Soil & Groundwater E-Zine
October 2010
This Month´s Featured Articles, Papers & Reports
EZVI: A New Technology for DNAPL Reduction
The EZVI technology is a NASA (National Aeronautics and Space Agency - USA) patented product that has been commercially available as an in-situ dense non-aqueous phase liquid (DNAPL) remediation alternative since 2005. EZVI is an In Situ Reduction Technology (ISCR) based on zero valent Iron. Emulsified Zero-Valent Iron (EZVI) brings together a proven remediation product with an innovative delivery system to treat DNAPL sources and plumes.   EZVI technology capitalizes on the ...
Horizontal Air Sparge Wells Solve Access Limitations beneath Air Field Tarmac
Air Force Base tarmac is a double-edged sword with respect to environmental remediation. Concrete thicker than at commercial airports virtually eliminates infiltration and limits migration of jet fuel constituents in groundwater, but source material in the vadose zone remains indefinitely, extending the life of the groundwater plume. Horizontal air sparge wells are an effective means of addressing both saturated and unsaturated hydrocarbons beneath airport or air field tarmac, but they cannot be ...
Directed Technologies Drilling Incorporated (DTD)
Directed Technologies Drilling (DTD) is the nation's leading contractor for installing horizontal environmental remediation systems. Our focus is on installation of horizontal wells and directional wells for contaminated site cleanup, water resources development, construction dewatering, and related environmental applications. DTD operates across the United States with a fleet of drill rigs capable of small and large projects. We specialize in injection wells, remediation wells, bioremediation wells, air sparge and vapor extraction wells, and groundwater extraction wells. DTD has strong roots in the environmental and geotechnical consulting fields, with all senior managers being experienced, professional geologists or environmental scientists. All projects are managed in the field by personnel experienced in horizontal directional drilling and with a strong background in geology and environmental remediation or water resources development.

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