Seoul Line 9 operation

About Company

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”

VISION

Greener World with Eco-friendly Line9 : Water Quality, Air Quality, Noise Management, Waste Treatment, Energy Control

Greener World with Eco-friendly Line9 : Water Quality, Air Quality, Noise Management, Waste Treatment, Energy Control

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.

Water Cleaning for Tracks & Tunnels, Indoor Air Quality Check, Air Conditioning Control by OCC

Water Cleaning for Tracks & Tunnels, Indoor Air Quality Check, Air Conditioning Control by OCC

Indoor Air Quality Check
  • Related Laws
    - Indoor Air Quality for Multi-purposed Facility (Ministry of Environment)
    - Fine Dust(PM-10), and CO : Seoul Metropolitan Government’s Ordinance
  • Checking Items
    - 4 Items for Maintained criteria : PM10, CO2, HCHO, CO
    - 5 Items for Recommended criteria : NO2, Rn, Asbestos, Ozone
  • Y2017 result of measure of indoor air quality(4 Maintained Criteria)
Measured value compared with standard (%) PM-10:53.43%, CO:7.78%, CO2:57.49%, HCHO:6.80%
Measured value against standard value - PM-10, CO, CO2, HCHO(%)
Measured value Standard
PM-10 74.8 140㎍ / ㎥
CO 0.7 9ppm
CO2 574.9 1000ppm
HCHO 6.8 100㎍ / ㎥

Noise Management

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.

Noise Check in Platform / Noise Check in Depot

  • Related Laws
    Noise Management Laws is not established in Korea at the present
    ※SL9’s criteria : 80dB
  • Result of Noise Check

Average during evening rush hour in 2017

Average during evening rush hour
Measured Value Compared to Standard (80dB)
Regular Train 66.7dB 82.88%
Express Train 66.3dB 84.63%

Data from Korea National Noise Information System (www.noiseinfo.or.kr)

Average Noise Level(20dB ~ 120dB)
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

[Average Noise Level]

  • Noise Reduction Measures

PSD Installation, Rail-track Grinding, Rail head lubricator

PSD Installation, Rail-track Grinding, Rail head lubricator

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.

  • Related laws
    Law for the Preservation of Water Quality
  • Water Quality Check : 8 Items including COD(Chemical Oxygen Demand)
    - Semiannual Water Quality Check by SL9
    - Annual check by government
    - Annual Sludge Treatment
  • Depot Sewage Disposal Process

Depot - Waste Water(Non-pressure Flow) - Sewage(Non-pressure Flow) / Waste Water Disposal - Sewage Disposal Pump - Interoepting Manhole - Seonam Sewage Dispodal

Depot

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

Waste Treatment

  • Related Laws
    Law for the Waste Treatment
  • Management Cycle
    - Designated waste(hard, liquid) : Semiannual
    - Collection of used fluorescent light : Semiannual
  • Process

Energy Control

We are doing our best to meet National Plan for power supply stabilization according to KEPCO’s energy peak management

  • In house Energy Saving Campaign

Certified Environmental Management (2010.Dec.23)

ISO 14001(Environmental Management) Certified
  • Eco-friendly work process system
  • Improve the quality of environmental management
  • Use of eco-friendly products
  • Improve the environmental management system by internal ?external review on a regular basis