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Chemical Management in Production Activities |
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As one of the action items regarding chemical substances used in production activities, the Hitachi Cable Group
targets and takes the initiative to reduce emissions of VOC substances from domestic production sites by 33%
in FY2011 when compared with that of FY2001. The Group also continues to grasp and monitor the handling,
released and transferred amounts of all the chemical substances purchased and maintains a database to promptly
respond to new domestic and international chemical substance regulations and a framework to prevent leakage and
other environmental pollution by comprehending variations of use by substance, reducing the risks posed by the
use of chemical substances.
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Chemicals emission control |
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The total amount of chemicals handled in FY2009 was
5,344 tons subject to the PRTR Law, with 91 tons of emitted
chemicals and 151 tons of displaced chemicals. Though the
amount handled increased when compared with that of the
previous year, the amount emitted decreased. This is thanks
to a reduced handling of toluene, xylene and other VOCs
whose amount of emissions was large, though the handling
amount of phthalic acids whose emissions were small
increased. |
Released and transferred amount of chemicals subject to the PRTR Law in FY2009
| Substance
number |
Designated chemical
substance name |
Emission amount |
Displaced amount |
| Air |
Water |
Sewage |
Waste |
| 9 |
Adipic acid bis
(2-ethylhexl) |
0.0 |
0.0 |
0.0 |
7.2 |
| 25 |
Antimony and its compounds |
0.0 |
0.0 |
0.0 |
4.2 |
| 29 |
4,4'-isopropylidenediphenol
[bisphenol A] |
0.0 |
0.0 |
0.0 |
0.0 |
| 30 |
Condensation polymer of
4,4'-isopropylidenediphenol
and 1-chloro-2,3-epoxypropane
[bisphenol A epoxy
resin] |
0.0 |
0.0 |
0.0 |
33.5 |
| 32 |
2-imidazolidinethione |
0.0 |
0.0 |
0.0 |
0.3 |
| 40 |
Ethylbenzene |
9.1 |
0.0 |
0.0 |
6.9 |
| 43 |
Ethylene glycol |
0.2 |
2.0 |
0.0 |
0.6 |
| 63 |
Xylene |
24.5 |
0.0 |
0.0 |
14.4 |
| 64 |
Silver and
its soluble compounds |
0.0 |
0.0 |
0.0 |
0.0 |
| 67 |
Cresol 1.4 |
1.2 |
0.0 |
0.0 |
5.0 |
| 108 |
Non-organic cyanide
compound (excluding complex
salt and cyanate) |
0.0 |
0.0 |
0.0 |
0.0 |
| 115 |
N- N-Cyclohexyl-2-
benzothiazolesulfenamide |
0.0 |
0.0 |
0.0 |
0.2 |
| 120 |
3,3'-Dichloro-4,4'-
diaminodiphenylmethane |
0.0 |
0.0 |
0.0 |
0.4 |
| 172 |
N,N-dimethylformamide |
5.6 |
0.0 |
0.0 |
27.7 |
| 181 |
Thio uric acid |
0.0 |
0.0 |
0.0 |
2.9 |
| 202 |
Tetrahydromethylphthalic
anhydride |
0.0 |
0.0 |
0.0 |
0.0 |
| 204 |
Tetramethylthiuram disulfide |
0.0 |
0.0 |
0.0 |
0.1 |
| 207 |
Copper soluble acid
(excluding complex salt) |
0.0 |
0.0 |
0.0 |
1.3 |
| 224 |
1,3,5-trimethyl benzene |
0.7 |
0.0 |
0.0 |
0.1 |
| 227 |
Toluene |
46.2 |
0.0 |
0.0 |
3.3 |
| 230 |
Lead and its compounds |
0.0 |
0.0 |
0.0 |
1.9 |
| 231 |
Nickel |
0.0 |
0.0 |
0.0 |
0.3 |
| 232 |
Nickel compounds |
0.0 |
0.0 |
0.0 |
0.4 |
| 252 |
Arsenic and its non-organic
compounds |
0.0 |
0.0 |
0.0 |
4.7 |
| 266 |
Phenol |
1.6 |
0.0 |
0.0 |
16.6 |
| 269 |
Phthalic Acid Di-n-octyl |
0.0 |
0.0 |
0.0 |
0.9 |
| 270 |
Phthalic Acid Di-n-butyl |
0.0 |
0.0 |
0.0 |
0.0 |
| 272 |
Phthalic acid bis (2-ethyl hexl) |
0.0 |
0.0 |
0.0 |
11.1 |
| 283 |
Hydrogen fluoride and its
soluble salt |
0.0 |
0.0 |
0.5 |
3.1 |
| 304 |
Boron and its compounds |
0.0 |
0.0 |
0.1 |
0.7 |
| 312 |
Phthalic anhydride |
0.0 |
0.0 |
0.0 |
0.0 |
| Other 63 substances |
0.3 |
0.0 |
0.0 |
2.7 |
| Total |
89.4 |
2.0 |
0.6 |
150.1 |
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*Chemicals whose names are given are those chemicals whose handling amount is 1 ton or more (0.5 ton or more for first-class designated chemicals.)
