Storm Water Controls

(1) Performance Standard. Storm water controls shall prevent erosion, discharge of pollutants, protect the physical integrity of the landfill and be managed according to applicable standards established by the Department, including but not limited to, wetlands protection regulations at 310 CMR 10.05(6)(b), and the Department’s Storm Water Policy. For purposes of meeting stormwater standards established by the Department, recharge shall be permitted at the landfill only where the recharge will not adversely impact the quality of groundwater leaving the site. Peak rate attenuation shall be in accordance with that described in 310 CMR 19.115(2): Design Standards, and source controls and pollution prevention measures (including design of the landfill) shall be implemented to prevent discharge of pollutants. This standard applies to the construction, operational and post-operational phases of the landfill. (2) Design Standards. Storm water controls shall be designed to: (a) prevent flow onto the active portion of the landfill (i.e., any area without intermediate or final cover) during the peak discharge from a 24 hour, 100-year storm; (b) control the peak rate of run-off from the entire landfill resulting from a 24 hour, 25-year storm; and (c) control the peak rate of run-off from the landfill resulting from a 24 hour, 100-year storm, to the extent practicable, if an evaluation of the peak rate of run-off resulting from a 24-hour, 100-year storm indicates there will be flooding up or downstream of the site using the most recent precipitation atlas approved for use by the United States National Weather Service, or their predecessor the U. S. Weather Bureau to determine the rainfall depth associated with the 100-year storm (currently Technical Paper-40, published May, 1961).