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Soil Profile and Geologic Information The Site is depicted on the Geologic map of the San Francisco-San Jose quadrangle, California (Wagner, et al., 1991) within a map unit of the Riverbank formation (Plate 9). The surface and near surface soils located at the Site are reported by the USDA Web Soil Survey to be composed of Madera sandy loam, Alamo clay, and Madera-Alamo complex (Plate 10) (USDA, 2020). The table below presents some selected properties of these soils: Table 1. Selected Properties of On-Site Soils (USDA, 1992) Soil Name Depth Unified Soil Salinity Soil Perme- Septic tank and Map Reaction ability absorption Symbol (in) Classification mmhos/cm pH (in/hr) fields Alamo clay, 0-12 Clay; CH <2 6.1 - 7.8 0.06 - 0.2 Severe: 0-2% 12-33 Clay; CH <2 6.6 - 8.4 <0.06 cemented slopes, 33-60 Indurated --- --- --- pan, 102 wetness. Madera 0-19 Sandy loam; SM <2 5.6-7.3 2.0-6.0 Severe: sandy loam, 19-23 Sandy clay loam; SC <2 6.1-7.3 0.2-0.6 cemented 0-2% 23-29 Clay, clay loam; CL, CH, <2 6.6-8.4 <0.06 pan, peres slopes, 193 SC slowly. 29-60 Indurated <2 --- --- Madera- Madera Severe: Alamo 0-10 Sandy loam; SM <2 5.6-7.3 2.0-6.0 cemented complex, 10-20 Clay, clay loam; CL, CH, <2 6.6-8.4 <0.06 pan, peres leveled, 0- Sc slowly. 1% slopes, 20-60 Indurated <2 --- --- 195 Alamo Severe: 0-12 Sandy loam, SM <2 6.1-7.3 0.6-2.0 cemented 12-25 Clay; CH <2 6.1-7.8 <0.06 pan, 25-34 Clay; CH <2 6.6-8.4 <0.06 wetness, 34-60 Indurated --- --- --- peres slowly Note: The table descriptions do not necessarily reflect site-specific soil properties. See description of the map unit for composition and behavior characteristics of the map unit. Soil Borings On November 10 through 23, 2020, Live Oak excavated shallow and deep soil borings on each parcel of the Site for the purpose of percolation testing. The borings were four inches in diameter, 3.36 to 13.1 feet deep, and were excavated by hand auger. The locations of the borings are indicated on Plate 11. LOGE 20-54 Page 4