- If the sludge is contaminated with the chemical. This is a waste of the healing process. Was taken to rid the wrong way. It can harm the ecosystem of life both in water and on land.
-If there is a sludge contamination of chemicals, which is a waste treatment process to get rid of it how can harm the ecology of creatures both in water and on land.
- If the sludge is also the contamination of chemicals which is free from the treatment process is used to remove a method is not to be a danger to the house as a result of both in the water and on land