PSA - Long-Termed Control Plan Stantec Consulting Services

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Stantec Consulting Services Inc. 1 of 16 TO1 – Randolph-Sampson RTB PER Exhibit A - Engineering Services for Randolph-Sampson Retention Treatment Basin Introduction The City of South Bend (“CITY”) is implementing its combined sewer overflow (CSO) Long Term Control Plan (LTCP) under a Federal Consent Decree (effective August 2021). The CITY has requested Stantec Consulting Services Inc. (“STANTEC”) perform engineering services to implement the improvements associated with the Randolph-Sampson Retention Treatment Basin (RTB) and the CSO 022 regulator. The engineering services will include preparing a Preliminary Engineering Report (PER), preliminary and final design materials, and bidding documents. STANTEC will also provide engineering services during bidding, construction, commissioning, and start-up of the project elements. The proposed improvements in the LTCP associated with the Randolph-Sampson RTB and CSO 022 include the following project elements as described in “Table-1 CSO Control Measures Description, Design Criteria, Performance Criteria and Implementation Schedule” of Appendix A of the Consent Decree: Project Description, Design Criteria1, and Performance Criteria4 Start Date2 End Date3 Randolph-Sampson RTB and Site Piping Below grade retention treatment basin and pumping station with provisions for screening, disinfection/ dechlorination of overflow. Minimum storage volume of 4.7 million gallons. 01/2025 12/2029 Throttle Control at CSO 022 Actively controlled sluice gate on capture throttle to prevent overflows at CSO 48 near River Crossing #1 01/2025 12/2029 Regulator/Throttle Improvements Upstream of East Race Modifications to reguators/throttles at CSOs 014, 018, 021, 040 01/2025 12/2029 Randolph-Sampson RTB and Site Piping 90" diameter inlet and outlet sewers for Randolph- Sampson RTB 07/2025 12/2029 Regulator Modifications for Randolph-Sampson RTB Modification to regulator at CSO 022 02/2026 12/2029 Footnote: 1 Each measure shall be designed in accordance with the specifications in this Table-1 and shall also be designed to ensure achievement of the Performance Criteria specified below in footnote 4 to this Table-1 (including designing the equalization basin and RTBs with capacities larger than the minimum specifications, if necessary to achieve the Performance Criteria). Sections XX and XXI of the Consent Decree do not apply with respect to the descriptions and Design Criteria in this Table-1. 2 "Start Date" shall mean the date that South Bend has an engineer under contract to design the initial facility within the relevant grouping. 3"End Date" shall mean the date that construction is completed on all facilities within the relevant grouping, and they are operating as designed.