Document GKvXr17YKjZ6dJrkbd10LV21n

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Message From : Sent: To: Subject: G reenw alt, Sarah [/0=EX C H A N G ELA B S/O U =EX C H A N G E A D M IN ISTRA TIV E G RO U P (FYD IBO H F23SPD LT)/CN =R ECIPIEN TS/CN =6C13775B8F424E90802669B 87B 135024-G REEN W A LT] 7/21/2017 11:09:41 PM dchung@ crow ell.com Q u ick Pho ne Call Hi David, Hope all is well. Would you mind giving me a quick call when you have a few minutes? My cell is listed below. Thanks! Sarah A. Greenwalt Senior Advisor to the Administrator for Water and Cross-Cutting Issues U.S. Environmental Protection Agency Work: 202-564-1722 | Celkj Ex. 6 ] Greenwalt.Sarah@epa.gov Sierra Club v. EPA 18cv3472 NDCA Tier 3/4 ED 002061 00108637-00001