1From:Coomes, Jamie <Jamie.Coomes@centuryaluminum.com>Sent:Wednesday, April 08, 2015 10:44 AMTo:Hakos, MatthewCc:'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 and 1 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 you please confirm that the paste plant and anode bake furnace 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 (paste plant) may have one stack without BLDS.Thanks you in advance,MattFrom:Coomes, Jamie [mailto:Jamie.Coomes@centuryaluminum.com]Sent:Tuesday, April 07, 2015 1:01 PM2To:Hakos, MatthewCc:'Putney, David'; Coomes, BrandonSubject: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 Request3Brandon: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 CoomesEnvironmental Engineer, Sebree9404 State Route 2096Robards, KY 42452270.521.7454 (Century Aluminum Sebree, LLC)4270.860.0057 (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 please provide 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.HollyCWPB1Yes (1)11Yes (1)18 BLD unitsCenturyAluminum -SebreeCWPB1Yes (1)Yes (1)CenturyAluminum ofWVCWPB2Yes (1)Yes (1)CenturyAluminum ofKYCWPB3Yes (1)Yes (1)Thank you in advance for your assistance,Matt HakosRTI International3040 Cornwallis RoadResearch Triangle Park, NC 27709(919) 541-6608