# Part 70 Air Quality Permit

Alcoa Mt. Holly (operating as Alumax of South Carolina) Highw ay 52 North Goose Creek, South Carolina 29445 ( p er m it r e vised 1/30/03, see page 2 for details)



### In accordance with the provisions of the Pollution Control Act, Sections 48-1-50(5) and 48-1-110(a), and the 1976 Code of Laws of South Carolina, as am ended, Regulation 61-62, the above nam e d
perm ittee is hereby granted perm ission to discharge air contam inants into the am bient air. The Bureau of Air Quality authorizes the operation of this f acility and its applicable equipm ent specif i ed herein in accordance with the plans, specifications and other inform ation subm itted in the Title V
perm it application dated January 15, 1996 and subsequent subm ittals.

This perm it is subject to and conditioned upon the term s, lim itations, standards, and schedules contained in or specified on the 45 pages, with the accom p anying attachm e nts, of this perm it.

Permit Number: TV-0420-0015 Effective Date: October 1, 2001 Issue Date: August 20, 2001 Expiration Date: September 30, 2004

Director, Engineering Services Division Bureau of Air Quality

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### RECORD OF REVISIONS

Revision Number Final Revision

Date Type of Revision (AA, 502(b)(10), MM, SM) Description of Change (Specific Parts, Sections, and Tables Revised or Added)

1 1/30/03 AA Re-issue of permit to incorporate Construction Permit 0420-0015-CR and other administrative changes in Parts 5.0, 6.0, 7.0, and Attachment A

AA = Administrative Amendment 502(b)(10) = Operational Flexibility MM = Minor Modification SM = Significant Modification



### Send copies of all revisions to Permit File, Main File, District EQC Office, US EPA, and Facility Contact.

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### TABLE OF CONTENTS

Part 1.0 GENERAL INFORMATION

A. Applicable Permit Dates B. Facility Information C. Facility Address D. Facility Billing Address

Part 2.0 APPLICABILITY

Part 3.0 GENERAL CONDITIONS

A. Permit Issuance B. Permit Expiration and Renewal C. Severability D. Fee Assessment and Payment E. Submittal of Information F. Public Participation G. Permit Reopening H. Temporary Sources I. Emergency Provisions J. Property Rights K. Economic Incentives, Marketable Permits, Emission Trading L. Title IV Sources M. Administrative Permit Amendments N. Minor Permit Modifications O. Significant Modification Procedures P. Duty to Comply Q. Inspection and Entry R. Compliance Requirements S. Schedule of Compliance T. Need to Halt or Reduce Activity Not a Defense U. Operational Flexibility

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### Part 4.0 FACILITY WIDE REQUIREMENTS

A. Emissions Limits and Standards B. Facility Wide Conditions

Part 5.0 EMISSION UNIT REQUIREMENTS

A. Emission Unit Description B. Control Devices Description C. Equipment Description D. Emissions Limits and Standards E. Emission Unit Conditions

Part 6.0 MONITORING AND REPORTING REQUIREMENTS

A. Monitoring and Reporting B. Monitoring and Reporting Conditions

Part 7.0 ADDITIONAL CONDITIONS

A. Specific Conditions B. Operational Flexibility C. Compliance Schedule D. Permit Shield

ATTACHMENT A - Modeled Emission Rates ATTACHMENT B - Insignificant Activities ATTACHMENT C - Applicable and Non-applicable Federal and State Regulations

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### PART 1.0 GENERAL INFORMATION

A. APPLICABLE PERMIT DATES

ISSUE DATE: August 20, 2001 EFFECTIVE DATE: October 1, 2001 EXPIRATION DATE: September 30, 2004

RENEWAL APPLICATION DUE: March 31, 2004

B. FACILITY INFORMATION

ENVIRONMENTAL CONTACT: Randy Pulley CONTACT TELEPHONE NUMBER: 843-572-5294 INTERNET E-MAIL ADDRESS: randy.pulley@alcoa.com FACILITY LOCATION: Highway 52 North - Goose Creek COUNTY: Berkeley SIC CODE: 3334 AFS CODE: 4501500015

C. FACILITY ADDRESS

FACILITY NAME: Alcoa Mt. Holly (operating as Alumax of South Carolina) 

### ADDRESS: PO Box 1000 CITY, STATE, ZIP: Goose Creek, SC 29445

D. FACILITY BILLING ADDRESS

FACILITY BILLING NAME: Alcoa Mt. Holly ADDRESS: PO Box 1000 CITY, STATE, ZIP: Goose Creek, SC 29445

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### PART 2.0 APPLICABILITY [SC Regulation 61-62.70.3(a)]

The following sources are subject to permitting requirements of Part 70:

1. Any major source;

2. Any source, including an area source, s ubject to a standard, limitation, or other requirement under Section 111 of the Clean Air Act (Act);

3. Any source, including an area source, subject to a standard or other requirement under Section 112 of the Act, except that a source is not required to obtain a permit solely because it is subject to regulations or requirements under Section 112(r) of the Act;

4. Any affected source under the Title IV Acid Rain Program;

5. Any source in a source category designa ted by the Administrator of the US Environmental Protection Agency (US EPA)(A dministrator) pursuant to this Section; and

6. Any source listed in SC Regulation 61-62.70.3(a) that is exempt from the requirement to obtain a permit under SC Regulation 61-62.70.3(b) may opt to apply for a permit under this Part 70 program.

The following source categories are exempted from th e obligation to obtain a Part 70 permit, but are not exempted from other SC Department of Health and Environmental Contro l (Department) and US EPA requirements [SC Regulation 61-62.70.3(b)(4)]:

1. All sources and source categories that w ould be required to obtain a permit solely because they are subject to 40 CFR 60, S ubpart AAA - Standards of Performance for New Residential Wood Heaters; and

2. All sources and source categories that w ould be required to obtain a permit solely because they are subject to 40 CFR 61, S ubpart M - National Emission Standard for Hazardous Air Pollutants for Asbestos, Section 61.145, Standard for Demolition and Renovation.

Any person that operates or proposes to operate a particular source or installation may submit a request in writing that the Department make a dete rmination as to whether a particular source or installation is subject to the permit requirements of this regulation. The request must contain such information as is believed sufficient for the Depa rtment to make the requested determination. [SC Regulation 61-62.70.3(e)]

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### PART 3.0 GENERAL CONDITIONS

This section describes conditions and provisions app licable to all Part 70 sources. Specific source category conditions and requirements are contained in Part 5.0 of this permit. (Revised 05/21/99)



### A. PERMIT ISSUANCE [SC Regulation 61-62.70.7(a)(1)]

A permit, permit modification, or renewal may be i ssued only if the following conditions have been
met:

1. The Department has received a complete application for a permit, permit modification, or permit renewal;

2. Except for modifications qualifying for mi nor permit modification procedures under SC Regulation 61-62.70.7(e)(2) and (3), the Department has complied with the requirements for public participation under SC Regulation 61-62.70.7(h);

3. The Department has complied with the requirements for notifying and responding to affected States under SC Regulation 61-62.70.8(b);

4. The conditions of the permit provide for co mpliance with all applicable requirements and the requirements of Part 70; and

5. The Administrator has received a copy of the proposed permit and any notices required under SC Regulation 61-62.70.8(a) and (b ), and has not objected to issuance of the permit under SC Regulation 61-62.70.8(c) within the required time frame.

A Title V operating permit does not excuse any facility from the preconstruction permitting requirements under SC Regulation 61-62.1.

B. PERMIT EXPIRATION AND RENEWAL [SC Regulation 61-62.70.7(c)] (Revised 11/13/98)


### Permit expiration terminates the source’s right to operate unless a timely and complete renewal application has been submitted consistent with SC Regulation 61-62.70.5(a)(1)(iii), 61- 62.70.5(a)(2)(iv), and 61-62.70.7(b). In this case, th e permit shall not expire until the renewal permit has been issued or denied . All terms and conditions of the permit including any permit shield that may be granted pursuant to SC Regulation 61- 62.70.6(f) shall remain in effect until the renewal permit has been issued or denied.

Permits being renewed are subject to the same pr ocedural requirements, including those for public participation, affected State and US EPA review, that apply to initial permit issuance.

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### C. SEVERABILITY [SC Regulation 61-62.70.6(a)(5)]

The provisions of this permit are severable, and if any provision of this permit, or application of any provision of this permit to any circumstance is he ld invalid, the application of such provision to other circumstances, and the remainder of this permit shall not be affected thereby.

D. FEE ASSESSMENT AND PAYMENT [SC Regulation 61-62.70.6(a)(7)]

The owners or operators of Part 70 sources shall pa y fees to the Department consistent with the fee schedule approved pursuant to South Carolina Regulation 61-62.70.9.

E. SUBMITTAL OF INFORMATION [SC Regulation 61-62.70.6(a)(6)(v)]

The permittee shall furnish to the Department, with in a reasonable time, any information that the Department may request, in writing, to determin e whether cause exists for modifying, revoking, reissuing, or terminating the permit or to determ ine compliance with the permit. Upon request, the permittee shall also furnish to the Department copies of records required to be kept by the permit or, for information claimed to be confidential, the permittee may furnish such records directly to the Administrator along with a claim of confidentiality. The Department may also request that the permittee furnish such records directly to the Ad ministrator along with a claim of confidentiality.

F. PUBLIC PARTICIPATION [SC Regulation 61-62.70.7(h)]

Except for modifications qualifying for minor permit modification procedures, all permit proceedings, including initial permit issuance, signifi cant modifications, and renewals, shall provide adequate procedures for public notice including offering an opportunity for public comment and hearing on the draft permit. These procedures shall meet all requirements of SC Regulation 61- 62.70.7(h).

G. PERMIT REOPENING [SC Regulation 61-62.70.7(f)] (Revised 05/21/99)


### This permit shall be reopened and revised under any of the following circumstances:

1. Additional applicable requirements under the Act become applicable to a major Part 70 source for which three or more years remain on the original term of the permit. Such revisions shall be made not late r than eighteen (18) months following promulgation of relevant standards or re gulations unless the regulation specifically provides for a longer compliance period. No such reopening is required if the effective date of the requirement is later than the date on which the permit is due to expire, unless the original permit or any of its terms and conditions has been extended pursuant to SC Regulation 61-62.70.7(c)(1)(ii).

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### 2. Additional requirements, including excess emission requirements, become applicable to an affected source under the acid rain program. Excess emissions offset plans shall be deemed to be incorporated into this permit upon approval by the Administrator.

3. The Department or EPA determines that the permit contains a material mistake or that inaccurate statements were made in establishing the emissions standards or other terms or conditions of the permit.

4. The Administrator or the Department determines that the permit must be revised or revoked to assure compliance with the applicable requirements.

In addition, the permit may be m odified, revoked, reopened, and reissued, or terminated for cause by the Department. The filing of a request by the permittee for a permit modification, revocation and reissuance, or termination, or of a notification of planned changes or anticipated noncompliance does not stay any permit condition. [SC Regulation 61-62.70.6(a)(6)(iii)]

Proceedings to reopen and issue a permit shall follow the same procedures as apply to initial permit issuance and shall affect only those parts of the permit for which cause to reopen exists. Such reopenings shall be as expeditious as practicable. Reopenings shall not be initiated before a notice of such intent is provided to the Part 70 source by the Department at least thirty (30) days in advance of the date that the permit is to be reopened, except that the Department may provide a shorter time period in the case of an emergency.

H. TEMPORARY SOURCES [SC Regulation 61-62.70.6(e)]

In accordance with SC Regulation 61-62.70.6(e), the Department may issue a single permit authorizing emissions from similar operations by the same source owner or operator at multiple temporary locations. The operation must be tempor ary and involve at least one change in location during the term of the permit. No sources subject to Title IV of the Ac t shall be permitted as a temporary source.

I. EMERGENCY PROVISIONS [SC Regulation 61-62.70.6(g)(3)] (Revised 05/21/99)


### In the case of an emergency, as defined in SC Regulation 61-62.70.6(g), the permittee shall verify an affirmative defense of emergency through properly signed, contemporaneous operating logs, or other relevant evidence that: 1. An emergency occurred and that the pe rmittee can identify the cause(s) of the
emergency;
2. The permitted facility was at the time being properly operated; and

3. During the period of the emergency th e permittee took all reasonable steps to minimize levels of emissions that exceed ed the emission standards, or other

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### requirements in the permit.

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### Additionally, the permittee shall submit verbal notif ication of the emergency to the Department within twenty-four (24) hours of the time when emission limitations were exceeded, followed by written notifications within thirty (30) days. Th is notice fulfills the requirement of SC Regulation 61-62.70.6(a)(3)(iii)(B). This notice must contain a description of the emergency, any steps taken to mitigate emissions, and corrective actions taken.

This provision is in addition to any emergency or upset provision contained in any applicable requirement. In any enforcement proceeding, the permittee seeking to establish the occurrence of an emergency has the burden of proof.

J. PROPERTY RIGHTS [SC Regulation 61-62.70.6(a)(6)(iv)]

This permit does not convey any property rights of any sort, or any exclusive privilege.

K. ECONOMIC INCENTIVES, MARKETA BLE PERMITS, EMISSION TRADING [SC Regulation 61-62.70.6(a)(8)]

No permit revision shall be required, under any a pproved economic incentives , marketable permits, emissions trading and other similar programs or pro cesses for changes that are provided for in this permit.

L. TITLE IV SOURCES [SC Regulation 61-62.70.6(a)(4)]

The permittee is prohibited from em issions exceeding any allowances that the source lawfully holds under Title IV of the Act or the regulations promulgated thereunder. No permit revision shall be required for increases in emissions that are aut horized by allowances acquired pursuant to the acid rain program, provided that such increases do not require a permit revision under any other applicable requirement. No limit shall be placed on the number of allowances held by a source. The source may not, however, use allowances as a defense for noncompliance with any other applicable requirement. Any such allowances shall be accounted for according to the procedures established in regulations promulgated under Title IV of the Act. Where an applicable requirement of the Act is mo re stringent than an applicable requirement of regulations promulgated under Title IV of the Act, both provisions shall be incorporated into the permit and shall be enforceable by the Administrator. [SC Regulation 61-62.70.6(a)(1)(ii)]

M. ADMINISTRATIVE PERMIT AMENDMENTS [SC Regulation 61-62.70.7(d)(3)]

An administrative permit amendment as defined in SC Regulation 61-62.70.7(d) can be made by the Department consistent with the following:

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### 1. The Department shall take no more than sixt y (60) days from receipt of a request for an administrative permit amendment to take final action on such request, and may incorporate such changes without providing notice to the public or affected States provided that it designates any such permit revisions as having been made pursuant to this paragraph.

2. The Department shall submit a copy of the revised permit to the Administrator.

3. The source may implement the changes addressed in the request for an administrative amendment immediately upon submittal of the request, except transfer/ownership which must comply with SC Regulation 61-62.1, Section II(E).

N. MINOR PERMIT MODIFICATIONS [SC Regulation 61-62.70.7(e)(2)]

Minor permit modifications can be made by the Department in accordance with SC Regulation 61- 62.70.7(e)(2)(i). An application requesting the use of minor permit modification procedures shall meet the requirements of SC Regulation 61-62.70.5(c) and shall include items as specified in SC Regulation 61-62.70.7(e)(2)(ii).

The Department may modify the procedure outlin ed in SC Regulation 61-62.70.7(e)(2) to process groups of a source’s applications for certain modi fications eligible for minor permit modification processing. Group processing of minor permit a pplications will proceed as outlined in SC Regulation 61-62.70.7(e)(3).

