Blacks dry cleaner Tetrachloroethene remediation project Case Study
Courtesy of JRW Bioremediation, L.L.C.
- PCE source area in soil and groundwater at an active dry cleaner.
- Performed demonstration of Bioavailability Enhancement Technology (B.E. T.rM patent pending).
- B.E. T. is a source area bioremediation technology that enhances the dissolution of the chlorinated solvent contaminant and provides an electron donor for anaerobic reductive dechlorination (ARD).
- WIL CLEAR Sodium Lactate electron donor injected In an existing monitoring well using a simple metering device and garden hose.
- A single injection of WILCLEAR provided the system with greater than 1,000 mg/L of total organic carbon in a downgradient monitoring well.
- A single injection resulted in the onset of methanogenic conditions, the conditions under which ARD of chloroethenes is energetically favorable.
- The bioavailability and biodegradation of primary solvents was enhanced after a single injection - PCE and TCE decreased immediately and cis-1,2-DCE increased to concentrations significantly greater than the original PCE/TCE levels.
- It Is expected that complete ARD to ethene will commence following continued injection and biomass growth.
Utilizing TOC in Security Monitoring
This article reviews the USEPA`s Interim Guidance document in relation to Total Organic Carbon (TOC)measurements used for Security Monitoring.
Advancements in Sampling and Sample Pretreatment Systems that will Ease Meeting Nutrient Regulations
Adverse human activities can increase the level of nutrients present in the environment and, consequently, disrupt the aquatic ecosystem and lead to eutrophication. Nutrients are naturally present in the environment, and are important for maintaining a balanced aquatic ecosystem. An increase in the level of nutrients is a serious issue, as more nutrients can increase the algal bloom, which block the sunlight, cloud the water, and kill underwater grass1. In addition, as the algae die and decompose, oxygen is used,...
Using headspace gas monitoring to determine available carbon source (sodium acetate) in a ...
Aerobic and Anaerobic Bioremediation of 1,1-DCE and Vinyl Chloride in Groundwater
Untitled Document A three-tiered remediation approach is being used for successful field treatment of a 1,1- dichloroethene (1,1-DCE) groundwater plume. The plume is characterized by a chemical source area subject to anaerobic conditions (8.0 mg/L); an interior plume area of moderate aerobic (4.0 mg/L DO) and low chemical concentrations ( Previous studies from 1998 and early 1999 indicated that downgradient of the source area, elevated DO levels and intrinsic aerobically-degrading...
Enhanced Bioremediation of Chlorinated Solvents (PDF)
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Evaluation of Ecological Risks Associated with the use of Chlorine Dioxide for the Bleaching of ...
1.1 Scope and Objectives A small number of viable options are presently available for the bleaching of wood pulp (delignification and brightening) during the manufacture of pulp and paper. The use of chlorine dioxide (ClO2) in the bleaching process has largely superceded the earlier use of Cl2, or elemental chlorine, in the majority of North American pulp mills: It was discovered over a decade ago that the previous widespread use of Cl2 contributed to the production and subsequent release to the environment of...
State-wide collection of site remediation data in support of environmental quality objectives
Geographic Information Systems (GIS) hold great potential as a tool for managing environmental site remediation data. While noting the location of contaminated sites in GIS is commonplace, GIS has played only a minor role in review and analysis of chemical data gathered during an investigation or monitoring activity. The New Jersey Department of Environmental Protection Site Remediation Branch (NJDEP SRP) has undertaken a project making the use of GIS for this purpose a reality within their organization. Through...
Safety Training for an Interactive World
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Imagine being in charge of a chemical company. One day a fire breaks out, and an employee, designated as a first responder, is killed fighting the blaze. Then OSHA investigators discover that the man died primarily because both his training and his equipment were inadequate. This scenario is why CPL 2-2.59A should put anyone who runs a HAZMAT facility into a state of introspection. These employers need to ask themselves: `When was the last time that our Emergency Response Plan was brought up to date? Do our...
Halogenated Volatile Organic Compounds
Sites where halogenated VOCs may be found include burn pits, chemical manufacturing plants or disposal areas, contaminated marine sediments, disposal wells and leach fields, electroplating/metal finishing shops, firefighting training areas, hangars/aircraft maintenance areas, landfills and burial pits, leaking collection and system sanitary lines, leaking storage tanks, radioactive/mixed waste disposal areas, oxidation ponds/lagoons, paint stripping and spray booth areas, pesticide/herbicide mixing areas, solvent...
Compilation of EU Dioxin Exposure and Health Data
Introduction There is considerable public, scientific and regulatory concern over the possible adverse health effects of chronic exposure to trace levels of persistent organic pollutants. The class of compounds made up of the polychlorinated dibenzo-p-dioxins (PCDD) and polychlorinated dibenzofurans (PCDF), often collectively known as dioxins, has received widespread attention and attracted a great deal of research, following the accidental release of the most toxic of these (2,3,7,8 TCDD) at Seveso in 1976. Diox...
Knowledge Gaps Limiting the Application and Acceptance of Risk-Based Management of Contaminated Land
A position paper prepared by the Soil & Groundwater Technology Association (SAGTA), for the Department of the Environment, Transport and the Regions (DETR) and the Environment Agency (EA) in November 1998. It sets out an industry view on the knowledge gaps and research needs for the risk based management of contaminated land for the workshop ‘Matching Contaminated Land Research to Need’ planned for April 1999. SAGTA member organisations are drawn from leading members of UK industry. They are actively addressing...
Enhancement of Terrestrial Carbon Sink Potential: A Possible Contribution to Mitigating Global ...
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Technology Status Report In Situ Flushing
ABSTRACT This technology status report provides a snapshot of the status of the in situ flushing remediation technology. The information provided herein is a reflection of the content of the Ground-Water Remediation Technologies Analysis Center’s (GWRTAC’s) case study database for innovative technologies. GWRTAC’s case study database is not represented as being comprehensive, nor are the case studies included screened to verify their validity, quality, or “success” in remediation. Rather the case study database...
Ex Situ Biological Treatment for Soil, Sediment, and Sludge
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Containment for Soil, Sediment, and Sludge
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Thermally Enhanced Soil Vapor Extraction
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Properties and Behavior of Nonhalogenated VOC`s
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Common Treatment Train for Fuels
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In-well vapor stripping technology involves the creation of a ground-water circulation pattern and simultaneous aeration within the stripping well to volatilize VOCs from the circulating ground-water. Air-lift pumping is used to lift ground-water and strip it of contaminants. Contaminated vapors may be drawn off for aboveground treatment or released to the vadose zone for biodegradation. Partially treated ground-water is forced out of the well into the vadose zone where it reinfiltrates to the water table....
Air Sparging - Technology Overview
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