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| Managing Soil Contamination Risks |
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| TDK instituted new environmental risk management guidelines and established a management method of mapping or visually representing reference values for assessing soil contamination risks at plant sites as well as assessment results. By introducing this management method, the order of priority in taking preventive measures against soil contamination will be identified for the effective implementation of environmental risk management. |
| Addressing Soil and Groundwater Problems |
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| Recovering contaminated soil at the former second plant of Yuri Honjo TDK Corp. |
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Since 2001, TDK has conducted soil surveys at plants and offices that were shut down due to business restructuring or relocated to another site and has put purification measures into effect for those business sites where contamination was discovered. One recovery job was completed in FY 2004, and two others are underway. |
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| Recovery of Contaminated Soil at TDK Plants in FY 2004 |
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| Plant Name |
Date of Closing or Relocation |
Surveyed Items |
Description of Survey Results |
Restoration Method |
Recovery Completion Date |
| Site of the Second Plant, Yuri Honjo TDK Corp. |
October 2004 |
Heavy metal |
The concentration of metallic arsenic exceeded the reference level in some areas of the site. |
Removal of the moat with contaminated soil. |
December 2004 |
| Site of Ichikawa Plant |
January 2004 |
Heavy metal |
The concentration of metallic arsenic exceeded the reference level in some areas of the site. |
Removal of the moat with contaminated soil. |
Recovery work in progress (to be completed in August 2005) |
| Narita Plant |
In operation |
Heavy metal |
Selenium in groundwater exceeded the reference level. |
Drilling of a purification well Drawing groundwater for purification |
Started purification in April 2005 |
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| Responding to the Asbestos Issue |
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| TDK has been investigating the use of asbestos in its existing buildings. It has confirmed thus far that asbestos is used in some of the office buildings. There is no evidence that the asbestos has been airborne, and no health disturbance has been reported. For those places where the use of asbestos was confirmed, TDK will take measures to prevent asbestos from becoming airborne and keep an eye on the buildings in question so that proper disposal will be undertaken when such buildings are dismantled. |
| TDK stores and maintains 75 electrical power capacitors and 150 fluorescent light stabilizers at its domestic sites in compliance with the Waste Disposal Law. In response to full-fledged PCB waste disposal requirements, TDK began efforts to properly dispose of PCBs. |
| TDK sets voluntary air and water quality standards that are stricter than regulatory values (less than 80% of regulatory values) and establishes emergency measures in the event those standards are exceeded. In FY 2004, there were two instances where voluntary water quality standards were exceeded at TDK's domestic sites. At present, however, there is no instance of voluntary values being exceeding thanks to our thorough measures for preventing recurrence. |
| Handling of Hazardous Substances Subject to the PRTR Law in FY 2004 |
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The TDK Environmental Action 2010 program sets a target of reducing the emissions of substances subject to the PRTR Law by 30% compared to FY 2002 levels by March 2010, and TDK is taking specific action to achieve that target.
The graph below shows the total emissions of substances subject to the PRTR Law from FY 1997 to FY 2004, and the table shows total emissions in FY 2004. In FY 2004, 446.8 tons of chemical substances were emitted, representing an 8.6% decrease from that in the previous year and a 0.9% decrease from the FY 2002 level. TDK will implement measures to further reduce emissions and achieve its target.
Note: The PRTR Law is the Law Concerning Reporting, etc. of Releases to the Environment of Specific Chemical Substances and Promoting Improvements in Their Management.
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Emission Volume of Chemical Substances Covered by the PRTR Law
(Total for all manufacturing and R&D facilities of TDK (the parent company) and its consolidated subsidiaries in Japan)
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Amounts of Chemical Substances Covered by the PRTR Law and Handled by TDK in FY 2004
(Total for all manufacturing and R&D facilities of TDK (the parent company) and its consolidated subsidiaries in Japan) |
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| Chemical substance |
Volume used |
Emission |
Volume removed |
Recycled* |
| Atmosphere |
Water for public use |
Soil |
Landfill within plant |
Waste |
Sewer |
| Linear alkyl benzene sulphonic acid and its salts (C10-C14) |
4.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
3.9 |
| Antimony and antimony compounds |
4.9 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.3 |
| Polycondensate of 4,4'-Isopropylidenediphenol and 1-chloro-2,3-epoxypropane (liquid only) |
36.9 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
1.8 |
| Ethyl benzene |
8.8 |
2.7 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
1.5 |
| Ethylene glycol |
4.1 |
1.7 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.4 |
| 1-octanol |
1.5 |
1.5 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
| Xylene |
103.6 |
35.3 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
20.4 |
| Silver and water-soluble silver compounds |
16.7 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
1.1 |
| Chrome and trivalent chrome compounds |
1.1 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.1 |
| Vanadium pentoxide |
2.1 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.1 |
| Cobalt and cobalt compounds |
238.2 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
86.6 |
| Dichloromethane |
3.7 |
1.7 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
2.0 |
| Tetrahydromethylphthalic anhydride |
20.9 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.7 |
| Water-soluble copper salts (other than complex salts) |
184.7 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
5.2 |
| 1,3,5-trimethylbenzene |
2.4 |
1.4 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.3 |
| Toluene |
1363.3 |
369.2 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
610.3 |
| Lead and lead compounds |
110.5 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
6.9 |
| Nickel |
377.6 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
20.4 |
| Nickel compounds |
270.1 |
0.0 |
0.5 |
0.0 |
0.0 |
0.0 |
0.0 |
18.6 |
| Hydrazine |
22.7 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
2.3 |
| Phenol |
4.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
3.9 |
| Di-n-butyl phthalate |
4.6 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.2 |
| Bis phthalate (2-ethyl hexyl) |
3.7 |
2.7 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
1.0 |
| n-butyl phthalate=benzyl |
50.4 |
30.1 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
6.2 |
| Boron and boron compounds |
19.3 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
1.2 |
| Manganese and manganese compounds |
2134.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
15.2 |
| Molybdenum and its compounds |
3.9 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
3.2 |
| Total |
4997.5 |
446.3 |
0.5 |
0.0 |
0.0 |
0.0 |
0.0 |
813.8 |
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| *Includes recycling for which a fee was paid, recycling for which no fee was paid, and recycling for which a fee was received |
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