Modeling Application of Hydrogen Release Compound to Effect in situ Bioremediation of Chlorinated Solvent-Contaminated Groundwater

This study investigates how application of Hydrogen Release Compound (HRC) might be implemented to remediate a site contaminated with tetrachloroethene (PCE) or its daughter products, under varying site conditions. The 3-D reactive transport model RT3D was coupled with a dual-Monod biodegradation submodel to simulate the effect of the hydrogen generated by HRC on accelerating the biodegradation of dissolved chlorinated solvents. Varying site conditions and injection well configurations were investigated to determine the effect of these environmental and design conditions on overall treatment efficiency. The model was applied to data obtained at a chlorinated solvent contaminated site at Vandenberg AFB, where a pilot study of HRC injection was conducted. Historical data were initially used to calibrate the model, under the assumption that natural reductive dehalogenation processes are occurring at the site. The model was then applied to predict how HRC injection enhances natural attenuation processes. Model predictions were compared to the results of the pilot study. The model-simulated concentrations were relatively consistent with concentrations measured at the site, indicating the model may be a useful design tool, as well as an aid to help us better understand how HRC injection may enhance natural attenuation of chlorinated solvents

Evaluation of Hydrogen/Oxygen release compounds for the remediation of VOCs

Problem statement: In this work the potential of two reagents (HRC and ORC from Regenesis) for the remediation of Volatile Organic Compounds (VOCs) is evaluated considering the results of some laboratory tests. Approach: Five series of batch tests were performed with an artificial polluted aqueous phase and some soil coming from a polluted site in which natural attenuation of VOCs occurs. Hydrogen Release Compound (HRC) and Oxygen Release Compound (ORC) were tested about the degradation of benzene, toluene, ethylbenzene and xylene (BTEX) and some chlorinated aliphatic compounds (CAHs), and the net contribute of the soil in removing the pollutants from the aqueous phase by means of sorption processes was also evaluated. Results: The experimental data were modeled by means of different mathematical equations, considering zero and first order kinetics, and the results were discussed and compared. Conclusions: ORC exhibited a good efficiency in the degradation of BTEX and the zero order model was found as a reliable approximation of experimental data (with the exceptions of benzene and toluene, for which a first order kinetic model was trustworthy), while HRC showed a good efficiency in the degradation of CAHs and a first order model consistently estimated almost all experimental data

The 21st Annual International Conference on Soils, Sediments and Water

Conference at a Glance Monday, October 17, 2005 Workshops (Workshops #1 and #2: 10:00am - 5:00pm; Workshop #3: 1:00 - 5:00pm; Workshop #4: 1:00 - 3:00pm, Workshop #5: 2:00 - 5:00pm) 1) Theory and Use of Field Portable X-ray Fluorescence for Soil Analysis 2) In-Situ Chemical Oxidation Workshop 3) The Role of Anaerobic Biodegradation Processes in Passive and Enhanced Monitored Natural Attenuation Programs 4) Application of Classic and Emerging Techniques in Environmental Forensics 5) Environmental Fate of Hydrocarbons in Soils and Groundwater Tuesday, October 18, 2005 Platform Presentations 8:30am – Noon Session 1: Environmental Biotechnology Session 2: Ecological Restoration and Natural Treatment Systems Session 3: Pesticides (10:30am – Noon) Session 4: Heavy Metals 1:30 – 5:30pm Session 1: Arsenic Session 2: Bioremediation Session 3: Bioremediation Strategies for Contaminated Soils and Sediments Session 4: Ozone Poster Session 4:00 – 6:00pm, Exhibit Area, First Floor, Campus Center Social 4:30-6:00pm, Exhibit Area, First Floor, Campus Center Workshops 7:00 - 10:00pm 6) Applied Environmental Forensics Workshop 7) Massachusetts Contingency Plan Method 2 Risk Characterizations Wednesday, October 19, 2005 Platform Presentations 8:30am – Noon Session 1: Perchlorate: Emerging Issues and Innovative Remedial Approaches Session 2: Soil Geochemical Background on a Continental Scale Session 3a: Environmental Fate Session 3b: Risk Assessment Session 4: Environmental Stewardship and Proactive Management at Small Arms Ranges 1:30 – 5:30pm Session 1: Ecoterrorism: Research Issues Session 2: Environmental Forensics Session 3a: Legal/Regulatory Session 3b: MTBE Session 4: Bioremediation of Acid Mine Drainage Wastes Poster Session 4:00 – 6:00pm Exhibit Area, First Floor, Campus Center Social 4:30-6:00pm, Exhibit Area, First Floor, Campus Center Workshops 7:00 - 10:00pm 8) In-Situ Thermal Remediation 9) Perchlorate: The Path to Regulatory Standards Setting and Future Assessment & Cleanup Implications 10) NIMS (National Incident Management System) and the Environment Thursday, October 20, 2005 Platform Presentations 8:30am – Noon Session 1: Evolving Strategies for Dealing with Contaminated Sediments Session 2: Pay-for-Performance Remediation Technologies - Methods & Case Studies of Science & Economics Session 3: Phytoremediation Session 4: Site Assessment 1:30 – 5:30pm Session 1: Remediation Session 2: Chemical Oxidation Session 3a: Analysis Session 3b: Indoor Ai

