Abstract: A movable shelving unit for moving over ground surfaces in two different modes of operation consisting of a shelving unit and a movable base. The movable base includes a first set of wheels and a second set of wheels, each set of wheels having a first position wherein none of the wheels comprising the wheelset contacts a ground surface and a second position wherein each of the wheels comprising the respective wheelset contacts the ground surface. The movable base also contains a mode selector for moving the various wheelsets between the first and second positions. A brake mechanism is included to reduce movement of a wheelset. The shelving unit can be collapsible to allow for easier transportation and storage. The first wheelset is for moving the shelving unit over rough ground surfaces and the second wheelset is for smooth ground surfaces.

Abstract: A reusable, catch basin filter installable by one person into a catch basin. A blank of filter material is foldable to form a skirt with a central opening and having the shape of a flattened tube. A filter trap filter depends from the skirt. The hollow interior of the trap communicates with the central opening of the skirt. A flat, wire insert inserts into the skirt through an open, first end of the skirt. When installed in a catch basin, the wire insert prevents the filter from slumping as material accumulates within the filter trap. Upstanding fabric loops permit lifting a full or partially full filter out of a catch basin by carry poles or the forks of a fork lift truck inserted through the loops. After removing retained matter from the filter and cleaning the filter trap, the filter is ready for reuse.

Abstract: A reusable, catch basin filter installable by one person into a catch basin. A blank of filter material is foldable to form a skirt with a central opening and having the shape of a flattened tube. A filter trap filter depends from the skirt. The hollow interior of the trap communicates with the central opening of the skirt. A flat, wire insert inserts into the skirt through an open, first end of the skirt. When installed in a catch basin, the wire insert prevents the filter from slumping as material accumulates within the filter trap. Upstanding fabric loops permit lifting a full or partially full filter out of a catch basin by carry poles or the forks of a fork lift truck inserted through the loops. After removing retained matter from the filter and cleaning the filter trap, the filter is ready for reuse.