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Soil Suitability/ Nitrate Loading Study <br />Lease Property ■ Acampo, California <br />December 17, 2021 Terracon Project No. NA217090 <br />Ircerr on <br />Boring <br />Depth Interval (ft) <br />Soil Type <br />Unified Soil <br />Classification <br />Lean clay, slightly <br />5-6 <br />cemented, tan and brown <br />CL <br />mottled, dry <br />6.7 <br />Lean clay, tan, slightly <br />CL <br />cemented, dry <br />Lean clay with sand, light <br />7-9 <br />tan, slightly cemented, <br />CL <br />dry <br />9_1$ <br />Clayey silt, light tan, <br />MH <br />cementation varies, dry <br />18-19 <br />Clayey silt, light tan, very <br />MH <br />cemented, dry <br />19-20 <br />Clayey silt, tan, <br />MH <br />cemented, dry <br />Clayey silt, tan, <br />20-21 <br />cemented, dry. Drill auger <br />MH <br />refusal. Borings collapsed <br />to 18 feet bgs. <br />Silty sand, fine, dark <br />B3 — 2.25 <br />0-2.25 <br />brown, moist. Handauger <br />SM <br />refusal. <br />1.5.4 Discussion of Soil Lithology <br />The soils encountered in our soil borings consisted primarily of lean clay, silty sand, and/or sandy <br />silt in the upper 3.5 feet and clay silt with varying cementation from 3.5 feet to 21 feet bgs. <br />Generally speaking, coarse-grained soil has a greater potential for percolation than fine-grained <br />or cemented soil. <br />Terracon searched the DWR online Well Completion Records for additional information regarding <br />soil lithology near the site. A well completion report was available for the adjoining address of <br />2885 Stoney Creek Circle. Soils were reported as from 0 to 3 feet bgs, hardpan from 3 to 5 feet <br />bgs, clay from 5 to 20 feet bgs, sand from 20 to 25 feet bgs, and stratified layers of sand and clay <br />from 25 to 220 feet bgs. Static water level was reported at 74 feet bgs. <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 />Responsive ■ Resourceful ■ Reliable 10 <br />