O. SIGNIFICANT MODIFICATION PROCEDURES [SC Regulation 61-62.70.7(e)(4)]

Significant permit modification procedures shall be used for applications requesting permit modifications listed in SC Regulation 61-62.70.7(e)(4 )(i). Significant permit modifications shall meet all requirements of this Part 70, including t hose for applications, public participation, review by affected States, and review by EPA, as they apply to permit issuance and permit renewal.

P. DUTY TO COMPLY [SC Regulation 61-62.70.6(a)(6)(i)]

The permittee must comply with all of the cond itions of this permit. Any permit noncompliance constitutes a violation of the SC Pollution Contro l Act and/or the Federal Clean Air Act and is grounds for enforcement action; for permit terminati on, revocation and reissuance, or modification; or for denial of permit renewal application.

Q. INSPECTION AND ENTRY [SC Regulation 61-62.70.6(c)(2)]

Upon presentation of credentials a nd other documents as may be required by law, the permittee shall allow the Department or an authorized representative to perform the following:

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### 1. Enter upon the permittee’s premises where a Part 70 source is located or emissionsrelated activity is conducted, or where reco rds must be kept under the conditions of the permit.

2. Have access to and copy, at reasonable times, any records that must be kept under the conditions of the permit.

3. Inspect any facilities, equipment (including monitoring and air pollution control equipment), practices, or operations regulated or required under this permit.

4. As authorized by the Act and/or the SC Po llution Control Act, sample or monitor at reasonable times substances or parameters for the purpose of assuring compliance with the permit or applicable requirements.

R. COMPLIANCE REQUIREMENTS [SC Regulation 61-62.70.6(c)(5)] (Revised 05/21/99)


### Consistent with SC Regulation 61-62.70.6(a)(3), th is permit contains compliance certification, testing, monitoring, reporting, and record keeping requirements sufficient to assure compliance with the terms and conditions of this permit. A ny document (including reports) shall contain a certification by a responsible official or designee that meets the requirements of SC Regulation 61- 62.70.5(d).

The responsible official or designee shall certify, annually, compliance with the conditions of this permit. The compliance certification shall include the following:

1. The identification of each term or conditi on of the permit that is the basis of the certification.

2. The identification of the methods or m eans used for determining the compliance status with each term and condition during the certification period, and whether such methods or means provide continuous or intermittent data.

3. The status of compliance with the terms and conditions of the permit for the period covered by the certification.

4. Such other facts as the Department may re quire to determine the compliance status of the source.

5. All compliance certifications shall be submitte d to the Administrator as well as to the Department.

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### The annual compliance certification shall be sent to the Environmental Protection Agency (EPA) and the South Carolina Department of Health and Environmental Control - Bureau of Air Quality (SC DHEC - BAQ) at the following addresses:

US EPA, Region 4 SC DHEC - BAQ Air Enforcement Branch Technical Management Section 61 Forsyth Street 2600 Bull Street Atlanta, GA 30303 Columbia, SC 29201

S. SCHEDULE OF COMPLIANCE [SC Regulation 61-62.70.5(c)(8)] (Revised 5/21/99)


### The permittee shall submit a compliance schedule that contains the following for all Part 70 sources that are not in compliance with all applicable rules:

1. A description of the source’s compliance status and where appr opriate a compliance schedule with respect to all applicable requirements as follows:

(a) For applicable requirements with which the source is in compliance, a statement that during the pe rmit term the source will continue to comply with such requirements.

(b) For applicable requirements that will become effective during the permit term, a statement that the source w ill meet such requirements on a timely basis, unless a more detailed schedule is expressly required by the applicable requirement.

(c) A schedule of compliance for sources that are not in compliance with all applicable requirements at the time of permit issuance. This schedule shall include a narrative description of how the source will achieve compliance, a schedule of remedial measures, includi ng an enforceable sequence of actions with milestones, leading to compliance with all applicable requirements. This compliance schedule shall be at leas t as stringent as that contained in any judicial consent decree or administ rative order to which the source is subject. Any such schedule of complian ce shall be supplemental to, and shall not sanction noncompliance with, the applicable requirements on which it is based.

2. A schedule for submission of certified progr ess reports no less fre quently than every six (6) months for sources required to have a schedule of compliance to remedy a violation. Progress reports shall meet the requirements of SC Regulation 61- 62.70.6(c)(4)(i) and (ii).

3. The compliance plan content requirements sp ecified in this paragraph shall apply and be included in the acid rain portion of a compliance plan for an affected source, except as specifically superseded by regula tions promulgated under Title IV of the act with regard to the schedule and me thod(s) the source will use to achieve

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### compliance with acid rain emissions limitations.

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### T. NEED TO HALT OR REDUCE ACTIVITY NOT A DEFENSE [SC Regulation 61- 62.70.6(a)(6)(ii)]

It shall not be a defense for a 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.

U. OPERATIONAL FLEXIBILITY [SC Regulation 61-62.70.7(e)(5)]

In accordance with SC Regulation 61-62.70.7(e)(5), a permitted facility is authorized to make changes within their facility without requiring a pe rmit revision, if the changes are not modifications under Title I of the Act and the changes do not ex ceed the emissions allowable under this permit. The permitted facility shall provide the Administrator and the Department written notification as required by SC Regulation 61-62.70.7(e)(5) at least seven (7) days prior to such changes.

PART 4.0 FACILITY WIDE REQUIREMENTS

A. EMISSIONS LIMITS AND STANDARDS

Table 4.1 contains summaries of facility wide emission limits and standards.

TABLE 4.1 EMISSION LIMITS AND STANDARDS

Pollutant Limit/Standard Regulation State Only Requirement Condition Number State New Source Review As Specified in Attachment A SC Regulation 61- 62.1, Section II (A) Yes 4.B.3

Toxic Air Pollutants As Specified in Attachment A SC Regulation 61- 62.5, Std No. 8 Yes 4.B.3

Hazardous Air Pollution Comply with Regulation SC Regulation 61-62.4 No N/A

Open Burning Comply With Regulation SC Regulation 61-62.2 No N/A Fugitive Emissions Comply With Regulation SC Regulation 61- 62.6, Sec III No N/A Ozone Depleting Substances * 40 CFR Part 82, Subpart F No 4.B.7

Asbestos * 40 CFR Part 61.145 No 4.B.8 N/A = Not Applicable * Specific To Subpart



### The maximum allowable emission limits above are derived from the various Federal and State regulations that govern the operation of this type of facility. All applicab le facility wide emission limits and corresponding regulations are listed above . Additional operating requirements which may

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### be more stringent than those above are contained in Part 5.0, Part 6.0, and Part 7.0 of this permit.

B. FACILITY WIDE CONDITIONS (Revised 11/13/98)

Condition Number Condition

1. In accordance with SC Regulation 61-62.1, Section II, the permittee must comply with all applicable statutes and regulations of the United States and the State of South Carolina. This permit does not relieve the permittee from compliance with applicable local laws, ordinances, and regulations.

2. Air dispersion modeling (or other method) has dem onstrated that this facility’s operation will not interfere with the attainment and maintenance of any state or federal standard. Any changes in the parameters used in the air dispersion modeling ma y require a review by the facility to determine continuing compliance with these standards. These potential changes include any decrease in stack height, decrease in stack velocity, increase in st ack diameter, decrease in stack exit temperature, increase in building height or building additions, increase in emission rates, decrease in distance between stack and property line, changes in vertical stack orientation, and installation of a rain cap that impedes vertical flow. Parameters that are not required in the determination will not invalidate the demonstration if they are modified. The emission rates used in the determination are listed in Attachment A of this permit. Higher emission rates may be administratively incorporated into Attachment A of this permit provided a demonstration using these higher emission rates shows the attainment and maintenance of any state or federal standard or with any other applicable requirement. Variations from the input parameters in the demonstration shall not constitute a violation unless the maximum allowable ambient concentrations identified in the standard are exceeded.

3. The owner/operator shall maintain this facility in co mpliance with the pollutant limitations in Part 4, Part 5, Part 6, Part 7, and/or the emission rates as listed in Attachment A of this Part 70 operating permit, whichever is more restric tive. This is a State Only enforceable requirement. Should the facility wish to increase the emission rates listed in Attachment A, it may do so by the administrative process specified in condition 4.B.2

4. A list of equipment which are considered insigni ficant pursuant to SC Regulation 61-62.70.5(c) has been submitted with your Title V application and re viewed by our staff. The list, including source descriptions and citation for exemption, is summarized in Attachment B of the permit. Attachment B excludes those activities identified in Part A of the insignificant activities list. Written notification to the Bureau of Air Quality is required for the addition of any new equipment which may meet the definition of insignificant or exempt as described above, excluding those sources listed in Part A of the insignificant activities list.

(Revised 11/13/98)

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Condition Number Condition

5. In accordance with SC Regulation 61-62.1 Section II, (C)(3), for all sources not required to have continuous emissions monitors, in the event of any malfunction of air pollution control equipment or system, process upset or other equipment failure wh ich results in discharges of air contaminants lasting for one hour or more and which are great er than those discharges described for normal operation in the permit application shall be repor ted to the local Environmental Quality Control (EQC) District office within twenty-four (24) hours after the beginning of the occurrence. The permittee shall also submit a written report within thirty (30) days of the occurrence. This report shall be submitted to the Manager of the Technical Mana gement Section, Bureau of Air Quality (BAQ). The report shall contain as a minimum, the following: the identity of the emission unit and associated equipment where excess emissions occurred, th e magnitude of excess emissions, the time and duration of excess emissions, the steps taken to re medy the malfunction and to prevent a recurrence, documentation that control equipment and processes we re at all times maintained and operated, to the maximum extent practicable, in a manner that was consistent with good practice for minimizing emissions. Such a report shall in no way serve to ex cuse, otherwise justify, or in any manner affect any potential liability or enforcement action resulting from the occurrence. This defines the Department’s definition of prompt in its relati on to the degree of reporting as specified by SC Regulation 61-62.70.6(a)(3)(iii)(b).

6. In accordance with SC Regulation 61-62.1, Section III an emissions inventory will be completed for the previous calendar year and submitted by March 31 of every even calendar year to the Department. The above requirement notwithstanding, an emissions inventory may be required at any time in order to determine the compliance status of any facility.

7. The permittee shall comply with the standards for recycling and emissions reduction pursuant to 40 CFR Part 82, Subpart F, Protection of Stratos pheric Ozone, Recycling and Emissions Reduction, except as provided for motor vehicle air conditi oners (MVACs) in Subpart B. If the permittee performs a service on motor (fleet) vehicles that involves ozone-depleting substance refrigerant in MVACs, the permittee is subject to all applicab le requirements of 40 CFR Part 82, Subpart B, Servicing of MVACs.

8. The permittee shall comply with the standards of performance for asbestos abatement operations pursuant to 40 CFR Part 61.145 and SC Regula tion 61-86.1, including, but not limited to, requirements governing training, licensing, notifi cation, work practice, cleanup, and disposal.



### PART 5.0 EMISSION UNIT REQUIREMENTS

A. EMISSION UNIT DESCRIPTION

Table 5.1 is a description of emission units located at this facility.

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### TABLE 5.1 EMISSION UNITS
Unit ID Unit Description Control Device Description

01 Green Carbon Plant (12) Baghouses, (1) Scrubber

02 Baked Carbon Plant (4) Baghouses, (1) Scrubber/Baghouse System 03 Anode Rodding (8) Baghouses

04 Potlines (19) Baghouses, (4) Scrubber/Baghouse Systems 05 Pot Repair Baghouse System 06 Cast House (4) Baghouses N/A = Not Applicable



### B. CONTROL DEVICE DESCRIPTION

Table 5.2 is a description of control devices located at this facility.

TABLE 5.2 CONTROL DEVICES

Control Device ID Stack ID Control Device Description Installation Date Pollutant(s) Controlled Efficiency Capture (Removal)
ID 01 - GREEN CARBON PLANT

50058 12 2,200 cfm Dust Collector for Coke Unloading Station (252 DC-2) 1979 PM 0.005 grains/cf

50020 11 3,600 cfm Dust Collector for Coke Storage Tanks #1, #2, and Fluid Coke Storage Tank (252A DC-1) 1979/1994 PM 0.005 grains/cf

50012 19 11,735 cfm Dust collector for Coke Crushing System (254 DC-1) 1979 PM 0.005 grains/cf

50013 15 2,020 cfm Dust Collector for Butts Classifier System (254 DC-2) 1979 PM 0.005 grains/cf

50014 13 4,065 cfm Dust Collector for Classifier Material Handling System (254 DC-3) 1979 PM 0.005 grains/cf

50015 16 5,805 cfm Dust Collector for Storage Reclaim System (254 DC-4) 1979 PM 0.005 grains/cf

50016 18 4,055 cfm Dust Collector for Aggregate Blending System (254 DC-5) 1979 PM 0.005 grains/cf

50005 14 3,200 cfm Dust Collector for Ball Mill Classifying System (254 DC-6) 1979/1993 PM 0.005 grains/cf

50006 17 1,000 cfm Dust Collector for Intermediate Classifying System (254 DC-7) 1979 PM 0.005 grains/cf

50057 10 10,700 cfm Dust Collector for Secondary Butt Crushing System (254 DC-8) 1979 PM 0.005 grains/cf

50056 09 10,000 cfm Dust Collector for Butts Storage Tank #1 and #2 (254Y DC-9) 1979/1996 PM 0.005 grains/cf

50051 20 600 cfm Dust Collector for Fines Recovery System (254 DC-10) 1982 PM 0.005 grains/cf 50054 85 Scrubber for Anode Forming Process 1992 POM N/A ID 02 - BAKED CARBON PLANT

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 21 OF 45 (permit revised 1/30/03, see page 2 for details)

Control Device ID Stack ID Control Device Description Installation Date Pollutant(s) Controlled Efficiency Capture (Removal)

53001 01 Dry Scrubber System/Baghouse for North and South Bake Ovens (alumina used as scrubbing media) 1979 Fluorides PM N/A

50023 08 5,200 cfm Dust Collector for Anode Block Cleaning and Material Transfer Operations 261 DC-1 1979/1995 PM 0.005 grains/cf

50024 06 4,100 cfm Dust Collector for Fresh Alumina Storage and Transfer 261G DC-1 1979/1993 PM 0.005 grains/cf

50025 07 800 cfm Dust Collector for Fluoride Enriched Alumina Storage and Transfer 261G DC-2 1979 PM 0.005 grains/cf

89054 100 1,080 cfm Housekeeping Dust Collector 261 DC-2 1986 PM 0.005 grains/cf ID 03 - ANODE RODDING

50007 24 10,000 cfm Dust Collector for the Butt Blasting System 232 DC-3 1979 PM 0.005 grains/cf

50008 22 21,970 cfm Dust Collector for the Butt Crushing Operations 232H DC-1 1979 PM 0.005 grains/cf

50059 23 8,350 cfm Dust Collector for the Rod and Stub Blasting System 232 DC-2 1979 PM 0.005 grains/cf

50064 26 600 cfm Dust Collector for the Butt Blast Discharge and Truck Loading Station 232 DC-5 1979 PM 0.005 grains/cf

50050 27 7,000 cfm Dust Collector for the Anode Eye Cleaner System 232 DC-6 1979 PM 0.005 grains/cf

50010 25 4,200 cfm Dust Collector for the 3 Induction Furnaces 232 DC-4 1979 PM 0.005 grains/cf

