Occupational Asthma Reference

Daae HL, Heldal KK, Madsen AM, Olsen R, Skaugset NP, Graff P., Occupational exposure during treatment of offshore drilling waste and characterization of microbiological diversity., Sci Total Environ., 2019;681:533-540,10.1016/j.scitotenv.2019.05.131

Keywords: Norway, oil drilling, mud, endotoxin, bacteria, exposure

Known Authors

If you would like to become a known author and have your picture displayed along with your papers then please get in touch from the contact page. Known authors can choose to receive emails when their papers receive comments.


The exposure for workers handling and recycling offshore drilling waste are previously not described, and given the potential for exposure to hazardous components, there is a need for characterizing this occupational exposure. In this study five plants recycling offshore drilling waste with different techniques were included. Measurements were conducted in both winter and summer to include seasonal exposure variations. Altogether >200 personal air-exposure measurements for oil mist, oil vapor, volatile organic compounds (VOC), hydrogen sulfide (H2S) and solvents were carried out respectively. Microorganisms related to drilling waste were identified in bulk samples and in stationary air measurements from two of the plants. The exposure to oil mist and oil vapor were below 10% of the current Norwegian occupational exposure limits (OEL) for all measured components. The plants using the Resoil or TCC method had a statistically significant higher exposure to oil vapor than the plant using complete combustion (p-value < 0.05). No statistically significant difference was found between the different treatment methods for oil mist. The exposure to solvents was generally low (additive factor?< ?0.03). Endotoxin measurements done during winter showed a median concentration of 5.4 endotoxin units (EU)/m3. Levels of H2S above the odor threshold of 0.1?ppm were measured at four plants. Both drill mud and slop water contained a high number and diversity of bacteria (2-4?×?104 colony forming unit (CFU)/mL), where a large fraction was Gram-negative species. Some of the identified microorganisms are classified as potentially infectious pathogens for humans and thus might be a hazard to workers.

Full Text

Full text of this reference not available

Please Log In or Register to add the full text to this reference


Please sign in or register to add your thoughts.

Oasys and occupational asthma smoke logo