In certain circumstances it may be appropriate to add certain elements to a waste management facility once it is operating. This may be in response to changes in operations within the facility, changes to the setting of the site (such as the construction of new homes in close proximity), or changes to environmental regulation or best practice. Either way there may be ways to overcome such issues, for example odour suppression or air extraction systems to mitigate impacts.
It is also possible that a degree of testing may be required at the early stages of a new development. Does a theoretical design solution also work in practice? In the majority of cases the proposed design solution will already be tried and tested. The key facility types where the design solution may need to be tested and adapted are those with a public interface, for example civic amenity sites.