Subsurface Monitoring Articles

  • Regional geological recognition for the implementation of a urban geothermal concept

    A reflection seismic survey was performed in the city of Lausanne (CH) to map geological layers relevant to geothermal energy production. By using a wireless seismic system and a powerful seismic vibrator source we were able to high quality results despite the presence of elevated urban noise levels. The new subsurface maps allow the estimation of the geothermal potential for the city of ...


    By Geo2X

  • 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 - Construction Aggregate: Sand

    Geologic Mapping of Sand Unit Thickness Pyramid was contracted to perform an electrical resistivity survey across 230 acres of undeveloped land in North Carolina. The purpose of the survey was to quantify the lateral extents and approximate depth/thicknesses of sandy soils near the ground surface. The client was interested in the potential of the site to be utilized as a sand mine, and ...


    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.

  • Case Study - Sinkhole: Leaking Retention Pond

    Scan for liner leaks in retention pond Objective:  Map the extent of a sink hole and locate zones where water is leaking from a pond Date:  January 20, 2015 Site: Retention pond and sink hole near Lenoir City, Tennessee, USA Instrument:  SuperStingR8 with 112 total electrodes arranged in a 4x28 3D grid with 16x8ft spacing ...


    By Advanced Geosciences, Inc.

  • 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 ...

  • Shenandoah, VA - DNAPL in clay at active facility - Case Study

    Guaranteed Remediation of TCE and 1,1-DCE in Soil and Bedrock Project Summary TRS Group implemented an electrical resistance heating (ERH) remedy to remove trichloroethylene (TCE) in overburden soil surrounding a former dry well located at a manufacturing facility in Shenandoah, Virginia. TCE soil concentrations were measured at levels that were indicative of separate-phase liquid. Initial ...


    By TRS Group, Inc.

  • 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

  • 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

  • Virus removal vs. subsurface water velocity during slow sand filtration

    In an attempt to obtain a conservative estimate of virus removal during slow sand and river bank filtration, a somatic phage was isolated with slow decay and poor adsorption to coarse sand. We continuously fed a phage suspension to a 7-m infiltration path and measured the phage removal. In a second set of experiments, we fed the phage suspension to 1-m long columns run at different pore water ...


    By IWA Publishing

  • Integration of the rice paddy water management into a coupled surface-subsurface water flow model in the Sakuragawa River watershed (Japan)

    Rice paddy water management was integrated into a distributed three-dimensional surface and subsurface coupling hydrological model of the Sakuragawa River watershed. This watershed is located in the Kanto Plain in Japan and includes the hillside of Mt. Tsukuba. Therefore, this watershed includes both steep mountainous areas and rice paddy-dominated flat land. Thus, water management of rice ...


    By IWA Publishing

  • Use of geological mapping tools to improve the hydraulic performance of SuDS

    Most cities in Denmark are situated on low permeable clay rich deposits. These sediments are of glacial origin and range among the most heterogeneous, with hydraulic conductivities spanning several orders of magnitude. This heterogeneity has obvious consequences for the sizing of sustainable urban drainage systems (SuDS). We have tested methods to reveal geological heterogeneity at field scale ...


    By IWA Publishing

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