If you need to gather samples beneath a concrete pad, this carbide bit can drill a hole large enough to allow a ESP Plus Sampling Tube to pass through.
The JMC Environmental Fate Sampler takes a 6 inch diameter by 2 inch deep sample. Compatible with the JMC Environmentalist Sub-Soil Probe or any hydraulic soil probe, it maximizes recovery of surface applied chemicals on day zero and greatly reduces surface contamination risk to subsequent samples.
Replacement part. Sandwiched between lower end of sampling tube and cutting tip. Directs flow of soil into the liner. Without it, clay samples have a tendency to crumple the plastic liners.