Waste Water Engineering
The asbestos cement sewers are

Not structurally strong to bear large compressive stress
Susceptible to corrosion by sulphuric acid
Light in weight
All of these

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Waste Water Engineering
In septic tanks,

The clear space between the baffle top and covering slab is about 7.5 cm
Free board of 0.3 m may be provided
The baffles or tees are extended up to top level of scum
All listed here

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