Permit ID: 6-4058-00003/00379 Facility DEC ID: 6405800003

Air Pollution Control Permit Conditions Page 1 FINAL Permit Under the Environmental Conservation Law (ECL) ARTICLE 19: AIR POLLUTION CO NTROL - AIR STATE FACILITY PERMIT IDENTIFICATION INFORMATION Permit Issued To:ALCOA INC 201 ISABELLA ST PITTSBURGH, PA 15212-5858
Facility: ALCOA MASSENA OPERATIONS (WEST PLANT) PARK AVE E MASSENA, NY 13662 Authorized Activity By Standard Industrial Classification Code: 3334 - PRIMARY ALUMINUM 3354 - ALUMINUM EXTRUDED PRODUCTS 3355 - ALUMINUM ROLLING & DRAWING NEC Permit Effective Date: 03/20/2012 Permit Expiration Date: No expiration date.Permit ID: 6-4058-00003/00379 Facility DEC ID: 6405800003

Air Pollution Control Permit Conditions Page 2 FINAL PAGE LOCATION OF CONDITIONS

PAGE FEDERALLY ENFORCEABLE CONDITIONS Facility Level 6 1 6 NYCRR 211.1: Air pollution prohibited 6 2 6 NYCRR 249.3 (a): Compliance Demonstration Emission Unit Level EU=B-00001 7 3 6 NYCRR 249.3 (a): Compliance Demonstration 8 4 6 NYCRR 249.3 (a): Compliance Demonstration EU=B-00001,Proc=OIL 8 5 6 NYCRR 249.3 (a): Compliance Demonstration EU=S-00001,Proc=POT 9 6 6 NYCRR 249.3 (a): Compliance Demonstration 10 7 6 NYCRR 249.3 (a): Compliance Demonstration EU=S-00002,Proc=BAK 11 8 6 NYCRR 249.3 (a): Compliance Demonstration 11 9 6 NYCRR 249.3 (a): Compliance Demonstration STATE ONLY ENFORCEABLE CONDITIONS Facility Level 13 10 ECL 19-0301: Contaminant List 14 11 6 NYCRR 201-1.4: Unavoidable noncompliance and violations 15 12 6 NYCRR Subpart 201-5: Emission Unit Definition 16 13 6 NYCRR 211.2: Visible Emissions Limited 16 14 6 NYCRR 249.3 (f): Compliance Demonstration Emission Unit Level 16 15 6 NYCRR Subpart 201-5: Process Definition By Emission Unit EU=B-00001 18 16 6 NYCRR Subpart 201-5: General Provisions EU=S-00001 18 17 6 NYCRR Subpart 201-5: General Provisions EU=S-00002 19 18 6 NYCRR Subpart 201-5: General ProvisionsPermit ID: 6-4058-00003/00379 Facility DEC ID: 6405800003

Air Pollution Control Permit Conditions Page 3 FINAL FEDERALLY ENFORCEABLE CONDITIONS **** Facility Level  

NOTIFICATION OF GENERAL PERMITTEE OBLIGATIONS This section contains t erms and conditions which are fe derally enforceable. Permittees may also have other obligations under regulations of general applicability Item A: Sealing - 6 NYCRR 200.5 The Commissioner may seal an air contamination source to prevent its operation if compliance with 6 NYCRR Chapter III is not met within the time provided by an order of the Commissioner issued in the case of the violation. Sealing means labeling or tagging a source to notify any person that operation of the source is prohibited, and also includes physical means of preventing the operation of an air contamination source without resulting in destruction of any equipment associated with such source, and includes, but is not limited to, bolting, chaining or wiring shut control panels, apertures or conduits associated with such source. No person shall operate any air contamination source sealed by the Commissioner in accordance with this section unless a modification has been made which enables such source to comply with all requirements applicable to such modification. Unless authorized by the Commissioner, no person shall remove or alter any seal affixed to any contamination source in accordance with this section. Item B: Acceptable Ambient Air Quality - 6 NYCRR 200.6 Notwithstanding the provisio ns of 6 NYCRR Ch apter III, Subchapter A, no person shall allow or permit any air contamination source to emit air contaminants in quantities which alone or in combination with emissions from other air contamination sources would contravene any applicable ambient air quality standard and/or cause air pollution. In such cases where contravention occurs or may occur, the Commissioner shall specify the degree and/or method of emission control required. Item C: Maintenance of Equipment - 6 NYCRR 200.7 Any person who owns or operates an air contamination source which is equipped with an emission control device shall operate such device and keep it in a satisfactory state of maintenance and repair in accordance with ordinary and necessary practices, standards and procedures, inclusive of manufacturer 's specifications, required to operate such device effectively. Item D: Unpermitted Emission Sources - 6 NYCRR 201-1.2 If an existing emission source was subject to the permitting requirements of 6 NYCRR Part 201 at the time of construction orPermit ID: 6-4058-00003/00379 Facility DEC ID: 6405800003

