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a. Following inspection and sampling, within twenty-four (24) hours of discovery, the MS4 Operator must initiate track down procedures for flowing MS4 monitoring locations with obvious illicit discharges. b. Within two (2) hours of discovery, the MS4 Operator must initiate track down procedures for obvious illicit discharges of sanitary wastewater that would affect bathing areas during bathing season, shell fishing areas or public water intakes and report orally or electronically to the NYSDEC Regional Water Engineer and local health department; and c. Within five (5) days of discovery, the MS4 Operator must initiate track down procedures for suspect illicit discharges. d. Consult sewer and land use maps to evaluate potential contributing area and characteristics of the area. e. Visually inspect catch basins/manholes/ditches progressively upstream from the outfall/monitoring location to identify contributing areas with no flow that can be eliminated from further consideration. f. It is possible that the visual inspections indicate the source of flow/contamination is from another MS4 entering your system at an interconnection. Contact their stormwater coordinator, in writing, and describe your findings along with a precise location for the point where flow from their system enters your system. Keep this documentation for 5 years. Add a note in your files or on the outfall report itself to save time and trouble for the next inspection. g. See Track Down Techniques table for additional track down options. Track Down Techniques to Locate the Discharge Technique Best Applications Limitations Dye Testing Discharge limited to a ve ry • May be difficult to gain small drainage access to some properties area (°<10 properties is ideal) • Discharge probably caused by a connection from an individual property • Commercial or industri al land use Video Testing • Contin uous discha rges • Relativel y expensive • Discharge limited to a eq uipment singl e pipe segment • Ca nnot capture non- • Communities w ho own flowing discharges equipment for other • Often cannot capt ure invest igations discha rges from pipes submerge d in the storm drain Smoke Testing • Cross-connecti on with the • Poor notificati on to public sanitary sewer can cause alarm • Identifying other • Ca nnot det ect all illicit underground sources (e.g., discha rges leaking storage t echniques) caused by damage to t he storm drain (Illicit Discharge Detection and Elimination: A Guidance Manual for Program Development and Technical Assistance, Center for Watershed Protection October 2004)