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Main office at Portland's Lent School closed due to high radon levels

A second round of radon testing in six rooms at four Portland schools revealed persistent very high levels of radioactive radon in the Lent School main office, so office functions have been moved to another room in the school, district officials announced late Thursday.

It is the latest in a long string of environmental safety problems revealed by officials in Oregon's largest school district this spring and summer.

Radon is an invisible, odorless gas that occurs naturally in the ground. Exposure over long periods of time can lead to lung cancer. Even when vented 24 hours a day, the Lent office gave off radon readings at three time the federal danger threshold....

Full article here: http://www.oregonlive.com/education/index.ssf/2016/06/main_office_at_portlands_lent.html