What happens to sludge in a septic tank?
it dries out and form clumps that have to be shoveled out every few years
it floats on top of the liquid wastewater in the tank and needs to be pumped out every few years
it collects at the bottom of the tank and needs to be pumped out every few years
it flows through pipes in the septic tank to the drain field
(C) it collects at the bottom of the tank and needs to be pumped out every few years
Explanation:
