"Freeman, Lauren" <lfreeman@hunton.com> 08/15/2007 06:51 PM To Christian Fellner/RTP/USEPA/US@EPA, Peter Westlin/RTP/USEPA/US@EPA cc bcc Subject Section 60.13(d) and Part 75 calibrations History: This message has been forwarded.



### I wanted to follow-up on something we discussed a few weeks ago related to harmonization of Part 75 and Part 60 monitoring requirements under Subpart KKKK. We talked briefing about the applicability (or nonapplicability) of Part 60, Appendix F QA/QC to CEMS under Subpart KKKK based on the language in 60.13(a). There is another QA requirement in 60.13(d)(1), however. That provision makes CEMS "installed in accordance with the provisions of this part" subject to daily calibrations under Part 60, Appendix B. Read very broadly, that provision could subject all CEMS used under Part 60 to the Part 60 calibrations, even if the individual Subpart allowed them to use Part 75 QA in lieu of Appendix F. If that were the case, some additional language would be required in Subpart KKKK (and in the other Subparts like Subpart Da that allow use of Part 75 monitors) in order to allow use of Part 75 calibrations instead. It also is possible to read the rule less broadly so that the Part 60 calibrations would only apply if you were choosing the Part 60 CEMS option under a particular subpart, and would not apply if you were choosing a Part 75 option. I am interested in whether you have thought about how that rule fits into the Part 60/Part 75 harmonization effort, and whether some additional clarification is warranted.

Lauren Freeman Partner lfreeman@hunton.com Hunton & Williams LLP 1900K Street, N.W. Washington, DC 20006 Phone: (202) 778-2248 Fax: (202) 828-3762 www.hunton.com
This communication is confidential and is intended to be privileged pursuant to applicable law . If the reader of this message i s not the intended recipient, or the employee or agent responsible to deliver it to the intended recipient, you are hereby notified that any dissemination, distribu tion or copying of this communication is strictly prohibited. If you have received this message in error, please notify Hunton & Williams LLP immediately by telephone ( 877-374-4937) and by electronic mail to: help

_ desk@hunton.com and then delete this message and all copies and backups thereof."Freeman, Lauren" <lfreeman@hunton.com> 07/23/2007 10:38 AM To Christian Fellner/RTP/USEPA/US@EPA

cc "McRanie, Richard" <mcranie@rmb-consulting.com> bcc Subject KKKK Common Steam Turbine Language History: This message has been forwarded.



### Here is some possible language (both in redlined and unredlined format) to implement the Subpart KKKK common steam turbine monitoring option. Please let me or Richard McRanie (919-510-0483) know if you have any questions. We concluded that it was not necessary to have language regarding common heat recovery steam generators. § 60.4333 What are my general requirements for complying with this subpart?

. . . (b) When an affected unit with heat recovery utilizes a common steam header or steam turbine with one or more combustion turbines, the owner or operator shall determine compliance with the applicable NOx emission limit as follows: (1) For an input based standard (ppm or lb/mmBtu), by measuring the emissions at the exhaust of each heat recovery steam generator; (2) For an output-based standard (lb/Mwhr), if the owner or operator chooses to determine compliance on a combined basis, by measuring and combining the emissions and Mw output from all the unit(s) using the common steam generator, including the output of the steam turbine utilizing the common steam header, or (3) For an output-based standard (lb/Mwhr), if the owner or operator chooses to determine compliance on a unit basis, by measuring emissions and Mw output from each combustion turbine separately and developing, demonstrating, and providing information satisfactory to the Administrator on a method for apportioning the combined gross energy output from the steam generator to each of the affected combustion turbines with heat recovery.

§ 60.4333 What are my general requirements for complying with this subpart?

. . . (b) When an affected unit with heat recovery utilizes a common steam header or steam turbine with one or more combustion turbines, the owner or operator shall either : ( 1 ) Determine determine compliance with the applicable NOX emissions limits NOx emission limit as follows : ( 1 ) For an input based standard ( ppm or lb / mmBtu ) , by measuring the emissions combined with the emissions from the other unit ( s ) utilizing the common at the exhaust of each heat recovery unit ; or steam generator ; (2) Develop , demonstrate , For an output

- based standard ( lb / Mwhr ) , if the owner or operator chooses to determine compliance on a combined basis , by measuring and provide combining the emissions and Mw output from all the unit ( s ) using the common steam generator , including the output of the steam turbine utilizing the common steam header , or ( 3 ) For an output

- based standard ( lb / Mwhr ) , if the owner or operator chooses to determine compliance on a unit basis , by measuring emissions and Mw output from each combustion turbine separately and developing , demonstrating , and providing information satisfactory to the Administrator on methods a method for apportioning the combined gross energy output from the heat recovery unit for steam generator to each of the affected combustion turbines

. The Administrator may approve such demonstrated

### substitute methods for apportioning the combined gross energy output measured at the steam turbine whenever the demonstration ensures accurate estimation of emissions related under this part

. with heat recovery

.

Lauren Freeman Partner lfreeman@hunton.com Hunton & Williams LLP 1900K Street, N.W. Washington, DC 20006 Phone: (202) 778-2248 Fax: (202) 828-3762 www.hunton.com
This communication is confidential and is intended to be privileged pursuant to applicable law . If the reader of this message i s not the intended recipient, or the employee or agent responsible to deliver it to the intended recipient, you are hereby notified that any dissemination, distribu tion or copying of this communication is strictly prohibited. If you have received this message in error, please notify Hunton & Williams LLP immediately by telephone ( 877-374-4937) and by electronic mail to: help

_ desk@hunton.com and then delete this message and all copies and backups thereof."Harrison, Craig" <charrison@hunton.com> 05/09/2007 01:26 PM To Christian Fellner/RTP/USEPA/US@EPA

cc "Lowell Smith \(E-mail\)" <lowellsmith1@cox.net>, RobertJ Wayland/RTP/USEPA/US@EPA, Rick Vetter/RTP/USEPA/US@EPA bcc Subject RE: Combustion Turbine Reconsideration Conference Call

Attached is a brief memo summarizing some possible methodologies for revising the NSPS so all CTs can comply. I think tomorrow's time would be best spent talking about data analysis issues and focusing on the NSPS for large gas-fired CTs when they operate in simple cycle mode. Lauren Freeman is the lead attorney for the remaining issues, and we may wish to have a call to address those at a later time. Craig.

-----Original Message----- From: Fellner.Christian@epamail.epa.gov [mailto:Fellner.Christian@epamail.epa.gov] Sent: Tuesday, May 08, 2007 3:12 PM To: Harrison, Craig Cc: Lowell Smith (E-mail); Wayland.Robertj@epamail.epa.gov; Vetter.Rick@epamail.epa.gov Subject: Combustion Turbine Reconsideration Conference Call

Craig, Do you have an agenda for Thursday's conference call on the stationary combustion turbine NSPS reconsideration? I am assuming you will want to discuss the issues raised in UARG's request for reconsideration. These would include: 1. The numerical NOx emissions standard and the averaging period and calculation methodology for units with NOx CEMS. 2. The use of acid rain CEMS calibration procedures. 3. Minor other issues including the ability to correct emissions data to 15% O2 and the rule language with respect to common steam headers. If I have missed anything please let me know. I have reviewed some NOx CEMS data and am getting different results from your analysis. This is the approach I have been using. I download the raw hourly data from the "prepackaged data sets" link from the CAMD we bsite, http://cfpub.epa.gov/gdm/index .cfm. I then use the "explode" program to get the text files and then import the data into excel. I use the unadjusted NOx emissions rate and match each hour to the hourly average fuel use, average load for the hour, and operating time for the hour. For each hour I determine the emissions standard that would apply. For average loads less than 75% and partial operating hours the standard is 96 ppm, and for hours burning over 50% oil (by heat input) the standard is 42 ppm. The remaining hours (greater than 75% load, complete hour of operation, greater than 50% natural gas) would beassigned a NOx emissions limit of 1 5 p pm . T his approach should be conservative since the highest emissions standard for any given hour applies. For example, if a source burned over 50% oil for the first 15 minutes of a clock hour, but then burns natural gas for the remainder of the hour the applicable ppm standard would still be 42 ppm. Similarly, if a source operates for any 15 minute period at less than 75% load the 96 ppm standard applies (it is not necessary that the average hour load be less than 75%). That is why partial operating hours automatically have an applicable standard of 96 ppm. I reviewed 2005 and 2006 NOx emissions data for Lagoon Creek 11, Rockingham 5, Trimble County 9, and Madison 2 and none of them had any input based excess emissions on a 4-hour rolling average. I reviewed both a continuous 4-hour rolling average and a separate 4-hour rolling average just using the 15 ppm hours. I also reviewed Lansing Smith 5 and it had 3 excess emissions, but operated 11,344 hours over 2005 and 2006. I plan on reviewing data from a few additional turbines prior to Thursday's call. If there are any particular turbines you would like to discuss on Thursday please let me know and I will take at a look at the appropriate emissions data. Thank you.

----------------------------------------------------------------------- Christian Fellner Energy Strategies Group Sector Policies and Programs Division Office of Air Quality and Planning Standards United States Environmental Protection Agency 919.541.4003 (phone) 919.541.5450 (fax)

### Page 1 

# LLS Consulting 24862 Luton, Laguna Hills, CA 92653 (949) 770-4349 

## TECHNICAL MEMORANDUM
May 8, 2007 TO: Craig S. Harrison, Hunton & Williams

FROM: Lowell L. Smith SUBJECT: Potential Large Simple Cycle Turbine Compliance Methodologies I identified 29 new large turbines to eval uate various methods of complying with the combustion turbine NSPS. I have applied six different potential simple cycle turbine NOx compliance methodologies to these 29 turbines to determine their impact on the ability of this large turbine category to co mply with the combustion turbine NOx NSPS. The following briefly describes each of these methodologies. Increase the Magnitude of the Limit This methodology would retain the 4-hour rolling average methodology in the current rule, and increase the magnitude of the input and output NSPS so that all new turbines would comply. In any event, the m agnitude of the output-based NSPS must be increased from 0.43 lb/MW-hr to 0.72 lb/M W-hr to correct the error in assumed efficiency of the final NSPS fo r large simple cycle turbines. 4-Hour Rolling Average This methodology rolls the NOx data in 4- hour averages within a calendar day. The current NSPS methodology divides the data into 24 hour daily periods. For this analysis I assumed that a minimum of 4 hours of va lid NOx data was required to constitute a valid day. This is a conservative estimate of the exceedences since the NSPS currently requires only 3 hours of valid data. Block 24-Hour Daily Averages This methodology breaks the data into 24- hour daily periods and averages the NOx data in that period to arrive at a 24-hour block NOx average. The assumption for this analysis was that a valid day consisted of a minimum of 4 hours of valid NOx data.