*Figures dropping the second decimal digit are indicated so the total figure is different.
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Reducing VOC air emissions |
In relation to VOC emissions in the air, that are assumed
to be a cause of photochemical oxidants and suspended
particulate matters, the Hitachi Group picks up 41
substances and takes the initiative to reduce VOC emissions
of these 41 VOC substances by 33% in FY2010 when
compared with that of FY2001.
The number of VOC substances dealt with in FY2008
was 18, and VOC air emissions with a handling amount of
1 ton per year or more was 514 tons, and we were able to
reduce VOC air emissions by the significant amount of 29%
compared with FY2001. The main reason for this was that
the adsorption collector of n-decane contained in copper
surface cleaning agents started operations, reducing
the amount of emissions. A decrease in production also
contributed to the reduction of emissions. For other VOC
with a large amount of emissions, isopropyl alcohol used
for copper surface reduction treatment, we are now working
on technical studies to reduce the amount of emissions
by transferring the work to another manufacturing facility,
which is expected to drastically reduce the amount of usage.
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Reducing VOC by adsorption collector |
Adsorption collector
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The Tsuchiura Works uses cleaning fluid for the finish
cleaning of copper products requiring a high level of surface
cleanness. The cleaning fluid contains a VOC, n-decane,
a large amount of which is emitted into the atmosphere
during the drying process, accounting for more than
40% of total emissions by the Hitachi Cable Group, which
poses a challenge to the reduction of emissions. As a
countermeasure, we have installed equipment to adsorb
volatilized n-decane to active carbon fibers for collection
and recycling, reducing emissions by 60%. Furthermore,
the collection and reuse contributed to consumption and
purchase amounts of cleaning fluid, reducing costs. |
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Storage status of electric equipment using PCB |
The processing of rendering harmless electric equipment
using PCB stored in individual works will start in FY2010
at the Hokkaido Facility of the Japan Environmental Safety
Corporation. A first priority is given to safety in carrying-out
and transportation of equipment, and we continue to strictly
store and manage equipment before carrying-out small
devices not subject to immediate processing.
| Site |
Transformer |
Capacitor |
Others (fluorescent lamp stabilizers, etc.) |
| Densen Works, Hitachi Cable, Ltd. |
0 |
15 |
Stabilizer: 391 pieces, waste oil: 54 liters |
| Hitaka Works |
0 |
46 |
Stabilizer: 32 pieces Fluorescent capacitors: 2,327 pieces, cotton waste: 13
cans + 2 bags |
| Toyoura Works |
0 |
64 |
Stabilizer: 21 pieces Fluorescent capacitors: 655 pieces, cotton waste: 5
packs, waste oil: 50kg |
| Tsuchiura Works |
1 |
365 |
Stabilizer: 573 pieces, waste oil: 4 cans, cotton waste: 3 cans |
| Equipment Factory, Hitachi Cable MEC-Tech, Ltd. |
0 |
0 |
Stabilizer: 185 pieces |
| Kisai Factory, Hitachi Alloy, Ltd. |
0 |
135 |
Stabilizer: 24 pieces |
| Ishioka Works, Tonichi Kyosan Cable, Ltd. |
0 |
6 |
0 |
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| *1 | Storage amount as of March 31, 2009. |
| *2 | In addition to those shown on the table, there are 17 capacitors in use. |
| *3 | In addition to those shown on the table, there are 32 transformers of which 11 are in use. |
| *4 | There are 9 other capacitors in storage in combinations of minute amounts of PCB. |
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