Retract-A-Tip was designed as a survey tool for the collection of discrete soil gas samples. It is used with GVP extensions, sampling tubing, & slide hammer attachment, or any electric rotary hammer with suitable adapter. The hardened stainless steel tip is designed to open when the extensions are pulled back a few inches.
In the open position, the Retract-A-Tip will allow the collection of a soil gas sample when vacuum is applied to the sample delivery tube. This may be repeated at different depths for as many samples as needed. The Retract-A-Tip can also be used with a PID or FID by connecting a water trap to the sample delivery tube & apply a vacuum to the other side of the trap, to obtain a direct reading of the contaminant level.