permit that contains effluents limits, permit conditions, or standards that are less stringent than those established in the current permit. The rationale for including discharge parameter limits and monitoring requirements in the new permit for the permittee's various outtalls are presented SUbsequently, pursuant to the followings outtalls:

• Outfall 001
• Internal Outfall 01A
• Outtal' 002
• Outtalls SW3. and SW4. and Outtall SW5

Outfall 001 Discharge Parameters



### Flow - Outlall 001Nyrstar Clarksville, Inc. (Rationale) NPOES Permit TN0029157 Page R-5

Flow monitoring allows the mass loadings for discharged contaminants to be calculated. Flow must be reported in Million Gallons per Day (MGO) and monitored continuously using a 

### recorder.
pH - Durtall 001 According to the State of Tennessee Water Quality Standards [Chapter 1200-4-3-.03(3) (b)1, the pH for the protection of Fish and Aquatic Life for large rivers shall lie within the range of 

### 6.5 

### to 9,0 and shall not fluctuate more than 1.0 unit in this range over a period of 24 hours. Based on the size of the discharge and the available buffering capacity, a discharge pH of**6.0~** 9.0 is considered to comply with the standard. The sample type will be grab, measured at a frequency of once per week (1/week).

Total Suspended Solids (TSSI - Durtall 001 Total Suspended Solids (TSS) is a general indicator of the wastewater quality and will be limited in the new permit. The new permit includes technology-based TSS discharge limitations (monthly average and daily maximum amount limits of 2,459 Ib/day and 4,555 Ib/day, respectively)
The State of Tennessee Water Quality Standards tor the protection of Fish & Aquatic Lite [Chapter 1200-4-3-.03(3) (c)] state there shall be no distinctly visible solids, scum, toam, oily slick, or the formation of slimes, bottom deposits or sludge banks of such size or character that may be detrimental to fish and aquatic life in the receiving stream. Considering the nature of wastewater collection and discharge system the sample type will be composite, measured at a frequency of once every two months (1/2 months).

Heavv Metals - Curtail 001

The new permit includes discharge mass loading monthly average and daily maximum limits for arsenic, cadmium, copper, lead, selenium, and zinc. The discharge limits for arsenic, cadmium, copper, lead and zinc were determined based technology-based effluent limitations. The selenium discharge limits were based on water quality criteria.

Escherichia coli IE. call) - DuHall 001 Although sanitary wastestreams are included in the permittee's Outfall 001 discharge as noted in the current permit, 

### E. coli limitations/monitoring are not warranted, because the division considers the acidic value and hydraunc retention time afforded by the permittee's treatment pond(s) to be adequate for disinfection.Nyrstar Clarksvilte, Inc. (Rationale) NPDES Permit TN0029157 Page R-B

LC50 and IC25 - Outfall 001
Since the receiving stream to Outfall 001 discharge flow ratio is greater than 500: 1, the division has determined that biomonitoring limitations/monitoring will not be required during this permit cycle. Conductivity, Total Dissolved Solids, Chlorides and Fluorides - Outfall 001

The new permit includes weekly treated wastewater monitoring based on composited samples for conductivity, total dissolved solids, and chlorides. The Outfall 001 effluent fluorides must be monitored on a monthly basis.


### Internal Outfall 01 

### A Parameters

The follOWing Internal Outfall 01A monitoring requirements were included in the new permit due the permittee's recently-installed crude zinc oxide (CZO) washing system and the division's need to collect its washwater characteristics to insure that applicable discharge requirements are included in the permit.

Flow -Internal Outfall 01A

The permittee must measure and report its CZO washwater flow (in units MGD). Flow values will be used to calculate contaminant loadings trorn the washwater. pH - Internal Outfall 01A

The CZO washwatar pH must be monitored and reported based on grab samples.

Total Suspended Solids jTSS\ -Internal Outfall 01A**Wee~ly,** grab Internal Outfall 01A washwater samples must be monitored for TSS. Conductivity, Total Dissolved Solids. Chlorides and Fluorides -Internal Outfall 01A

The new permit includes weekly monitoring requirements based on grab samples for the Internal Outfall 01A parameters conductivity, total dissolved solids, chlorides and fluorides.


### Outfall 002 

### Discharge Parameters

Flow - Outfall 002

Flow monitoring allows the mass loadings for discharged contaminants to be calculated. Flow must be reported in Million Gallons per Day (MGD) and monitored at the time of sample collection. pH - Outfall 002

According to the State of Tennessee Water Quality Standards [Chapter 1200-4-3-.03(3) (b)], the pH for the prolection of Fish and Aquatic Life shaune within the range of 6.0 to 9.0 and shall not fluctuate more than 1.0 unit in this range over a period of 24-hours. The sample type will be grab measured at a frequency of once per week (l/week).Nyrstar Clarksville. Inc. (Rationale) NPDES Permit TN0029157 Page R-7

Total Suspended Solids (TSSl

- Outlall 002
The water quality narrative TSS criteria noted above for Outfall 001, also applies to the Outlall 002 discharge.
Total Suspended Solids is a general indicator of the quality of a wastewater and will be limited in this permit. The State of Tennessee Rule**1200·4~5.** which held effluent limitations for industrial wastewater treatment plants, was revised in July 2004 and this limit was removed. However, the daily maximum concentration for TSS of 40 mg/I will be retained from the current permit to comply with the "anti-backsliding" statutory provision. Considering the nature of wastewater collection and discharge system, the sample type will be grab measured at a frequency of once per week (1/week).

Settleable Solids - Qutlall 002

The current permit limit for Settleable Solids of 0.5 mill daily maximum concentration will be retained in the new permit to comply with the "anti-backsliding" statutory provision. Considering the nature of wastewater collection and discharge system, the sample type will be grab measured at a frequency of once per week (1/week).

Total Residual Chlorine - Outlall 002

The daily maximum limit of 0.019 mg/I for Total Residual Chlorine (TRC) will be retained in the new permit. The new limit is based on the 

### TN Water Quality Standards applied to a low flow stream condition of 0.0 MGO. The background concentration of TRC is assumed to be 0.0 mglL.

The acceptable methods for analysis of TRC are any methods specified in Title 40 CFR, Part 136 as amended. The method detection level (MDL) for TRC shall not exceed 0.05 mgll unless the permittee demonstrates that its MOL is higher. The permittee shall retain the documentation that justifies the higher MOL and have it available for review upon request. In cases where the permit limit is less that the MOL, the reporting of TRC at less than the MOL shall be interpreted to constitute compliance with the permit limit. Please note that any TRC detected at or above the MOL will constitute a violation of the permit.

The sample type will be grab measured at a frequency of once per week 

### (1Jweek), and the compliance point for total residual chlorine is at the confluence of the discharge and the receiving stream.

Outfalls SW3, SW4, and SW5 Discharge Parameters

This facility is one which has stormwater runoff associated with industrial activity, as defined in 40 CFR 122.26 (b)(14). Effluent monitoring requirements for outfalls designated as SW3, SW4, and SW5 where developed and are applicable to wet weather discharges from the permittee's facility.

For the new permit's stormwater runoff benchmark/cut-off parameters to be monitored and reported were determined by comparing the permittee's discharge OMR data, the permit renewal application Form 2F results, and the following updated Tennessee Stormwater MultiSector General Permit for Industrial Activities (TMSP) criteria.

### Nyrstar Clarksville, Inc. (Rationale) NPDES Permit TN0029157 Page R-8



### Parameters of Concern Cut-Off Concentration [mg/L]

Cadmium (TJ 

### 0.0159 Total Susoended Solids 

### rTSSI 

### 150 

## coooer tt) 

### 0.0636

Lead 

## 'J 0.156 pH (range) 

### 5.0

- 9.0 Total Recoverable Zinc 

### 0.395 Note: Sample values are from the Tennessee Stormwater Meltt-Sectcr General Permit for Industrial Activities, Rationale, Pari Ill, Table Ill-A: Parameter Benchmark Values. 

### Consistent with the permittee's current permit "benchmark/cut-oH concentrations" will be used 10 evaluate the effectiveness of the permittee's stormwater BMPs for the facility. If the permittee's discharge exceeds the above new permit's benchmark concentration the division requires that the permittee complete investigations to determine the reason(s) the higher valuers) occurred and make as needed BMP improvements for the relevant pararneterts). The permittee must documenVmake effectiveness assessments for such BMP improvements. A wide array of improved/enhanced BMPs exist for making stormwater runoH quality improvements. BMP upgrades may be applicable to the permittee's stormwater controls (new permit Part IV BMP Plan andlor Part V SWPPP). 

