Mercury Contamination at a Former Factory Site in Hachioji City - June 1998

Mercury Contamination at a Former Factory Site in Hachioji City - June 1998

At the site of the former Hachioji plant of Nippon Vailea Agrochem in Hachioji City, Tokyo (approx. 25,000 sq.m.),
The soil was found to be severely contaminated by inorganic mercury. According to the investigation, the contaminated soil amounted to approximately 60,000 cubic meters,
The leakage of mercury during the wastewater treatment process is believed to be the cause. The plant manufactures agricultural chemicals,
It is highly possible that proper treatment was not carried out. Mercury contamination is known to cause neurological disorders,
Mercury contamination is known to cause neurological disorders and is of particular concern as the causative agent of Minamata disease.

Although the specific concentration of mercury and the amount of mercury contained per kilogram of soil have not been disclosed,
According to the Ministry of the Environment's standards, special controls are required if the mercury concentration in the soil exceeds 0.5 mg/kg.
There is widespread concern among residents about long-term health risks, including neurological and renal dysfunction.

The company has begun the cleanup process, which is expected to be completed by January 2000,
However, the company has been criticized for its lack of transparency and disclosure of information. The city and the Ministry of the Environment are considering holding explanatory meetings for residents and
and continuous environmental monitoring. To prevent health hazards,
Immediate action and medical support for local residents are also required to prevent health hazards.