Sludge is made up a lot of different chemicals and petroleum that is used in the plant. The basic process is to let it burn and when the sludge is almost gone, then the extinguishing occurs.  -   Steve Patterson     Quotes
Sludge is made up a lot of different chemicals and petroleum that is used in the plant. The basic process is to let it burn and when the sludge is almost gone, then the extinguishing occurs. Steve Patterson