50055 101 700 cfm Dust Collector for the Cathode Collector Bar Cleaner 232 DC-7 1984/1996 PM 0.005 grains/cf

89055 125 Anode Hole Cleaner Vacuum Exhaust 232 DC-8 1992 PM 0.005 grains/cf ID 04 - POTLINES

50053 29 15,600 cfm Dust Collector for Track Hopper 140 DC-1 1980/1985 PM 0.005 grains/cf

50026 28 6,300 cfm Dust Collector for Screening Tower 140 DC-2 1980 PM 0.005 grains/cf

50029 32 6,250 cfm Dust Collector for “Lift Tower” - First of Three 140A DC-5 1980 PM 0.005 grains/cf

50027 33 4,100 cfm Dust Collector for “Separator Vent” - Second of Three 140Y DC-3 1980 PM 0.005 grains/cf

50028 34 4,100 cfm Dust Collector for “Separator Vent” - Third of Three 140Y DC-4 1980 PM 0.005 grains/cf

50031 39 6,200 cfm Dust Collector for Fresh Alumina & Fluoride Storage Tanks (potline #2) 142M DC-7 1980 PM 0.005 grains/cf

50030 40 1,600 cfm Dust Collector for Fresh Alumina & Fluoride Storage Tanks (potline #1) 141M DC-6 1980 PM 0.005 grains/cf

53002 02 Scrubber and Dust Collector for Alumina Reduction Pots on Potline #1 (161E) - fresh alumina used as scrubbing media 1980 Fluorides PM N/A

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 22 OF 45 (permit revised 1/30/03, see page 2 for details)

Control Device ID Stack ID Control Device Description Installation Date Pollutant(s) Controlled Efficiency Capture (Removal)

53003 03 Scrubber and Dust Collector for Alumina Reduction Pots on Potline #1 (161W) - fresh alumina used as scrubbing media 1980 Fluorides PM N/A

50041 41 2,400 cfm Dust Collector for Potline #1 Enriched Alumina Conveying System “Pneumatic Conveyors” 141R DC-10 1980/1996 PM 0.005 grains/cf

50039 42 8,200 cfm Dust Collector for Potline #1 Enriched Alumina Conveying System “Air Slides and Tanks” 141R DC-8 1980 PM 0.005 grains/cf

50040 43 2,400 cfm Dust Collector for Potline #1 Enriched Alumina Conveying System “Pneumatic Conveyors” 141R DC-9 1980/1996 PM 0.005 grains/cf

53004 04 Scrubber and Dust Collector for Alumina Reduction Pots on Potline #2 (162E) - fresh alumina used as scrubbing media 1980 Fluorides PM N/A

53005 05 Scrubber and Dust Collector for Alumina Reduction Pots on Potline #2 (162W) - fresh alumina used as scrubbing media 1980 Fluorides PM N/A

50044 44 2,400 cfm Dust Collector for Potline #2 Enriched Alumina Conveying System “Pneumatic Conveyors” 142R DC-13 1980/1996 PM 0.005 grains/cf

50042 45 8,200 cfm Dust Collector for Potline #2 Enriched Alumina Conveying System “Air Slides and Tanks” 142R DC-11 1980 PM 0.005 grains/cf

50043 46 2,400 cfm Dust Collector for Potline #2 Enriched Alumina Conveying System “Pneumatic Conveyors” 142R DC-12 1980/1996 PM 0.005 grains/cf

50032 30 135,400 cfm Dust Collector for Bath Crusher and Storage 136 DC-1 1980/1983 PM 0.0035 grains/cf

50052 31 3,031 cfm Dust Collector for Screens and Bath Storage Tanks 136 DC-2 1980 PM 0.005 grains/cf

50033 35 1,600 cfm Dust Collector for Bath Feed Station at Potroom #101 DC-101K 1980/1982 PM 0.005 grains/cf

50034 36 1,600 cfm Dust Collector for Bath Feed Station at Potroom #102 DC-102K 1980/1982 PM 0.005 grains/cf

50035 37 1,600 cfm Dust Collector for Bath Feed Station at Potroom #103 DC-103K 1980/1982 PM 0.005 grains/cf

50036 38 1,600 cfm Dust Collector for Bath Feed Station at Potroom #104 DC-104K 1980/1982 PM 0.005 grains/cf ID 05 - POT REPAIR

50061-50063 21A 75,000 cfm Pot Repair dust collection system 138 DC-2 1997 PM 0.0035 grains/cf ID 06 - CAST HOUSE

50045 47 18,722 cfm Dust Collector for Dross Cooling Operations 302 DC-3 1980 PM 0.005 grains/cf

50046 48 6,000 cfm Cyclone/Dust Collection System for Ball Mill #1 302 DC-1 1980 PM 0.005 grains/cf

50047 49 6,000 cfm Cyclone/Dust Collection System for Ball Mill #2 302 DC-2 1980 PM 0.005 grains/cf

50038 50 30,360 cfm Dust Collector Dross Pad 302 DC-4 1980 PM 0.005 grains/cf

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 23 OF 45 (permit revised 1/30/03, see page 2 for details)



### C. EQUIPMENT DESCRIPTION

A description of the equipment located at this facility is provided in the following tables:

TABLE 5.3 UNIT ID 01 - Green Carbon Plant

Equip ID Equipment Description Installation Date Control Device ID Stack ID

71077 23 tons/hr Pitch Unloading Station (from rail cars) 1979/1995 N/A N/A

83016 490 ton Pitch Storage Tank #1 1979 N/A 80 83017 490 ton Pitch Storage Tank #2 1979 N/A 81 83018 490 ton Pitch Storage Tank #3 1979 N/A 82

73501 1.6 x 10 6 BTU/hr Hot Oil Heater for Pitch Unloading Station and Storage Tanks (burns natural gas and propane) 1979 N/A 84

80201 100 tons/hr Coke Unloading Station (from rail cars) 1979 50058 12

83022 4500 ton Coke Storage Tank #1 1979 50020 11 83022 4500 ton Coke Storage Tank #2 1979 50020 11 83003 250 ton Fluid Coke Storage Tank 1979 50020 11

81401 16 tons/hr Coke Crushing Equipment (various conveyors, mills, feed tanks, are used) 1979 50012 19

81403 10 tons/hr Butt Classifying Equipment (classify spent anode butts by size - various conveyors, mills, feed tanks are used) 1979 50013 15

81402 12 tons/hr Classifier Material Handling Equipment (convey and store materials classified by size - various conveyors, mills, feed tanks, are used) 1979 50014 13

80503 15 tons/hr Storage Reclaim Equipment (convey and store materials classified by size - various

conveyors, mills, feed tanks, are used) 1979 50015 16

80222 30 tons/hr Aggregate Blending Equipment (mix and blend sized material - various conveyors, mills, feed tanks, are used) 1979 50016 18

89004 13 tons/hr Ball Mill Classifying Equipment 1979 50005 14

89005 12 tons/hr Intermediate Classifying Equipment 1979 50006 17

81403 10 tons/hr Secondary Butt Crushing Equipment 1979 50057 10

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 24 OF 45 (permit revised 1/30/03, see page 2 for details)

Equip ID Equipment Description Installation Date Control Device ID Stack ID

83019 200 ton Butts Storage Tank #1 (spent anode butt storage) 1979 50056 09

83055 200 ton Butts Storage Tank #2/ conveyor (spent anode butt storage) 1996 50056 09

89056 3 tons/hr Fines Recovery Equipment 1982 50051 20

73502 5.0 x 10 6 BTU/hr Hot Oil Heater for Anode Forming Process (burns natural gas and propane) 1979 N/A 83

81605 150,000 tons/yr Anode Forming Equipment (combine pitch, coke, and

spent anode butts to produce green anodes) 1979/1996 50054 85



### TABLE 5.4 UNIT ID 02 - Baked Carbon Plant

Equip ID Equipment Description Installation Date Control Device ID Stack ID

53001 North and South Bake Ovens (burn natural gas and propane) - NSPS 1979 53001 01

73050-N & 73051- S North and South Bake Ovens (Ridge Vents: Emissions to Ambient Plant Air) 1979 N/A 01A

80912 &

80913 130,000 tons/yr Anode Block Cleaning and Material Transfer Equipment (clean eyes of baked anode blocks & transfers materials to trucks) 1979 50023 08

83044 150 ton Fresh Alumina Transfer and Storage Equipment (store fresh alumina and transfer to bake oven dry scrubber) 1979 50024 06

83045 50 ton Fluoride Enriched Alumina Transfer and Storage Equipment (store fluoride enriched alumina and transfer to potlines) 1979 50025 07

89054 1,080 cfm Housekeeping Equipment (vacuum and dust collector) 1986 89054 100



### TABLE 5.5 UNIT ID 03 - Anode Rodding

Equip ID Equipment Description Installation Date Control Device ID Stack ID

81801 40 tons/hr Bath Removal Station (remove bath from spent anode butts) 1979/1982 50032 30

81802 110 anodes/hr Butt Blasting Equipment (remove remaining bath from spent anode butts) 1979 50007 24

81002, 81003 110 anodes/hr Butt Stripping, Conveying, and Crushing Equipment

(strip spent anode butts from rods, crush spent anode butts) 1979 50008 22

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 25 OF 45 (permit revised 1/30/03, see page 2 for details)

Equip ID Equipment Description Installation Date Control Device ID Stack ID

81804 110 rods/hr Rod and Stub Blasting Equipment (clean rods and stubs after spent anodes are removed) 1979 50059 23

86022 0.5 tons/hr Truck Loading Station (load butt blast material to trucks) 1979 50064 26

80811 110 anodes/hr Anode Eye Cleaning Equipment (clean anode eyes before rods are attached) 1979 50050 27

73201, 73202, 73203 110 anodes/hr (3) Induction Furnaces (melt iron and additives for anode rodding process) 1979 50010 25

81819 16 bars/hr Cathode Collector Bar Cleaning Equipment (clean cathode collector bars) 1984/1985 50055 101



### TABLE 5.6 UNIT ID 04 - Potlines

Equip ID Equipment Description Installation Date Control Device ID Stack ID

74711 200 tons/hr Alumina/Fluoride Unloading & Storage - Track Hopper (unload from rail cars) 1980 50053 29

80015 200 tons/hr Alumina/Fluoride Unloading & Storage - Screening Tower (convey alumina and fluoride) 1980 50026 28

83026 35,000 tons Alumina/Fluoride Unloading & Storage - Lift Tower

(convey and store alumina and fluoride) 1980 50029 32

83024 200 tons/hr Alumina/Fluoride Unloading & Storage - Separator Vent (convey and store alumina and fluoride) 1980 50027 33

83025 200 tons/hr Alumina/Fluoride Unloading & Storage - Separator Vent (convey and store alumina and fluoride) 1980 50028 34

83030 2,000 ton Potline #2 - Fresh Alumina & Fluoride Storage Tanks 1980 50031 39

83027 2,000 ton Potline #1 - Fresh Alumina & Fluoride Storage Tanks 1980 50030 40

70010 Aluminum Potline #1 - 161E Dry Scrubber (electrolytic reduction of alumina to elemental aluminum) - NSPS 1980 53002 02

70010 Aluminum Potline #1 - 161W Dry Scrubber (electrolytic reduction of alumina to elemental aluminum) - NSPS 1980 53003 03

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 26 OF 45 (permit revised 1/30/03, see page 2 for details)

Equip ID Equipment Description Installation Date Control Device ID Stack ID

84050 15 tons/hr Potline #1 - Enriched Alumina Conveying System “Pneumatic Conveyors” (convey enriched alumina from scrubber to storage tank) 1980 50041 41

83041 2,000 tons Potline #1 - Enriched Alumina Conveying System “Air Slides and Tanks” (store enriched alumina) 1980 50039 42

84040 15 tons/hr Potline #1 - Enriched Alumina Conveying System “Pneumatic Conveyors” (convey enriched alumina from scrubber to storage tank) 1980 50040 43

40101 Potline #1 - #101/#102 East Ridge Vent: Emissions to Ambient Plant Air - NSPS 1980 N/A 02A

40102 Potline #1 - #101/#102 West Ridge Vent: Emissions to Ambient Plant Air - NSPS 1980 N/A 03A

70010 Aluminum Potline #2 - 162E Dry Scrubber (electrolytic reduction of alumina to elemental aluminum) - NSPS 1980 53004 04

70010 Aluminum Potline #2 - 162W Dry Scrubber (electrolytic reduction of alumina to elemental aluminum) - NSPS 1980 53005 05

84060 15 tons/hr Potline #2 - Enriched Alumina Conveying System “Pneumatic Conveyors” (convey enriched alumina from scrubber to storage tank) 1980 50044 44

83051 2,000 tons Potline #2 - Enriched Alumina Conveying System “Air Slides and Tanks” (store enriched alumina) 1980 50042 45

84070 15 tons/hr Potline #2 - Enriched Alumina Conveying System “Pneumatic Conveyors” (convey enriched alumina from scrubber to storage tank) 1980 50043 46

40103 Potline #2 - #103/#104 East Ridge Vent: Emissions to Ambient Plant Air - NSPS 1980 N/A 04A

40104 Potline #2 - #103/#104 West Ridge Vent: Emissions to Ambient Plant Air - NSPS 1980 N/A 05A

81202 40 tons/hr Bath Handling and Crushing System - Bath Crusher and Storage (crush and store bath; clean crucibles) 1980 50032 30

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 27 OF 45 (permit revised 1/30/03, see page 2 for details)

Equip ID Equipment Description Installation Date Control Device ID Stack ID

83031- 83036 40 tons/hr Bath Handling and Crushing System - Screens and Bath

Storage Tanks (classify and store bath) 1980 50052 31

70026 22 tons/hr Bath Handling and Crushing System - Bath Feed Station at Potroom #101 (supply bath for use on potline) 1980/1982 50033 35

70027 22 tons/hr Bath Handling and Crushing System - Bath Feed Station at Potroom #102 (supply bath for use on potline) 1980/1982 50034 36

70028 22 tons/hr Bath Handling and Crushing System - Bath Feed Station at Potroom #103 (supply bath for use on potline) 1980/1982 50035 37

70029 22 tons/hr Bath Handling and Crushing System - Bath Feed Station at Potroom #104 (supply bath for use on potline) 1980/1982 50036 38



### TABLE 5.7 UNIT ID 05 - Pot Repair

Equip ID Equipment Description Installation Date Modification Date Control Device ID Stack ID

40138 General Operations - Pot Digging, Blasting, Loading, and Other Misc. Operations 1980 1997 50061-50063 21A



### TABLE 5.8 UNIT ID 06 - Cast House

Equip ID Equipment Description Installation Date Control Device ID Stack ID

73103 &

71010 65,000 lbs/batch Hot Side - Horizontal Direct Cast (HDC) Furnace 103 and HDC In-Line Metal Treatment Unit (alloy, treat, and cast molten aluminum) - NESHAP 1980/2001 N/A 51-103 & 51-103 MTU

73104 65,000 lbs/batch Hot Side - Horizontal Direct Cast (HDC) Furnace 104 (alloy, treat, and cast molten aluminum) 1980 N/A 51-104

73105 110,000 lbs/batch Hot Side - Vertical Direct Cast (VDC) Furnace 105

(alloy, treat, and cast molten aluminum) 1980/1992 N/A 51-105

73106 &

71001 110,000 lbs/batch Hot Side -Vertical Direct Cast (VDC) Furnace 106 and Pit #1 In-Line Metal Treatment Unit (alloy, treat, and cast molten aluminum) - NESHAP 1980/1991/2001 N/A 51-106 & 51-106 MTU

