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Home My WebLink AboutAQ_F_0400050_20120423_ST_STO-Rpt NORTH CAROLINA DIVISION OF Fayetteville Regional Office AIR QUALITY NCEMC-Anson Plant NC Facility ID 0400050 Stack Test Observation Report County/FIPS: Anson/007 Date: 04/23/2012 Facility Data Compliance Data NCEMC -Anson Plant Observation Date 04/23/2012 749 Blewett Falls Rd Observer's Name Heather Hawkins Lilesville,NC 28091 Operating Status Operating Lat: 34d 58.0837m Long: 79d 55.3361m Action Code 23/STACK TEST OBSERVED SIC: 4911 /Electric Services NAICS: 221112/Fossil Fuel Electric Power Generation Contact Data Permit Data Facility Contact Authorized Contact Technical Contact Permit 09492/T06 Shawn Fowler Terrence Ryan June Small Issued 4/11/2012 Manager,Combustion VP,Asset Management Director of Expires 5/31/2015 Turbine Generation (919)875-3111 Environmental Affairs Classification Title V (704)848-4002 (919)875-3116 Permit Status Active Inspector's Signature:�I IQ Comments: Date of Signature: DIRECTIONS TO SITE: From FRO take 401 S.to Wagram. Turn right on Old Wire Road(NC 144)just south of Wagram. Stay on NC 144, (this road will cross over 151501) until you reach HWY 74. Turn right on HWY 74. Just after crossing the Pee Dee River, turn right onto Power Plant Road. Travel approx 2 miles and turn left onto Blewett Falls Road. Travel approx 3 miles and the facility will be on the right. SAFETY CONSIDERATIONS: Required safety equipment includes,safety shoes,eye protection and hardhat. Open no doors and touch no plumbing while the turbine is in operation. FACILITY DESCRIPTION: This facility has simple-cycle, natural gas-fired (low sulfur No. 2 fuel oil backup) combustion turbines generating electricity in Anson County. The facility can produce 340 MW of electrical power to retail distribution during periods of high demand or during emergencies.This facility uses six Pratt and Whitney FT-8 Swift-Pac simple cycle gas turbine generator sets. Each of the six units consists of twQ turbines,each equipped with water injection and an oxidation catalyst system, and one generator. The two turbines associated with each FT-8 do not have to operate simultaneously. The double-ended configuration allows for greater efficiency during partial load usage. This plant operates as a"peaking" facility to meet peak power demands on a daily or seasonal basis. Pollution controls are demineralizer water injection to control NOx, and a high temperature oxidation catalyst to control CO. "Simple cycle gas turbine" means any stationary gas turbine,which does not recover heat from the gas turbine exhaust to either preheat the inlet combustion air or to heat water or generate steam. The Plant Information (PI) System was installed at this facility for plant-wide monitoring and analysis. The system handles the collection,storage,and retrieval of parametric data. It also acts as a data server for Microsoft Windows-based client applications that operators, engineers, managers, and other plant personnel use to view the plant data stored in the PI Data At-chive. The facility chooses to use a predictive emission monitor systems (PEMs) to monitor NOx emissions in lieu of CEMs. The predictive emission monitor systems have been proven to be as accurate as the OEMs and are in fact more economical from the cost and maintenance.The facility uses this software program to monitor and determine NOx emissions from the gas turbines in real time. Continuous NOx emission rate is determined based on vendor's data and turbine operating parameters. PERMITTED EMISSION SOURCES: Emission Emissions Source Description