Air Pollution Control Permit Conditions Page 4 FINAL modification, and the owner and/or operator failed to apply for a permit for such emission source then the following provisions apply: (a) The owner and/or operator must apply for a permit for such emission source or register the facility in accordance with the provisions of Part 201. (b) The emission source or facility is subject to all regulations that were applicable to it at the time of construction or modification and any subsequent requirements applicable to existing sources or facilities. Item E: Emergency Defense - 6 NYCRR 201-1.5 An emergency constitutes an affirmative defense to an action brought for noncompliance with emissions limitations or permit conditions for all facilities in New York State. (a) The affirmative defense of emergency shall be demonstrated through properly signed, contemporaneous operating logs, or other relevant evidence that: (1) An emergency occurred and that the facility owner and/or operator can identify the cause(s) of the emergency; (2) The equipment at the permitted facility causing the emergency was at the time being properly operated; (3) During the period of the emergency the facility owner and/or operator took all reasonable steps to minimize levels of emissions that exceeded the emission standards, or other requirements in the permit; and (4) The facility owner and/or operator notified the Department within two working days after the event occurred. This notice must contain a description of the emergency, any steps taken to mitigate emissions, and corrective actions taken. (b) In any enforcement proceeding, the facility owner and/or operator seeking to establish the occurrence of an emergency has the burden of proof. (c) This provision is in addition to any emergency or upset provision contained in any applicable requirement. Item F: Recycling and Salvage - 6 NYCRR 201-1.7 Where practical, any person who owns or operates an air contamination source shall recycle or salvage air contaminants collected in an air cleaning device according to the requirements of 6 NYCRR. Item G: Prohibition of Reintroduction of Collected Contaminants to the Air - 6 NYCRR 201-1.8 No person shall unnecessarily remove, handle, or cause to be handled,Permit ID: 6-4058-00003/00379 Facility DEC ID: 6405800003

Air Pollution Control Permit Conditions Page 5 FINAL collected air contaminants from an air cleaning device for recycling, salvage or disposal in a manner that would reintroduce them to the outdoor atmosphere. Item H: Proof of Eligibility for Sources Defined as Exempt Activities - 6 NYCRR 201-3.2 (a) The owner and/or operator of an emission source or unit that is eligible to be exempt, may be required to certify that it operates within the specific criteria described in 6 NYCRR Subpart 201-3. The owner or operator of any such emission source must maintain all required records on-site for a period of five years and make them available to representatives of the Department upon request. Department representatives must be granted access to any facility which contains emission sources or units subject to 6 NYCRR Subpart 201-3, during normal operating hours, for the purpose of determining compliance with this and any other state and federal air pollution control requirements, regulations, or law. Item I: Proof of Eligibility for Sources Defined as Trivial Activities - 6 NYCRR 201-3.3 (a) The owner and/or operator of an emission source or unit that is listed as being trivial in 6 NYCRR Part 201 may be required to certify that it operates within the specific criteria described in 6 NYCRR Subpart 201-3. The owner or operator of any such emission source must maintain all required records on-site for a period of five years and make them available to representatives of the Department upon request. Department representatives must be granted access to any facility which contains emission sources or units subject to 6 NYCRR Subpart 201-3, during normal operating hours, for the purpose of determining compliance with this and any other state and federal air pollution control requirements, regulations, or law. Item J: Required Emission Tests - 6 NYCRR 202-1.1 An acceptable report of measured emissions shall be submitted, as may be required by the Commissioner, to ascertain compliance or noncompliance with any air pollution code, rule, or regulation. Failure to submit a report acceptable to the Commissioner within the time stated shall be sufficient reason for the Commissioner to suspend or deny an operating permit. Notification and acceptable procedures are specified in 6 NYCRR Subpart 202-1. Item K: Open Fires Prohibitions - 6 NYCRR 215.2 Except as allowed by section 215.3 of 6 NYCRR Part 215, no person shall burn, cause, suffer, allowor permit the burning of any materials in an open fire. Item L: Permit Exclusion - ECL 19-0305 The issuance of this permit by the Department and the receipt thereof by the Applicant does not and shall not be construed as barring, diminishing, adjudicating or in any way affecting any legal, administrative or equitable rights or claims, actions, suits, causesPermit ID: 6-4058-00003/00379 Facility DEC ID: 6405800003