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 28 OF 45 (permit revised 1/30/03, see page 2 for details)

Equip ID Equipment Description Installation Date Control Device ID Stack ID

73107 &

71002 110,000 lbs/batch Hot Side -Vertical Direct Cast (VDC) Furnace 107 and Pit #2 In-Line Metal Treatment Unit (alloy, treat, and cast molten aluminum) - NESHAP 1980/1988/2001 N/A 51-107 & 51-107 MTU

73109 110,000 lbs/batch Hot Side -Vertical Direct Cast (VDC) Furnace 109

(alloy, treat, and cast molten aluminum) 1980/1989 N/A 51-109

73110 &

71003 110,000 lbs/batch Hot Side -Vertical Direct Cast (VDC) Furnace 110 and Pit #3 In-Line Metal Treatment Unit (alloy, treat, and cast molten aluminum) - NESHAP 1980/1993/2001 N/A 51-110 & 51-110 MTU

73111 110,000 lbs/batch Hot Side -Vertical Direct Cast (VDC) Furnace 111

(alloy, treat, and cast molten aluminum) 1980/1988 N/A 51-111

73112 &

71004 110,000 lbs/batch Hot Side -Vertical Direct Cast (VDC) Furnace 112 and Pit #4 In-Line Metal Treatment Unit (alloy, treat, and cast molten aluminum) - NESHAP - Applicable as of March 24, 2003 1980/1986 N/A 51-112 & 51-112 MTU

71022 4,500 tons/yr Dross Processing/Remelt - Dross Cooling Operations 1980 50045 47

71045 2,200 tons/yr Dross Processing/Remelt - Ball Mill #1 1980 50046 48

71046 2,200 tons/yr Dross Processing/Remelt - Ball Mill #2 1980 50047 49

73021 Dross Processing - Dross Pad (store dross) also truck loading 1980 50038 50

73011 32,500 tons/yr Cold Side (18 x 10 6 BTU/hr) - Homogenizing Furnace #1 (reheat cast aluminum to produce uniform grain structure) 1980 N/A 52-1

73012 32,500 tons/yr Cold Side (18 x 10 6 BTU/hr) - Homogenizing Furnace #2 (reheat cast aluminum to produce uniform grain structure) 1980 N/A 52-2

73115 3.0 x 10 6 BTU/hr Pre Heat Furnace 2000 N/A 122

73023 40,000 tons/yr Cold Side (36 x 10 6 BTU/hr) - Homogenizing Furnace #3

(reheat cast aluminum to produce uniform grain structure) 1990 N/A 52-3



### D. EMISSION LIMITS AND STANDARDS

Table 5.9 contains summaries of emission unit emission limits and standards.

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 29 OF 45 (permit revised 1/30/03, see page 2 for details)



### TABLE 5.9 EMISSION LIMITS AND STANDARDS

Stack ID Equip ID Control ID Pollutant/ Standard Limit Reference Method Regulation State Only Condition Number
ID 01 - GREEN CARBON PLANT

All All All PM 23.85 lbs/hr 5 SC Regulation 61-62.5, Standard 4, Section VIII No 5.E.11

All except 83-85 All except 81605, 73501 &

73502 All except50 054 Opacity 10% 9 SC Regulation 61-62.5, Standard 7 No 5.E.2

85 81605 50054 Opacity 20% 9 SC Regulation 61-62.5, Standard 4, Section IX No 5.E.10

85 81605 50054 PM 0.75 lb/hr 5 SC Regulation 61-62.5, Standard 7 No 5.E.1

85 81605 50054 SO 2 0.46 lb/hr 6 or 6C SC Regulation 61-62.5, Standard 7 No 5.E.1

83 84 73501 73502 none PM 0.6 lbs/ million BTU heat input 5 SC Regulation 61-62.5, Standard 1, Section II No 5.E.3

83 84 73501 73502 none SO 2 3.5 lbs/ million BTU heat input 6 or 6C SC Regulation 61-62.5, Standard 1, Section III No 5.E.3

83 84 73501 73502 none Opacity 20% 9 SC Regulation 61-62.5, Standard 1,

Section I No 5.E.4

09 09 10 11 11 12 13 14 15 16 17 18 19 20 83019 83055 81403 83022 83003 80201 81402 89004 81403 80503 89005 80222 81401 89056 50056 50056 50057 50020 50020 50058 50014 50005 50013 50015 50006 50016 50012 50051 PM 0.005 gr/dscf 5 SC Regulation 61-62.5, Standard 7 No 5.E.1

ID 02 - BAKED CARBON PLANT

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 30 OF 45 (permit revised 1/30/03, see page 2 for details)

Stack ID Equip ID Control ID Pollutant/ Standard Limit Reference Method Regulation State Only Condition Number

All All All PM 29.13 lbs/hr 5 SC Regulation 61-62.5, Standard 4, Section VIII No 5.E.11

100 01A 01A 89054 73050-N 73051-S 89054 N/A N/A Opacity 20% 9 SC Regulation 61-62.5, Standard 4, Section IX No 5.E.10

01 53001 53001 Opacity 20% 9 40 CFR 60 Subpart A and S No 5.E.5, 8

01 53001 53001 POM 0.18 lb/ton green anode 315 or approved alternative 40 CFR 63 Subpart A and LL No 5.E.5, 9

01 53001 53001 PM 10 /PM 4.58/4.91 lbs/hr 5 SC Regulation 61-62.5, Standard 7 No 5.E.1

01 53001 53001 SO 2 67.4 lbs/hr 6 or 6C SC Regulation 61-62.5, Standard 7 No 5.E.1, 3

01 53001 53001 CO 97.7 lb/hr 10 or 10B SC Regulation 61-62.5, Standard 7 No 5.E.1

01 53001 53001 NO X 8.0 lbs/hr 7 or 7E SC Regulation 61-62.5, Standard 7 No 5.E.1

0.04 lbs/ton of Al equivalent SC Regulation 61-62.5, Standard 7 01 53001 53001 Fluorides 0.2 lb/ton of green anode 13A or B, or approved alternative 40CFR63 Subpart A and LL No 5.E.1, 7

06 07 08 08 83044 83045 80912 80913 50024 50025 50023 50023 Opacity 10% 9 SC Regulation 61-62.5, Standard 7 No 5.E.2

06 07 08 08 100 83044 83045 80912 80913 89054 50024 50025 50023 50023 89054 PM 0.005 lbs/dscf 5 SC Regulation 61-62.5, Standard 7 No 5.E.1

ID 03 - ANODE RODDING

All All All PM 47.4 lbs/hr 5 SC Regulation 61-62.5, Standard 4, Section VIII No 5.E.11

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 31 OF 45 (permit revised 1/30/03, see page 2 for details)

Stack ID Equip ID Control ID Pollutant/ Standard Limit Reference Method Regulation State Only Condition Number
22 22 23 24 25 25 25 26 27 81002 81003 81804 81802 73201 73202 73203 86022 80811 50008 50008 50059 50007 50010 50010 50010 50064 50050 Opacity 10% 9 SC Regulation 61-62.5, Standard 7 No 5.E.2

101 81819 50055 Opacity 40% 9 SC Regulation 61-62.5, Standard 4, Section IX No 5.E.10

125 89055 89055 Opacity 20% 9 SC Regulation 61-62.5, Standard 4, Section IX No 5.E.10

22 22 23 24 25 25 25 26 27 101 125 81002 81003 81804 81802 73201 73202 73203 86022 80811 81819 89055 50008 50008 50059 50007 50010 50010 50010 50064 50050 50055 89055 PM 0.005 gr/dscf 5 SC Regulation 61-62.5, Standard 7 No 5.E.1

ID 04 - POTLINES 02/02A 03/03A 04/04A 05/05A Each Potroom Scrubber/baghouse/

roof vent group PM 28.73 lbs/hr 5 SC Regulation 61-62.5, Standard 4, Section VIII No 5.E.11

All except 02/02A 03/03A 04/04A 05/05A Sources other than Scrubber/baghouse /roof vent groups PM 67.03 lbs/hr 5 SC Regulation 61-62.5, Standard 4, Section VIII No 5.E.11

All All All Opacity 10% 9 SC Regulation 61-62.5, Standard 7 No 5.E.2

02/02A 03/03A 04/04A 05/05A Each Potroom Scrubber/baghouse/

roof vent group Opacity 10% 9 40 CFR 60 Subpart A and S No 5.E.8

02A 03A 04A 05A 40101 40102 40103 40104 N/A N/A N/A N/A PM 18.15 lbs/hr each 5 SC Regulation 61-62.5, Standard 7 No 5.E.1

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 32 OF 45 (permit revised 1/30/03, see page 2 for details)

Stack ID Equip ID Control ID Pollutant/ Standard Limit Reference Method Regulation State Only Condition Number
02 03 04 05 70010 70010 70010 70010 53002 53003 53004 53005 PM 1.5 lbs/hr each 5 SC Regulation 61-62.5, Standard 7 No 5.E.1

02 03 04 05 70010 70010 70010 70010 53002 53003 53004 53005 SO 2 212.24 lbs/hr each 6 or 6B SC Regulation 61-62.5, Standard 7 No 5.E.1

02 03 04 05 70010 70010 70010 70010 53002 53003 53004 53005 CO 3178.3 lbs/hr each 10 or 10B SC Regulation 61-62.5, Standard 7 No 5.E.1

02/02A 03/03A 04/04A 05/05A Each Potroom Scrubber/baghouse/

roof vent group Fluorides 1.02 lb/ton of Al produced per 12 month rolling average; and 1.34 lb/ton of Al produced

per month 13A or B or approved alternative SC Regulation 61-62.5, Standard 7 No 5.E.1, 6

28 29 31 31 31 31 31 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 80015 74711 83031 83032 83033 83034 83035 83036 83026 83024 83025 70026 70027 70028 70029 83030 83027 84050 83041 84040 84060 83051 84070 50026 50053 50052 50052 50052 50052 50052 50052 50029 50027 50028 50033 50034 50035 50036 50031 50030 50041 50039 50040 50044 50042 50043 PM 0.005 lb/dscf 5 SC Regulation 61-62.5, Standard 7 No 5.E.1

30 81202 50032 PM 0.0035 lb/dscf 5 SC Regulation 61-62.5, Standard 7 No 5.E.1

ID 05 - POT REPAIR

21A 40138 50061 50062 50063 Opacity 20% 9 SC Regulation 61-62.5, Standard 4, Section IX No 5.E.10

21A 40138 50061 50062 50063 PM 0.0035 gr/dscf 5 SC Regulation 61-62.5, Standard 4 No 5.E.11

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 33 OF 45 (permit revised 1/30/03, see page 2 for details)

Stack ID Equip ID Control ID Pollutant/ Standard Limit Reference Method Regulation State Only Condition Number
ID 06 - CAST HOUSE

All All All PM 41.71 lbs/hr 5 SC Regulation 61-62.5, Standard 4, Section VIII No 5.E.11

All except

122 All except 73115 All Opacity 10% 9 SC Regulation 61-62.5, Standard 7 No 5.E.2

122 73115 N/A Opacity 20% 9 SC Regulation 61-62.5, Standard 4, Section IX No 5.E.10

47 48 49 50 71022 71045 71046 73021 50045 50046 50047 50038 PM 0.005 lb/dscf 5 SC Regulation 61-62.5, Standard 7 No 5.E.1

51-103 MTU 51-106 MTU 51-107 MTU 51-110 MTU 51-112 MTU 71010 71001 71002 71003 71004 N/A PM 0.01 lb/ton of Al feed, when using reactive flux material 5, or approved equivalent 40 CFR 63 Subpart A and RRR No 5.E.13 5.E.14

51-103 MTU 51-106 MTU 51-107 MTU 51-110 MTU 51-112 MTU 71010 71001 71002 71003 71004 N/A HCl 0.04 lb/ton of Al feed, when using reactive flux material 26A 40 CFR 63 Subpart A and RRR No 5.E.12 5.E.14



### N/A = Not Applicable *As Approved by BAQ

The maximum allowable emission limits above are derived from the various Federal and State regulations that govern the operation of this type of source. All applicab le facility wide emission limits and corresponding regulations are listed above . Additional operating requirements which may be more stringent than those above are contained in Part 4.0, Part 6.0, and Part 7.0 of this permit.

E. EMISSION UNIT CONDITIONS

Condition Number Conditions

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 34 OF 45 (permit revised 1/30/03, see page 2 for details)

Condition Number Conditions

This is a major facility for PSD and shall comply with all applicable requirements per SC Regulation 61-62.5, Standard 7, “Prevention of Significant Deterioration (PSD)”.

These sources are subject to all provisions of SC DHEC Regulation 61-62.5, Standard No. 7, "Prevention of Significant Deterioration" for PM, PM 10 , NO X , CO, Fluorides, and Lead. The Best Available Control Technology (BACT) for these pollutants is determined to be as follows:

POLLUTANT/UNIT CONTROL TECHNOLOGY LIMIT

PM/PM10 (Process) Baghouse Controls 0.005 grains/dry standard cubic foot (except 21A and 30) 0.0035 grains/dry standard cubic foot (Sources 21A and 30)
PM/PM10 (Fuel Combustion) Use of Natural Gas (Propane as backup) Use only specified fuel
PM/PM10 (Fugitives) Best Management Prac tices Comply with specified practices NOx (Process) Good Operating Practices Comply with specified practices NOX (Combustion - Holding Furnaces) Good Operating Practices Comply with specified practices NOX (Combustion - ABO, RF, HF) Good Operating Pr actices Comply with specified practices CO (Process) Good Operating Practices Comply with specified practices CO (Combustion) Good Operating Practices Comply with specified practices Fluorides (Bake Oven) Dry Alumina Inj ection 0.04 lb/ton of Al equivalent Fluorides (Process - Uncontrolled) Good Operati ng Practices Comply with specified practices Fluorides (Potline Scrubbers) Dry Alumina Injection - Fluorides (Potline Roof Monito rs) Good Operating Practices - Fluorides (Combined Scrubbers and Roof Monitors) - 1.02 lbs/ton per rolling 12 mo avg and 1.34 lbs/ton single mo avg Lead (Process) Baghouse Controls Co mply with specified practices Lead (Fugitives) Best Management Practi ces Comply with specified practices 

### 1.

As established by PSD limits, combined sulfur dioxide emissions from all Potline Roof Monitors and Potline Scrubbers shall not exceed 848.96 pounds per hour and 3,718.44 tons per year. Combined carbon monoxide emissions from all Potline Scrubbers sha ll not exceed 12,713.2 pounds per hour and 55,684 tons per year. (Source ID04)



### 2. The visible emissions from each source shall not exceed 10% opacity (Method 9) averaged over 4 consecutive readings taken every 15 seconds. Do cumented exceedances of the visible emission limitations may require source testing for Particulate Ma tter emissions at the discretion of the Bureau of Air Quality. (Sources ID01 except stacks 83-85, ID02 stacks 06-08, ID03 except stack 101 and 125, ID04, ID06 except stack 122)



### 3. These fuel combustion sources shall use only natural gas or propane as fuel. The use of any other substances as fuel is prohibited without prior written approval from the Bureau of Air Quality. (Sources ID01, ID02, and ID06)

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 35 OF 45 (permit revised 1/30/03, see page 2 for details)

Condition Number Conditions



### 4. The Hot Oil Heaters shall not discharge into the ambient air smoke which exceeds an opacity of 20%. The twenty (20) percent opacity limit may be exceeded for sootblowing, but may not be exceeded for more than six (6) minutes in a one hour period nor be exceeded for more than a total of twenty-four (24) minutes in a twenty-four (24) hour period. Th e owner/operator shall, to the extent practicable, maintain and operate any source including associated air pollution control equipment in a manner consistent with good air pollution control practices for minimizing emissions. For the opacity standards set forth above to not apply during star tup or shutdown, the owner/operator shall, for a period of at least five (5) years maintain a log of the time, magnitude, duration and any other pertinent information to determine periods of startup and shutdown and make these records available to a Department representative upon request. (Source ID01 stacks 83 and 84)



### 5. The potlines and anode bake ovens are subject to New Source Performance Standards (NSPS) 40 CFR 60 subparts A and S, as applicable. They are also subject to National Emission Standards For Hazardous Air Pollutants For Primary Aluminum Reduction Plants 40 CFR 63 subparts A and LL, as applicable. The requirements for reporting, testi ng, instrumentation, etc., will be completed as described in these subparts.



