Corporate Social Responsibility

Item/Year Y2013 Y2014 Y2015 Y2016 Y2017
Energy and material use Water use (Mm3) 29.23 28.91 26.25 24.72 26.73
Power use (MWh) 4,941,587 5,025,675 4,954,781 5,119,279 5,480,337
Diesel (Mwh) 3,223 3,261 3,144 3,413 4,654
LNG (Mwh) 123,018 129,622 127,364 122,701 130,909
Liquid crystal (tons) 62.7 101.1 100.01 94.2 103.3771
Al etching (tons) 16,552.00 17,670.00 19,280.60 19003.73 20,051.60
Developer (tons) 22,378.1 20,800.8 21,294.3 21,404.9 24,200.14
Stripper (tons) 16,108.0 16,111.0 6,647.2 14,237.8 17,532.35
Thinner (tons) 7,133.3 7,466.9 15,048.3 6,051.6 7,221.88
Photo resists (tons) 6,070.6 6,499.3 7,190.7 6,221.5 6,491.40
GHG emission Scope 1 (million tCO2e) 0.523 0.511     0.439 0.455 0.436
Scope 2 (million tCO2e) 2.857 3.135 2.804 2.615 3.034
Scope 3 (million tCO2e) 0.013 0.035 0.018 0.025        0.022
Wastewater discharge Wastewater (m3) 21,895,687 21,807,195 19,822,541 17,891,774 19,398,443
COD (tons) 1,723.20 2,152.70 1,778.50 2,101.7 2,137.68
BOD (tons) 334.1 703.3 556.4 708.5 829.7
SS (tons) 621.9 1,003.30 867.6 679.3 1,127.0
Water recycling Process water reclamation rate 82.8% 84.9% 94.20% 95.4% 95.40%
Process water reclamation amount (tons) 65,154,840 69,873,633 235,957,877 240,354,817 288,678,559
Waste disposal Total waste (tons) 112,364 111,264 97,694 98,556 116,128
Hazardous waste (tons) 40,423.0 29,168.5 68,475.9 31,951.0 32,419.8
Non-hazardous waste (tons) 71,941.1 82,095.2 29,218.2 66,604.5 83,708.7
Air pollution emission VOC (tons) 111.2 151.9 104.7 158.2 157.8
SOx (tons) 14.1 15.2 42.3 46.2 38.3
NOx (tons) 9.3 16.3 15.8 15.3 20.2

Notes:
1. For VOCs, NOx, and SOx, the measured values were converted into emission intensity (kg/m2), then the total emission was calculated using the actual panel area.
2. COD, BOD, and SS are calculated based on actual test results.
3. The equation for calculating process water recycling was revised in 2015, causing significant changes to recycling quantity and recycling rate. The water charts and statistics of various sites were inspected and approved by the Bureau of Environmental Inspection.