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re -pump may be needed to provide fire flow in the Roseland area in the future. A new tank of this size may be upwards of $2,000,000. Option 2: Raising the tank is an option that could be performed, but would incur additional costs to elevate the tank, and includes the unknown impact to the foundation of the tank. Elevating the tank would also require it to meet the newer building codes which have more stringent wind loads, requiring foundation bolstering and additional cost. It would also require a review by the Federal Aviation Administration (FAA), who would likely require lights to be added to the elevated structure. It is also the understanding that FAA in the past has not allowed the height to be raised in the subject vicinity. The cost of raising the existing tank is comparable to a new tank. Option 3 (Recommended): Converting the tank to a storage and re -pump station that provides remote storage and re -pumping to the North Roseland service area is an option that would allow IRCDUS to reuse the asset and address future fire flow requirements. The benefits include improving water quality by frequently turning the water over, providing true fire flow protection, and maintaining use of a known asset. Additionally, the existing tank elevation would not be an issue with this option as long as there is a functioning pressure sustaining valve upstream of the tank to prevent over -filling of the tank. Currently, the existing operation of the tank is to utilize one pipe for filling and draining. Depending on system demands, the tank will fill during low system demands and drain during high demands. The proposed operation is to convert it to a re -pump facility, where it is filled through one pipe, and pumped out via separate outlet pipe as shown in Figure 2 below. The tank essentially separates the distribution system into two regions, upstream (supply) and downstream (demand). The supply region is one which supplies water to the tank and fills the tank at varying rates with a set tank inlet pressure. Filling of the tank would occur during low system demands. This region would consist of the Roseland Road (CR 505) corridor. Discharge from the tank to the downstream region would be through booster pumps which essentially increase and enhance system pressure in the general area, including the Sebastian River Medical Center and the commercial areas along US1. An emergency bypass with valve could boost pressure to both the upstream and downstream sides of the tank during fire flow conditions. The recommended option is to convert the tank to a remote "elevated" ground storage tank and booster re - pump' station. The engineer's opinion of probable cost as of March, 2017 for the conversion is estimated at $950,000.00. This includes two (2) 3,000 gpm pumps with 50 hp motors, piping, inlet control (altitude valve) on the inlet side, electrical gear and variable frequency (VFD) drives and improvements that would be housed inside the existing tank hydropillar shell, a portable or fixed generator, and a pump station controller. A bypass would be provided to boost both sides (upstream and downstream) of the tank. C:\Users\GRANIC"'1\AppData\Loca I\Temp\BCL Technologies\easyPDr 7\@ BCL@58054AA9\@ BCL@58054AA9.docx P34