Subsurface Monitoring Articles

  • Train derailment prompts contaminated land investigation

    On March 30th 2015 a long freight train, transporting a variety of goods including lumber and chemicals, wound its way through the state of Mississippi. At around 5pm, part of the train failed to negotiate a curved portion of the track in a rural area near Minter City, resulting in the derailment of nine railcars, one of which leaked chemicals onto agricultural farmland and woodlands. Emergency ...


    By Gasmet Technologies Oy

  • Difficulties and modifications in the use of available methods for hydraulic conductivity measurements in highly clogged horizontal subsurface flow constructed wetlands

    Despite the fact that several authors consider the available measurement methods of hydraulic conductivity (ks) suitable for a good representation of the bed condition and clogging potential in horizontal subsurface flow constructed wetlands, others have questioned their adequacy. In this work, hydraulic conductivity measurements with conventional and modified methods were ...


    By IWA Publishing

  • Tracer test and behavior of selected pharmaceuticals

    Study of the behavior and transport of pharmaceuticals in groundwater is significant for understanding the processes of natural attenuation and potential use of filtration through the aquifer to evaluate the most effective way to remove pharmaceuticals that occur under anthropogenic influence. This paper presents the results of a field experiment at the location of the drainage system of ...


    By IWA Publishing

  • Methods used to carry out six roadway investigations of sinkholes

    Abstract Karst conditions are a prevalent problem impacting many roads, bridges and highways of the United States. Six case-histories present an overview of investigations made to determine the presence of karst (sinkholes and cavities) and their possible impact on existing or new construction. These six case-histories represent projects which range from reconnaissance investigations to ...


    By Geonics Limited

  • Mapping exploitable gravel layers with Electrical Resistivity Tomography

    Geoelectrical measurements in a gravel pit were used to map exploitable gravel layers, to estimate their thickness and measure the overburden. 9 profiles with a length between 235 and 715m have been measured. The maximum penetration depth was about 45m. Visualizations on maps and in 3D fence diagrams show the distribution of the mineable gravel layers and simplify the planning of the ...


    By Geo2X

  • North Dakota Pipeline Release Data Collection and Communication - Case Study

    Challenge A North Dakota pipeline released an estimated 21,000 bbls of crude oil. Antea Group was challenged by the client to assemble a team of specialists capable of effectively and efficiently collecting and communicating extent and migration data to key stakeholders. Due to the magnitude of the spill, spatial and environmental data needed to be collected electronically to ...


    By Antea Group - USA

  • 3 Ways to Optimize Your EHS Data

    See What You've Been Missing As consultants, we’re always looking to find the most efficient ways to understand our project site data and maximize our understanding of the conditions and processes in the subsurface. Understanding data begins with quality data management, but it's important to have a streamlined process for providing data in proprietary formats for mapping and ...


    By Antea Group - USA

  • Case Study - Historic Cemetery - Texas

    Archaeological grave site locating Objective:  Locate potential unmarked graves Site:  Historic family cemetery in San Antonio, Texas USA dating to 1899 Instrument:  SuperSting R8/IP, Switch Box112 and 112 electrodes installed in a 7x6 foot 3D dipole-dipole grid Software:  EarthImager 3D Result:  3D resistivity ...


    By Advanced Geosciences, Inc.

  • Case Study - Pipeline Subsidence

    Looking for sinkholes Pyramid Environmental recently performed a geophysical investigation for the National Park Service at Carlsbad Caverns National Park in Carlsbad, NM. The survey used electrical resistivity mapping (ER) to look for potential underground caves or caverns near an area designated for the construction of an underground utility line. A 2D resistivity survey ...


    By Advanced Geosciences, Inc.

  • Mineral Exploration in Colombia - Case Study

    Our clients used AGI tools to explore a site of volcanic rocks in order to locate areas of raw material of pozzolan (volcanic ash), which can be mined and sold for profit. Process Our clients used SuperSting R1 for imaging to survey the subsurface of the site in 2D slices in terms of resistivity. They used a Wenner ...


    By Advanced Geosciences, Inc.

