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Environmental Management
Environmental Performance Data
Surveys and Measures Taken on Soil and Groundwater Contamination
| Operation Site | Substances | Progress in Fiscal 2010 |
|---|---|---|
| Tokyo Site Hino (Hino, Tokyo) | Fluorine, Boron, Mercury | The company makes periodic observations at monitoring wells located at the site boundary. After remediation of fluorine-contaminated soil was implemented, it has been confirmed that fluorine and other specified hazardous substances with a history of use are all below the limit of environmental standard values, and have no impact on the surrounding environment. With the removal of aged buildings, the company performed a survey of the soil on the site in accordance with Tokyo Metropolitan Ordinance, and identified contamination with boron and mercury at certain locations within the site. The company reported the contamination to the local government, and is planning to implement remediation by means of excavation. |
| Tokyo Site Hachioji (Hachioji, Tokyo) | Hexavalent chromium | The company continues with measures for remediation and prevention of dispersion by pumping ground water taken from wells located within the site. Through continued periodic observation of ground water, the company has confirmed that there is no runoff from the site. |
| Mikawa Site, Western Zone (Toyokawa, Aichi Prefecture) | TCE*1, Fluorine | In fiscal 2010, the company implemented excavation and removal of soil contaminated with TCE in the southeast part of the site. The company also continues with measures for remediation of ground water and has been monitoring the effects of such measures. The company has excavated and removed part of the soil contaminated with fluorine, and continues with measures to prevent dispersion of the remaining part. Through continued periodic observation of ground water, the company has confirmed that there is no runoff of TCE or fluorine from the site. |
| Itami Site (Itami, Hyogo Prefecture) | Lead, Arsenic, Cadmium, Fluorine, Boron | Regarding lead, arsenic, cadmium, and fluorine, the company has completed remediation through excavation and removal of the contaminated soil at the boundary areas within the site in fiscal 2009, and has performed observation of ground water to confirm that there is no runoff of these substances from the site. Regarding the ground water contamination with boron identified in a specific area of the site, the company continues with pumping to prevent dispersion of the contaminant, and has confirmed that there is no runoff from the site. |
| Sakai Site (Sakai, Osaka) | TCE, PCE*2, c-DCE*3, Lead, Arsenic, Cadmium | Regarding TCE, PCE, and c-DCE, the company continues with remediation through pumping and measures to prevent runoff of contaminated ground water from the site. Contamination has been confirmed at certain locations within the site for lead, arsenic, and cadmium. However, periodic observation of the ground water indicates that, in all the monitoring wells located at the site boundary, the concentrations are below the limit of environmental standard values and have no impact on the surrounding environment. With the demolition of buildings in the east block, the company performed a survey of soil in accordance with Article 4 of Japan’s Soil Contamination Countermeasures Act, and reported to the local government that there was no contamination identified within the said area. |
| Osakasayama Site (Osakasayama, Osaka) | TCE, PCE, c-DCE | In fiscal 2009, the company implemented excavation and removal of contaminated soil at one of the two locations where contamination had been identified through a survey around its effluent treatment facility. In fiscal 2010, the company implemented a detailed survey of the remaining locations, deliberated on a new construction method as a countermeasure, and then decided to implement it in the first half of fiscal 2011. |
| Site of the former Nankai Optical Co., Ltd. (Kainan, Wakayama Prefecture) | TCE, PCE, c-DCE | The company reported completion of ground water remediation through bioremediation to the local government in fiscal 2009. Henceforward, the company will implement observation through voluntary surveys. |
| Toyohashi Precision Products Co., Ltd. (Toyohashi, Aichi Prefecture) | TCE, PCE, c-DCE, Hexavalent Chromium | The company has implemented remediation of ground water through pumping, and continued periodic observation to confirm that there is no runoff of the relevant substances from the site. Levels for TCE, PCE, and c-DCE are within the environmental standard values at many monitoring wells. |
| Konica Minolta Opto Products Co., Ltd. (Fuefuki, Yamanashi Prefecture) | TCE, PCE, c-DCE | The company has implemented remediation of ground water through pumping, permeable reactive barriers, and bio-barriers, and continued periodic observation to confirm that there is no runoff of the relevant substances from the site. |
| Konica Minolta Supplies Manufacturing Co., Ltd. (Kofu, Yamanashi Prefecture) | TCE, PCE, c-DCE | The company has implemented remediation of ground water through bioremediation, and continued periodic observation to confirm that there is no runoff of the relevant substances from the site. |
- *1
- TCE: trichloroethylene
- *2
- PCE: tetrachloroethylene (perchloroethylene)
- *3
- c-DCE: cis-1,2-dichloroethylene (resolvent of TCE and PCE)