The ERMS Joint Industry Program (JIP) was initiated to develop an environmental risk-based decision support tool, to assist the oil industry in establishing cost-effective mitigation measures for reducing potential harmful discharges to the marine environment from drilling discharges. The concept was based on the PEC/PNEC ratio approach as a basis for calculation of Environmental Impact Factors (EIFs), as was successfully developed for produced water discharges through the DREAM (Dose-related Risk and Effect Assessment Model) program.