There are several maintenance program to ensure that the sanitary sewer system continues to operate effectively and efficiently.
a. Grid Program:
All the sanitary sewers are flushed with a very powerful water jet nozzle at least once every three or four years.
b. Trouble spots :
The spots of the sewage system system that have proven to be susceptible to accumulation of debris. These location are visited on a three or six month cycle to be flushed.
Grease Spots are parts of the system which can restrict the capacity of swear. They are maintained on a three or six months cycle. A grease emulsifier is applied to flush the lines.
d. Roof Control:
Some sewer mains are susceptible to invasions of roofs from vegetation which can diminish the structural integrity and inhibit the flow capacity of pipe. Pipes are routed annually with a mechanical saw flushed and applied with a herbicidal from treatment.
e. TV inspection
Take two TV inspection trucks containing remote control carriage mounted and also contains video camera that can be inserted into a swear man hole and dispatched up a sanitary swear. TV inspecting trucks generate video recordings which is used to locate cracks, dislodged pipe, units, flow conditions and any other sewer characteristics
The swear main relining program is an annual capital improvement program (CIP) performed by outside contractors and managed by WSS. The CIP funds the relining program to replace approximately 1.5% sewer system annually or about sever miles of pipes.
g. Manhole Rehabilitation:
The common methods for manhole rehabilitation are replacing the frame and cover spraying cementious mortar to the inside of manhole or spraying an epoxy linear to the inside of manhole.