### There are no effluent guidelines for stormwater dischar:ges from the Nyrstar Clarksville, Inc. facility, The permittee's current permit did not have effluent limitations for the facility's stormwater runoH, and all parameters were monitored on a "Report" only basis. Similarly, the new permit will not establish effluent limitations, but will require reporting of effluent characteristics for the Outfalls SW3, SW4, and SW5 discharges due to stormwater runoff. In order to assist the permittee in the evaluation of the effectiveness of the SWPPP, benchmark values developed for the Tennessee Stormwater Multi-Sector General Permit for Industrial Activities are provided herein for comparison. These benchmark values (cut-off concentrations) were developed by the EPA and the State of Tennessee and are based on data submitted by similar industries for the development of the multi-sector general stormwater permit. The cut-off concentrations are target values and should not be construed to represent permit limits. The division recognizes thai a "first-flush" sample would be the most accurate representation of the maximum daily value for various pollutants in the stormwater runoff. Furthermore, stormwater sampling requirements included in the TMSP require analysis of grab samples collected within the first 

### 30 minutes (or as soon thereafter as practical, but not to exceed one hour) of when the runoH or snowmelt begins discharging. Every effort should be made to collect a "first-flush" sample representative of the daily maximum values for sampled parameters.
Flow Outfalls SW3, SW4, and SW5 

### Flow monitoring allows the mass loadings for discharged contaminants to be calculated. Flow must be reported in Million Gallons per Day (MGD) and monitored at the time of sample

### Nyrstar Clarksville, Inc. (Rationale) NPDES 

### Permit TN00291S7 

### Page R-9

collection. In general, the division does not establish flow benchmark values for individual permits, unless based on the specific site conditions/inspection results it is obvious that the stormwater runoff is hydraulically adversely impacting the receiving stream characteristics and BMPs (e.g., velocity dissipation structures) are warranted. Flow monitoring is being retained from the current permit.

TSS 

### Outfalls SW3. SW4. 

### and SWS 

### The receiving stream water quality narrative requirements for stormwater TSS control is basically the same as that noted above for Outtalls 001 and 002. However, stormwater runoff typically results in higher TSS concentrations due to soils erosion. For large diversified industrial facilities, higher TSS concentrations in stormwaters might indicate the need for increased in-plant housekeeping, including dust controls. The current permit includes 200 mg/L as the TSS benchmark value, which was based on the prior TMSP. However, the new permit includes a 150 mglL TSS value, based on the division's most recent TMSP. pH Outfalls SW3. SW4. 

### and SWS 

### The basic rationale for pH monitoring is the same as that noted above for the permittee's Outfall 001 and 002 discharges. The pH benchmark/cutoff monitoring requirements from the current permit (5.0 - 9.0 s.u.) will be retained for the new permit. Monitoring the stormwater pH can also provide valuable information regarding locating on-site leaks or spill.

Heaw Metals - Outlalls SW3. SW4. 

### and SWS


### The stormwater discharges from Outfalls SW3, SW4 and SW5 must be monitored for the heavy metals, cadmium, copper, lead, and zinc based on grab samples.

R10. ANTIDEGRADATION CONSIDERATIONS

Tennessee's Antidegradation Statement is found in the Rules of the Tennessee Department of Environment and Conservation, Chapter 1200-4-3-.06. It is the purpose of Tennessee's standards to fully protect existing uses of all surface waters as established under the Act.
Stream determinations for this permit action are associated with the waterbody segment identified by 

### the division as segment ID# TNOS 13020S01S_2000.



### The division has made a determination of the receiving waters associated with the subject discharge(s) and has found the receiving stream to be available conditions waters. Available conditions exist where water quality is better than the applicable criterion for a specific parameter. The applicant has demonstrated to the department that reasonable alternatives to new or increased degradation to the available conditions waters are not feasible.

The department has maintained, and shall continue to assess, the water quality of the stream to assure that the water quality is adequate to protect the existing uses of the stream fully, and to assure that there shall be achieved the highest statutory and regulatory requirements for all new and existing point sources and all cost-effective and reasonable best management practices for nonpoint source control.

### Nyrstar Clarksville, Inc. (Rationale) NPDES Permit TN0029157 Page R·10

The following approved TMDL has been issued for several receiving streams within the Cumberland - Lower Barkley Lake watershed.

Parameter TMDl Approval Date E. coli 

### December 26, 2007 This TMDL's provisions are not applicable to the permittee's dischargers because the plant's discharges do not drain to the specific receiving stream segments noted in the TMDL. Also, as noted in Section R9, E. coli 

### is not a discharge parameter of concern. As shown in Appendix R-5 and discussed in Section Ra, the additional chloride and fluoride loadings in the washwater from the permittee's newly-installed Crude Zinc Oxide (CZO) facility presents a de minimis 

### impact, since these parameters use less than five percent of the receiving stream's available assimilative capacity.

Rll. BMP AND SWPPP CONTROL PROGRAMS The division does not want/require redundant control plans. As such, the new permit allows the permittee to develop a single comprehensive BMP/SWPPP control plan, by consolidating elements presented in the new permit's Part's IV (BMP) and V (SWPPP). The division considers the receiving stream water quality proteclion afforded by a BMP/SWPPP program to be warranted lor the permittee's large industrial complex, The permittee's new permit does not include specific monitoring requirements/limits for all contaminants which might be expected in the permittee raw wastewater intermittently due to leaks/spills and/or from stormwater runoff, for which the permittee's treatment system is not expected to remove because of characteristics/loading, Thus, the division requires the permittee to implement, as an integral part of its wastewater control system a BMP/SWPPP program, which includes housekeeping measures to better handle the contaminants which would otherwise flow to the permittee's wastewater treatment plant. The division considers that the new permit BMP/SWPPP program requirements can be achieved by the perrruttee using its reasonably available materials/plans, which can be updated based upon site conditions/operational needs, Therefore, the finalized permit includes the following introductory statement in Parts IV and V:

'The permittee may consolidate the elements presented in Part IV (Best Management Practices Conditions) and Part V (Stormwater Pollution Prevention Plan) into a single BMP/SWPPP document as an overall control program for its facility"

R12. WASTEWATER TREATMENT SYSTEM INTEGRITY EVALUATION The permittee must within eighteen months from the permit's effective date submit to TDEC's Nashville Central and Environmental Field Offices (Division of Solid Waste Management) and Division of Water Pollution Control - Permit Section) a report which addresses the structural integrity of any earthen basins associated WIth its wastewater treatment facilities and any waterborne waste and sludge storage/disposal units that are constructed of earthen fill. Upon submittal of the structural integrity assessment and based on recommendations and/or qualifiers provided in the report, TDEC and the permittee will determine what, if any,Nyrstar Clarksville, Inc. (Rationale) NPOES Permit TN0029157 Page R-l 1

improvements will be required. Based on the potential for harm to human health as described, additional site specific evaluations may be required.
Requirements to include permit provisions deemed necessary to protect waters of the state, are based on T.C.A. 

### § 69·3·108. It is expected that the permittee's structural integrity 

### submittals will 

### be reviewed by the division's Water Pollution Control and Solid Waste Management personnel. Although 

### it has not been determined at this time, the division may request additional evaluation input from its outside consultants and/or the U.S. EPA.

R13. PERMIT DURATION

The proposed limitations meet the requirements of Section 301(b)(2)(A), (C), (0), (El, and (F) of the Clean Water Act as amended. It is the intent of the division to organize the future issuance and expiration of this particular permit such that other permits located in the same watershed and group within the State of Tennessee will be set for issuance and expiration at the same time. In order to meet the target reissuance date for the Cumberland-Lower-Barkley Lake watershed and following the directives for the Watershed Management Program initiated in January, 1996, the new permit will expire in 2015.