Control Device Control Device Source ID No. ID No. Description ES-lA One Pratt&Whitney FT8 Swift-Pac simple-cycle gas turbine(300 CD-1 Water injection system NSPS million Btu per hour nominal heat input capacity when firing natural gas, and 281 million Btu per hour nominal heat input capacity when CD-1A Oxidation catalyst firing No.2 fuel oil)and one generator per set of turbines system ES-1B One Pratt&Whitney FT8 Swift-Pac simple-cycle gas turbine(300 CD-1 Water injection system NSPS million Btu per hour nominal heat input capacity when firing natural gas,and 281 million Btu per hour nominal heat input capacity when CD-1B Oxidation catalyst firing No.2 fuel oil)and one generator per set of turbines system ES-2A One Pratt&Whitney FT8 Swift-Pac simple-cycle gas turbine(300 CD-1 Water injection system NSPS million Btu per hour nominal heat input capacity when firing natural gas,and 281 million Btu per hour nominal heat input capacity when CD-2A Oxidation catalyst firing No.2 fuel oil)and one generator per set of turbines system ES-2B One Pratt&Whitney FT8 Swift-Pac simple-cycle gas turbine(300 CD-1 Water injection NSPS million Btu per hour nominal heat input capacity when firing natural gas,and 281 million Btu per hour nominal heat input capacity when CD-2B Oxidation catalyst firing No.2 fuel oil)and one generator per set of turbines system ES-3A One Pratt&Whitney FT8 Swift-Pac simple-cycle gas turbine(300 CD-1 Water injection system NSPS million Btu per hour nominal heat input capacity when firing natural gas,and 281 million Btu per hour nominal heat input capacity when CD-3A Oxidation catalyst firing No.2 fuel oil)and one generator per set of turbines system ES-3B One Pratt&Whitney FT8 Swift-Pac simple-cycle gas turbine(300 CD-1 Water injection system NSPS million Btu per hour nominal heat input capacity when firing natural gas,and 281 million Btu per hour nominal heat input capacity when CD-3B Oxidation catalyst firing No. 2 fuel oil)and one generator per set of turbines system ES-4A One Pratt& Whitney FT8 Swift-Pac simple-cycle gas turbine(300 CD-I Water injection system NSPS million Btu per hour nominal heat input capacity when firing natural gas,and 281 million Btu per hour nominal heat input capacity when CD-4A Oxidation catalyst firing No.2 fuel oil)and one generator per set of turbines system ES-4B One Pratt&Whitney FT8 Swift-Pac simple-cycle gas turbine(300 CD-1 Water injection system NSPS million Btu per hour nominal heat input capacity when firing natural gas,and 281 million Btu per hour nominal heat input capacity when CD-413 Oxidation catalyst firing No.2 fuel oil)and one generator per set of turbines system ES-5A One Pratt& Whitney FT8 Swift-Pao simple-cycle gas turbine(300 CD-1 Water injection system NSPS million Btu per hour nominal heat input capacity when firing natural gas,and 281 million Btu per hour nominal heat input capacity when CD-5A Oxidation catalyst firing No.2 fuel oiD and one generator per set of turbines system ES-5B One Pratt&Whitney FT8 Swift-Pac simple-cycle gas turbine(300 CD-1 Water injection system NSPS million Btu per hour nominal heat input capacity when firing natural gas,and 281 million Btu per hour nominal heat input capacity when CD-5B Oxidation catalyst firing No.2 fuel oil and one generator per set of turbines system ES-6A One Pratt& Whitney FT8 Swift-Pac simple-cycle gas turbine(300 CD-1 Water injection system NSPS million Btu er hour nominal heat in ut ca aci when firm natural gas,and 281 million Btu per hour nominal heat input capacity when CD-6A Oxidation catalyst firing No.2 fuel oil)and one generator per set