The Glen Cove High School auxiliary gym floor is being replaced after testing found mercury vapor levels nearly four times the limit allowed by the state, according to district officials.

Test results indicated vapor levels of 2.94 micrograms per cubic meter, officials said in a letter sent to the community earlier this month. The state threshold is 0.75 micrograms per cubic meter.

"During preliminary planning for the replacement of the middle school top and bottom gym floors this summer, the district’s environmental consultants informed us that those types of gym floors, produced during the 1960s, '70s and '80s, frequently used mercury in their construction to increase floor flexibility," district spokesman Ron Edelson said in a statement Tuesday. "It was that knowledge that prompt

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