Standard size of Septic Tank

[angelo]

How to determine size of septic tank, gaano kalalim? We are planning some extension to the house and madadali ung maliit (i don't know the size) naming septic tank, kaya kelangan ilipat.

We are 5-6 members of the family. Please quote. Thanks.

[cyberchrono]

try mo tignan sa libro na plumbing design...meron kcing computation ng fixture units doon tpos makukuha mo na yung size ng septic tank