Staff from the Tacoma Economic Development and the Public Works Departments will provide the City Council Sept. 20 with an overview of proposed updates to the City’s Critical Areas Preservation Ordinance (CAPO) and the environmental policy element of the Comprehensive Plan. The updates are a continuation of the work started in 2004 to comply with the “best available science” requirements of the Growth Management Act. The Council is also scheduled to hear an update from Sound Transit Chief Executive Officer Joni Earl regarding the agency’s projects. The public may attend the noon study session in Room 16, Tacoma Municipal Building North, 733 Market St., but the Council will not take public comment. CityPost (Channel 85 on Click!, Channel 77 on Comcast) will air the audio portion of the session live. Replays of the study session audio may be heard Wednesday nights at 7 p.m. on CityPost (Channel 85 on Click!, Channel 77 on Comcast).