Plumbing contractor services; Plumbing services; Drain cleaning and sewer cleaning services; Maintenance of plumbing installations; Electrical repairs and installation of heating and air conditioning apparatus; Heating contractor services; Installation, repair and maintenance of heating equipment; Maintenance and repair of heating installations; Pump repairing and installation; Air conditioning contractor services; Installation and repair of air conditioning apparatus; Repair and maintenance of air conditioning apparatus for residential, commercial and industrial purposes; Repair and maintenance of gas water heaters; Repair and maintenance of water pollution control equipment; Repair and maintenance of water purifying apparatus; Water well boring; Water well drilling; Boiler cleaning and repair; Repair and maintenance of boilers; Electrical contracting; Facility maintenance services, namely, maintenance of mechanical systems and mechanical systems, namely, HVAC systems; lighting and electrical services, namely, repair or maintenance of electrical lighting apparatus; General construction contracting; construction management services; roofing services; below-grade waterproofing services, namely, basement waterproofing; construction management; general contractor services, namely, plumbing, heating and air conditioning, carpentry, drywall, painting, electrical, building and framing contractor services; Contractor services, namely, review of and remedial recommendations for building plumbing, electrical and mechanical systems for others