The 20th Annual International Conference on Soils, Sediments and Water

Conference at a Glance Monday, October 18, 2004 Workshops (Workshop #1: 9:00 am-5:00 pm, Workshops #2-3: 10:00 am-5:00 pm, Workshops #4-5: 1:00-5:00 pm, Workshop #6: 2:00-5:00 pm) Workshop #1: Modeling Vapor Attenuation Workshop: A Study of Vapor Intrusion Modeling in the Context of EPA’s Guidance Workshop # 2: Theory and Use of Field Portable X-ray Fluorescence for Soil Analysis Workshop #3: In-Situ Chemical Oxidation Workshop Workshop #4: The Triad Approach to Managing Decision Uncertainty for Better Cleanup Projects Workshops #5: The Role of Anaerobic Biodegradation Process in Passive and Enhanced Monitored Natural Attenuation Programs Workshop #6: Environmental Fate of Hydrocarbons in Soils and Groundwater Tuesday, October 19, 2004 Platform Presentations 8:30am – Noon Session 1: Environmental Biotechnology Session 2: Heavy Metals at Training Ranges Session 3: Site Assessment Session 4: Bioremediation of Acid Mine Drainage and Removal of Metals 1:30 – 5:30pm Session 1: Environmental Terrorism Session 2: Remediation I Session 3: Phytoremediation Session 4: Heavy Metals Poster Session 4:00 – 6:00pm Social 4:30 – 6:00pm. Exhibit Area, First Floor Campus Center Workshops (Evening, 7:00 – 10:00pm) Workshop #1: Modeling Vapor Attenuation Workshop: A Study of Vapor Intrusion Modeling in the Context of EPA’s Guidance (Continued) Workshop #7: Asbestos and the MCP Workshop #8: Policy Issues in Inter-Agency Coordination Workshop #9: In-Situ Thermal Remediation Wednesday, October 20, 2004 Platform Presentations 8:30am – Noon Session 1: In-Situ Chemical Oxidation Session 2: Oxygenates Session 3: Bioindicators/Biomarkers of Environmental Health: Concepts and Application Session 4: Pay-for-Performance Remediation Technologies - Methods & Case Studies of Science & Economics 1:30 – 5:30pm Session 1: Risk Assessment and Remedial Approaches Towards Restoration and Management of Contaminated Rivers Session 2: Arsenic Session 3a: Analysis Session 3b: Pesticides Session 3c: Indoor Air Session 4: Bioremediation Poster Session 4:00 – 6:00pm Social 4:30 – 6:00pm. Exhibit Area, First Floor Campus Center Workshops (Evening, 7:00 – 10:00pm) Workshop #10: An Introduction to the Use and Application of Gene Chips in Environmental Toxicology and Implications for Their Use as Biomarkers in Contaminated Sites Evaluations Workshop #11: Latest Developments in Managing Perchlorate in Soils and Groundwater Workshop #12: Vapor Intrusion into Indoor Air Workshop: MADEP Requirements, Background Levels, Case Studies and More Workshop #13: Exploring Innovative and Cost-Effective Solutions to Contaminated Sediments to Achieve Ecological Restoration of the Lower Neponset River Workshop #14: Environmental Forensics Workshop Thursday, October 21, 2004 Platform Presentations 8:30am – Noon Session 1: Environmental Forensics Session 2a: Legal Issues Session 2b: Modeling Session 3: Perchlorate Session 4: Risk Assessment and Bioavailability 1:30 – 5:30pm Session 1: Remediation II Session 2: Sediments Session 3: Regulator

Groundwater Strategy for the Ou-1 Landfill Area, Miamisburg Closure Project, Ohio

The general objective of the study was to assist the Miamisburg Closure Project in their efforts to develop and refine a comprehensive, technically sound strategy for remediation of groundwater contaminated with trichloroethylene and other volatile organic compounds in the vicinity of the landfill in Operable Unit 1. To provide the necessary flexibility to the site, regulators and stakeholders, the resulting evaluation considered a variety of approaches ranging from ''no further action'' to waste removal. The approaches also included continued soil vapor extraction, continued groundwater pump and treat, monitored natural attenuation, biostimulation, partitioning barriers, hydrologic modification, and others