Mr. Percy Foster:

There is not enough capacity in the industry at present in the composting, anaerobic digestion, lime stabilisation or drying sectors. Once security is provided people will invest and build extra facilities to provide the treatment capacity. With regard to anaerobic digestion plants taking in material which potentially might shock the system, as I mentioned, people slowly introduce new materials over time. Smells and odours are highly controlled through the local authority waste permit or the EPA waste licence. With regard to the heavy metal content of sludge, our main focus was to examine the overall management of sewage sludge and whether it is managed in accordance with the code of good practice and what type of treatment process it goes through. We did not examine the heavy metal content of sewage sludge in great depth, but we can do so and revert to the committee. I ask Deputy Flanagan to repeat his question.