### Page 2 18-Hour Minimum Daily Averages The NOx data for the 29 turbines was analyzed according to what I assumed EPA meant in the Subpart Da methodology that it proposed in the recent reconsideration package. My interpretation of this methodology is that if a calendar day contains less than 18 hours of valid NOx dat a, NOx data from the following day(s) are used to populate the 18-hour period. This preserves the actual calendar day count and makes every day with at least 1 hour of data have a NOx average based upon at least 18 hours of valid NOx data. The positive aspect of th is new methodology is that all NOx data are used to show compliance. The negative side of this approach is that it uses more hours of data than truly exists to arrive at oper ating calendar day NOx averages. For example, assuming that every day had only one hour of NOx data and it operated 365 days a year, this methodology would use in excess of 8328 hours of data to characterize 365 hours of actual operating NOx emissions. This method departs from using an actual calendar day NOx data to characterize a daily NOx average. Once one uses data from the following day(s), it is irrelevant whet her one uses 18 hours or any other value since the new definition of a day does not preserve the actual natural daily variations. One could just as easily use a criterion of 24 hours as 18 hours since the hours do not represent anything associated with a true cal endar day. For that matter, one could use any number of hours as the criteria for this same reason. This methodology was used to construct days of data that contained a minimum of 18 hour of valid NOx data up to a maximum of 24 hours of valid NOx data. This resulted in NOx averages for all calendar days that had NOx emissions data. 24-Hour Minimum Daily Averages The number of actual calendar days in a year is preserved in the above 18-hour methodology, however, there is no real need to preserve the calendar day count since it now has no actual relevance. This is a totally different method from the current NSPS compliance method since it artificially construc ts a compliance day which, in the case of 30-day rolling averages, would result in 30- day average period potentially having many more hours than 720 hours. Since the compliance day in this new methodology has no real meaning related to actual calendar da ys in a year, a compliance day could be made 24 rather than 18 hours. Ther efore, instead of a minimum of 18 hour in a compliance day, I assumed that all compliance days woul d contain the same number of hours or 24. This methodology is the same as that for the 18 method above except that 24 hours were used to define all valid days. Pseudo 24-Hour Daily Averages As was pointed out in the discussion above, an actual day need not have any real meaning aside from the fact that it may c ontain a given number of hours of valid NOx

### Page 3 data. Consequently, a methodology could be der ived that artificially generates pseudo days of NOx data. These pseudo days of data could contain 24 hours of valid NOx data thus preserving at least the actual number of hours in a day. The departure here from the method proposed in the Subpart Da recons ideration is that one now would generate 24-hour pseudo days which would result in exac tly the total number of hours of actual NOx data, i.e., no data are repeated as in the two methods above. In this approach, I simply generated consec utive 24 hour periods which represented pseudo days 1 to x. This would result in fe wer days than the actual day count. In this method, all NOx averages consis ted of 24 hours of valid NOx data which did not contain any data from other pseudo days. I used this method to calculate pseudo 24 hour days. In all of the above analyses of the turbine CEMS data I intend to use real data to establish the methodologies that may result in compliance with the NOx NSPS."Harrison, Craig" <charrison@hunton.com> 05/01/2007 12:09 PM To Christian Fellner/RTP/USEPA/US@EPA

cc "Lowell Smith \(E-mail\)" <lowellsmith1@cox.net> bcc Subject RE: Combustion Turbine Reconsideration

Yes, this works perfectly. Right now we will have me and Lowell Smith on the call. If others decide to join I'll let you know. Craig -----Original Message----- From: Fellner.Christian@epamail.epa.gov [mailto:Fellner.Christian@epamail.epa.gov] Sent: Tuesday, May 01, 2007 11:53 AM To: Harrison, Craig Subject: RE: Combustion Turbine Reconsideration

Craig, How about May 10 from 1 to 2? If that works the call in number will be 919.541.4332.

Thanks.

----------------------------------------------------------------------- Christian Fellner Energy Strategies Group Sector Policies and Programs Division Office of Air Quality and Planning Standards United States Environmental Protection Agency 919.541.4003 (phone) 919.541.5450 (fax)

"Harrison, Craig" <charrison@hunto To n.com> Christian Fellner/RTP/USEPA/US@EPA 04/30/2007 09:56 cc AM Subject RE: Combustion Turbine ReconsiderationI'm not sure I responded. I think May 10 and 11, pretty much any time, works best for us. Craig -----Original Message----- From: Fellner.Christian@epamail.epa.gov [mailto:Fellner.Christian@epamail.epa.gov] Sent: Friday, April 27, 2007 4:06 PM To: Harrison, Craig Cc: Lowell Smith (E-mail); Wayland.Robertj@epamail.epa.gov Subject: Re: Combustion Turbine Reconsideration

Craig,

I have started to review additional CEMS emissions data and should have enough data together to have a useful phone conference anytime after next week. I plan on being in the office most of May so if you just send me some times that work for you I can check schedules here.

Thanks.

----------------------------------------------------------------------- Christian Fellner Energy Strategies Group Sector Policies and Programs Division Office of Air Quality and Planning Standards United States Environmental Protection Agency 919.541.4003 (phone) 919.541.5450 (fax)

"Harrison, Craig" <charrison@hunto To n.com> Christian Fellner/RTP/USEPA/US@EPA 04/27/2007 12:39 cc PM "Lowell Smith \(E-mail\)" <lowellsmith1@cox.net> Subject Combustion Turbine ReconsiderationChristian: We were wondering when you might begin to work on this issue. Lowell Smith has continued to do some emissions analyses, and it might be helpful if some time during the next few weeks we could have a short conference call with you to get some idea of where you might be heading and what we can do to provide technical support. Among the issues we would like to explore is whether you might be more interested in raising the magnitude of the NSPS or lengthening the averaging time to allow CTs to be in compliance.

Craig S. Harrison Counsel to UARG"Harrison, Craig" <charrison@hunton.com> 03/23/2007 02:55 PM To "Lowell L. Smith" <lowellsmith1@cox.net>, Christian Fellner/RTP/USEPA/US@EPA cc bcc Subject RE: CT NSPS



### Early May is fine with me. I suggest that we have a (possibly) brief conference call to see where all of us are on these issues before Lowell goes on vacation. We can circle back later if need be depending on what we learn from each other on the first call. Craig -----Original Message----- From: Lowell L. Smith [mailto:lowellsmith1@cox.net] Sent: Friday, March 23, 2007 1:52 PM To: Fellner.Christian@epamail.epa.gov Cc: Harrison, Craig Subject: RE: CT NSPS 

### Christian: I figured you would be busy with the SGU package until then. The first or second week of May works for me. I will be on vacation the week of the 13 th 

### through the 21st. Craig will let you know if the dates are OK with him.

Lowell

From: Fellner.Christian@epamail.epa.gov [ mailto:Fellner.Christian@epamail.epa.gov] Sent: Friday, March 23, 2007 8:47 A M To: Lowell L. Smith Subject: Re: CT NSPS



### Lowell, I do not plan on doing any additional work on the stationary combustion turbine N SPS reconsideration until after the final steam generating unit reconsideration p ackage is signed. The first week in May should work for me. That will give me time to get my notes and analysis together. Let me know if week works for you. Thank you.

----------------------------------------------------------------------- Christian Fellner Energy Strategies Group Sector Policies and Programs Division

### Office of Air Quality and Planning Standards United States Environmental Protection Agency 919.541.4003 ( p hone) 919.541.5450 (fax)

"Lowell L. Smith" <lowellsmith1@cox.net> 03/22/2007 11:06 AM MST

To Christian Fellner/RTP/USEPA/US@EPA

cc "Craig Harrison" <charrison@hunton.com> bcc Subject CT NSPS



### Christian: Â
I just discovered an calculation error in my analyses for the Combustion Turbine Petition for Reconsideration that was included as an attachment in the UARG Petition. Â
On Pages 13, 16 and 17 of my analyses (included in the Petition), I inadvertently used the proposed medium sized turbine output NOx limit of 1 .0 lb/MW-Hr to arrive at the conclusion that the large size turbine limit should have been set at 0.60 lb/MW-Hr. I should have used the medium sized turbine output NOx limit of 1.2 lb/MW-Hr for the Final Rule . With this correction, all mention of a 0.60 lb/MW-Hr limit in the text on these pages should be changed to 0.72 lb/MW-Hr. or 20 p ercent higher than shown in my memo. Â
Do you have any idea when EPA might begin to address the CT NSPS revisions? I have some analysis that might be of interest to you in your preparation of the CT N SPS Revisions. Craig Harrison would like to set up a conference call sometime in the near future to discuss these analyses and other issues related to the Combustion Turbine NSPS. Â

Lowell (949) 770-4349"Harrison, Craig" <charrison@hunton.com> 09/26/2006 01:53 PM To RobertJ Wayland/RTP/USEPA/US@EPA, Christian Fellner/RTP/USEPA/US@EPA cc "Freeman, Lauren" <lfreeman@hunton.com>, "Lowell Smith (E-mail)" <lowellsmith1@cox.net> bcc Subject Proposed Agenda for UARG- OAQPS Call History: This message has been forwarded.

### UARG-OAQPS Conference Call Petition for Reconsideration of Combustion Turbine Final NSPS Wednesday, September 27, 2006

3:00 p.m. - 4:00 p.m. Eastern Call in Number: (919) 541-4486

Participating for UARG : Craig S. Harrison (Hunton & Williams), Lauren Freeman (Hunton & Williams, by telephone), Lowell Smith (consultant) Participating for OAQPS : Robert Wayland, Christian Fellner, Richard Vetter

I. Achievability of NOx NSPS For La rge Simple Cycle Gas-Fired Turbines A. Methodology B. Results C. Efficiency Assumption II. Implications of Specifying Concentration Limits at 15% O 2 

### III. State Approval to Utilize Certain Part 75 Provisions IV. Methodology for Calculating Co mpliance When Different NSPS Apply

V. Common Steam Header Provisions

VI. Other Issues"Lowell L. Smith" <lowellsmith1@cox.net> 08/16/2007 11:23 AM To Christian Fellner/RTP/USEPA/US@EPA

cc "'Harrison, Craig'" <charrison@hunton.com>, "'Freeman, Lauren'" <lfreeman@hunton.com> bcc Subject CT NSPS Comments History: This message has been forwarded.



