soil venting Articles

  • Venting your Sewage Treatment System

    The venting for the BIOROCK Sewage Treatment System is probably the key point of the system. The venting is specific to your site; again, why we emphasize the service of a certified recommended installer to install the BIOROCK Sewage Treatment Plant correctly. BIOROCK Venting Guidelines However, there are some simple tricks to follow in order that the continuous draft of air necessary to ...


    By BIOROCK S.à.r.l

  • Soil Vapor Extraction (In Situ)

    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 on local and state air discharge regulations. ...

  • Bioremediating Explosives Contaminated Soil

    From the beginning of World War II until the 1970s, the site that is now the Naval Surface Warfare Center in Crane, Indiana (NSWC-Crane) was the home of a major bomb manufacturing operation. Explosive compounds such as TNT, Royal Demolition Explosives (RDX) and Her Majesty’s Explosive (HMX) were handled loose and drifted through air vents. Often, the material settled on the roofs of buildings, ...


    By BioCycle Magazine

  • Mitigating methane emissions from passive landfill vents: a viable option for older closed landfills

    This study investigated the use of biofilters to reduce methane emissions from landfill passive gas vents. Two biofilter designs were evaluated. The two filter designs achieved similar percent oxidation averages. The radial biofilter design, however, obtained a much higher methane oxidation rate. The higher surface area of flow in the radial biofilters decreased the methane influx leading to ...


    By Inderscience Publishers

  • Thermally Enhanced Soil Vapor Extraction

    Introduction Thermally enhanced SVE is a full-scale technology that uses electrical resistance/electromagnetic/fiber optic/radio frequency heating or hot-air/steam injection to increase the volatilization rate of semi-volatiles and facilitate extraction. Thermally enhanced SVE is normally a short- to medium-term technology. Electrical Resistance Heating Electrical resistance heating uses ...

  • Common Treatment Technologies for Fuels in Soil, Sediment, and Sludge

    Common treatment technologies for fuels in soil, sediment, and sludge include biodegradation, incineration, SVE, and low temperature thermal desorption. Incineration is typically used when chlorinated SVOCs are also present with fuel, and not specified for fuel-only contaminated soil, sediment, or sludge. All types of biodegradation, both in situ or ex situ, can be used to remediate soils: ...

  • Ex Situ Biological Treatment for Soil, Sediment, and Sludge

    The main advantage of ex situ treatment is that it generally requires shorter time periods than in situ treatment, and there is more certainty about the uniformity of treatment because of the ability to homogenize, screen, and continuously mix the soil. However, ex situ treatment requires excavation of soils, leading to increased costs and engineering for equipment, possible permitting, and ...

  • Case Study - Full Scale Remediation of Trichloroethene and Benzene, Toluene, Ethyl Benzene, Xylene (BTEX) in Soil Using Six Phase Soil Heating - Niagara Falls, NY

    Contracting: Fixed Price Per Task Contaminants Treated: Trichloroethene (TCE), Benzene, Toluene, Ethyl Benzene, Xylene (BTEX) Technology Applied: Six-Phase Soil Heating (SPSH) Geology: Sediments, glacial till, bedrock Hydrology: Groundwater at 8 feet below ground surface (bgs) Hydraulic Conductivity: 3 x 10-4 cm/sec Treatment Area & Volume: 12,100 square feet & 4,480 cubic ...


    By TRS Group, Inc.

  • Greenhouse gas fluxes in an eastern corn belt soil: Weather, Nitrogen source, and rotation

    Relative contributions of diverse, managed ecosystems to greenhouse gases are not completely documented. This study was conducted to estimate soil surface fluxes of carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) as affected by management practices and weather. Gas fluxes were measured by vented, static chambers in Drummer and Raub soil series during two growing seasons. Treatments ...

  • In-situ moisture content measurement of landfill cover using Time Domain Reflectometry

    The amount of methane that vent from landfills is dependent on the physical, chemical and biological components of the soil cover; moisture content and temperature of the soil being the major controlling factors. Previous studies have attempted to correlate moisture content and temperature with methane emission by collecting soil samples from landfill soil covers and analysing it in the ...


