A Specialist Environmental Protection Unit was deployed by the fire service following a road traffic collision which left a woman requiring hospital treatment.
The collision, which involved two vehicles, occurred on the A4113 between Bucknell Junction and Knighton, last Sunday evening, August 15.
Dyfed-Powys Police closed the road for around 12 hours following the incident, before it reopened shortly after 10am on Monday morning.
The two vehicles involved were a silver Mercedes car and a heavy goods vehicle, which was carrying over 200 litres of acid solution.
The fire service has confirmed that two casualties were released from a vehicle. One of the casualties, a woman, was taken to hospital in an ambulance.
Crews from three Powys fire stations were called out to the scene.
A spokesperson for the Mid and West Wales Fire Service said: “At 09:54pm on Sunday, 15/08/2021, crews from Knighton, Presteigne and Newtown attended a road traffic collision, involving a car and a heavy goods vehicle on the A4113, Knighton.
“Two casualties were released from the vehicle before the arrival of the Fire Service and one of the casualties, a female, was taken to hospital by the Ambulance Service.
“The heavy goods vehicle had a cargo of approximately 220 litres of acetic acid solution.
“Mid and West Wales Fire and Rescue Service deployed an Environmental Protection Unit to the incident and fire crews contained a leakage of the solution using chemical drums, absorbent granules, sixteen breathing apparatus, 10 gas tight suits, and LGV platform and small gear.
“The Police and Natural Resources Wales were also in attendance.
“The Fire Service left the incident at 07:11am (16/08/2021).”
The police force has said that one person was taken to hospital, with injuries not believed to be life threatening.
A spokesperson for West Midlands Ambulance Service confirmed: “We were called at 9:43pm on Sunday to reports of an RTC involving a car and lorry on the A4113 at Knighton.
“One ambulance attended the scene and we treated a woman, the driver of the car, for minor injuries and she was conveyed to Hereford General Hospital for further treatment.”
Officers from Natural Resource Wales (NRW) were called to the scene of the collision to assist the fire service in the clean-up.
NRW later confirmed that although an amount of the acid had spilled onto the road, it was deemed that the spillage posed no further environmental risk.
John Rock, Natural Resources Wales Duty Tactical Manager said: “We were called to attend a road traffic collision where an unknown amount of acetic acid had spilled onto the road from a heavy goods vehicle.
“Our role on site was to assist our Fire and Rescue Service colleagues who had contained the spill. We later advised our Powys County Council colleagues on the latter stages of the clean-up.
“The close cooperation and quick action from the multi-agency response has led to there being no further environmental risk to the area following the incident.”