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January 24, 2005 NOA Project Number: E04158A sand loam, 0 to 2 percent slopes, and the Exeter sandy loam, 0 to 2 percent slopes (Plate 8) (Soil Surrey of San Joaquin County, USDA SCS, 1992). Table 3 presents some selected properties of the soils: Table 3. —San Joaquin County Soil Survey— Selected Soil Properties of On-Site Soils. Soil Name Depth Unified Soil Classification Salinity Soil Perme- Septic tank and Map (in) 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,SC <2 6.6-8.4 <0.06 pan,peres slopes,193. 29-60: Indurated <2 --- --- slowly. Loaxnd r 0-26: Sandy loam;SM,SC-SM <2 6.1 -7.3 0.6-2.0 Severe: loam, 26-33: Sandy clay,clay loam,loam;CL, <2 6.6-7.8 0.6-2.0 cemented SC pan,peres ,157. 33-60: Indurated --- --- --- slowly. Note:The table descriptions do not necessarily reflect site-specific soil properties. 5.1 Soil Boring Locations Four shallow soil boxings, one on each proposed parcel,were installed at the Site using a hand auger. Two deep soil borings were excavated using a truck mounted drilling rig on Parcels 1 and 2. The location of the borings are shown in Plate 1. 5.2 Soil Boring Dimensions The soil borings were advanced to depths of between 3.20 to 3.66 feet using a 3-inch diameter hand auger. The two deep borings on Parcels 1 and 2 were excavated to a depth of approximately 25 feet. The soil borings were used for percolation test holes. 5.3 Soil Lithology Observed Generally, the soil encountered in the boring is similar to the soils reported by the San Joaquin County Soil Survey for the area (USDA, 1992). Table 4 presents a representative soil log for the shallow soil borings. Conditions were comparable in all six borings. r 7 '-'04r..