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September 30, 2007 NOA Project Number: E07147A Table 2. 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 Kingdon, 0-5 Fine sandy loam;SM <2 5.6-7.3 2.0-6.0 Moderate: 0-2% 5-14 Fine sandy loam;SM <2 6.1-7.3 2.0-6.0 wetness, slopes 14-28 Sandy loam,fine sandy loam; <2 6.1-7.3 2.0-6.0 peres slowly 189 SM 28-42 Fine sandy loam,loam;SC-SM, <2 6.1-7.3 0.6-2.0 CL-ML 42-61 Fine sandy loam,sandy loam, <2 6.6-8.4 2.0-6.0 coarse sandy loam;SM Tokay fine 0-19 Fine sandy loam;SM <2 6.1-7.8 2.0-6.0 Slight sandy loam, 19-45 Fine sandy loam,sandy loam; <2 6.1-7.8 2.0-6.0 0-2% SM slopes,256 45-60 Fine sandy loam,sandy loam <2 6.1-8.4 2.0-6.0 coarse sandy loam;SM Tujunga 0-22 Loamy sand;SW-SM,SM,SP- <2 6.1-7.3 6.0-20 Severe:poor 259 SM filter 22-67 Loamy sand,fine sand,sand; <2 6.1-7.8 6.0-20 SW-SM,SM,SP-SM Note:The table descriptions do not necessarily reflect site-specific soil properties. l� 5.1 Soil Boring Locations A total of two (2) soil borings were advanced on the site, one (1) boring to a depth of approximately three (3) feet and one boring to a depth of approximately 25 feet. The soil borings were later used for percolation test holes; the locations of the percolation tests are indicated in Plate 1. ✓ 5.2 Soil Boring Dimensions The soil borings were 25 feet or three (3) feet deep, as noted above, and were four (4) inches in diameter. A.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 3 presents the representative soil log for the 25-foot deep soil boring. Conditions were comparable in the shallow hole. 5