Conduct on-site, scheduled and unannounced inspections of industrial and commercial firms including firms with a high degree of complexity such as hazardous waste treatment facilities, electroplating/metal finishing facilities, chemical manufacturers, etc., to ensure compliance with Narragansett Bay Commission (NBC), DEM, and Federal EPA rules and regulations. Write, negotiate and issue Wastewater Discharge Permits, correspondence and reports. Review analytical data and sample results and user pretreatment, process, operations and spill control plans, etc. Perform complex engineering calculations. Respond to emergency or special investigations as required. Lifting heavy/awkward items may be required. Perform other duties as assigned, within skill and experience capabilities.