source sampling Articles
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Spatiotemporal distribution of nitrogen and phosphorus in alpine lakes in the Sanjiangyuan Region of the Tibetan Plateau
To provide a theoretical basis for alpine source lake protection, ten samples were taken from each lake annually from 2012 to 2015. Each year, the various species of nitrogen and phosphorus nutrients were measured. The average contents of nitrate nitrogen, ammonia nitrogen, nitrite nitrogen, total phosphorus, and total nitrogen in the four lakes are 0.195–0.0 mg/L, 0.038–0.143 mg/L, ...
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Assessment of the PAHs contamination threat on groundwater: a case study of the Niger Delta region of Nigeria
Contamination of the environment by polynuclear aromatic hydrocarbon (PAHs) is becoming a rising environmental concern. The interest this subject attracts has continually increased by the day because of the threat these compounds pose to human health. Water samples from several hand-dug wells in the Niger Delta region of Nigeria where extensive crude oil production activities take place were ...
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Feed Water Delivery System Audit Using 2 nd Gen eration ATP - Case Study
Background A Western Canadian oil producer utilized LuminUltra's Quench-Gone Aqueous (QGA) test kit to perform an audit of its feed water delivery system. The site acquired water from underground brackish water wells and transported this water through a 5 kilometer pipeline to the site. Water was then stored in a large tank prior to being sent to the process. The goal of the site audit was to ...
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Case study: Cuyama
ESTR Overview Consultant: EDD Neighborhood: Suburb Heating Tubes: 36 Target Temp: 200 ˚C Heating Period: 45 Days Target: Destruction Rate Efficiency: > 90% Contaminant: Petroleum Hydrocarbons Geology: High TOC, Silts, and Sands Ex Situ Thermal Desorption was used to successfully treat TPH-d and TPH-g from a former AST spill site in Central California. Affected soils were ...
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Groundwater Plume, Source and Risk Identification Using Passive Soil Gas
Abstract The results from sixty passive soil gas (PSG) samplers placed at a grain silo and mixed-use industrial facility with a known chlorinated solvent release aided with the rapid investigation time-schedule. The samplers were used to determine potential sources, plume extent and vapor risks in areas beyond the previous discrete soil sampling and permanent groundwater monitoring well network. ...
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Dewesoft on European test bench for large launcher solid propellant boosters - Case Study
The thrust of the booster is around 4650 kN. Thunder strikes the rainforest; the noise is deafening. The deep rocky drench at the foot of the launch tower is forcefully filled with large clouds of fire and smoke. The trees along the edges are swaying heavily. It is only fired for 135 seconds, but the power of the solid rocket motor is overwhelming. P120C, the motor tested measures 13.5 meters ...
By DEWESoft
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Best Practices: Sample Planning for Quantitative NIR Methods
The focus of this post is NIR project and sample planning, a critical step in the NIR method development process that often gets rushed through in the eagerness to have our NIR instruments pump out measurement results. Putting some extra effort in sample planning could pay off big dividends in terms of two things I suspect are really important to you – accuracy and robustness. So, ...
By BUCHI
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Resistance patterns of
Escherichia coli isolated from sewage sludge in comparison with those isolated from human patients in 2000 and 2009For some time now, antibiotic-resistant bacterial strains have been found in the human population, in foods, in livestock and wild animals, as well as in surface waters. The entry of antibiotics and resistant bacterial strains into the environment plays an important role in the spread of antibiotic resistance. The goal of the present study was to monitor the entry of antibiotic resistances into ...
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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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Radon-222 from different sources of water and the assessment of health hazard
Water samples collected from different sources were analysed for radon concentrations in order to evaluate the health effect associated with radon in water. The radon concentrations were in the range of 3.56–98.57, 0.88–25.49, 0.73–1.35 and 0.24–1.03 Bq.L−1 for borehole, well, packaged and utility water, respectively. Samples from boreholes had the highest radon concentrations with about 67% ...
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TOC Analysis of Bottled Water Using the Fusion UV/Persulfate TOC Analyzer
Abstract This application note demonstrates the Teledyne Tekmar Fusion UV/Persulfate analyzer’s ability to measure low levels of TOC in five popular bottled water brands. Bottled water samples varied in source and purification methods including: two natural aquifers, one vapor distilled, one reverse osmosis, and one two-stage microfiltration/UV light disinfection. All results had a 10% ...
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Microbial source tracking of private well water samples across at-risk regions in southern Ontario and analysis of traditional fecal indicator bacteria assays including culture and qPCR
Many people living in rural areas rely on privately owned wells as their primary source of drinking water. These water sources are at risk for fecal contamination of human, wildlife, and livestock origin. While traditional bacteriological testing involves culture-based methods, microbial source tracking (MST) assays present an opportunity to additionally determine the source of fecal ...
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Tipping Back an “Interesting” Pint
How about a nice tall glass of ice-cold beer… made from recycled sewage water? Did you hesitate? Well, now let’s think about it: most breweries use some combination of hops, malted barley, yeast, and…. well… clean water! But beer from recycled wastewater? That’s exactly what took place March 19-10 at the 2017 WateReuse California Annual Conference in San Diego. ...
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Groundwater: Low-flow Purging and Sampling
Significant timesavings, improved sample process integrity, quality assurance and minimal quantities of potentially contaminated purge water to manage - are attractive as the focus on groundwater quality sharpens and economics demand best cost-benefit based methods Water has become a vitally important resource. Maintaining its quality and quantity and avoiding pollution are set to be watched ...
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Groundwater Monitoring with the Waterra Inertial Pump
Untitled Document Abstract The Waterra Inertial Pump has been available for use in narrow diameter monitoring wells for several years. This device offers many advantages over other types of sampling equipment. Since this pump operates via a principle not used by any other type of device and is commonly constructed of materials not widely used in field sampling, some ...
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Building Services Management - Air Sampling -
Untitled Document Maintenance professionals are often the first responders to mold complaints in their facilities. building occupants can be exposed to fungal (mold) spores through direct contact with contaminated uilding materials and contents. More commonly, exposure occurs by inhalation of spores found in reathable air spaces. Air monitoring or sampling may be a valuable ...
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Low-Flow (Minimal Drawdown) Ground-Water Sampling Procedures
Untitled Document Background The Regional Superfund Ground Water Forum is a group of ground-water scientists, representing EPA's Regional Superfund Offices, organized to exchange information related to ground-water remediation at Superfund sites. One of the major concerns of the Forum is the sampling of ground water to support site assessment and remedial performance ...
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