ABSTRACT
Carbon monoxide comes up from the combustion of gas, wood and coal during the industrial processes and since it’s a tasteless, odorless, colorless gas it can be absorbed into body in a short time resulting acute intoxication.The result of planned inspection with laboratory analysis at Ore industrial workshops and fields located in Darkhan-Uul province conducted by Specialized Inspection Place in 2013 was higher than the permissible level which is indicated in Mongolian national standard of occupational hygiene MNS4990-2000 by 60.2 mg/m3 and was higher than the short time permissible exposing level which is indicated Occupational Safety and Health Agency (OSHA) of USA by 20 ppm, therefore we predicted that there is a pollution of carbon monoxide in present industry and conducted this study.For the determination of carbon monoxide exposure by workshops and departments, the average level of CO for workers was 17 mg/m3, maximum was 57.3 mg/m3, the average level was for dayworkers 44.9 mg/m3, for night workers it was 102mg/m3 and maximum was 427 mg/m3 in RIW. Identifying level of exposure by the type of workers, for servicemen were 96.2-427 mg/m3 for welders was 46.4 mg/m3 and mechanics was 140.5mg/m3 which were higher than others.Comparing the results of present study with the permissible level of Mongolian national standard of occupational hygiene MNS4990-2000, was higher by 50-120mg/m3 and with the 8 hours of time weighted average (TWA) of Occupational Safety and Hygiene Agency (OSHA), was higher by 20-80 ppm.