contaminant source Articles
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Application of library-independent microbial source tracking methods for identifying the sources of faecal contamination in coastal areas
Faecal contamination sources were identified in coastal areas around the Guerande-Atlantique peninsula using two microbial source tracking (MST) methods: (i) Bacteroidales host-specific 16S rRNA gene markers measured by real-time PCR and (ii) F-specific bacteriophage (FRNAPH) genotyping. Both methods were used on 63 water samples from 7 water courses. HF183 marker and bacteriophage genogroup II ...
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Statewide souce water assessment
Client: Kansas Department of Health & Environment Completion Date: June 2003 Services Provided Program management Internet tool development GIS with data file integration Education Recruitment Training Public involvement Source water assessments Project Summary Burns & McDonnell served as the project administrator for the Kansas Source Water Assessment Program. ...
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Key Contaminant Analysis Techniques
Contaminant analysis is critically important across a range of industries, ensuring that the end product is of safe, high quality for the consumer. Contamination can lead to a huge disruption to production or distribution and the appropriate analytical techniques need to be applied so that a fast resolution can be found. Contaminant analysis techniques aim to identify contamination sources ...
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Source identification of fecal contamination in the canals in Bangkok using fecal sterol compounds
This study aims to apply fecal sterols as a chemical indicator to track feces contamination sources in the canals in Bangkok. The sewage and canal sediments were examined during the dry season. Fecal sterols in the canals were evaluated over a one-year period (2011–2012) for the selected sterol compounds. Several factors including season, canal water levels, rainfall data, and sewage were ...
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Assessing ongoing sources of dissolved‐phase polychlorinated biphenyls in a contaminated stream
Few studies assess the potential of ongoing sources of “fresh” polychlorinated biphenyls (PCBs) to aquatic systems when direct discharge to the environment has been eliminated. In the present study, the authors used single‐layered, low‐density polyethylene samplers (PEs) to measure total PCB concentrations, congener profiles, and enantiomeric fractions (EFs) in a contaminated stream and to ...
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Comparative microbial source tracking methods for identification of fecal contamination sources at Sunnyside Beach in the Toronto region area of concern
Several beaches within the Toronto region area of concern have persistent issues with fecal contamination, causing a beach beneficial use impairment (BUI). In this study, Escherichia coli, including ampicillin-resistant strains, were enumerated via culturable and quantitative polymerase chain reaction (qPCR) methods. Microbial source tracking (MST) markers (for general Bacteroidales, human, ...
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A novel genetic marker for the rapid detection of
Bacteroides fragilis in recreational water as a human-specific faecal indicatorBacteroides spp. has gained substantial interest among the suggested potential candidates for alternative faecal indicators for untreated recreational waters by the US EPA. Interest in Bacteroides as a faecal indicator is based upon the relative abundance of selected members of the Bacteroides genus in the human colon and human faeces. In this study, we developed a real-time PCR detection system ...
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Seattle, WA - Active chemical distribution facility - Case Study
Guaranteed Remediation of TCE and PCE under Active Facility Project Summary TRS Group, Inc. (TRS) working with FLOYD|SNIDER a local Seattle consulting firm, completed a guaranteed fixed price remediation (GFPR) of tetrachloroethene (PCE) and trichloroethene (TCE) in soil at an active bulk chemical warehouse and distribution facility in Seattle, Washington. This contaminant source area ...
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John Deere uses hose reels
Deere and Company has had a long standing policy to improve energy efficiency and air quality in their facilities. Each of the facilities has unique challenges based on the processes and product manufactured. John Deere Harvester Works (East Moline, IL) manufactures combines. The physical size of the combine presents many unique problems for source capture of the fumes created. The majority of ...
By Monoxivent
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Chlorinated Solven - ART In-well Air Stripping Technology, MN - Case Study
Accelerated Remediation Technologies, LLC (ART) was secured by a major uniform services company to provide remediation technology at a PCE site in Minneapolis. Contaminant concentrations had reached asymptotic levels and were significantly higher than defined action levels. ART worked with the client's consultant to install the ART Technology in the most contaminated source area location. Within ...
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Spring Could Bring Problems To Septic Systems
Because many regions of the US have had a very tough winter this year, it is possible that spring may bring some problems to septic systems and their owners. The speedy melting of snow and some spring rains, may cause runoff from septic systems, which could contaminate other water sources or areas. For more information check out this article: http://www.lakenormanseptic.com/category/blog/ ...
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Sources of pharmaceuticals and personal care products in swimming pools
Pharmaceuticals and personal care products (PPCPs) in swimming pool water are hypothesized to originate from fill water and anthropogenic sources like urine, sweat, swimwear and body surfaces. However, research exploring PPCP origins in pools is lacking. This research investigates PPCP sources at 31 swimming pools. Pool water was analyzed for 24 representative PPCPs using advanced liquid ...
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Influence of a chlor‐alkali Superfund site on mercury bioaccumulation in periphyton and Low‐trophic level fauna
In Berlin, NH, the Androscoggin River flows adjacent to a former chlor‐alkali facility that is a US EPA Superfund site and source of mercury (Hg) to the river. A study was conducted to determine the fate and bioaccumulation of methylmercury (MeHg) to lower trophic‐level taxa in the river. Surface sediment directly adjacent to the source showed significantly elevated MeHg (10–40x increase, ...
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STS Simulates Ludlum 43-9 Counting probe
STS is working on its first simulation of the Ludlum 43-9 Alpha counting probe head. The probe has a slide drawer to place sample swabs in that have been used to swab a surface with the STS LS1 simulant applied to it. The probe is based on a real Ludlum housing with the STS detection system built into it, the US based customer is going to use the probe with the STS simulated Ludlum 177 meter ...
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Hydrodynamic modelling and forecasting of microbial water quality in a drinking water source
Faecal contamination often enters drinking water sources through emergency discharges, which occur as a result of technical malfunctions or a hydraulic overload of the sewer system during periods of heavy rain. In October–November 2012, several emergency discharges entered Lake Rådasjön – a drinking water source for Gothenburg, Sweden. To describe and forecast the ...
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Water contamination - Types, sources, effects, solutions
Access to clean and safe water is a basic human right, but many communities face the challenge of lacking water, resulting in serious health risks, environmental impacts, and economic consequences. According to the United Nations, up to 1 in 4 people does not have access to safe drinking water. Out of those, a significant percent resort to using unsafe water. When water is considered unsafe to ...
By LG Sonic
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Municipal wastewater treatment plants as pathogen removal systems and as a contamination source of noroviruses and
Enterococcus faecalis Municipal wastewater treatment plants play a crucial role in reducing the microbial and pathogen load of human wastes before the end-products are discharged to surface waters (final effluent) or land spread (biosolids). This study investigated the occurrence frequency of noroviruses, Enterococcus faecalis and Enterococcus faecium in influent, final effluent and biosolids from four secondary ...
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Overview of solid waste management in economically developing countries
Recently, protection of public health and of the environment by utilizing proper methods for the management of municipal solid wastes is gaining importance in economically developing countries (DCs). Inefficient collection methods, insufficient coverage of the collection system, combined with improper disposal of municipal solid wastes and contaminated sources of water supply, are major threats ...
By ORBIT e.V.
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Ensuring Contamination Control in Clean Manufacturing Environments with Airborne Molecular Contamination Monitoring info@
Abstract In clean manufacturing environments, two aspects of molecular contamination need to be understood: (1) the background levels of contamination existing under stable conditions, and (2) the elevated concentrations that occur during contamination events. A new approach to monitoring both aspects of molecular contamination is presented. Recent technical advances have made it feasible to ...
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