R2021-114 Resolution Authorizing a Professional Engineering Services Agreement with AECOM Technical Services, Inc. to Provide Preliminary Design Services for the Oakland and Grand Area Sewer Separation Study, City Project 2021-01

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6/17/2021 Item Coversheet Public Works DATE: 6/10/2021 MEMO: 2021-62 TO: Honorable Mayor Moore Wolfe and City Council Members FROM: Scot Wrighton,City Manager Matt Newell,P.E.,Public Works Director SUBJECT: Resolution Authorizing a Professional Engineering Services Agreement with AECOM Technical Services,Inc. to provide preliminary design services for the Oakland and Grand Area Sewer Separation Study,City Project 2021-01. SUMMARY RECOMMENDATION: It is recommended that the City Council approve the attached Resolution authorizing the Mayor to sign,and the City Clerk to attest,to a Professional Engineering Services Agreement between the City of Decatur and AECOM Technical Services,Inc. (AECOM)to provide preliminary design services for the Oakland and Grand Area Sewer Separation Study,for a total fee not to exceed$199,146.00. SANITARY SEWER PRIORITIES: Under the direction of the City Council,the Public Works Department has established four priorities to improve the City's sanitary sewer collection system as defined in the Sanitary Sewer Master Plan. 1. Critical Large Diameter Sewer Rehabilitation. 2. Sanitary Sewer Overflows Due to Inflow and Infiltration. 3. System Operation and Maintenance 4. Small Diameter Sewer Rehabilitation The Professional Engineering Services Agreement with AECOM will address sanitary sewer priorities 2,3,and 4. BACKGROUND: Administrative Consent Order In 2012,the United States Environmental Protection Agency(US EPA)served Decatur with an Administrative Consent Order (ACO),requiring the City to eliminate overflows and reduce basement backups. The City retained outside legal counsel with expertise and direct experience in US EPA administration of the Clean Water Act. With the assistance of outside counsel and AECOM,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 includes: 1. The development of a Capacity Management,Operations,and Maintenance(CMOM)program. The CMOM program provides a comprehensive review of the City's sewer collection system,including system management,maintenance,and capital improvement funding. The City's CMOM program was approved by the USEPA on May 1,2018 and has been implemented as required by the ACO. 2. The preparation of a Sewer Collection System Alternatives Analysis(SCSAA)for areas identified to be experiencing Sanitary Sewer Overflows(SSOs)and sewer back-ups during storm events. This analysis is focused on keeping storm water from entering into the separate sanitary sewer system and to better manage stormwater entering the combined sewer system. US EPA Administrative Consent Order Status The current version of the City's Sanitary Sewer Collection System Analysis(SCSAA)identified four top priority areas of the City experiencing high inflow and infiltration during storm events. It should be noted that these are not the only areas in the City with high rain induced sewer problems,but these are the highest priority areas: 1.North Lost Bridge Area hfps://decatur.novusagenda.com/AgendaWeb/CoverSheet.aspx?ItemID=3454 1/3