We constantly work hard to keep the good air quality & noise level of train for passenger comfort with efficient energy management for “Low Carbon Green Growth”
Indoor Air Quality MGMT
We proclaimed environmental & quality management policy with the goal of establishing a subway atmosphere cleaner, and conduct the indoor air quality check for station & train, water cleaning for subway tunnels, cleanups for stations & trains, and overall air quality management by OCC.
Indoor Air Quality Check
- Indoor Air Quality for Multi-purposed Facility (Ministry of Environment)
- Fine Dust(PM-10), and CO : Seoul Metropolitan Government’s Ordinance
- 5 Items for Maintained criteria : PM-10, PM02.5, CO2, HCHO, CO
- 3 Items for Recommended criteria : TVOC, NO2, Rn
2022 result of measure of indoor air quality
Noise Managemen
Noise in underground stations are made from subway and passengers. We conduct semiannual noise check on a regular basis to provide better subway atmosphere to our customers.
Related Laws
Noise Management Laws is not established in Korea at the present
SM9‘s criteria : 80dB
Result of Noise Check(2022)
| Type | Measured Value | Compared to Standard |
|---|---|---|
| Regular Train | 68.23dB | 85.29% |
| Express Train | 69.6dB | 87% |
Average Noise Level
| dB | Noise type | dB | Noise type | dB | Noise type |
|---|---|---|---|---|---|
| 120dB | Taking off and landing of jet plane | 110dB | Noise of excavator and car horn | 100dB | Noise of trackside by train |
| 90dB | Noise in the loud factory | 80dB | Noise in the subway | 70dB | Loud office and telephone bell |
| 60dB | Ordinary conversation and silent car | 50dB | Silent office | 40dB | Library |
| 30dB | Whisper | 20dB | Rustle of leaves |
Data from Korea National Noise Information System (www.noiseinfo.or.kr)
Noise Reduction Measures
Water Quality MGMT
We are promoting long-term environmentally sound and highly economically improvements such as the following : Regular check for water quality, and proper waste water treatment in accordance with relative laws and regulations.
Law for the Preservation of Water Quality
- 8 Items including COD(Chemical Oxygen Demand)
- Semiannual Water Quality Check by SM9
- Annual Sludge Treatment
Depot Sewage Disposal Process
Waste Treatment
We are doing our best in minimizing waste generation based on the principles of minimizing pollutant emission and energy use in production processes, decreasing the effect of processes on humans and the environment, and recycling
Law for the Waste Treatment
- Designated waste(hard, liquid) : Semiannual
- Collection of used fluorescent light : Semiannual
processing site
Process
- Waste Measurement
- Assort into Hard & Liquid
- Request Waste Treatment to Contractor
- Waste Measurement(Contractor: SinDeaHan PT)
- Take Pictures & documentation before Clearance
- Semiannual Waste Treatment by Contractor
Energy Control
We are doing our best to meet National Plan for power supply stabilization according to KEPCO’s energy peak management
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Maintain appropriate indoor seasonal temperature (Summer 26°C or higher, Winter 20°C or lower)
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Use individual cups rather than disposable paper cup
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Tum off lightings and temperature control systems during lunch breaks
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Take the stairs for locations below the fourth floor
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Wear clothes that are seasonally appropriate
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Unplug appliances when getting off work
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Integrate BMW (Bike, Mass transit, Walk) in daily life