Specialized product category for groundwater contamination countermeasures at manufacturing facilities, including purification equipment, monitoring systems, and chemical injection facilities. Handles groundwater purification equipment for removing contaminants such as organic solvents, heavy metals, and oil substances, monitoring well equipment, bioremediation materials, and in-situ purification systems from groundwater contamination investigation to purification treatment within factory premises. Includes specialized equipment, chemicals, and monitoring devices necessary for groundwater standard compliance under soil contamination countermeasures law and prevention/purification of groundwater contamination by chemical substances specific to manufacturing industry, limited to direct countermeasure products for groundwater layers distinguished from surface soil measures.