Response to NDDH letter of January 11, 2010 to John Graves of Minnkota Power Response to Question 7; Page 1 of 5Date Time ConfidentialType From To Summary Description Attachments1/6/09 1:31 PM e-mail R. Blakley, BMcD R. Johnson, Fuel-TechV. Rummenhohl, Fuel-TechRequest for TESCR consulting None1/7/09 8:50 AM e-mail R. Johnson, Fuel-Tech R. Blakley, BMcDV. Rummenhohl, Fuel-TechAgree to assist BMcD None1/12/09 12:03 PM e-mail R. Johnson, Fuel-Tech R. Blakley, BMcDV. Rummenhohl, Fuel-TechInfo needed for TESCR massbalanceNone1/13/09 11:17 AM e-mail R. Blakley, BMcD R. Johnson, Fuel-TechV. Rummenhohl, Fuel-TechFRP temperature considerations forTESCRNone1/15/09 9:47 AM e-mail R. Blakley, BMcD R. Johnson, Fuel-TechV. Rummenhohl, Fuel-TechRequest for review of catalystmangement plan for TESCRBMcD catalyst management plan forTESCR (draft)1/23/09 8:10 AM e-mail R. Johnson, Fuel-Tech R. Blakley, BMcD Mass balance & PFD for TESCR PFD for TESCRMass balance for TESCR1/23/09 9:58 AM e-mail R. Blakley, BMcD R. Johnson, Fuel-TechV. Rummenhohl, Fuel-TechDesign issues for TESCR;Additional documents neededNone2/7/09 5:25 PM e-mail R. Johnson, Fuel-Tech R. Blakley, BMcD PFDs for TESCRMass balances for TESCRPFDs for TESCRMass balances for TESCR2/9/09 5:30 PM e-mail R. Blakley, BMcD R. Johnson, Fuel-Tech Questions RE: TESCR None3/3/09 12:26 PM e-mail R. Blakley, BMcD R. Johnson, Fuel-Tech Heat source for reheat; Decision onSCR reagentNone3/6/09 11:59 AM e-mail R. Johnson, Fuel-Tech R. Blakley, BMcD Effect of urea conversion on massbalances; Request for confirmationof SCR mass balances neededNone3/6/09 12:10 PM e-mail R. Blakley, BMcD R. Johnson, Fuel-Tech Natural gas for urea conversion None3/6/09 12:25 PM e-mail R. Blakley, BMcD R. Johnson, Fuel-Tech Confirm need for LDSCR & TESCRmass bal for U1 & U2None3/12/09 8:59 AM e-mail R. Johnson, Fuel-Tech R. Blakley, BMcD Mass balances, PFDs & reactorsizes for TESCR & LDSCR forMRYS U1 & U2Mass balances, PFDs & reactor sizes forTESCR & LDSCR for MRYS U1 & U23/19/09 9:06 AM e-mail C. Bowman, BMcD M. Gialanella, BPI Request for SCR quotes Fuel analyses; Flue gas conditionsQuestion 7- All vendor correspondence related to SCR reactor sizing, catalyst volume, NOx control efficiency, catalyst cost, catalyst replacement schedule andcatalyst guarantees should be provided. This includes the original requests submitted to vendors and (catalyst) suppliers by Minnkota and its consultants. Thismust also include the description of thegas stream that was supplied to the vendors.Response:The tabulation below provides an index to all correspondence related to these topics. Where an item is considered by Minnkota to beCONFIDENTIAL, the indication as such is given in the third column. The confidential and non-confidential correspondence will be submitted to NDDH inelectronic form on separate CDs. Minnkota requests certification of the claimed confidential materials as confidential in accordance with the Air Pollution ControlRules for the State of North Dakota at 33-15-01-16. Confidentiality of records.Response to NDDH letter of January 11, 2010 to John Graves of Minnkota Power Response to Question 7; Page 2 of 5Date Time ConfidentialType From To Summary Description AttachmentsQuestion 7- All vendor correspondence related to SCR reactor sizing, catalyst volume, NOx control efficiency, catalyst cost, catalyst replacement schedule andcatalyst guarantees should be provided. This includes the original requests submitted to vendors and (catalyst) suppliers by Minnkota and its consultants. Thismust also include the description of thegas stream that was supplied to the vendors.Response:The tabulation below provides an index to all correspondence related to these topics. Where an item is considered by Minnkota to beCONFIDENTIAL, the