The main characteristics of EGH-Pest are the same as EWH-Pest, they differ only in size. The size of EGH-Pest is 30cm x 5 cm.
EGV - Exposmeter GroundwaterVOC
EGV provides a cost-saving alternative to conventional sampling methodologies, eliminating well purging and decreasing field labor costs. They provide depth-specific, time-weighted samples of dissolved phase VOCs.
EGV is based on PDB (Polyethylene Diffusion Bag) technology developed by Don Vroblecky of USGS and Thomas Hyde of General Electrical. For more extensive information on PDBs please visit internet training material website