### ---- Nyrstar Clarksville, Inc. (Rationale) NPDES Permit TN0029157 Page R-12

APPENDIX R-l PERMITTEE'S DISCHARGES, RECEIVING STREAMS, AND WASTEWATER TREATMENT SYSTEM

OUHlIlLOOl LOIJGITOOE lATITUOE

,'V'1",};; J'i ;1Te1

"''' Flo

...... and W".te'!!",,'"**'iour~e.**

'''''::d OO',ot C",m,**~",,...,c""** p'oe, '(-'0"'''''01« Ch Ano<!e.Ci'thGde 'Nash ee:;**HJ"3~ 8:~** **Ca~** 1'0'''' Cort'CllDUS Cool!**Co~~nU3l" ~e~~"**  OtrtIall

ELG Wastesu"am. '-25

'09 ': 0) I: l,' 000

, so 51.1)4

PlOee

.. Re'ated Wasoostreams ': S, 3,' ':' so 2, SC**~~** 00

2li8.5J

Non_HG Was«>sITeam; 

# , I" 0' ) ,-", ,- cC,



### - fi: .; 0(,



# '" 

# "' oem

430,59 Treatment: 0.013 m tt.s

.. 

# •

<':('0,1", '·'_'o;!".,ol", 'Gas**'='e"~,"o** 0013" Cel: Ho_,," f.I.lal,**"'~o** -,.'" 0,181 m 

# • 62.A 

# ,**~~"," e,,':~'**  Blc', dOI Au;P;",,: ,Cent-a**~"t** 

### 'U.I"', R",,,"_,,,,,,**'>:.ad~** ;C"eoto;d t·, c, sc'" OO:_nd 

# , 0,16ll m,.**n.~**
0,62\1 m 

# • 100.0 

# , Chemical precipitation, mixing, !!.edimentation, coagulation, jloccujation, anti neulralization, OIJTFALL 001 RECEIVli'lG STREAM

(umbe,I""d Rive, "I mile 122

STREAM LOW tete i 

# "'" 

# I HOWIMGOI 1.696 1.101

RECEIVIItG STREAM OESIGNATED USES
.'.Q ,>< REUlEA"'l(IIj**"~~T;':;j,** X x
"';'c**';~'·.'G."lON** 

### x x**J01"S~-C** 'IS" , 

### ,"",',',
X X X
'iCL'S

OUTFAll 002 RECEIVING STREAM

OUTFALL 002 lDNGITUW:

• LATITUDE

T-2l-16 36-3'-'11 

# I
I I unnamed tributtlly to !he ClIIlIbertand River at mile 122.6

STREAM lOW 1010 300' FlOW(MGOI 00 :' 0

Uon-ElG Flows and Wa$le$l1eam SOUfc.ef '6 DemlnHailLe' R<=generale Waler RECEMIfG STREAM OESIGttATED USES ';,2 ',"; ate-**P'3l1~ C',eI11JIi'fI~er**  B1Kkl'lash 

# ". 0,110 m d**'~"** I**~,)** LFE 

### x**~;:lVIno~** X "--""",,no'. 

### x**~"iU,** X oces-r

Treatment: Neutraljzation and sedimentation nus"'<l4'**!J~'1GATI(llj**Nyrstar Clarksville, Inc. (Rationale) NPDES Permit TN0029157 Page R-13

OUTFALL SM**~ECEIVING** STREAM LONGITUDE LATITUDE DISCHARGE ROUTE

-67-2J-16**36-~B** unnamed triboJllll'y 10 ttle Cumberland Rwr ;1\ mrle 121 1

flOW DISCHARGE STREAM LOW 1010 1010 3005 (MGD) SOURCE FLOW CFS 00 00 00

veees StomrwiltPl I'Jncrltand Gooh 

## ••• MGO 00 00 00**ST~£AM** USE CLASSIFICATIONS ATER QUALl**,~e** RfCHtAfI;ltl I<Raj.. ToJll**,>'i~"i** CQIIi'S"-": X X x X IlIDUS'lU>L r'AVIGATl.:'tI Varies TOTAL DlSCHARGl Treatment collection and 

### en to wastewater nearmeot 31 % of the runoff

OUTFAll SW. RECEIVING STREAM LONGITUDE LATITUDE DISCHARGE ROUTE

..**1j7·2~·20** 36-31-12" unnamell tnbutilf"l til tile Cumberland Rr,ef at**m'l~** 1:'26

flOW DlSCHARG£ STRE.Alol LOW 1010 1010 3005 (MGD) SOURCE FlOW rcrs 00 00 00 Vanes Stormwater runoff and co,", 

## ••• MGO 00 

### o.c Q 0

STREAM USf CLASSlFIC.A TIONS ATER QUALl "e RfC.REATCtI JffiG'o TO/,**L"'!~'** [)OVESTtC X X x X**~""""-** MVIGAIDN Varies TOTAL DISCHARGe Treatment None

OUTFALL SW5 LOHGITUDE LATITUDE

-87-25-00 36-31-15 

# D: DISCItARGE**STRE~Cl~** 1Ql0 1010 

# """ (MGOf SOURCE 

### now CFS 00 00 00 Vanes Slomtwatef lunoff MGO 00 00 00

STREAM USf CLASSlfK:ATIONS MER QUALl F;St;**RfC~E"71O~ 1R'l/.::"'-TK'~**  c'·, ;", ccees-« x X X X t«luS"Ri4l**~"'VIG"'T(J1l** Varies TOTAL DISCHARGE Treatment- None

OUTFAll SM RECEIVING STREAM LONGITUDE LATITUDE OISCHARGE ROUTE

.B7-ZS-00 36-31-30 unnamed tnbuliJl"! to lhe Cumt.eriand Ri'ief at mile 122 6

FLOW DlSCHARG£**STR~~ct~** 1Q10 1010 3QQ'**~MGOI** SOURCE 

### now CFS 00 00 00 Va"es Stoonwaler runoff MGO 00 00 00**~TRt:AM** USf CLASSIFICATIONS WATER QUALl**f!S~ l'lfCRt:ATKl~**  MG"TOll**LI',~':'** C'OM,o;;--,: X X X X t£>uSTl'Ac rio>.V1GAmN Varies TOTAL DISCHARGE Treatment None IlfCEIVING STRfAM DISCHARGE ROUTE unnamed Inl>ulw}**I~** too l"umbeftand RMlI at m,le 121 1

### Nyrstar Clarksville, Inc. (Rationale) NPDES Permit TN0029157 Page R-14

WWTP - Schematic Diagram



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### -- Nyrstar Clarksville, Inc (Rationale) NPDES Permit TN0029157 Page R-15

APPENDIX R·2 CURRENT PERMIT LIMITS AND MONITORING REQUIREMENTS



### PEIMTUr.t1S C1IIFPUOO1 flR)l :e;.e; W§TEWA'THI



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### eesss d lFC<re <Df ITEtto:Is il Tille 4Ja:FI. Pat 133 as 

### erecer lte Il'Btu:I cblDi:n 

### ea tr lFCstaI 

### rrr 6IlE6:l QC5 rrg1i.d:ss 

### ee pmilIeed::r1 U B1<Ds tht its M:Lis I'i;t'a". lte staI rEt:i1lted:usrH'tfi:n tta. jlSife; tre t1oj'u M:La-d ree it ferre.iEwLp:n 

### reaes. Incases hl parrit imI isless Ita: 

### se t.n... 

### eerq:xrti"g d TFCct less ltB1lte Ml...!hlII 00 i1a'ptta:lIoCIl"l'illl.Je UJ I f:Ia u:: Wlh lte perm liTiL 1l'e c:crrpiln::e IX*t b'tai'Jll'I!lllIclR d'bft is allhto::riluen:ed**1tv~1n:l1'e~** veIEn.-- Nyrstar Clarksville, Inc. (Rationale) NPDES Permit TN0029157 Page R-16

PERMT U'"'"

CJJTFAllS SW3 and SW/I stcern water RIroff, steam Producecl caoensate and"'scalanecus Non-Process water

EFFllENTUMTAlIONS MllNlURlNC 

# _v

DOIlV REOlIREMENl' AVG.CONC AVG AMlloT. EFfl.lENT otARACTBlISlIC FRQNC\'. n

.. FlOW 1/OJarter Estimate

pH 1/OJarter Om" TOTAL SUSPENDED SOUOS (TSS 1/OJarter Ocab CADNlIJv'I, TOTAL 1I0Jarter Gcab COPPER, TOTAL 1JOJarter Gcab MAX.<DNC MAX.AMl\ET. M'iRMNT. "'W'LE I

.... 

