- Direct-Push Technologies - Fiber Optic Chemical Sensors - Gas
Chromatography - Graphite Furnace Atomic Absorption Spectrometry
- High-Resolution Site Characterization (HRSC) - Infrared
Spectroscopy - Laser-Induced Fluorescence - Mass Flux - Mass
Spectrometry - Open Path Technologies - Passive (no purge)
Samplers - Test Kits - X-Ray Fluorescence Direct-push platforms
have gained widespread acceptance in the environmental industry
over the past decade because of their versatility, relatively
low cost, and mobility. Direct-push units use hydraulic pressure
to advance sampling devices and geotechnical and analytical
sensors into the subsurface. The weight of the truck in
combination with a hydraulic ram or hammer is used to “push” the
tool string into the ground. In some rigs, vibration is added to
hydraulic pressure to better advance the tools. There are two
sampling modes. One uses a specific tool string that either
performs downhole measurements or gathers a soil or water sample
at a specific depth. In this