R2021-14 Resolution Authorizing a Professional Engineering Services Agreement with AECOM Technical Services, Inc. to provide design services for the Ellen and Division Inflow and Infiltration Reduction Program – Phase 2, City Project 2018-01

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extensive negotiations between the City and the US EPA resulted in the US EPA's issuance of an ACO that was greatly limited in scope compared to the initial Order. This was in large measure due to the City's ongoing commitment to improving its sanitary sewer systems, and its good faith efforts to negotiate a reasonable ACO with the US EPA. The Administrative Consent Order's major requirements included: 1. A Development of a Capacity Management, Operations, and Maintenance (CMOM) program. The CMOM program provides a comprehensive review of the City's sewer collection system asset, including system management, maintenance, and capital improvement funding. The CMOM was approved by the USEPA on May 1, 2018 and the City has implemented the program. 2. Preparation of a Sewer Collection System Alternatives Analysis (SCSAA) for areas identified as experiencing Sanitary Sewer Overflows (SSOs) and sewer back-ups during storm events. The analysis focused on efforts to keep storm water from entering into the separate sanitary sewer system and better manage stormwater entering the combined sewer system. US EPA Administrative Consent Order Status The City submitted a third revision to the required Sanitary Sewer Collection System Analysis (SCSAA) on November 30, 2017. The _ revised SCSAA identified four major areas of t, concern. m _� 1. North Lost Bridge Area ( I 2. Florian Avenue Area 3. Basin 5/6 Area(Grand/Rt.48) T"eEll.8°"a°" —r 4. Ellen/Division Area �TABFIaianAw Bash 5 BArae � The Ellen/Division Area was identified as an 1 additional thatoccurred duringarea theduring e aTA preparation of thee rainfall �.,;�� .� n � �I.ade� revised SCSAA. Rainwater induced sanitary sewer overflows persisted in the area despite increased sewer system maintenance. These persistent overflows required that an Inflow and Infiltration(I&I) study be completed, and the system be added to the list of priority areas to be addressed by the City as identified in the SCSAA. The City has not received any correspondence regarding the SCSAA from the USEPA since the November 30, 2017 revision was submitted. The table below provides the project status of each area. The Consent Order originally required that all work be completed by December 31, 2020. The final I&I reduction design for each area was put on hold until the City received USEPA approval of the SCSAA and the preliminary design studies.