On March 1, 2023, 3rd year students in Technology, Safety and Occupational Health Practical practice in evaluating dust smaller than 10 microns, PM-10 and dust smaller than 100 microns, TSP at construction sites with Gravimetric High volume standards and NIOSH Manual of Analytical Methods (NMAM), Fourth Edition on Particulate not. otherwise Regulated, Respirable 0500, 0600 according to Announcement of the National Environment Board No. 10 (B.E. 2538) and No. 28 (B.E. 2550)
