Document wrOv7ZNkDX5pE45o2zOjLngg3

Message From : Sent: To: CC: Subject: Attachm ents: Wehrum, William L. [wwehrum@hunton.com] 9/28/2017 3:53:08 PM Horner, Elizabeth (EPW) [Elizabeth_Horner@epw.senate.gov] Ringel, Aaron [/o=ExchangeLabs/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=1654bdc951284a6d899a418a89fb0abf-Ringel, Aar] Silica Question Silica Question-c.docx Hi Elizabeth. Here is a revised version of the silica question. I left you a voice mail with a bit more explanation. WHuIlniJtAoMn S Bill Wehrum P a rtn e r vvwe h ru m hunton c o m p 202.9554637 bio j vC ard 1 blog 1 U nksdin H unton & W illiam s LLP 2200 P ennsylvania Avenue, NW W ashington, DC 20037 i hunton.com Sierra Club v. EPA 18cv3472 NDCA Tier 1 ED 002061 00156483-00001