Tag Archives: modern ISTD site

New Frontiers for In Situ Thermal Remediation: Using High Resolution Site Characterization to Improve Conceptual Site Model Accuracy and Lower Project Costs

As a Cascade Company, one of the major benefits TerraTherm is able to extend to our clients is a whole new suite of capabilities that we now have more readily available to us. These capabilities allow us to better define the target treatment zone (TTZ) and Conceptual Site Models (CSM), enabling us to minimize cost for treatment while ensuring that all of the source material is treated. This not only saves our clients money, but it also limits future liability associated with any missed source materials outside of the TTZ. One of the capabilities we have available to us is an … Continue reading

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World’s Largest In Situ Thermal Desorption Project: Challenges and Solutions

TerraTherm and its In Situ Thermal Desorption (ISTD) sublicense holders have cleaned close to 50 sites, but what happens when we are presented with one that is remarkably large with more than 100,000 cubic yards (76,500 m3) of PCE and TCE rich soils to a depth of over 40 feet (12 m)? The site in particular that was presented to TerraTherm was a former aerospace manufacturing facility and had to be remediated in less than a year. Successfully completed by TerraTherm, this site in Teterboro, New Jersey is now the largest ISTD project to date. The redevelopment of this former … Continue reading

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Lower Explosive Limit (LEL) Monitoring for Estimating Mass Removed

Since 2000, TerraTherm has removed over three million pounds of organic contaminants from the sites we have treated. Many of these sites had yielded too much mass to economically use granular activated carbon as the vapor treatment method. Therefore, we often use thermal oxidizers, using gas and the fuel value of the contaminants to treat the vapors at temperatures of 1500°F (816°C) or higher. The National Fire Protection Agency has mandated continuous monitoring of vapors entering oxidizers when those vapors are expected to be over the 25% Lower Explosive Limit (LEL). Additionally, thermal oxidizers generally have a safe upper operable … Continue reading

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The Road to a Successful Remediation is Paved with Data

Accurate data routinely collected can be the difference between a successfully completed thermal remediation project, and one with extended operations, costing the client money. TerraTherm designs and executes a reliable data collection process during In Situ Thermal Remediation (ISTR) projects that specifically targets key operational data, therefore enhancing system performance, reducing energy consumption, and documenting when project goals are met. Depending on the complexity of a site and the specific remedial objectives, any number of data analyses can be performed, but the quantity and quality of data are paramount. The data are used to create detailed mass and energy balances … Continue reading

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Webinar: In-Pile Thermal Desorption® (IPTD®) for Treatment of POPs-Contaminated Soil and Sediment

In case you missed our last installment of “Inside In Situ Thermal Remediation”, TerraTherm’s informational webinar series, you can find a recorded version here: “In-Pile Thermal Desorption® (IPTD®) for Treatment of POPs-Contaminated Soil and Sediment” Presented by TerraTherm’s Co-Founder, Chairman and Chief Scientist, Ralph S. Baker, Ph.D., this webinar was recorded on September 11th, 2014. Description: Soil or sediment contaminated with Persistent Organic Pollutants (POPs) including PCBs, PAHs, organohaloginated pesticides, Dioxins and Furans and other recalcitrant organics, as well as mercury can be treated effectively at elevated temperatures. By contrast, conventional treatment typically requires excavation and transportation of the soil … Continue reading

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In Situ Thermal Remediation (ISTR) Market Trends

Through recent competitive proposals it has become obvious that the ISTR market is trending towards a more competitive, commodity-style product. While TerraTherm often ranks high on quality and approach, there is an obvious need to reduce base pricing in order to stay competitive for the smaller, more straightforward sites. Tier One Pricing Solution: TerraTherm’s history of uninterrupted success provides an impetus for clients (e.g., Federal, State, and Private) to consider TerraTherm’s Tier One solution for ISTR sites. Tier One offers a simpler and more streamlined In Situ Thermal Desorption (ISTD) project delivery approach, focusing on essential project elements and price … Continue reading

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Operating at an In Situ Thermal Remediation Site

Seeing a TerraTherm site operate is an extraordinary thing. The view of the stack, faithfully discharging clean water vapor into the air, the metallic chirping of In Situ Thermal Desorption (ISTD) heaters oscillating in their well casings, and the low frequency humming of the treatment equipment truly is a unique experience. The principals of subsurface heating with Thermal Conductive Heating (TCH) are simple, but to actually implement this aggressive source zone treatment technology is another thing altogether. It is impressive to think about how quickly a source area can be treated, when something like 15 years ago, the only other … Continue reading

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Thermal Treatment of Fractured Rock – How is it Different?

Fractured rock sites are different – often it is difficult even to determine how deep the Non-Aqueous Phase Liquid (NAPL) has gone, and to define what we refer to as the “source area”. Some sites have NAPL in the fractures, and some have most of the mass trapped in the matrix, into which it has diffused over decades. This blog post discusses the two main challenges: How to decide on the thermal treatment volume without making the problem worse. How to design and implement an effective and safe thermal system. For any aggressive source treatment to be cost-effective, it is … Continue reading

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Bedrock Drilling using Sonic at the SRSNE Superfund Site

The contamination at the Solvents Recovery Service of New England, Inc. (SRSNE) Superfund Site (Site) in Southington, Connecticut is the result of the practices of SRSNE, which began operations in 1955. From approximately 1955 until the facility closed in 1991, spent solvents were received from customers and distilled to remove impurities. Solvents and other wastes were handled and processed by several methods over the operational period, including distillation columns, lagoons, drums, and open pit incineration. Such operations were a source of historical releases of processed materials, solvents and spent fuels, which resulted in the presence of NAPL in the subsurface. … Continue reading

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Eight Misconceptions about Thermal Conduction Heating (TCH) and Electrical Resistance Heating (ERH)

The Internet can be a tricky place. Sometimes when researching, it can become difficult to weed through the piles of information. Through some research of my own, I’ve come to find that there exist a few common misconceptions about thermal technologies. Many companies only practice one method of thermal heating, so it is understandable that misconceptions about another technology arise. TerraTherm on the other hand practices all three of the most accepted and mainstream methods of heating the subsurface: Thermal Conductive Heating (TCH), Electrical Resistance Heating (ERH), and Steam Enhanced Extraction (SEE). This post is meant to clarify misconceptions between … Continue reading

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