    By Inderscience Publishers

  • Superior voc protection for project situated on former railroad site case study

    Project: Smith Performing Arts Center Location: Las Vegas, NV Products: Liquid Boot Gas Vapor Mitigation System, GeoVent™ Gas Venting System, Ultraseal Waterproofing System Background: Vapor intrusion has become a significant environmental issue for regulators, industry leaders, and concerned residents nationwide. The ...


    By CETCO

  • Gas vapor mitigation system utilizing evoh technology as solution to TCE contamination case study

    Project: El Centro Regional Medical Clinic Location: El Centre CA Products: Liquid Boot PLUS Gas Vapor Mitigation System with VI-20™ Geomembrane GeoVent™ Gas Venting System Background: Prior land use was for "El Centra Motors", an automobile dealership and service facility. There was some contamination in the soil ...


    By CETCO

  • High-performance geomembranemth evoh technology part of gas vapor mitigation solution case study

    Project: Chik-Fil-A Location: Fort Worth, TX Products: Liquid Boot PLUS Gas Vapor Mitigation System with VI-20™ Geomembrane GeoVent™ Gas Venting System Background: The owner of the former manufacturing site and the engineer understood the value of having a barrier with superior vapor resistance and a long standing ...


    By CETCO

  • Corpus Christi, Texas - excavation; open-hole chemical oxidation

    When a motorist struck the drop hose of a fuel tanker making a delivery at this Corpus Christi, Texas convenience store, about 250 gallons of gasoline flowed across the surface to a grass area where it soaked into the ground. The sidewalk and a natural gas pipeline prevented local cleanup crews from removing all of the contamination immediately after the spill. Over a period of several weeks, the ...

  • Spray-applied gas membrane system instrumental in methane mitigation at Playa Vista

    The Playa Vista development, located near Marina Del Rey, California, has drawn political opposition over land-use issues and building safety concerns dating back to the 1990’s, which continued through the project’s inception in 2001. At the heart of the public safety concern was naturally occurring methane gas, which is known to be explosive if allowed to accumulate in confined ...


    By CETCO

  • Sea Power 101: Award Winning Bioremediation Solution

    Case Study: Gasworks, Chertsey At the 2008 Brownfield Briefing Remediation Innovation Awards, Tamdown won ‘Best Use of a Single Remediation Technique’ for their treatment of a former gasworks in Surrey using Sea Power 101. Applied to vented biopiles housed in large poly tunnels, Tamdown were able to treat and re-use 3,250 tonnes of contaminated soil. ...


    By Sea-Chem Limited

  • Outstanding bioremediation in winter months case study

    Alga Power 101 was again able to prove its efficacy when it was utilized on a former industrial site in West Thurrock, Essex, under some extremely challenging conditions. Formerly a scrapyard, the contaminated site was heavily laden with diesel and other fuels. Prior to treatment the TPH of the soil ranged between 8,000mg/kg and 10,000mg/kg. Bioremediation took place between November and December ...


    By A Alga Companhia Limited

  • Enviro - Septic® Systems Achieve Even Distribution without Pressure Dosing

    Abstract: Enviro-Septic Systems do not use pressure distribution. Pumps are used only if necessary to gain elevation to the treatment field. Pressure distribution has the potential to disrupt the settling of solids within the pipe. Testing has confirmed that Enviro-Septic^ achieves even distribution throughout the system naturally, through the development of a controlled bacterial treatment layer ...

  • Prominant developer chooses cetco gas vapor barrier for chromium protection case study

    Project: Droyers Point Location: Jersey City, NJ Products: Liquid Boot® Gas Vapor Mitigation System Background: During the summer of 2004, construction commenced on a multi-family housing plan, developed by K. Hovnanian Homes. This 23-acre Brownfield redevelopment project included 30 new three-story townhouse buildings ...


    By CETCO

  • The potential for health risks from intrusion of contaminants into the distribution system from pressure transients

    The potential for public health risks associated with intrusion of contaminants into water supply distribution systems resulting from transient low or negative pressures is assessed. It is shown that transient pressure events occur in distribution systems; that during these negative pressure events pipeline leaks provide a potential portal for entry of groundwater into treated drinking water; and ...


    By IWA Publishing

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