of turbines system ES-613 One Pratt&Whitney FT8 Swift-Pac simple-cycle gas turbine(300 CD-1 Water injection system NSPS million Btu per hour nominal heat input capacity when firing natural gas,and 281 million Btu per hour nominal heat input capacity when CD-613 Oxidation catalyst firing No.2 fuel oil)and one generator per set of turbines system PURPOSE OF SOURCE TEST AND OBSERVATION SUMMARY: The purpose of this source test is to recertify,per the Acid Rain Program(40 CFR 75)the NOx predictive emissions monitoring curves(PEM curves)associated with each turbine and which were established 5 years earlier when the facility was first began operating. The facility is required to test each turbine on both natural gas and#2 fuel oil at the following loads: 50,67,83, 100 percent of full load. The following rules and regulations are applicable: • 40 CFR 75 Continuous Emission Monitoring Appendix E Optional NOx Emission Estimation Protocol for Gas-Fired Peaking Units and Oil-Fired Peaking Units • 40 CFR 60 Subpart KKKK Standards of Performance for Stationary Combustion Turbines • 15A NCAC 2D.1418 New Electric Generating Units,Large Boilers,and Large I/C Engines • 15A NCAC 2Q.0317 PSD Avoidance During testing on 12 April 2012,the facility's DABS(Data Acquisition and Handling System)recorded that Unit 3 was in Start Up/Shut Down(SU/SD)mode for 3.42 hours,indicating that they had deviated permit condition 2Q .0317 in their current air permit. Based on the information initially provided,I was unable to determine whether a deviation had occurred. On 23 April 2012,I,Heather Hawkins,arrived at the facility to observe testing on units 2A and 2B on#2 fuel oil at 50%load(29 MW). I met with Mr. Shawn Fowler, Site Manager. We discussed the testing scenarios,projected completion date,testing schedule for the Hamlet plant,and the SU/SD issue that occurred on the 12th. According to Mr.Fowler,each morning of testing the unit is brought on line on gas(regardless of which fuel they will be testing on)and allowed to stabilize. Then,if they are testing on oil they switch fuels,and a Base Load calculation is performed in order to determine the MW output set point for the testing scenarios for that day. Base load is completely dependent on two factors:humidity and inlet ambient air temperature. As those variables change ' from moment to moment,so does the base load. In order to perform the testing they establish the base load each morning and use that as a"benchmark"to set their testing loads for the day. After further discussion with Mr. Fowler,I learned that the DAHS uses a built in set point,28 MW,as an internal indicator of when they are operating in SU/SD mode. Since normal operation for the facility is at base load,they only use the set point to trigger a record of SU/SD for tracking purposes,per the permit stipulation. The morning of 12 April 2012,the base load while operating on fuel oil was calculated at 54 MW,and since they were conducting the 50%load test they set the output to 27 MW. The unit ran at 27 MW for 3.42 hours,which was at 50%base load,not below 50%base load;however,b/c the set point in the DAHS is 28 MW,the system recorded all that time as SU/SD mode. Mr.Fowler gave me a copy of the Operator Log for the 120',which verifies that 27 MW was 50%of the determined base load that morning. The semi-annual report submitted in July will show the MW output on the IYi and can be use to verify that the output did not fall below 27 MW. Mr.Fowler stated that for the remainder of the testing they will use 29 MW as a set point for the 50%load scenario because the test methods allow+/- 10%in