low flow sampling Articles

  • 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 ...


    By Geotech

  • Low-Flow (Mininimal Drawndown) Ground-water Sampling

    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 monitoring objectives. This paper is intended to provide ...


    By GeoPump, Inc.

  • Low-Flow (Minimal Drawdown) Ground Water Sampling Procedures

    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 monitoring objectives. This paper is intended to provide ...


    By QED Environmental Systems

  • Low-Flow Purging and Sampling Ground Water - Evolution of Technology and Standards

    The human suffering caused by groundwater contamination has been dramatized in films such as “Erin Brockovich” and “A Civil Action.” Joe Ritchey describes the ASTM standards behind the scenes that help ensure safe drinking water and provide proof of contamination when ...


    By QED Environmental Systems

  • Case study - Low-flow groundwater sampling on a nuclear site

    Nuclear licensed site use of low-flow groundwater sampling shows: Reduced time, reduced quantity of purge water – both thus reducing cost - and reduced risk of operator contact especially with potentially radioactive-contaminated purge water thanks to a self-contained enclosed system. One of the biggest headaches on site is the purge water and the expense of getting rid of it – after ...


    By Geotech

  • Low Flow Groundwater Sampling Using RotaPump Inertial Lift Pump

    This article tells you how to perform low flow groundwater sampling using a portable, surface-mounted pump with no decontamination required before each use and  no chance of cross contamination between wells. An inertial lift pump moves a dedicated (stored in the well) pumping tube rapidly up and down.  A one-way valve on the bottom admits water on the down stroke and ...


    By RotaPump, Inc

  • Low-Flow (Minimal Drawdown) Ground-Water Sampling Procedures

    Untitled Document Background The Regional Superfund Ground Water Forum is a group of ground-water ...


    By Solinst Canada Ltd.

  • Webinar Highlights: Microfluidics for macromolecules

    Hi, I’m Jim Murphy, Principal Consulting Chemist at Waters, and I recently collaborated with Lucinda (Cohen) Hittle to present an exciting webinar on the use of microflow chromatography for macromolecules.  Lucinda, a Director of Discovery Bioanalytics at Merck, presented an overview of the use of LC-MS for peptide analysis along with various case studies for in vitro and in vivo ...


    By Waters Corporation

  • Two Detector Solution to Analyzing Sulfur

    Sulfur compounds are reactive, corrosive to pipes, and destructive to catalysts in petroleum refineries. Sulfur emission are strictly regulated globally. When released into the atmosphere sulfur dioxide converts to sulfuric acid resulting in adverse effects on human health and the environment. Sulfur detection is found useful in many other industries; therefore, detection of sulfur compounds in ...


    By Restek Corporation

  • Pure water pH measurement in low conductivity samples

    Normally, pH measurements are made in water with 1,000 to 10,000 uS/cm conductivity. The conductivity conies from dissolved solids, typically, salts plus net acid or base which explains the exhibited pH. These dissolved substances are in the solution in ion form, which makes such solutions conducting. With 1,000 uS/cm conductivity of mobile ions pH electrodes have a good circuit and give fast, ...


    By IC Controls Ltd.

  • Norfolk CC tackle groundwater contamination with low-flow

    Quick and easy access in deep wells Geotech low flow groundwater analysis equipment has enabled quick and easy access to samples at 2m intervals down a 28m screen in deep boreholes. Elizabeth Guilford of Norfolk County Council hired the low flow kit from Geotech and used it on a Norfolk CC landfill where leachate contamination of groundwater was suspected. Samples taken at 2m intervals ...


    By Geotech

  • Low-Flow Purging Reduces Management of Contaminated Groundwater

    Purging a monitoring well prior to sampling removes stagnant water in the well casing and ensures collection of groundwater samples representative of formation water. Traditionally, a number of well casing volumes are removed (from three to five) and water stabilization parameters are monitored during removal of the casing volumes. Temperature, pH and specific conductance are routinely monitored ...


    By QED Environmental Systems

  • Sample Coolers

    Sample Coolers, originally developed in association with the CEGB, have been the industry standard for many years in nearly all Uk Power Stations and with UK Plant builders for both UK and overseas projects. The performance and reliability remain unsurpassed. Ever concious of changing markets, Lowe Engineering have the largest selection of sample coolers for mant varying applications, whilst ...


    By Lowe Engineering Limited

  • Methodology for sampling drinking water discolouration loose deposits at low velocities

    The occurrence of discoloured water at the tap is one of the most frequent reasons for customers to complain. Water discolouration arises from the re-suspension of loose deposits (LD) that accumulate in drinking water pipes, due to velocity increase. Because of its typical brownish/reddish colour, discoloured water is traditionally perceived as a consequence of cast-iron pipe corrosion, even in ...


    By IWA Publishing

  • Case study -Norfolk County Council tackle groundwater contamination with low-flow

    Geotech low flow groundwater analysis equipment has enabled quick and easy access to samples at 2m intervals down a 28m screen in deep boreholes. Elizabeth Guilford of Norfolk County Council hired the low flow kit from Geotech and used it on a Norfolk CC landfill where leachate contamination of groundwater was suspected. Samples taken at 2m intervals close to elevation of the suspected ...


    By Geotech

  • Automated Consignment Sampling Systems

    Introduction The following is a case study where consignment sampling has been implemented at a UK coal fired power station. Bias-Free Sampling The production of consistent and repeatable ‘bias-free’ samples is not possible but all international sampling standards give precise limits within which systems can be considered as being ...


    By Eriez Magnetics Europe Ltd

  • Detection of chlorpyrifos in air using low volume polyurethane foam (PUF) sampling with immunoassay

    MATRIX: Air samples ANALYTE: Chlorpyrifos RANGE OF DETECTION: 0.088 to 1.200 mg/m3 MATERIALS: Chlorpyrifos RaPID AssayÒ Kit and Sample Diluent. Reagents: methanol (pesticide grade). Equipment: 40 mL glass vials with Teflon lined caps, 13 x 100 mm glass test tubes, 5 mL and 20 mL serological pipets, micropipet ...


  • Case of Study – Low nitrification

    BM Respirometer The respirometer utilized for the study was a BM-T, provided with external thermostatic unit (bath) This “batch system” respirometer consists of: a single reactor vessel, divided into two interconnected compartments with closed recirculation loop between the two. Both compartments are kept completely mixed by means of paddle stirrers and a peristaltic recirculation A ...


    By SURCIS, S.L.

  • Case study - Multilevel sampling and monitoring, Maryland, USA

    Challenges Volatile Organic Compounds contaminated the groundwater posing a risk to nearby private water supply wells. The traditional approach of drilling and sampling multiple boreholes did not provide adequate data to characterize groundwater flow and contaminant migration in the complex fractured bedrock. Solution Westbay System* was installed ...


  • DOD evaluates bioaugmentation for remediating low-pH aquifers

    The US Department of Defense (DOD) has completed pilot-scale work on the 'MAG-1' site at Fort Dix, NJ, to test suitability of anaerobic bioremediation for an aquifer with low pH. Project results will be used to design full-scale ground-water treatment at MAG-1. In addition, technical criteria gained from the demonstration will be integrated into DOD’s remediation strategy for its many facilities ...

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