Frequent overflow of septic tank / soak pits in an apartment : Please suggest remedies


We are the occupants of a 14 member flatwherein we have one main septic tank and 3 nos of soak pits.
The sizes are respectively: -

septic tank: 12ftx12ftx12ft (approximate dimensions),

Soak Pits: 4ft dia x 12ft ht - 2 nos. 3ft dia x 12ft - 1 no. (for bathroom & washing machine waste water).

We find the soak pits overflowing frequently and needs removal of waste water by 4 to 5 lorries atleast every 2 months.

What would an ideal remedy be for the situation ?

The ground floor is car park only. and the ground level is 4 to 5 ft from the road level

Thanking you,

R RAGHAVAN

+91 8056190546

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