### Christian: Thanks for the information you provided regarding the methodology for the simple cycle turbine exceedences. As it turns out, my analysis that I performed after our last Email communication was almost identical to your methodology and I got the same general results. There are still a few turbines in my database of 29 turbines that have exceedences of the 4-hour standard but most of these turbines run for relatively short periods of time during the year (<100 hours). Based upon our discussions yesterday, I do not have any further questions on this subject nor do I intend to do any analysis other than that I have provided to you in the past.
Lowell L. Smith

PRIVILEGED AND CONFIDENTIAL -- ATTORNEY WORK PRODUCT -- PREPARED AT THE REQUEST OF COUNSEL"Lowell L. Smith" <lowellsmith1@cox.net> 06/22/2007 12:37 PM To Christian Fellner/RTP/USEPA/US@EPA

cc bcc Subject CT Unit Status



### Christian: For our call here is what I have extracted from your review. I also included the Manchief units which I don’t have your read on yet. One question is did you go through all of the data for these units or only the hours that I looked at. The reason that I ask is that I used a 4 hour rolling average but did not look back to see if there were periods of time that had 3 valid hours. I still need some assistance on how to interpret this caveat.
Lowell L. Smith

PRIVILEGED AND CONFIDENTIAL -- ATTORNEY WORK PRODUCT -- PREPARED AT THE REQUEST OF COUNSEL

### Results of EPA Review

Plant Unit Date Hou r Exclution reason

Audrai n 1 7/24/2006 16 Exceedence Audrain 1 7/24/2006 17 Exceedence

Heard 1 1/8/2003 8 Possible exceedence since hour 4 was at partial load
Hear 2 1/24/2003 10 Partial hour operation implying load possibly below 75%
Holden 1 1/23/2003 18 Hour 13 and 16 partial hours
Ladysmith 2 1/17/2004 7 Round down to 15 ppm Ladysmith 2 1/17/2004 8 Round down to 15 ppm - Rounds up to 16 Ladysmith 2 12/20/2004 5 Round down to 15 ppm
Lansing Smith 4 2/20/2003 4 Exceedence Lansing Smith 4 2/20/2003 9 Exceedence Lansing Smith 4 2/20/2003 10 Exceedence Lansing Smith 4 2/20/2003 20 Exceedence Lansing Smith 4 3/11/2004 9 Partial hour operation implying load possibly below 75% Lansing Smith 4 3/11/2004 8 Partial hour operation implying load possibly below 75%
Lansing Smith 5 9/13/2003 15 Exceedence Lansing Smith 5 9/13/2003 16 Exceedence

Manchief 1 030128 20 Manchief 1 030223 21 Manchief 1 031103 20 Manchief 1 031204 15 Manchief 1 040106 8 Manchief 1 040212 22 Manchief 1 041122 21 Manchief 1 050117 21 Manchief 1 050620 12 Manchief 1 051217 20 Manchief 1 051218 20

Manchief 2 030122 17 Manchief 2 030125 9 Manchief 2 030207 12 Manchief 2 030208 21 Manchief 2 030212 8 Manchief 2 030218 17 Manchief 2 030305 9

### Manchief 2 030312 9 Manchief 2 030314 9 Manchief 2 030317 18 Manchief 2 030317 19 Manchief 2 030317 20 Manchief 2 030327 17 Manchief 2 030708 19 Manchief 2 030708 20 Manchief 2 030717 20 Manchief 2 031122 18 Manchief 2 031122 19 Manchief 2 031122 20 Manchief 2 031122 21 Manchief 2 031123 20 Manchief 2 031205 11 Manchief 2 031205 12 Manchief 2 031205 13 Manchief 2 040105 11 Manchief 2 040105 12 Manchief 2 040105 18 Manchief 2 040105 19 Manchief 2 040105 20 Manchief 2 040105 21 Manchief 2 040106 20 Manchief 2 041102 10 Manchief 2 041130 12 Manchief 2 050117 19 050117 20
Remington 1 5/15/2004 16 Partial hour operation implying load possibly below 75%
Rockingham 3 5/27/2004 15 Partial hour operation implying load possibly below 75% Rockingham 3 6/17/2004 12 Partial hour operation implying load possibly below 75% Rockingham 3 6/17/2004 13 Partial hour operation implying load possibly below 75% Rockingham 3 6/17/2004 14 Partial hour operation implying load possibly below 75%
Rockingham 5 7/19/2005 15 Partial hour operation implying load possibly below 75% Rockingha m 5 7/19/2005 18 Partial hour operation implying load possibly below 75 %"Lowell L. Smith" <lowellsmith1@cox.net> 06/21/2007 04:01 PM To Christian Fellner/RTP/USEPA/US@EPA

cc bcc Subject RE: Turbine NSPS

Christian: Craig will not be available but he said you and I could handle it alone.

Lowell L. Smith

PRIVILEGED AND CONFIDENTIAL -- ATTORNEY WORK PRODUCT -- PREPARED AT THE REQUEST OF COUNSEL

-----Original Message----- From: Fellner.Christian@epamail.epa.gov [mailto:Fellner.Christian@epamail.epa.gov] Sent: Thursday, June 21, 2007 12:58 PM To: Lowell L. Smith Subject: RE: Turbine NSPS
Lowell, I let Bob and Rick (the attorney) know about the call, but I am not sure if they will participate or not.

Thanks.

----------------------------------------------------------------------- Christian Fellner Energy Strategies Group Sector Policies and Programs Division Office of Air Quality and Planning Standards United States Environmental Protection Agency 919.541.4003 (phone) 919.541.5450 (fax)

"Lowell L. Smith" <lowellsmith1@co To x.net> Christian Fellner/RTP/USEPA/US@EPA 06/21/2007 12:08 cc PM Subject RE: Turbine NSPSChristian: That sounds good to me. Is it just you an me on the call?

Lowell L. Smith PRIVILEGED AND CONFIDENTIAL -- ATTORNEY WORK PRODUCT -- PREPARED AT THE REQUEST OF COUNSEL -----Original Message----- From: Fellner.Christian@epamail.epa.gov [mailto:Fellner.Christian@epamail.epa.gov] Sent: Thursday, June 21, 2007 8:04 AM To: Lowell L. Smith Cc: Craig Harrison Subject: Re: Turbine NSPS
Lowell, How about we have a conference call on Friday (22 June) from 1:30 to 2:30 east coast time. The conference line number is 919.541.4332. I did a check for additional DLN turbine models using NOx CEMS with permit requirements of less than or equal to 15 ppm NOx, but have bot been able to find many. Most of the new simple cycle turbine I have seen are either GE frame 7 turbines or have SCR. If you know of any please let me know. So far I think I have the same list as you:

Audrain 1- 8: GE PG7121EA Heard 1-3: Siemens 501F Holden 1-3: Siemens V84.2 Lady Smith 1-2: GE PG7241FA Lansing Smith 4 - 5: GE PG7241FA Manchief 1-2: Siemens V84.3A1 Remington 1-4: GE PG7241FA Rockingham 1-5: Siemens 501F

Thanks.

----------------------------------------------------------------------- Christian Fellner Energy Strategies Group Sector Policies and Programs Division Office of Air Quality and Planning Standards United States Environmental Protection Agency 919.541.4003 (phone) 919.541.5450 (fax)

"Lowell L. Smith" <lowellsmith1@co To x.net> ChristianF ellner / R TP / U SEPA / U S @ E PA 06/20/2007 09:50 cc PM "Craig Harrison" <charrison@hunton.com> Subject Turbine NSPS

Christian: Sorry I haven’t gotten back to you but I was asked to look at some other rulemaking. Any progress on your evaluation? Do you have any other data that I should look at? Can we set up a time to discuss the issues either later this week or next week? Here’s my schedule June 21 – Free all day 22 – before 3:00 EDT 25 – Free all day 26 – before 3:00 EDT 27 – before noon and after 3:00 EDT 28 – Free all day

Lowell L. Smith

PRIVILEGED AND CONFIDENTIAL -- ATTORNEY WORK PRODUCT -- PREPARED AT THE REQUEST OF COUNSEL"Lowell L. Smith" <lowellsmith1@cox.net> 05/31/2007 01:51 PM To Christian Fellner/RTP/USEPA/US@EPA

cc bcc Subject RE: Turbine NSPS

Christian: I will look at the Manchief Units 1 & 2 and send you the results. Am I correct in assuming that is one reason for an exceedence is a partial hour and that that hour is excluded?

I don't remember if we discussed in detail the alternate methods that I have used to analyze the units but are you open to considering other ways to met compliance with a 15 ppm limit? The ways I would suggest are: 1) Straight Rolling average with an increased averaging time (i.e., 24 hour or higher), 2) 24 hour Block average, 3) 24 hour block average for consecutive 24 hour periods 4) The Da approach, 5) The pseudo day approach, and any others that might be appropriate. I'll be back with you probably Monday of next week.

Lowell -----Original Message----- From: Fellner.Christian@epamail.epa.gov [mailto:Fellner.Christian@epamail.epa.gov] Sent: Tuesday, May 29, 2007 11:16 AM To: Lowell L. Smith Subject: Re: Turbine NSPS
Lowell, I am still checking through additional turbines, but looked at all the 4 hour exceedences you sent earlier. Here are my initial thoughts. Audrain 1 hours 16 and 17 on 24 July 2006 appear like hours that would require an exceedence report. Heard 1 hour 8 on 18 January 2003 appears like an hour that would require an exceedence report. It is possible that hour 5 had some period of operation below 75% load since the turbine only operated at an average load of 26% during hour 4. If this were the case, then no exceedence report would be necessary. Holden 1 hour 18 on 23 January 2003 would not require an exceedence report. Hours 13 and 16 are partial load hours (I am not sure why these two hours are not in your memo). In addition, it is possible that hour 11 had some period of part load operation since the turbine only operated during hour 10 at an average load of 44%. (Embedded image moved to file: pic02607.jpg)

Lansing Smith 4 hours 9 and 10 on 20 February 2003 appear like hours that would require an exceedence report, but hours 8 and 9 from 11 March2004 would not. Hours 5, 8, a nd 9 o n 1 1 M arch 2 004 a re partial loa d hours. (Embedded image moved to file: pic02483.jpg)

Lansing Smith 5 hours 15 and 16 on 13 September 2003 appear like hours that would require an exceedence report. Remington 1 hour 16 on 15 May 2004 would not require reporting since hour 13 is a partial load hour. (Embedded image moved to file: pic00911.jpg) Rockingham 5 hours 15 and 18 on 19 July 2005 hour 11 on 26 July 2005 would not require reporting. Hours 12 and 18 on 19 July and hour 8 on 26 July are partial load hours. (Embedded image moved to file: pic11635.jpg)

If you identify additional hours you think would require an exceedence report please let me know. The intent of the rule is to require units with NOx CEMS to calculate excess emissions each hour. Simple cycle units would use a 4-hour continuous rolling average and units with heat recovery would use a 30-day average. For a simple cycle turbine, a 4-hour average might span multiple operating days.