MW output and the DAHS set point won't be triggered to record SU/SD. CONCLUSIONS On 23 April 2012, it appeared that the NOx recertification source test being conducted at the NCEMC-Anson Plant was being done in accordance with the approved protocol,air quality regulations and test methods. A recertification application is due 45 days from the completion of testing and 120 days are allotted for review of the application by the regulatory agency(DAQ). /hsh Anson Site Daily Log Date: 411212012 Operators: Tom Hannigan DI2 STANDBY No 2nd Shift LF1 STANDBY LF2 SUCTION "M R M, 'M gg e4mg 61 102 Unit 1 NO 0456 Tech on site.No HMI alarms or Operations Issues.DF tank 2 on suction at 72.2 Vareo reading Is 29'13(4'&sulfur content Is 7.1 ppm 0645 Called ACES(Kenney)to advise of the dally emissions test protocol on Unit 3.No additional Anson generation expected. Unit 2 NO 0700 Locally Initiated Start on Unit 3 for emissions testing(Gas). Good start sequence -- --and water In both engines. -- 0729 Selected liquid fuel on Unit 3.Good transfer. 0900 Installed fitter assemblies In all Anson unit fogger skids. Unit 3 0705 1414 NO 0946 Selected Program Mode and 45 MWs(83%of liquid base load)on Unit 3. 1100 Set Unit 3 to 27 MWs(60i/*of lfq4ld base load) 1230 Hung Clearance 0436 on Unit 4 for Pi testing. 1330 Lifted Clearance#436 from Unit 4,and hung Clearance#435 on Unit 2 for PI testing. Unit 4 NO 1409 Locally Initiated Shutdown on Unit 3. 1415 Lifted Clearance#435 from Unit 2. 1445 DIF tank 2 at 67.60/6 and Varec;reading 27'2 5/16".Approximately 21,000 gallons of • fuel burned. Unit 6 NO 1615 All units In ROS and PEMS enabled.TH off site.KB to secure site at 1700. 1646 STACS personnel off site. Unit 0 NO Record all hours of operation on fuel off and sulfur content Babcock E Wilcox POaer Generation GroeD Bet=BW Version 46.0 Average Values Report Generated: 4/20/2012 12:10 Company: North Carolina EMC Period Start: l/1/2012 00:00 Plant: Period End: 4/19/2012 23:59 City/St: Validation Type: 1/1 in ma<.mom..mmv.mare,-c...1 Averaging Period: 1440 min Type: Block Avg Eemavmt Na- Naaimim MID -m Na -m Yew Bad !LL^_ Lammm Hamm DIASBSDEY GSBSOSDSs IIZASOSDEk U283DSDHr U3AbVSDEr II3HSOSDHr M4 SDBr 04B3GSwx U64SOSDHr DSBsusnec D6HBOSDEr D6BSOSOBr Period Start: Eks Bra " Bra Bra Bra Bra Era Bra Era Ere 8rs Bra 01/01/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 01/02/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 01/03/2012 00:00 0.42 0.30 0.45 0.30 0.45 0.47 0.52 0.40 0.62 0.47 0.28 0.25 01/04/2012 00:00 0.48 0.42 0.48 0.43 0.48 0.42 0.68 0.58 0.32 0.23 0.32 0.23 01/05/2012 00:00 0.27 0.23 0.32 0.27 0.33 0.23 0.32 0.25 0.30 0.23 0.30 0.23 01/06/2012 00:00 N/A N/A 0.32 0.27 0.33 0.22 0.30 0.25 0.28 0.25 N/A N/A 01/07/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 01/08/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 01/09/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 01/10/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 01/11/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 01/12/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 01/13/2012 00:00 N/A N/A '., 0.65 0.47 0.33 0.23 N/A N/A N/A N/A N/A N/A 01/14/2012 00:00 N/A N/A '.. 