Through our Illicit Discharge Detection and Elimination (IDDE) program, we conduct a regular shoreline surveys to identify and characterize shoreline outfalls. If we observe a dry weather discharge, we perform an intense investigation to confirm the source of the discharge and to eliminate it. As an enchancement to the IDDE program, we designed a Sentinel Monitoring Program, in cooperation with New York State Department of Environmental Conservation (DEC), to periodicly monitor and sample 80 ambient stations throughout New York Harbor. We perform sampling after a dry period of forty eight hours and during various tidal cycles and seasons to ensure statistical integrity. We compare the sampling results to an established baseline set by the DEC. If sampling results are above the baseline, we aggressively pursue field investigations and surveillance of the adjacent shoreline to determine the source and cause of the contamination and implement immediate actions to abate any illegal discharges. We follow all shoreline survey protocols described in the Untreated Discharges section of the WWTP SPDES permit.