The Oregon Health Authority released a report Tuesday that concludes exposure to air pollutants near the AmeriTies facility in The Dalles did not pose chronic public health risks.  But the “AmeriTies-West Letter Health Consultation” report, authored by the federal Agency for Toxic Substances and Disease Registry, cautions that strong odors could still trigger physical symptoms.  The report was prepared at the request of the North Central Public Health District.  The district requested help in understanding if exposure to outdoor air pollutants—naphthalene and other polycyclic aromatic hydrocarbons—posed long-term health risks to residents near the AmeriTies West facility, which treats wooden railroad ties.  The Oregon Department of Environmental Quality signed a mutual agreement and order with AmeriTies in April 2016 to reduce odors, including the company using a different wood preservative with less naphthalene.  That change was made in late 2016.   An air quality open house is planned for May 15 from 6 p.m. to 8 p.m. at Columbia Gorge Community College in The Dalles.  To read a summary of the report and the full report findings and recommendations, visit the OHA AmeriTies webpage at www.healthoregon.org.  It is also available at The Dalles-Wasco County Library.