Thanks.

----------------------------------------------------------------------- Christian Fellner Energy Strategies Group Sector Policies and Programs Division Office of Air Quality and Planning Standards United States Environmental Protection Agency 919.541.4003 (phone) 919.541.5450 (fax)

"Lowell L. Smith" <lowellsmith1@co To x.net> Christian Fellner/RTP/USEPA/US@EPA 05/22/2007 01:42 cc PM Subject Turbine NSPSChristian: I'm back from my vacation. Any time you want to discuss the data, let me know.

Lowell"Lowell L. Smith" <lowellsmith1@cox.net> 05/31/2007 03:01 PM To Christian Fellner/RTP/USEPA/US@EPA

cc bcc Subject Manchief Units



### Christian: The two XL files contain periods that I think would be exceedences of the 4-Hour input standard. Manchief 1 has 19 and Manchief 2 has 45 but possibly 12 of these would be due to CEMS malfunction. Let me know what you think.

LowellManchief Unit 1 Exceedences

UnitID Date Hour Seq GrossLoad LoadRange OperTime Noc 4-Hr Avg FFactor MethodCode HourlyHI AvgO2 AvgNoxppm Noc

CT1 030101 17 1 120 8 1.00 18.6 8710 1 1213 14.6 19.8 18.6 CT1 030101 18 2 121 8 1.00 14.7 8710 1 1213 14.6 15.7 14.7 CT1 030101 19 3 122 8 1.00 14.4 8710 1 1216 14.6 15.4 14.4 CT1 030101 20 4 122 8 1.00 14.0 15.4 8710 1 1215 14.6 14.9 14.0

CT1 030128 17 195 125 8 1.00 26.7 8710 1 1271 14.2 30.3 26.7 CT1 030128 18 196 123 8 1.00 13.4 8710 1 1234 14.7 14.1 13.4 CT1 030128 19 197 115 8 1.00 13.7 8710 1 1169 14.8 14.2 13.7 CT1 030128 20 198 113 7 1.00 13.8 16.9 8710 1 1157 14.8 14.3 13.8

CT1 030223 17 339 126 8 1.00 24.0 8710 1 1274 14.8 24.8 24.0 CT1 030223 18 340 149 10 1.00 12.9 8710 1 1425 14.3 14.4 12.9 CT1 030223 20 341 159 10 1.00 14.2 8710 1 1520 14.3 15.9 14.2 CT1 030223 21 342 160 10 1.00 14.5 16.4 8710 1 1509 14.3 16.2 14.5 CT1 030223 22 343 157 10 1.00 14.6 14.1 8710 1 1479 14.3 16.3 14.6

CT1 030303 17 411 116 8 1.00 19.9 8710 1 1189 14.6 21.2 19.9 CT1 030303 18 412 135 9 1.00 12.9 8710 1 1323 14.3 14.4 12.9 CT1 030303 19 413 121 8 1.00 13.6 8710 1 1214 14.4 15 13.6 CT1 030303 20 414 113 7 1.00 13.6 15.01 8710 1 1153 14.4 15 13.6

CT1 031103 17 1243 116 8 1.00 24.8 8710 1 1195 14.8 25.6 24.8 CT1 031103 18 1244 128 8 1.00 13.6 8710 1 1278 14.6 14.5 13.6 CT1 031103 19 1245 135 9 1.00 13.5 8710 1 1330 14.6 14.4 13.5 CT1 031103 20 1246 136 9 1.00 13.3 16.3 8710 1 1334 14.6 14.2 13.3 CT1 031103 21 1247 122 8 1.00 13.7 13.5 8710 1 1233 14.7 14.4 13.7 CT1 031103 22 1248 121 8 1.00 13.4 13.5 8710 1 1222 14.7 14.1 13.4 CT1 031103 23 1249 117 8 1.00 14.3 13.7 8710 1 1186 14.7 15 14.3

CT1 031204 12 1370 106 7 1.00 31.3 8710 1 1149 15.6 28.2 31.3 CT1 031204 13 1371 117 8 1.00 16.7 8710 1 1218 14.7 17.5 16.7 CT1 031204 14 1372 116 8 1.00 15.1 8710 1 1201 14.8 15.6 15.1 CT1 031204 15 1373 112 7 1.00 14.8 19.5 8710 1 1180 14.8 15.3 14.8 CT1 031204 16 1374 114 8 1.00 14.5 15.3 8710 1 1196 14.8 15 14.5 CT1 031204 17 1375 116 8 1.00 14.1 14.6 8710 1 1207 14.8 14.6 14.1 CT1 031204 18 1376 115 8 1.00 14.2 14.4 8710 1 1202 14.8 14.7 14.2 CT1 031204 19 1377 119 8 1.00 14.1 14.2 8710 1 1232 14.7 14.8 14.1 CT1 031204 20 1378 133 9 1.00 12.8 13.8 8710 1 1344 14.7 13.4 12.8 CT1 031204 21 1379 130 9 1.00 13.1 13.6 8710 1 1314 14.7 13.8 13.1 CT1 031204 22 1380 112 7 1.00 15.2 13.8 8710 1 1180 14.8 15.7 15.2

CT1 040106 5 1431 118 8 1.00 30.3 8710 1 1228 14.9 30.8 30.3 CT1 040106 6 1432 160 10 1.00 14.9 8710 1 1542 14.3 16.6 14.9 CT1 040106 7 1433 160 10 1.00 14.9 8710 1 1539 14.3 16.6 14.9 CT1 040106 8 1434 157 10 1.00 14.6 18.7 8710 1 1516 14.3 16.3 14.6 CT1 040106 9 1435 156 10 1.00 14.6 14.7 8710 1 1511 14.4 16.1 14.6 CT1 040106 10 1436 153 10 1.00 14.7 14.7 8710 1 1483 14.4 16.2 14.7 CT1 040106 11 1437 152 10 1.00 14.5 14.6 8710 1 1482 14.4 16 14.5 CT1 040106 12 1438 150 10 1.00 14.6 14.6 8710 1 1461 14.4 16.1 14.6 CT1 040106 13 1439 150 10 1.00 14.2 14.5 8710 1 1463 14.4 15.6 14.2CT1 040106 14 1440 150 10 1.00 14.2 14.4 8710 1 1463 14.4 15.6 14.2 CT1 040106 15 1441 150 10 1.00 14.3 14.3 8710 1 1459 14.4 15.7 14.3 CT1 040106 16 1442 151 10 1.00 14.4 14.3 8710 1 1464 14.4 15.8 14.4 CT1 040106 17 1443 150 10 1.00 14.4 14.3 8710 1 1465 14.4 15.8 14.4 CT1 040106 18 1444 137 9 0.25 13.6 14.2 8710 1 1330 14.4 15 13.6

CT1 040212 18 1459 129 8 1.00 13.8 8710 1 1291 14.2 15.6 13.8 CT1 040212 19 1460 130 9 1.00 13.5 8710 1 1293 14.3 15.1 13.5 CT1 040212 20 1461 138 9 1.00 12.7 8710 1 1350 14.4 14 12.7 CT1 040212 21 1462 130 9 1.00 13.8 13.5 8710 1 1298 14.4 15.2 13.8 CT1 040212 22 1463 116 8 1.00 22.9 15.8 8710 1 1195 14.8 23.7 22.9

CT1 041122 17 1586 135 9 1.00 17.6 8710 1 1335 14.4 19.4 17.6 CT1 041122 18 1587 116 7 1.00 14.2 8710 1 1191 15 14.2 14.2 CT1 041122 19 1588 121 8 1.00 14.5 8710 1 1234 15.3 13.8 14.5 CT1 041122 20 1589 117 7 1.00 14.0 15.1 8710 1 1194 15.3 13.3 14.0 CT1 041122 21 1590 112 7 1.00 19.3 15.5 8710 1 1153 15.4 18 19.3

CT1 050117 16 1646 142 9 1.00 17.1 8710 1 1400 14.4 18.8 17.1 CT1 050117 17 1647 146 9 1.00 14.4 8710 1 1424 14.3 16.1 14.4 CT1 050117 18 1648 148 9 1.00 15.0 8710 1 1438 14.3 16.8 15.0 CT1 050117 19 1649 150 9 1.00 13.6 15.04 8710 1 1452 14.3 15.2 13.6 CT1 050117 20 1650 152 10 1.00 14.9 14.5 8710 1 1469 14.2 16.9 14.9 CT1 050117 21 1651 113 7 1.00 21.7 16.3 8710 1 1166 14.6 23.1 21.7

CT1 050620 9 1661 76 5 1.00 40.4 8710 1 1675 16.2 32.3 40.4 CT1 050620 10 1662 125 8 1.00 17.8 8710 1 1703 14.8 18.4 17.8 CT1 050620 11 1663 117 7 1.00 13.5 8710 1 1704 11.7 21 13.5 CT1 050620 12 1664 99 6 1.00 22.2 23.5 8710 1 1696 14.5 24 22.2

CT1 050624 9 1666 74 5 1.00 27.8 8710 1 1636 15.2 26.9 27.8 CT1 050624 10 1667 102 7 1.00 13.9 8710 1 1655 14.3 15.5 13.9 CT1 050624 11 1668 119 8 1.00 13.7 8710 1 1655 14.1 15.7 13.7 CT1 050624 12 1669 105 7 1.00 13.3 17.2 8710 1 1655 14.2 15.1 13.3 CT1 050624 13 1670 91 6 1.00 13.0 13.5 8710 1 1655 14.3 14.5 13.0 CT1 050624 14 1671 109 7 1.00 8.4 12.1 8710 1 1655 14.2 9.5 8.4 CT1 050624 15 1672 44 3 0.50 28.1 15.7 8710 1 1635 15.9 23.9 28.1

