Corporate Social Responsibility Information

Management of Hazardous Chemical
Substances

Management of Chemical Substances at Research Institute and Plants

Management of chemical substances at the Tsukuba Research Institute

At the Tsukuba Research Institute, the Chemical Substances Handling Manual prescribes procedures from the receipt to disposal of chemical substances, and the Manual for Responding to Disasters Involving Chemical Substances prescribes procedures for preventing and dealing with accidents in the event of a disaster. Based on these two manuals, the institute is committed to the safe handling of chemical substances, and twice a year, it takes an inventory for the purpose of identifying the chemical substances in its possession and disposing of any unnecessary stock. Particularly with regard to hazardous chemical substances, the institute has implemented various measures in preparation of a disaster, such as installing dedicated storage lockers and keeping the substances under lock and key, as well as installing partitions where liquid substances are stored to prevent them from tipping over.

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Management of chemical substances at Sumitomo Forestry Crest Co., Ltd.

At Sumitomo Forestry Crest Co., Ltd. plants, environment-related work manuals and regulations have been established to prevent chemical leaks and other environmental accidents. In accordance with these provisions, the plants regularly measure the concentrations of air pollutants, water pollutants and organic solvents in exhaust gas to check that there are no problems.
At the No. 2 Kyushu Plant, where a large amount of chemical substances are handled, leak response equipment is always on hand and emergency training is practiced as measures for preventing spills.

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FY 2015 List of PRTR Substances Total Use, Discharge, and Transfer*1
(Data covers Sumitomo Forestry Crest Co., Ltd.)
Designated Chemical Substance Number Designated Chemical Substance Unit Total Use Total Release symbol for third party assurance Total Transfer symbol for third party assurance
4 Acrylic acid and its water-soluble salts kg 11,512 0 0
7 n-Butyl acrylate kg 11,168 0 31
84 Glyoxal kg 1,850 0 3
134 Vinyl acetate kg 2,145,804 2,495 30
186 Methylene chloride kg 15,786 12,000 3,600
349 Phenol kg 47,160 1 19
395 The water-soluble salts of peroxydisulfuric acid kg 3,447 0 8
407 POAE (C=12~15)*1 kg 2,230 13 6
411 Formaldehyde kg 153,972 46 320
415 Methacrylic acid kg 1,260 0 0
448 Methylenebis (4,1- phenylene) diisocyanate kg 11,827 0 98
243 Dioxins mg-TEQ 73 0
TOTAL*2 2,406,016 14,555 4,115
  • *1 Pollutant Release and Transfer Register (PRTR) is a system in which the company records amounts of designated harmful chemical substances released into the environment, transferred outside as waste or sewage from company properties, and reports to relevant government bodies annually.
    Except for dioxins, designated chemical substances with total release of over 1 ton at Sumitomo Forestry Crest’s plants are included.
  • *2 Total amounts for each variable do not include dioxins.

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Emissions of NOx and SOx (Sumitomo Forestry Crest Co., Ltd.)
Substance Emissions (Unit: kg)
SOx (Sulfur oxide)symbol for third party assurance 2,609
NOx (Nitrogen oxide) symbol for third party assurance 825
Soot and dust 593

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Effluent Water Quality Survey Results
(Imari Plant)
Item*1 Unit Measured Effluent Standards*2
pH - 7.5 5.0~9.0
COD mg/L 28.6 40
SS mg/L 4.0 50
TN mg/L 1.7 60
TP mg/L 0.02 8
Effluent Water Quality Survey Results
(Tsukuba Research Institute)
Item Unit Measured Effluent Standards*3
pH - 7.9 5.8~8.6
BOD*4 mg/L 13.0 160
SS mg/L 7.0 200
Total n-hexane extract substances (total mineral oils) mg/L Less than 1 5
Total n-hexane extract substances (total plant and animal fats/oils) mg/L 1.0 30
Total Phenols mg/L Less than 0.025 0.5 or less
  • *1. pH = concentration of hydronium ions, COD = Chemical Oxygen Demand, SS = Suspended Solids, T-N = Total Nitrogen, T-P = Total Phosphorous
  • *2. Effluent Standards uses values stipulated by prefectural ordinance.
  • *3. Effluent Standards uses values stipulated by the Water Pollution Control Act. Total Phenols uses standards required by the Tsukuba City Pollution Prevention Agreement.
  • *4. BOD = Biochemical Oxygen Demand

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Proper Treatment of Building Materials Containing Asbestos

The Sumitomo Forestry Group has secured appropriate disposal routes for asbestos. At Sumitomo Forestry, a Guide for Appropriate Measures during Demolition Work has been formulated, and it endeavors to prevent asbestos being released into the air during home demolition work.
At each of Sumitomo Forestry’s office buildings as well, any asbestos is disposed of properly in accordance with the law.

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Storage and Proper Treatment of Polychlorinated Biphenyls (PCBs)

At Sumitomo Forestry Crest Co., Ltd., polychlorinated biphenyl (PCB) waste, such as that contained in used high-voltage capacitors, is properly managed and disposed of in accordance with the PCB Special Measures Law. In fiscal 2015, the extra PCB waste, 272 units and 10,059.7 kg in quantity, was generated as a result of plant closure and following facility demolition, and 22 units (8,570 kg) of the 272 units were disposed within the year. As at the end of the fiscal year, 475 units were being stored for later disposal.

Disposal of PCB Waste
FY 2014 FY 2015 Change
225 Units 475 Units +250 Units (+1,489.7 kg)

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Project for Soil Purification Technology and Environmental Remediation Aided by Plants

An issue in re-using the site of an old factory is the environmental impact associated with soil contamination and the cost burden of any remedial measures. For example, under the revised Fire Service Act of Japan, gasoline stations are now obliged to repair any underground tanks that have laid under the ground for more than 40 years, and as a consequence of this, it is expected that between 1,000 and 2,000 stations will close down each year.
In order to meet the demand for environmental remediation and measures dealing with soil contamination, the Sumitomo Forestry Group has been working on cleansing contaminated soil by using the functions of plants (phytoremediation). As part of this, during fiscal 2012, in collaboration with JX Nippon Oil & Energy Corporation, the Group developed a method for purifying soil contaminated with oil using Burning Field, a variety of Japanese lawn-grass independently registered by the Group.
One of the functions possessed by the variety of Japanese lawn-grass used in this method is that the nutrients transpiring from its roots activate microorganisms in the soil, and the upshot of this is that it has the potential to inexpensively reduce the oil content in polluted soil. This method has been adopted at nine sites so far to purify areas where gasoline stands or oil depots once stood, with purification at three sites now complete.
In fiscal 2013 and 2014, the Ministry of the Environment conducted a study on low-cost, low-impact technologies for surveying and for counteracting contaminated soil. The study found that oil-degrading microorganisms tend to become more active, and were recognized as having potential to be applied at sites heavily contaminated with oil.
Moving forward, by steadily producing results in soil purification based on this technique, the Group will continue to help resolve the nationwide problem of oil contamination.

Grass laid on the site where a gasoline station once stood

Grass laid on the site where a gasoline station once stood

CSR Report 2016