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EXHIBIT 38 - Continued. Soil moisture conditions, and the extent of the capillary fringe in particular, depend on the lithology and characteristics of the alluvium containing the water table. Clay materials are capable of high moisture retention, while an aggregate has almost no retention capability, be- cause of the difference in porosity of the two materials. Thus, the capillary fringe in alluvium consisting of clay will extend farther above the water table than that of alluvium consisting of gravel. In addition, the interface between one lithology and another within the alluvium has a dramatic effect on moisture content. Even the interface between the A and B soil horizons can affect the amount of moisture available within the root zone. To document the above effects on soil mo • topsoil thickness, root depth, and water table alluvial wells was applied to the data collected access tubes. Specifically, information was used Draw, well AL-1 on Williams Draw, and well AM-4 isture, information on elevation from nearby from the neutron probe from well AI-1 on Bush on Sudduth Draw. The location of the alluvial wells is shown on Map 15, Kerr Mine Area Ground [Dater Hydrology. A11 of the above information is graphically presented in this Exhibit in Figure 1, Soil Moisture Logs. The raw data collected were interpreted considering site-specific conditions of lithology, topsoil, roots and alluvial water. These logs are discussed below. The soil moisture conditions in the intermittent drainages of Bolton, Bush, Williams and Sudduth Draw were found to be very similar. These logs were adjusted only to correct for anomalies in the raw data caused by the topsoil-alluvium interface and water table elevation, since the lithology at all four locations was identical. When adjusted for site-specific conditions, the logs of Bolton, Bush and lilliams Draw show an increase in soil moisture in the interval below the root zone •