A number of gas leaks were discovered in a floating cover of a storage tank the holds roughly 35,000 cubic feet of methane gas at peak storage.
Municipal Services Director Dan Madden reported to the City Council at Tuesday night’s meeting that “There is some, at this point relatively low, risk for potential for an explosive condition with this gas leaking out into the atmosphere.”
“Staff wanted to provide this update to you to let you know that this is a potential hazard the city is facing,” said Madden. “At this point in time my intent is to declare this situation an emergency and that would give the city the leeway to hire a contractor to get the repairs made.”
Madden briefed the City Council on the one (of the six) anaerobic digesters that had leaks in the floating cover.
The digester with the leaking cover serves as a storage tank, not only for liquids as well as gas. This anaerobic digesting processing produces methane gas as waste water is treated. The storage digester, anaerobic digester number 4, has a floating cover. The cover raises and lowers as the gas production increases or decreases, as well as the liquid levels decreases or increases.
“During the course of the 33 of that digester’s operation, recently we’ve discovered that there are a number of leaks in that floating cover,” said Madden.
This was discovered as a result of the evaluations the City has been doing relative to the TID Fuel Cell, in fact that fuel cell operates off the methane gas produced by the City of Turlock’s Regional Water Quality Control Facility.
Madden said that City Staff would get more information on the leak and possible solutions to present to the Turlock City Council in early April.