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An assessment was conducted by SGS (Thailand) Co., Ltd., a Certification Body (CB), to evaluate the company's ISO certification.

Don Muang Tollway Public Company Limited, has undertaken the certification process for the ISO 9001:2015 and ISO 14001:2015 standards. The Certification Body responsible for this process is SGS (Thailand) Co., Ltd.

The certification process commenced with a Stage 1 audit on January 24-25, 2022, where no critical issues were identified. Following this, a Stage 2 audit took place from February 21 to 23, 2022. The outcome of this audit was positive, leading to the company's successful certification for both ISO 9001:2015 and ISO 14001:2015 standards, with no non-conformities found. Congratulations on this commendable achievement