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• Soil Profile and Geologic Information The Site is mapped on the Geologic Map of the San Francisco-San Jose Quadrangle (Wagner, et. al., 1991). It is depicted within a map unit of the Riverbank formation (Plate 7). The surface and near surface soils located at the Site are reported by the Web Soil Survey (USDA, 2017) to be composed of Madera sandy loam and Madera-Alamo complex (Plate 8). 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 (in) Classification mmhos/cm Reaction ability absorption Symbol pH (in/hr) fields 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 June 15 through 19, 2018, Live Oak excavated shallow soil borings on three proposed parcels parcel of the Site, as well as shallow and deep borings on the final proposed parcel, for the purpose of conducting percolation tests. The borings were four inches in diameter, 3.05, 3.15, 3.21, 3.48, and 6.13 feet deep, and were excavated by hand auger (Table 2). The locations of the borings are indicated on Plate 9. The soil in the borings was similar to that described by the Soil Survey. In each boring, silty sand or silty sand with clay was encountered to a depth of approximately 14 inches, followed by sandy clay, clayey sand, or silty sand with clay to the full extent of the boring. On Parcel 1, the soil was found to be relatively uniform across the parcel, to have a higher clay content than the other parcels, and to be more compacted. The soil • logs are presented on Plates 10 through 13. LOGE 1834 Page 5