1From:Coomes, Brandon <Brandon.Coomes@centuryaluminum.com>Sent:Tuesday, April 14, 2015 7:29 AMTo:Hakos, MatthewCc:'Putney, David'; Green, David A.; Coomes, JamieSubject:RE: FW: Bag Leak Detection System RequestAttachments:Alcan Sebree PM_CO Report 2010.pdfMatt,You are correct.Attached is the 2010 Test Report. I’ll send you the 2012 and 2014 test reports shortly.Thanks,**Brandon Coomes**Environmental Engineer, Sebree9404 State Route 2096Robards, KY 42452270.521.7454 (Century Aluminum Sebree, LLC)270.860.0057 (Mobile)brandon.coomes@centuryaluminum.comFrom:Hakos, Matthew [mailto:mhakos@rti.org]Sent:Monday, April 13, 2015 3:28 PMTo:Coomes, BrandonCc:'Putney, David'; Green, David A.; Coomes, JamieSubject:RE: FW: Bag Leak Detection System RequestBrandon,Based on the comments submitted by Century, it is my understanding that we should multiply each run by three, then take the average of the three runs. Thisactually results in the same answer, but is consistent with the approach we use to determine averages for the MACT floors. Can you please confirm this iscorrect?220100.0030.0030.0410.047Sum0.0090.0090.1230.047Average20120.0220.1810.0260.229Sum0.0660.5430.0780.229Average20130.0330.0080.0710.112Sum0.0990.0240.2130.112Average20140.0020.0020.0190.023Sum0.0060.0060.0570.023AverageThis results in the overall average shown below.**Mean Unit Of** **Measure 1** **2 3** **4 5** **6 7** **8 9** **10 11** **12 13** **14 0.1028** lb/tonanode0.0090.0090.123------0.0660.5430.0780.0990.0240.2130.0060.006Also, can you all provide the pdf’s of these test reports so that we can confirm the results? We greatlyappreciate your efforts.Thank you in advance,Matt**From:**Coomes, Brandon [mailto:Brandon.Coomes@centuryaluminum.com]**Sent:**Monday, April 13, 2015 2:53 PM**To:**Hakos, Matthew**Cc:**'Putney, David'; Green, David A.; Coomes, Jamie**Subject:**RE: FW: Bag Leak Detection System RequestMatt,We do have some PM test data for Sebree:**2010**Run #1 = 0.003 lb/ton Run #2 = 0.003 lb/ton Run #3= 0.041 lb/ton**Scrubber Total = 0.047 lb/ton green anode 2011** No data available3**2012**Run #1 = 0.022 lb/ton Run #2 = 0.181 lb/ton Run #3= 0.026 lb/ton**Scrubber Total = 0.229 lb/ton green anode 2013 Corrected ICR Data** Run #1 = 0.033 lb/ton Run #2 = 0.008 lb/ton Run #3= 0.071 lb/ton**Scrubber Total = 0.112 lb/ton green anode 2014** Run #1 = 0.002 lb/ton Run #2 = 0.002 lb/ton Run #3= 0.019 lb/ton**Scrubber Total = 0.023 lb/ton green anode******Please note the 2014 PM emissions results are atyp ical and well below the RY2010 - RY2014 average res** **ult of 0.10 lb/ton green anode.**The anode bake furnace scrubber exhausts to three separate stacks. PM emissions were summed from all three test runs in order to represent the total PMemission rate of the scrubber.Please let me know if you need anything else.**Brandon Coomes**Environmental Engineer, Sebree9404 State Route 2096Robards, KY 42452270.521.7454 (Century Aluminum Sebree, LLC)270.860.0057 (Mobile)brandon.coomes@centuryaluminum.comFrom:Hakos, Matthew [mailto:mhakos@rti.org]Sent:Friday, April 10, 2015 10:39 AMTo:Coomes, JamieCc:'Putney, David'; Coomes, Brandon; Green, David A.Subject:RE: FW: Bag Leak Detection System RequestJamie and Brandon,Thank you for your help thus far. I have one morerequest for data regarding PM data for the anode bake furnaces at Sebree. Do you all have any PM testdatathat you could provide to us. We were thinking thatPM test data may be available through the annual TF testing that is performed. If so, can youplease providethe TF test reports for RY2010 – RY2014? If this data is not available, please let us know and we willdocument and close the door on this issue.4Thank you in advance for your continued assistance.Matt Hakos**From:**Coomes, Jamie [mailto:Jamie.Coomes@centuryaluminum.com]**Sent:**Wednesday, April 08, 2015 10:44 AM**To:**Hakos, Matthew**Cc:**'Putney, David'; Coomes, Brandon; Green, David A.