# ....**(~** MGO • MGO •



### - -

-- 

### -- 

# ""'"

lEAD, TOTAL 1/0Jarter Gcab ZINC, TOTAL 1/0Jarter Gcab

Flow shall be reooted in**~1Iicr1** Gallons per Day (r-IGD). •• pH analysesshall be perfcme:::l v.ilhin nflOO1 (15) rrinutes of sarrpe ccaectco.

The perrrittee shall provoe Itle I1':I.le and duralioo (In f-ours) 01 the**~lftyif"'J** slam**~(s)** sarrped; rainfall rreasurements exestimates (in Irdles) of the stern eveot that generated the serrpled 

### nron the duralioo belY.eoo Itle storm ewnt serrped am the en:J of the pecocs rreascrebe (g-ealer than0.1 irdl raJnlall) stern event. ero an esereie ollhe total 'odllTE! of the discharge seooeo. F\oN shaJl be rernrted In Milo-. Galkns per Day (M:iD).

I

_V EFFUJ!N1' AVG.<DNC otARACTBlISlIC FlOW

pH
roTAL. SUSPENDED SOUDS {TSS 

### - CArMUM, TOTAL -­ COPPER, TOTAL -­

lEAD, TOTAl.. ZINC, TOTAL



# . RO\'Ishall be reccteo in Mllim Gallons pee Day (M3Dl



# .. pH analyses shall be perrorreo v.ilhin Hfleffl (15) rrinules of sarrpe colectco

. The pernnee shall provide!he I1':I.le and duratOl (in hours) of the**~lif;''lOg** srom event(s) 

### S<lIl"Ped; rainfaJl rreasuereus exestimates (In Irdles) of !he storm eveuuet generated!he sarrpled I1J"Off; !he durahcn 1:leMeen!he storm event serrped ard!he em 01 !he prENioJs rreasoratse (greater than 0.1 irdl ramlall) SICfTTl event; arc an estimate of the lDIaI ',Oll.lre of !he disdlarge sarrped F\oN shall be rep::lf1ed in Mlhcn Gallcns per Day (M:iO) PERMT U,"", 

# I

OUTFALL SV1/5 and SV'I'i stoon

_ RuOOff

AVGAMNT. j 

# ,,"
MGO ' EFR.lENTUMTATKItS MllNlURlNC DOIlV REQUREr.en5 MAX.<DNC :\tiJt'\I!'H. So\.'l.tI'I...L ( FRQNC\'. 1'\:'ft: MGO ' Seni-annuall Estimate Seni-annuaJl 

# "'''' 

# ""'"

- Seni-annuaJly ereo
Seni-annuall 

# "'''' Seni-annuall 

# "'''' Sem-annuall 

# "'''' Seni-annually 

# "''''APPENDIX A·3 DISCHARGE MONITORING REPORT (DMR) RESULTS Nyrstar Clarksville, Inc. (Rationale) NPDES Permit TN0029157 Page A-17

TNOOZ9161 DMR Summa outran 001


# ., rss Ca<lmi"", line AI

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### Outfall 001 Treated Effluent Zinc Loadings
- Probability Plots (Monthly Average and Daily Maximum Loadings)Nyrstar Clarksville, Inc. (Rationale) NPDES Permit TN0029157

TNOO29167 DMR Sumrnarv Outfall 002 Month Flo_**MA~ DM~**  Dmm OM ax 

## OM.'**~,** 'su 

## ,,' Re rt Re art 

# ••• 9.0 

# "" 40.0 o 171 0217 67 7 19 

# •• '.7 8 0 1591 0= 65 72 6 01543 0_21 • 8 7.2 9 01266 o 18'9 7 1 8 5 0125 0.197 73 8.3 5 01272 0181 76 8' 7 01483 0.234- 7 8 3 6 01729 0285 76 8A 7 o 1836 0239 77 8 1 6 o 1715 0217 7 7 8 5 10 0_ 16 

### o 195 7 7 87 9 01626 0207 7. 7 8 6 01625 0186 74 7.7 8 

### o 1533 o 191 73 81 9 

### o 1552 0_191 7 7 5 11 00996 0219 6 7 5 12 00908 0122 722 833 7 o 1189 a 211 76 823 8 0.1167 0214 754 798 9 NODI NODI R NODI NODI NODI R NODI tJOot R NODI· NODl NODI R 01232 0258 737 8" 10 NODI NODI R NODI NODI NODI R 014-72 027 744 789 11 0.1596 0297 7 31 756 7 0.14-2 0182 75 76 10 0.127 0155 75 76 5 0_128 0235 75 7 9 6 0_125 0157 75 82 5 0.129 0219 7.2 79 8 1/3112009 o 109 0.202 7.6 7 8 6 2/28/2009 008 0125 73 7 6 6 Settleable Solids pH TSS Ending DM<O>t



## ,. ,'"

0.5 Penn It Ihnk 0 6130n006 0 7/31l2OO6 8/31/2006­ 0 913012006 0 1013112006 0 11f3.0/2006 0 1213112006 0 0 1/31/2007 0 212812007 0 4130'2001 3131/2007 0 513112007 0 6130/2007 0 0 8131/2007**~~2007** 0 9/3012007 0 '1013112007 0 11/3GI2OO7 0 12/3112007 0 1/31J2003 0 2129FZOO8 NODI R 3/3112008 NODI 4/30/2008 0 

# "

513112008 NODI R 6/3012008 0 7/3112008 0 813112008 0 1 9J30n008 0 1 10/31/2008 

### o 1 11130/2008 01 12/3112008 

### o 1 o 1 o 1 3/31/2009 

### o 106 0163 66 85 10 o 1 4/3012009 0_129 0099 7. 83 10 

### o 1**~/31/2009** 0099 0177 7 76 o 1 .,3W2009 5 0088 73 NODI 9 73 21 001 7/3112009 0108 7 2 0182 73 14 o 1 8/3112009 0089 72 0133 72 6 

### o 1 913012009 o 103 73 3 0145 77 

### o 1 1013112009 

### o , 7.1 

### o 1 1113012009 0184 785 3 0097 0266 73 75 

# • 8 

### o 1 12/31'2009 

### o , o 118 0203 7 5 78 1/31/2010 a 107 

### o 193 7.7 78 

### o 1 

# • 3 2128/2010 0128 0208 7 9 78 O. t 313112010 0123 0222 8 7 78 5 01 4130/2010 012 

### o 159 76 76 2 

### o 1 5131/2010 o 132 0217 7 5 7 J 5 

### o 1 6130I2010 o 124 026-2 7 5 79 2 

### o 1 7/3112010 

### o 13 7 5 0185 78 9 o 1 8'3112010 c 106 7 1 21 0148 7 2 o 1 9/30'2010 o 114 0.172 72 75 

# • 6
5 

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### o 191 76 o 105 0165 7 5 7 7 

### o 1 12/3112010 0102 o 138 7 6 82 

# • 4 

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# • 8 

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Pennlt 'bnit Re 

# .... Re art 6.0 9.0 40 

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### o 06 r>.1inimum 008 6 ..0 20 000 6 7 o '2 1\.1aximum 018 000 7 8 9 0 21 o 10 Exceedanc@s NA NA 0 0 0 

### c Count 55 56 54 56 56 56 Page R·19

TRC
DMa>t

0.019 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 NODI NODI 

# " R 0 r·JOOI R 0 0 tJODI 9 NODI B NODI B NODI B NODI B NODI B NODI B NOO\,.--B NODI B NODI B NODI B NODI B NODI B 0.14 tJODI B NODI B !'JODI B !'JODI B NODI B NODI B NODI B NODI B NODI B I,JODI B NODI B NODI B NODI B NODI B NODI B NODI B NODI B NODI B tiOOI B 0.019 001 000 

### o ,.

1 24

### Nyrstar Clarksville. Inc. (Rationale) NPDES Permit TN0029157 Page R-20

TN00291 57 OMR Summary Outfalls SWJ and SW4**1.l0"1~** Ending Outfall SW3 Outfall SW4