0.60 0.50 0.33 0.23 0.30 0.25 0.30 0.27 0.30 0.23 01/15/2012 00:00 N/A N/A 0.30 0.25 0.30 0.23 0.30 0.25 0.30 0.23 0.32 0.23 01/16/2012 00:00 0.27 0.25 0.32 0.23 0.32 0.40 0.30 0.23 0.30 0.23 0.30 0.25 01/17/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 01/16/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 01/19/2012 00:00 N/A N/A 0.32 0.25 0.28 0.23 0.32 0.25 0.28 0.25 0.30 0.23 01/20/2012 00:00 N/A N/A 0.30 0.25 0.32 0.23 N/A N/A N/A N/A N/A N/A 01/21/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 01/22/2012 00:00 0.27 0.23 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 01/23/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 01/24/2012 00:00 0.25 0.13 N/A N/A N/A N/A 0.18 0.15 0.17 0.13 0.18 0.13 01/25/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 01/26/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 01/27/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 01/28/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 01/29/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 01/30/2012 00:00 N/A N/A 0.30 0.25 0.32 0.23 0.32 0.27 N/A N/A 0.32 0.23 01/31/2012 00:00 N/A N/A 0.30 0.25 0.30 0.23 0.30 0.23 N/A N/A N/A N/A 02/01/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 02/02/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 02/03/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 02/04/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 02/05/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 02/06/2012 00:00 N/A N/A 0.32 0.23 0.32 0.22 N/A N/A N/A N/A N/A N/A 02/07/2012 00:00 N/A N/A '�, 0.32 0 25 N/A N/A N/A N/A N/A N/A N/A N/A 02/08/2012 00:00 N/A N/A 0.30 0.25 0.30 0.25 0.30 0.25 0.32 0.23 0.32 0.23 02/09/2012 00:00 N/A N/A 0.32 0.23 0.32 0.23 0.30 0.25 0.32 0.25 0.30 0.25 02/10/2012 00:00 N/A N/A 0.23 0.25 0.33 0.22 0.32 0.27 0.30 0 25 0.32 0.22 02/11/2012 00:00 N/A N/A 0.13 0.05 0.13 0.05 0.12 0.07 0.30 0.25 N/A N/A 02/12/2012 00:00 N/A N/A 0.30 0.25 0.33 0.23 0.82 0.68 0.60 0.48 0.32 0.25 02/13/2012 00:00 N/A N/A ''. 0.60 0.48 0.47 0.35 0.30 0.25 0.30 0.27 0.30 0.23 02/14/2012 00:00 N/A N/A 0.48 0.42 0.32 0.22 0.32 0.27 0.32 0.25 0.32 0.25 02/15/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 02/16/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 02/17/2012 00:00 N/A N/A 1 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 02/18/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 02/19/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 02/20/2012 00:00 N/A N/A 0.32 0.23 0.25 0.30 0.32 0.25 N/A N/A N/A N/A 02/21/2012 00:00 N/A N/A 0.32 0.25 `. 0.30 0.23 0.32 0.25 0.32 0.27 0.30 0.25 02/22/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Page 1 of 3 ' Babcock E Nileos Poser Gemxat Groff NetDAe.40 version 46-Q Bad-- Baximaa Na aaa Idy^_ lmsimm tlaua® Bain Baumm Maw tleai>oam INL^_ tea» DIASOSDHx B]]150508r 87A3NSDHx U285050ffi 113ASOSDffi 83BSUSDSr 84aS08!>er Lf4830308x BSHS95Jter IISBSOSDffi *Ma m* U6Eu"OSDffi . Period.Start: Era Bra Bra Bra ]er8 ffia ]e28 Itre ffi8 8i8 Bra Brs 02/23/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 02/24/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 02/25/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 02/26/2012 00:00 N/A N/A 0.33 0.23 0.32 0.22 0.30 0.23 N/A N/A N/A N/A 02/27/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 02/28/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 02/29/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 03/01/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 03/02/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 03/03/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 03/04/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 03/05/2012 00:00 N/A N/A 0.30 0.25 N/A N/A N/A N/A N/A N/A N/A N/A 03/06/2012 00:00 N/A N/A 0.60 0.50 0.32 0.25 0.30 0.25 0.30 0.25 0.32 0.22 03/07/2012 00:00 N/A N/A 0.27 0.32 0.33 0.22 0.32 0.23 0.30 0.25 0.30 0.23 03/08/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 03/09/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 