Commercial Remediation Services
CommTank’s remediation professionals provide the
experience, technical capabilities, and operational expertise to
manage both small and large-scale environmental projects. Our technical
and operations staff provides result-oriented systems and programs,
incorporating both off-site removal and on-site treatment as needed.
Below is a list of our services and capabilities:
- Emergency Response Service
- Free Product Recovery
- Soil Excavation
- Mobile Drilling
- In Situ Chemical Oxidation (ISCO)
- Soil Vapor Extraction
- Air Sparging
- Bioslurping
- Bioremediation
- Surfactant Enhanced Aquifer Remediation (SEAR)
- Pump and Treatment Systems for Contaminated Groundwater
When considering the application of different treatment technologies,
our environmental team in coordination with your LSP will first
consider the goals of remediation (e.g. removal, separation, containment,
destruction). Once the goals are established, the team will consider
technologies or groups of technologies to meet these goals. In many
cases, multiple technologies are required to remediate an entire
site. Several treatment processes are combined to meet the varying
requirements of the contaminants affecting the site. The following
are a few of the treatment technologies that we employ.
Pump and Treatment Systems
The dual bed system is a packaged system consisting of one clay/coal
adsorber and two carbon adsorbers that can be configured in series
or in parallel, depending upon the facility requirements. This is
the most common type of system that we use and each unit can be
customized to meet the flow requirements of the site.
In-Situ Soil Vapor Extraction
Soil vapor extraction (SVE) removes volatile organic compounds
from a soil matrix. Air drawn through a soil matrix by a vacuum
pump removes contaminated soil gas and induces additional volatile
compounds to vaporize. Contaminants are drawn out of the soil with
the exiting air and uncontaminated air is drawn in to repeat the
process. The most common system is trailer-based which generates
sufficient vacuum to influence a large area. We also provide smaller
vacuum systems for areas where storage space is a concern or access
to the contamination is difficult (typically in basements).
Air Sparging
Air Sparging is an in-situ process in which air is bubbled through
a contaminated aquifer to remove volatile contaminants. Injected
air bubbles move vertically and horizontally in the soil creating
an underground air stripping process that removes contaminants through
volatilization. The most common air sparging process injects air
into the groundwater through injection wells. Volatile compounds
that are exposed to the sparged air convert to gas phase. Once in
gas phase the volatiles either migrate to the ground surface or
are captured via a soil vapor extraction system.
Chemical Oxidation
Chemical oxidation technology is based on the oxidative properties
of specific chemicals. Through the process of oxidation, groundwater
contaminants are ultimately broken down into carbon dioxide and
water. To effectively degrade contaminants, the oxidant must come
into contact with the contaminant molecules. Ideally, the delivery
technique would ensure that the oxidant is evenly dispersed throughout
the area to be treated. Chemical oxidation is a proven method of
on-site contamination destruction and when used in conjunction with
site excavation and water treatment systems it can accelerate site
cleanup times.
Ozone Sparging
Ozone used in site remediation is similar to other chemical oxidation
techniques. The use of ozone differs from most oxidation processes
because you can deliver more continuous oxidation instead of batch
applications. Ozone is extremely effective in treating many groundwater
pollutants including total petroleum hydrocarbons (TPH). When compared
to other chemical oxidation methods, ozone can treat an area in
a shorter amount of time and the storage and transportation of dangerous
liquids is eliminated.
Bioremediation
Anaerobic bioremediation utilizes biological processes to break
down or destroy contaminants. Enhanced anaerobic bioremediation
aids in speeding up these processes and achieves a higher degree
of chemical destruction. Bioremediation can be applied to achieve
source reduction or plume-wide treatment, and it may be possible
to complete the remedy in as little as 2 or 3 years. But for difficult
sites (e.g., DNAPL source areas), it may be advantageous to combine
enhanced anaerobic bioremediation with other remedial strategies
or measures. The single largest difference between conventional
remedial technologies and enhanced bioremediation may be that enhanced
bioremediation, if properly implemented, can maintain effectiveness
over a longer period of time at a lower overall cost.
Bioslurping
Bioslurping is used to remediate soils contaminated by petroleum
hydrocarbons. It is a cost-effective in situ remedial technology
that simultaneously accomplishes LNAPL removal and soil remediation
in the vadose zone, by removing LNAPL, then drawing contaminated
soil-gas vapor from the ground. Bioventing of vadose zone soils
is achieved by drawing air into the soil due to withdrawing soil
gas via the recovery well. The system is designed to minimize environmental
discharge of ground water and soil gas. When free-product removal
activities are completed, the bioslurping system is easily converted
to a conventional bioventing system to complete the remediation. |
