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Veco Design Studio <br />June 3, 2024 <br />Project 10112-04 <br />Page 6 <br /> <br /> <br />Test Pit No. Sample Depth <br />(ft) <br />Soil <br />Description <br />Expansion <br />Index <br />Expansion <br />Potential <br />TP-1 0-2.0 Sandy SILT 8 Very Low <br /> <br />4.2 Sulfate Content <br /> <br />A representative soil sample was analyzed for its sulphate content in accordance <br />with California Test Method CA417. The results are given below: <br /> <br />Test Pit No. Sample Depth <br />(ft) Soil Description Sulphate Content <br />(%) <br />TP-1 0-2.0 Sandy SILT 0.0220 <br /> <br />5. CONCLUSIONS AND RECOMMENDATIONS <br /> <br />5.1 General <br /> <br />a) It is our opinion that the site will be suitable for the proposed development <br />from a geotechnical aspect, assuming that our recommendations are <br />implemented during construction. <br /> <br />b) We are of the opinion that the proposed ADU may be supported on the <br />new footings founded in the competent soils. <br /> <br />c) We are also of the opinion that with due and reasonable precautions, the <br />proposed construction will not endanger adjacent property nor will <br />construction be affected adversely by adjoining property. <br /> <br />d) The earthwork operations should be observed by a representative of a <br />geotechnical engineer. <br /> <br />e) The design recommendations in the report should be reviewed during the <br />grading phase when soil conditions in the excavations become exposed. <br /> <br />5.2 Grading <br /> <br />5.2.1 Processing of On-Site Soils <br /> <br />a) At this time, no overexcavation is required below the bottom of the <br />footings, provided the footings are founded in the existing <br />competent soils anticipated to be below 18 inches. <br />