Did You Know?
The soil under the stone in the trench bottom of a properly working system can remove 99 percent of the E.coli for every 30 centimetres ?(12 inches) of unsaturated soil.
The soil under the stone in the trench bottom of a properly working system can remove 99 percent of the E.coli for every 30 centimetres ?(12 inches) of unsaturated soil.