01 266 t 

### a.. 1a5 ,Q7S 1 ,4 i 

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Permit limi! h.:,­ r.h:rruCf' MJmrLJ'"**Exce~da"c~<:** Count Cutoff VoJlt't5 Permit limit 6:30,'lOOli 913Oi2006 12131'2006**ff11!2~7** 6:30.'2007 9i3012oo7 12:]112001 313112008 6i3O'2008 9130 1 2008 12J31flOO8 3,'31/2009 &i3Qi2009

TN0029157 DMR Summary Outfall. SW5 and SW6**"'gn\~** Ending Outfall SWS

,0 I 10005 7



# '"" DMax

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# , IlOOI-C 16 :::1,10;' Irrmn-Drmn '''' o: su R He rt

r IOCI-9**~jODI-~** uoo 911001-9**r:,:,[J1-91l<.'DI-~** riOOI_4 rJ0CH rir,['1 9 I)(-'01 1 031 8**W\Ot~** 

### ucor-c (lliS 70 0722 749 o**~7.j** c 1 Re Re 

### c 851 72 

### (1m s a 10}1 76 UA I,M 

# , , 1M E.O.9.0 0;**0.1~** 014 

# "

OJ,J R. on 

### o 16 Q 10 

### o**~j** 

# "' o 2

7 

### o OS 07£ II:" 5 O.06Jii o :'0& o 73 Re on o 2



### a 3 174 !{A. ; 0.395 R .mc t: ,rr, t­ ,"'­ L Re I>l1 Re Or! Re 11'.:'81­ roc :' !jOOI-9 110['1· IIC}Di-:' fJOOI 9 Ij,')[:I-" 110[11 11001-9 Il')CI­**IJODI-~** I-JOOI-9 

# " 76 14S 169 m 

# ,.IJOQI**IJODI~** IJODI.tlODI014 04' 0.05 

### c H3 09' R.

OM 005 

## 0" 

# '" 5 a.Ol¥.! 990 120 R. on



# " 20 120**,~**
100 He on 11001-9 1,001-9 r'JODj rIOOI-9 

# "

, rt 

### s

8 0 

# '" s 6.0.9.0

7 7 C-·.,-.;" Drmo

8 R. on 

### "" He 011 110[>1-9**I!OCI-~** 'Ked 9 rJC'DI s**R~** 011 1,iD\ 

### c Dot 2399**~jA**

5 

# ,. 2 39,' (068"

'" ,j Ile Qrt >,'CI-9 ',']CI c, U[I 4**\C'DI~?**

6;30J7U10**n~l:201{1**

P",on" limit**;.:~, ':,;.ri'''~~T'** **·.'a'·~'uM** E"CMc30d, Count Cutoff Values

Permit limi! 6i30i200G 1213112006 613012007 12/31:2007 6<WJ]OO8 12.'31!2{l{lll 613(lilOO9**~009** Outfall SW6



### o 13 I) F.2 liA

0.395 

### ne 011 004 00' 005 

# ,,. , 0,",-" Re crt 01

01**I~** 

# , e.ree

### Nyrstar Clarksville, Inc. (Rationale) NPDES Permit TN0029157 Page R-21

APPENDIX 

### R·4 APPLICABLE EFFLUENT LIMITATION GUIDELINES (ELGs)


### Actual Production Rates (al

Plant Nea

Cell House Cast House Cadmium Plant Metalluraical Acid Plant Concentrate Preleached 

### Production (01 (Short Ton5l00yl 398.18 377.14 

## 108 475.16 

## 00 (a) Production values are maximum long-term (12 month) dally 

### average for period January 2006 through December 2009, based on operatrn<J days-- Nyrstar Clarksville, Inc. (Rationale) NPDES Permit TN0029157 Page R-22

Effluent Limitationl GUideline. Ma •• loading Dilcharge AUocltiont for NontelToul Metsll Manu'acluring. Primary linc SUbcategory

Actual**F~A** C,u'dellfle, II**~_** BPT Lrrmtatron BAT Limitation .:'::::::;­

we steweror Sourr.-**:f'Milm~ter** Production lal**~,l[mlhl'** -Aver-eClf' Oalr. Maximum**Dal~'** Maximum M Avera e**H,·n~<d~·** , ,Ih.mdl',," lb.**d~,d.",** iH··,,'.,.,**I~ ,Il>'d~**  ,lb

.. m,lh"" Ih !b,da'<)**l",m~"'Q"** It ilc'cia' Arseorc 1M 

# ! NA NA NA NA Sut,par1 H I"J JQ/l18 Cildmmlll 

### o ceo o OJ" 

### o oee 0068 ::;8{\rOIV'E' :','"E"1 Cooper ,98 U:" 0210 0553 0440 0'''' .vavre- ...·<[8r Lead J9818 

### o ose I 1)045: 0121 0091' SelenllJrr, NA 

# I ! NA NA NJ'. NA Lin, 398 18 0182 0145 

### o J:-.1 0.441 T:=;s NA IVI NA



### - "A

- "AI

­

,Ars",nlC NA NA NA 

# j '" -j9E< 1,,, 

# '"**Subpartl~it'l** Cacrruum



### - 0060 0119 Cooper "':."lhade**~"(1** Aoooe 

### ace 18 0458 0313':. n 9131 0765 

# 00"·1 0150

'-/Va"h'Naslcl>'<ller Lead 

### sse 18 

### o D98 0076 Q <'10 

### o 167 Selenium NA NA, NA NA 

### 'JA I 398 1'3 0315 01)10 TSS IZinC 0.251 07613 NA NA l'IA NA 

# i Arsetuc I"

... ­ NA NA NA NA NA Subpart H Ig! Cadmium I) 011 0014 

### o Ci27 Casunc r.omart 0036 ;'77 

## 141 I ;77 q • Copper 0110 0175 023<' 003J I**C0~)ilng** J71 14 l t.eed 0024 I) 0:'1 0038**C'0~~** 5eler1IUm M NA IV< 'lA 

### i 377 14 Z'nc. 0076 

### o**0~,7** 0135 0140 '-55 NA NA NA r.A**A(~enle** 

# '''' NA NA IIA NA**SuLJ~Hrt** H (11' 

# ", 0<94 0001 

# '''' 1 2JJ. : ° 003 [cadmium 1 .' Cad-n.urn**PI~rll** Copper 00

- 3765 0008 7899 1 ° 017 ';";' ..ste.vare- Lead 1 08 0802 1728 0004 0002 

# Iseeruum NA IIA NA NA NA Z,n, 108 n 006 I) 295 2592 I) [1'4 TSS 

### - IIA NA NA NA NA



### - .­ 'A(wnlc NO 1'1.-,\ NA NA NA Sccoao 'i ib) Caomnm f\ Of, 0072 0000 ° GOO i n 180 

### o (}('){J , PreLcdLIl of Zinc Copper 

### o f>CJ 

### o '55IJ 1 153 0000 

### o U(I 0000 I**CQnCenl'"t'e~** lead 

### o 117 0000 0252 

# I seiemor» IIA NA NA NA NA IZme 

# , (100 0378 I) 919 lJ 000 0000 iTSS NA NA IV< 

# '" i 4,rsenr<:; 377 1,..1, 080 0.603 

# "0 1.207 

# '" NA NA Summary lor IIC'ldmium 6 n.,4 8.00 3771-'11 3017 0.087 0.218 Primary lint 1 Copper 

### -**~17** U­ NA rJA

­ 0.656 1.398 377 1-'1­ 

# ",
NAi 

# '" Category ILead NA! IlA 0. 142 1 0.306 NA 

## '·F,**S",~nlulll** J!7 1-'1­ 400 302 60.3 (.J,t'lf 800 line 377 14 40 I) :'C' 2 800 602, 0.4691

- 1-114 

# ''''

TS5 377 14**,~10** 'J 158.4 316.8 NA NA 420 ° Alsenlc 47:, 16 NA NA NA IIA 1 ':>8J. 1.505 ."5:;'0 3.374**Sl>b~,aI11** ,'C<ldmru,n (. 1i' 1 I) <'04 I) 511 47'> 1" 1 009 U086 018 0.194 0.486 1 ':){11 '-.(10**·H~, 1~**  Me-lallurg'cal Ac."J ! Copper 1 5S8 1.481 :J ':03'1 3.107 200 4752 47<; 16 (179 07':.1**P'<l~i~** Lead >sO 1 711 0:'U2 0.316 , 

### o 71::' 0.679 475 16 NA**~A:** NA NA ISeleflium 'jA NA NA 0\,10**47~.16** 

# ""I 3 so 

# '" 3421 2_476 475113 1 

### on 

# I 1.020 2.305 NA**~<A 1~.2**  0 144.4 3D40 288.9 NA

,**c~** 

### f---



### - rss 

# '" I-­ l,Aroel1lC 2.109 4.580 0_281 0.703 Combined Totsl Caorrsen 2.147 4.504 Man Limitalionl (b) Copper 0.985 Lead 

# '458
30.2 60.3 Selenium 1.478 3.590 Zinc 605.7 302.8 TSS

, 

### ,**,~J** P"rS,Ja1t to pr Jdu,III,n rate-s 

# - shewn above ,D' Lomb.ned IIIT1Its are ew swn of the subr**<11t'9'-~ry** nmoauons ot either BPT or 13A T uowever. lor MelahurglO: at ACid Plams 2>A;- was i.l",.(1 ueca«,e BPT enoreooa, «o.careo lowpr v;;llJe" tor r-adrroum anc one r'olf; f.'(,5IWlng(ni ELG values she

..... n In Mid 1011\

### Nyrstar Clarksville. Inc. (Rationale) NPDES Permit TN0029157 Page R-23

TECHNOLQGY-BASED OUTFAll 001 DISCHARGE ALLOCA11ONS 

### Monthly Average EFFLUENT Non-ELG Wastestreaml Total Aloeation CHARAClERtSllC ElG WastestlUrm F",. BPJ BaSIs al Loading Total Flow LoadIng C"" er Non-ElG 'c Total

## ~lG(b ",,,,,.1 lmodl llb/dav\ "lbidav) IIbfd'" 

### 'm.tI I llbid'" 

# ''''''''' 15014 1112 509 00727 31 03832 9.923 ARSENIC 2.'09 2 [100 00727 

### 04 03832 1 322 068 228 0.281 CADMIUM 15285 17 43 00727 32 0.3832 10102 518 COPPER 2147 372 0.0721 

### 0] 03832 2.155 111 3261 

### 0458 

### LEAD ITI**2~~,** 110727 

### 444 03832 141.959 7283 214790 30171

# ~E~~M 03832 6954 3568 10522 120**~NC** 0.0727 22

1478 00727 44Q 03832 1425 731 2. 1,56 2459 TSS 303

EFFLUENT Dew Maximum CHARACTERISTIC ELG 

### Walteltreams Non.ElG Proceu Wastestreaml lotal Allocation Cone Total Flow BPJ BaSIS Ia loadlr'lgs loadings 

### Fo. loerElG b Ioer NOfl.-ElG Ie) Tolal

.__ (\t)!dai {Ibida v ImOOi lmaill 

### lJI""v) IIb,d", ImOO'**~/""v'** ARSENICm 4580 00727 67 03832 21 556 832 29866 

### 3445 CADMIUM 0703 0.0727 

### 10 03832 3 JOB 128 4.564 529 4504 COPPER 0.0727 66 03832 21192 818 29.370 3387 LEAD 

## m 0985 0.0727 15 03832 4635 1.79 6423 741 SELENIUM 60 342 00727 888 0.3832 283918 10957 393484 

### 454 ZINC (f) 00727 53 03832 16891 652 3590 23410 270 TSS 0.0727 892 03832 2.850 1100 3950 4.555 600 (a) Permnee uses ZJOC treatment pertormerce as primary baSIS lor operating WNfP (b) Calculated llSlng ElG corceraanon and Non-ELG waste streams lbw ((l Calcuateo using the following WoNTP 1J11C ueanren 

### pertcnrance veues for ELG.lNoo-ElG 

### eaocanons 51 3 % lor MO!l1tJIy AverEi!)E! 386 % forOalN Maxllflirn Note Best Professronai JudgmertllBPJj mass loalilng anocanons oeveooed constoenrc pemmee's process knowledge. wesesnearn 

### ctaractensics. and neaurem svstem pertormance as reateo \0 Increased flow from ooo-ElG wastesueems (Include fall1alj



### Since the permittee must operate its WWTP with a primary focus on achieving its effluent zinc discharge requirements, the treated effluent Outtall 001 zinc probability plots shown in Appendix R·3 were completed to establish applicable technology-based treatment. From the probability plots the following BPJ technoloqy-based Outfall 001 treated effluent zinc loadings were determined and used to develop the above summary:

95 %tile Monthly Average Zn Loading Value 

### = 12.0 Ib/day::: new permit monthly average 99 %tile Daily Maximum Zn Loading value e 

### 27.0 Ib/day::: new permit daily maximumNyrstar Clarksville, Inc. (Rationale) NPDES PermitTN0029157 Page R-24

APPENDIX R-S WATER QUALITY CONSIDERATIONS

The following procedure is used to calculate the allowable instream concentrations for passthrough guidelines and permit limitations.



### a. The most recent background conditions of the receiving stream segment are compiled. This information includes:

• 1010 of receiving stream (1,696 MGD, USGS) 30Q5 of receiving stream (2,302 MGD, USGS) 

### • Calcium hardness (124 mg/I) 

### • Total suspended solids (16 mg/l) • Background metals concentrations (upstream or Y2 water quality) • Other dischargers impacting this segment (none) Downstream water supplies, 

### if applicable



### b. The chronic water quality criteria are converted from total recoverable metal at lab conditions to dissolved lab conditions tor the following metals: cadmium, copper, trivalent 

### chromium, lead, nickel and zinc. Then translators are used to convert the dissolved lab conditions to total recoverable metal at ambient conditions.

c. The acute water quality criteria are converted from totat recoverable metal at lab conditions to dissolved lab conditions for the following metals: cadmium, copper, trivalent chromium, lead, nickel, zinc and silver. Then translators are used to convert the dissolved lab conditions to total recoverable metal at ambient conditions for the following metals: cadmium, copper, lead, nickel and silver.

d. The resulting allowable trivalent and hexavalent chromium concentrations are compared with the effluent values characterized as total chromium on permit applications. If reported total chromium exceeds an allowable trivalent or hexavalent chromium value, then the calculated value wiJl be applied in the permit for that form of chromium unless additional eHluent characterization is received to demonstrate reasonable potential does not exist to violate the applicable state water quality criteria for chromium.

e. A standard mass balance equation determines the total allowable concentration (permit limit) for each pollutant. This equation also includes a percent stream allocation of no more than 90%. The following formulas are used to evaluate water quality protection:
Cm:: QsCs 

### + QwCw 

## os s cw

### Nyrstar Clarksville, Inc. (Rationale) NPDES Permit TN0029157 Page R-25

where:

em .: resulling in-stream concentration after mixing



### Cw = 

### concentration of pollutant in wastewater Cs = 

### stream background concentration Ow = 

### wastewater flow Os = 

### stream low flow 

### to protect water qualffy:


### Cw 

## s IS.l [Cm IQs 

### + Qwl - QsCsl Qw
where (SA) ;s the percent "Stream Allocation". Calculations for this permit have been done using a standardized spreadsheet, titled "Water Quality Based Effluent Calculafions." Division policy dictates the following procedures in establishing these permit limits:

1. The critical low flow values are determined using USGS data: Fish and Aquatic Life Protection 7Q10 - Low flow under natural conditions 1010

- 

### Regulated low flow conditions Other than Fish and Aquatic Lite Protection 30Q5 - Low flow under natural conditions

2. Fish & 

### Aquatic Life water quality criteria for certain Metals are developed through application of hardness dependent equations. These criteria are combined with dissolved fraction methodologies in order to formulate the final effluent concentrations.

3. For criteria that are hardness dependent, chronic and acute concentrations are based on a Hardness of 25 mg/L and Total Suspended Solids (TSS) of 10 mg/L unless STORET or Water Supply intake data SUbstantiate a different value. Minimum and maximum limits on the hardness value used tor water quality calculations are 25 mg/L and 400 mg/L respectively. The minimum limit on the TSS value used for water quality calculations is 10 mglL.

