System to gather particulate matter in sandblasting work

A system for gathering particulate matter used in sandblasting a storage tank having a floating roof comprising four distinct, independent sub-systems environmentally integrated to collect particulate matter subsequent to sandblasting,

• a first sub-system for operating against an outer side of a tank wall, a second sub-system for operating against an inner side of said tank wall above said roof, a third sub-system for operating against an outer surface of said roof and a fourth sub-system for operating in all regions within the tank below said roof;
• said first sub-system comprising a containing tower assembled adjacent said tank and including pipe scaffolding supported on a ground surface adjacent the tank, extending above tank bracing at a top of the tank and extending down the inner tank wall, said containing tower including a plurality of blowers spaced apart on said containing tower and connected to a plurality of conduits respectively, one of said conduits extending downwardly inside said inner tank wall through a gap between said roof and said inner tank wall;
• said second sub-system comprising a mobile containing chamber, means for raising and lowering said containing chamber in close proximity to said inner tank wall and a conduit connected to said mobile containing chamber and extending downwardly through a gap between said roof and said inner tank wall into an interior portion of said tank;
• said third sub-system comprising a moving holding chamber, a conduit connected to said moving holding chamber and extending downwardly through a gap between said roof and said inner wall and
• said fourth sub-system being comprised of an inner surface of said roof and said inner side walls below said roof.