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Soil Suitability /Nitrate Loading Study Irerracon <br />Munsch Property ■ Lodi, California <br />January 7, 2022 v Terracon Project No. NA217092 <br />Boring <br />Depth Interval (ft) <br />Soil Type <br />Unified Soil <br />Classification <br />Silty Sand, Light Brown, <br />SM <br />3-5 <br />Fine to Medium Grain <br />5-6.5 <br />Silty Sand, Light Brown, <br />SM <br />Fine to Medium Grain <br />6.5-8.0 <br />Silty Sand, Light Brown, <br />SM <br />Fine to Medium Grain <br />1.5.4 Discussion of Soil Lithology <br />The soils encountered in the percolation test borings consisted generally of silty sand in the upper <br />3 feet and poorly graded sand with silt from 3 feet to 8.0 feet. Refer to Table 5 for more detailed <br />lithology. Generally, coarser -grained soil has a greater potential for percolation than fine-grained <br />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 />Three percolation tests were performed. <br />1.6.3 Boring Preparation and Presaturation <br />The percolation test borings were excavated on December 20, 2021. Approximately two inches <br />of "pea gravel" was placed in the bottom of P1-3'; two inches of "pea gravel" was placed at the <br />bottom of P2-3.5' and two inches of "pea gravel" was added to boring P3-8.0'. A 2.0 -inch diameter <br />PVC pipe with perforations towards the bottom was installed on top of the gravel and the annular <br />space was backfilled with "pea gravel". Presaturation of the percolation test holes occurred the <br />same day approximately 24 hours prior to the day of testing. The depth of water used to pre-soak <br />the borings was approximately 6 inches to 1.0 foot above the top of the gravel. <br />1.6.4 Condition of Borings after Presaturation <br />All borings were dry and intact after the 24-hour pre-soak period. <br />Responsive ■ Resourceful ■ Reliable 10 <br />