Other Recent Additions
Recent Additions
Posted: October 25, 2012
The Department of Defense's Strategic Environmental Research and Development Program (SERDP) is seeking environmental research and development proposals for funding beginning in Fiscal Year (FY) 2014 in response to the Core and SERDP Exploratory Development (SEED) solicitations. Projects will be selected through a competitive process. All Core pre-proposals from the Federal and non-Federal sectors are due Tuesday, January 8, 2013. SEED proposals are due Tuesday, March 12, 2013.
Open Position with EPA's Environmental Response Team in Las Vegas, Nevada
Posted: October 25, 2012
The Environmental Response Team (ERT) specializes in field support and technical expertise for EPA responses to oil spills, hazardous emergencies, potentially hazardous scenarios, environmental disasters and long-term remedial activities as well as detection and analytical method development for biological and chemical agents. ERT is active in providing both national and international assistance to remediate and limit damage to air, land and water and to evaluate threats to both human and ecological health. The ERT is prepared to respond to environmental emergencies 24 hours a day, seven days a week, 365 days a year.
The ERT physical scientist/industrial hygienist will provide emergency response, site clean- up and health and safety support for environmental emergencies across the US in support of the EPA emergency response, removal, remedial and homeland security programs. This involves providing on-site advice and technical support to EPA On-Scene Coordinators and Remedial Project Manager for site investigations, assessments, sampling and modeling projects. In addition, this person will provide routine and emergency site advice and technical support on field analytical tools. Travel may be over 10 days per month throughout the US in support of site clean- up, national technical workgroups and hazardous material and homeland security exercises.
EPA is accepting applications beginning October 25, 2012. Specific job information and application instructions for the position are posted on the USAJOBS Internet site. Vacancy Announcement Numbers: CI-OSWR-DE-2013-0005 and CI-OSWR-MP-2013-0002. Applicants must be United States citizens. The U.S. EPA is an Equal Opportunity Employer.
The ERT physical scientist/industrial hygienist will provide emergency response, site clean- up and health and safety support for environmental emergencies across the US in support of the EPA emergency response, removal, remedial and homeland security programs. This involves providing on-site advice and technical support to EPA On-Scene Coordinators and Remedial Project Manager for site investigations, assessments, sampling and modeling projects. In addition, this person will provide routine and emergency site advice and technical support on field analytical tools. Travel may be over 10 days per month throughout the US in support of site clean- up, national technical workgroups and hazardous material and homeland security exercises.
EPA is accepting applications beginning October 25, 2012. Specific job information and application instructions for the position are posted on the USAJOBS Internet site. Vacancy Announcement Numbers: CI-OSWR-DE-2013-0005 and CI-OSWR-MP-2013-0002. Applicants must be United States citizens. The U.S. EPA is an Equal Opportunity Employer.
Open Position with EPA's Environmental Response Team in Las Vegas, Nevada
Posted: October 25, 2012
The Environmental Response Team (ERT) specializes in field support and technical expertise for EPA responses to oil spills, hazardous emergencies, potentially hazardous scenarios, environmental disasters and long-term remedial activities as well as detection and analytical method development for biological and chemical agents. The ERT physical scientist/industrial hygienist will provide emergency response, site clean-up and health and safety support for environmental emergencies across the US in support of the EPA emergency response, removal, remedial and homeland security programs. This involves providing on-site advice and technical support to EPA On-Scene Coordinators and Remedial Project Manager for site investigations, assessments, sampling and modeling projects. In addition, this person will provide routine and emergency site advice and technical support on field analytical tools. EPA is accepting applications beginning October 25, 2012. Specific job information and application instructions for the position are posted on the USAJOBS Internet site. Vacancy Announcement Numbers: CI-OSWR-DE-2013-0005 and CI-OSWR-MP-2013-0002. The U.S. EPA is an Equal Opportunity Employer.
Strategy to Expand Superfund Optimization Practices from Site Assessment to Site Completion
Posted: October 16, 2012
The purpose of this National Strategy (Strategy) is to expand and formalize optimization practices from site assessment to site completion as an operating business model for the Superfund Remedial Program (Remedial Program). This Strategy fulfills Action 10 of the Office of Solid Waste and Emergency Response (OSWER) Integrated Cleanup Initiative (ICI): "Opportunities to Provide Greater Support in Optimizing Cleanup of Superfund Sites."