Air Pollution Control Permit Conditions Page 6 FINAL of action or demands whatsoever that the Department may have against the Applicant for violations based on facts and circumstances alleged to have occurred or existed prior to the effective date of this permit, including, but not limited to, any enforcement action authorized pursuant to the provisions of applicable federal law, the Environmental Conservation Law of the State of New York (ECL) and Chapter III of the Official Compilation of the Codes, Rules and Regulations of the State of New York (NYCRR). The issuance of this permit also shall not in any way affect pending or future enforcement actions under the Clean Air Act brought by the United States or any person. Item M: Federally Enforceable Requirements - 40 CFR 70.6 (b) All terms and conditions in this permit required by the Act or any applicable requirement, including any provisions designed to limit a facility's potential to emit, are enforceable by the Administrator and citizens under the Act. The Department has, in this permit, specifically designated any terms and conditions that are not required under the Act or under any of its applicable requirements as being enforceable under only state regulations.

FEDERAL APPLICABLE REQUIREMENTS The following conditions are fed erally enforceable.

Condition 1: Air pollution prohibited Effective between the dates of 03/20/2012 and Permit Expiration Date Applicable Federal Requirement:6 NYCRR 211.1 Item 1.1: No person shall cause or allow emissions of air contaminants to the outdoor atmosphere of such quantity, characteristic or duration which are injurious to human, plant or animal life or to property, or which unreasonably interfere with the comfortable enjoyment of life or property. Notwithstanding the existence of specific air quality standards or emission limits, this prohibition applies, but is not limited to, any pa rticulate, fume, gas, mist, odor, smoke, vapor, pollen, toxic or deleterious emission, either alone or in combination with others.

Condition 2: Compliance Demonstration Effective between the dates of 03/20/2012 and Permit Expiration Date Applicable Federal Requirement:6 NYCRR 249.3 (a) Item 2.1: The Compliance Demonstration activity will be performed for the facility: The Compliance Demonstration applies to:
Emission Unit: S-00001Permit ID: 6-4058-00003/00379 Facility DEC ID: 6405800003

Air Pollution Control Permit Conditions Page 7 FINAL Emission Unit: S-00002 Regulated Contaminant(s): CAS No: 007446-09-5 SULFUR DIOXIDE Item 2.2: Compliance Demonstration shall include the following monitoring: Monitoring Type: MONITORING OF PROCESS OR CONTROL DEVICE PARAMETERS AS SURROGATE Monitoring Description: The specification of % sulfur by weight in the coke used at the plant shall be 2.5% on an annual average basis rolled monthly. This 2.5% limit is approved as the BART limit for sulfur emissions for these two emission units. The sulfur content shall be determined from vendor test data for each lot of coke received for processing. The current annual average and any excursions above the limit shall be reported semiannually on a calendar year basis.
Process Material: COKE Parameter Monitored: SULFUR CONTENT Upper Permit Limit: 2.5 percent by weight Monitoring Frequency: MONTHLY Averaging Method: AVERAGING METHOD - SEE MONITORING DESCRIPTION Reporting Requirements: SEMI-ANNUALLY (CALENDAR) Reports due 30 days after the reporting period. The initial report is due 7/30/2012. Subsequent reports are due every 6 calendar month(s).

** ** Emission Unit Level   Condition 3: Compliance Demonstration Effective between the dates of 03/20/2012 and Permit Expiration Date Applicable Federal Requirement:6 NYCRR 249.3 (a) Item 3.1: The Compliance Demonstration activity will be performed for:
Emission Unit: B-00001 Regulated Contaminant(s): CAS No: 0NY210-00-0 OXIDES OF NITROGEN Item 3.2: Compliance Demonstration shall include the following monitoring: Monitoring Type: INTERMITTENT EMISSION TESTING Monitoring Description: The current emission source configuration is considered BART forPermit ID: 6-4058-00003/00379 Facility DEC ID: 6405800003

