On August 25, during a telephone conversation with a representative of Core Laboratories W. Allan R. Sattler of Sandia National Laboratories requested that Klirikenberg Permeability (Gas-Slippage Con&) Determinations be performed on core material recovered from the subject wells . This work is part of the Western Gas Sands Project sponsored by the Department of Energy, Morgantown Energy Technology Center, Morgantown, West Virginia.