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.
Already have a Bosch 11316 Percussion Hammer or a Bosch 11245 Rotary Hammer or a Bosch RH1255VC Rotary Hammer? Then all you need is this adapter for your JMC Environmentalist's Sub-Soil Probe PLUS.