Waste Water Engineering
The effluent of a septic tank is

As good as that from a complete treatment
Foul and contains dissolved and suspended solids
None of these
Fit for discharge into any open drain

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Waste Water Engineering
In septic tanks,

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

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