Management of Chemical Substances and Reduction of Hazardous Substances

Management of PRTR-Designated Substances

Management of PRTR-Designated Substances

Crude oil, petroleum products and petrochemical raw materials contain benzene, toluene, xylene, normal hexane and some other highly volatile substances regulated by the PRTR Law.*1 These substances partially evaporate into the atmosphere as VOCs*2 whenever oil is transferred into or out of storage tanks, as well as when it is loaded onto tanker trucks and ships. To minimize such VOC emissions, the Idemitsu Group stores these chemicals in floating roof tanks that reduce evaporation, and carries out measures aimed at ensuring VOC recovery during transport. Chemical substances transferred to locations outside industrial complexes are disposed of in compliance with the Waste Disposal and Public Cleansing Law.

  • *1 PRTR: Pollutant Release and Transfer Register
  • *2 VOC: Volatile Organic Compounds
Discharge and Transfer of PRTR-Designated Substances
CAS
No.
Substance name Unit Total / Discharged amount – Emissions to atmosphere (standard emission intensity) Total / Discharged amount – Emissions to public water bodies (standard emission intensity) Total / Discharged amount – Emissions to soil (standard emission intensity) Total / Transferred amount – Disposed amount (standard emission intensity) Total
0 Methanol t 0.0 0.0 0.0 0.1 0.1
1 Water-soluble compounds of zinc t 0.0 0.4 0.0 0.0 0.4
13 Acetonitrile t 0.0 0.0 0.0 0.9 0.9
20 2-aminoethanol t 0.0 0.0 0.0 45.6 45.6
33 Asbestos t 0.0 0.0 0.0 31.7 31.7
53 Ethylbenzene t 8.3 0.0 0.0 3.6 12.0
80 Xylene
(also known as dimethyl benzene)
t 24.8 0.0 0.0 2.5 27.3
104 Chlorodifluoromethane
(also known as HCFC-22)
t 0.5 0.0 0.0 0.0 0.5
186 Dichloromethane
(also known as methylene chloride)
t 1.0 0.0 0.0 10.3 11.3
190 Dicyclopentadiene t 0.3 0.0 0.0 0.0 0.3
232 N, N-dimethylformamide t 0.0 0.0 0.0 4.5 4.5
240 Styrene t 19.1 0.0 0.0 0.8 19.9
242 Selenium and its compounds t 0.0 0.0 0.0 12.5 12.5
243 Dioxins mg-TEQ 0.0 4.2 0.0 0.0 4.2
245 Thiourea t 0.0 1.3 0.0 0.0 1.3
262 Tetrachloroethylene t 0.0 0.0 0.0 0.8 0.8
296 1,2,4-trimethylbenzene t 3.3 0.0 0.0 1.0 4.3
297 1,3,5-trimethylbenzene t 0.4 0.0 0.0 0.0 0.4
300 Toluene
(also known as methyl benzene)
t 103.1 0.0 0.0 22.7 125.8
302 Naphthalene t 0.1 0.0 0.0 4.1 4.2
349 Phenol t 0.1 0.0 0.0 2.7 2.8
389 Hexadecyltrimethyl-ammonium
chloride
t 0.0 10.8 0.0 0.0 10.8
392 N-hexane t 187.3 0.0 0.0 7.7 195.0
400 Benzene t 23.2 0.0 0.0 0.3 23.5
412 Manganese and its compounds t 0.0 0.0 0.0 14.0 14.0
438 Methylnaphthalene t 0.2 0.0 0.0 1.7 1.9
453 Molybdenum and its compounds t 0.0 0.0 0.0 0.6 0.6
  • * Scope of calculation: Idemitsu Kosan Co., Ltd. and its consolidated subsidiaries
  • * Chemicals are not listed if the total volume of discharge and transfer is less than 0.1 ton per year. Figures presented above may not be consistent with the totals since they are rounded off to one decimal place.
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