Ross Valley Sanitary District officials are investigating a San Anselmo sewage spill where an overflowing manhole released an estimated 88,000 gallons of sewage.
A resident who lives at 64 Woodside Drive reported sewage coming from the manhole in an easement behind the residence at 8:55 p.m. on Oct. 30.
The spill was originally reported as a 2,000-gallon spill before it was upgraded to a 5,000-gallon spill and then became an 88,000-gallon spill after district officials interviewed residents in the area.
Officials determined the manhole had been overflowing since Friday, Oct. 26 and calculated the estimated amount of spilled sewage by calculating the daily volume of sewage that comes from homes connected to the sewage line.
Signs have been posted in the area and the district is working with the Marin County Environmental Health department and San Anselmo town officials to determine the path of the spill and to investigate if the sewage entered any nearby water. “Due to the terrain in this area, this is difficult to ascertain,” said RVSD Acting General Manager Wendy Martin-Miller in a release.
Check back for updates.
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