CT1 050804 12 1751 123 8 1.00 11.5 8710 1 1267 14.6 12.3 11.5 CT1 050804 13 1752 139 9 1.00 11.4 8710 1 1396 14.5 12.4 11.4 CT1 050804 14 1753 138 9 1.00 11.6 8710 1 1386 14.5 12.6 11.6 CT1 050804 15 1754 121 8 1.00 11.6 11.6 8710 1 1253 14.6 12.4 11.6 CT1 050804 16 1755 46 3 0.25 32.8 16.9 8710 1 1351 16.3 25.7 32.8

CT1 051217 17 1853 119 8 1.00 35.2 8710 1 1172 15.2 34 35.2 CT1 051217 18 1854 128 8 1.00 14.4 8710 1 1222 14.6 15.4 14.4 CT1 051217 19 1855 123 8 1.00 14.8 8710 1 1185 14.7 15.5 14.8 CT1 051217 20 1856 123 8 1.00 14.6 19.7 8710 1 1184 14.7 15.3 14.6

CT1 051218 17 1857 119 8 1.00 31.2 8710 1 1170 15.1 30.7 31.2 CT1 051218 18 1858 123 8 1.00 13.3 8710 1 1189 14.8 13.7 13.3 CT1 051218 19 1859 123 8 1.00 14.2 8710 1 1186 14.8 14.7 14.2 CT1 051218 20 1860 124 8 1.00 13.8 18.1 8710 1 1198 14.8 14.3 13.8Manchief Unit 2 Exceedences

UnitID Date Hour Seq GrossLoad LoadRange OperTime Noc 4-Hr Avg FFactor MethodCode HourlyHI AvgO2 AvgNoxppm Noc

CT2 030122 14 181 143 9 1 23.7 8710 1 1388.2 14.5 25.7 23.7 CT2 030122 15 182 146 10 1 14.7 8710 1 1405.8 14.5 15.9 14.7 CT2 030122 16 183 146 10 1 14.7 8710 1 1406 14.5 15.9 14.7 CT2 030122 17 184 146 10 1 14.8 17.0 8710 1 1406.8 14.5 16 14.8 CT2 030122 18 185 146 10 1 14.5 14.7 8710 1 1404.8 14.5 15.7 14.5 CT2 030122 19 186 146 10 1 14.4 14.6 8710 1 1404.1 14.5 15.6 14.4 CT2 030122 20 187 146 9 1 14.3 14.5 8710 1 1404.1 14.5 15.5 14.3 CT2 030122 21 188 145 9 1 14.2 14.4 8710 1 1402.2 14.5 15.4 14.2 CT2 030122 22 189 144 9 1 14.5 14.4 8710 1 1388.9 14.5 15.7 14.5 CT2 030122 23 190 145 9 1 14.6 8710 1 1395.8 14.5 15.8 14.6

CT2 030125 6 222 128 8 1 34.2 8710 1 1284.4 14.5 37.1 34.2 CT2 030125 7 223 121 8 1 14.1 8710 1 1226.8 14.4 15.5 14.1 CT2 030125 8 224 127 8 1 13.9 8710 1 1268.5 14.7 14.6 13.9 CT2 030125 9 225 124 8 1 13.3 18.9 8710 1 1246.3 14.8 13.7 13.3 CT2 030125 10 226 125 8 1 13.3 13.6 8710 1 1260 14.8 13.7 13.3 CT2 030125 11 227 124 8 1 13.8 13.6 8710 1 1244.7 14.8 14.3 13.8 CT2 030125 12 228 122 8 1 13.9 13.6 8710 1 1228.8 14.9 14.1 13.9 CT2 030125 13 229 122 8 1 13.6 13.6 8710 1 1231.6 14.7 14.3 13.6 CT2 030125 14 230 123 8 1 13.5 13.7 8710 1 1232.1 14.8 14 13.5 CT2 030125 15 231 124 8 1 13.7 13.7 8710 1 1245.7 14.6 14.6 13.7 CT2 030125 16 232 128 8 1 13.6 13.6 8710 1 1281.1 14.4 15 13.6 CT2 030125 17 233 128 8 1 13.7 13.6 8710 1 1283.9 14.4 15.1 13.7 CT2 030125 18 234 123 8 1 13.9 13.7 8710 1 1239.3 14.6 14.8 13.9 CT2 030125 19 235 122 8 1 13.2 13.6 8710 1 1230.7 14.8 13.6 13.2 CT2 030125 20 236 122 8 1 13.6 13.6 8710 1 1229.5 14.8 14.1 13.6

CT2 030207 9 274 116 8 1 42.2 8710 1 1194.2 15 42.2 42.2 CT2 030207 10 275 141 9 1 14.7 8710 1 1366.4 14.7 15.4 14.7 CT2 030207 11 276 139 9 1 14.4 8710 1 1350.3 14.7 15.1 14.4 CT2 030207 12 277 128 8 1 15.0 21.6 8710 1 1261.9 14.7 15.7 15.0 CT2 030207 13 278 126 8 1 14.7 14.7 8710 1 1250.9 14.7 15.4 14.7 CT2 030207 14 279 125 8 1 14.2 14.5 8710 1 1238.9 14.7 14.9 14.2 CT2 030207 15 280 122 8 1 14.6 14.6 8710 1 1213 14.7 15.3 14.6 CT2 030207 16 281 123 8 1 14.1 14.4 8710 1 1221.5 14.7 14.8 14.1 CT2 030207 17 282 124 8 1 13.2 14.0 8710 1 1227.7 14.6 14.1 13.2 CT2 030207 18 283 122 8 1 14.2 14.0 8710 1 1216.8 14.6 15.1 14.2 CT2 030207 19 284 122 8 1 15.0 14.1 8710 1 1213.5 14.6 16 15.0 CT2 030207 20 285 121 8 1 15.1 14.4 8710 1 1207.6 14.6 16.1 15.1 CT2 030207 21 286 122 8 1 15.0 14.8 8710 1 1220.2 14.5 16.2 15.0

CT2 030208 18 287 120 8 1 23.2 8710 1 1211.4 14.7 24.4 23.2 CT2 030208 19 288 122 8 1 13.7 8710 1 1216.9 14.6 14.6 13.7 CT2 030208 20 289 122 8 1 13.7 8710 1 1216 14.6 14.6 13.7 CT2 030208 21 290 115 8 1 15.6 16.6 8710 1 1164.7 14.7 16.4 15.6

CT2 030212 5 325 112 7 1 37.3 8710 1 1163.5 15 37.3 37.3 CT2 030212 6 326 131 9 1 14.3 8710 1 1291.8 14.7 15 14.3 CT2 030212 7 327 129 8 1 14.4 8710 1 1273.1 14.6 15.4 14.4 CT2 030212 8 328 131 9 1 14.2 20.0 8710 1 1292.5 14.6 15.1 14.2 CT2 030212 9 329 131 9 1 14.2 14.3 8710 1 1297.3 14.7 14.9 14.2CT2 030212 10 330 128 8 1 13.9 14.2 8710 1 1284.6 14.7 14.6 13.9 CT2 030212 11 331 127 8 1 12.2 13.6 8710 1 1273.3 14.7 12.8 12.2 CT2 030212 12 332 121 8 1 12.7 13.2 8710 1 1229.7 14.7 13.3 12.7 CT2 030212 13 333 122 8 1 12.7 12.9 8710 1 1233.6 14.8 13.1 12.7 CT2 030212 14 334 122 8 1 13.4 12.7 8710 1 1224.6 14.8 13.8 13.4 CT2 030212 15 335 122 8 1 14.3 13.2 8710 1 1231.1 14.4 15.7 14.3 CT2 030212 16 336 114 8 1 14.0 13.6 8710 1 1171.6 14.4 15.4 14.0 CT2 030212 17 337 118 8 1 14.2 14.0 8710 1 1199.6 14.4 15.6 14.2 CT2 030212 18 338 126 8 1 14.4 14.2 8710 1 1266.5 14.4 15.8 14.4 CT2 030212 19 339 122 8 1 14.3 14.2 8710 1 1232.4 14.6 15.2 14.3 CT2 030212 20 340 120 8 1 13.7 14.1 8710 1 1216 14.7 14.4 13.7

CT2 030218 14 391 127 8 1 114.3 8710 1 1273.6 14.7 120 114.3 CT2 030218 15 392 116 8 1 14.0 8710 1 1185.2 14.7 14.7 14.0 CT2 030218 16 393 113 8 1 14.1 8710 1 1166.4 14.7 14.8 14.1 CT2 030218 17 394 122 8 1 13.8 39.0 8710 1 1230 14.7 14.5 13.8 CT2 030218 18 395 118 8 1 13.3 13.8 8710 1 1195.9 14.7 14 13.3 CT2 030218 19 396 117 8 1 13.0 13.5 8710 1 1191.6 14.7 13.6 13.0 CT2 030218 20 397 126 8 1 11.0 12.8 8710 1 1264.3 14.7 11.6 11.0 CT2 030218 21 398 125 8 1 11.1 12.1 8710 1 1253 14.7 11.7 11.1

CT2 030305 6 482 118 8 1 36.1 8710 1 1200.2 14.8 37.3 36.1 CT2 030305 7 483 140 9 1 14.2 8710 1 1353.1 14.5 15.4 14.2 CT2 030305 8 484 135 9 1 15.0 8710 1 1316.1 14.5 16.2 15.0 CT2 030305 9 485 125 8 1 14.3 19.9 8710 1 1234.4 14.5 15.5 14.3 CT2 030305 10 486 125 8 1 14.3 14.5 8710 1 1234.5 14.6 15.3 14.3 CT2 030305 11 487 124 8 1 14.8 14.6 8710 1 1230.3 14.6 15.8 14.8 CT2 030305 12 488 122 8 1 14.3 14.4 8710 1 1210.6 14.6 15.2 14.3 CT2 030305 13 489 123 8 1 13.8 14.3 8710 1 1219.9 14.6 14.7 13.8 CT2 030305 14 490 118 8 1 14.3 14.3 8710 1 1182.9 14.6 15.3 14.3 CT2 030305 15 491 118 8 1 14.3 14.2 8710 1 1184.5 14.7 15 14.3 CT2 030305 16 492 118 8 1 14.4 14.2 8710 1 1181.6 14.7 15.1 14.4 CT2 030305 17 493 118 8 1 14.2 14.3 8710 1 1186 14.6 15.1 14.2 CT2 030305 18 494 126 8 1 13.1 14.0 8710 1 1246.4 14.6 14 13.1 CT2 030305 19 495 130 9 1 12.5 13.5 8710 1 1286.1 14.6 13.3 12.5 CT2 030305 20 496 127 8 1 12.9 13.2 8710 1 1266.6 14.6 13.8 12.9 CT2 030305 21 497 126 8 1 13.1 12.9 8710 1 1257.3 14.6 14 13.1 CT2 030305 22 498 116 8 1 16.8 13.8 8710 1 1184.2 14.7 17.6 16.8