**Subject:**RE: FW: Bag Leak Detection System RequestSorry for any confusion on this.Potlines 1-4 do not have BLD because it is a wet scrubber system.Potline 5 has 6 baghouse modules each with BLD and1 common exhaust stack with a particulate counter .Carbon Bake scrubber has 4 baghouse modules each with BLD and 1 common stack with a particulate counter.Paste Plant Pitch Fume Scrubber – Has no BLDThanksJamieFrom:Hakos, Matthew [mailto:mhakos@rti.org]Sent:Tuesday, April 07, 2015 12:10 PMTo:Coomes, JamieCc:'Putney, David'; Coomes, Brandon; Green, David A.Subject:RE: FW: Bag Leak Detection System RequestHey Jamie,Thank you for your reply. Just to be clear, can youplease confirm that the paste plant and anode bakefurnace stacks (for the two facilities listed below) alreadyhave BLDS and will not need BLDS in the future?I ask this because it looks like Century KY (pasteplant) may have one stack without BLDS.Thanks you in advance,Matt**From:**Coomes, Jamie [mailto:Jamie.Coomes@centuryaluminum.com]**Sent:**Tuesday, April 07, 2015 1:01 PM5**To:**Hakos, Matthew**Cc:**'Putney, David'; Coomes, Brandon**Subject:**FW: FW: Bag Leak Detection System RequestHere is the info on Hawesville.From:Marksberry, JamesSent:Tuesday, April 07, 2015 11:12 AMTo:Coomes, JamieSubject:RE: FW: Bag Leak Detection System RequestFacility NameSub-CategoryPaste PlantAnode Bake Furnace# of PastePlant# of Stacks# of Stackswith existingBLDS# of Furnaces# of Stacks# of Stackswith existingBLDSAlumax - Mt.HollyCWPB1 Yes (1)11Yes (1)18 BLD unitsCenturyAluminum -SebreeCWPB1 Yes (1)Yes (1)CenturyAluminum ofWVCWPB2 Yes (1)Yes (1)CenturyAluminum ofKYCWPB3 Yes (1)21Yes (1)11From:Coomes, JamieSent:Tuesday, April 07, 2015 8:16 AMTo:Marksberry, JamesSubject:FW: FW: Bag Leak Detection System RequestFrom:Courtney, Scott [mailto:Scott.Courtney@alcoa.com]Sent:Tuesday, April 07, 2015 7:46 AMTo:Coomes, Brandon; Owens, MattCc:Coomes, Jamie; Wiggins, RickSubject:RE: FW: Bag Leak Detection System Request6Brandon:Mt. Holly information is below. Our Bake Furnace Scrubber has a common stack, but a BLD unit is installed in the outlet of each of the 8 scrubbercompartments. Let me know if you have any other questions.Thanks,**Scott E. Courtney, P.E.**Environmental ManagerPO Box 1000 Goose Creek, SC 29445843.569.8606 (Office)843.296.0220 (Cell)843.572.5378 (Fax)scott.courtney@alcoa.comFrom:Coomes, Brandon [mailto:Brandon.Coomes@centuryaluminum.com]Sent:Monday, April 06, 2015 12:09 PMTo:Courtney, Scott; Owens, Matt (Century Aluminum)Cc:Coomes, Jamie; Wiggins, RickSubject:EXT: FW: Bag Leak Detection System RequestImportance:HighScott,Please see the email below from Mr. Hakos. Pleasecomplete the table below and I can submit after thewhole table is completed.Matt,Can you complete the section for Ravenswood?Thanks,**Brandon Coomes**Environmental Engineer, Sebree9404 State Route 2096Robards, KY 42452270.521.7454 (Century Aluminum Sebree, LLC)7270.860.0057 (Mobile)brandon.coomes@centuryaluminum.comFrom:Hakos, Matthew [mailto:mhakos@rti.org]Sent:Monday, April 06, 2015 10:58 AMTo:Coomes, Brandon; Coomes, JamieCc:Green, David A.; Putney, DavidSubject:Bag Leak Detection System RequestImportance:HighJamie and Brandon,I am working with EPA regarding the bag leak detection system requirements for Primary Aluminum. Specifically, we are seeking more informationregarding the number of stacks associated with paste plants and anode bake furnaces. Could you pleaseprovide the number of stacks for each pasteplant and anode bake furnace and indicate whether or not BLDS is (or is not) already installed. Please use the table below.Facility NameSub-CategoryPaste PlantAnode Bake Furnace# of PastePlant# of Stacks# of Stackswith existingBLDS# of Furnaces# of Stacks# of Stackswith existingBLDSAlumax - Mt.HollyCWPB1 Yes (1)11Yes (1)18 BLD unitsCenturyAluminum -SebreeCWPB1 Yes (1)Yes (1)CenturyAluminum ofWVCWPB2 Yes (1)Yes (1)CenturyAluminum ofKYCWPB3 Yes (1)Yes (1)Thank you in advance for your assistance,Matt HakosRTI International3040 Cornwallis RoadResearch Triangle Park, NC 27709(919) 541-6608