Preconstruction services means consulting to provide a contracting agency and its designer with information regarding the impacts of design on the physical construction of the project, including but not limited to: Scheduling, work sequencing, cost engineering, constructability, cost estimating, and risk identification. Under a preconstruction services contract, the CM/GC contractor may provide consulting services during both preliminary and, subject to provisions in this subpart, final design. Such services may include on-site material sampling and data collection to assist the contacting agency's design team in its preliminary design work, but do not include design and engineering-related services as defined in 172.3 of this chapter. The services may include the preparation of plans typically developed by a construction contractor during the construction phase (such as preliminary staging or preliminary falsework plans) when needed for the NEPA process. However, services involving plans or submittals that are considered elements of final design and not needed for the NEPA process (such as shop drawings or fabrication plans) is not allowed, even on an at-risk basis, prior to the completion of the NEPA review process.