RemQuest recently implemented 102,300 gallons of EZVI at five separate locations across the United States. The VOCs treated included TCE, PCE, Carbon Tetrachloride and daughter products. The injections for the first three projects were completed using a hybrid technology in highly permeable soils. The fourth injection took place at an industrial facility in the northeastern United States in a tight clay formation using hydraulic fracturing technology.
37,500 gallons of EZVI were implemented at an active Department of Defense facility in the southeastern United States in late 2010. The main contaminant of concern was TCE with groundwater concentrations up to 300 ppm. Electron donor material was also provided by RemQuest for biostimulation in dissolved plume areas of this site. Post injection monitoring of this site is currently being conducted.
30,000 gallons of EZVI were implemented at a private industrial chemical facility in the northwestern United States in late 2010 to address a known, historical, CVOC source area. PCE, Carbon Tetrachloride and daughter products were the targeted contaminants. Total CVOC concentration reductions of ~ 90% have been measured in monitoring wells located within the injection area or source area (within 3 months of implementation). Monitoring at this site continues to date.
6,400 gallons of EZVI were implemented at an active Department of Defense facility in the southeastern United States in mid 2011. TCE was the targeted contaminant, with concentrations as high as 350 ppm. Post injection monitoring has not been conducted.
3,500 gallons of EZVI were implemented as a pilot scale project at an active industrial facility in the northeastern United States in September 2011. The targeted contaminants were TCE and daughter products in a tight clay formation in the subsurface. Full scale implementation is anticipated to take place in early 2012. Post injection monitoring has not been conducted.
24,900 gallons of EZVI were implemented at an active Department of Defense facility early in the first quarter of 2012. TCE was the main contaminant of concern with concentrations approaching 300 ppm. 76,500 gallons of electron donor material was also supplied by RemQuest to stimulate naturally occurring biological processes in the dissolved plume. Post injection monitoring has not yet been conducted.
RemQuest recently implemented an Engineered Phytoremediation℠ pilot study (EnPhySys℠) at an active chemical facility on the west coast of the United States. The plantation consists of 80 trees, including 13 different species. The purpose of the pilot study is to evaluate and select a species of tree(s) to hydraulically control groundwater at the site. The trees were planted in closed bottom TreeWell® units with metered water supplies. The observed transpiration rates and viability of the various species of trees will be used to design a full scale Engineered Phytoremediation℠ system to affect hydraulic control of groundwater.