Hydrofluoric acid in low doses can irritate the eyes, nose and respiratory tract, and in higher doses it can cause severe burns, chronic lung disease or even death, the Centers for Disease Control and Prevention says.
At 7 a.m., officials ordered an evacuation of 944 households. They said about 5,000 people were in the affected area.
Northampton County spokesman John Conklin said the truck driver was treated at a hospital and was released. One of about 200 people at an evacuation center at a local high school was taken to a hospital for a condition unrelated to the hazardous-materials incident.
Emergency crews reported liquid dripping from the tanker's valves or piping, forcing them to don full-protection suits to stop the drip. The tanker truck was righted at about 3 p.m., and the evacuation order was lifted soon after, although the road, Route 33, remained closed in both directions.
Conklin said animals in the affected area, including horses from several farms, were relocated.
CLICK HERE to follow Action News on Twitter
CLICK HERE to get Action News on your website
CLICK HERE to find Action News on Facebook
