25th March 2011, 09:37 AM
Actually a very good point, I've been staggered in the past by the inability of most diggers to recognise dodgy substances on site, things like blue asbestos or phenol (thats the reddish fluid that collects in the bottom of your trench overnight when digging in old gasworks - time to run away!) are not, after all, hard to ID....or doesn't everyone have A levels in Physics and Chemistry (back in the 'good old days' when you were still allowed to play with lethal sunstances at school)? Good one for a BAJR guide? :face-huh: