soil gas Articles

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Position paper: Accounting for peatland hotspots in the new climate agreement

by Wetlands International  (Nov. 28, 2014)

Introduction Peatlands (~organic soils) worldwide store twice as much carbon as all forest biomass, although they cover only a tenth of the land. The drainage of peatlands, for forestry and agriculture, leads to the oxidation of this carbon and increases their vulnerability to peat fires, leading to huge emissions of greenhouse gases. Hotspots ...

Cuyama Case Study (Ex Situ Gas Thermal Remediation(GTR™))

by GEO Inc  (Oct. 29, 2014)

Ex Situ Thermal Desorption was used to successfully treat TPH-d and TPH-g from a former AST spill site in the agricultural zone in Central California. Affected soils were excavated and then placed “in a pile”, and Gas Thermal Remediation (GTR©) horizontal wells were placed into the pile during its three day construction. The piled ...

Mississauga Case Study (In Situ Gas Thermal Remediation (GTR™))

by GEO Inc  (Oct. 29, 2014)

In Situ Thermal Desorption in conjunction with soil vapor extraction was used to remove volatile organic compounds which contaminated the groundwater and saturated soil areas of a former metal fabricating facility in Ontario, Canada. The site had VOCs detected above the Canadian water standard in various monitoring well locations.  The ...

EPA Region 9 Case Study (In Situ Gas Thermal Remediation (GTR™))

by GEO Inc  (Oct. 29, 2014)

In Situ Thermal Remediation was used to successfully treat benzene, TPH-d, TPH-mo, BaP, and Naphthalene from a former gas plant in EPA Region 9. Gas Thermal Remediation (GTRTM), using Thermal Conductive Heating (TCH), raised the temperature of the soils in the treatment zone of the former MGP site to an average temperature of approximately 325 ...

China Case Study (In Situ Gas Thermal Remediation (GTR™))

by GEO Inc  (Oct. 29, 2014)

Gas Thermal Remediation (GTR™) was recently used to successfully remediate benzene and chlorobenzene impacts in China. This was the first time in situ thermal remediation was used in the history of Chinese remediation efforts. In partnership with JSDDBS, GEO used its Thermal Conductive Heating (TCH) to remove contaminants from soil and ...

Ford Getrag Case Study (In Situ Gas Thermal Remediation (GTR™))

by GEO Inc  (Oct. 29, 2014)

A pilot test preceded the full scale thermal remediation. The subsurface soils were impacted by DNAPL trapped in a layer of motor oil, with levels of Perchloroethylene reaching 60 mg/L. The target treatment zone consisted of a 3000 ft² area to an average depth of 15 ft. Six thermal conduction heating wells and one multi-phase extraction well ...

Deadly Hexavalent Chromium in Soil

by ABCOV Companies  (Aug. 1, 2014)

Merging technologies will change over Hexavalent Chromium in soil to Trivalent Chromium, effectively stopping Hexavalent Chromium from becoming dangerously airborne or becoming even more deadly by migrating into the water table. There are three valences of Chromium: 1) Chromium—safe to humans, 2) Trivalent Chromium—safe and an ...

Redwood City Case (In Situ Gas Thermal Remediation + C3 Technology (GTR™+C3))

by GEO Inc  (Oct. 29, 2014)

The former Dry Cleaner site was located in Redwood City, California, contaminated by tetrachloroethylene (PCE). Affected soils also contained low levels of PCE degradation byproducts, such as trichloroethylene (TCE), and were presumed to have an approximate extent of 384 square feet (16’ x 24’ area) to a depth of 10 feet beneath the ...

Polycyclic Aromatic Hydrocarbons in Soil case study

by Sitelab Corporation  (May 1, 2014)

Save time and money on your next project using Sitelab’s portable UVF-3100D analyzer.  In less than 10 minutes, samples are extracted in solvent and then accurately measured for Target PAHs using Sitelab’s PAH calibration kit.  Detection limits are as low as 50 ppb.  Test results will directly correlate to the sum of ...

Evaluating Leaks in a Soil Gas Sampling Train

by Eurofins Air Toxics Inc  (Sep. 16, 2013)

ABSTRACT The current advisory for active soil gas investigations in California requires leak tests to be conducted at eveiy soil gas probe while taking a sample. A leak may allow ambient ak into the sample train thus diluting the soil gas and underestimating the results. Also, the leak check compound itself may have impurities thereby ...

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