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Soil Suitability / Nitrate Loading Study <br />Buddhist Temple Proposed Dormitory • Stockton, California <br />July 11, 2019 • Terracon Project No. NA177056 <br />lrerracon <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 B1 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 B2 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, <br />moist SM <br />B2 <br />0 — 2.0 Silty sand, fine grained, dark <br />brown, moist <br />Sandy silt, light brown, moist <br />Silt with sand, dark brown, moist <br />SM <br />2.0 to 2.5 <br />2.5 to 3.5 <br />ML <br />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,s„gndy_ 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 <br />03N06E31_097949 <br />Location Depth <br />(feet) <br />176 <br /> <br />Thornton Road, 1/2 mile north of Eight Mile, 1/2 mile west of Thornton Road <br />Responsive • Resourceful • Reliable 11