Safety Evaluation Table of Domestic Production Bases

Safety evaluation of substances subject to PRTR

How to approach the “Degree of Safety Evaluation”

While the PRTR Law requires reports of discharge amounts of chemical substances into the environment, the impact of chemical substances on the environment largely depends not only on the discharge amount but also on the degree of hazardousness. Therefore, it is necessary to take action based on comprehensive evaluation to reduce the risk that chemical substances pose to the environment, considering both the discharge amount and the hazardousness.
Accordingly, since 2010, with reference to the “Guidelines for Evaluation of Degree of Impact on Safety by Chemical Substances” issued by Kanagawa Prefecture, we have calculated the “translation discharge amount” obtained by multiplying the “discharge amount” of the individual substances to be reported under the PRTR Law by the “toxic coefficient” depending on the hazardousness published by Kanagawa Prefecture, and we have calculated the total discharge amount by adding them together. Then, we ranked the degree of impact on “human health” and on the “ecological system.” We clarified the direction of risk reduction by indicating the position of each business site with reference to “Evaluation Table of Degree of Impact on Safety.”
For example, the Hiratsuka Factory recorded a total translation discharge amount for human health of 239.162 tons and ranked V, while with a total translation discharge amount for the ecological system of 34.097 tons, it ranked 4.
Accordingly, the degree of impact on safety of the Hiratsuka Factory is indicated as “V-4.”

Reasons for changes in FY 2018

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Mishima Plant, IV-4 to V-4
The effects on human health improved.
The amounts handled and discharged were reduced for No.80 xylene and No. 333 hydrazine.
Hiratsuka Factory, V-4 to II-4
The effects on human health worsened.
For No. 58 ethylene glycol monomethyl ether, the amount handled was increased from 14.8 t to 15.4 t, and the amount discharged was also increased to 4.7 t.
Adhesives and Sealants Plant, VI-5 to VII-4
The effects on human health improved.
The effects on the ecosystem worsened.
For No. 300 toluene, the amount handled was reduced from 18.8 t to 12.0 t, and the amount discharged was also reduced.
However, the amounts handled and discharged were increased for No. 296 1,2,4-trimethylbenzene and No. 302 naphthalene.
There were no changes in the rank for the Onomichi Plant, Shinshiro Plant, Shinshiro-Minami Plant, Mie Plant, Ibaraki Plant, and Nagano Plant.

Explanation about degree of impact on safety

Toxicity ranking and toxicity factor

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Rank A B C D
Toxicity factor 1000 100 10 1

Ranking of effects on human health

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Rank Total converted emissions (Effects on human health)
I 10,000t or more
II 3,000t to less than 10,000t
III 1,000t to less than 3,000t
IV 300t to less than 1,000t
V 100t to less than 300t
VI 30t to less than 100t
VII 10t to less than 30t
VIII Less than 10t

Ranking of effects on the ecosystem

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Rank Total converted emissions (Effects on the ecosystem)
1 10,000t or more
2 1,000t to less than 10,000t
3 100t to less than 1,000t
4 10t to less than 100t
5 Less than 10t

Changes in safety evaluation of each plant

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Plant Name 2014 2015 2016 2017 2018 Improvement or worsened points
Hiratsuka Factory II-4 II-4 II-4 V-4 II-4 The effects on human health worsened from the previous year (FY 2017).
Adhesives and Sealants Plant VII-5 VII-5 VI-4 VI-5 VII-4 The effects on human health improved, and the effects on the ecosystem worsened as compared with the previous year (FY 2017).
Nagano Plant VIII-5 VI-5 VII-5 VIII-5 VIII-5 There was no change from the previous year (FY 2017).
Ibaraki Plant VII-5 VII-5 VII-5 VII-5 VII-5 The effects on human health improved from the previous year (FY 2017).
Shinshiro Plant IV-4 IV-4 IV-4 IV-4 IV-4 The effects on human health improved from the previous year (FY 2017).
Shinshiro-Minami Plant V-5 V-5 V-5 V-5 V-5 The effects on human health improved from the previous year (FY 2017).
Mie Plant VI-4 VI-4 VI-4 VI-5 VI-5 The effects on human health improved from the previous year (FY 2017).
Mishima Plant V-4 V-4 V-4 IV-4 V-4 The effects on human health improved from the previous year (FY 2017).
Onomichi Plant VIII-5 VIII-5 VIII-5 VII-5 VII-5 The effects on human health improved from the previous year (FY 2017).
  • As the Nagano Plants have no substances to be reported (less than 1 ton), their details are not attached.
  • Each plant discloses information in accordance with the requirements of the law.
Discharge and total transfer amounts of PRTR in domestic factories
Discharge and total transfer amounts of PRTR in domestic factories (by location)
Onomichi Plant
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Shinshiro Plant
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Shinshiro-Minami Plant
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Mishima Plant
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Mie Plant
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Hiratsuka Factory
表を拡大する
Adhesives and Sealants Plant
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Ibaraki Plant
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Nagano Plants
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