Page 77 - 56-1 One Report 2022 EN

Part 1 Business Operation and Operating Performance

From the results of the wastewater quality inspection, it was found that Thaicom Teleport and DTH Center, Pathum
Thani, had a BOD of 1 mg/l, which was less than the standard. Total Dissolved Solids were at 533 mg/l, which was
slightly above the threshold, but it had decreased from 2021. The results of the examination in all other parameters
were found to be below thresholds.

Comparison between 2021 and 2022 from the quality test results of wastewater samples from Thaicom Teleport
and DTH Center, Pathum Thani.

Water Quality Index
The highest criteria set by 2021 2022
Parameters
drainage control standard Test Results (mg./l) Test Results (mg./l)
type
PH 5-9 7.8 7.3
Total Dissolved Solid Not more than 500 566 533
Suspended Solids Not more than 30 21 8
Settleable Solids Not more than 0.5 <0.1 <0.1
Oil and Grease Not more than 20 0.2 1.1
Nitrogen (TKN) Not more than 35 2.90 2.01
Sulfide Not more than 1.0 0 0
COD Not more than 120 24 20
BOD Not more than 20 <1 1

Water Consumption

Office 2019 2020 2021 2022/Target
(Cubic meter) (Cubic meter) (Cubic meter) (Cubic meter)
1.Thaicom Teleport and DTH
Center, Pathum Thani 5,357 4,180 3,875 4,137/5,760
2. Thaicom office on 28-29
floors, SJ Infinite 1 Business 75 69 46 79/100
Complex

Operating Results:
 For Thaicom Teleport & DTH Center, Pathum Thani, the consumption in 2022 increased by 262 Cubic
meter or 6.67% compared with 2021.

 As the Company moved the office from Nonthaburi to SJ Infinite 1 Business Complex in the 3rdquarter of
2022, the target consumption was set at around 100 Cubic meters. However, the Company still needs to
monitor the actual consumption in 2023 in order to set the appropriate target for the following years.

In addition, the Company saves water by reusing used water to water trees around the Thaicom Teleport & DTH
Center, Lat Lum Kaeo District, Pathum Thani Province, which has saved water and water supply cost.

Part 1 Page 63