Remediation Services
Etech has proven success in performing all forms of remediation. We understand the importance of financially and technically sound strategies that can be implemented safely and sometimes under tight schedules. In performing hundreds of remediation projects, Etech has developed an outstanding knowledge base in remedial strategies, while continually exploring for new and improved technologies. Etech offers a complete range of services for the treatment, removal, disposal, and restoration of sites with contaminated water and soils. Etech also has a network of disposal options that, where off-site disposal is required, will give you the most efficient and cost effective solution.
Etech knows that every site and every problem is different. Etech’s approach to the selection of a remediation/treatment technique is to first evaluate the site for the amount and extent of contamination and then, utilizing our extensive experience in soil science, geology, climatology, and hydrogeology, we develop a remediation/treatment plan which is specific to your site. We never attempt to fit the remediation problem to, off the shelf – cookie cutter, treatment technologies. Etech’s pledge to our clients is to deliver cost effective and timely remediation technologies. Etech offers a broad range of remediation technologies including the following:
Soil washing has been used for many years to remove inorganic contaminants such as salts and heavy metals from soils. The process is relatively simple. A solvent, in many cases fresh water, is passed over and percolated through the impacted soil dissolving and removing the contaminants from the soil. The solvent containing the dissolved contaminants are then collected and either treated and reused, land applied, or transported for disposal. In some cases additives are used to enhance contaminant solubility. The treatment can be used on-site or, if the correct conditions exist, it can be used beneath the ground surface (in-situ). Etech has designed, constructed, and operated soil washing systems that have successfully removed contaminants from thousands of yards of impacted soil, reducing costs over conventional disposal methods by as much as 40%.
Etech is licensed with the Texas Department of State Health Services to perform assessment and decontamination of sites with Naturally-Occurring Radioactive Material (NORM). Since obtaining this license in 2006, Etech has decontaminated hundreds of NORM contaminated vessels, structures, containments, and impacted soils. Also, Etech has developed a proprietary process which enables us to reduce waste volume from produced water tanks impacted with NORM by as much as 60% compared to conventional disposal methods. Our safety program requires that every one of our staff be trained in NORM safety. In addition, we maintain a full staff of fully trained Radiation Safety Officers and Technicians that are involved in all of the NORM cleanup operations performed by Etech.
SVE is a proven technology often implemented by Etech staff where a vacuum is applied through extraction wells to create a pressure/concentration gradient that induces gas-phase volatiles to diffuse through soil to extraction wells. The process includes a system for handling off-gases. This technology also is known as in situ soil venting, in situ volatilization, enhanced volatilization, or soil vacuum extraction.
Etech has implemented groundwater and vadose zone remediation strategies on hundreds of sites. Strategies implemented include, but are not necessarily limited to:
- Natural Attenuation
- Air Sparging
- Dual-phase Extraction
- Ion-Exchange
- Vapor Extraction
- Steam Stripping
- Ultraviolet Oxidation
- Pump & Treat
- Carbon Treatment