1. Figure 1 Measured personal respirable dust versus respirable crystalline silica results collected in the SCL environment. Lines show recommended BOHS and IOM RD limit of 1mg m⁻³ and RCS 8-h TWA WEL of 0.1mg m⁻³.
From: Occupational Exposure to Respirable Dust, Respirable Crystalline Silica and Diesel Engine Exhaust Emissions in the London Tunnelling Environment
Ann Occup Hyg. 2015;60(2): doi: /annhyg/mev067
Ann Occup Hyg | © The Author Published by Oxford University Press on behalf of the British Occupational Hygiene Society.

2. Figure 2 Measured personal respirable dust versus respirable elemental carbon results collected in the TBM environment. Line shows recommended BOHS and IOM RD limit of 1mg m⁻³.
From: Occupational Exposure to Respirable Dust, Respirable Crystalline Silica and Diesel Engine Exhaust Emissions in the London Tunnelling Environment
Ann Occup Hyg. 2015;60(2): doi: /annhyg/mev067
Ann Occup Hyg | © The Author Published by Oxford University Press on behalf of the British Occupational Hygiene Society.

3. Figure 3 GM personal respirable dust versus respirable crystalline silica results collected in the SCL environment (a) and GM personal respirable dust versus respirable elemental carbon results collected in the TBM environment (b). Solid vertical line shows recommended BOHS and IOM RD limit of 1mg m⁻³ and hashed horizontal line shows RCS 8-h TWA WEL of 0.1mg m⁻³.
From: Occupational Exposure to Respirable Dust, Respirable Crystalline Silica and Diesel Engine Exhaust Emissions in the London Tunnelling Environment
Ann Occup Hyg. 2015;60(2): doi: /annhyg/mev067
Ann Occup Hyg | © The Author Published by Oxford University Press on behalf of the British Occupational Hygiene Society.

4. Figure 4 BC concentrations, grout pump station, 27/11/14
Figure 4 BC concentrations, grout pump station, 27/11/14. Long dashed vertical line = locomotives entering TBM; dotted vertical line = locomotives exiting TBM.
From: Occupational Exposure to Respirable Dust, Respirable Crystalline Silica and Diesel Engine Exhaust Emissions in the London Tunnelling Environment
Ann Occup Hyg. 2015;60(2): doi: /annhyg/mev067
Ann Occup Hyg | © The Author Published by Oxford University Press on behalf of the British Occupational Hygiene Society.