(02-01) 17:06 PST MILL VALLEY -- About 2.7 million gallons of both raw and treated sewage overflowed from a Marin County treatment facility into San Francisco Bay after an alert system failed to properly notify workers at the facility, officials said today.Signs have been posted along the Tiburon shoreline and at many popular San Francisco beaches - including Crissy Field, Baker Beach, Aquatic Park and China Beach - to discourage people from swimming in the water. However, San Francisco officials said they do not belive the spill will pose a danger to swimmers. Commercial fishing is also not expected to be affected.
Nearby cities and counties were notified of the spill starting late this morning and into the afternoon. Notifications weren't sent to the media until just before 1 p.m. - nearly 20 hours after the spill occurred Thursday evening.