Air Pollution Control Permit Conditions Page 8 FINAL emissions of Oxides of Nitrogen. The current emission limit of 0.30 lbs NOx/MMBtu is the emission limit. Testing shall be completed under an approved protocol once during the term of the permit. Upper Permit Limit: 0.30 pounds per million Btus Reference Test Method: EPA RM 7E Monitoring Frequency: AS REQUIRED - SEE PERMIT MONITORING DESCRIPTION Averaging Method: AVERAGING METHOD AS PER REFERENCE TEST METHOD INDICATED Reporting Requirements: SEMI-ANNUALLY (CALENDAR) Reports due 30 days after the reporting period. The initial report is due 7/30/2012. Subsequent reports are due every 6 calendar month(s). Condition 4: Compliance Demonstration Effective between the dates of 03/20/2012 and Permit Expiration Date Applicable Federal Requirement:6 NYCRR 249.3 (a) Item 4.1: The Compliance Demonstration activity will be performed for:
Emission Unit: B-00001 Regulated Contaminant(s): CAS No: 0NY075-00-5 PM-10 Item 4.2: Compliance Demonstration shall include the following monitoring: Monitoring Type: INTERMITTENT EMISSION TESTING Monitoring Description: The current emission source configuration is considered BART for emissions of PM-10. The current emissions of 0.10 lbs PM-10/MMBtu is the emission limit. Testing shall be completed once during the term of the permit. Upper Permit Limit: 0.10 pounds per million Btus Reference Test Method: EPA Method 201A Monitoring Frequency: AS REQUIRED - SEE PERMIT MONITORING DESCRIPTION Averaging Method: AVERAGING METHOD AS PER REFERENCE TEST METHOD INDICATED Reporting Requirements: SEMI-ANNUALLY (CALENDAR) Reports due 30 days after the reporting period. The initial report is due 7/30/2012. Subsequent reports are due every 6 calendar month(s). Condition 5: Compliance Demonstration Effective between the dates of 03/20/2012 and Permit Expiration Date Applicable Federal Requirement:6 NYCRR 249.3 (a)Permit ID: 6-4058-00003/00379 Facility DEC ID: 6405800003

Air Pollution Control Permit Conditions Page 9 FINAL Item 5.1: The Compliance Demonstration activity will be performed for:
Emission Unit: B-00001 Process: OIL Regulated Contaminant(s): CAS No: 007446-09-5 SULFUR DIOXIDE Item 5.2: Compliance Demonstration shall include the following monitoring: Monitoring Type: MONITORING OF PROCESS OR CONTROL DEVICE PARAMETERS AS SURROGATE Monitoring Description: The current limit of 1.5% sulfur by weight fuel oil is considered the BART limit. Fuel supplier certifications shall be used to certify the sulfur level for each delivery.
Parameter Monitored: SULFUR CONTENT Upper Permit Limit: 1.5 percent by weight Monitoring Frequency: PER DELIVERY Averaging Method: MAXIMUM - NOT TO BE EXCEEDED AT ANY TIME (INSTANTANEOUS/DISCRETE OR GRAB) Reporting Requirements: SEMI-ANNUALLY (CALENDAR) Reports due 30 days after the reporting period. The initial report is due 7/30/2012. Subsequent reports are due every 6 calendar month(s). Condition 6: Compliance Demonstration Effective between the dates of 03/20/2012 and Permit Expiration Date Applicable Federal Requirement:6 NYCRR 249.3 (a) Item 6.1: The Compliance Demonstration activity will be performed for:
Emission Unit: S-00001 Process: POT Regulated Contaminant(s): CAS No: 0NY075-00-5 PM-10 Item 6.2: Compliance Demonstration shall include the following monitoring: Monitoring Type: INTERMITTENT EMISSION TESTING Monitoring Description: The current emission source configuration is considered BART for emissions of PM-10. The current emissions of 168 tons per year is the emission limit effective January 1, 2014. Testing shall be completed under an approved protocol within 6 months after the emission limitPermit ID: 6-4058-00003/00379 Facility DEC ID: 6405800003

Air Pollution Control Permit Conditions Page 10 FINAL effective date above. Emission factors established during the stack test shall be used to calculate emissions on an annual basis rolled monthly. Monitoring of the control device is accomplished through the monitoring conditions required under the primary aluminum MACT and satisfy CAM requirements. Upper Permit Limit: 168 tons per year Reference Test Method: EPA Method 201A Monitoring Frequency: ONCE DURING THE TERM OF THE PERMIT Averaging Method: ANNUAL MAXIMUM ROLLED MONTHLY Reporting Requirements: SEMI-ANNUALLY (CALENDAR) Reports due 30 days after the reporting period. The initial report is due 7/30/2012. Subsequent reports are due every 6 calendar month(s). Condition 7: Compliance Demonstration Effective between the dates of 03/20/2012 and Permit Expiration Date Applicable Federal Requirement:6 NYCRR 249.3 (a) Item 7.1: The Compliance Demonstration activity will be performed for:
Emission Unit: S-00001 Process: POT Regulated Contaminant(s): CAS No: 0NY210-00-0 OXIDES OF NITROGEN Item 7.2: Compliance Demonstration shall include the following monitoring: Monitoring Type: INTERMITTENT EMISSION TESTING Monitoring Description: The current emission source configuration is considered BART for emissions of Oxides of Nitrogen. The current emissions of 50 tons per year is the emission limit effective January 1, 2014. Testing shall be completed under an approved protocol within 6 months after the emission limit effective date above. Emission factors established during the stack test shall be used to calculate emissions on an annual basis rolled monthly. Upper Permit Limit: 50 tons per year Reference Test Method: EPA RM 7E Monitoring Frequency: ONCE DURING THE TERM OF THE PERMIT Averaging Method: ANNUAL MAXIMUM ROLLED MONTHLY Reporting Requirements: SEMI-ANNUALLY (CALENDAR) Reports due 30 days after the reporting period. The initial report is due 7/30/2012. Subsequent reports are due every 6 calendar month(s). Condition 8: Compliance DemonstrationPermit ID: 6-4058-00003/00379 Facility DEC ID: 6405800003

