PB 22 10 Altera 769 LLC Filed Application with Exhibits Final Site Plan Phase 2

encountered that generally consisted of sandy loam and loamy sand with various amount of gravel. The natural residual soils were encountered to depths ranging between approximately five feet and ten feet below the ground surface; corresponding to elevations ranging between 487.0 feet and 463.2 feet. The top of weathered rock (basalt) was encountered beneath the residual soils at depths ranging between approximately five feet and ten feet below existing site grades; corresponding to elevations ranging between approximately 487.0 feet and 463.2 feet above the referenced elevation. Each soil profile pit was terminated due to machine refusal on apparent bedrock. 4.2 Seasonal High Groundwater and Permeability Indicators of seasonal high groundwater (i.e. soil mottling) and groundwater was not encountered within the soil profile pit explorations. Groundwater was not encountered at previous soil boring locations. Groundwater levels are expected to fluctuate seasonally and following significant periods of precipitation. A summary of the seasonal high groundwater levels and permeability test results is presented in the table below: SUBSURFACE AND PERMEABILITY SUMMARY Estimated Permeability Surface Seasonal High Sample (Inches/Hour) Location Elevation Groundwater Depth Comments (ft) Depth Elevation (Inches) Replicate Replicate (ft) (ft) A B Refusal at ± SPP-1 466.0 26 <0.06 <0.06 8.0 ft. (±el. 458.0 ft.) Refusal at ± SPP-2 475.0 30 <0.06 <0.06 10.0 ft. (±el. Not Encountered1 465.0 ft.) Refusal at ± SPP-3 481.0 40 <0.06 <0.06 10.0 ft (±el.

Refusal at ± SPP-3 481.0 40 <0.06 <0.06 10.0 ft (±el. 471.0 ft.). Refusal at ± SPP-4 487.0 36 <0.06 <0.06 5.0 ft. (±el. 482.0 ft.) 1 Since indicators of seasonal high groundwater and groundwater were not encountered, the depth to seasonal high groundwater can be estimated to be below the termination/refusal depth of the soil profile pits Based on the laboratory testing, permeability rates tested at depths 40 inches or less were less than 0.06 inch/hour which is generally consistent with a hydrologic soil group (HSG) D. Altera 769, LLC c/o Altera Development 4 2530-99-006E