03/10/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 03/11/2012 00:00 N/A N/A 0.30 0.23 N/A N/A N/A N/A N/A N/A N/A N/A 03/12/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 03/13/2012 00:00 N/A N/A 0.33 0.25 0.33 0.25 0.32 0.28 0.33 0.28 0.33 0.27 03/14/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 03/15/2012 00:00 N/A N/A 0.17 0.17 N/A N/A N/A N/A N/A N/A N/A N/A 03/16/2012 00:00 N/A N/A N/A N/A 0.17 0.17 0.18 0.18 0.18 0.18 N/A N/A 03/17/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.17 0.18 03/18/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 03/19/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 03/20/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 03/21/2012 00:00 N/A N/A 0.30 0.27 N/A N/A N/A N/A N/A N/A N/A N/A 03/22/2012 00:00 N/A N/A N/A N/A 0.32 0.25 N/A N/A N/A N/A N/A N/A 03/23/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 03/24/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 03/25/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 03/26/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 03/27/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 03/28/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 03/29/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 03/30/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 03/31/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 04/01/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 04/02/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.32 0.27 04/03/2012 00:00 0.25 0.40 N/A N/A N/A N/A N/A N/A N/A N/A 0.35 0.28 04/04/2012 00:00 0.18 0.17 '. N/A N/A N/A N/A N/A N/A N/A N/A 0.30 0.27 04/05/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.32 0.27 04/06/2012 00:00 N/A N/A j N/A N/A N/A N/A N/A N/A 0.32 0.27 N/A N/A 04/07/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A 0.32 0.27 N/A N/A 04/08/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A 0.33 0.27 N/A N/A 04/09/2012 00:00 N/A N/A N/A N/A 0.32 0.27 N/A N/A 0.30 0.27 N/A N/A 04/10/2012 00:00 N/A N/A N/A N/A 0.35 0.25 N/A N/A N/A N/A N/A N/A 04/11/2012 00:00 N/A N/A N/A N/A 0.33 0.23 N/A N/A N/A N/A N/A N/A L04/'12/2�6125001-00= N/A N/A N/A N/A C3:42:> 0.23 N/A N/A N/A N/A N/A N/A 04/13/2012 00:00 N/A N/A N/A N/A N/A N/A 0.25 0.23 N/A N/A N/A N/A 04/14/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 04/15/2012 00:00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 04/16/2012 00:00 N/A N/A N/A N/A N/A N/A 0.97 1.02 N/A N/A N/A N/A 04/17/2012 00:00 N/A N/A N/A N/A N/A N/A 0.32 0.28 N/A N/A N/A N/A 04/18/2012 00:00 N/A N/A ", N/A N/A N/A N/A 0.30 0.35 N/A N/A N/A N/A 04/19/2012 00:00 N/A N/A 0.30 0.25 N/A N/A 0.38 0.42 N/A N/A N/A N/A Piaal Average* 0.30 0.27 0.35 0.28 0.42 0.25 0.35 0.30 0.32 0.26 0.30 0.24 mm..Mmm 0.48 0.42 0.65 0.50 3.42 0.47 0.97 1.02 0.62 0.48 0.35 0.28 01/04/2012 01/04/2012 01/13/2012 03/06/2012 04/12/2012 01/03/2012 04/16/2012 04/16/2012 01/03/2012 02/12/2012 04/03/2012 04/03/2012 0:00 0:00 0:00 0:00 0:00 0:00 0:00 0:00 0:00 0:00 0:00 0:00 minimm'^ 0.18 0.13 0.13 0.05 0.13 0.05 0.12 0.07 0.17 0.13 0.17 0.13 Page 2 of 3 Babcock 4 Wileoa Power Generation GrocP NetnWM Version 46_0 Ka. Narinvw mft i Basimsa. Wan— Mr = M B1ABnHDffi OIBSOSner 93ASOSDBY H2HSGSO@' H9ASGSDHi H3BSGSnBr n41SOS nanartener BBASUSn US5.40SDHr B6ASGSDEr 96HSBSDHr Period Start: Bra Bra I Bra Bra ere Ere Bre Bra Era Ere ere Bra 04/04/2012 01/24/2012 02/11/2012 02/11/2012 02/11/2012 02/11/2012 02/11/2012 02/11/2012 01/24/2012 01/24/2012 03/17/2012 01/24/2012 0:00 0:00 0:00 0:00 0:00 0:00 0:00 0:00 0:00 0:00 0:00 0:00 ' �Does not include Invalid Averaging Periods ("N/I ") Page 3 of 3