CT2 030312 6 554 124 8 1 27.8 8710 1 1261.5 14.8 28.7 27.8 CT2 030312 7 555 122 8 1 14.4 8710 1 1239.3 14.8 14.9 14.4 CT2 030312 8 556 113 7 1 14.6 8710 1 1164.6 14.8 15.1 14.6 CT2 030312 9 557 120 8 1 13.8 17.7 8710 1 1231.8 14.5 15 13.8 CT2 030312 10 558 117 8 1 14.0 14.2 8710 1 1204.5 14.5 15.2 14.0 CT2 030312 11 559 126 8 1 13.8 14.1 8710 1 1275.8 14.5 15 13.8 CT2 030312 12 560 128 8 1 14.2 14.0 8710 1 1288.1 14.5 15.4 14.2 CT2 030312 13 561 121 8 1 14.1 14.1 8710 1 1230.8 14.5 15.3 14.1 CT2 030312 14 562 111 7 1 14.2 14.1 8710 1 1151.8 14.6 15.1 14.2 CT2 030312 18 563 127 8 1 13.8 14.1 8710 1 1281.1 14.5 14.9 13.8 CT2 030312 19 564 114 8 1 14.1 14.0 8710 1 1176.8 14.6 15 14.1 CT2 030312 20 565 124 8 1 14.4 14.1 8710 1 1248.7 14.6 15.4 14.4

CT2 030314 6 569 119 8 1 30.5 8710 1 1216.6 15.1 30 30.5 CT2 030314 7 570 126 8 1 13.5 8710 1 1254.6 14.8 14 13.5 CT2 030314 8 571 125 8 1 13.6 8710 1 1248.9 14.9 13.8 13.6CT2 030314 9 572 123 8 1 12.8 17.6 8710 1 1233.7 14.9 13 12.8 CT2 030314 10 573 124 8 1 12.2 13.0 8710 1 1251.9 14.5 13.2 12.2

CT2 030317 6 581 117 8 1 14.5 8710 1 1190.5 14.6 15.5 14.5 CT2 030317 7 582 117 8 1 14.8 8710 1 1188.3 14.7 15.5 14.8 CT2 030317 8 583 117 8 1 14.1 8710 1 1191.5 14.7 14.8 14.1 CT2 030317 9 584 122 8 1 13.9 14.3 8710 1 1232.1 14.6 14.8 13.9 CT2 030317 10 585 116 8 1 13.6 14.1 8710 1 1186.1 14.3 15.2 13.6 CT2 030317 11 586 123 8 1 13.3 13.7 8710 1 1233.8 14.3 14.8 13.3 CT2 030317 13 587 112 7 1 13.5 13.6 8710 1 1154.4 14.4 14.9 13.5 CT2 030317 18 588 125 8 1 107.5 37.0 8710 1 1252.6 14.3 120 107.5 CT2 030317 19 589 115 8 1 13.9 37.0 8710 1 1178.3 14.3 15.5 13.9 CT2 030317 20 590 118 8 1 11.2 36.5 8710 1 1190.7 14.6 11.9 11.2

CT2 030327 14 652 131 9 1 26.2 8710 1 1306.9 14.5 28.4 26.2 CT2 030327 15 653 129 8 1 14.0 8710 1 1279.2 14.5 15.2 14.0 CT2 030327 16 654 119 8 1 14.5 8710 1 1202.2 14.5 15.7 14.5 CT2 030327 17 655 119 8 1 14.4 17.3 8710 1 1201.9 14.5 15.6 14.4 CT2 030327 18 656 121 8 1 14.0 14.2 8710 1 1216.6 14.5 15.2 14.0 CT2 030327 19 657 129 8 1 12.4 13.8 8710 1 1276.2 14.5 13.4 12.4 CT2 030327 20 658 127 8 1 12.6 13.4 8710 1 1259.1 14.5 13.7 12.6 CT2 030327 21 659 115 8 1 14.5 13.4 8710 1 1177 14.5 15.7 14.5

CT2 030708 10 803 118 8 1 14.5 8710 1 1209.7 14.4 15.9 14.5 CT2 030708 11 804 120 8 1 14.0 8710 1 1226.1 14.3 15.6 14.0 CT2 030708 12 805 129 8 1 14.0 8710 1 1290 14.3 15.6 14.0 CT2 030708 13 806 130 9 1 14.3 14.2 8710 1 1303.6 14.2 16.2 14.3 CT2 030708 14 807 131 9 1 13.9 14.0 8710 1 1305.1 14.2 15.8 13.9 CT2 030708 15 808 131 9 1 14.0 14.1 8710 1 1298.6 14.2 15.9 14.0 CT2 030708 16 809 127 8 1 13.2 13.9 8710 1 1270.3 14.2 15 13.2 CT2 030708 17 810 130 9 1 13.1 13.6 8710 1 1294.4 14.2 14.9 13.1 CT2 030708 18 811 130 9 1 13.1 13.4 8710 1 1297.6 14.2 14.9 13.1 CT2 030708 19 812 132 9 1 105.9 36.4 8710 1 1306.6 14.2 120 105.9 CT2 030708 20 813 113 7 1 13.6 36.4 8710 1 1162.3 14.3 15.2 13.6

CT2 030717 9 890 112 7 1 14.1 8710 1 1151.7 14.4 15.5 14.1 CT2 030717 12 891 115 8 1 13.2 8710 1 1176.2 14.5 14.3 13.2 CT2 030717 13 892 129 8 1 13.0 8710 1 1282.3 14.2 14.7 13.0 CT2 030717 18 893 116 8 1 12.8 13.3 8710 1 1187.7 14.4 14.1 12.8 CT2 030717 19 894 132 9 1 13.7 13.2 8710 1 1310.1 14.2 15.5 13.7 CT2 030717 20 895 130 9 1 105.9 36.3 8710 1 1299.1 14.2 120 105.9

CT2 031102 17 1192 127 8 1 18.0 8710 1 1285.7 14.7 18.9 18.0 CT2 031102 18 1193 126 8 1 14.6 8710 1 1265.4 14.6 15.6 14.6 CT2 031102 19 1194 125 8 1 14.5 8710 1 1258.5 14.6 15.5 14.5 CT2 031102 20 1195 126 8 1 14.3 15.4 8710 1 1271.2 14.6 15.2 14.3

CT2 031122 12 1224 123 8 1 14.9 8710 1 1226.5 14.4 16.4 14.9 CT2 031122 13 1225 123 8 1 14.4 8710 1 1222.2 14.4 15.8 14.4 CT2 031122 14 1226 123 8 1 15.1 8710 1 1227.9 14.3 16.9 15.1 CT2 031122 15 1227 126 8 1 15.0 14.9 8710 1 1251.2 14.4 16.5 15.0 CT2 031122 16 1228 131 9 1 13.7 14.6 8710 1 1295.1 14.4 15.1 13.7 CT2 031122 17 1229 136 9 1 13.1 14.2 8710 1 1333 14.5 14.2 13.1 CT2 031122 18 1230 137 9 1 110.8 38.2 8710 1 1321.4 14.5 120 110.8 CT2 031122 19 1231 133 9 1 14.2 38.0 8710 1 1312.3 14.5 15.4 14.2CT2 031122 20 1232 140 9 1 15.0 38.3 8710 1 1366.6 14.5 16.2 15.0 CT2 031122 21 1233 143 9 1 15.0 38.7 8710 1 1385.1 14.5 16.3 15.0

CT2 031123 17 1234 129 8 1 14.7 8710 1 1283.3 14.6 15.7 14.7 CT2 031123 18 1235 132 9 1 17.1 8710 1 1300.3 14.6 18.2 17.1 CT2 031123 19 1236 135 9 1 17.0 8710 1 1324 14.6 18.1 17.0 CT2 031123 20 1237 139 9 1 14.5 15.8 8710 1 1350.6 14.6 15.5 14.5

CT2 031205 8 1258 130 9 1 15.3 8710 1 1296.4 14.5 16.6 15.3 CT2 031205 9 1259 126 8 1 23.6 8710 1 1270.8 14.6 25.2 23.6 CT2 031205 10 1260 119 8 1 19.2 8710 1 1219.7 14.6 20.5 19.2 CT2 031205 11 1261 115 8 1 15.0 18.3 8710 1 1187.4 14.7 15.8 15.0 CT2 031205 12 1262 114 8 1 14.1 18.0 8710 1 1180.2 14.7 14.8 14.1 CT2 031205 13 1263 115 8 1 14.6 15.7 8710 1 1173.2 14.7 15.3 14.6 CT2 031205 14 1264 115 8 1 14.6 14.6 8710 1 1167.5 14.7 15.3 14.6 CT2 031205 15 1265 115 8 1 14.1 14.3 8710 1 1165.5 14.6 15 14.1 CT2 031205 16 1266 117 8 1 14.1 14.3 8710 1 1178.7 14.6 15 14.1 CT2 031205 17 1267 116 8 1 14.0 14.2 8710 1 1173.7 14.6 14.9 14.0 CT2 031205 18 1268 120 8 1 13.5 13.9 8710 1 1204.6 14.6 14.4 13.5 CT2 031205 19 1269 121 8 1 14.0 13.9 8710 1 1216.1 14.5 15.2 14.0

CT2 040105 8 1275 149 10 1 24.7 8710 1 1454.5 14.4 27.2 24.7 CT2 040105 9 1276 148 10 1 19.7 8710 1 1447.6 14.5 21.3 19.7 CT2 040105 10 1277 148 10 1 15.0 8710 1 1448.1 14.5 16.3 15.0 CT2 040105 11 1278 148 10 1 15.0 18.6 8710 1 1447.1 14.5 16.2 15.0 CT2 040105 12 1279 148 10 1 15.0 16.2 8710 1 1446 14.5 16.2 15.0 CT2 040105 13 1280 148 10 1 15.2 15.04 8710 1 1444.8 14.6 16.2 15.2 CT2 040105 14 1281 147 10 1 16.0 15.3 8710 1 1441.6 14.6 17.1 16.0 CT2 040105 15 1282 147 10 1 14.9 15.3 8710 1 1436.6 14.6 15.9 14.9 CT2 040105 16 1283 147 10 1 14.7 15.2 8710 1 1440.2 14.6 15.7 14.7 CT2 040105 17 1284 149 10 1 15.4 15.3 8710 1 1455.1 14.6 16.4 15.4 CT2 040105 18 1285 149 10 1 17.4 15.6 8710 1 1457.2 14.5 18.8 17.4 CT2 040105 19 1286 138 9 1 25.3 18.2 8710 1 1366.6 14.5 27.4 25.3 CT2 040105 20 1287 147 10 1 15.1 18.3 8710 1 1436.5 14.6 16.1 15.1 CT2 040105 21 1288 118 8 1 30.4 22.0 8710 1 1220.1 15.2 29.4 30.4

