Environmental remediation services, namely, treatment of soil, groundwater, sediment and waste; Construction of civil engineering structures; Specialty construction services, namely, environmental, heavy civil, marine and geotechnical construction; Construction services, namely, concrete paving, site clearing, excavation, pad preparation, grading and asphalt paving services; Dismantlement and decommissioning of industrial facilities, manufacturing facilities, power-generation facilities, petroleum storage and distribution facilities, tanks and related infrastructure; Excavation services for the decontamination of subsurface soil sites; Installation and setup of soil-vapor extraction, methane mitigation and vapor-mitigation systems at commercial and industrial sites, including brownfield redevelopment sites