Air Pollution Control Permit Conditions Page 11 FINAL Effective between the dates of 03/20/2012 and Permit Expiration Date Applicable Federal Requirement:6 NYCRR 249.3 (a) Item 8.1: The Compliance Demonstration activity will be performed for:
Emission Unit: S-00002 Process: BAK Regulated Contaminant(s): CAS No: 0NY075-00-5 PM-10 Item 8.2: Compliance Demonstration shall include the following monitoring: Monitoring Type: INTERMITTENT EMISSION TESTING Monitoring Description: The current emission source configuration is considered BART for emissions of PM-10. The current emissions of 24 tons per year is the emission limit effective January 1, 2014. Testing shall be completed under an approved protocol within 6 months after the emission limit effective date above. Emission factors established during the stack test shall be used to calculate emissions on an annual basis rolled monthly. Monitoring of the control device is accomplished under the requirments of the primary aluminum MACT within Alcoa's Title V permit and also satisfies CAM requirements. Upper Permit Limit: 24 tons per year Reference Test Method: EPA Method 201A Monitoring Frequency: ONCE DURING THE TERM OF THE PERMIT Averaging Method: ANNUAL MAXIMUM ROLLED MONTHLY Reporting Requirements: SEMI-ANNUALLY (CALENDAR) Reports due 30 days after the reporting period. The initial report is due 7/30/2012. Subsequent reports are due every 6 calendar month(s). Condition 9: Compliance Demonstration Effective between the dates of 03/20/2012 and Permit Expiration Date Applicable Federal Requirement:6 NYCRR 249.3 (a) Item 9.1: The Compliance Demonstration activity will be performed for:
Emission Unit: S-00002 Process: BAK Regulated Contaminant(s): CAS No: 0NY210-00-0 OXIDES OF NITROGEN Item 9.2:Permit ID: 6-4058-00003/00379 Facility DEC ID: 6405800003

Air Pollution Control Permit Conditions Page 12 FINAL Compliance Demonstration shall include the following monitoring: Monitoring Type: INTERMITTENT EMISSION TESTING Monitoring Description: The current emission source configuration is considered BART for emissions of Oxides of Nitrogen. The current emissions of 203 tons per year is the emission limit effective January 1, 2014. Testing shall be completed under an approved protocol within 6 months after the emission limit effective date above. Emission factors established during the stack test shall be used to calculate emissions on an annual basis rolled monthly. Upper Permit Limit: 203 tons per year Reference Test Method: EPA RM 7E Monitoring Frequency: ONCE DURING THE TERM OF THE PERMIT Averaging Method: ANNUAL MAXIMUM ROLLED MONTHLY Reporting Requirements: SEMI-ANNUALLY (CALENDAR) Reports due 30 days after the reporting period. The initial report is due 7/30/2012. Subsequent reports are due every 6 calendar month(s).Permit ID: 6-4058-00003/00379 Facility DEC ID: 6405800003

Air Pollution Control Permit Conditions Page 13 FINAL STATE ONLY ENFORCEABLE CONDITIONS ** ** Facility Level  

