Con Edison Electric Substation Oil Spill Contingency Plans

D&B prepared Oil Spill Contingency Plans for 278 electric substations sites throughout New York City, Dutchess County, Rockland County and Westchester County. Each site contained oil-filled equipment subject to the requirements of the USEPA’s Oil Pollution Prevention regulations (40 CFR Part 112), which requires owners or operators of regulated facilities prepare Oil Spill Contingency Plans and Spill Prevention, Control and Countermeasure (SPCC) Plans where secondary containment for oil-filled equipment is impracticable.

Risk assessments were first conducted at each substation to determine the potential impacts of an oil discharge and the potential for off-site drainage to enter nearby waterbodies and drainage structures. Drainage maps were then obtained from the respective municipalities to pinpoint potential sewer system pathways, subsequently leading to the identification of the receiving wastewater treatment plants and waterbodies. Spill response deployment areas were also identified and included specific locations for spill response actions that were prioritized based on the different scenarios and degrees of impact.

All data gathered was digitized, geo-referenced and combined with data on topography, roadways, surface waters and landmarks to determine the potential oil discharge pathway for each substation. This information was then imported into GIS and symbolized to depict the overland flow of oil in the event of a spill. The integration of the data from the various sources into GIS provided for useful and informative maps that were integrated into each site-specific plan.