water sampling laboratory Articles
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Measuring Light Gas Condensate with TD-560
Oil concentration in water can be measured using many different methods. Local government regulations usually require a specific laboratory method, which is difficult to perform in the field. Each method used will demonstrate a different sensitivity and bias to the hydrocarbon mixture that makes the oil. Additionally, only under controlled conditions will two water samples have the same oil ...
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A New Field Method for Enumerating Viable Legionella And Total Heterotrophic Aerobic Bacteria
Presentation at the 2007 Association of Water Technologies Convention and Exposition ABSTRACT A new field method for the quantitative determination of viable Legionella and total heterotrophic aerobic bacteria was evaluated in hundreds of laboratory experiments and from analysis of over two thousand field samplers in actual operating conditions. The method has been proven reliable for ...
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Bacteriological assessment of aquifer storage and recovery (ASR) water in southwest coastal Bangladesh
Safe drinking water is scarce in southwest coastal Bangladesh. Harvested rainwater and rain-fed pond water are the main sources of drinking water for people living in this area. Both government and non-government organizations are promoting aquifer storage and recovery (ASR) schemes to provide safe drinking water for this population. This study assessed the bacteriological quality of both ...
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Development of a regression model to predict copper toxicity to Daphnia magna and site‐specific copper criteria across multiple surface‐water drainages in an arid landscape
The water effect ratio (WER) procedure developed by the U.S. Environmental Protection Agency is commonly used to derive site‐specific criteria (SSC) for point‐source metal discharges into perennial waters. However, experience is limited with this method in ephemeral and intermittent systems typical of arid climates. This study presents a regression model to develop WER‐based SSC for a network ...
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Evaluation of an MPN test for the rapid enumeration of
Pseudomonas aeruginosa in hospital watersIn this study, the performance of a new most probable number (MPN) test (Pseudalert®/Quanti-Tray®) for the enumeration of Pseudomonas aeruginosa from hospital waters was compared with both international and national membrane filtration-based culture methods for P. aeruginosa: ISO 16266:2006 and UK The Microbiology of Drinking Water – Part 8 (MoDW Part 8), which both use ...
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Industrial Site Central, Indiana - Case Study
Site Description Chlorinated solvents were found in soil and around water beneath a drum storage area at a manufacturing facility in central Indiana. The contamination was mainly found in the uppermost occurrence of ground water in an intratill silty sand formation. Within this zone the contamination had spread to cover an area of approximately 3,500 square ...
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Rapid and specific detection of
Salmonella in water samples using real-time PCR and High Resolution Melt (HRM) curve analysisA real-time PCR assay combined with a pre-enrichment step for the specific and rapid detection of Salmonella in water samples is described. Following amplification of the invA gene target, High Resolution Melt (HRM) curve analysis was used to discriminate between products formed and to positively identify invA amplification. The real-time PCR assay was evaluated for specificity and sensitivity. ...
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Method for outlier detection: a tool to assess the consistency between laboratory data and ultraviolet–visible absorbance spectra in wastewater samples
Reliable estimations of the evolution of water quality parameters by using in situ technologies make it possible to follow the operation of a wastewater treatment plant (WWTP), as well as improving the understanding and control of the operation, especially in the detection of disturbances. However, ultraviolet (UV)–Vis sensors have to be calibrated by means of a local fingerprint ...
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‘
Hom ’: a simple point of use water treatment deviceThis study sought to explore a locally assembled ‘Hom’ point of use water treatment device by assessing aspects of its performance and possible effects of using it on compliant households and communities. The conceptual framework highlights poverty and environmental degradation as causes and consequences of one another, with ill-health caused by water-borne diseases reinforcing both to form a ...
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Monitoring once through cooling water - Case study
The Situation Power plants and paper mills use service water loops and mill water loops respectively for the cooling of lubricating, hydraulic, turbine and transformer oil. These cooling systems feature large, recirculating volumes of water which are treated with biocides, dispersants, and corrosion inhibitors. By comparison, refineries often use once through cooling water systems. The cooling ...
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Water Quality Sensors
Background Water is the source of life, human life and production activities can not do without water. The quality of drinking water is closely related to human health. Water quality monitoring and control has become an important subject of modern science. The on-line water quality monitoring system can accurately, timely and comprehensively reflect the current water quality and development ...
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Sustainable wastewater treatment chemicals in a dairy
Problem/Definition Atana Ltd has been tasked in reducing sludge generation produced at the sites effluent plant by introducing a new chemical regime. This would bring considerable savings on their daily running costs; reduce the need for hazardous substances and prevent any corrosive issues through the removal of inorganic chemicals. The plant also has consent issues with FOG and Suspended ...
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AquaLab Analyzer provides real-time phosphorus measurement in Everglades
When it comes to ecosystem sustainability, Florida is no backwater. The South Florida Water Management District, which includes the unique Everglades habitat, had a major challenge. The EPA and various governmental authorities have defined limits for many water quality parameters to support a water body’s designated use. Any physical, chemical or biological condition that threatens the designated ...
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DE HSCA Environmental Standards
The Delaware Hazardous Substance Cleanup Act (HSCA): DE HSCA Environmental Standards & Regulations The Delaware Hazardous Substance Cleanup Act (DE HSCA Environmental Standards) environmental standards for risk assessment, clean-up, and remediation planning for polluted sites are determined by the DNREC Division of Waste and Hazardous Substances. These standards enable DNREC to oversee the ...
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Helium shortage
Helium is well known as Helium that makes balloons and airships float and in its liquid form, Helium is used in a variety of applications including cooling for magnets in Magnetic Resonance Imaging (MRI) scanners, cooling infrared detectors, and as a superconductor coolant in the large hadron collider at CERN. Helium is distilled from natural gas deposits that have collected in the presence of ...
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Alternative solutions to Helium
Hydrogen generators offers a number of advantages to Helium for gas chromatography including lower cost, availability through electrolysis of water, and improved sampling speed. Helium is well known as Helium that makes balloons and airships float and in its liquid form, Helium is used in a variety of applications including cooling for magnets in Magnetic Resonance Imaging (MRI) scanners, ...
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ITRC technical regulatory guidelines for passive diffusion sampling, 2004
Polyethylene diffusion bag (PDB) samplers are low-density polyethylene bags containing deionized water, used to collect water samples in groundwater wells for laboratory analyses of volatile organic compounds (VOCs). PDB samplers are passive devices, relying on the movement of groundwater from the aquifer or water-bearing zone through the screen or open interval of a well. VOCs in groundwater ...
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Nitrate Monitoring Simplifies Drinking Water Management
Nitrate in source water can be challenging to manage and lead to potential non-compliance issues. Continuous monitoring of nitrate enables you to keep a real-time pulse on nitrate concentrations from source water to finished water, offering many benefits: Compliance with drinking water standards for nitrate Optimized blending ratios to maximize water use Efficient nitrate treatment with ion ...
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Groundwater Nitrate Monitoring Applications
Nitrate in source water can be challenging to manage and lead to potential non-compliance issues. Continuous monitoring of nitrate enables you to keep a real-time pulse on nitrate concentrations from source water to finished water, offering many benefits: Compliance with drinking water standards for nitrate Optimized blending ratios to maximize water use Efficient nitrate treatment with ion ...
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IAQ investigators often overlook Bacteria as the Root Cause of Occupant Complaints
Untitled Document Many investigators have been dealing with mold issues the last few years and may have been overlooking bacteria as the underlying microbial problem. Bacteria typically outnumber fungi in the indoor air and may also account for foul odor problems. Bacterial contamination of HVAC systems has also been linked to hypersensitivity pneumonitis in building occupants. ...
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