Two of the most important elements of a treatment plant design-build project are the performance and acceptance standards associated with the start-up and commissioning of the treatment plant. Performance standards can be defined as the standards the plant needs to meet in order to operate in compliance with applicable permits over a range of typical operating conditions. Acceptance standards can be defined as the standards the design-builder must meet in order to satisfy the contractual requirements of the design-build agreement with the owner. Ideally, the performance and acceptance standards should be closely aligned. Problems can arise when contractual acceptance standards are overly conservative in relation to the normal performance standards of the facility.