Location: TWS No. A3-20  Simultaneous lamination and hot work   Waterproofing of MH Base was going on inside the shaft and simultaneously lamination work was also ongoing inside the tunnel. Hence we noted 6 ppm CO inside the tunnel due to generated fumes.  Adequate work planning should be carried out and simultaneous hot work and lamination to be avoided in the same shaft or tunnel.
Hazard category: Confined Spaces