Ms Geraldine Tallon:

From the moment a contract is started to when it finishes can be less than five years. I include the planning phase when I refer to five years. The construction phase for a contract is very dependent on whether the contract is specifically for a treatment plant or whether it is a treatment plant and collection system. Generally, treatment and collection are separate contracts in practice. However, a treatment plant may be for secondary treatment only; secondary treatment with nutrient reduction; secondary treatment with nutrient reduction and sludge treatment; or may include a sea outfall. There are different aspects to the type of infrastructure being provided. These plants tend to be site specific.