A stretch of Treasure Island coastline is closed after a pressurized sewer line burst Saturday, spilling 67,600 gallons of waste into the streets and likely contaminating the Bay.
The sewer main, which was installed in the mid-1990s, broke around 1 p.m. on the east side of the island at Avenue M and Third Street, San Francisco Public Utilities Commission spokesman Tyrone Jue said. The commission and departments of Public Works and Public Health responded and the leak was contained within half an hour, he said.
The island’s sewer system is separate from San Francisco’s, and a break in a main on the island flows into the Bay.
Initial water samples came back high for bacteria, Jue said, and signs warning against swimming have been posted.