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Soil Suitability/Nitrate Loading Study Merracon <br /> Gribaudo Property ■Acampo, CA <br /> November 12, 2019 ■ Terracon Project No. NA197081 <br /> Table 5. <br /> Summary of Soil Lithology. <br /> Boring Depth Interval Soil Type Unified Soil <br /> (feet) Classification <br /> 0 to 1.0 Sandy silt, moist, brown, fine ML <br /> 61 Sandy silt, moist, brown, fine <br /> 1.0 to 3.25 ML <br /> medium stiff <br /> 0 to 1.0 Sandy silt, dry, brown, fine ML <br /> Sandy silt, moist, brown, fine <br /> B2 1.0 to 9.0 at 7.0 feet coarse to medium ML <br /> grained sand with fine gravel, 7.5 <br /> to 8.0 feet medium gravel <br /> 133 0 to 3.25 Sandy silt, dry, brown ML <br /> 0 to 4.5 Sandy silt, dry, brown, fine ML <br /> B4 4.5 to 5.5 Cemented silty sand, brown, SM <br /> dense. Refusal at 5.5 feet <br /> 1.5.4 Discussion of Soil Lithology <br /> The soils encountered in our percolation test borings were generally fine to medium grained sandy <br /> silts. Generally speaking, coarse-grained soil has a greater potential for percolation than fine- <br /> grained or cemented soil. <br /> 1.6 Percolation Test Information <br /> 1.6.1 Percolation Test Locations <br /> Refer to Section 1.5.1 and Appendix A, Exhibit 2. <br /> 1.6.2 Number of Percolation Tests <br /> Two percolation tests (131 and 63) were performed. <br /> 1.6.3 Boring Preparation and Presaturation <br /> The percolation test borings(B1 and B3)were handaugered on October 21, 2019. Approximately <br /> two inches of"pea gravel'was placed in the bottom of the open boring. A 2.0-inch diameter PVC <br /> pipe with perforations towards the bottom was installed on top of the gravel and the annular space <br /> was backfilled with "pea gravel". Presaturation of the percolation test hole occurred approximately <br /> Responsive■ Resourceful ■ Reliable 10 <br />