4. Background concentrations are determined from the division database, results of sampling obtained from the permittee, and/or obtained from nearby stream sampling data. If this background data is not sufficient, one-half of the chronic 'In-stream Allowable" water quality criteria for fish and aquatic life is used. If the measured background concentration is greater than the chronic "In-stream Allowable" water qualitycriteria, then the measured background concentration is used in lieu of the chronic "lnstream Allowable" water quality criteria for the purpose of calculating the appropriate effluent limitation (Cw). Under these circumstances, and in the event the "stream allocation" is less than 100%, the calculated chronic effluent limitation for fish and aquatic life should be equal to the chronic "In-stream Allowable" water quality criteria. These guidelines should be strictly followed where the industria! source water is not the receiving stream. Where the industrial source water is the receiving stream, and the measured background concentration is greater than the chronic "In-stream Allowable"

### Nyrstar Clarksville, Inc. (Rationale) NPDES PermitTN0029157 Page R-26

water quality criteria, consideration may be given as to the degree to which the permittee should be required to meet the requirements of the water quality criteria in view of the nature and characteristics of the receiving stream.

The spreadsheet has fifteen (15) data columns, all of which may not be applicable to any particular characteristic constituent of the discharge. A description of each column is as follows:
Column 1: The "Stream Background" concentrations of the effluent characteristics.
Column 2: The "Chronic" Fish and Aquatic Lile Water Quality criteria. For cadmium, copper, trivalent chromium, lead, nickel, and zinc, this value represents the criteria for the dissolved form at laboratory conditions. The Criteria Continuous Concentration (CCG) is calculated using the equation:
GGG = 

### (exp ( me [ In (stream hardness)] 

### + be) ) (GGF)
CCF = Chronic Conversion Factor This equation and the appropriate coefficients for each metal are from Tennessee Rule 1200-4-3-.03 and the EPA guidance contained 

### in The Metals Translator: Guidance For Calculating A 

### Total Recoverable Permit Limit From a 

### Dissolved Criterion (EPA**823-6~96-007,** 

### June 1996). Values for other metals are in the total form and are not hardness dependent; no chronic criterion exists for silver. Published criteria are used for non-metal parameters.
Column 3:	 The "Acute" Fish and Aquatic Life Water Quality criteria. For cadmium, copper, trivalent chromium, lead, nickel, silver, and zinc, this value represents the criteria for the dissolved form at laboratory conditions. The Criteria Maximum Concentration (CMC) is calculated using the equation: GMG = (exp { m, [ In (stream hardness)] 

### + b,) ) (AGF)
ACF = Acute Conversion Factor Thts equation and the appropriate coefficients for each metal are from Tennessee Rule 1200-4-3-.03 and the EPA guidance contained in 

### The Metals Translator: Guidance For Calculating A 

### Total Recoverable Permit Limit From a 

### Dissolved Criterion (EPA 823-6-96-007, June 1996). Values for other metals are in the total form and are not hardness dependent. Published criteria are used for non-metal parameters.

### Nyrstar Clarksville, Inc. (Rationale) NPDES Permit TN0029157 Page R-27



### Column 4:	 The "Fraction Dissolved" converts the value for dissolved metal at laboratory conditions (columns 2 & 

### 3) to total recoverable metal at in-stream ambient conditions (columns 5 & 

### 6). This factor is calculated using the linear partition coefficients found in The Metals Translator; Guidance For Calculating 

### A Total Recoverable Permit Limit From 

### a Dissolved 

### Criterion (EPA 823·8-96-007, June 1996) and the equation:

1 

## c"., 1 + ( 

### [Kp.,1 [55""']**[lO~ll**


### ss = 

### in-stream suspended solids concentration [mgJ1J Linear partition coefficients for streams are used for unregulated (7Q10) recelvlnq waters, and linear partition coefficients for lakes are used for regulated (1Q10) receiving waters. For those parameters not in the dissolved form in columns 2 & 

### 3 (and all non-metal parameters), a Translator of 1 is used.
Column 5: The "Chronic" Fish and Aquatic Lite Water Quality criteria at in-stream ambient conditions. This criteria is calculated by dividing the value in column 2 by the value in column 4.
Column 6: The "Acute" Fish and Aquatic Life Water Quality criteria at in-stream ambient conditions. This criteria is calculated by dividing the value in column 3 by the value in column 4.
Column 7: The "Chronic" Calculated Effluent Concentration for the protection of fish and aquatic life. This is the chronic limit.
Column 8: The' Acute" Calculated Effluent Concentration for the protection of fish and aquatic life. This is the acute limit.
Column 9: The In-Stream Water Quality criteria for the protection of Human Health associated with the stream use classification of Organism Consumption (Recreation).


### Column 10: The In-Stream Water Quality criteria for the protection of Human Health associated with the stream use classification of Water and Organism Consumption. These criteria are only to be applied when the stream use classification for the receiving stream includes both**"Recreation~** 

### and "Domestic Water Supply."
Column 11: The In-Stream Water Quality criteria for the protection of Human Health associated with the stream use classification of Domestic Water Supply.
Column 12: The Calculated Consumption. Effluent Concentration associated with Organism

Column 13: The Calculated Effluent Concentration associated with Water and Organism Consumption.

### Nyrstar Clarksville. Inc. (Rationale) NPDES Permit TN0029157 Page R-28

Column 

### 14:	 The Calculated Effluent Concentration associated with Domestic Water Supply.

The calculated chronic water quality effluent concentrations from Column 7 should be compared, individually, to the values calculated in Columns 12, 13, and 14 in order to determine the most stringent chronic permit limitations. The calculated acute water quality effluent concentrations from Column 8 should then be compared, individually, to values equal to two (2) times the values presented in Columns 12, 13, and 14 in order to determine the most stringent acute permit limitations. These water quality based limits should then be compared to any technology based (CFR or Tennessee "Rules") effluent limitations, and/or any previous permit limitations. for final determination of the permit limits.Nyrstar Clarksville, Inc, (Rationale) NPDES Permit TN0029157 Page R·29


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...... _,· 

# ,-­ Nickel' SIMI,' Zinc' Me,c" ,. CII,aml"m II ChfOl\\l"m \II**Chroml~+Tl** Cyanldll II 

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..... TOC-I Phthalate. ChloriM (T, Req

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# I

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### Nyrstar Clarksville, Inc. (Rationale) NPDES Permit TN0029157 Page R-33



## Crude Zinc Oxide ICZO) Washwater's Receiving Stream Impact

Outtall 

### 001 Flow 

# o 62 mgd Receieinq Stream Flow 

### 1010 1,696 mgd 

### 3005 2,302 mod

CZO Washwater Characteristics Flow 

### (333% of Outfall 001) 

### 021 mgd Chlorides 

### 7,762 Ib1day Fluorides 

### 195 Ibldav
Limiting 

### Recerenq Stream Available Capacity 

### @ 1.696 mgd Chlorides

Acute critena" 

### 660 mgIL 

### 12,164,390 Iblday Chronic cnteria 

### "230 mgIL 

### 4,415,696 Iblday Fluondes (drinkinq water 

### "40 mail) 

### 76.795 Ibldav

Washwater's Percentage 

### Usage of 

### Receiving Stream's 

### Available Capacity Chlorides

Acute criteria 860 mgll 

### 006 % Chronic criteria = 

### 230 

### mgIL 

### 018 % Fluorides 

### 025 %Nyrstar Clarksville. Inc. (Rationale) NPDES Permit TN0029157 Page R·34



### APPENDIX R·6 NEW PERMIT LIMITS AND MONITORING REQUIREMENTS
Discharge Allocation Comparisons



### DETERMINAllON OF DISCHARGE L1MITAllONS Outfall 001
Monthly Averaae ELG!BPJ water Quality New EFFLUENT Perrmt I 

### CHARACTERISllC lib/day] lib/day] lib/day] TSS 

### 2.459 (a) 2,459 Cadmium (T) 

### 228 104 2.28 Copper 

## In 17 43 

### 605 17.43 Lead 

## In 372 85 3.72 

### 120 15,029 Zinc 

## In 12.0 Arsenic 

## In 1712 173 17.12 

# J Selenium 

### 245 249 24.9

Dailv Maximum

EFFLUENT ELGBPJ Water Quality New 

### Permit CHARACTERISllC lib/day] lib/day] lib/day] TsS Cadmium 

## In 4555 529 (a) 

### 86.6 4,555 5.29 Copper 

## IT) Lead 

## In 3387 741 950 865 33.87 

### 7.41 Zinc 

## In 270 15.895 27.0 Arsenic (T) 

### Selenium 

### 344:,**~54** 

### 173 216 34.45 216



## . (a) Narrative critena only

. (bj Pursuant to water quality reasonable potential calculations provided in Appendix R5 Note: Controlling values shown above as shaded cells.

