Page 88 - SD RATCH EN

88
Sustainability Report 2020
RATCH Group PCL.
Results of air quality measurement at the top of the stack
Power plant
Average pollutant density from combustion emitted by power plants in 2020
NOx (ppm)
SO2 (ppm)
Backup fuel
Natural gas
Fuel oil
Natural gas
Fuel oil
Ratchaburi Combined Cycle Power Plant
20.92
-
1.07
-
Diesel
Standard limits*
120
180
20
320
Nava Nakorn Power Plant
34.69
-
0.33
-
None
Berkprai Cogeneration Power Plant
43.40
-
1.18
-
RATCH Cogeneration Power Plant
37.85
-
-
-
Limit in accordance with EIA requirement
60
-
10
-
Note : Standards as in the notification of Ministry of Industry on the limit of air pollutants emitted by power-generating, transmission or distribution plants B.E. 2547.
Results of air quality measurement at community around Ratchaburi Power Plant
Ratchaburi Power Plant installed the ambient air quality monitoring systems (AAQMs) to monitor the air quality and assure community of safety. The systems are installed at 4 air quality measuring stations to cover wind directions in all seasons. The system efficiency and accuracy is verified by external inspectors every six months.
Air quality measuring stations at nearby communities
24-hour average
1-hour average
Total Suspended Particulate (μg/m3)
Particulate Matter smaller than 10 micron (μg/m3)
SO2 (ppb)
SO2 (ppb)
NO2 (ppb)
O3 (ppb)
Ban Don Mod Tanoy
42.17
29.50
1.33
2.50
11.83
49.50
Ban Bang Krado
48.60
32.17
1.67
3.00
12.83
51.67
Ban Khlong Khae
37.80
33.20
2.20
3.20
16.60
50.00
Ban Chaonua
32.83
26.50
1.33
2.17
11.60
55.50
Target
(Below standard limits)
330[1]
120[1]
120[1]
300[2]
170[3]
100[4]
Note : μg/m3 = microgram per cubic meter ppb = part per billion
Standard in line with the Notification of National Environment Board:
[1] as specified in the No.24 announcement of the National Environmental Board (B.E.2547) on ambient air quality standards
[2] as specified in the No.21 announcement of the National Environmental Board (B.E.2544) on 1-hour sulfur dioxide standard in
ambient air
[3] as specified in the No.33 announcement of the National Environmental Board (B.E.2552) on Nitrogen dioxide
standard in ambient air
[4] as specified in the No.10 announcement of the National Environmental Board (B.E.2538) on ambient air quality standards