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Soil Suitability I Nitrate Loading Study Irerracon <br /> Buddhist Temple Proposed Dormitory ■ Stockton, California <br /> July 11, 2019 tu Terracon Project No. NA177056 <br /> 1.5.1 Soil Boring Locations <br /> The boring locations were marked by the client near the northern site boundary, north of the <br /> existing leach field area. Terracon was unable to handauger borings between the existing storage <br /> containers due to refusal; therefore, boring 131 was advanced south of the eastern most storage <br /> container. Boring B2 was advanced north of the storm water retention basin. <br /> 1.5.2 Soil Boring Dimensions <br /> Borings B1 and 132 were advanced with a 4 inch diameter hand auger to a depth of 3.5 feet bgs. <br /> 1.5.3 Soil Lithology Observed <br /> The following table presents a log of the soil boring. <br /> Table 4. <br /> Summary of Soil Lithology. <br /> Boring Depth Interval (feet) Soil Type Unified Soil <br /> Classification <br /> B1 0-3.5 Silty sand, fine grained, brown, SM <br /> moist <br /> 0-2.0 Silty sand, fine grained, dark SM <br /> brown, moist <br /> B2 ...... ..................................................................................... ---------- --.._.........- ---.._................ <br /> 2.0 to 2.5 Sandy silt, light brown, moist ML <br /> 2.5 to 3.5 Silt with sand, dark brown, moist ML <br /> 1.5.4 Discussion of Soil Lithology <br /> A visual inspection of the shallow soils from the test hole points to favorable conditions for shallow <br /> septic disposal due to the silty-.sandy soils at leach field depths (3 to 3.5 feet bgs). In general, <br /> uncemented coarse-grained soil has a greater potenfiaTfor percolation than fine-grained or <br /> cemented soil. <br /> Terracon searched the Department of Water Resources online Well Completion Records for <br /> additional information regarding soil lithology within 0.5 miles of the site. The following wells were <br /> identified nearest the site. <br /> Table 5. <br /> Well Completion Reports <br /> Well File Number Location Depth <br /> feet <br /> 03N06E31 097949 Thornton Road, '/2 mile north of Eight Mile, '/2 mile west of Thornton Road 176 <br /> Responsive ■ Resourceful ■ Reliable 11 <br />