  • Potential soil characteristics for riverbank filtration using 2-D ground resistivity in Kota Lama Kiri, Kuala Kangsar

    Identifying the subsurface profile for riverbank/bed filtration (RBF) using conventional methods such as drilled boreholes is usually labor intensive, costly and acquires only 1-D profiling. Hence, a 2-D ground resistivity method was used as an alternative to obtain a 2-D subsurface profile by extending to 200 m length at Kota Lama Kiri, Kuala Kangsar, Perak site area. Four resistivity survey ...


    By IWA Publishing

  • Case study - EPH in soil evaluation study at tank farm site

    Ambient Engineering, Inc. (Concord, MA) used Sitelab to investigate and remediate a former tank farm along Boston Harbor contaminated by a large, subsurface plume of commingled diesel fuel and No. 6 fuel oil. Ambient’s Licensed Site Professional (LSP) had the opportunity – and budget – to evaluate Sitelab against three certified laboratories. Soil samples were collected from ...


    By Sitelab Corporation

  • Jackson storm cells pilot case study

    Performance History and Discussion The City of Jackson (COJ) and Jackson Water Partnership (JWP) selected In-Pipe Technology (IPT) in March 2010 to team with them and implement a beta test project. The principal purpose being to evaluate the microbial technology and benefits of the IPT professional services program for the Savanna WWTP Storm Cells. In-Pipe Professional services ...

  • Performance of hybrid subsurface constructed wetland system for piggery wastewater treatment

    The objective of this study was to evaluate performance of a hybrid constructed wetland (CW) built for high organic content piggery wastewater treatment in a cold region. The system consists of four vertical and one horizontal flow subsurface CWs. The wetland was built in 2009 and water quality was monitored from the outset. Average purification efficiency of this system was 95 ± 5, 91 ± 7, 89 ...


    By IWA Publishing

  • Mapping Sand Unit Thickness for Construction Aggregate in North Carolina - Case Study

    In August 2015, Pyramid Environmental was contracted to estimate the cubic yards of sandy soil valuable as a construction aggregate on the 230 acres of undeveloped land in North Carolina. Purpose The purpose of the electrical ...


    By Advanced Geosciences, Inc.

  • A pilot study of a subsurface-flow constructed wetland treating membrane concentrate produced from reclaimed water

    A pilot study was conducted for 7 months for the City of Oxnard, California, on the use of constructed wetlands to treat concentrate produced by microfiltration and reverse osmosis (RO) of reclaimed wastewater. The treatment performance of a transportable subsurface-flow wetland was investigated by monitoring various forms of nitrogen, orthophosphate, oxygen demand, organic carbon, and selenium. ...


    By IWA Publishing

  • Sensitivity of antibiotic resistant and antibiotic susceptible Escherichia coli, Enterococcus and Staphylococcus strains against ozone

    Tolerance of antibiotic susceptible and antibiotic resistant Escherichia coli, Enterococcus and Staphylococcus strains from clinical and wastewater samples against ozone was tested to investigate if ozone, a strong oxidant applied for advanced wastewater treatment, will affect the release of antibiotic resistant bacteria into the aquatic environment. For this ...


    By IWA Publishing

  • Impact of artificial monolayer application on stored water quality at the air–water interface

    Evaporation mitigation has the potential to significantly improve water use efficiency, with repeat applications of artificial monolayer formulations the most cost-effective strategy for large water storages. Field investigations of the impact of artificial monolayers on water quality have been limited by wind and wave turbulence, and beaching. Two suspended covers differing in permeability to ...


    By IWA Publishing

  • Impact of artificial monolayer application on stored water quality at the air–water interface

    Evaporation mitigation has the potential to significantly improve water use efficiency, with repeat applications of artificial monolayer formulations the most cost-effective strategy for large water storages. Field investigations of the impact of artificial monolayers on water quality have been limited by wind and wave turbulence, and beaching. Two suspended covers differing in permeability to ...


    By IWA Publishing

  • EQuIS as the Key to Unlocking the Potential of Data - Case Study

    Polycyclic Aromatic Hydrocarbon (PAH) History Reilly Tar and Chemical 80 acre property, operated 1917-1972 Coal tar and distilled by-products discharged to ditch and peat bog through 1939 Onsite industrial well with leaky casing PAH History Reilly Tar and Chemical 1934 the city’s first water supply well ...


    By EarthSoft, Inc

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