### 6. ∋ 63.843(a)(1) - Emission limits for existing Potlines. The owner or operator shall not discharge or cause to be discharged into the atmosphere any em issions of total fluorides (TF) in excess of the applicable limits of 0.95 kg/Mg (1.9 lb/ton) of aluminum produced for each CWPB1 potline. However, the following limits established under PSD ar e more restrictive and shall apply. The total fluoride emissions from both pot lines (1 and 2) shall not exceed 1.02 pounds per ton of aluminum produced as determined by a rolling 12-month averag e. No single monthly average shall exceed 1.34 pounds of total fluoride emissions per t on of aluminum produced. (Source ID04)



### 7. ∋ 63.843(c)(1) - Anode bake furnaces. The owner or operator shall not discharge or cause to be discharged into the atmosphere any emissions of tota l fluorides in excess of 0.10 kg/Mg (0.2 lb/ton) of green anode. However, the following limit established under PSD is more restrictive and shall apply. The total fluoride emissions from the Anode Bake Plant shall not exceed 0.04 pounds per ton of aluminum equivalent as determined by a 12-month rolling average. (Source ID02)



### 8. ∋ 60.193(a)(1) and (2) - No owner or operator shall cau se to be discharged into the atmosphere from any potroom group any gases which exhibit 10 percen t opacity or greater, or from any anode bake plant any gases which exhibit 20 percent opacity or greater. (Sources ID02 stack 01 and ID04 stacks 02-05 and 02A-05A)



### 9. ∋ 63.843(c)(2) - The owner or operator shall not discharge or cause to be discharged into the atmosphere any emissions of polycyclic organic ma tter (POM) in excess of 0.09 kg/Mg (0.18 lb/ton) of green anode from an anode bake furnace. (Source ID02)

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 36 OF 45 (permit revised 1/30/03, see page 2 for details)

Condition Number Conditions



### 10. In accordance with SC Regulations 62.5, Standa rd No. 4, Section IX - VISIBLE EMISSIONS (WHERE NOT SPECIFIED ELSEWHERE), where construction or modification began after December 31, 1985, emissions (including fugitive emissi ons) shall not exhibit an opacity greater than 20%. (Sources ID01 stack 85, ID02 stacks 100 and 01A, ID03 stack 125, ID05 stack 21A, ID06 stack 122) [Note Source ID03 stack 101 has an opacity limit of 40%]



### 11. In accordance with South Carolina Regulation 62.5, Standard No. 4 - EMISSIONS FROM PROCESS INDUSTRIES, Section VIII - OTHER MANUFACTURI NG, particulate matter emissions where not specified elsewhere shall be limited to the rate specified by use of the following equations: for process weight rates less than 30 tons per hour (E = 4.10P 0.67 ) and for process weight rates greater than 30 tons per hour ( E = 55.0P 0.11 - 40) where E = the allowable emission rate in pounds per hour and P = process weight rate in tons per hour. As such, the limit for each specified source based on its nominal production rating is as follows: Source Production Rating (tons/hr) PM Emission Limit (lbs/hr) ID01 (green carbon plant) 13.85 23.85 ID02 (baked carbon plant) 18.66 29.13 ID03 (anode rodding) 67.38 47.40 ID04 (each potline/scrubber/baghouse/roof vent set) 18.28 28.73 * ID04 (dust collectors on equipment other than potlines) 425.00 67.03 ID06 (cast house) 36.53 41.71 * For ID04 potlines, the limit of 19.65 lb/hr for each potline scrubber/baghouse and roof vent set established under PSD is more restrictive and shall apply.



### 12. ∋ 63.1505(j)(1) - Emission limits for In-Line Metal Treatment Units using reactive flux material. The owner or operator shall not discharge or cause to be discharged into the atmosphere any emissions of hydrochloric acid (HCl) in excess of the applicable limits of 0.04 lb per ton of feed for each metal treatment unit. The compliance date for the metal treatment unit designated as 51-112MTU is March 24, 2003, unless modified sooner which requires compliance upon completion of the modification.



### 13. ∋ 63.1505(j)(2) - Emission limits for In-Line Metal Treatment Units using reactive flux material. The owner or operator shall not discharge or cause to be discharged into the atmosphere any emissions of particulate matter (PM) in excess of the applicable limits of 0.01 lb per ton of feed for each metal treatment unit. The compliance date for the metal treatment unit designated as 51-112MTU is March 24, 2003, unless modified sooner which requires compliance upon completion of the modification.



### 14. ∋ 63.1505(j)(3) - Emission limits for In-Line Metal Treatment Units using no reactive flux material. The emission limits in paragraphs (j)(1) and (j)(2) do not a pply to an in-line fluxer that uses no reactive flux materials.



### PART 6.0 MONITORING AND REPORTING REQUIREMENTS [SC Regulation 61-62.1, Section II]; [SC Regulation 61-62.70.6(a)(3)(i)(B)]

A. MONITORING AND REPORTING

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 37 OF 45 (permit revised 1/30/03, see page 2 for details)



### Table 6.1 contains summaries of the monitoring and reporting required of this facility.

TABLE 6.1 MONITORING AND REPORTING

Unit ID Pollutant/ Parameter Limit Required Monitoring Monitoring Frequency Reporting Frequency Condition Number ID 02 AND 04 - ANODE BAKE OVENS AND POTLINES (CONTROL DEVICES)
02, 04 Refer to Conditions N/A Record Keeping Refer to Conditions Refer to Conditions 6.B.1-3, 17-21, 28-29

02 POM 0.18 lb/ton green anode Source Test Annual Annual 6.B.4-8, 17-21, 23, 28
02, 04 Total Fluorides Refer to Table 5.9 Source Test Annual Annual 6.B.3, 5-8, 17- 21, 23, 28
02, 04 Alumina Flow and Air Flow N/A Record Keeping Continuous Refer to Conditions 6.B.9, 17-21, 28- 29
02, 04 Visual Inspections Refer to Table 5.9 Record Keeping Daily Refer to Conditions 6.B.10, 17-21, 28-29
02, 04 Refer to Conditions N/A Refer to Conditions Refer to Conditions Refer to Conditions 6.B.11, 17-21, 28-29 01,02,

04 Sulfur Content 0.85% (pitch) 2.22% (coke) Record Keeping Monthly Quarterly 6.B.12

02, 04 Production Rates Refer to Conditions Record Keeping Daily Refer to Conditions 6.B.13, 17-21, 28-29
02, 04 Exceedances Refer to Conditions Refer to Conditions Refer to Conditions Refer to Conditions 6.B.14-21, 28-29

02 System Maintenance Refer to Conditions Refer to Conditions Refer to Conditions Refer to Conditions 6.B.45 ID 04 - POTLINES (ROOF VENTS - 40101, 40102, 40103, 40104)

04 Total Fluorides Refer to Table 5.9 Source Test Bi-Monthly Bi-Monthly 6.B.22-23, 28-29

ID 02 AND 04 - ANODE BAKE OVENS AND POTLINES (TOTAL EMISSIONS)
02, 04 SO 2 Refer to Table 5.9 Record Keeping Refer to Conditions Refer to Conditions 6.B.12, 28-29

ID 01-06 ALL FUEL BURNING SOURCES

01-06 PM, SO 2 , NO X , CO, VOC Refer to Table 5.9 Record Keeping Annual Refer to Conditions 6.B.24, 28-29

ID 01-06 DUST COLLECTORS

01-06 Pressure Drop/ Inspections Refer to Conditions Record Keeping Monthly Refer to Conditions 6.B.25, 28-29

01-06 PM (Representative Dust Collectors) Refer to Condition Source Test Initial One-time 6.B.23

ID 01-02 AND 04 SCRUBBERS
01-02,

04 Air Flow Rate and Media Flow Rate Refer to Conditions Record Keeping Continuous Refer to Conditions 6.B.26, 28-29

ID 01-06 ALL SOURCES

01-06 Visual Inspections Refer to Table 5.9 Record Keeping Daily Refer to Conditions 6.B.27-29 ID 06 IN-LINE METAL TREATMENT UNITS (51- 106 MTU, 51-107 MTU, 51-110 MTU, 51-103 MTU, 51-112 MTU)*

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 38 OF 45 (permit revised 1/30/03, see page 2 for details)

Unit ID Pollutant/ Parameter Limit Required Monitoring Monitoring Frequency Reporting Frequency Condition Number

06 Refer to Conditions N/A Refer to Conditions Refer to Conditions Refer to Conditions 6.B.23, 6.B.30- 44 N/A = Not Applicable *The compliance date for in-line metal treatment unit 51-112 MTU is March 24, 2003

.



### B. MONITORING AND REPORTING CONDITIONS

Condition Number Conditions

1. §63.848(j) - The owner or operator of an existing potlin e or anode bake furnace shall install, operate, and maintain a monitoring device to determine the daily weight of aluminum produced and the weight of green anode material placed in the anode bake furnace. The weight of green anode material may be determined by monitoring the weight of all anodes or by monitoring the number of anodes placed in the furnace and determining an average weight from meas urements of a representative sample of anodes.

2. §63.848(k) - The owner or operator shall submit r ecommended accuracy requirements to the regulatory authority for review and approval. All monitoring de vices required by this section must be certified by the owner or operator to meet the accuracy requirements and must be calibrated in accordance with the manufacturer’s instructions.

3. §60.194(c) and (d)(2) - The owner or operator shall conduct a performance test on the anode bake plant and primary control system once a year during the lif e of the facility, except when malfunctions prevent representative sampling, as provided under

 60.8(c). The owner or operator shall give the Bureau at least 15 days advance notice of each test. The Bureau ma y require additional testing under section 114 of the Clean Air Act.

4. §63.848(c) - POM emissions from anode bake furnaces. Using the procedures in

 63.847 and in the approved test plan, the owner or operator shall monitor POM emissions from each anode bake furnace on an annual basis. The owner or operator shall compute and record the annual average of POM emissions from at least three runs to determine compliance with the applicable emission limits. The owner or operator must include all valid runs in the annual average.

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 39 OF 45 (permit revised 1/30/03, see page 2 for details)

Condition Number Conditions

5. §63.849(a) - The owner or operator shall use the fo llowing reference methods to determine compliance with the applicable emission limits for TF and POM emissions: (1) Method 1 in appendix A of 40 CFR 60 for sample and velocity traverses; (2) Method 2 in appendix A of 40 CFR 60 for velocity and volumetric flow rate; (3) Method 3 in appendix A of 40 CFR 60 for gas analysis; (4) Method 13A or Method 13B in appendix A of 40 CFR 60, or an approved alternative, for the concentration of TF where stack or duct emissions are sampled; (5) Method 13A or Method 13B and Method 14 or Method 14A in appendix A of 40 CFR 60 or an approved alternative method for the concentration of TF where emissions are sampled from roof monitors not employing wet roof scrubbers; (6) Method 315 in appendix A of 40 CFR 63 or an approved alternative method for the concentration of POM where stack or duct emissions are sampled; and (7) Method 315 in appendix A to this part and Method 14 in appendix A to part 60 of this chapter or an approved alternative method for the con centration of POM where emissions are sampled from roof monitors not employing wet roof scrubbers.

6. §63.849(d) - For sampling using Method 14 in appendi x A of 40 CFR 60, the owner or operator shall install one Method 14 manifold per potline in a potroom that is representative of the entire potline, and this manifold shall meet the installation requirements specified in section 2.2.1 of Method 14 in appendix A of 40 CFR 60.

7. §63.849(e) - The owner or operator may use an alte rnative test method for TF or POM emissions providing: (1) The owner or operator has already demonstrated the equivalency of the alternative method for a specific plant and has received previous approval from the Administrator or the applicable regulatory authority for TF or POM measur ements using the alternative method; or (2) The owner or operator demonstrates to the sa tisfaction of the applicable regulatory authority that the results from the alternative method meet the criteria specified in

 63.848(d)(1) and (d)(3) through (d)(6). The results from the alternative method shall be based on simultaneous sampling using the alternative method and the following reference methods: (i) For TF, Methods 13 and 14 or Method 14A in appendix A of 40 CFR 60; or (ii) For POM, Method 315 in appendix A to 40 CFR 63 and Method 14 in appendix A of 40 CFR 60.

8. §63.850(b) - Except as provided in

 63.850(d), the owner or operator shall submit a summary of all subsequent performance tests to the applicable regulatory authority on an annual basis.

9. §63.848(f) - The owner or operator shall install, opera te, calibrate, and maintain a continuous parameter monitoring system for each emission control device. The owner or operator shall submit for approval a description of the parameter(s) to be monitored, the operating limits, and the monitoring frequency to ensure that the control device is being properly opera ted and maintained. An explanation of the criteria used for selection of the parameter(s), the operating limits, and the monitoring frequency, including how these relate to emission control also shall be s ubmitted. The following monitoring devices shall be installed for dry alumina scrubbers; devices for the measurement of alumina flow and air flow.

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 40 OF 45 (permit revised 1/30/03, see page 2 for details)

Condition Number Conditions

10. §63.848(g) - The owner or operator shall visually insp ect the exhaust stack(s) of each control device on a daily basis for evidence of any visible emissions indicating abnormal operations.

11. §63.850(c) - The owner or operator shall develop and implement a written plan as described in §63.6(e)(3) that contains specific procedures to be followed for operating the source and maintaining the source during periods of startup, shutdown, and malfunction and a program of corrective action for malfunctioning process and control systems used to comply with the standard. The plan does not have to be submitted with the permit application or include d in the operating permit. The permitting authority may review the plan upon request. In addition to the information required in §

 63.6(e)(3), the plan shall include: (1) Procedures, including corrective actions, to be followed if a monitoring device measures an operating parameter outside the limit(s) established under §

 63.847(h), if visible emissions from an exhaust stack indicating abnormal operation of a control device are observed by the owner or operator during the daily inspection required in §

 63.848(g), or if a problem is detected during the daily inspection of a wet roof scrubber for potline secondary emission control required in §63.848(f)(5)(ii); and (2) The owner or operator shall also keep records of each event as required by

 63.10(b) and record and report if an action taken during a startup, s hutdown, or malfunction is not consistent with the procedures in the plan as described in §63.6(e)(3)(iv).

12. The sulfur content of the pitch used in forming the anodes shall not exceed 0.85 % by weight based upon a monthly average. The sulfur content of the coke used in forming the anodes shall not exceed 2.22 % by weight based upon a monthly average. Records of the monthly average sulfur contents of pitch and coke shall be maintained on site for a period of at least five (5) years from the date generated and shall be made available to a Department representative upon request. QUARTERLY reports, including all recorded parameters and calculated values, sha ll be submitted to the Manager of the Technical Management Section, Bureau of Air Quality postmar ked no later than 30 calendar days after the end of the reporting period. (Sources ID01, ID02, ID04)

13. §60.194(b) - The owner or operator shall maintain a record of daily production rates of aluminum and anodes, raw material feed rates, and cell or potline voltages.

