(a) Wet well and valve vault.
(1) Test wet well for water-tightness. Perform water-tightness test in the presence of the city.
(2) Water-tightness test shall be in accordance with ACI 350.IR/AWWA 400 “Testing Reinforced Concrete Structures for Water-Tightness.” Plug influent line and fill wet well with water to six inches below the force main pipe. Allow water to sit for 24 hours to allow for absorption by the concrete. There shall be no loss of water over a 24-hour period. If the water level has dropped the test may be run again at the contractor's option. If the test fails a second time, the interior of the wet well shall be coated with water proofing compound and the wet well retested.
(3) Vacuum test may be used upon approval of the city. Test shall meet the requirement for manhole testing as indicated in § 55-3-56 Manholes of this chapter.
(4) Submit record of test signed by the contractor.
(b) Pump operations.
(1) A Certified Performance Test shall be performed on each pump at the factory before delivery to the site.
(2) Provide the services of manufacturer's representative to check the pump station installation, supervise initial start up, and instruct the city's personnel in proper operation and maintenance of the pumps and appurtenances. A minimum of two separate trips to the site will be required, each consisting of a minimum of one 8- hour working day. Regardless of the time spent at the site, services will not be considered complete until the pump station operates as intended for a minimum of one week of operation.
(3) Operate pump station under actual field service to demonstrate that the all equipment performs to the specified criteria flow capacity and head conditions. During the field test, make adjustments as necessary for proper operation. Adjust impeller size as necessary to meet field conditions.
(4) Manufacturer's recommended start up tests shall be performed according to the installation schedule. Start up tests shall include the following as a minimum:
a. Data for each pump under operating conditions:
1. Amperage reading.
2. Pressure head reading.
3. Drawdown flow test.
b. Pull out each pump and reinstall using guide rails and hoist.
c. Test alarm condition for high flow.
d. Test auxiliary contacts.
e. Test float control system.
(5) Submit copy of tests and checks performed in the field, complete with recordings, where applicable, to the city.
(Ord. of 11-7-16, No. 10-16)