On Dec. 1, 2009, EPA issued new stormwater effluent limitations guidelines (ELGs) and new source performance standards (NSPS), including numeric effluent discharge limits for pollutant turbidity, and discharge monitoring requirements. The numeric ELGs will be phased in over four years for construction sites that disturb 10 or more acres and 18 months for sites disturbing 20 or more acres. The new requirements will be incorporated into EPA's next construction stormwater general permit when the current general permit expires in June 2011. In delegated states, the new requirements will be incorporated once their current general permits expire and new general permits are issued.
Additionally, EPA is considering new regulations to control post-construction stormwater discharges from newly developed and redeveloped sites. EPA proposed issuing information collection surveys to affected owners, operators, developers, contractors and government agencies. EPA solicited comments by the end of December from the regulated community on a draft version of the survey, which would require detailed information about stormwater management and control practices, local regulations, and baseline financial information.