The purpose of this webinar is to identify and provide examples of commonly encountered illicit discharges, discuss various methods and means available to assist with the elimination of illicit discharges, and to provide guidance for IDDE program compliance documentation. Wessler has developed an IDDE Field Guide to assist MS4 personnel with illicit discharge identification, elimination, and documentation. This field guide is available for download here. The webinar will provide viewers an opportunity to fulfill their annual MS4 training requirement.