NOTIFICATION OF GENERAL PERMITTEE OBLIGATIONS This section contains terms a nd conditions which are not federally enforceable. Permittees may also have other obligations under regulations of general applicability Item A: Public Access to Record keeping for Facilities With State Facility Permits - 6 NYCRR 201-1.10 (a) Where emission source owners and/or operators keep records pursuant to compliance with the operational flexibility requirements of 6 NYCRR Subpart 201-5.4(b)(1) , and/or the emission capping requirements of 6 NYCRR Subparts 201-7.2(d), 201-7.3(f), 201-7.3(g), 201-7.3(h)(5), 201-7.3(i) and 201-7.3(j), the Department will make such records available to the public upon request in accordance with 6 NYCRR Part 616 - Public Access to Records. Emission source owners and/or operators must submit the records required to comply with the request within sixty working days of written notification by the Department of receipt of the request.
Item B: General Provisions for State Enfor ceable Permit Terms and Condition - 6 NYCRR Pa rt 201-5 Any person who owns and/or operates stationary sources shall operate and maintain all emission units and any required emission control devices in compliance with all applicable Parts of this Chapter and existing laws, and shall operate the facility in accordance with all criteria, emission limits, terms, conditions, and standards in this permit. Failure of such person to properly operate and maintain the effectiveness of such emission units and emission control devices may be sufficient reason for the Department to revoke or deny a permit. The owner or operator of the permitted facility must maintain all required records on-site for a period of five years and make them available to representatives of the Department upon request. Department representatives must be granted access to any facility regulated by this Subpart, during normal operating hours, for the purpose of determining compliance with this and any other state and federal air pollution control requirements, regulations or law.

STATE ONLY APPLICABLE REQUIREMENTS The following conditions are stat e only enforceable.

Condition 10: Contaminant List Effective between the dates of 03/20/2012 and Permit Expiration Date Applicable State Requirement:ECL 19-0301Permit ID: 6-4058-00003/00379 Facility DEC ID: 6405800003

Air Pollution Control Permit Conditions Page 14 FINAL Item 10.1: Emissions of the following contaminants are subject to contaminant specific requirements in this permit(emission limits, control requirements or compliance monitoring conditions).
CAS No: 007446-09-5 Name: SULFUR DIOXIDE
CAS No: 0NY075-00-5 Name: PM-10
CAS No: 0NY210-00-0 Name: OXIDES OF NITROGEN Condition 11: Unavoidable noncompliance and violations Effective between the dates of 03/20/2012 and Permit Expiration Date Applicable State Requirement:6 NYCRR 201-1.4 Item 11.1: At the discretion of the commissioner a violation of any applicable emission standard for necessary scheduled equipment maintenance, start-up/shutdown conditions and malfunctions or upsets may be excused if such violations are unavoidable. The following actions and recordkeeping and reporting requirements must be adhered to in such circumstances. (a) The facility owner and/or operator shall compile and maintain records of all equipment maintenance or start-up/shutdown activities when they can be expected to result in an exceedance of any applicable emission standard, and shall submit a report of such activities to the commissioner's representative when requested to do so in writing or when so required by a condition of a permit issued for the corresponding air contamination source except where conditions elsewhere in this permit which contain more stringent reporting and notification provisions for an applicable requirement, in which case they supercede those stated here. Such reports shall describe why the violation was unavoidable and shall include the time, frequency and duration of the maintenance and/or start-up/shutdown activities and the identification of air contaminants, and the estimated emission rates. If a facility owner and/or operator is subject to continuous stack monitoring and quarterly reporting requirements, he need not submit reports for equipment maintenance or start-up/shutdown for the facility to the commissioner's representative. (b) In the event that emissions of air contaminants in excess of any emission standard in 6 NYCRR Chapter III Subchapter A occur due to a malfunction, the facility owner and/or operator shall report such malfunction by telephone to the commissioner's representative as soon as possible during normal working hours, but in any event not later than two working days after becoming aware that the malfunction occurred. Within 30 days thereafter, when requested in writing by the commissioner's representative, the facility owner and/or operator shall submit a written report to the commissioner's representative describing the malfunction, the corrective action taken, identification of air contaminants, and an estimate of the emission rates. These reporting requirements are superceded by cond itions elsewhere in this permit which contain reporting and notification provisions for applicable requirements more stringent than those above. (c) The Department may also require the owner and/or operator to include in reports described under (a) and (b) above an estimate of the maximum ground level concentration ofPermit ID: 6-4058-00003/00379 Facility DEC ID: 6405800003

