(WSPA) -- Several crews battled a fire at a landfill in Union County.
Cross Keys Fire Department Chief Stephen Stone said they were dispatched to the fire just after 4 a.m. Friday.
The landfill is on Wildcat Road near the Spartanburg County line.
While crews had a difficult time establishing a route to the fire, Chief Stone said the blaze was quickly knocked back.
He said every resource was dispatched in Union County, along with four fire stations from Spartanburg County.
He said S.C. Department of Health and Environmental Control (DHEC) was also on the scene.
Chief Stone said he asked DHEC to monitor the landfill and expressed concerns about air quality.
He urged residents living near the landfill to see a doctor if they get ill, adding that firefighters don't know exactly what burned in the fire.
Six months ago, Chief Stone said contacted DHEC with his concerns about the facility.
DHEC is the state agency that regulates solid waste facilities, including landfills.
“I think DHEC needs to reassess how they’re policing our landfills in our state,” Chief Stone said.
He said he's asked for more resources for his department, including initial air quality monitoring equipment on trucks and a four-wheel drive truck to respond to calls at the facility.
A truck got stuck while crews were responding to the fire.
Chief Stone said it's the second fire at the landfill in about five years.
He said it's his job to help ensure community safety.
“I have continuous concerns of how we respond here because this is my second event," he said.
Chief Stone said it's unknown what caused the fire. He said it could have been a hot ember or spontaneous combustion.
7News has reached out to DHEC for more information.