14. §63.848(h) - If a monitoring device for a primary control device measures an operating parameter outside the limit(s) established pursuant to

 63.847(h) or if visible emissions indicating abnormal operation are observed from the exhaust stack of a control device during a daily inspection, the owner or operator shall initiate the corrective action procedures identified in the startup, shutdown, and malfunction plan within 1 hour. Failure to initiate the corrective action pro cedures within 1 hour or to take the necessary corrective actions to remedy the problem is a violation.

15. §63.848(i) - If the limit for a given operating parameter associated with monitoring a specific control device is exceeded six times in any semiannual reporti ng period, then any subsequent exceedance in that reporting period is a violation. For the purpose of determining the number of exceedances, no more than one exceedance shall be attributed in any given 24-hour period.

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 41 OF 45 (permit revised 1/30/03, see page 2 for details)

Condition Number Conditions

16. §63.850(d) - As required by

 63.10(e)(3), the owner or operator shall submit a report (or a summary report) if measured emissions are in excess of the applicable standard. The report shall contain the information specified in

 63.10(e)(3)(v) and be submitted semia nnually unless quarterly reports are required as a result of excess emissions.

17. §63.850(e) - The owner or operator shall maintain f iles of all information (including all reports and notifications) required by

 63.10(b) and by 40 CFR 63 Subpart LL.

18. §63.850(e)(1) - The owner or operator must retain each record for at least 5 years following the date of each occurrence, measurement, maintenance, corrective action, report, or record. The most recent 2 years of records must be retained at the facility. The re maining 3 years of records may be retained offsite.

19. §63.850(e)(2) - The owner or operator may retain records on microfilm, on a computer, on computer disks, on magnetic tape, or on microfiche.

20. §63.850(e)(3) - The owner or operator may report required information on paper or on a labeled computer disc using commonly available and compatible computer software.

21. §63.850(e)(4) - In addition to the general records required by §63.10(b), the owner or operator shall maintain records of the following information: (1) Daily production rate of aluminum; (2) Daily production rate of green anode material placed in the anode bake furnace; (3) A copy of the startup, shutdown, and malfunction plan; (4) Records of design information for paste production plant capture systems; (5) Records supporting the monitoring of similar potlines demonstrating that the performance of similar potlines is the same as or better than that of potlines sampled by manual methods; (6) Records supporting a request for reduced sampling of potlines; (7) Records supporting the correlation of emissions measured by a continuous emission monitoring system to emissions measured by manual methods and the derivation of the alternative emission limit derived from the measurements; (8) The current implementation plan for emission averaging and any subsequent amendments; (9) Records, such as a checklist or the equivalent , demonstrating that the daily visual inspection of the exhaust stack for each control device has been performed as required in §

 63.848(g), including the results of each inspection; (10) Records documenting the corrective actions taken when the limit(s) for an operating parameter established under §

 63.847(h) were exceeded or when visible emissions indicating abnormal operation were observed from a control device stack during a daily inspection required under §63.848(g), and; (11) Records documenting the portion of TF that is measured as particulate matter and the portion that is measured as gaseous when the particulate and gaseous fractions are quantified separately using an approved test method.

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 42 OF 45 (permit revised 1/30/03, see page 2 for details)

Condition Number Conditions

22. The owner or operator shall conduct a performance test on the roof monitors from the potlines bimonthly during the life of the facility, except when malfunctions prevent representative sampling, as provided under §60.8(c). The owner or operator shall gi ve the Bureau at least 15 days advance notice of each test. The Bureau may require additional testing under section 114 of the Clean Air Act.

23. All source tests shall be conducted while the facili ty is operating under permitted conditions. The source test should be performed at the expected maximu m production rate. A test conducted under any other conditions may result in production limitations. The owne r or operator shall ensure that source tests are conducted in accordance with requirements listed in 40 CFR 60 (Subparts A and S), 40 CFR 63 (Subparts A and LL), 40 CFR 63 (Subparts A and RRR) and SC Regulation 61-62.1, Section IV, Source Tests. This Bureau must be notified at least tw o weeks prior to any source test so that a Bureau representative may be present. Source test methodology must be approved by this Bureau.

As required by Construction Permit 0420-0015-CR, source tests on representative baghouses of controlled sources (four sources consisting of st acks 08, 21A, 29, and 30, or agreed upon substitute stacks) will be required within 60 days after achie ving maximum production but not later than 180 days after initial start-up to determine compliance with PM BACT limits. The Bureau must be notified at least two weeks prior to a source test so that a Bureau representative may be present. Source test methodology must be approved by the Bureau and comply with Section 60.8 of Subpart A “New Source Performance Standards (NSPS)” and SC DHEC Regulation 62.1, Section IV “Source Testing.” This methodology shall include the specific baghouses that must be tested.

24. The amount of natural gas and propane combusted by all sources at the facility will be tracked using natural gas billing records and records of propane de liveries. Fuel use will be summarized annually. These records shall be maintained on site for a period of at least five (5) years from the date generated and shall be made available to Department personnel upon request.

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 43 OF 45 (permit revised 1/30/03, see page 2 for details)

Condition Number Conditions

25. The owner/operator shall install, operate and main tain pressure drop gauge(s) on each module of the baghouse(s). All pressure drop gauges shall be r eadily accessible for verification by operating personnel and Department personnel (i.e. on ground level or easily accessible roof level). Pressure drop readings shall be recorded MONTHLY and shall be made available to Department personnel upon request. The readings shall be maintained in logs, along with a ny corrective action taken when deviations occur. Operational ranges for the monitored parameters shall be established to provide a reasonable assurance of compliance. These operational ranges for the monitored parameters shall be derived from stack test data, vendor certification, operational history, and visual inspections, the combination of which demonstrate the proper operation of the equipment in complian ce. These ranges, with supporting documentation, shall be submitted to the Bureau for approval within 180 days of the issuance of this permit. The operating ranges may be updated using this procedure, following Bureau approval.

Monthly inspections of these sources will be conducted to include the following: 1) Visually check exhaust from the baghouse to determine if bags are leaking. 2) Visually check motor and belts to identify any abnormalities. 3) Visually inspect baghouse (walls, doors, etc.) for holes or leaks. 4) For Pulse Type Dust Collectors: i) Check each pilot valve for proper operation. ii) Check header-pipe for air leaks and pressure setting. iii) Check pulse timer for proper setting. 5) For Shaker Type Dust Collectors: i) Check each shaker for proper operation. ii) Check all shaker belts for wear; check V-blocks. iii) Check damper operation on each compartment. iv) Check R.V.F. for proper operation. v) Check timing mechanism for proper operation. 6) Check hoppers on each compartment in the dust collector to make sure they are empty. 7) Visually inspect all ductwork in the inlet and outlet of the Baghouse.

Anomalous conditions will be noted and corrective ac tion initiated if warranted. Written procedures for personnel to follow when performing the monthly inspections will be maintained on file at the facility.

The owner/operator shall conduct testing of the filter bags used on site in acco rdance with Alcoa’s Filter Bag Quality Assurance Program created on February 4, 1998.

Baghouse monitoring data shall be maintained on site fo r a period of at least five (5) years from the date generated and shall be made available to Depart ment personnel upon request. Any alternative method for monitoring baghouse performance must be approved by the Bureau and shall be incorporated into the permit as set forth in S. C. Regulation 61-62.70.7.

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 44 OF 45 (permit revised 1/30/03, see page 2 for details)

Condition Number Conditions

26. The owner/operator shall install, operate, and maintain equipment to monitor air flow and media feed rate on each scrubber. All gauges shall be readily accessible for verification by operating personnel and Department personnel (i.e., on ground level or easily acce ssible roof level). Each parameter shall be recorded CONTINUOUSLY and shall be made available to Department personnel upon request. The readings will be summarized on forms that shall be maintained in logs, along with any corrective action taken when deviations occur. Operational ranges for the monitored parameters shall be established to provide a reasonable assurance of compliance. Th ese operational ranges for the monitored parameters shall be derived from stack test data, vendor certification, operational history, a nd visual inspections, the combination of which demonstrate the proper operati on of the equipment in compliance. These ranges, with supporting documentation, shall be submitted to the Bureau for approval within 180 days of the issuance of this permit. The permit will be revised with a minor permit modification pursuant to South Carolina Regulation 61-62.70.7(e)(2) to include the re levant media scrubber and air flow rate to the scrubber. The operating ranges may be updated usi ng this procedure, following Bureau approval. Written procedures for monitoring scrubber performance will be maintained on file at the facility.

Scrubber monitoring data shall be maintained on site fo r a period of at least five (5) years from the date generated and shall be made available to Depart ment personnel upon request. Any alternative method for monitoring scrubber performance must be approved by the Bureau and shall be incorporated into the permit as set forth in S. C. Regulation 61-62.70.7.

27. The facility shall conduct daily visual inspections on all sources for monitoring visual emissions during periods of source operation. These visual observati ons shall be made during daylight hours and consist of time of observation and determination of the pr esence and duration of visible emissions. This information shall be maintained in permanent logs, along with any corrective actions taken. Specific procedures to be undertaken by the facility upon th e observance of visible em issions are as follows:

1) Log the time, date, and dust collector sou rce description in the visible emissions log. 2) Record the time the equipment is shutdo wn and the duration of emissions between the time of visible emissions detection and the shutdown of equipment for repair. 3) Make needed repairs and pla ce dust collector back on line. 4) Inspect dust collector exhaust to ensure pr oblem was effectively corrected by determining that the dust collector has no visible emissi ons. Log the time, date, and dust collector source description as repaired in the visible emissions log.

These records shall maintained on site for a period of at least five years from the date of record and made available to Department representatives upon request.

If the daily visual inspection reveals visible emi ssions, Alcoa - Mt. Holly will take all necessary corrective actions to correct the abnormality as expeditiously as possible. All actions taken by Alcoa - Mt. Holly will be recorded. A semi-annual report, pos tmarked no later than 30 days after the end of the reporting period, shall be submitted to the Manager of the Technical Management Section, Bureau of Air Quality which includes any visible emissions and corrective action taken, or if no visible emissions were observed, Alcoa - Mt. Holly will submit a summary of compliance.

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 45 OF 45 (permit revised 1/30/03, see page 2 for details)

Condition Number Conditions

28. This permit contains compliance certification, tes ting, monitoring, reporting, and record keeping requirements sufficient to assure compliance with the terms and conditions of this permit. All submittals required by these conditions shall be sent to the South Carolina Department of Health and Environmental Control - Bureau of Air Quality (SC DHEC - BAQ) at the following address:

SC DHEC - BAQ Technical Management Section 2600 Bull Street Columbia, SC 29201

29. The owner or operator shall maintain all records for a period of at least five (5) years from the date generated and shall make these records available to Department personnel upon request. Unless another reporting period is specified under 40 CFR 60, 40 CF R 63, or PSD all reports shall be submitted SEMIANNUALLY . The reports including all recorded parameters and calculated values shall be submitted to the Manager of the Technical Management Section, Bureau of Air Quality postmarked no later than 30 calendar days after the end of the reporting period.

30. §63.1506(b) - The owner or operator must provide and maintain easily visible labels posted at each inline fluxer that identifies the applicable emission limits and means of compliance, including: (1) The type of affected source or emission unit; (2) The applicable operational standard(s) and c ontrol method(s), including, but not limited to, the type of charge to be used for a furnace, flux materials and additions practices, and the applicable operating parameter ranges and requirements as incorporated in the OM&M plan.

31. §63.1506(d) - The owner or operator of each affected source or emission unit subject to an emission limit in kg/Mg (lb/ton) of feed must: (1) Install and operate a device that measures and r ecords or otherwise determine the weight of feed (or throughput) for each operating cycle or time period used in the performance test; (2) Operate each weight measurement system or other weight determination procedure in accordance with the OM&M plan.

32. §63.1506(d)(3) - The owner or operator may chose to measure and record aluminum production weight from an affected source or emission unit rather than f eed/charge weight to an affected source or emission unit, provided that: (1) The aluminum production weight, rather than feed/charge weight is measured and recorded for emission units within a secondary aluminum processing unit (SAPU); and (2) All calculations to demonstrate compliance with the emission limits for SAPUs are based on aluminum production weight rather than feed/charge weight.

33. §63.1510(b) - The owner or operator must prepare and implement for each new or existing effected source and emission unit, a written operation, maintena nce, and monitoring (OM&M) plan. This plan shall include all the information required by this s ubpart. The OM&M plan shall be submitted to the Manager of the Technical Management Section for review and approval.

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 46 OF 45 (permit revised 1/30/03, see page 2 for details)

Condition Number Conditions

34. §63.1510(c) - The owner or operator must inspect the labels for each in-line fluxer at least once per calendar month to confirm that posted labe ls as required are intact and legible.

35. §63.1510(e) - The owner or operator must install, ca librate, operate, and maintain a device to measure and record the total weight of feed to, or the aluminum production from, the affected source or emission unit over the same operating cycle or time period used in the performance test. Feed or aluminum production within SAPUs must be measured and r ecorded on an emission unit-by-emission unit basis.

36. §63.1510(e)(1) - The accuracy of the weight m easurement device or procedure must be

 1 percent of the weight being measured. The owner or operator may apply to the permitting agency for approval to use a device of alternative accuracy if the required accuracy cannot be achieved as a result of equipment layout or charging practices. A device of alternative accuracy will not be approved unless the owner or operator provides assurance through data and information that the affected source will meet the relevant emission standard.

37. §63.1510(e)(2) - The owner or operator must verify th e calibration of the weight measurement device in accordance with the schedule specified by the manufactur er, or if no calibration schedule is specified, at least once every six months.

38. §63.1510(j)(1) - The owner/operator must install, calibrate, operate, and maintain a device to continuously measure and record the weight of gaseous or liquid reactive flux injected to each affected source or emission unit.

39. §63.1510(j)(1)(I) - The monitoring system must record the weight for each 15 minute block period, during which reactive fluxing occurs, over the same operating cycle or time period used in the performance test.

40. §63.1510(j)(1)(ii) - The accuracy of the weight measurement device must be

 1 percent of the weight of the reactive component of the flux being measured.

41. §63.1510(j)(1)(iii) - The owner/operator must verify th e calibration of the weight measurement device in accordance with the schedule specified by the manufactur er, or if no calibration schedule is specified, at least once every 6 months.

42. §63.1510(j)(2) - The owner/operator must calculate and record the gaseous or liquid reactive flux injection rate (kg/Mg or lb/ton) for each operating cycl e or time period used in the performance test using the procedure in

 63.1512(o).

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 47 OF 45 (permit revised 1/30/03, see page 2 for details)

Condition Number Conditions

43. §63.1511(b) - Following approval of the site-specific te st plan, the owner or operator must demonstrate initial compliance with each applicable emission, equi pment, work practice, or operational standard for each affected source and emission unit, and report the results in the notification of compliance status report described in §

 63.1515(b). The owner or operator must conduct each performance test according to the requirements of the general provisions in subpart A of the part and this subpart.

