Appendix E - Geology and Soils Geotechnical Supporting Information COMBINED

LESTER-SHRINER PROPERTY 132-8-2 Page 6 At the time of our recent site reconnaissance, the site was used for cattle grazing and covered with low grass and weeds. Several mature Oak trees were scattered across the site. The northeast corner of the site that is located east of the creek is relatively flat and occupied by two residential structures and several associated barns, sheds, vehicles and miscellaneous fences, gravel driveways and landscaping around the houses. A former barn structure was observed on the Shriner parcel that has collapsed. We also observed an approximately 18-inch diameter by 8-foot deep cistern behind the former barn that appears to have been used to collect water for cattle grazing. 3.2 SITE GEOLOGY A summary of the regional geologic setting was discussed in the “Regional Setting” section of this report. We have adopted the nomenclature of Dibblee, (1980) in assigning geologic unit names for our characterization of the site (see also Dibblee and Minch, 2005). Lowney Associates previously conducted a preliminary geologic and geotechnical investigation of the Lester property, the results of which were published in their report of March 1998. As part of their investigation, they excavated and logged nineteen test pits on the site. While no graphic test pit logs were provided within the report, they did indicate (in table form) the thickness of earth materials at the excavations as well as descriptions of the earth materials encountered within the report. The previous test pits on the Lester Property encountered surficial colluvium varying from typically 2 to 11 feet thick overlying a variety of sedimentary units including; sandstone and lesser occurrences of interbedded sandstone with shale as well as minor claystone. No bedrock structural information was documented in their table or depicted on the site geologic map. A seismic refraction survey was conducted on portions of the site in order to determine rippability of the geologic units. They concluded the rock was rippable with a Catepillar D-9N with Single Shank No. 10 rippers. During our reconnaissance of both parcels in 2014 we observed colluvium and residual soil overlying sedimentary bedrock (Tm and Tmc). The colluvium tends to accumulate within swales and coalesces with alluvial terrace deposits in the lower portions of slopes, or in the nearly level basins between hillsides. Where exposed in cuts and deep erosion scars the colluvium consists of very dark gray brown sandy clay and fat clay with sand. We did not observe evidence of past disturbance or grading and therefore have not identified any fills at the site. Alluvial terrace deposits were observed in the creek bank exposures along the path of Devaney Creek. These deposits consist of horizontally stratified gravels and sands. The gravels tend to be somewhat flattened and the deposits very dense and form nearly vertical to vertical slopes. We observed sandstone and shale at various parts of the site at the ground surface and in particular within the creek bank exposures. The sandstone was either massive cemented and resistant to erosion (blocky outcrops at the ground surface), or medium bedded and weakly cemented (within the creek channel). Our field measured bedding attitudes suggest there may be a dip- slope geometry within the bedrock along the southern flank of the ridges in the western portion of the property. Variations in bedrock bedding orientations within the Devaney Creek suggests may be associated with the mapped detachment fault that was mapped by Crane (1988). A zone of convoluted bedding and tight folding within the Tertiary bedrock was also noted within the Devaney Creek channel approximately 130 feet east of the mapped projection of the mapped fault of Crane. This secondary zone of deformation may represent a subsidiary fault. These faults do not cut geology formations younger than Quaternary, and therefore, are not Ii! CORNERSTONE EARTH GROUP