Ten first responders – including 3 firefighters and 7 police officers -- are being treated at a hospital after being exposed to this morning’s three-alarm chemical fire at a pool supply company. Everyone injured is in stable condition, at this hour, at Medical City Plano.

The cause of the fire at Texas Pool Supply, 10550 John W. Elliott, #100, remains under investigation; however, the Frisco Fire Marshal is looking into whether a pallet of chemicals stored outside the building may be to blame.

“A company employee noticed a vapor,” said Chief Kelly Kistner, Fire Marshal, Frisco Fire Department. “A fire and explosion followed. A nearby truck and the company’s building caught fire. But it’s important to note, damage to the interior is limited thanks to the building’s sprinkler system.”

The company employee reported the fire at 7:44 a.m. Seventy-eight first responders – including employees with Frisco Fire, Police and Public Works departments – reported to the scene. By 9:28 a.m., the fire was called ‘out’.

The Frisco Fire Marshal shares chlorine and ‘pool shock’ (Trichlor & Sodium) were involved. As a result, a ‘shelter in place’ advisory was issued (at approximately 8:25 a.m.). The ‘shelter’ advisory was lifted around 9:30 a.m.

The Frisco Fire Marshal shares other chemicals were inside the building; however, the fire was limited to the Trichlor and Sodium chemicals.

“In a situation like today’s, we always implement decontamination procedures,” said Chief Lee Glover, Frisco Fire Chief. “This morning, we discovered some of our first responders developed symptoms they didn’t start the day with. So, we transported them to a hospital as a precautionary measure.”

Access to the industrial park, east of John W. Elliott, remains closed.

The Little Elm Fire Department responded to the scene. Mutual aid was also received from The Colony, Plano, Prosper and McKinney Fire Departments. The Texas Commission on Environmental Quality (TCEQ) is on the scene. The Environmental Protection Agency was also contacted.