As used herein, the term phosphorus containing material is intended, for example, to cover {TAIL ~ both the pyrophoric sludge} and substantially solid elemental phosphorus containing products described before as well as {HEAD ~ the metal structure} of storage tanks contaminated with elemental phosphorus from either sludge or solid waste held therein 
As used herein , the term phosphorus containing material is intended , for example , to cover { TAIL ~ both the pyrophoric sludge } and substantially solid elemental phosphorus containing products described before as well as { HEAD ~ the metal structure } of storage tanks contaminated with elemental phosphorus from either sludge or solid waste held therein
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