Air Pollution Control Permit Conditions Page 15 FINAL each air contaminant emitted and the effect of such emissions depending on the deviation of the malfunction and the air contaminants emitted. (d) In the event of maintenance, start-up/shutdown or malfunction conditions which result in emissions exceeding any applicable emission standard, the facility owner and/or operator shall take appropriate action to prevent emissions which will result in contravention of any applicable ambient air quality standard. Reasonably available control technology, as determined by the commissioner, shall be applied during any maintenance, start-up/shutdown or malfunction condition subject to this paragraph. (e) In order to have a violation of a federal regulation (such as a new source performance standard or national emissions standard for hazardous air pollutants) excused, the specific federal regulation must provide for an affirmative defense during start-up, shutdowns, malfunctions or upsets. Condition 12: Emission Unit Definition Effective between the dates of 03/20/2012 and Permit Expiration Date Applicable Stat e Requirement:6 NYCRR Subpart 201-5 Item 12.1: The facility is authorized to perform re gulated processes under this permit for: Emission Unit: B-00001 Emission Unit Description: FOUR VIRTUALLY IDENTICAL PACKAGE BOILERS FIRING EITHER NATURAL GAS OR #6 FUEL OIL. Building(s): 216A Item 12.2: The facility is authorized to perform re gulated processes under this permit for: Emission Unit: S-00001 Emission Unit Description: ONE POTLINE OF ELECTROLYTIC CELLS AND ASSOCIATED CONTROL EQUIPMENT. THIS POTLINE IS CATEGORIZED AS A CENTER WORK PREBAKE-1 (CWPB-1) AS DESCRIBED IN THE DEFINITIONS SECTION OF EPA'S PRIMARY ALUMINUM MACT REGULATIONS. THE PERMIT TO CONSTRUCT WAS ISSUED IN NOVEMBER 1973. Building(s): 401 402 Item 12.3: The facility is authorized to perform re gulated processes under this permit for: Emission Unit: S-00002 Emission Unit Description: ANODE BAKING FURNACE CONSISTING OF 2 RING FURNACES AND ASSOCIATED ALUMINA INJECTION DRY SCRUBBER. Building(s): 351Permit ID: 6-4058-00003/00379 Facility DEC ID: 6405800003

Air Pollution Control Permit Conditions Page 16 FINAL Condition 13: Visible Emissions Limited Effective between the dates of 03/20/2012 and Permit Expiration Date Applicable State Requirement:6 NYCRR 211.2 Item 13.1: Except as permitted by a specific part of this Subchapter and for open fires for which a restricted burning permit has been issued, no person shall cause or allow any air contamination source to emit any material having an opacity equal to or greater than 20 percent (six minute average) except for one continuous six-minute period per hour of not more than 57 percent opacity. Condition 14: Compliance Demonstration Effective between the dates of 03/20/2012 and Permit Expiration Date Applicable State Requirement:6 NYCRR 249.3 (f) Item 14.1: The Compliance Demonstration activity will be performed for the Facility. Item 14.2: Compliance Demonstration shall include the following monitoring: Monitoring Type: RECORD KEEPING/MAINTENANCE PROCEDURES Monitoring Description: The conditions in this permit for NOx, SO2, and/or PM10 established under Part 249 are based on New York's Best Available Retrofit Technology (BART) Rule (6 NYCRR Part 249), are effective on the date of this permit's issuance, and are state-enforceable. Federal enforceability of these facility-specific conditions is effective on the date on which these emission limits, as submitted to EPA as a revision to New York State's Implementation Plan for Regional Haze, are published in the Federal Register. Monitoring Frequency: AS REQUIRED - SEE PERMIT MONITORING DESCRIPTION Reporting Requirements: AS REQUIRED - SEE MONITORING DESCRIPTION

** ** Emission Unit Level **** Condition 15: Process Definition By Emission Unit Effective between the dates of 03/20/2012 and Permit Expiration Date Applicable Stat e Requirement:6 NYCRR Subpart 201-5 Item 15.1: This permit authorizes the following regulated processes for the cited Emission Unit:
Emission Unit: B-00001 Process: GAS Source Classification Code: 2-02-002-02 Process Description: FOUR VIRTUALLY IDENTICAL BOILERS CAPABLE OF BURNINGPermit ID: 6-4058-00003/00379 Facility DEC ID: 6405800003

Air Pollution Control Permit Conditions Page 17 FINAL NATURAL GAS. Emission Source/Control: B0001 - Combustion
Emission Source/Control: B0002 - Combustion
Emission Source/Control: B0003 - Combustion
Emission Source/Control: B0004 - Combustion Item 15.2: This permit authorizes the following regulated processes for the cited Emission Unit:
Emission Unit: B-00001 Process: OIL Source Classification Code: 1-02-004-01 Process Description: FOUR VIRTUALLY IDENTICAL BOILERS CAPABLE OF BURNING NO. 6 FUEL OIL. Emission Source/Control: B0001 - Combustion
Emission Source/Control: B0002 - Combustion
Emission Source/Control: B0003 - Combustion
Emission Source/Control: B0004 - Combustion Item 15.3: This permit authorizes the following regulated processes for the cited Emission Unit:
Emission Unit: S-00001 Process: POT Source Classification Code: 3-03-001-01 Process Description: ELECTROLYTIC REDUCTION OF ALUMINA INTO ALUMINUM. THIS POTLINE IS CATEGORIZED AS A CENTER WORK PREBAKE-1 (CWPB-1) AS DESCRIBED IN THE DEFINITIONS SECTION OF EPA'S PRIMARY ALUMINUM MACT REGULATIONS. Emission Source/Control: SA398 - Control Control Type: SCRUBBER - DRY ALUMINA INJECTION Emission Source/Control: SS198 - Process Item 15.4: This permit authorizes the following regulated processes for the cited Emission Unit:
Emission Unit: S-00002 Process: BAK Source Classification Code: 3-03-001-05 Process Description: ANODE BAKING FURNACE CONSISTING OF 2 RING FURNACES AND ASSOCIATED ALUMINA INJECTION DRY SCRUBBER.Permit ID: 6-4058-00003/00379 Facility DEC ID: 6405800003

