Professional Services Agreement - MWH America - CSO LTCP Reassessment Phase 1C

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prepare a new Baseline WQ run, and update the Baseline Water Quality Scenario Technical Memo developed under Phase IA. 4. Develop a water quality model optimization integration tool to support linkage between the SWMM collection system model and the BLTM Water Quality Model for use in the OptiS WMM optimization tool developed by EmNet that will allow for an integrated analysis of improvement alternatives. This will involve developing a software "wrapper" that allows for the ready transfer of CSO hydrograph data from the S WMM collection system model into the BLTM water quality model, and exporting water quality results to OptiS WMM. 5. Prepare a Technical Memorandum to document the water quality model optimization integration tool. Task 12 Deliverables • Updated Technical Memoranda — Water Quality Model Calibration & Water Quality Model 2015 Baseline Water Quality Scenario • Technical Memorandum — St. Joseph River Water Quality Model Integration for optimization analysis of improvement options. LimnoTech will be responsible for production of this deliverable. Task 12 Assumptions • South Bend will provide their St. Joseph River and tributary (if available) monitoring data from 2015. • South Bend will assist the consultant with obtaining St. Joseph River and tributary monitoring data from Elkhart and Mishawaka, if needed. • The cities of Elkhart and Mishawaka will provide their water quality monitoring data within four weeks of notice to proceed. • Hourly volumes from collection system hydraulic model will be provided to the water quality modeling consultant in a spreadsheet matrix for each of the LTCP scenarios. • The Elkhart and Mishawaka LTCPs are appropriate representation of future CSO loads from these communities. • The year 1992 will continue to serve as the typical year. • The water quality model optimization integration tool will be developed to run in a Microsoft Windows Environment using the .Net platform and Access database. • The water quality model optimization integration tool will allow for variation in the CSO hydrographs, and the event mean concentration of E. coli in the CSO effluent. All of the other inputs are expected to remain constant in the optimization runs. South Bend LTCP Reevaluation - Phase 1C Amendment Page 6 Revised 06/29/2016