indication as such is given in the third column. The confidential and non-confidential correspondence will be submitted to NDDH inelectronic form on separate CDs. Minnkota requests certification of the claimed confidential materials as confidential in accordance with the Air Pollution ControlRules for the State of North Dakota at 33-15-01-16. Confidentiality of records.3/20/09 2:55 PM e-mail C. Bowman, BMcD M. Gialanella, BPI Correction of SCR COD dates None3/30/09 3:43 PM e-mail C. Bowman, BMcD M. Gialanella, BPI GGH leakage rates allowed;Steam reheat not an optionNone4/1/09 2:26 PM e-mail J. Waller, BPI C. Bowman, BMcD Dates for quotation None4/2/09 11:15 AM e-mail J. Waller, BPI C. Bowman, BMcD Flue gas conditions Comparison Table4/7/09 10:03 AM e-mail C. Bowman, BMcD J. Waller, BPI Corrected flue gas conditions Flue gas conditions4/9/09 12:23 PM e-mail J. Waller, BPI C. Bowman, BMcDFGD GGH leakage rates allowedNone4/9/09 1:15 PM e-mail C. Bowman, BMcD J. Waller, et al, BPI GGH leakage rates allowed previous e-mail of 3/30/09; 3:43 PM4/20/09 7:14 AMYe-mail J. Waller, BPI C. Bowman, BMcD Preliminary info for quotation Flue Gas ConditionsFlow diagram (LDSCR)Flow diagram (TESCR)FGD GGH dimensions / loadsSCR GGH dimensionsSCR GGH loadsSCR Reactor Elev. ViewsSCR Reactor Plan View4/28/09 3:36 PM e-mail J. Waller, BPI C. Bowman, BMcDΔP, ammonia use, gas firing Tabulation of expected operating data6/1/09 2:47 PMYe-mail J. Waller, BPI C. Bowman, BMcD BPI's SCR proposal #502331 SCR Budgetary proposal (confidential)BPI/RPI SCR Reference List (public)8/3/09 8:24 AM e-mail W. Jones, Haldor-Topsoe R. Blakley, BMcD Agree to meet with Minnkota None8/3/09 5:18 PM e-mail R. Blakley, BMcD W. Jones, Haldor-Topsoe Purpose for meeting None8/5/09 1:11 PM e-mail R. Bryant, BMcD W. Jones, Haldor-Topsoe Agenda for meeting Agenda for meeting at Haldor-Topsoe8/5/09 8:38 PM e-mail N. White, Haldor-Topsoe R. Bryant, BMcD Agenda for meeting Agenda for meeting at Haldor-Topsoe8/7/09 2:56 PM e-mail R. Bryant, BMcD N. Rosha, CERAM PFDs & Mass balances Mass balances, PFDs & reactor sizes forTESCR & LDSCR for MRYS U1 & U2(from Fuel-Tech)8/7/09 3:05 PM e-mail R. Bryant, BMcD Meeting invitees Agenda for meeting Agenda for meeting at Haldor-Topsoe8/7/09 3:13 PM e-mail R. Bryant, BMcD Meeting invitees Agenda for meeting Agenda for meeting with CERAMResponse to NDDH letter of January 11, 2010 to John Graves of Minnkota Power Response to Question 7; Page 3 of 5Date Time ConfidentialType From To Summary Description AttachmentsQuestion 7- All vendor correspondence related to SCR reactor sizing, catalyst volume, NOx control efficiency, catalyst cost, catalyst replacement schedule andcatalyst guarantees should be provided. This includes the original requests submitted to vendors and (catalyst) suppliers by Minnkota and its consultants. Thismust also include the description of thegas stream that was supplied to the vendors.Response:The tabulation below provides an index to all correspondence related to these topics. Where an item is considered by Minnkota to beCONFIDENTIAL, the indication as such is given in the third column. The confidential and non-confidential correspondence will be submitted to NDDH inelectronic form on separate CDs. Minnkota requests certification of the claimed confidential materials as confidential in accordance with the Air Pollution ControlRules for the State of North Dakota at 33-15-01-16. Confidentiality of records.8/13/09 11:18 AM e-mail N. Rosha, CERAM R. Bryant, BMcD Presentation & Reference List CERAM presentation at BMcD 8/11CERAM LDSCR/TESCR Ref. List8/18/09 3:14 PM e-mail W. Jones, Haldor-Topsoe R. Bryant, BMcD Scope of Work HTI typical Scope of Work8/19/09 9:19 AM e-mail W. Jones, Haldor-Topsoe R. Bryant, BMcD Startup