Anaheim sits on the Santa Ana River floodplain. That means variable alluvial deposits. We see clay, sand, and gravel layers in the same borehole. A uniform soil profile is rare here. That makes factor of safety calculation critical. Our team runs direct shear and triaxial tests on undisturbed samples. We combine those results with site-specific groundwater data. Before we finalize any FS value, we cross-check against local experience. For granular layers we also run a MASW survey to capture vs30/" data-interlink="1">shear wave velocity profiles. That data feeds directly into the seismic component of the safety factor. Every calculation follows ASCE 7-22 load combinations. We do not guess. We test, model, and verify.
Anaheim's alluvial soils and seasonal water table swings mean FS values must be verified per layer, not averaged across the site.