A company maintenance technician unintentionally opened a valve on top of an isotanker at Syngenta Ltd’s Huddersfield plant resulting in the release of between 3.5 and 3.8 tonnes of paraquat dichloride solution. The Health and Safety Executive (HSE) prosecuted the firm over the incident.

Syngenta Ltd of Leeds Road Huddersfield pleaded guilty to breaching Regulation 4 of the Control Of Major Accident Hazards Regulations 1999 and Regulation 5(1) of the Provision and Use of Work Equipment Regulations 1998 and was fined £200,000 with £13,041 costs by Leeds Crown Court.

After the hearing, HSE inspector Angus Robbins commented: “This incident could have been prevented if Syngenta had properly assessed the real risk of the valve being opened while the tank was under pressure.”