EPA permit, $25,000.

--
Christopher A. Young
Learn more about Jesus
www.lds.org
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wrote in message
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Cut a piece of 1/2' plywood to cover the flange
and put a couple holes
in it. Make a gasket to put between flange and
plywood then bolt it
where the toilet bolts down.

3/4" plywood would be stronger.

Carbon fiber and epoxy molded to an exact airtight
fit may be called
for here. And don't forget about sensitive methane
monitoring
equipment!