procedure for Amager 1 Presentation on start-up procedure forboiler, FGD& SCR at Amager Unit 18/25/09 5:17 PMYe-mail R. Blakley, BMcD R. Johnson, Fuel-TechV. Rummenhohl, Fuel-TechRequest for review of prelim designfor TESCR & LDSCRBPI's SCR proposal #502331Flue Gas ConditionsFlow diagram (LDSCR)Flow diagram (TESCR)FGD GGH dimensions / loadsSCR GGH dimensionsSCR GGH loadsSCR System PerformanceSCR Reactor Elev. ViewsSCR Reactor Plan View8/26/09 4:26 PM e-mail R. Bryant, BMcD W. Jones, Haldor-Topsoe Request for recommendations Scope of ServicesMicrobeam Report 1084Excerpt from 4/2007 Vendor Query8/26/09 4:30 PM e-mail R. Bryant, BMcD N. Rosha, CERAM Request for recommendations Scope of ServicesMicrobeam Report 1084Excerpt from 4/2007 Vendor Query9/1/09 6:57 AM e-mail R. Johnson, Fuel-Tech R. Blakley, BMcD Preliminary PFDs PFD for TESCR for MRY U1 & U2PFD for LDSCR for MRY U1 & U29/1/09 5:04 PMYe-mail R. Blakley, BMcD R. Johnson, Fuel-TechV. Rummenhohl, Fuel-TechDiscussion of design and operatingissues for TESCR & LDSCRMark-up of BPI/RPI proposal drawings9/2/09 11:18 AMYe-mail R. Blakley, BMcD J. Waller, BPI Questions on BPI design SCR Budgetary proposal (confidential)BPI/RPI SCR Reference List (public)9/3/09 3:00 PM e-mail R. Johnson, Fuel-Tech R. Blakley, BMcD Problem with attachments for e-mailof 9/1/09 5:04 PM;Hitachi No-Leak GGH brochureHitachi No-Leak GGH brochureArgillon SINOX list of toxic agentsResponse to NDDH letter of January 11, 2010 to John Graves of Minnkota Power Response to Question 7; Page 4 of 5Date Time ConfidentialType From To Summary Description AttachmentsQuestion 7- All vendor correspondence related to SCR reactor sizing, catalyst volume, NOx control efficiency, catalyst cost, catalyst replacement schedule andcatalyst guarantees should be provided. This includes the original requests submitted to vendors and (catalyst) suppliers by Minnkota and its consultants. Thismust also include the description of thegas stream that was supplied to the vendors.Response:The tabulation below provides an index to all correspondence related to these topics. Where an item is considered by Minnkota to beCONFIDENTIAL, the indication as such is given in the third column. The confidential and non-confidential correspondence will be submitted to NDDH inelectronic form on separate CDs. Minnkota requests certification of the claimed confidential materials as confidential in accordance with the Air Pollution ControlRules for the State of North Dakota at 33-15-01-16. Confidentiality of records.9/3/09 6:23 PMYe-mail R. Blakley, BMcD R. Johnson, Fuel-Tech Re-transmittal of preliminary designof ductwork, TESCR w/GGH,LDSCR w/GGHBMcD plan & elev dwgs of ductsMarkup of confidential BPI proposaldrawings (plan & elev) of SCR towers9/11/09 3:45 PM e-mail R. Johnson, Fuel-Tech R. Blakley, BMcD Updated PFD/mass balances PFD / mass balance for TESCR for MRYU1 & U2PFD / mass balance for LDSCR for MRYU1 & U29/15/09 7:36 AM e-mail R. Johnson, Fuel-Tech R. Blakley, BMcD Comments on prelim design forMRYS LDSCR and TESCRFuel-Tech Comments on BMcD prelimdesign for MRYS LDSCR and TESCR9/15/09 9:18 AM e-mail R. Blakley, BMcD R. Johnson, Fuel-Tech Questions on Fuel-Tech massbalance discrepanciesFuel-Tech PFD / mass balancesBMcD comparison of Fuel-Tech data9/15/09 9:53 AM e-mail R. Johnson, Fuel-Tech R. Blakley, BMcD Resolution of discrepancy None9/17/09 11:16 AM e-mail R. Blakley, BMcD R. Johnson, Fuel-Tech Request for information None9/18/09 1:32 PMYe-mail G. Holscher, CERAM L. Kvernen, Minnkota Proposal Submittal CERAM proposal (confidential)CERAM Reference lists (public)9/22/09 11:57 PM e-mail R. Johnson, Fuel-Tech R. Blakley, BMcD Revised PFDs for Unit 1 Revised Fuel-tech PFD/mass balancesfor MRY U1 LD/TE SCRsAdditional mass balance data9/23/09 