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Soil and Underground Water Pollution countermeasures

ⅰ. Soil and Groundwater Testing  Results in Kariya Plant

In the Kariya Plant, soil and groundwater testing was carried out and it newly revealed some parts of the site exceeded control values. Toyota Industries reported to the Aichi Prefecture and made a public announcement about the results on December 22, 2015.

Based on Aichi Prefecture’s instructions, Toyota Industries takes continuous measures to clean the contamination in putting a top priority on not to make troubles to neighborhood resident.

Kariya Plant Soil Testing Results(Soil elution amount)

Item Control value*1 Maximum value Ratio to the control value Excess points/
Testing points
Volatile organic compound Trichloroethylene 0.03mg/l 1.0mg/l 33.3 times 6/51
Cis-1,2-dichloroethylene*2 0.04mg/l 0.36mg/l 9 times 7/51
Heavy metal Fluorine 0.8mg/l 16mg/l 20 times 72/299
Lead 0.01mg/l 0.038mg/l 3.8 times 1/283

Kariya Plant Soil Testing Results(Soil elution amount)

Item Control value*1 Maximum value Ratio to the control value Excess points/
Testing points
Volatile organic compound Trichloroethylene 0.03mg/l 20mg/l 667 times 13/61
1,1- dichloroethylene*2 0.1mg/l 0.36mg/l 3.6 times  3/61
Cis-1,2-dichloroethylene*2 0.04mg/l 8.1mg/l 203 times 33/61
*1
Control value : Determined by the Soil Contamination Countermeasures Act
*2
1,1- dichloroethylene, Cis-1,2-dichloroethylene : decomposition product of trichloroethylene

ⅱ. Groundwater Pollution Purification in Kariya and Kyowa Plant

Toyota Industries carries out surveys and purification of soil and groundwater contaminated from the past use of trichloroethylene. We regularly report the survey results to local government authorities and provide information at local community meetings. As measures to prevent pollution from substances covered by the Soil Contamination Countermeasures Law as well as from grease and oils, we have drilled observation wells at all plants to conduct regular checks.

Trichloroethylene Readings

Control value: 0.03, Unit: mg/liter
Plant FY2011 FY2012 FY2013 FY2014 FY2015
Kariya Less than
0.002 - 7.42
Less than
0.002 - 4.61
Less than
0.002-4.63
Less than
0.002-3.79
Less than
0.002 -3.50
Kyowa Less than
0.002-4.58
Less than
0.002-2.10
Less than
0.002 -3.35
Less than
0.002 -5.71
Less than
0.002 -2.99
*
The data is pumped ground water quality before purification. The ground water is released after depuration.
*
Maximum and minimum concentration is reported form this time, while weighted average was reported before.

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