Seven people were sent to the hospital Wednesday morning after a chemical spill on the Aerojet Rocketdyne campus in Rancho Cordova.
Investigators say while containers were being moved around 8:40 a.m., one was punctured, spilling 200 gallons.
Officials say the accident was caused by a pharmaceutical company, AMPAC Fine Chemicals, that rents space at the Aerojet Rocketdyne facility.
One person reportedly had direct exposure to the spill. Six others were taken to the hospital as a precaution.
Metro Fire, Aerojet Rocketdyne and AMPAC are investigating the spill.
Emergency crews responded to the Areojet Rocketdyne campus on Nov. 19 after an explosion injured two people.