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Reducing the Volume of Substances Subject
to PRTR
Toyota uses a total of 18,000 tons of 30 substances
that are subject to PRTR, with toluene and xylene —found in thinners
used as purge solvents in painting processes— accounting for 77% of the
total volume, most of which is discharged into the atmosphere.
Toyota is promoting a reduction in usage of substances subject to PRTR, which
discharge large volumes of hazardous substances, and a switch to less hazardous
substances not subject to PRTR. Specifically, Toyota is continuing to implement
a change to purge solvents that substitute toluene and xylene with other less
hazardous substances. As a result of meticulous daily management to ensure the
recovery of purge solvents and systematic introduction of water borne paints,1
Toyota has managed to reduce the usage volume. In FY2002, the total discharge
volume was 3,600 tons, thereby achieving the goal.
1. Water borne paints: Paints
that contain almost no organic solvents
See
details on the material
balance of substances subject to PRTR |
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•Trend in Discharge Volumes of Substances
Subject to PRTR
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•Breakdown of Materials Subject to PRTR
Discharged
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| Reducing VOC Emissions |
Organic
thinners found in paint solvents used in automobile painting
processes account for the majority of VOCs (Volatile Organic
Compounds) generated. Since 1999, Toyota has been gradually
introducing water borne paints as an effective means of reducing
VOC emissions.
In FY2002, in conjunction with the installation of new equipment
on Painting Line 1 of the Tahara Plant, Toyota introduced water
borne paints for the primer coat in addition to those already
in use for the top coating (base coat), reducing VOC emissions
to 19g/m2.
In addition, as a result of promoting measures for improving
the recovery rate of purge solvents, average VOC emissions on
all body painting lines were reduced to 44g/m2, thereby achieving
the goal. |
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•Paint Film Structure
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•Trend in VOC Emissions Volume
(Average of All Lines)

*The tabulation method has been changed from a 3-month average base to the average for a year. |
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•Breakdown of the Volume of
Waste Generated in FY2002
(Excluding that Recycled)
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