Vapor Detection Articles

  • How can you measure Peracetic Acid separately from Hydrogen peroxide, Isn’t there hydrogen peroxide in PAA?

    We receive questions of this sort frequently and the questioner is partly right. Peracetic acid (PAA) is formed in an equilibrium mixture with hydrogen peroxide and acetic acid, so in a mixture of PAA, hydrogen peroxide and acetic acid, PAA is being continually formed by the reaction of hydrogen peroxide and acetic acid, and peracetic acid is continually breaking down to reform hydrogen peroxide ...


    By ChemDAQ, Inc.

  • Increase Mercury Vapor Detection Range by 10X

    Vapor dilution module extends detection range of J505 from nanograms to milligrams How it works: The new 10:1 dilution module for the J505 reduces the concentration of mercury vapor in the sample stream by a factor of ten, allowing for a much higher detection limit. Rather than the standard upper detection limit of 500 µg/m3, ...


    By Arizona Instrument LLC

  • Variability of GPS water vapor associated with warming activity in Peninsular Malaysia during the period of 2008–2011

    This study utilizes the precipitable water vapor (PWV) parameter retrieved from ground-based global positioning system (GPS) to detect warming activity in Peninsular Malaysia from 2008 to 2011. Daily average of GPS PWV and surface meteorology data taken from six selected stations over Peninsular Malaysia are analyzed. Prior to warming detection, GPS PWV results are compared with PWV obtained ...


    By IWA Publishing

  • Long-term variation of water vapor content and precipitation in the Haihe river basin

    Based on the Haihe river basin National Centers for Environmental Prediction/National Center for Atmospheric Research reanalysis data from 1948 to 2010 and the precipitation data of 53 hydrological stations during 1957–2010, this study analyzed the variation of water vapor content and precipitation, and investigated the correlation between them using several statistical methods. The ...


    By IWA Publishing

  • Correlation and prediction of saline solution properties for their use in mineral processing using artificial neural networks

    Artificial neural networks (ANNs) are applied to correlate and predict physico-chemical, transport and thermodynamic properties of seawater. Values of these properties are needed in the design, simulation and optimization of processes in which seawater is used, mainly in the mining industry. Density, vapor pressure, boiling temperature elevation, specific heat, viscosity, thermal conductivity, ...


    By IWA Publishing

  • FAST-ACT Chemical hazard containment and neutralization system - Technical Report

    ABSTRACT FAST-ACT is a proprietary formulation of non-toxic high-performance specialty materials effective at neutralizing a wide range of toxic chemicals with the added capability to destroy chemical warfare agents. The FAST-ACT formulation is non-flammable, non-corrosive, and significantly reduces both liquid and vapor hazards. Since the dry powder neutralizes threats upon contact, on-site ...


    By Fast-ACT

  • Removal of hexavalent chromium by chemical modification of 4,4′-((1Z,11Z)-2,5,8,11-tetraazadodeca-1,8-diene-1,11-diyl)diphenol: kinetic and equilibrium modeling

    This study aimed to synthesize a new resin through immobilization of the 4,4′-((1Z,11Z)-2,5,8,11-tetraazadodeca-1,8-diene-1,11-diyl)diphenol (TRA) onto silica gel modified (Si-CPTS) with 3-chloropropyltrimethoxy silane (CPTS) and its application for the removal of chromium(VI) ions from aqueous solution as well as from industrial wastewater. The same applications were also made for industrial ...


    By IWA Publishing

  • Locate abandoned production abandoned well case study

    Clearwater, Florida Historical records discovered during construction of a commerical building indicated that a deep well with steel casing was likely present within a portion of the project site. Regulatory officials halted construction and insisted that the presence (or absence) of the well be confirmed. If the well was present, it was required that the well be exposed so that it could ...


    By GeoView, Inc.

  • Coil Coating Case History

    The Customer The Company manufactures metal roofing and gutter systems for the commercial and residential housing industry. The Process Bare coils of recycled steel and aluminum are uncoiled from a roll. The metal is chemically cleaned, treated and rinsed to prepare the surface for optimum coating adhesion and corrosion protection. The coil then enters a ...

