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Geotechnical Report of Subsurface Investigation <br />LA3642 SCE LAVETA SUB CS (LA23642A) <br />Job Number: 24125796 <br /> <br /> <br />April 29, 2024│6 <br />Foundations Recommendations <br />The following recommendations are made based on our review of the test boring data and our past <br />experience with similar projects and subsurface conditions. Ultimate soil strength parameters are <br />presented on table below. <br />Ultimate Strength Parameters <br />Boring <br /># <br />Depth <br />(ft) <br />Unified Soil <br />Classification <br />Total Unit <br />Weight <br />(pcf) <br />Friction <br />Angle <br />(degrees) <br />Cohesion <br />(psf) <br />B-1 <br />0.0 – 3.0 SM 120 30 -- <br />3.0 – 5.0 SM 120 30 -- <br />5.0 – 9.0 SM 125 30 -- <br />9.0 – 12.0 SM 125 32 -- <br />12.0 – 20.0 SM 130 38 -- <br />20.0 – 27.0 SM 130 38 -- <br />27.0 – 32.0 PWR 130 38 -- <br />32.0 – 37.0 SM 130 38 -- <br />37.0 – 51.5 PWR 130 38 <br />1. Groundwater was not encountered at the time of drilling . <br />Based on the subsurface conditions and typical design foundation loads for similar monopole <br />towers, we recommend that either a caisson (drilled shaft) or a pad/pier be used to support the new <br />tower. <br /> <br />2210 3%4 N Grand Ave Unit# <br />WCC01 - 1011184045/30/2024