The following is a list of common technologies and methods we have implemented.
Pump and Treat
InControl Technologies has designed and implemented numerous groundwater extraction systems for remediating sites such as dry-cleaning facilities, petroleum storage tank sites, terminals, pipelines, and chemical facilities. Groundwater extraction systems employ a variety of technologies including electrical and pneumatic pumps, product skimming, and in-well separation. Our remediation systems include treatment options such as activated carbon, air strippers and product separation.
Soil Vapor Extraction
While not a common technology in the Houston area, InControl Technologies has implemented soil vapor extraction technologies at several dry cleaning sites to remove perchloroethylene from soils. The soils just below the concrete slab of the buildings tend to be highly permeable; therefore, this technology has been highly successful in reducing source area concentrations to safe levels according to State of Texas standards. The effectiveness of soil vapor extraction is primarily limited to the nature and extent of the impacts in the shallow soil layer. In addition, we treat the off gas from the soil vapor extraction with activated carbon.
Dual-Phase High-Vacuum Extraction
Due to the low permeability soils commonly encountered in the Houston area, standard groundwater extraction technologies, such as pump and treat, are not cost-effective alternatives considering the extreme timeline required to achieve target cleanup goals. Therefore, InControl Technologies utilizes dual-phase high-vacuum extraction to improve recoverability of the contaminants. Typically, the high-vacuum extraction system is coupled with a variety of vapor-phase treatment options including: activated carbon, regenerative carbon, or thermal oxidation. InControl Technologies designs and installs the systems, varying the sizes from small mobile mounted units for short term programs, to large-scale fully automated units.
As one of the latest advanced technologies for remediating halogenated organic compounds, including various chlorinated solvents, InControl Technologies has developed and implemented this technology at several dry cleaning operations. Chemical oxidation is a cost-effective alternative to many of the previously identified options. On the project site, chemicals are injected directly into the subsurface to react with organic chemicals. Chemical oxidation reduces the higher concentration material while at the same time producing an oxygen rich groundwater zone. This is an ideal environment for selective strains of microbes to continue to successfully degrade chlorinated solvents under aerobic conditions.
Ex-situ and In-situ Soil Treatment
Through this alternative technology, soil additives are applied to reduce chemical concentrations in soil prior to disposal or to reduce the in-place concentration to meet site cleanup goals. InControl Technologies has used this option to remove the toxicity characteristic from various hazardous soils, which significantly reduced the cost of disposal; ex-situ and in-situ soil treatment is an alternative cost-effective option at our smaller project sites.
Monitored Natural Attenuation
Although this method is often construed as a passively observational technology, the criteria required to demonstrate its applicability is quite complex and comprehensive. InControl Technologies has developed numerous effective monitored natural attenuation programs for both chlorinated and non-chlorinated organic compounds. Proper establishment of a cost-effective testing regime is the most critical aspect of the monitored natural attenuation program. Poorly designed programs lead to excessive costs or erroneous demonstration of the process.
Enhanced Natural Attenuation
This technology differs from monitored natural attenuation in that nutrient is added to the formation to promote microbial growth in the formation, or provide the necessary mechanism to complete the biodegradation process. Technologies evaluated and implemented throughout the process include the use of hydrogen and oxygen releasing compounds and hydrogen gas sparging.