37 disposal of waste for others; construction and maintenance of commercial, industrial, environmental, energy, waste handling and treatment and transportation facilities, equipment and systems; scaffolding services; namely, scaffolding erection, dismantlement and rental; industrial cleaning services; namely, vacuuming, drain and pipe cleaning, water and abrasive cutting, explosive cleaning and heat exchanger cleaning; marine construction services; namely, underwater pipeline and cable installation, maintenance and repair; sludge removal and dewatering; maintenance dredging; nuclear services; namely, underwater dismantlement and repair of nuclear components and fuel pool repair; installation, maintenance and repair of penetration seals; asbestos removal; insulation installation services; dismantling and demolishing of buildings and industrial plants; refractory maintenance and repair; cleaning services; namely, office cleaning and municipal street cleaning; maintenance, repair and cleaning of sewage and water lines; installation of fluid and soil containment liners and drainage materials; collection of recyclable waste; rental of portable fencing, modular buildings, mobile homes, pre-engineered steel buildings and portable toilet systems