Duff Collins is a senior vice president of Woodard & Curran. He has more than 30 years of environmental consulting experience managing and conducting field investigations, feasibility studies, and remediation activities at hazardous waste sites for clients in the private and public sectors. He has been an active member of the MassDEP BWSC External Audit Workgroup since its inception and was extensively involved in the evaluation and documentation of the standard of practice for licensed site professionals.