### Nyrstar Clarksville, Inc. (Rationale) NPDES Permit TN0029157 Page R-35

New Permit Discharge Limits and Monitoring Requirements



# I PERMIT UIIITS I I 

### OUTFALL 001 TREATED PROCESS WASTEWATER

EFFLUEHT LIMITATIONS MONITORING 

## UONTIllY DAILY REQUIREMENTS EFFLUENT AVG.COIIC. A\IG,AUIf, lIAX. COliC. lIAX.AIIIT. MSRMIfT. SAMPU 

### CHARACTERISTIC rmgl) 

## _I 1mg,4J 

### -I fRQIICY. 

### TYPE 

### Flow 

### Reoort MGDI Reoort MGDl Continuous Recorder 

### Chloride, Total



### -- Reoort



# -- Reoort 1Week Composite 

### Fluoride, Total



### -­ Report



## -­ Report IlMonth Cornposns 

### Arsenic, Total



### -­ 17 12



## -­ 34 45 Semi-annual Comoosite 

### Cadmium, Total



### -­ 2.28



### -­ 529 2IMonth Cornocsite 

### CODDer, T ot.1 1743 JlB7 1/Quarter 

### Ccmocsrta Lead, Total



# -­ 372



### -­ 741 11Quartet 

### Composite Selenium, Total



### -­ 20



### -­ 216 Semi-annual Composite 

### Zinc, Total



### -­ 120 .­ 

### 270 1/VVeek Comoosrte 

### TSS 2459



### -­ 4555 

### ti2 Months Composite 

### Conductivity (umhos/em RepOrt



### -­ Report



### -­ 1rWeek Composite



### HIs.u.) Renee 6 0 ·90 (al tWeek Grab a) 

### pH anelvses shall 

### be De!formed within fifteen (15) minutes of samoe collection

### --

--

-- Nyrstar Clarksville, Inc. (Rationale) NPDES Permit TN0029157 Page R-36



### PERMIT REQUIREMENTS I I INTERNAL OUTFALL OIA CRUOE ZINC OXIDE WASHWATER

EFFLUENT LIMITATIONS MONITORING MOHTHLY RfQUIREMENTS EFFLUENT DAILY MSRMNT. SAIIPLE AVG.COMC. AVG.AMNT. IW.C<lIC. MAX. AMIIT. 

# _I

FRQNCY. CHARACTERI 

## snc TYP< I_I (lb/dayJ (mgIIl Recorder Chloride. Total Flow fMGDl Re 

### n Re ort Continuous

.. Grab Fluoride. Total Report Report 1NJeek

.. 1,Week Grab TSS Reoort Reoort Report VNeek Grab Conductivity tumbosrcm Reoort

.. Report Vlveek Grab H [s.u.] 

## 1'1**~rt** Reoort 1/Week Grab
13) pH anal ses shall be performed within fifteen 1151 minutes of samole couecuon Reoort



# C PERII'flIllTS 

# I

EFFLUENT CHARACTERISTIC flow pH Is.u.1**mlCO~C** 

### . (qn



## ,T**0~1** 

## Suspended SolidllTSSI

.**Seltleab~** 

## Solidslml'l)

..**To~1 Res~ual** **Chlorin~TRCllbl** .. .. 

## 40

..

.. .. 

## 05

..

, 

### .­ 

## o 019[a,

.. 

## OUTFAll 002 EFflUENT lJITA 110NS 1ION1IILY DAILY**AVG.CO~c.** 

### .l\'G. A.\l)1. 1lI1.\ID1. 

### (lltn 

## lI'ay) Report 

## IMGDI 

## llbiilll Report 

## [MGD)

Ra'9€dQ.90 (al 

## MONITORING REQUIREMENTS lISR.\N.**IRQ~n. CDnMuou~** 

1 

### Week 1Vieek 1iWeek 1**~NEek** tt\lPU 

### mE 

### Recarder



## Grab i**Gra~** 

## Grab Grab I 

### ,ai pH**3~C** 

# me**ilnai,5~S** 

### shall 

## te**~!ormed \i'~hln**  

### fift€p ,:151 mmjl.tS of**5a'Jll~ col~tJon**  it!**~he** 

### c<ceptatle metriC*. 

### for analrslS QITR.C**~re** 

### any 'Tletr1OdS**~pet;,lfr<:o:J** 1'1 

### T rtle 

### 40 CFR Par113{) 

### as amemed Ire rnelhoo deteclJon ievei I,IOLI for 

### TRC snal, 1): 

### met'iliJ ilS mg'l unless lrte perrnilte€ 

### dfmdlstra1t5 

### na**~.s** 

### MOL 

### IS hgrer Trte perml!lee shall re(alfl Ire t':Jinema1.10r lba 

### /JStf f5 re**h~her** 

### MOLand lave**aI"31,;a~e** 

### lor reView upon**rE<:1~L** ip 

### cases**~tlere** 

### the**perm~** 

### limit 

### Siess**·.~3t** 

### 'te**~JDL** 

### :he repor1ng or 

# me ajess lnan !II€' 

### fJ D shall 

### be Interpreltllio**cOlSl~ule cOf11\l~ance**  

### wllh 

### :he perrnd I,'md 

### The complianet point forlotall1Sidual chlorine is.n the confluence of 

### !hi discharve and the recei'ving stream,Nyrstar Clarksville, Inc. (Rationale) NPDES Permit TN0029157 Page R-37

PERIIT BENCHllARKlCUTOFF DtSCHARGE VALUES OUTFAlLS SW3.nd Sw.t StllrmWlttr Runoff, Steam Condenutt Ind MiscelllnltOltI Non-PrClCeN Wltlr

, 

## _TORING EFFlUENTBENC_UTOFFVALUES

IIOIIMY DALY REQUIlEJIENTS EFFLUENT CHARACTERlSllC AVe;. CO:«:. 

### ,.;;n AVG. Am'T. 

# """'" MAX. CONe. 1ll.-u'AMNT. 

# ._'" I 

# _I

""""'"T.**J1lQ~cY.** IA.'EPU nl'[ Flow Report (MGDI Reporl (MGD) 1 ouaner Esnrrate pH (s.u.) 

### tal 50-90 50·90 t'uuaner Grab Total Suspended**Solid~** (TSS)

.. - 150



### - 1 Quarter Grab Cadmium, Total

- 00159

- 1!Qual1er Oreb Copper, Total

.. 00036

- tqraner Grab lead, Total

.. 0150

.. t-Ouarter Grab Zinc, Total 0395 , ouster Grall
PERIIIT BENCHIIARKICUTOFF DtSCHARGE VALUES OUTFALL SW5 Siormwate, Runoff _l1lRIIlG efFLUENT BENCHIIARKICUTOFF VALUES

IIOII1HLY REQUIREllENTS 

## I EFFLUENT DALY AVG. cosc, I A\'G. AWt'T. MAX.COSC. :H..U- AlL'\T. M5R.IDT. mlPU

, 

# ,

# .... CHARAClERISTIC**JRQ~C\".** n

... 

# ,-'" 

# _I

Flow Report (MGD) 

# ""­ Report (MGDl Sem,-annuaMy Esnrnate pH (s.U.lII) Sem-amejv 50 90 Grab Total Sus ndad Solids TSS 150 5em·i1ntlwlIv Grab cadmium Total

.. 00159 Serl1l·annualt\' Grab**~Total** 0,063& .' Serl1l-annualv Grab lead, Total 0150 SemI-amualy



### - Grab ,Zinc, Total 0.395 Grab pH enaeses sI'lill be performed WIthin fifteen (15) ml!'lUles of sample collection 5em.aooually 

### "I Nore The petmnee ;,hall provide jne date and IiJrabon (inhours) of the QlJahlYlllq stem evenusysampleo rainfall measurements or esneeres (in mcresjctme s100n event thai generated the sampled 

### nncn ne duration between the scm event sample-d and the end of !he prevous measurable (grealer ltlan01 rnell ramlall) storm event and an estimate (If me lotal volume otme**di~arge** sampled Flow shall be reported in Millon Gallons per Day (MGD)

GI,lOa
HI0029157.doc