The digested sludge from septic tanks, is removed after a maximum period of« Back to Previous Page

A. 3 years B. 3.5 years C. 4 years D. 5 years.
Posted by Civil Engineer
Asked on August 17, 2016 11:45 am
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A. 3 years

Posted by Civil Engineer
Answered on August 17, 2016 11:46 am