7 Polymer welding equipment, namely, wedge welders, extrusion welders, hot air welders and gas welders
19 Polymeric lining systems, namely, concrete protection systems for use in piping and structures, namely, precast containment structures, barriers, and floating roofs, and multi-material coupling systems all sold as a unit
42 Engineering, design, and inspection of containment structures and containment systems, namely, tanks, landfills, lagoons, and ponds