Laserfiche WebLink
System and Separate Sanitary Sewer System and the documentation of the condition of <br /> portions of the Respondent's Combined Sewer System and Separate Sanitary Sewer <br /> � System causing or contributing to SSOs,Unauthorized Combined Sewer Overflows,and <br /> Property Backups. The goal of the SSA Study is to identify sources and estimate <br /> quantides of excessive UI entering Respondent's Separate Sanitary System,to eliminate <br /> sources of excessive UI entering the Respondent's Separate Sanitary System,to mitigate <br /> the impact of excessive UI on SSOs and Property Backups within Respondent's Separate <br /> Sanitary Sewer System and to develop alternatives to reduce ident�ed sources of UI. <br /> The SSA study will also target the Respondent's Combined Sewer System through the <br /> modeling of both the sanitary sewer systems and the development of altematives to <br /> prevent Unauthorized Combined Sewer Overflows and Property Backups within the <br /> Combined Sewer System. The final SSA Study must include,but is not limited to: <br /> a. An chan es and deviations from the a roved SSA work lan. <br /> Y g <br /> PP P <br /> b. A physical survey of both the Combined Sewer System and the Separate Sanitary <br /> Sewer System necessary to determine the extent of both systems. This includes <br /> the confirmation of the location,size,and capacity of all major sewers,manholes, <br /> and pump stations <br /> c. A lon�term plan to visually inspecting major sewers,manholes, and pump <br /> stations for structural deficiencies, if not already done so. <br /> d. An assessment of the various components of the sanitary sewer system to further <br /> identify areas within the Separate Sanitary Sewer System with the highest <br /> contribution of N and to prioritize mitigation in these locations. Through this <br /> assessment,Respondent must include but not be Iimited to the following <br /> elements: <br /> i. Monitor the contribution from rainfall to a sewershed within the <br /> Respondent's jurisdictional boundary through the use of rain gauges,as <br /> necessary to the UI prioritization of sub-basins described above. <br /> ii. Conduct both a dry and wet weather flow monitoring program,at a <br /> minimum,at key locations within the Combined Sewer System and the " <br /> Separate Sanitary Sewer System. Such monitoring should be conducted to <br /> adequately chazacterize both the sanitary sewer collection systems with <br /> respect to sewersheds,sewer sub-basins,or city neighborhoods within the <br /> Separate Sanitary Sewer Collection System that exhibit high UI. <br /> iii. Tdentify the locations of sources of UI clear water entry into the separate <br /> sewer system,and estimate the benefit(in terms of dollars per gallon of UI <br /> removed)of removing each source. <br /> A2 <br />