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 2823.437 tons and ranked Ⅲ, while with a total translation discharge amount for the ecological system of 18.263 tons, it ranked 4. Accordingly, the degree of impact on safety of the Hiratsuka Factory is indicated as “Ⅲ-4.”
Reasons for changes in FY 2023
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| Hiratsuka Factory, Ⅲ-5→Ⅲ-4 ecosystem impact is worse than last year |
The amount of No. 300 toluene handled and discharge increased. |
| Onomichi Factory, Ⅶ-5 → Ⅷ-5 human health impact is better than last year |
The amount of No. 392 n-hexane handled and discharge decreased. |
| There were no changes in other plants. | |
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 | 2019 | 2020 | 2021 | 2022 | 2023 | FY 2023 Improvement or worsened points |
|---|---|---|---|---|---|---|
| Hiratsuka Factory | Ⅱ-4 | Ⅱ-4 | Ⅲ-4 | Ⅲ-5 | Ⅲ-4 | No change in human health impact but ecosystem impact is worse compared previous year (FY 2022). |
| Adhesives and Sealants Plant | Ⅶ-5 | Ⅶ-5 | － | － | － | Not applicable after 2021. |
| Nagano Plant | Ⅷ-5 | Ⅷ-5 | Ⅷ-5 | Ⅷ-5 | Ⅷ-5 | There was no change from the previous year (FY 2022). |
| Ibaraki Plant | Ⅵ-5 | Ⅵ-5 | Ⅵ-5 | Ⅵ-5 | Ⅵ-5 | There was no change from the previous year (FY 2022). |
| Shinshiro Plant | Ⅳ-4 | Ⅴ-4 | Ⅶ-5 | Ⅶ-5 | Ⅶ-5 | There was no change from the previous year (FY 2022). |
| Shinshiro-Minami Plant | Ⅴ-5 | Ⅴ-5 | Ⅴ-5 | Ⅴ-5 | Ⅴ-5 | There was no change from the previous year (FY 2022). |
| Mie Plant | Ⅵ-5 | Ⅵ-5 | Ⅵ-5 | Ⅵ-5 | Ⅵ-5 | There was no change from the previous year (FY 2022). |
| Mishima Plant | Ⅳ-4 | Ⅴ-4 | Ⅵ-5 | Ⅵ-5 | Ⅵ-5 | There was no change from the previous year (FY 2022). |
| Onomichi Plant | Ⅷ-5 | Ⅶ-5 | Ⅶ-5 | Ⅶ-5 | Ⅷ-5 | No change in ecosystem impact but human health impact is better compared previous year (FY 2022). |
- 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
Shinshiro Plant
Shinshiro-Minami Plant
Mishima Plant
Mie Plant
Hiratsuka Factory
Ibaraki Plant
Nagano Plants
