Tag Archives: In Situ Thermal Remediation

Bench Scale Thermal Treatment of 1,4-Dioxane

1,4-Dioxane (not to be confused with dioxin…although we also can certainly thermally treat that! See our updates from the Danang Vietnam project) is an industrial chemical widely used as a chemical stabilizer for chlorinated solvents. It is of environmental concern due to its classification as a probable human carcinogen coupled with its unique chemical properties such as high water solubility (and therefore high subsurface mobility in groundwater), low octanol-water partition coefficient (log Kow), and relative resistance to biodegradation [1]. Due to these properties, 1,4-dioxane is often present on the leading edge of a contaminant plume in groundwater and presents unique … 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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Leading Experts to Share Valuable, Firsthand Knowledge & Lessons Learned about Implementing Thermal Remediation in the State of New Jersey – Join Us!

Recently, TerraTherm has been working with the New Jersey Licensed Site Remediation Professionals Association (LSRPA) to bring you an informative and educational workshop entitled, “Application of Thermal Remediation in New Jersey.” By attending this four hour workshop, you can earn 3.5 continuing education credits (CEC’s). You will learn directly from leading experts in the remediation industry, who will share their comprehensive knowledge about the application of thermal remediation technologies within the state of New Jersey. You will have the opportunity to hear an end user’s perspective, get the inside scoop on important lessons learned, and gain useful insights and perspectives … Continue reading

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2015 Remediation Workshops – Come and Join Us!

Looking for a way to stay updated on the latest remediation technologies and network with other professionals in the industry, but cannot commit to a traditional three day conference far from home? TerraTherm, a supporter and Gold Sponsor of Remediation Workshops, will be hosting three workshops this year across the United States. The first one will be held on February 3rd in Los Angeles, CA. There will also be one in Milwaukee, WI on October 1st, and another in Boston, MA on November 4th. The workshops will feature educational presentations from remediation industry professionals on various subjects and the opportunity … 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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Steam Injection Helps – How do we know when to use it?

The subsurface is complex – it may have layers of sand, silt and clay, and some layers have groundwater while others do not. When chemicals are spilled they move down into the subsurface via the paths of least resistance, contaminating all the zones they pass through. So when the distribution of materials and chemicals into the subsurface is this complex, would you think that one heating technology would fit all sites? TerraTherm’s answer is “of course not!” One has to first understand the site well, and then determine the best way to heat a site and how to best extract … 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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