groundwater site Articles
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Nor Cal 2002 Case Study (C3 Technology)
The project site is located in Northern California and was leased and operated as a chemical storage and solvent recovery operation from late 1972 through April 1993. During an earlier period, the site may also have been used as a waste transfer station. Previous investigations indicate that soil and groundwater at the site, and groundwater down-gradient (westward) from the site, have been ...
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Controls on groundwater nitrogen contributions from on-site wastewater systems in coastal North Carolina
The goal of this study was to evaluate the influence of soil type and separation distance to water table on dissolved inorganic nitrogen concentrations in groundwater adjacent to on-site wastewater systems. Groundwater nitrogen species (NO3--N and NH4+-N) and groundwater levels adjacent to 16 on-site systems in three different soil groups (group I- sand, group II- coarse loams and group III ...
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Identifying sources of groundwater in the lower Colorado River valley, USA, with δ18O, δD, and 3H: implications for river water accounting
Isotope measurements (18O, D, 3H) indicate groundwater origin in the Lower Colorado River Valley (LCRV) and provide an alternative, or supplement, to the US Bureau of Reclamations proposed accounting surface method. The accounting surface method uses a hydraulic criterion to identify certain wells away from the flood plain that will eventually yield mainstream Colorado River water. New isotope ...
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North LA Case Study (C3 Technology)
The project site is an industrial facility located in the foothills of northern Los Angeles, California. The facility utilized chlorinated solvents in operations. Based on soil borings, site geology consisted of unconsolidated gravely sands, sand, silty sand, sandy silt, and silt from ground surface to more than 200 feet below ground surface (bgs). Groundwater was encountered at the site at ...
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Site 25 System Slows Down Contamination
The Air Force has installed dollar $2 million groundwater extraction and granular activated carbon system to slow down the spread of the solvent trichloroethene (TCE) groundwater contamination at Site ...
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GW monitoring in saxony
Background During the hundred-year flood in 2002 in Eastern Germany the river “Elbe“ and a lot of rivers in the catchment area exceeded the banks and caused damages of millions within a short period of time. Often unnoticed, the groundwater level was rising extremely after a certain time. The time of rising groundwater took considerably longer than the actual flood, and caused enormous ...
By OTT HydroMet
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Case study – BTEX contamination - Kentucky
In 1992, remedial activities began at the Shively Service Center located in Radcliff, Kentucky. After the leaking underground storage tanks were removed from the site approximately 1,500 cubic yards of BTEX impacted soil was excavated and disposed off-site from the tank pits. Based on the review of historical sampling activities it was believed that the majority of the impacted soils were removed ...
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Groundwater Exploration in South Sudan - Case Study
Purpose The Radler Foundation, Water Harvest International, and East African Ministries are humanitarian organizations working to bring water wells to villages in rural areas of Africa. In February 2015, they wanted better information about where to drill a well in the Yeri Mozo Village in South Sudan in order to provide access to safe and clean water—and improve the quality of ...
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Deep, DNAPL remediation Portland, OR
In 1999, the senior managers of TRS Group, Inc (TRS) while working for a former employer, as a subcontractor toAMEC, provided Electrical Resistance Heating (ERH) for VOC-impacted groundwater at a commercial site in Portland,Oregon. The remediation was conducted under the Oregon Department of Environmental Quality (DEQ) Voluntary Cleanup ...
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Case study – TPH contamination
This site had Benzene groundwater levels of greater than 5 ug/L and TPH groundwater levels of 30-130 mg/L with TPH soil levels of 200-800 mg/kg before treatment with BOS 200®. The site was closed after ...
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Fractured Bedrock Formation PCE, Pennsylvania - Case Study
The Accelerated Remediation Technologies, LLC, (ART) Integrated Remediation Technology was installed at an operating, industrial laundry facility to remedy groundwater in a fractured bedrock geologic formation. Contaminant(s) of concern: PCE Site Description: The site is located in eastern Pennsylvania and the subsurface consists of silty clay to depths ranging from 10 to 60 feet underlain by ...
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Feasibility study of in-situ bioremediation for nitrobenzene-contaminated groundwater
Although many studies have simulated in-situ bioremediation of contaminated groundwater, most of them have not considered hydrochemical conditions and indigenous microorganisms, thus potentially rendering results inapplicable to actual in-situ groundwater bioremediation projects. This study focused on a nitrobenzene-contaminated groundwater site located in Jilin City, China. The actual ...
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Gas station: Stuart, Florida
Aerobic bioremediation with air sparging Site Description Underground storage tank (UST) leaks from a gas station contaminated shallow ground- water under the property. Following the removal of the leaking USTs and impacted soils around the tank cavity, combined air sparging and aerobic bioremediation was implemented to remediate the groundwater. Site Characteristics Geology and Hydrogeology ...
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Case study – benzene/TPH contamination - convenience store
This site had groundwater Benzene levels of up to 26,000 ug/L and groundwater TPH levels of up to 14,400 ug/L. After treatment, only one monitoring level (GRO) in one well (M-7) remains above standard. Further monitoring will be conducted before applying for site ...
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Development of a risk-based approach for better protection of drinking water catchments in Flanders (Belgium)
Around 70% of the drinking water produced by De Watergroep (a Belgian public water company) is extracted from 83 groundwater pumping sites. To control the risks that endanger the drinking water supply and for the groundwater extracted to be as pure as possible, a risk-based approach for the protection of the catchment areas is developed, as part of the water safety plans. The approach ...
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CASE STUDY - Surfactant Enhanced Extraction of Carbon Tetrachloride at an Active Grain Elevator
Current Site Conditions • Groundwater and soil data indicate impacts of fumigant constituents of concern (COCs), primarily carbon tetrachloride, resulting from historical operations associated with fumigant storage tanks and application. • Groundwater is encountered at the site approximately 7 to 8 feet below ground surface (bgs). Lithology within the source zone generally consists of ...
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Packer Testing Program Design and Management
Abstract: Hydraulic testing using wireline deployed water-inflated packers is becoming a common practice for groundwater characterization at mining sites. Packers, designed for diamond drilling, allow for faster, deeper, and more accurate types of testing conducted concurrently with existing coring programs. Designing and managing these testing programs requires planning, flexibility, and ...
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Remediation of TCE in soil and groundwater to 95 feet below grade pemaco superfund site, Maywood, CA
TRS Group, Inc. (TRS) subcontracted to TN & Associates to provide an Electrical Resistance Heating (ERH) remediation of trichloroethene (TCE) in soil and groundwater at the Pemaco Superfund Site located in Maywood, California. This is the first EPA Record of Decision (ROD) in California that includes ERH as the selected technology for the treatment of a deep TCE source area. The remedial goal ...
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Case study – TEPH contamination - petroleum release site – Golden, CO
Site: Petroleum Release – Golden, CO Contaminant: TEPH in soil Soil Type: Clay Injection Cost: ~$9,000 (material & labor) Plume Area: ~500 sq. ft. Plume Thickness: 4 feet (8 to 12 feet bgs) Date of Treatment: April 6 and 7, 2004 Notes: The goal of the project was to bring small petroleum surface spills affecting soils on the subject site to below the Colorado Department of Labor and ...
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Systems approach - Petroleum site
An 18-month, in-situ biological program, specifically aimed at accelerating the current attenuation process such that the owner can sell the property began May 5, 2000. The remedial approach focused on bacterial population management, nutrient augmentation, terminal electron acceptor enhancement, and an efficient subsurface delivery of the enhancement liquids. Specifically, a novel delivery ...
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