CT2 040106 17 1289 143 9 1 110.8 8710 1 1416.8 14.5 120 110.8 CT2 040106 18 1290 144 9 1 15.0 8710 1 1418.8 14.5 16.3 15.0 CT2 040106 19 1291 145 9 1 14.9 8710 1 1427.8 14.5 16.1 14.9 CT2 040106 20 1292 146 9 1 14.9 38.9 8710 1 1430.4 14.5 16.1 14.9

CT2 041102 7 1351 120 8 1 41.6 8710 1 1219.5 14.9 42.3 41.6 CT2 041102 8 1352 146 9 1 15.5 8710 1 1404.5 14.4 17.1 15.5 CT2 041102 9 1353 148 9 1 14.6 8710 1 1426.2 14.4 16.1 14.6 CT2 041102 10 1354 147 9 1 14.9 21.7 8710 1 1419.8 14.3 16.6 14.9 CT2 041102 11 1355 146 9 1 14.9 14.98 8710 1 1409.8 14.3 16.6 14.9 CT2 041102 12 1356 145 9 1 14.6 14.7 8710 1 1404 14.3 16.3 14.6 CT2 041102 13 1357 121 8 1 14.9 14.8 8710 1 1214.3 14.4 16.4 14.9 CT2 041102 14 1358 120 8 1 14.6 14.8 8710 1 1208.6 14.4 16.1 14.6 CT2 041102 15 1359 120 8 1 14.2 14.6 8710 1 1207.3 14.4 15.6 14.2 CT2 041102 16 1360 120 8 1 14.2 14.5 8710 1 1207.6 14.4 15.6 14.2 CT2 041102 17 1361 125 8 1 14.5 14.4 8710 1 1244.6 14.4 16 14.5 CT2 041102 18 1362 127 8 1 14.5 14.4 8710 1 1264.5 14.4 16 14.5 CT2 041102 19 1363 133 8 1 14.8 14.5 8710 1 1308.8 14.4 16.3 14.8 CT2 041102 20 1364 139 9 1 14.8 14.7 8710 1 1357.4 14.3 16.5 14.8CT2 041130 9 1370 147 9 1 18.4 8710 1 1419.9 14.3 20.5 18.4 CT2 041130 10 1371 147 9 1 15.1 8710 1 1419.3 14.3 16.9 15.1 CT2 041130 11 1372 146 9 1 15.2 8710 1 1416.4 14.2 17.2 15.2 CT2 041130 12 1373 145 9 1 14.9 15.9 8710 1 1408.3 14.2 16.9 14.9 CT2 041130 13 1374 144 9 1 15.1 15.1 8710 1 1400.3 14.2 17.1 15.1 CT2 041130 14 1375 144 9 1 15.2 15.1 8710 1 1399 14.2 17.2 15.2 CT2 041130 15 1376 144 9 1 14.9 15.02 8710 1 1394.1 14.2 16.9 14.9 CT2 041130 16 1377 145 9 1 15.0 15.04 8710 1 1397.4 14.2 17 15.0 CT2 041130 17 1378 145 9 1 14.9 15.00 8710 1 1399.3 14.2 16.9 14.9 CT2 041130 18 1379 145 9 1 15.1 14.98 8710 1 1398.5 14.2 17.1 15.1 CT2 041130 19 1380 146 9 1 14.9 14.98 8710 1 1405.1 14.2 16.9 14.9 CT2 041130 20 1381 147 9 1 15.0 14.98 8710 1 1411.2 14.2 17 15.0 CT2 041130 21 1382 146 9 1 14.9 14.98 8710 1 1405 14.2 16.9 14.9

CT2 050117 16 1390 132 8 1 35.9 8710 1 1337.2 14.3 40.1 35.9 CT2 050117 17 1391 141 9 1 14.8 8710 1 1398.7 14 17.3 14.8 CT2 050117 18 1392 144 9 1 14.7 8710 1 1414.6 14 17.2 14.7 CT2 050117 19 1393 144 9 1 14.6 20.0 8710 1 1414.9 14 17 14.6 CT2 050117 20 1394 144 9 1 15.2 14.8 8710 1 1410.8 14.1 17.5 15.2

CT2 050429 9 1411 132 8 1 16.2 8710 1 1315 14.5 17.6 16.2 CT2 050429 10 1412 131 8 1 14.3 8710 1 1297.5 14.4 15.7 14.3 CT2 050429 11 1413 120 8 1 14.7 8710 1 1210.9 14.5 15.9 14.7 CT2 050429 12 1414 117 7 1 15.0 15.1 8710 1 1189.6 14.5 16.3 15.0 CT2 050429 13 1415 117 7 1 15.2 14.8 8710 1 1189.8 14.5 16.5 15.2 CT2 050429 14 1416 118 8 1 15.3 15.1 8710 1 1201.7 14.5 16.6 15.3

CT2 050926 9 1488 126 8 1 23.1 8710 1 1300.8 14.6 24.6 23.1 CT2 050926 10 1489 112 7 1 13.9 8710 1 1184.8 14.7 14.6 13.9 CT2 050926 11 1490 122 8 1 12.8 8710 1 1261.7 14.6 13.7 12.8 CT2 050926 16 1491 111 7 1 11.9 15.4 8710 1 1181.2 14.7 12.5 11.9

CT2 051208 16 1516 139 9 1 18.4 8710 1 1357.9 14.4 20.2 18.4 CT2 051208 17 1517 143 9 1 14.6 8710 1 1379.8 14.4 16.1 14.6 CT2 051208 18 1518 143 9 1 14.4 8710 1 1381.8 14.5 15.6 14.4 CT2 051208 19 1519 144 9 1 14.3 15.4 8710 1 1387 14.5 15.5 14.3"Lowell L. Smith" <lowellsmith1@cox.net> 05/10/2007 06:21 PM To Christian Fellner/RTP/USEPA/US@EPA

cc "Craig Harrison" <charrison@hunton.com> bcc Subject 4-Hr Exceedence Summary



### Christian: Attached is a Memo briefly describing the results of my preliminary analyses. I will get back to you shortly after May 22 with more information. I hope this is helpful to you in your analyses of the Turbine NSPS Reconsideration.

Lowell

### Page 1 

# LLS Consulting 24862 Luton, Laguna Hills, CA 92653 (949) 770-4349 

## TECHNICAL MEMORANDUM
May 10, 2007

TO: Christian Fellner CC: Craig Harrison – Hunton & Williams

FROM: Lowell L. Smith SUBJECT: Summary of 4-Hour CT NOx Exceedences for New Turbines As we discussed today on our conference call, I have some preliminary results for the 29 turbines used in my analyses. The 29 turbines were from the following utility plants 1. Adrian Units 1 through 8 2. Heard Units 1 through 3 3. Holden Units 1 through 3 4. Ladysmith Units 1 and 2 5. Lansing Smith Units 4 and 5 6. Manchief Units 1 and 2 7. Remington Units 1 through 4 8. Rockingham Units 1 through 5

The criteria that I used to select these units was as follows: 1. Turbines with CEMS data, 2. turbines with rated heat i nputs greater than 850 MMBtu/hr, 3. turbines commercialized after 1999, 4. turbines with permits requiring compliance with NO x 

### emission limits equal to or less than 15 ppm, and Most of these units are owned either by UARG members or by organizations who belong to UARG. The owner of the Manchief units is not a member of UARG. I was able to verify that each unit was permitted to emit less than 15 ppm through our UARG contacts and through an internet search wh ich provided the Colorado State Permit # 01OPMR236 for the Manchief units. The results for the 4-hour rolling average exceedences are shown in the attached summary. The 4-hour averages are for periods within a given calendar day. Previous analyses were for rolling averages irrespective of the calendar day, i.e., a continuous rolling average. I first filtered the data to exclude times when oil was burned and times

### Page 2 when the hourly heat input was less than of the turbines rated heat input. All turbines had a rated heat input greater than 850 MMBtu/H r. As we discussed, the exact method that will be used in the KKKK NSPS should be verified. If it is different than what I have used here, I will make a change in my analyses to rectify the error. This summary shows that potentially 10 of the 29 units (~35%) fail to meet the 4-hour standard. One issue that I have not gotten my arms around is what constitutes startup and shutdown. Looking at the loads in MW, one might conclude one thing while looking at the hourly heat input one might reach another conclusion. As you can see from the Summary, Holden 1 may have exceeded the limit due to startup for some of the periods shown in the Summary. Other periods for this unit clearly show exceedences of the standard.. Remington 1 and Rockingham 5 also show that startup and shutdown could potentially be the reason for their exceedences. With these two units, using the heat input to evaluate when startup and shutdown periods might be an issue, the conclusion I reach is that the Rockingham unit was cl early operating at a heat input (1818.7) representative of near full load operation while the MW load was far less than full load. Remington 1 is questionable whether or not it has an exceedence due to startup. I did not list the exceedences for the Manchief Un its because they were too numerous to list. A cursory look at the data the Manchief units indicates that some exceedences may be due to startup while others are clearly not due to startup.
Since I have eliminated some of the 29 turbi nes as not having exceedences, it would be simpler if you concentrated on those that I feel did have exceedences of the Input NSPS. For all of the analyses, I looked at EDR data starting from 2003 through the second quarter of 2006 (I didn’t have the subs equent data at the time). If a unit had a special circumstance such as a modification or its initial startup, I started the analyses well after the modification or startup was completed. As we discussed, I also did analyses on increas ing the averaging time from 4 to 24 on a continuous rolling average basis (not within a calendar day) as well as evaluating a Block 24 hour method, a method similar to the Subpart Da method, a modification of that method and a pseudo 24 hour method where block pseudo days were evaluated. The latter four methods are described in my memo dated May 7, 2007. My emphasis was on methods that used as much of t he data as possible but still took into consideration the fact that simple cycle tu rbines, for the most part, operate infrequently. At the present time, I am not prepared to share the results of these method analyses but will do so shortly after I get back from my vacation on May 22. If you feel that we have not included some turbines in our database that should be included please let me know and I will analyze those as well.

