Chemical Substances Control

It is an important responsibility for companies to not only correctly and safely control chemical substances, which can cause environmental pollution and accidents, but to take measures to reduce their environmental impact by reducing their use and substituting safer chemical substances. Each SII site that uses chemical substances conducts appropriate control and reduction activities as well as ongoing education and training on chemical substance control.

FY 2020 Overview

The FY 2020 total emission of chemical substances subject to control in manufacturing process*1 was 19.2 tons, which was approximately 5 tons less than the total for FY 2019. The amount of PRTR*2 substances handled was 45.8 tons, which was 27.6 tons less than the amount for FY 2019. The main reason for the reduction is due to major business restructuring within the Seiko Holdings Group that took place in April 2020.

*1 There are some items that do not add up to the total due to fractional processing.

*2 PRTR (Pollutant Release and Transfer Register): This system is designed to assess, gather, and disclose data on the volume of chemical materials handled, amounts released into the environment, and volumes transferred in waste materials to points outside the site locations. Companies collect data on the relevant substances and report them to the appropriate government agency once a year.

Breakdown of PRTR Substances (Amount handled and emitted)

FY 2020 PRTR Survey Results (SII sites in Japan only)

PRTR

*Total may not become 100% due to rounding off.

(Unit: kg)
Chemical Substance Amount Handled Released Transferred Recycled Consumed Removed and Treated
1.
Released to the atmosphere
2.
Releases to public water systems
3.
Released to soil
4.
On-site landfill
5.
Transferred to sewage systems
6.
Transferred as waste
7.
Transferred as valuable waste
8.
Transferred as products
9.
Break-down and reaction
Ethylbenzene 607 162 0 0 0 0 445 0 0 0
Xylene 2,879 191 0 0 0 0 723 0 0 1,964
Cobalt and its compound 9,914 0 0 0 0 0 19 225 9,670 0
1,2,4-trimethylbenzene 2,104 11 0 0 0 0 0 0 0 2,094
1,3,5-trimethylbenzene 739 22 0 0 0 0 702 0 0 15
Toluene 1,288 872 0 0 0 0 415 0 0 0
Lead compounds 2,573 0 0 0 0 0 1,820 0 753 0
Nickel compounds 178 0 0 0 0 0 0 0 178 0
Phenol 1,593 239 0 0 0 0 1,275 0 0 79
Hydrogen fluoride and its water-soluble salts 13,380 3 8 0 0 0 12,700 0 0 669
Boron and its compounds 6,283 0 0 0 0 0 2,727 0 3,556 0
Manganese and its compounds 4,233 21 0 0 0 0 0 0 0 4,212
Total 45,770 1,521 8 0 0 0 20,827 225 14,157 9,032

*There are some items that do not add up to the total due to fractional processing.

Measures against Ozone Depleting Substances

SII has completed the total elimination of specified chlorofluorocarbons (CFCs), which are ozone depleting substances, used in our manufacturing processes, however we still use CFCs as refrigerant for chillers and air-conditioners. Our sites in Japan are in accordance with the CFC emissions law and have been striving to prevent leaks during use in addition to disposal through conducting simple checks and periodic inspections since FY 2015.