Chemical Leak in Yakima Causes Hazmat Situation - NBC Right Now/KNDO/KNDU Tri-Cities, Yakima, WA |

YAKIMA, Wash.-- Students at Davis High School in Yakima say they were told to leave the campus about 3:30 Thursday because of a gas leak.

Four construction workers who may have come into contact with the gas, then led to a hazardous material situation at Yakima Regional Medical Center.

Hospital staff de-contaminated them as a precaution.

Firefighters say the workers suffered what they call mild to moderate exposure to the chemical.