Chemical engineering services; consulting in the field of anaerobic digesters; consulting in the field of the treatment of residential, agricultural, industrial, mining, and oil and gas waste water; consulting in the field of water treatment; engineering services for the construction of water treatment facilities; engineering services for the construction of facilities for the treatment of residential, agricultural, industrial, mining, and oil and gas waste water; technical quality monitoring services of water conditions of water treatment facilities; technical quality monitoring services of facilities for the treatment of residential, agricultural, industrial, mining, and oil and gas waste water; water quality control services; scientific and technological services, namely, research, analysis, development, testing, design in the fields of waste water treatment, water treatment, and clean tech