AMS Sub-Slab Gas Vapor Probe (GVP) Kits sample for volatile organic compounds (VOCs) and other soil gases from beneath a building's floor slab during vapor-intrusion investigations. Each kit installs a semi-permanent sampling point that sits flush with the top of the slab so it won't interfere with daily use of the space, and it can be re-sampled over time to track potential vapor-intrusion risk.

The Basic Kit includes a stainless steel 3" implant, rubber shaft plug, connectors, top plug, hose barb, and a 1/4" x 12" stainless steel tube. The Tamper-Resistant Kit adds a screw-in stainless steel top cap to deter vandalism at unattended sites. The Installation Kit contains everything needed to install up to five permanent sampling points — five implant sets with tamper-resistant caps, a mini stainless ball-valve adapter, SDS-Max masonry and core bits, a screwdriver, and a tee-handle Allen wrench.

Replacement implants, tubes, plugs, and top caps are stocked — see Parts & Accessories.