We recently supervised a six-story apartment project near Fremont's Lake Elizabeth. The geotechnical consultant needed reliable N-values to design shallow foundations on the alluvial deposits common in this area. That's where the SPT (Standard Penetration Test) became essential. In our experience, this test delivers the most cost-effective profile of soil resistance and stratigraphy for sites along the Mission Peak foothills. We pair it with a granulometry analysis when the sand-silt ratio affects bearing capacity. Every blow count is recorded per ASTM D1586-18 standards, giving engineers a direct read on density and consistency.
Blow counts in Fremont often range from 8 to 35 in native alluvium, but loose fills can drop to 4 blows per foot.