[en] The geostatistical characterization of the Eastern Snake River Plains (ESRP) basalt found in the vadose zone at Idaho National Engineering Laboratory (INEL) depend heavily upon instrumentation and computer programs developed by the INEL Geoscience Unit personnel. Laboratory measurements of permeability, porosity, density, capillary pressure-pore-size distributions, and surface area were carried out with equipment developed and fabricated at INEL, and computation of the characterization parameters was carried out using personal computers, with computer programs specifically written for this purpose by the authors. Geostatistical analysis results from Hell's Half Acre were also used to develop distribution models for medial/distal length:width:thickness substrate elements. 3 refs., 10 figs