44. §63.1516(a) - The owner or operator must develop and implement a written plan as described in §63.6(e)(3) that contains specific procedures to be followed for operating and maintaining the source during periods of startup, shutdown, and malfunction, and a program of corrective action for malfunctioning process and air pollution control equipment used to comply with the standard. The owner or operator shall also keep records of each event as required by §63.10(b) and record and report if an action taken during a startup, shutdown, or malfunction is not consistent with the procedures in the plan as described in §63.6(e)(3). In addition to the information required in §

 63.6(e)(3), the plan must include: (1) Procedures to determine and record the cause of the malfunction and the time the malfunction began and ended; and (2) Corrective actions to be taken in the event of a malfunction of a process or control device, including procedures for recording the actions to be taken to correct the malfunction or minimize emissions.

45. In order to prevent excess or uncontrolled emissions from the Bake Oven during planned maintenance activity that requires APC system shutdown, the Bake Oven will first be shutdown. This shutdown plan must be followed for all planned maintenance shutdow ns. A shut-down is defined as the process of intentional shut down of the bake ovens for a period of one hour or longer. The shut-down process includes the stoppage of fuel to the furnace. The shut-down begins when the fuel system is intentionally shut down for a period of one hour or longer. Th e shut-down concludes when all components of the system have been secured in a shutdown mode or a startup is initiated. The APC system shall continue to operate for a period of at least one hour after the fu rnace is in a secure shutdown mode to allow residual fumes to be exhausted in a controlled environment. During periods of downtime, the system shall be monitored to ensure that adequate ventilation is provided so that flammable toxic gases do not accumulate in the furnace, scrubber or associated ducts. The duration of all events must be recorded.

All planned periods of downtime in excess of one hour shall be reported to SC DHEC at least 24 hours in advance to be followed by a written report submitted to the Department within thirty (30) days. The written report shall include as a minimum, the following: (1) The identity of the stack and/or emi ssion point where the maintenance occurred; (2) The magnitude of any excess emissions e xpressed in the units of the applicable emission limitation and the operating data and calculations used in determining the excess emissions; (3) The time and duration of the excess emissions; (4) The identity of the equipment causing the excess emissions; (5) The nature and cause of such excess emissions; (6) The steps taken to limit the excess emissions; (7) Documentation that the air pollution control equipment, process equipment, or processes were at all times maintained and operated, to the maximum extent practicable, in a manner consistent with good practice for minimizing emissions.

Following completion of maintenance performed during furnace down time, the facility’s startup, shutdown and malfunction (SSM) plan for “startup” mu st be followed to prevent excess or uncontrolled emissions for the Bake Oven.

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 48 OF 45 (permit revised 1/30/03, see page 2 for details)



### PART 7.0 ADDITIONAL CONDITIONS

A. SPECIFIC CONDITIONS

Condition Number Conditions

1. These fuel combustion sources shall use only natural gas or propane as fuel. The use of any other substances as fuel is prohibited without prior wr itten approval from the Bureau of Air Quality. (Source ID01, ID02, and ID06)

2. Alcoa - Mount Holly is subject to the Secondary Aluminum Production MACT (40 CFR 63) that was promulgated on March 23, 2000. The facility has three years to comply with the standards outlined in 40 CFR 63, Subparts A and RRR (March 24, 2003). Should systems be modified then compliance shall be demonstrated upon completion of the modification.

3. There are no Title IV sources at this facility.

4. Any changes to these sources, such as an increase in throughput, changes in the processes, modification or removal of equipment, increase in number of hours of operation, etc., which increase emissions regulated by the NAAQS, PSD, NSPS, NESHAPS, or Air Toxics Program will require a review of the present permit. (All Sources)

5. The facility shall maintain all emission control equipm ent in a manner that minimizes emissions and that is consistent with industry practices for good operation and maintenance of the control devices, including periodic maintenance, testing and adjustment of th e control equipment in accordance with established industry experience or the manufacturers’ recommendations. (All Sources)



### B. OPERATIONAL FLEXIBILITY [SC Regulation 61-62.70.7(e)(5)]

No proposed reasonably anticipated operating s cenarios identified in the permittee’s Part 70 Application.

C. COMPLIANCE SCHEDULE [SC Regulation 61-62.70.5(c)(8)]

Not applicable at this time.

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 49 OF 45 (permit revised 1/30/03, see page 2 for details)



### D. PERMIT SHIELD [SC Regulation 61-62.70.6(f)] (Revised 11/13/98)

A copy of the “applicability determination” Alco a - Mt. Holly submitted with its Part 70 permit application is included as Attachment C. Complia nce with the terms and conditions of this permit shall be deemed compliance with a ny applicable requirements as of the date of permit issuance. The permittee shall also be shielded from any non-applicable requirements as agreed upon by the Department as specified in Attachment C.

Nothing in the permit shield or in any Part 70 perm it shall alter or affect the provisions of Section 303 of the Act, Emergency Orders, of the Clean Air Act; the liability of the permittee for any violation of applicable requirements prior to or at the time of permit i ssuance; the applicable requirements of the Acid Rain Program, consistent with Section 408(a) of the Clean Air Act; or the ability of EPA to obtain informati on from a source pursuant to Section 114 of the Clean Air Act. In addition, the permit shield shall not apply to emi ssion units in noncompliance at the time of permit issuance, minor permit modifications (SC Regul ation 61-62.70.7(e)(2)), group processing of minor permit modifications (SC Regulation 61-62.70.7(e)(3)), or operational flexibility (SC Regulation 61- 62.70.7(e)(5)), except as specified in SC Regulation 61-62.70.7(e)(5)(iii).

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 1 OF 9 (permit revised 1/30/03, see page 2 for details)



### ATTACHMENT A

Modeled Emission Rates

AMBIENT AIR QUALITY STANDARDS - STANDARD 2
Modeled Emission Rates (lbs/hr) STACK TSP PM 10 SO 2 NO X CO

01 - Baked Carbon Plant 4.91 4.58 67.412 7.956 97.7
01A - Baked Carbon Plant 0.554 0.517 - - 3.65
02 - Potlines 1.5 0.87 212.24 1.60 3178.3
02A - Potlines 18.15 10.53 - - - 03 - Potlines 1.5 0.87 212.24 1.60 3178.3
03A - Potlines 18.15 10.53 - - - 04 - Potlines 1.5 0.87 212.24 1.60 3178.3
04A - Potlines 18.15 10.53 - - - 05 - Potlines 1.5 0.87 212.24 1.60 3178.3
05A - Potlines 18.15 10.53 - - - 06 - Baked Carbon Plant 0.176 0.176 - - - 07 - Baked Carbon Plant 0.034 0.034 - - - 08 - Baked Carbon Plant 0.223 0.223 - - - 09 - Green Carbon Plant 0.429 0.429 - - - 10 - Green Carbon Plant 0.459 0.459 - - - 11 - Green Carbon Plant 0.154 0.154 - - - 12 - Green Carbon Plant 0.094 0.094 - - - 13 - Green Carbon Plant 0.174 0.174 - - - 14 - Green Carbon Plant 0.137 0.137 - - - 15 - Green Carbon Plant 0.087 0.087 - - - 16 - Green Carbon Plant 0.249 0.249 - - - 17 - Green Carbon Plant 0.043 0.043 - - - 18 - Green Carbon Plant 0.174 0.174 - - - 19 - Green Carbon Plant 0.503 0.503 - - - 20 - Green Carbon Plant 0.026 0.026 - - - 21A - Pot Repair 2.250 2.250 - - - 22 - Anode Rodding 0.942 0.942 - - - 23, 24, 25 - Anode Rodding 0.966 0.966 - - - 25A - Anode Rodding 0.116 0.058 - - - 26 - Anode Rodding 0.026 0.026 - - - 27 - Anode Rodding 0.300 0.300 - - - 28 - Potlines 0.270 0.270 - - - 29 - Potlines 0.669 0.669 - - - 30 - Potlines 4.062 4.062 - - - 31 - Potlines 0.130 0.130 - - -

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 2 OF 9 (permit revised 1/30/03, see page 2 for details)

32 - Potlines 0.268 0.268 - - - 33 - Potlines 0.176 0.176 - - - 34 - Potlines 0.176 0.176 - - - 35 - Potlines 0.069 0.069 - - - 36 - Potlines 0.069 0.069 - - - 37 - Potlines 0.069 0.069 - - - 38 - Potlines 0.069 0.069 - - - 39 - Potlines 0.266 0.266 - - - 40 - Potlines 0.069 0.069 - - - 41 - Potlines 0.103 0.103 - - - 42 - Potlines 0.351 0.351 - - - 43 - Potlines 0.103 0.103 - - - 44 - Potlines 0.103 0.103 - - - 45 - Potlines 0.351 0.351 - - - 46 - Potlines 0.103 0.103 - - - 47 - Cast House 0.802 0.802 - - - 48 - Cast House 0.257 0.257 - - - 49 - Cast House 0.257 0.257 - - - 50 - Cast House 1.301 1.301 0.009 3.359 1.318
51-103 - Cast House 0.77 0.63 0.009 3.359 1.318
51-104 - Cast House 0.62 0.48 0.009 3.359 1.318
51-105 - Cast House 0.62 0.48 0.009 3.359 1.318
51-106 - Cast House 1.12 0.98 0.009 3.359 1.318
51-107 - Cast House 1.12 0.98 0.009 3.359 1.318
51-109 - Cast House 0.62 0.48 0.009 3.359 1.318
51-110 - Cast House 1.12 0.98 0.009 3.359 1.318
51-111 - Cast House 0.62 0.48 0.009 3.359 1.318
51-112 - Cast House 1.12 0.98 0.009 3.359 1.318

52-1 - Cast House 0.134 0.134 0.011 3.779 1.482
52-2 - Cast House 0.134 0.134 0.011 3.779 1.482
52-3 - Cast House 0.268 0.268 0.021 7.558 2.965

64 - Cast House 0.2244 0.2107 0.013 3.403 1.812
66 - Cast House 0.418 0.323 - - - 83 - Green Carbon Plant 0.037 0.037 0.003 0.773 0.412
84 - Green Carbon Plant 0.012 0.012 0.001 0.248 0.132
85 - Green Carbon Plant 0.75 0.75 0.46 - - 86 – Potlines 0.596 0.298 - - - 87 – Potlines 0.50 0.25 - - - 100 - Baked Carbon Plant 0.046 0.046 - - -

101 - Anode Rodding 0.030 0.030 - - - 106 - General Facility 0.56 0.56 0.52 7.91 1.70 107 - General Facility 0.010 0.010 0.0004 0.334 0.045

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 3 OF 9 (permit revised 1/30/03, see page 2 for details)

108 - General Facility 0.010 0.010 0.0004 0.334 0.045

122 - Cast House 0.022 0.022 0.002 0.464 0.247 125 – Anode Rodding 0.046 0.046 - - -



### AMBIENT AIR QUALITY STANDARDS - STANDARD 2

Modeled Emission Rates (lbs/hr) STACK HF Lead
01 - Baked Carbon Plant 0.52 0.0052
01A - Baked Carbon Plant 0.118 3.38E-6
02 - Potlines 0.63 0.011235
02A - Potlines 3.36 0.0662
03 - Potlines 0.63 0.011235
03A - Potlines 3.36 0.0662

04 - Potlines 0.63 0.011235
04A - Potlines 3.36 0.0662
05 - Potlines 0.63 0.011235
05A - Potlines 3.36 0.0662 21A - Pot Repair 0.00004 0.00008 25A - Anode Rodding 0.000100 4.86E-6
47 - Cast House 0.0076 0.00448
48 - Cast House 0.0024 0.00144
49 - Cast House 0.0024 0.00144
50 - Cast House 0.0247 0.00728
51-103 - Cast House 0.073 0.00001
51-104 - Cast House 0.073 0.00001
51-105 - Cast House 0.073 0.00001
51-106 - Cast House 0.073 0.00001
51-107 - Cast House 0.073 0.00001
51-109 - Cast House 0.073 0.00001
51-110 - Cast House 0.073 0.00001
51-111 - Cast House 0.073 0.00001
51-112 - Cast House 0.073 0.00001
86 - Potlines 0.0249 0.000242
87 - Potlines 0.00138 3.19E-5
64 - Cast House 0.01452 0.00001

30 - Potlines 0.0099 - 84 - Green Carbon - 0.000001
52-1 - Cast House - 0.00001
52-2 - Cast House - 0.00001
52-3 - Cast House - 0.00002

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 4 OF 9 (permit revised 1/30/03, see page 2 for details)

83 - Green Carbon - 0.000002
122 – Cast House - 0.000001



### CLASS II PREVENTION OF SIGNIFICANT DETERIORATION - STANDARD 7

Modeled Emission Rates (lbs/hr) STACK PM 10 SO 2 NO X 01 - Baked Carbon Plant 4.58 67.412 7.956
01A - Baked Carbon Plant 0.517 - - 02 - Potlines 0.87 212.24 1.60
02A - Potlines 10.53 - - 03 - Potlines 0.87 212.24 1.60
03A - Potlines 10.53 - - 04 - Potlines 0.87 212.24 1.60
04A - Potlines 10.53 - - 05 - Potlines 0.87 212.24 1.60
05A - Potlines 10.53 - - 06 - Baked Carbon Plant 0.176 - - 07 - Baked Carbon Plant 0.034 - - 08 - Baked Carbon Plant 0.223 - - 09 - Green Carbon Plant 0.429 - - 10 - Green Carbon Plant 0.459 - - 11 - Green Carbon Plant 0.154 - - 12 - Green Carbon Plant 0.094 - - 13 - Green Carbon Plant 0.174 - - 14 - Green Carbon Plant 0.137 - - 15 - Green Carbon Plant 0.087 - - 16 - Green Carbon Plant 0.249 - - 17 - Green Carbon Plant 0.043 - - 18 - Green Carbon Plant 0.174 - - 19 - Green Carbon Plant 0.503 - - 20 - Green Carbon Plant 0.026 - - 21A - Pot Repair 2.250 - - 22 - Anode Rodding 0.942 - - 23, 24, 25 - Anode Rodding 0.966 - - 25A - Anode Rodding 0.058 - - 26 - Anode Rodding 0.026 - - 27 - Anode Rodding 0.300 - - 28 - Potlines 0.270 - - 29 - Potlines 0.669 - - 30 - Potlines 4.062 - - 31 - Potlines 0.130 - - 32 - Potlines 0.268 - -

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 5 OF 9 (permit revised 1/30/03, see page 2 for details)

33 - Potlines 0.176 - - 34 - Potlines 0.176 - - 35 - Potlines 0.069 - - 36 - Potlines 0.069 - - 37 - Potlines 0.069 - - 38 - Potlines 0.069 - - 39 - Potlines 0.266 - - 40 - Potlines 0.069 - - 41 - Potlines 0.103 - - 42 - Potlines 0.351 - - 43 - Potlines 0.103 - - 44 - Potlines 0.103 - - 45 - Potlines 0.351 - - 46 - Potlines 0.103 - - 47 - Cast House 0.802 - - 48 - Cast House 0.257 - - 49 - Cast House 0.257 - - 50 - Cast House 1.301 0.009 3.359
51-103 - Cast House 0.63 0.009 3.359
51-104 - Cast House 0.48 0.009 3.359
51-105 - Cast House 0.48 0.009 3.359
51-106 - Cast House 0.98 0.009 3.359
51-107 - Cast House 0.98 0.009 3.359
51-109 - Cast House 0.48 0.009 3.359
51-110 - Cast House 0.98 0.009 3.359
51-111 - Cast House 0.48 0.009 3.359
51-112 - Cast House 0.98 0.009 3.359

