A monk or not a monk, he was still taken to Ban Dan police station where he took a breathalyzer to test his alcohol level. The monk blew a 248 mg. percent. In Thailand, the standard Blood Alcohol Concentration (BAC) limit is set at 0.05 percent, which means you are legal if there is no more than 50 mg/dl. In normal circumstances, 50 mg/dl means about two glasses of beer.
According to police, Jirapong said that he normally resides in Prasat Subdistrict, Buriram Province, but he was ordained as a monk and went to a temple in Chang Phueak Subdistrict, Roi Et Province. He said he drinks because of the stress of being the headman of his temple as well as dealing with his ex-wife. He also mentioned he was upset that his relatives had to remortgage the farm due to not producing enough rice.
After the monk told his story, the Deputy Inspector of Ban Dan Police Station, charged the monk with “drunk and driving” and sent him to detention at Buriram Provincial Court.
Sources: https://www.thaipost.net/main/detail/68586
https://www.thephuketnews.com/questions-answers-thailand-alcohol-blood-level-driving-legal-limit-48873.php