  • Energy Savings Case History

    The Customer The Company is a worldwide supplier of thousands of innovative and reliable products to dozens of diverse markets—from automotive to healthcare to renewable energy to electronics. Products include tapes, adhesives, abrasives, films, reflective materials, filtration systems and an array of other products that keep homes clean, offices organized and buildings ...

  • How Close to Contamination does a Property need to be for Vapor Intrusion to be a Concern?

    Cinnaminson, NJ, February 19, 2013 There are numerous sites across North America that have contaminated soil or groundwater due to manmade pollution.  Some of these sites have been a problem for decades and as communities have grown, more and more residential and commercial properties have been built above or near these areas. A major issue for properties built near these contaminated ...


    By EMSL Analytical, Inc.

  • 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

  • CETCO gas vapor barrier chosen by top home builder for site with former oil wells case study

    Project: Palisades at Vista del Verde Location: Yorba Linda, CA Products: Liquid Boot 500 Gas Vapor Mitigation System, GeoVent Gas Venting System Background: The Palisades at Vista del Verde is a multi-family housing development that is situated on a site that once was home to numerous oil wells. The oil wells have since been ...


    By CETCO

  • Spray-applied gas vapor barrier solution for housing development on former landfill site case study

    Project: Fraternity Meadows - Building D Location: Secaucus, NJ Products: Liquid Boot 500 Gas Vapor Mitigation System GeoVent™ Gas Venting System Background: The Fraternity Meadows development is a specialized community project situated on a former landfill with detectable levels of methane gas in the soil. This ...


    By CETCO

  • NJDEP Vapor Intrusion Regulatory Changes: A Breath of Fresh Air

    On January 16, 2013, NJDEP released an update to its Vapor Intrusion Technical Guidance and updated its Vapor Intrusion Screening Levels. Screening levels are notably less stringent for a number of compounds, which have many of our clients sighing in relief.  For example, for tetrachloroethene (“PCE” or “PERC”) the groundwater screening level has been raised from 1 ...

  • How the Best Steam Cleaner Improve Cleaning Operations

    The best steam cleaner equipment from established suppliers can make the most challenging cleaning assignments easy. If you are not satisfied with your present cleaning system, it’s time to change to advanced cleaning machines such as steam cleaners. Places such as kitchens, floors, and bathrooms that look clean and dirt free are often teeming with micro-organisms, bacteria and fungus. It ...


    By Daimer Industries Inc.

  • Excellent Ways to Select the Best Steam Cleaners

    The best steam cleaner equipment from established suppliers can make the most challenging cleaning assignments easy. If you are not satisfied with the cleaning your present cleaning system delivers, it’s time to change to advanced cleaning machines such as steam cleaners. Places such as kitchens, floors, and bathrooms that look clean and dirt free can actually be teeming with ...


    By Daimer Industries Inc.

  • Function 3

    The LeakTracker handset was introduced somewhere in the mid 90's. It was a big deal since it allowed direct read of the instrument reading and saved the technician some typing. It also meant the exact, reading could be captured. It was also supposed to be "cheater proof" by forcing the technician to scan a bar coded tag in order to start the monitoring process. None of these feature by ...


    By InspectionLogic Corporation

  • Field Screening Methods for the Presence of DNAPL, Superfund Site, southern California

    Characterizing the lateral and vertical extent at a Dense Non Aqueous Phase Liquid (DNAPL) impacted site can prove to be a challenging task. Field methods employed to verify the presence of DNAPL have included the use of down-hole Ultraviolet Induced Florescence technologies, the application of down-hole detection materials such as dye impregnated fabrics, and the installation of monitor wells ...


    By Hargis + Associates Inc

  • Vapor intrusion pathway investigation

    The BEACON samplers defined the vapor intrusion of tetrachloroethene and 1,1-dichloroethene, while the Summa canisters (EPA Method TO-15) reported all non-detects. The BEACON survey enabled detection of some chemicals at levels below the Summa canisters practical quantitation limits providing a more complete and realistic vapor intrusion exposure pathway evaluation. Based on the defined vapor ...

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