UNITED STATES ENVIRONMENTAL PROTECTION AGENCY REGION 8 1595 Wynkoop Street DENVER, CO 80202·1129 http://WNW.epa.gov/region08 Ref: 8P-W-WW DEC 5 ZOI4 CERTIFIED MAIL RETURN RECIEPT REQUESTED Colonel John W. Wagner Commander, 460th Space Wing 510 S. Aspen St, MS 88 Buckley AFB, Colorado 80011-9572 1 Re: Final Modification to United States Department of Air Force, 460 h Space Wing, Buckley MS4 NPDES Permit, CO-R042003 Dear Commander Wagner: Enclosed is the final Modification and Fact Sheet for Environmental Protection Agency National Pollutant Discharge Elimination System (NPDES) Final Modified Permit, CO-R042003 (and Statement of Basis), issued to the United States Department of Air Force, 460111 Space Wing for the Buckley Air Force Base Municipal Separate Storm Sewer System (l'v1S4). This permit modification shall become effective January 12, 2015, unless, within thirty (30) days following the date of service of this permit, a petition for review of the pe1mit modification is filed with the Environmental Appeals Board (EAB) in accordance with the provisions of 40 CPR§ 124.19. If you decide to file a petition for review with the EAB, the petition must contain all infmmation required by 40 CFR § 124.19(a)(4). Additional infom1ation about the EAB requirements is available at the EAB's web site: http://epa.gov/eab/. A petition submitted through the U.S. Postal Service (except by Express Mail) must be addressed to: U. S. Environmental Protection Agency Envirorunental Appeals Board 1200 Pennsylvania A venue, NW Mail Code 11 03M Washington, DC 20460-0001 All documents that you hand-carry in person or that you arrange to have delivered by courier, Express Mail, or anon-U.S. Postal Service carrier (such as Federal Express), must be delivered to: U.S. Envirorunental Protection Agency Environmental Appeals Board EPA East Building 1201 Constitution A venue, NW Room 3334 Washington, DC 20004 If you have any questions regarding the requirements of this permit modification, please direct them to Amy Clark at (303) 312-7014 or [email protected]. Callie A. Videtich Acting Assistant Regional Administrator Office of Partnerships and Regulatory Assistance Enclosures cc: With Enclosures Ms. Janet Kieler, Section Manager Water Quality Division Colorado Department of Public Health and Environment Corwin Oldweiler Water Quality Program Manager, 460 CES/CEIE 660 S. Aspen St. MS 86 Buckley AFB, CO 80011-9564 Kent I. Scott-Smith Environmental Litigation Attorney Air Force Legal Operations Agency Environmental Law & Litigation Division 1500 West Perimeter Road, Suite 1500 Joint Base Andrews, MD 20762 cc: Without Enclosures Rebecca Hammer Project Attorney, Water Program Natural Resources Defense Council 1152 15'" StreetNW, Suite 300 Washington, DC 20005 Caitlin Peale Sloan Staff Attorney Conservation Law Foundation 62 Summer Street Boston, MA 0211 0 Jeffi-cy Odefey Director of Clean Water Supply Programs American Rivers 2150 Allston Way, Suite 320 Berkeley, CA 94704 .