For the "Do It Yourselfer"
Vapor Monitoring Probes / Implants
H&P Mobile GeoChemistry, Inc. vapor monitoring probes consist of small diameter (either 1/8" OD or ¼" OD) inert nylaflow tubing with a perforated tip at the bottom (refer to attached figures). The nylaflow tubing allows for seamless installation to depths of hundreds of feet and low internal dead volumes for easy sampling. Vapor probes can be emplaced using hand augers, hand soil vapor equipment, direct-push systems, or down the open flights of hollow stem and percussion drilling rigs.
Several choices of perforated tips are available including stainless steel screens, slotted PVC pipe, aluminum or ceramic tips. The tube and tip are emplaced to the target depth, buried with 4 to 12 inches of sand, and then sealed to the surface with bentonite. The small tubing enables multiple tubes to be buried in the same borehole when vertical vapor gradients are desired ("nested vapor wells").
The surface end of the vapor tube is capped with a gas-tight Swagelok nut & cap or with a gas-tight valve as desired. The vapor probe is terminated at the surface with a variety of completions, such as locking well-covers.
Vapor Monitoring Probe Installation & Sampling Kit
H&P Mobile GeoChemistry, Inc. can send you a complete kit containing instructions and all required supplies for installing and sampling vapor monitoring probes.
Call H&P Mobile GeoChemistry at 800-834-9888
or e-mail us at ladams@handpmg.com
Installation of Vapor Probes
(click photos to enlarge)
Installing of Vapor Probe using Hand Equipment.
Installed Vapor Probe prior to Drive Rod Removal.
(Note Sampling Syringe)
Sealing the Vapor Probe after Drive Rod Removal.
The Completed Vapor Probe.
Sampling the Vapor Probe.
(Note 3-Way Valve on End)
Sampling the Vapor Probe with 60cc Gas-Tight Syringe.
On-Site Analysis in Mobile Lab Equipped with
GC/MS for VOCs and GC for Oxygen & Carbon Dioxide
Data Processing in Mobile Lab gives Real-Time Results.
Diagrams of Soil Vapor Probes
