PORTLAND, Ore. (AP) - Officials say a Portland high school cafeteria has been closed after dangerous levels of cancer-causing radon gas were found in a second round of tests.
The Oregonian/OregonLive reports test results were emailed to the Portland School District on Tuesday and announced Friday.
The high levels of radon were found at Alliance High School, an alternative school serving about 200 students with a focus on professional-technical skills.
Earlier this month, district officials said roughly 800 rooms in 26 buildings were tested for radon, and nine rooms in six schools exceeded an Environmental Protection Agency threshold that requires immediate follow up testing.
Radon is an odorless and invisible gas that can cause lung cancer.