4:51 PM e-mail R. Blakley, BMcD R. Johnson, Fuel-Tech Questions about Fuel-Tech massbalance resultsFuel-Tech PFD / mass balancesBMcD comparison of Fuel-Tech data9/25/09 6:59 AM e-mail R. Johnson, Fuel-Tech R. Blakley, BMcD Corrected PFD / mass balance Revised Fuel-tech PFD/mass balancesfor MRY U1 TESCRAdditional mass balance data9/25/09 1:31 PM e-mail S. Libby, Minnkota P. Dyer, BMcD B & W response to survey aboutcatalyst changeoutB & W response to survey about catalystchangeout9/25/09 3:31 PM e-mail R. Blakley, BMcD R. Johnson, Fuel-Tech Questions about Fuel-Tech massbalance resultsRevised Fuel-tech PFD/mass balancesfor MRY U1 & U2 LD/TE SCRsAdditional mass balance dataResponse to NDDH letter of January 11, 2010 to John Graves of Minnkota Power Response to Question 7; Page 5 of 5Date Time ConfidentialType From To Summary Description AttachmentsQuestion 7- All vendor correspondence related to SCR reactor sizing, catalyst volume, NOx control efficiency, catalyst cost, catalyst replacement schedule andcatalyst guarantees should be provided. This includes the original requests submitted to vendors and (catalyst) suppliers by Minnkota and its consultants. Thismust also include the description of thegas stream that was supplied to the vendors.Response:The tabulation below provides an index to all correspondence related to these topics. Where an item is considered by Minnkota to beCONFIDENTIAL, the indication as such is given in the third column. The confidential and non-confidential correspondence will be submitted to NDDH inelectronic form on separate CDs. Minnkota requests certification of the claimed confidential materials as confidential in accordance with the Air Pollution ControlRules for the State of North Dakota at 33-15-01-16. Confidentiality of records.9/28/09 10:05 AM e-mail R. Johnson, Fuel-Tech R. Blakley, BMcD Revised Fuel-Tech PFDs Revised Fuel-Tech LD/TE SCR PFDsand additional mass balance information9/28/09 1:03 PMYe-mail W. Jones, Haldor-Topsoe R. Bryant, BMcD HTI budgetary quote for catalyst forLDSCRs at MRYNone10/1/09 2:29 PMYe-mail R. Blakley, BMcD J. Waller, BPI Follow-up questions about BPI'sSCR proposal #502331BPI's SCR proposal #50233110/5/09 1:27 PM e-mail S. Benson, Microbeam W. Jones, Haldor-Topsoe Sulfation of fly ash Excerpt from paper by S. Benson10/9/09 9:33 AM e-mail W. Jones, Haldor-Topsoe R. Bryant, BMcD Update on Amager None10/12/09 12:55 PMYe-mail W. Jones, Haldor-Topsoe R. Bryant, BMcD HTI proposal for catalyst for LDSCRsat MRYHTI proposal for catalyst for LDSCRs atMRY U1 & U210/13/09 8:42 AMYe-mail N. Rosha, CERAM L. Kvernen, Minnkota CERAM proposal for catalyst forMRY LDSCR & TESCRCERAM proposal for catalyst for MRYLDSCR & TESCR10/23/09 3:35 PMYe-mail W. Jones, Haldor-Topsoe R. Blakley, BMcD Clarification of HTI proposal None12/22/09 9:21 AM e-mail R. Blakley, BMcD R. Johnson, Fuel-Tech Reheat data discepancy Revised Fuel-Tech PFD/mass balance1/6/10 2:45 PM e-mail R. Blakley, BMcD W. Jones, Haldor-Topsoe Request for written confirmation Letter dated 1/6/2010 from B. Blakley1/6/10 2:37 PM e-mail R. Blakley, BMcD N. Rosha, CERAM Request for written confirmation Letter dated 1/6/2010 from B. Blakley1/11/10 1:03 PM e-mail R. Blakley, BMcDV. Rummenhohl, Fuel-TechReheat data discepancy Revised Fuel-Tech PFD/mass balance1/13/10 3:02 PM e-mail N. Rosha, CERAM R. Blakley, BMcD Written confirmation Letter dated 1/6/2010 from B. Blakley1/13/10 5:29 PM e-mail W. Jones, Haldor-Topsoe R. Blakley, BMcD Written confirmation Letter dated 1/13/2010 from W. Jones1/15/10 9:14 AM e-mailV. Rummenhohl, Fuel-TechR. Blakley, BMcD Reheat data discepancy None1/22/10 1:46 PM e-mailV. Rummenhohl, Fuel-TechR. Blakley, BMcDC. Weilert, BMcDReheat data discepancy Corrected Fuel-Tech PFD / massbalance for MRY U1 LDSCR