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Kimley>>> Horn July 20, 2022 Harrison Youngblood Indian River County Department of Utility Services 4350 41 st Street Vero Beach, FL 32960 RE: Indian River County Department of Utility Services South Oslo Road Water Treatment Plant Change Order 1— Switchgear and Raw Water Blend Assembly Replacement Harrison, The intent of this letter is to outline our recommendation to Indian River County Department of Utility Services (IRCDUS) to utilize a change order for the Water Treatment Plant (WTP) Improvements project with TLC Diversified, Inc. to replace antiquated switchgear assembly and the existing raw water blend filter vessel and piping assembly at the South Oslo Road Water Treatment Plant. 1. Switchgear: The WTP receives utility power from Florida Power and Light (FPL) for operation. Incoming power enters through the existing 2,000 -Amp switchgear that is used to control, protect, and isolate electrical equipment. The switchgear can receive utility power from FPL or backup power from the 1,250kW generator via Automatic Transfer Switch (ATS), and transmit electricity to each of the respective Motor Control Centers (MCCs) that are necessary to run treatment and pumping equipment. The switchgear is a critical element of the WTP and needs to be replaced. Our team, including our electrical engineer subconsultant C&W Engineering, were aware of the upcoming need to replace the switchgear during the investigative work performed as part the ATS replacement, which began about two (2) years ago. Based on the findings, it was recommended to budget replacement. Since time has passed, the motorized breakers in the switchgear have exhibited failures and replacement is now urgent. 2. Raw water blend: The WTP utilizes raw water blend to stabilize their finished water quality. Historically, the piping has had leaks forcing Indian River County to utilize a welder to "patch" the piping to maintain operations. Most recently, the blend filter vessel failed, forcing operations to bypass the vessel altogether. These components are past their useful life and replacement is recommended. TLC Diversified, Inc., the prime contractor for the WTP Improvements project, provided a proposal to replace this equipment in the amount of $483,563.83. This includes a 15% markup on self -performed work and 5% markup subcontracted work in accordance with the project contractual documents. It is our professional opinion that this cost is fair and commensurate with the market and recommend this work be added to the WTP Improvements project as a change order to TLC. I trust this information useful. Should you need additional information or have any questions regarding this project, please do not hesitate to contact me at 561-421-1979. Sincerely, 1920 Wekiva Way, Suite 200, West Palm Beach, FL 33411