Air Pollution Control Permit Conditions Page 18 FINAL Emission Source/Control: SS78S - Control Control Type: SCRUBBER - DRY ALUMINA INJECTION
Emission Source/Control: SS078 - Process Condition 16: General Provisions Effective between the dates of 03/20/2012 and Permit Expiration Date Applicable Stat e Requirement:6 NYCRR Subpart 201-5 Item 16.1: This Condition applies to Emission Unit: B-00001
Item 16.2: This section of the permit contains terms and conditions that are not federally enforceable and are not required under the Act or under any of its applicable requirements. Terms and conditions so designated are not subject to the requirements of Section 201-6.4 of Part 201.
Item 16.3: Any person who owns and/or operates emission sources subject to this permit shall operate and maintain all emission sources and required emission control devices in compliance with all applicable Parts of this Chapter a nd existing laws, and shall operate in accordance with all criteria, emission limits, terms, condit ions, and standards in this permit. Failure of such person to properly operate and maintain the effectiveness of such control devices may be sufficient reason for the Department to revoke or deny a permit.
Item 16.4: The owner or operator of the emission sources subject to this permit must maintain all required records on-site for a period of five years and make them available to representatives of the Department upon request. Department representatives must be granted access during normal operating hours, for the purpose of determining compliance with this and any other state or federal air pollution control requirements, regulations or law.
Condition 17: General Provisions Effective between the dates of 03/20/2012 and Permit Expiration Date Applicable Stat e Requirement:6 NYCRR Subpart 201-5 Item 17.1: This Condition applies to Emission Unit: S-00001
Item 17.2: This section of the permit contains terms and conditions that are not federally enforceable and are not required under the Act or under any of its applicable requirements. Terms and conditions so designated are not subject to the requirements of Section 201-6.4 of Part 201.
Item 17.3: Any person who owns and/or operates emission sources subject to this permit shall operatePermit ID: 6-4058-00003/00379 Facility DEC ID: 6405800003

Air Pollution Control Permit Conditions Page 19 FINAL and maintain all emission sources and required emission control devices in compliance with all applicable Parts of this Chapter a nd existing laws, and shall operate in accordance with all criteria, emission limits, terms, condit ions, and standards in this permit. Failure of such person to properly operate and maintain the effectiveness of such control devices may be sufficient reason for the Department to revoke or deny a permit.
Item 17.4: The owner or operator of the emission sources subject to this permit must maintain all required records on-site for a period of five years and make them available to representatives of the Department upon request. Department representatives must be granted access during normal operating hours, for the purpose of determining compliance with this and any other state or federal air pollution control requirements, regulations or law.
Condition 18: General Provisions Effective between the dates of 03/20/2012 and Permit Expiration Date Applicable Stat e Requirement:6 NYCRR Subpart 201-5 Item 18.1: This Condition applies to Emission Unit: S-00002
Item 18.2: This section of the permit contains terms and conditions that are not federally enforceable and are not required under the Act or under any of its applicable requirements. Terms and conditions so designated are not subject to the requirements of Section 201-6.4 of Part 201.
Item 18.3: Any person who owns and/or operates emission sources subject to this permit shall operate and maintain all emission sources and required emission control devices in compliance with all applicable Parts of this Chapter a nd existing laws, and shall operate in accordance with all criteria, emission limits, terms, condit ions, and standards in this permit. Failure of such person to properly operate and maintain the effectiveness of such control devices may be sufficient reason for the Department to revoke or deny a permit.
Item 18.4: The owner or operator of the emission sources subject to this permit must maintain all required records on-site for a period of five years and make them available to representatives of the Department upon request. Department representatives must be granted access during normal operating hours, for the purpose of determining compliance with this and any other state or federal air pollution control requirements, regulations or law.Permit ID: 6-4058-00003/00379 Facility DEC ID: 6405800003

Air Pollution Control Permit Conditions Page 20 FINAL