1 of 2 OVERVIEW The City of Delaware's Water Treatment Plant (WTP) started operating in 1889. The plant's raw water source is a blend of surface water from the Olentangy River and groundwater from a limestone aquifer. Under the EPA's Long Term 2 Enhanced Surface Water Treatment Rule (LT2), the WTP's feed water is classified as Bin 2, which requires a 4-log removal of Cryptosporidium. As a result, the City would convert its 6.0 MGD lime softening plant to a 7.2 MGD membrane treatment facility utilizing a 4.5 MGD ultrafiltration (UF) system to comply with LT2. A total of seven proposals were received during the bidding phase of the UF system, which was narrowed down to three based on best projected capital and operating costs and membrane performance. The three selections would b

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