The original tank design was a monopole ellipsoid for this new tank. It is our understanding that Chatham Park proposes to use a multi-pedestal design for this new tank. This is the same design that Chatham County has incorporated at its North Chatham Elementary School and Mann’s Chapel Rd. tanks.
Another issue that this elevated tank will create is the need for individual pressure reduction valves (PRVs) for the residences in the area where pressures will increase by as much as 10 psi.
Each resident will need to install a PRV to ensure that their plumbing fixtures don’t rupture. The Town will need to send notices to each of these residences of the need to hire a plumbing contractor to install a PRV or the town will need to install them. The precedence, according to Mr. John Poteat is the residences were notified and provided a list of plumbing contractors to contact to have this done at their expense. Staff believes that the Town should plan, finance and install these PRVs as the residences did not create the need for the proposed elevated tank.
They propose the following schedule:
1) Plans, specifications and permit applications presented to the Town and NCDENR for review: December 2015
2) Begin construction: April 2016
3) Construction substantially complete: June 2017
Staff believes that the Phase 1 elevated tank design is the best approach to meet the need to improve water pressure in the north pressure zone of Pittsboro while meeting the near-term pressure and demand needs of Chatham Park.
However, staff also believes that this design should include a second automated pressure control valve in the area of the million gallon tank to allow our operators to by-pass the million gallon tank. The benefits to the town are primarily two-fold:
factor for water age and water quality issues in the southern end of town.
Mr. Royal said staff recommends that the Town Board of Commissioners approve this Phase 1 elevated water tank design and schedule to provide sufficient treated water to Chatham Park in order to meet expected needs in the near term. They also believe that this design should include a second automated pressurize control valve to ensure that the proposed elevated tank will not add to water age in the southern pressure zone.
Mayor Terry asked who pays for it, who owns and operates it and who designs the system. Mr. Royal stated those items will be addressed in the development agreement.
Commissioner Fiocco stated he thinks the Town will own and operate it and that is will designed to the Towns specifications.
After much discussion it was decided that Hydro Structure should also be involved to look at the design and how it will work with our system and that it be brought back to a later meeting.