The purpose of this analysis is to establish the preliminary ventilation confinement zone (VCZ) for the dry transfer facility (DTF). The results of this document is used to determine the air quantities for each VCZ that will eventually be reflected in the development of the ventilation flow diagrams. The calculations contained in this document were developed by D and E/Mechanical-HVAC and are intended solely for the use of the D and E/Mechanical-HVAC department in its work regarding the HVAC system for the dry transfer facility. Yucca Mountain Project personnel from the D and E/Mechanical-HVAC department should be consulted before use of the calculation for purposes other than those stated herein or used by individuals other than authorized personnel in D and E/Mechanical-HVAC department.