EPA Form 7620-23 

### STEP 1 Enter the compliance year and Plant information. STEP 2 For each unit in a common stack or pipe group indicate the fraction of allowances to be deducted. Unless otherwise indicated, an equal percentage of allowances will be deducted from each unit’s account.

STEP 3 Read the certification statement, and sign and date. United States OMB No. 2060-0445 Environmental Protection Agency 

# NOx Budget Trading Program Common Stack Allowance Deduction (Optional) For more information, see instructions and refer to the applicable state regulation [see also 40 CFR 96.30]

Compliance Year Plant Name State ORIS Code NATS Account Number Fraction of Total Allowances to be Deducted Common Stack or Pipe Number

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. Certification I am authorized to make this submission on behal f of the owners and operat ors of the NOx Budget sources or NOx Budget units for which the submissi on is made. I certify under penalty of law that I have personally examined, and am familiar with, the statements and informa tion submitted in this document and all its attachments. Based on my inquiry of those individuals with primary responsibility for obtaining the information, I certif y that the statements and information are to the best of my knowledge and belief true, accurate, and complete. I am aware that there are significant penalties for submitting false st atements and information or omitting required statements and information, including the possibility of fine or imprisonment. Name AAR ID Signature Date Page 

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### 1 EPA Form 7620-23 

# NOx Budget Trading Program Instructions for Common Stack Allowance Deduction Form (OPTIONAL) The Common Stack Allowance Deduction Form may be us ed to indicate the number of allowances to be deducted for compliance from each unit that shares a common stack or pipe. If you choose to use this form, it must be submitted with the Compliance Certification Report by Novermber 30 of the calendar year that includes the control period. Step 1 Enter the calendar year that includes the control period for which you are certifying compliance, Plant Name, State, and ORIS Code. Step 2 When two or more NOx Budget units share a common emission stack and have emissions that are not individually monitored, you have the option of identifying the fraction of total allowances to be deducted from each unit's NOx Allowance Tracking System (NATS) Account, unless the units are using an approved apportionment method under 40 CFR Part 75. (Where an approved special apportionment me thod is used, the deduction from each unit is already established.) When using this opti on, enter the NATS Account Number, Fraction of Total Allowances to be Deducted, and the Common Stack Identification Number for each unit sharing a common stack. If you do not indicate otherwise, an equal percentage of allowances will be deducted from each unit's account. EXAMPLE 1: Four units emit through a common stack (ID No. CS10). The total annual emissions from stack CS10 = 10,000 tons. Leaving Step 2 blank results in the deduction of 2500 allowances from each of the four units. EXAMPLE 2: The same four units emit the same annual emissions as in Example 1. The designated representative wants 60% of the allo wances deducted from unit 1, 40% from unit 4, and 0 from units 2 and 3. The step is completed as illustrated: Fraction of Total NATS Account Number Allowances to be Deducted Common Stack Number

00 0 0 0 1 0 0 0 0 0 1 0 . 6 0 0 0 0 0 0 CS1 0 00 0 0 0 1 0 0 0 0 0 4 0 . 4 0 0 0 0 0 0 CS1 0

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. Step 3 Read the Certifications, type your AAR ID number, sign, and date. Mailing Instructions Mail this form to EPA at one of the following addresses: for regular or certified mail: for overnight mail: U.S. EPA U.S. EPA NOx Budget Trading Program (6204J) NOx Budget Trading Program (6204J) Attention: Annual Reconciliation Attention: Annual Reconciliation 1200 Pennsylvania Avenue, NW 1310 L Street, NW Washington, DC 20460 Washington, DC 20005 Phone: 202-343-9170

### 2 EPA Form 7620-23 Paperwork Burden Estimate The public reporting and recordkeeping burden for this collection of information is estimated to average 1 hour per response annually. Burden means the total time, effort, or financial resources expended by persons to generate, maintain, retain, or disclose or provide informa tion to or for a Federal agency. This includes the time needed to review instructions; develop, acquire, inst all, and utilize technology and systems for the purposes of collecting, validating, and verifying information, processing and maintaining information, and disclosing and providing information; adjust the existing ways to co mply with any previously applicable instructions and requirements; train personnel to be able to respond to a collection of information; search data sources; complete and review the collection of information; and transmit or otherwise disclose the information. An agency may not conduct or sponsor, and a person is not required to respond to, a collection of information unless it displays a currently valid OMB control number. Send comments on the Agency's need for this information, the accuracy of the provided burden estimates, and any suggested methods for minimizing respondent burden, including through the use of automated collection techniques to the Director, Collection Strat egies Division, U.S. Environmental Protection Agency (2822), 1200 Pennsylvania Ave., NW., Washington, D.C. 20460. Include the OMB control number in any correspondence. Do not send the completed form to this address.