City Council members are scheduled to hear a briefing on the potential for recontamination of sediments in the Thea Foss Waterway by compounds known as phthalates during the May 9 study session. Tacoma is working in cooperation with Seattle, King County and regulatory agencies to address the issue of phthalates, which are plasticizers that are widely used in household and automotive products that can be found in urban stormwater runoff. The Council will not take public comment during the study session. 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). On-demand audio archives are available on the Web within 24 hours of the meeting at http://www.tvtacoma.com .