At approximately 1700hours SQ2723 (As part of Burlington County HAZMAT team) responded to a chemical plant in Fieldsboro for a burning drum of sulfur. The incident was initially detailed to the local fire departments that were alerted by an employee that pulled a fire alarm. Upon arrival the crews realized that it was a HAZMAT type incident and called for HAMMER-15. The crew worked as part of the HAZMAT response and assisted the local fire departments with mitigation of the incident. The crew was on scene for about an hour.