Laserfiche WebLink
Respondent's geographic region,and all analyses of such storms will <br /> � , used a temporal rainfall distribution pattern recognized in the technical <br /> � literature as appropriate for Respondent's aeographic region. <br /> iii. Use of adequaxe, ac�urate,and sufficiently current physical data(e.g., <br /> invert and ground elevations,pipe diameters,slopes,pipe run lengths, <br /> Manning roughness factors,manhole sizes and configurations,pump <br /> stations performance factors,etc.), based on existing and obtained <br /> survey data. <br /> iv. Proper model verification and calibration using dry weather and wet <br /> weather flow data. <br /> v. Characterization of both the Combined Sewer System and the Separate <br /> Sanitary Sewer System performance by identifying,for each dry and wet <br /> weather condition considered,each pipe segment operating in <br /> surcharged condition, and each manhole or structure at which a Sanitary <br /> Sewer Overflow,an Unauthorized Combined Sewer Overflow,or a <br /> Property Backup might be expe�ted to occur. <br /> e. Identify both short-term and long-term alternatives to eliminate sources of UI <br /> and/or potential hydraulic deficiencies that cause SSOs, Unauthorized Combined <br /> Sewer Overflows,and Property Backups to occur within the Respondent's <br /> Combined Sewer System and Separate Sanitary Sewer System. Specially, each <br /> alternative,at a minimum,must: <br /> i. Either eliminate the sources of excessive I/I or the hydraulic deficiencies <br /> or take other measures identified in coordination with SDD to eliminate <br /> Sanitary Sewer Discharges,Unauthorized Combined Sewer Discharges, <br /> and Property Backups, <br /> ii. Provide a cost/benefit analysis for each altemative. <br /> iii. Recommend alternatives and implementation schedules for removing UI <br /> sources,hydrauIic deficiencies, or other measures to eliminate Sanitary <br /> Sewer Discharges,Unauthorized Combined Sewer Discharges, and <br /> Property Backups. <br /> iv. Include a prioritized list of projects and a schednle for the <br /> � implementation of all recommended projects, with a final completion <br /> date of no later than two years after the final approval of the fmal SSA <br /> Study. If a project is not recommended or if an implementation schedule <br /> is affected due solely to the affordability of the project,Respondent must <br /> provide an analysis of the cost effectiveness of the project, including any <br /> impacts on its user rates. <br /> A4 <br />