Document p22Nyz1b0Xy76Y9mo4DBJ3qzE

Message From: Sent: To: CC: Subject: Attachments: Charles Ingebretson [Clngebretson@ajw-inc.com] 4/27/2018 9:55:03 PM Wehrum, Bill [/o=ExchangeLabs/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=33d96ae800cf43a3911d94a7130b6c41-Wehrum, Wil] Lewis, Josh [/o=ExchangeLabs/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=b22dld3bb3f84436a524f76ab6c79d7e-JOLEWIS] FW: GPF credit proposal Proposed Voluntary C02 Credit for Installing GPFs on Gasoline Cars.pdf Bill, thanks again for agreeing to take a look at the material sent earlier this week related to natural gas dual-fueled vehicles. On a separate issue, we have a client interested in seeing the NPRM on light-duty CAFE/ghg contain some mention of the prospect for an on-cycle ghg reduction credit for gas particulate filters (GPFs), due to their near elimination of black carbon and ultra-fine particles from GDI (gasoline direct injection) equipped vehicles. Attached is a discussion document with a problem statement and a brief discussion of benefits. Let me know if there's staff we could pursue this with. Thanks again. Sierra Club v. EPA 18cv3472 NDCA Tier 13 ED 002061 00181187-00001