CLEVELAND—Federal and state health agencies plan to release findings Wednesday in response to a union’s claim of high cancer rates at the NASA Glenn Research Center in Cleveland.

The Lewis Engineers and Scientists Association says cancer has been diagnosed during the past three to five years in 35 to 40 of the 100 workers on the third floor of an engineering building.

The union represents more than 1,500 scientists, clerks and other workers.

The Ohio Department of Health and the National Institute for Occupational Safety and Health planned to announce their findings at an afternoon news conference.

Past reports from those health agencies have said the site’s cancer rates are within the normal range of the general population.