p.1 

OAR Box 1840 

Prepped by Ollie Stewart 

Document Number: 

25) IV-H-31 

Docket Number: 

A-90-37 

Printed 11/14/2008 1:25:30 PM Sheet 25 of 27 
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Smith.Pam@epamail.epa.gov, 10:23 AM 11/6/2002 -0500, A-90-37 Docket Submittal Page 1 ot 1 

From: Smith.Pam@epamail.epa.gov 

Date: Wed, 06 Nov 2002 10:23:44 -0500 

Subject: A-90-37 Docket Submittal - Another One! 

To: oloughlin.joanne@ecrweb.com 

X-Mailer: Lotus Notes Release 5.0.9a January 7, 2002 

X-MIMETrack: Serialize by Router on EPAHUB12/USEPA/US(Release 5.0.9a IJanuary 

7, 2002) at 11/06/2002 10:23:14 AM 

Thank you, Pam J. Smith 

Regular Mail: 

USEPA/OAQPS/ITPID/IIG (C339-03) 

RTP,NC 27711 

919-541-0641 (Phone) 

919-541-5509 (Fax) 

Fed. Ex. Address: 

US EPA/OAQPS (C339-03) 

4930 Old Page Road 

RTP,NC 27709 

.— Forwarded by Pam Smith/RTP/USEPA/US on 11/06/2002 10:22 AM -— 

Bill Harnett 

To: Amy_L._Farrell@omb.eop.gov 

11/06/2002 10:21 cc: Arthur_G._Fraas@omb.eop.gov, 

Lorraine_D._Hunt@omb.eop.gov, Pam 

AM Smith/RTP/USEPA/US @EPA 

Subject: Revised Language(Document link: Pam 

Smith) 

A-90-3 7 

IV-H-3 1 

Amy, 

Attached are some changes that we have made to the package that need 

review by you. 

Bill 

(See attached file: footnote.wpd)(See attached file: debottle.wpd) 

footnote.wpd 

debottle.wpd 

Prinfp.H for Tnannp. O'T .nntrhlin <rnlnncrh1in inannp.Oer.rwp.h r.nrtr> 11 nnoro 
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allowing them to use projected actual emissions for purposes of 

this determination. Under this approach, in circumstances where 

there is a reasonable possibility that a project that is not part 

of a major modification may result in a significant increase of a 

regulated NSR pollutant, before beginning actual construction, an 

owner or operator who uses this method must make and record a 

projection of future emissions of that pollutant from changed 

units.x 

To make this projection, the owner or operator would use the 

maximum annual rate at which the modified unit or units are 

projected to emit the pollutant in any of the 5 calendar years 

following the time the unit resumes regular operations after, the 

project (or 10 years if the project increases the unit's design 

capacity or potential to emit the regulated NSR pollutant). The 

owner or operator then uses these projections to calculate 

whether the project will result in a significant emissions 

increase. In making this calculation, the owner or operator 

would exclude any emissions that the unit could have accommodated 

before the change and that are unrelated to the project. The 

owner or operator would also exclude emissions resulting from 

increased utilization due to demand growth that 

'Note that we plan, in the near future, to issue a Notice of Proposed Rulemaking that will 

address the issue of "debottlenecking." In today's rulemaking, we do not intend to change 

current requirements related to "debottlenecking." Use of the term "changed unit" should not be 

interpreted as a change to those requirements. 

35 
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(xxxv) Baseline actual emissions means the rate of 

emissions, in tons per year, of a regulated NSR pollutant, as 

determined in accordance with paragraphs (a)(1)(xxxv)(A) through 

(D) of this section. 

(A) For any existing electric utility steam generating 

unit, baseline actual emissions means the average rate, in tons 

per year, at which the unit actually emitted the pollutant during 

any consecutive 24-month period selected by the owner or operator 

within the 5-year period immediately preceding when the owner or 

operator begins actual construction of the project at that 

emissions unit. The reviewing authority shall allow the use of a 

different time period upon a determination that it is more 

representative of normal source operation. 

(_,) The average rate shall include fugitive emissions to 

the extent quantifiable, and emissions associated with startups, 

shutdowns, and malfunctions. 

(2.) The average rate shall be adjusted downward to exclude 

any non-compliant emissions that occurred while the source was 

operating above any emission limitation that was enforceable 

during the consecutive 24-month period. 

(3.) When a project involves physical changes to or changes 

in the method of operation of multiple emissions units, only one 

consecutive 24-month period may be used to determine the baseline 

actual emissions for the emissions units being changed. 

(4.) The average rate shall not be based on any consecutive 
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24-month period for which there is inadequate information for 

determining annual emissions, in tons per year, and for adjusting 

this amount if required by paragraph (a) (1) (xxxv) (A) (2.) of this 

section. 

(B) For an existing emissions unit (other than an electric 

utility steam generating unit), baseline actual emissions means 

the average rate, in tons per year, at which the emissions unit 

actually emitted the pollutant during any consecutive 24-month 

period selected by the owner or operator within the 10-year 

period immediately preceding either the date the owner or 

operator begins actual construction of the project, or the date a 

complete permit application is received by the reviewing 

authority for a permit required either under this section or 

under a plan approved by the Administrator, whichever is earlier, 

except that the 10-year period shall not include any period 

earlier than November 15, 1990. 

(_,) The average rate shall include fugitive emissions to 

the extent quantifiable, and emissions associated with startups, 

shutdowns, and malfunctions.. 

(2.) The average rate shall be adjusted downward to exclude 

any non-compliant emissions that occurred while the source was 

operating above an emission limitation that was enforceable 

during the consecutive 24-month period. 

(3.) The average rate shall be adjusted downward to exclude 

any emissions that, would have exceeded an emission limitation 
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with which the major stationary source must currently comply, had 

such major stationary source been required to comply with such 

limitations during the consecutive 24-month period. However, if 

an emission limitation is part of a maximum achievable control 

technology standard that the Administrator proposed or 

promulgated under part 63 of this chapter, the baseline actual 

emissions need only be adjusted if the State has taken credit for 

such emissions reductions in an attainment demonstration or 

maintenance plan consistent with the requirements of paragraph 

(a)(3)(ii)(G) of this section. 

(4.) When a project involves physical changes—bo or changes 

in the method of operation of multiple emissions units, only one 

consecutive 24-month period may be used to determine the baseline 

actual emissions for all such emissions units. 

(5.) The average rate shall not be based on any consecutive 

24-month period for which there is inadequate information for 

determining annual emissions, in tons per year, and for adjusting 

this amount if required by paragraphs (a) (1) (xxxv) (B) (2.) and (3.) 

of this section. 

(C) For a new emissions unit, the baseline actual emissions 

for purposes of determining the emissions increase that will 

result from the initial construction and operation of such unit 

shall equal zero; and thereafter, for all other purposes, shall 

equal the unit's potential to emit.