52-1 - Cast House 0.134 0.011 3.779
52-2 - Cast House 0.134 0.011 3.779
52-3 - Cast House 0.268 0.021 7.558

64 - Cast House 0.2107 0.013 3.403
66 - Cast House 0.323 - - 83 - Green Carbon Plant 0.037 0.003 0.773
84 - Green Carbon Plant 0.012 0.001 0.248
85 - Green Carbon Plant 0.75 0.46 - 86 – Potlines 0.298 - - 87 – Potlines 0.25 - - 100 - Baked Carbon Plant 0.046 - -

101 - Anode Rodding 0.030 - - 106 - General Facility 0.56 0.52 7.91 107 - General Facility 0.010 0.0004 0.334 108 - General Facility 0.010 0.0004 0.334

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 6 OF 9 (permit revised 1/30/03, see page 2 for details)

122 - Cast House 0.022 0.002 0.464 125 - Anode Rodding 0.046 - -



### TOXIC AIR POLLUTANTS MODELED - STANDARD 8

Modeled Emission Rates (lbs/hr)

POLLUTANT CAS NUMBER STACK Ammonium Chloride 12125029 Arsenic 7440382 Biphenyl 92524 Carbonyl Sulfide 463581 Cadmium Chromium

01 - Baked Carbon Plant - - 0.055 - - 0.0075
01A - Baked Carbon Plant - - - - 4.47E-6 5.18E-5
02 – Potlines - 0.000236 - 27.93 0.0001123 0.001100
02A - Potlines - 0.0305 - - - 0.0647
03 - Potlines - 0.000236 - 27.93 0.0001123 0.001100
03A - Potlines - 0.0305 - - - 0.0647
04 - Potlines - 0.000236 - 27.93 0.0001123 0.001100
04A - Potlines - 0.0305 - - - 0.0647
05 - Potlines - 0.000236 - 27.93 0.0001123 0.001100
05A - Potlines - 0.0305 - - - 0.0647 21A - Pot Repair - 0.00056 - - - 0.00007 23, 24, 25 - Anode Rodding - - - - - 0.00162

25A - Anode Rodding - 2.32E-5 - - 6.03E-7 - 47 - Cast House 0.03201 - - - 0.000534 0.003522
48 - Cast House 0.01026 - - - 0.000171 0.001129
49 - Cast House 0.01026 - - - 0.000171 0.001129
50 - Cast House 0.05192 - - - 0.000865 0.005711
51-103 - Cast House - 0.000667 - - 0.000125 0.000422
51-104 - Cast House - 0.000667 - - 0.000125 0.000422
51-105 - Cast House - 0.000667 - - 0.000125 0.000422
51-106 - Cast House - 0.000667 - - 0.000125 0.000422
51-107 - Cast House - 0.000667 - - 0.000125 0.000422
51-109 - Cast House - 0.000667 - - 0.000125 0.000422
51-110 - Cast House - 0.000667 - - 0.000125 0.000422
51-111 - Cast House - 0.000667 - - 0.000125 0.000422
51-112 - Cast House - 0.000667 - - 0.000125 0.000422

64 - Cast House - - - - 4.23E-6 - 66 - Cast House - - - - 3.48E-5 -

86 - Potlines - 0.000801 - - 1.18E-4 2.93E-5
87 -Potlines - 0.000292 - - 6.74E-6 -

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 7 OF 9 (permit revised 1/30/03, see page 2 for details)

85 - Green Carbon Plant - - 0.0053 - - -



### TOXIC AIR POLLUTANTS MODELED - STANDARD 8
Modeled Emission Rates (lbs/hr)

POLLUTANT CAS NUMBER 

### STACK Chlorine 7782505 Cyanide 57125 Ethyl Benzene 100414 Formaldehyde 50000 Hydrochloric Acid 7647010 01 - Baked Carbon Plant - - - - - 21A - Pot Repair - 0.00506 - - - 50 - Cast House - - - - - 51-103 - Cast House 0.60 - - - 0.60
51-104 - Cast House - - - - - 51-105 - Cast House - - - - - 51-106 - Cast House 2.00 - - - 2.00
51-107 - Cast House 2.00 - - - 2.00
51-109 - Cast House - - - - - 51-110 - Cast House 2.00 - - - 2.00
51-111 - Cast House - - - - - 51-112 - Cast House 2.00 - - - 2.00

52-1 - Cast House - - - - - 52-2 - Cast House - - - - - 52-3 - Cast House - - - - -

64 - Cast House - - - - - 83 - Green Carbon Plant - - - - - 84 - Green Carbon Plant - - - - -

77 & 78 - Cast House - - - 0.0004 - 80 - Green Carbon Plant - - 0.003 - - 81 - Green Carbon Plant - - 0.003 - - 82 - Green Carbon Plant - - 0.003 - -

106 - General Facility - - - - -



### TOXIC AIR POLLUTANTS MODELED - STANDARD 8

Modeled Emission Rates (lbs/hr)

STACK POLLUTANT CAS NUMBER

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 8 OF 9 (permit revised 1/30/03, see page 2 for details)

Manganese Naphthalene 91203 Nickel 7440020 Phenol 108952 Phosphorus 7723140 01 - Baked Carbon Plant - 1.37 0.0169 0.398 - 01A - Baked Carbon Plant - - 5.97E-5 - - 02 – Potlines 0.000599 - 0.00159 - - 02A – Potlines 0.0216 - 0.0813 - - 03 – Potlines 0.000599 - 0.00159 - - 03A – Potlines 0.0216 - 0.0813 - - 04 – Potlines 0.000599 - 0.00159 - - 04A – Potlines 0.0216 - 0.0813 - - 05 – Potlines 0.000599 - 0.00159 - - 05A – Potlines 0.0216 - 0.0813 - - 08 - Baked Carbon Plant - - 0.00004 - - 09 - Green Carbon Plant - - 0.00009 - - 10 - Green Carbon Plant - - 0.00009 - - 11 - Green Carbon Plant - - 0.00003 - - 12 - Green Carbon Plant - - 0.00002 - - 13 - Green Carbon Plant - - 0.00003 - - 14 - Green Carbon Plant - - 0.00003 - - 15 - Green Carbon Plant - - 0.00002 - - 16 - Green Carbon Plant - - 0.00005 - - 17 - Green Carbon Plant - - 0.00001 - - 18 - Green Carbon Plant - - 0.00003 - - 19 - Green Carbon Plant - - 0.00010 - - 20 - Green Carbon Plant - - 0.00001 - - 21A - Pot Repair - - 0.00012 - - 22 - Anode Rodding - - 0.00019 - - 23, 24, 25 - Anode Rodding 0.00270 - 0.00277 0.00037 25A - Anode Rodding 6.08E-5 - 0.000245 - - 26 - Anode Rodding - - 0.00001 - - 27 - Anode Rodding - - 0.00006 - - 30 – Potlines - - - - 0.00008
31 – Potlines - - - - 3.0E-6
35 – Potlines - - - - 1.0E-6
36 – Potlines - - - - 1.0E-6
37 – Potlines - - - - 1.0E-6
38 – Potlines - - - - 1.0E-6
47 - Cast House 0.003522 - 0.002508 - 0.01398
48 - Cast House 0.001129 - 0.000804 - 0.00448
49 - Cast House 0.001129 - 0.000804 - 0.00448
50 - Cast House 0.005711 - 0.004067 0.02267 - 51-103 - Cast House 0.01019 0.000347 - - - 51-104 - Cast House 0.01019 - 0.000347 - -

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 9 OF 9 (permit revised 1/30/03, see page 2 for details)

51-105 - Cast House 0.01019 - 0.000347 - - 51-106 - Cast House 0.01019 - 0.000347 - - 51-107 - Cast House 0.01019 - 0.000347 - - 51-109 - Cast House 0.01019 - 0.000347 - - 51-110 - Cast House 0.01019 - 0.000347 - - 51-111 - Cast House 0.01019 - 0.000347 - - 51-112 - Cast House 0.01019 - 0.000347 - -

64 - Cast House 7.19E-5 - 8.27E-6 - - 66 - Cast House 0.000675 - 3.71E-5 - - 85 - Green Carbon Plant - 0.0082 0.005 - - 86 – Potlines - - 0.00133 - - 87 – Potlines 3.76E-5 - 0.00470 - - 100 - Baked Carbon Plant - - 0.00001 - -

101 - Anode Rodding 0.00018 - - - - 80 - Green Carbon Plant - 0.008 - 0.003 - 81 - Green Carbon Plant - 0.008 - 0.003 - 82 - Green Carbon Plant - 0.008 - 0.003 -

125 – Anode Rodding - - 0.00001 - -



### TOXIC AIR POLLUTANTS MODELED - STANDARD 8

Modeled Emission Rates (lbs/hr)

POLLUTANT CAS NUMBER STACK POM Sulfuric Acid 7664939 Hydrogen Sulfide Carbon Disulfide Toluene 108883 01 - Baked Carbon Plant 3.00 3.58 - - - 01A - Baked Carbon Plant 0.000335 - - - - 02- Potlines 0.09977 - 2.91 0.51 - 03- Potlines 0.09977 - 2.91 0.51 - 04- Potlines 0.09977 - 2.91 0.51 - 05- Potlines 0.09977 - 2.91 0.51 - 85 - Green Carbon Plant 0.340 - - - - 80 - Green Carbon Plant 0.224 - - - 0.001
81 - Green Carbon Plant 0.224 - - - 0.001
82 - Green Carbon Plant 0.224 - - - 0.001

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 10 OF 9 (permit revised 1/30/03, see page 2 for details)

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 1 OF 2 (permit revised 1/30/03, see page 2 for details)



## ATTACHMENT B

Insignificant Activities

The following table contains a list of activities whic h are considered insignificant pursuant to South Carolina Regulation 61-62.70.5(c). Sources listed below are not exempt from any otherwise applicable state or federal requirements including, but not limited to, opacity standards, ambient air quality standards, and air toxic standards.

ID General Description Basis

A (6) Anode Rodding Roof Vents - ambient air monitoring conducted 5/17-18/93 criteria <5TPY and HAPs <0.5TPY

B Anode Assembly Machine Vent criteria <5TPY and HAPs <0.5TPY

C Spent Anode Cooling Bays Roof Vents (each of the 15 bays has 3 roof vents) - stack test conducted 4/27-28/93 criteria <5TPY and HAPs <0.5TPY

D Bath Handling Area Roof Vents (8 powered exhaust fans) - stack test conducted 5/17-18/93 criteria <5TPY and HAPs <0.5TPY

E (11) Furnace Roof Vents - stack test c onducted 5/14/93 criteria <5TPY and HAPs <0.5TPY

F Hot Side Operations - Ridge Vent - stack test conducted 5/11-14/93 criteria <5TPY and HAPs <0.5TPY

G (5) Portable Crucible heaters (total heat rating is 22 million BTU/hr - 4.4 million each) criteria <5TPY and HAPs <0.5TPY

H Hot Side Operations - VDC and HDC Cooling Towers - two criteria <5TPY and HAPs <0.5TPY

I 1,200 gallon Aboveground Storage Tank for sodium hydroxide criteria <5TPY and HAPs <0.5TPY

J (2) 2,000 gallon Aboveground Storage Tank for water treatment chemicals criteria <5TPY and HAPs <0.5TPY

K Cold Side Ridge Vent criteria <5TPY and HAPs <0.5TPY L Casting Pit and Pigger Exhausts (5) criteria <5TPY and HAPs <0.5TPY M Cooling Tunnels criteria <5TPY and HAPs <0.5TPY

N (5) Filter Preheaters - 0.5 million BTU/hr each burns natural
gas or propane criteria <5TPY and HAPs <0.5TPY

P Gas-Fired Space Heaters criteria <5TPY and HAPs <0.5TPY Q Gas-Fired Steam Cleaners cr iteria <5TPY and HAPs <0.5TPY R Diesel Powered Emergency Fire Pump criteria <5TPY and HAPs <0.5TPY S (2) Propane Vaporizers criteria <5TPY and HAPs <0.5TPY T Propane Flare criteria <5TPY and HAPs <0.5TPY U (4) 1,000 gallon AST criteria <5TPY and HAPs <0.5TPY V 1,000 gallon AST criteria <5TPY and HAPs <0.5TPY W (2) 6,000 gallon AST criteria <5TPY and HAPs <0.5TPY X 2,000 gallon AST - Gasoline criteria <5TPY and HAPs <0.5TPY Y (1) 2,000, (1) 4,000 and (1) 8,000 gallon ASTs - Diesel criteria <5TPY and HAPs <0.5TPY Z (2) 281,400 AST - Fuel Oil (out of service) criteria <5TPY and HAPs <0.5TPY AA Waste Oil Fired Heater (out of se rvice) criteria <5TPY and HAPs <0.5TPY

BB Cooling Tower for contact cooling water from the anode cooling baths criteria <5TPY and HAPs <0.5TPY

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 2 OF 2 (permit revised 1/30/03, see page 2 for details)


### Note the following changes associated with permit modification (1): Source ID O (Brick Crusher) has been removed. Source ID X: the 4,000 gallon tank is replaced by a 2,000 gallon tank. Source ID Y: one 4,000 gallon tank is replaced by a 2,000 gallon tank.

### Alcoa - Mt. Holly (operating as Alumax of South Carolina) TV-0420-0015 PAGE 1 OF 9



## ATTACHMENT C

Applicable and Non-Applicable Federal and State Regulations

The following contains the Federal and South Carolina air pollution regulations which were specified in the Part 70 permit application and de termined as applicable and non-applicable by the Department as of the date of this permit issu ance. This attachment may be revised by the Department in the event of a ch ange in the nature or emission of pollutants at the source or promulgation of new or revised regulations.

### VIA CERTIFIED MAIL

August 20, 2001

Alcoa - Mt. Holly P.O. Box 1000 Goose Creek, SC 29445

ATTENTION: Mr. Randy Pulley

Dear Mr. Pulley:

Enclosed with this letter is your Part 70 Air Quality (Title V Operating) Permit No. TV-0420-0015 that will become eff ective on October 1, 2001. Please note the conditions and limitations imposed. This permit will be valid through September 30, 2004, unless otherwise pr ovided for by SC DHEC Regulation 61- 62.70.7(c)(1)(ii).

Please review this permit carefully. S hould you notice any errors or omissions, notify your permit engineer, Natalie Loqui st, of this office, at (803) 898-3287 within 15 days of receipt of this letter.

Sincerely,

Carl W. Richardson, P.E., Director Engineering Services Division Bureau of Air Quality

CWR:NL:pe

Enclosure

cc: Bruce Hennessee, Trident EQC District Office Scott Miller, EPA Region IV (via e-mail) TV-0420-0015

### January 30, 2003

Alcoa - Mt. Holly P.O. Box 1000 Goose Creek, SC 29445

ATTENTION: Mr. Randy Pulley

Dear Mr. Pulley:

The operation of your facility has been evaluated by our technical staff. Enclosed please find your revised Title V Operating Permit, permit number TV-1140-0005.

Please note any changes in conditions a nd limitations imposed. This revised permit is being issued as an administrative amendment to add construction permit 0420-0015-CR for increased production to the operating permit. Expiration date of the Title V permit re main the same. Attachment C is not being re-issued.

Please examine this new permit carefully for errors or omissions and notify me at (803) 898-3831, promptly if any are discovered.

Sincerely,

Joe Eller Engineering Services Division Bureau of Air Quality

JE:pe

Enclosure

cc: Bruce Hennessee, Trident EQC District Office Scott Miller, EPA Region IV (via e-mail) TV-0420-0015