MAI's Helium Shroud design has the following capabilities:
- Borehole seal integrity. Surface air intrusion can be checked in real-time, so that sampling can be aborted if desired.
- Shrould can be used with MAI supplied purge can, user supplied vacuum pump or a manual syringe.
- Shut-in-test for leak free manifold verification.
- Quantitative measurement of Helium content within shroud, which, combined with lab analysis of Helium content in the sample can, allows quantitative evaluation of a leak with the DTSC <5% criteria.
- MAI supplies Chromatography grade Helium (99.995%)
- Rota meter and vacuum guages allow assessment of DTSC defined low permeability soils and provides the needed flow/vacuum measurements required for compliant sampling.
- The special design of MAI's sampling manifolds offer the option for split sampling upon request. Simultaneous duplicate TO15, sequential TO15 followed by TO17 sorbent tube (ST), or simultaneous sampling of a borehole at 2 different depths.
- Sample technician friendly. Allows flood or trickle/maintenance Helium input. Allows visual monitoring of shroud Helium content.
- Lightweight, compact and easy to move from borehole to borehold.
| Soil Vapor Field Data Sheet | Excel |
Complete Helium Shroud Assembly
