soil gas Articles

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How is biodiesel produced?

by National Alternative Fuels Training Consortium (NAFTC)  (Jun. 30, 2016)

This article is the first in a series that will take a close look at alternative fuels production and source materials. Over the next several months, we will cover natural gas, propane, ethanol, hydrogen, and fuel cells. This month, we will focus on biodiesel. Methods for creating fuels from renewable biomass feedstocks have been used since the ...

Impact of Sampling Media on Soil Gas Measurements

by Eurofins Air Toxics Inc  (Sep. 1, 2006)

Abstract To evaluate the vapor intrusion pathway for a building and to assess the associated human health risks, soil gas samples near the building site and under the building foundation may be collected. In order to meet risk assessment goals, the analytical laboratory is often required to report compounds of concern for these soil gas samples ...

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 ...

Soil Fracturing

by Federal Remediation Technologies Roundtable  (Jan. 1, 1997)

Introduction Fracturing is an enhancement technology designed to increase the efficiency of other in situ technologies in difficult soil conditions. The fracturing extends and enlarges existing fissures and introduces new fractures, primarily in the horizontal direction. When fracturing has been completed, the formation is then subjected to vapor ...

Off-Gas Treatment Technologies for Soil Vapor Extraction Systems: State of the Practice

by US EPA - Environmental Protection Agency  (Jun. 1, 2006)

Untitled Document EXECUTIVE SUMMARY This document provides state-of-the-practice information on off-gas treatment technologies for soil vapor extraction ...

Phosphorus and greenhouse gas dynamics in a drained calcareous wetland soil in Minnesota

by Soil Science Society of America  (Aug. 24, 2009)

Received for publication September 15, 2008. Restoration of wetland hydrology can produce ecological benefits but may have unintended consequences. We examined effects of altered water level on release of dissolved reactive phosphorus (DRP) and greenhouse gases (GHG) in soil cores from a marsh being evaluated for restoration. We also measured ...

Groundwater Plume, Source and Risk Identification Using Passive Soil Gas

by Beacon Environmental Services, Inc.  (May 19, 2008)

Abstract The results from sixty passive soil gas (PSG) samplers placed at a grain silo and mixed-use industrial facility with a known chlorinated solvent release aided with the rapid investigation time-schedule. The samplers were used to determine potential sources, plume extent and vapor risks in areas beyond the previous discrete soil sampling ...

The Measurement of Gas Bubble Size Distributions in a Three Phase Laboratory Gassy Soil

by ASTM International  (Mar. 1, 1988)

The technique developed can be used to measure the total void, gas void, or particle size distribution in both gassy and saturated sediments provided the void spaces, or particles, can be approximated to spheres. Here the technique is demonstrated for measuring gas bubble size distribution in a reconstituted estuarine silty clay, which has been ...

Greenhouse gas emissions and global warming potential of reclaimed forest and grassland soils

by Soil Science Society of America  (Mar. 1, 2009)

Received for publication June 19, 2008. Although greenhouse gas (GHG) emissions from soils are important, reclaimed mine soil (RMS) ecosystems are not widely assessed. Postreclamation land uses (forest, hay, and pasture) were investigated to: (i) monitor the magnitude of GHG fluxes, (ii) estimate their global warming potential (GWP), (iii) ...

Soil CO2 Flux Measurements -- Using the LI-8100 System to Collect Air Samples for Estimating Soil Trace Gas Flux

by LI-COR  (Jan. 1, 2006)

Air samples can be collected from the same air stream used to measure soil CO2 flux with the LI-8100 Automated Soil CO2 Flux System, for estimating the flux of trace gas, such as methane (CH4), ammonia (NH3), nitrous oxide (N2O), isotopic species, etc. This application note describes a simple method for obtaining air samples from the ...

Contaminated soil remediation - Inverurie

by Soilutions Ltd  (Oct. 23, 2012)

Remove Contaminated Soil from Residential Gardens & Re-Landscape Client: MTM Construction Consultant: WA Fairhurst and Partners Challenge: Advise on the removal of contaminated material from a residential area built on a former town gas site. Reinstate existing landscaping. Applied ...

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 ...

Detection of pentachlorophenol in soil

MATRIX: Soil ANALYTES: Pentachlorophenol (PCP) RANGE OF DETECTION: 100 ppb to 10 ppm MATERIALS: Pentachlorophenol RaPID AssayÒ kit and Sample Diluent Reagents: methanol (reagent grade), sodium hydroxide (ACS grade), distilled or deionized water. Equipment: reciprocating shaker, plastic bottles (polypropylene or ...

Soil Vapor Extraction (In Situ)

by Federal Remediation Technologies Roundtable  (Jan. 1, 1997)

Introduction Soil vapor extraction (SVE) is an in situ unsaturated (vadose) zone soil remediation technology in which a vacuum is applied to the soil to induce the controlled flow of air and remove volatile and some semivolatile contaminants from the soil. The gas leaving the soil may be treated to recover or destroy the contaminants, depending ...

Chemical Impregnation of Cohesionless Soils

by ASTM International  (Sep. 1, 1989)

Existing methods to obtain and test high-quality undisturbed samples of cohesionless soil below the water table depend at some stage on freezing. This limits the range of application to relatively clean sands, and even for those soils the freezing operation is delicate, time-consuming, and costly. Moreover, there is no direct way to check, ...

Remediation Of MTBE Contaminated Soil And Groundwater

by QED Environmental Systems  (Jan. 1, 1998)

Methyl tertiary-butyl ether (MTBE) is a fuel additive made, in part, from natural gas. Since 1979, it has been used in the United States as an octane enhancing replacement for lead, primarily in midand high-grade gasoline at concentrations as high as 8 percent (by volume). Since the mid-1980s, it has been widely used throughout the country for ...

Hydrocarbon contaminated soil remediation - Fife

by Soilutions Ltd  (Oct. 23, 2012)

Removal of Contaminated Soils from Residential Gardens & Re-Landscape Cient: Local Authority, Central Belt of Scotland Consultant: RPS Plc. Challenge: Remove contaminated material from the garden areas of houses built upon a former town gas site. Reinstate existing landscaping. Applied ...

Oxygen Uptake of Soil and Compost Samples

by Challenge Technology  (Jan. 1, 2003)

Oxygen Uptake of Soil and Compost Samples The Challenge AER-200 aerobic/anaerobic respirometer is ideally suited to determine in-situ rates of oxygen uptake in soil or compost samples – as may occur in the upper layers of soil under natural atmospheric conditions or in mixed compost reactors. This objective is accomplished by using a ...

Trailer Mounted Afterburner for Soil Remediation

by Epcon Industrial Systems, LP  (Sep. 17, 2013)

The Problem A major Vapor & Odor Control company needed a portable solution to clean the soil leftover at old fuel stations. The Process Soil Remediation Afterburners & Oxidizers are manufactured to treat soil containing contaminates such as petroleum hydrocarbons, with diesel oil, gasoline, aromatic hydrocarbons, solvents and many ...

Soil baked to clean up contamination...

by Nelson Environmental Remediation Ltd.  (Nov. 20, 2008)

Can an old drill site be cleaned up without adding truckloads of contaminated soil to the landfill? Chevron Canada will be using a technology called thermal desorption to clean up a site located 13 kilometres southwest of Pincher Creek. Leif Sollid, spokesman for Chevron, who is the operator of the site, said they considered two options for the ...

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