Soil contamination and its remediation at the former site of the NTT Ibaraki R&D Center
A soil survey conducted between January and March 2007 at the former site of our NTT Ibaraki R&D Center (Naka County, Ibaraki Prefecture) found soil contamination levels exceeding permitted levels for arsenic, fluorine, lead, and hexavalent chromium. Remediation work started in October of the same year on areas where contamination was detected, and in approximately four months' time the contaminated soil was removed and site remediated in accordance with the Ibaraki Prefecture Ordinance on the Protection of Local Living Environments. Also, in order to determine the effect on surrounding areas, soil and groundwater samples were tested from neighboring sites, and all samples were found to be within permitted levels.
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Addressing asbestos issues
The NTT Group has been promoting the removal of asbestos — especially sprayed asbestos — at NTT facilities since 1985 in response to growing social concern about asbestos-related health issues. Following the enactment in 2006 of the Supplementary Provisions to the Ordinance on Prevention of Health Impairment due to Asbestos, we carried out a new survey in fiscal 2008 that revealed the existence of materials containing asbestos in some NTT facilities, and took appropriate measures as stipulated by law.
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Establishment of three principles for the appropriate handling of chemicals
The NTT Science and Core Technology Laboratory Group has established three principles for handling chemical substances: (1) preferential use of chemicals with minimum impact on the environment, (2) use only of necessary chemicals, and (3) use of no more than minimum required amounts.
NTT appropriately manages and disposes of chemical substances according to these principles.
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