Water quality control services; Civil engineering relating to water and wastewater; Engineering services for the construction of water treatment and purification plants, solid waste treatment plants and other municipal infrastructure facilities

Waste water treatment tanks

Waste water treatment tanks; Water treatment apparatus, namely, clarification and thickening machines for use in treatment of liquids in the nature of water, waste water and industrial water

Waste water treatment tanks; Water treatment apparatus, namely, clarification and thickening machines for use in treatment of liquids in the nature of water, waste water and industrial water