### Page 3 

## Summary of 4-Hour NOx Exceedences from EDR Data

Audrain Unit 1 055234

Date Hour Load Hourly HI NOc 15% 4-Hr Avg

060724 12 77 1003.2 5.4 060724 13 77 1003.2 5.3 060724 14 71 943.8 19.5 060724 15 64 871.2 18.8 12.3 060724 16 67 891.0 24.4 17.0 060724 17 69 904.2 5.8 17.1

Heard Unit 1 055141

Date Hour Load Hourly HI NOc 15% 4-Hr Avg

030118 5 163 1669.3 21.9 030118 6 165 1675.8 14.6 030118 7 175 1762.3 12.0 030118 8 174 1753.5 14.3 

### 15.7 030118 9 131 1398.6 12.9 

### 13.5

Holden Unit 1 007848

Date Hour Load Hourly HI NOc 15% 4-Hr Avg

030123 6 98 1154.3 

### 30.5 030123 7 22 706.4 

### 27.4 030123 10 7 612.2 

### 47.2 030123 11 104 1206.3 38.0 030123 12 114 1281.7 6.6 030123 17 108 1244.8 12.5 030123 18 118 1323.4 6.4 

### 15.9 030123 19 119 1327.8 6.3 

### 8.0 030123 20 118 1318.0 6.2 

### 7.9

### Page 4 Lansing Smith 4 000643

Date Hour Load Hourly HI NOc 15% 4-Hr Avg

030220 6 179 1776.4 10.2 030220 7 179 1773.1 31.7 030220 8 176 1753.5 10.9 030220 9 174 1740.6 10.1 

### 15.7 030220 10 170 1713.7 10.3 

### 15.8 030220 11 151 1566.5 10.0 

### 10.3

040311 5 130 1460.4 43.0 040311 6 177 1814.2 8.2 040311 7 158 1665.0 8.6 040311 8 126 1424.9 9.3 

### 17.3 040311 9 135 1484.0 8.8 

### 15.6 040311 11 151 1605.8 9.8 

### 8.9 040311 12 171 1754.6 9.4 

### 9.2 040311 13 156 1584.9 8.3 

### 9.1 040311 14 159 1647.5 8.1 

### 8.9 040311 15 153 1603.0 8.0 

### 8.5 040311 16 137 1481.3 7.8 

### 8.1 040311 18 147 1564.1 7.9 

### 8.0 040311 19 160 1662.1 8.1 

### 8.0 040311 20 168 1727.5 8.4 

### 8.1 040311 21 168 1738.7 8.5 

### 8.2 040311 22 155 1633.9 8.3 

### 8.3 Lansing Smith 5 000643

Date Hour Load Hourly HI NOc 15% 4-Hr Avg

050913 4 130 1440.7 9.0 050913 5 130 1439.0 9.1 050913 6 128 1428.9 9.1 050913 7 109 1298.1 9.0 050913 8 81 1098.8 9.0 050913 9 83 1124.8 9.1 050913 10 162 1710.2 8.6

### Page 5 050913 11 163 1715.9 8.2 050913 12 163 1709.7 11.3 050913 13 170 1749.3 24.4 

### 13.1 050913 14 178 1790.6 14.1 

### 14.5 050913 15 177 1786.6 14.0 

### 15.9 050913 16 178 1789.0 13.7 

### 16.5 050913 17 170 1740.3 12.0 

### 13.4 Remington Unit 1 007839

Date Hour Load Hourly HI NOc 15% 4-Hr Avg

040515 13 107 1188.8 44.8 040515 14 152 1531.0 8.2 040515 15 153 1535.7 8.3 040515 16 154 1542.8 8.2 

### 17.4 Rockingham Unit 5 055116

Date Hour Load Hourly HI NOc 15% 4-Hr Avg

050719 12 10 1818.9 

### 26.2 050719 13 157 1818.9 12.8 050719 14 165 1818.9 11.4 050719 15 163 1818.9 11.7 

### 15.5 050719 16 165 1818.9 11.2 

### 11.8 050719 17 160 1818.9 11.0 

### 11.3 050719 18 32 1818.9 28.9 

### 15.7

050726 8 22 1818.9 26.6 050726 9 163 1818.9 11.9 050726 10 166 1818.9 11.4 050726 11 166 1818.9 11.4 

### 15.3 050726 12 165 1818.9 11.3 

### 11.5 050726 13 165 1818.9 11.3 

### 11.3 050726 14 165 1818.9 11.2 

### 11.3 050726 15 165 1818.9 11.2 

### 11.2

### Page 6 050726 16 165 1818.9 11.0 

### 11.2 050726 17 165 1818.9 10.9 

### 11.1 050726 18 165 1818.9 10.8 

### 11.0 050726 19 165 1818.9 10.8 

### 10.9 050726 20 163 1818.9 11.1 

### 10.9 050726 21 37 1818.9 26.8 

### 14.9"Lowell L. Smith" <lowellsmith1@cox.net> 05/09/2007 01:09 PM To Christian Fellner/RTP/USEPA/US@EPA

cc bcc Subject FW: 4Hr Exceedence Units



### Also exclude Ladysmith 2.

From: Lowell L. Smith [mailto:lowellsmith1@cox.net] Sent: Wednesday, May 09, 2007 10:05 A M To: Christian Fellner (fellner.christian@epa.gov) Subject: 4Hr Exceedence Units


### Christian: The list I sent to you today should exclude Holden 3 and Heard 2. They do not have any exceedences of the 4-Hr standard.

Lowell"Lowell L. Smith" <lowellsmith1@cox.net> 05/09/2007 11:31 AM To Christian Fellner/RTP/USEPA/US@EPA

cc "Craig Harrison" <charrison@hunton.com> bcc Subject RE: Combustion Turbine Reconsideration Conference Call

Christian:

The attachment contains a list of 12 new turbines that I found to have 4-hour daily violations. Rockingham 5 Audrain 1 Remington 1 Lansing Smith 4 Lansing Smith 5 Ladysmith 2 Holden 1 Holden 3 Heard 1 Heard 2 Manchief 1 & 2 I did this preliminary analysis for EDR data starting from 2003 to the second quarter of 2006. All of these turbines have permits that require compliance with a NOx limit of 15 ppm or lower. The difference between these analyses and what was used before is that the previous analyses used a constant factor to correct from lb/MMBtu to ppm. The current analysis uses the raw unadjusted ppm corrected to 15 percent excess oxygen. This would make slight differences in the ppm levels used previously. The current preliminary analysis uses the appropriate corrected ppm levels. I hope this is helpful for our conference call tomorrow.

Lowell

-----Original Message----- From: Fellner.Christian@epamail.epa.gov [mailto:Fellner.Christian@epamail.epa.gov] Sent: Tuesday, May 08, 2007 12:12 PM To: Harrison, Craig Cc: Lowell Smith (E-mail); Wayland.Robertj@epamail.epa.gov; Vetter.Rick@epamail.epa.gov Subject: Combustion Turbine Reconsideration Conference Call

Craig, Do you have an agenda for Thursday's conference call on the stationary combustion turbine NSPS reconsideration? I am assuming you will want to discuss the issues raised in UARG's request for reconsideration. These would include:1. The numerical NOx emissions standard and the averaging period an d calculation methodology for units with NOx CEMS. 2. The use of acid rain CEMS calibration procedures. 3. Minor other issues including the ability to correct emissions data to 15% O2 and the rule language with respect to common steam headers. If I have missed anything please let me know. I have reviewed some NOx CEMS data and am getting different results from your analysis. This is the approach I have been using. I download the raw hourly data from the "prepackaged data sets" link from the CAMD we bsite, http://cfpub.epa.gov/gdm/index .cfm. I then use the "explode" program to get the text files and then import the data into excel. I use the unadjusted NOx emissions rate and match each hour to the hourly average fuel use, average load for the hour, and operating time for the hour. For each hour I determine the emissions standard that would apply. For average loads less than 75% and partial operating hours the standard is 96 ppm, and for hours burning over 50% oil (by heat input) the standard is 42 ppm. The remaining hours (greater than 75% load, complete hour of operation, greater than 50% natural gas) would be assigned a NOx emissions limit of 15 ppm. This approach should be conservative since the highest emissions standard for any given hour applies. For example, if a source burned over 50% oil for the first 15 minutes of a clock hour, but then burns natural gas for the remainder of the hour the applicable ppm standard would still be 42 ppm. Similarly, if a source operates for any 15 minute period at less than 75% load the 96 ppm standard applies (it is not necessary that the average hour load be less than 75%). That is why partial operating hours automatically have an applicable standard of 96 ppm. I reviewed 2005 and 2006 NOx emissions data for Lagoon Creek 11, Rockingham 5, Trimble County 9, and Madison 2 and none of them had any input based excess emissions on a 4-hour rolling average. I reviewed both a continuous 4-hour rolling average and a separate 4-hour rolling average just using the 15 ppm hours. I also reviewed Lansing Smith 5 and it had 3 excess emissions, but operated 11,344 hours over 2005 and 2006. I plan on reviewing data from a few additional turbines prior to Thursday's call. If there are any particular turbines you would like to discuss on Thursday please let me know and I will take at a look at the appropriate emissions data. Thank you.

----------------------------------------------------------------------- Christian Fellner Energy Strategies Group Sector Policies and Programs Division Office of Air Quality and Planning Standards United States Environmental Protection Agency 919.541.4003 (phone) 919.541.5450 (fax)"Lowell L. Smith" <lowellsmith1@cox.net> 10/05/2006 01:09 PM To Christian Fellner/RTP/USEPA/US@EPA

cc Craig Harrison <charrison@hunton.com>, Freeman Lauren <lfreeman@hunton.com> bcc Subject Large Turbine NSPS Info

Christian: You mentioned on our conference call that you had considered a daily averaging time for large turbines. In that conversation, I indicated that my intuition was that that would help the situation. Lauren Freeman indicated that if a turbine operated only for an hour or so, the daily averaging probably would not help, in fact, it might hurt the situation.

I took a look at several of the cases where the units did not meet the standard and found that Lauren was correct. The daily averaging period could be worse than the present requirement of a 4-hour average. Apparently, my intuition in regard to this matter is not very good. Please let me know if you want to discuss other alternatives. I have looked at several during my analysis. Regards

Lowell