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November 30,2007 NOA Project Number: E07192A Soil Name Depth SalinitySoil Perme- Septic tank and Map P Unified Soil Classification Reaction ability absorption Symbol (m) mmhos/cm pH (in/hr) fields Tinnin 0-28: Loamy coarse sand;SM <2 6.1-7.8 6.0-20 Droughty: loamy 28-53: Loamy coarse sand,loamy sand; <2 6.1-7.8 6.0-20 fast intake. coarse SM <2 6.6-8.4 6.0-20 sand,0-2% 53-75: Loamy coarse sand,loamy sand, slopes,255. sand;SM Veritas,0- 0-15 Fine sandy loam;SM,SC-SM <4 7.4-8.4 2.0-6.0 \Ioderate: 2%slopes, 15-54 Sandy loam,fine sandy loam; <4 7.4-8.4 2.0-6.0 flooding, 266 SM,SC-SM cemented 54-70 Cemented;-- -- I pLn Note:The table descriptions do not necessarily reflect site-specific soil properties. 5.1 Roil oring Locations A total o ones it boring was advanced on the parcel of the site to a depth of approximately three and a half t The oil boring was used later for a percolation test hole the location of the boring is indicated ate 1. 5.2 Soil Boring Dimensions The soil boring was approximately three and a half feet,as noted above,and was four inches in diameter. 5.3 Soil Lithology Observed Generally, the soils encountered in the boring were similar to the soils reported by the San Joaquin County Soil Survey for the area (USDA, 1992). Table 4 presents a soil log for the three and a half foot soil boring. Table 4. Soil Boring Log. Depth Interval(ft) Soil Type Unified So' la ification 0-3.5 Brown sandy silt SM 5.4 Discussion of Soil Lithology A visual inspection of the shallow soils from on-site drilling indicates potential for percolation because of the silty conditions of the soils. A percolation test is the best method to determine the suitability of the soils. Please see the next section for percolation test results. Generally speaking, coarser-grained soils have much greater potential for percolation than fine-grained or cemented soils. 6 'A4