42 Engineering; Research and development and testing and consultation related thereto in the fields of chemistry, chemical processes, industrial processes, mining, oil and gas production and treatment and storage, water treatment, wastewater treatment, solid waste treatment and hazardous materials management; Technical consultation in the field of environmental science, engineering services and design for others in the field of environmental engineering; Chemistry consultation; Custom design and engineering of mining and industrial chemical treatment and holding structures; Consulting services in the field of design and development of engineering processes; Consultation in the field of auxiliary design for oil and gas industrial machines; Environmental services, namely, technical consultation in the field of environmental science, engineering services and design for others in the field of environmental engineering; Consulting services in the field of industrial engineering; Technical consulting in the field of environmental engineering; Scientific consulting services relating to hazardous materials management