http://www.metroplexenvironmental.com/socal_metroplex/socal_introduction.html

"The FAA has prepared a Draft Environmental Assessment (EA) in accordance with FAA Order 1050.1E to document the potential environmental effects associated with the optimization of aircraft routes and the supporting airspace management structure serving aircraft operating under instrument flight rules (IFR) while departing from or arriving to the Southern California Metroplex area...

...The Draft EA for the SoCal Metroplex project was released and made available for public review and comment on Wednesday, June 10, 2015. A copy of the document can be downloaded from the documents webpage, or viewed at selected public libraries. The public is invited to comment by mail or email. Contact information is available on the public input webpage. Written comments will be accepted by the FAA until Friday, July 10, 2015.

The FAA invites the public to attend public information workshops for the Draft EA. During the workshops, representatives from the FAA and its Consultant Team will be available to answer questions about the project. The workshops will be open-house format and participants can attend anytime at the times and locations listed below."