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Komatsu's Environmental and Social Activities Enhancing Quality of Life


Environmental Risk Management  Management of Chemical Substances and Pollution Prevention

Reducing the amount of PRTR-related substances and VOC released

VOCs such as xylene and ethylbenzene, which are used in paint coating, account for most of Komatsu's emissions of PRTR-regulated* substances. Though reductions in emissions in FY2012 were mostly due to reductions in production, the emission output level was improved as well. We plan to further reduce VOC emissions through approaches such as, (1) shifting to high solid paint, and (2) improving paint application rate.

*PRTR:Law designed to mandate the disclosure of the amount of specific chemical substances released into the environment to promote the management of such substances (The notification system based on the PRTR Law)

Names of Class I Designated Chemical Substances and the Amounts

Released and Transferred by Group Manufacturing Facilities in Japan

(handling 1 ton or more, or 0.5 ton or more for Class I Specified Chemical Substances) (applicable PRTR substances from April 2010)

(Unit: t)
Number
under
the
PRTR
Law
Name Amount
handled
Amount released Amount
transferred
Chemically
transformed
or
eliminated
Amount
Contained
in
Products
Air Water Soil Buried Sewage Waste
412 Manganese and its compounds 560.8 1.1 - - - - 15.6 - 544.1
80 Xylene 357.4 260.5 - - - - 21.2 73.7 2.1
53 Ethylbenzene 220.1 193.4 - - - - 12.7 13.6 0.3
87 Chromium and chromium
(III) compounds
162.1 0.0 - - - - 1.7 - 160.4
300 Toluene 120.8 93.9 - - - - 18.5 6.1 2.4
438 Methylna
phthalene
102.2 4.3 - - - - - 91.6 6.2
453 Molybdenum and
its compounds
45.1 0.0 - - - - 0.0 - 45.1
448 Methylenebis (4,1
phenylene) = diisocyanate
32.2 0.0 - - - - 0.0 31.9 0.2
296 1,2,4-
trimethyl
benzene
31.8 9.2 - - - - 1.0 20.9 0.8
308 Nickel 21.5 0.0 - - - - 0.4 - 21.2
88 Chromium (VI)
compounds *1 *2
11.8 0.0 - - - - 2.9 - 0.0
321 Vanadium compounds 9.0 - - - - - - - 9.0
277 Triethylamine 9.0 1.8 - - - - 0.0 7.1 -
297 1,3,5-
trimethyl
benzene
8.2 4.0 - - - - 0.5 3.7 -
132 Cobalt and its compounds 8.1 - - - - - 1.1 - 7.0
392 n-hexane 5.8 3.4 - - - - 0.0 1.5 0.9
188 N,N-
dicyclohe
xylamine
5.0 0.3 0.0 - - - 4.2 0.2 0.1
349 Phenol *3 4.4 0.4 - - - - - 4.0 -
258 1,3,5,7-
tetraaza
tricyclo[3,
3,1,1(3,7)] decane *3
4.2 - - - - - - 4.1 0.1
405 Boron
compounds
3.3 - - - - - 2.1 1.2 0.1
207 2,6-Di-tert-butyl-4-
methylphenol
3.0 1.0 0.0 - - - 0.4 0.0 1.5
302 Naphthalene 2.8 1.3 - - - 0.0 0.3 1.1 -
71 Ferric
chloride
2.4 - - - - - 2.4 - -
1 Zinc compounds
(water- soluble)
1.0 - - - - - 0.0 - 1.0
*1: During chrome plating, chromium (VI) compounds become chromium compounds. Therefore, the amount transferred and the amount contained in products are entered as chromium and chromium(III) compounds.
*2: PRTR Class I Specified Chemical Substances
*3: Although the amount contained is below the amount that requires registration with the PRTR, we report the data because the amount released exceeds one ton.

Breakdown of the Amount of PRTR-related Substances Released and

Transferred at Komatsu Group Manufacturing Facilities in Japan

Breakdown of the Amount of PRTR-related Substances Released and Transferred at Komatsu Group Manufacturing Facilities in Japan

Changes in the Amounts of PRTR-related Substances Released*

at Group Manufacturing Facilities in Japan

Changes in the Amounts of PRTR-related Substances Released* at Group Manufacturing Facilities in Japan

Amount of VOC Released by Group Manufacturing Facilities in Japan

Amount of VOC Released by Group Manufacturing Facilities in Japan