Contaminated Sites Articles

  • In-Situ Treatment - Funnel & Gate System - Case Study

    Problem An asphalt testing facility, in operation for many years, closed in the early 1990s. A subsequent environmental assessment revealed that an underground storage tank, used to hold common cleaning/degreasing solvent for use during testing, had developed a leak and had to be abandoned. The storage tank and soil in the immediate vicinity was removed as the first step to remediate ...


    By C3 Environmental Limited

  • Curtailing Contamination Hydrocarbon Engineering July 2017

    During planned shutdowns, the equipment in refineries and petrochemical plants has to be checked. The downtime can require several weeks when tanks, vessels, distillation columns, and pipes have to be drained and cleaned for i   maintenance or repair. Shutdowns are labour-intensive and require accurate scheduling and organisation between all projects, as often hundreds of workers are ...


    By Kurita

  • Protecting against cross-contamination

    Protecting product from cross-contamination is critical, especially when it comes to seed and pulse crops. Your conveyance is where the risk for contamination is usually at its highest. This necessitates constant clean-out measures that take up valuable time and are less than cost-effective. Here at Norstar, we believe that chain conveyance provides a well-balanced solution to the issue of ...


    By Norstar Industries

  • Microbiological contamination of water pans in Baringo County

    Water pans constitute the main source of rural water supply in Baringo County. This study sought to assess the spatial-temporal variation of total coliforms, Escherichia coli, Fecal streptococcus and Salmonella species in the water pans. A sanitary survey was conducted to observe the potential sources of microbial contamination on the water pans. Water was ...


    By IWA Publishing

  • `Standards are desperately needed for plastic and pesticide contamination in soil´

    In addition to plastic in the oceans, plastic contamination in arable land throughout Europe and other parts of the world is a growing problem. No standards exist for these types of soil pollutants, nor for pesticide residues or their degradation products. For this reason, Professor Violette Geissen is calling for standards to be implemented. On 15 June, Geissen will deliver her inaugural address ...

  • Case study - Ozone sparging closure of an industrial VOC spill site adjacent to a water supply well site

    Description An undocumented surface spill at an active manufacturing facility located adjacent to a public water supply well field released chlorinated volatile organic compounds (PCE, and its breakdown products: TCE, c-DCE, and VC) into soils and groundwater.  The driver for site cleanup was three water supply wells located 200 feet downgradient of the site bounds.  The chosen ...

  • Case study - Rapid removal of chloroethenes at industrial sites

    Description Air sparging with trenches had failed to remove groundwater and soil contamination at an industrial Superfund site in Piedmont soils in South Carolina.  The major contaminants of concern were cis 1,2-dichloroethene (DCE) and trichloroethene (TCE) ranging from 0.5 to 2.0 mg/L.  The treatment area was approximately 15,000 square feet. Ozone sparging was ...

  • Understanding the 3 Types of Arsenic Removal Used for Wastewater

    With the onset of the Industrial Revolution and the development of internal combustion engines and new manufacturing technologies, fresh water became an essential raw material not only for production, but for cooling purposes in manufacturing processes. However, when fresh water is used in an industrial process, it creates industrial wastewater composed of a variety of chemicals and other raw ...

  • Salting icy roads affects water supplies

    It’s basic chemistry: Saline water’s freezing point is much lower than fresh water’s, which can help keep ice from forming on roads. To reduce winter accidents, municipal and state workers often apply salt and other compounds to icy roads, because if not accidents start to happen and people end up in need cash in emergency. Unfortunately, this may have unintended consequences ...


    By Fluence Corporation

  • Case study - Kitsap transit avoids two engine failures in three months with on-site oil analysis

    Kitsap Transit is a public transportation agency, based in Bremerton, Washington and serving the county of Kitsap, which operates routed bus service, foot ferry service and service for elderly and disabled passengers. The agency has long been concerned with preventing engine failures and optimizing maintenance schedules for its fleet of approximately 362 pieces of equipment including transit ...


    By Spectro Scientific

  • Adsorption of arsenic from drinking water using natural orange waste: kinetics and fluidized bed column studies

    The biosorption potential of orange waste (OW) was investigated using synthetic solutions of arsenic and contaminated drinking water under different parameters, e.g. biosorbent dose, initial concentrations of solution, contact time, and pH in a batch system. The optimum conditions were identified as a contact time of 30 minutes, pH 6, biosorbent dose of 1 g L−1, and initial arsenic ...


    By IWA Publishing

  • E-Z Trays selected for Large scale project - Case Study

    A former industrial plant and top Superfund site in Sydney, Australia, had been in operation since the 1930s and contained chlorinated solvent contamination. Because of the size and scope of this project packed towers traditionally would have been the air stripping method of choice, but the client was concerned about the ability of workers having easy access to maintain and clean the units. They ...


    By QED Environmental Systems

  • UXO discrimination using time domain electromagnetic induction

    Introduction An explosive ordnance is a munition that is either launched or fired with the intent of detonation at a specified target. An unexploded ordnance (UXO) is an explosive ordnance that, due to some malfunction, remains undetonated. As a result, the ordnance can be found at the ground surface, partially buried, or buried at a depth of up to 8 m beneath the surface. Practical and ...


    By Geonics Limited

  • European Retail Gasoline Site - Case Study

    ABSTRACT BOS 200® successfully remediated petroleum hydrocarbon impacts at an active retail petroleum facility in Europe, achieving the remediation goal of eliminating vertical migration of impacted groundwater to competent limestone aquifer underlain the site. CHALLENGES Site characterization activities following the release identified residual ...

  • Real Tech Inc Brochure

    For over a decade, our vision has remained the same: To improve access to water quality monitoring through the development of practical and affordable solutions.  Our comprehensive product solutions provide rapid and accurate detection of contaminants, such as organics and nitrates while maintaining ease of use and cost effectiveness.  With thousands of clients in 45 countries around ...


    By Real Tech Inc.

  • Spatial distribution of heavy metals in groundwaters and health risks associated in the Ntem watershed, Yaoundé, Cameroon

    The present study was aimed at bridging the gaps in the knowledge concerning heavy metals (Pb, Cd, Cr, Ni, Zn, Cu, Mn and Fe) concentrations in the groundwaters of the Ntem watershed in Yaoundé. Representative groundwater samples (25 numbers) were collected from five hand-dug wells, and their metal concentrations were assessed as per standard procedures, and deterministic interpolation ...


    By IWA Publishing

  • The Importance of Deployable Morgues for Disaster Sites

    Natural disasters of all types and intensity carry risk of fatalities. Even minor inclement weather scenarios can have tragic effects and loss of life. Deployable morgues fill a critical need within effective medical care operations at disaster sites. Disaster response planning should always include these systems in order to manage deceased victims respectfully, efficiently, and without putting ...


    By Blu-Med Response Systems

  • Anti-fungal compounds: emerging environmental contaminants

    Azole fungicides are active ingredients in a range of pharmaceutical and personal care products, and are also used in agriculture. This study reviewed the sources, presence and risks of these compounds in the environment, finding evidence of toxic effects on aquatic organisms. The researchers provide directions for future research and warn caution should be exercised until more toxicity data ...

  • The Phase 1 Environmental Assessment

    In today’s world where every property is subject to potential environmental risks a Phase 1 Environmental Site Assessment or ESA is an appropriate action to take. An ESA can help determine if the property has been contaminated by previous or current activities. The ESA can help protect the purchaser of a property from environmental risks prior to the closing on a property.  Lenders ...

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