NMED shall review the completed preliminary engineering reports (PER) and EID in the development of alternatives and the selection of a preferred alternative. An adequate EID shall be an integral part of planning submitted to NMED. The EID shall be of sufficient scope to enable the responsible official to make determinations on requests for partitioning the environmental review process and for preparing an environmental assessment (EA).
N.M. Admin. Code § 20.7.7.14