The drill rig sets up on a residential lot near the Thames River, its tripod hoist ready to drive the 63.5 kg hammer. The SPT in Chatham-Kent follows CSA A23.2-9A / CSA A23.2-9A / CSA A23.2-9A / CSA A23.2-9A / CSA A23.2-9A / ASTM D1586 precisely: a standard split-spoon sampler is driven 450 mm into the soil, and the blow count for the final 300 mm is recorded as N-value. In our experience, this method works well across the region's glaciolacustrine deposits — from stiff clay till near Ridgetown to loose sands along the Lake Erie shoreline. We coordinate with local utilities before each test to avoid buried infrastructure, and we log each 1.5-meter interval with the driller's notes on groundwater seepage.
In Chatham-Kent, the SPT N-values in the upper clay till typically range from 8 to 18 blows per foot, reflecting the medium-stiff consistency left by glacial deposition.