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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

The number of substances covered by PRTR* with a handling volume of 1 ton or more (0.5 ton or more for Class I specified) in FY2015 was 25 with an increase of 2 substances over the previous year. The handling volume (1 ton or more) has been reduced about 18% from the previous year.

Among all PRTR-listed substances, the three substances of xylene, ethyl benzene and toluene account for approximately 93% of the emissions from Komatsu and Komatsu Group manufacturing facilities. Most of the emissions are released into the atmosphere.

At domestic Komatsu group production facilities, initiatives, such as switching to paints with a lower proportion of PRTR-listed substances, using high-solid paints, improving coating efficiency and reducing film thickness, are being undertaken for the continuous reduction of handling volumes. Also, substances handled in large volumes are being changed to secondary materials that contain chemical substances having less impact on the human body. The amount of emissions in FY2015 has been reduced by about 17% from the previous year.

*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)

Reducing the amount of VOC released

Komatsu Cabtec Co., Ltd.ís New Painting Line

Komatsu Cabtec Co., Ltd.ís New Painting Line

The majority of VOC emissions are from VOC contained in paint such as Ethylbenzene and Xylene.

The amount of emissions in FY2015 has been reduced by about 18% from the previous year by switching to paints having a less content of volatile matter, migrating to paints having a higher coating efficiency and so on.

Further improvement efforts continue in pursuit of further reductions.

Names of Class I Designated Chemical Substances and the Amounts

Released and Transferred from Komatsu 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 319.3 0.5 0.0 - - - 7.5 - 311.3
80 Xylene 231.9 170.4 - - - - 18.4 42.6 0.5
53 Ethylbenzene 155.4 126.5 - - - - 12.9 15.6 0.4
87 Chromium and chromium
(III) compounds
102.2 0.0 - - - - 1.0 - 101.2
438 Methylna
phthalene
96.5 0.5 - - - - - 96.0 -
300 Toluene 76.4 60.1 - - - - 10.2 6.1 -
296 1,2,4-
trimethyl
benzene
55.6 18.7 - - - - 1.9 35.0 0.1
453 Molybdenum and
its compounds
30.7 - - - - - 0.0 - 30.6
448 Methylenebis (4,1
phenylene) = diisocyanate
23.1 - - - - - 0.0 22.5 0.5
308 Nickel 14.2 0.0 - - - - 0.0 - 14.2
297 1,3,5-
trimethyl
benzene
8.7 4.1 - - - - 0.5 4.1 -
88 Chromium (VI)
compounds *1 *2
8.5 0.0 - - - - 2.1 - 0.0
321 Vanadium compounds 8.1 - - - - - 0.0 - 8.1
207 2,6-Di-tert-butyl-4-
methylphenol
7.8 - 0.0 - - - 0.7 0.0 7.0
132 Cobalt and its compounds 6.1 0.0 - - - - 0.8 - 5.4
277 Triethylamine 6.0 1.2 - - - - 0.0 4.8 -
460 Tricresyl phosphate 3.3 0.0 - - - - 0.0 - 3.3
188 N,N-
dicyclohe
xylamine
3.2 0.3 0.0 - - - 2.6 0.2 0.1
258 1,3,5,7-
tetraaza
tricyclo[3,
3,1,1(3,7)] decane *3
3.1 - - - - - 0.0 1.6 1.6
349 Phenol *3 3.1 0.0 - - - - 0.0 3.1 0.0
392 n-hexane 2.4 1.0 - - - - 0.0 1.4 -
302 Naphthalene 2.2 1.0 - - - - 0.5 0.7 -
83 Isopropyl
benzene
2.0 1.4 - - - - 0.1 0.4 -
71 Ferric chloride 1.2 0.0 - - - - 1.2 - -
1 Zinc compounds
(water- soluble)
1.1 0.0 - - - - 0.3 - 0.8
*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 from Komatsu Group Manufacturing Facilities in Japan

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

Amount of PRTR-related Substances Released

from Komatsu Group Manufacturing Facilities in Japan

Amount of PRTR-related Substances Released from Komatsu Group Manufacturing Facilities in Japan

Amount of VOC Released from Komatsu Group

Manufacturing Facilities in Japan

Amount of VOC Released from Komatsu Group Manufacturing Facilities in Japan