FY2013 Proposal Guidelines for Brownfields Area-Wide Planning Grants
Posted: October 5, 2012
These grants may be used by communities to facilitate community involvement in developing an area-wide plan for brownfields assessment, cleanup and subsequent reuse on a catalyst site and other high-priority brownfield sites. Each grant is funded up to $200,000 for two years. The proposal submission deadline is November 30, 2012.
Demonstration and Evaluation of Solid Phase Microextraction for the Assessment of Bioavailability and Contaminant Mobility
Posted: September 19, 2012
Project ER-200624 was conducted to develop and standardize a procedure using field-deployable solid-phase microextraction (SPME) for the in situ measurement of freely dissolved porewater concentrations of hydrophobic organics in sediments, as well as to demonstrate the relationship of these measurements to contaminant flux, bioavailability, and bioaccumulation.
Practical Tool for Enhanced Reductive Dechlorination Design in Clay Till
Posted: September 19, 2012
Successful implementation of enhanced reductive dechlorination (ERD) in clay tills depends on both site-specific and design parameters. An Excel-based tool has been developed to assess mass removal and contaminant mass flux to the aquifer during ERD in clay tills with consideration of these controlling parameters. The tool can be used for decision-making support to select remediation technology, optimization of remediation design, planning of risk management during remediation, and input to other decision-support tools. The Excel-based tool was developed by Orbicon A/S based on data generated by a numerical model developed by DTU Environment. The spreadsheet and manual are available at the REMTEC website:
Proceedings: Snowman Network Conference On Monitored Natural Attenuation, November 7, 2011, Salon Du Relais, Paris
Posted: September 19, 2012
The SNOWMAN Network is a transnational group of research funding organizations and administrations in the field of soil and groundwater in Europe. In addition to seven slide presentations, separate reports on the state of the art concerning implementation of monitored natural attenuation (MNA) in Europe for Belgium, Denmark, France, Germany, the Netherlands, and Sweden are posted in the proceedings. Among these SNOWMAN network countries, significant differences can be observed in MNA definitions and approaches. A summary report inventories these differences and recent MNA research and implementation.
Before You Tear It Down, Get the Mercury Out: Recommended Management Practices for Pre-Demolition Removal of Mercury-Containing Devices From Residential Buildings
Posted: September 19, 2012
This fact sheet specifically addresses pre-demolition removal of mercury-containing gas pressure regulators, boiler heating systems, and thermostats.
Remediation of Mercury Contaminated Sites: a Review
Posted: September 19, 2012
This paper presents an up-to-date review of conventional and emerging techniques for the remediation of mercury-contaminated soil: stabilization/solidification, immobilization, vitrification, thermal desorption, soil washing, electro-remediation, phytostabilization, phytoextraction, phytovolatilization, and nanotechnologies. Longer abstract:
Chlorinated Solvent Source-Zone Remediation Via Zvi-Clay Soil Mixing: 1-Year Results
Posted: October 7, 2012
A remediation approach involving zero-valent iron (ZVI)-mediated degradation mixed with clay for in situ stabilization of TCE, 1,1,2,2-TCA, and related daughter products was conducted at Marine Corps Base Camp Lejeune, North Carolina. About 22,900 m3 of soils were treated to an average depth of 7.6 m with 2% ZVI and 3% sodium bentonite (dry weight basis). After one year, total concentrations of chlorinated VOCs in soil samples had decreased by site-wide average and median values of 97% and >99%, respectively. Total chlorinated VOC groundwater concentrations fell by average and median values of 81% and >99%, respectively.
Combined Isco, Erd, and Biobarrier Strategy for DNAPL Site at Camp Lejeune
Posted: October 7, 2012
Dry cleaning activities at Site 88 released PCE, which resulted in a DNAPL plume along with a 0.75-mile groundwater plume. The PCE source area was treated successfully using soil mixing with zero-valent iron and clay addition. From October through December 2010, the groundwater plume was treated using in situ chemical oxidation with 2.5% potassium permanganate at a depth of 50 ft, and enhanced reductive dechlorination with SRS® and bioaugmentation at a depth of 100 ft. In addition, an injected biobarrier containing Three-Dimensional Microemulsion (3DMe™) with bioaugmentation was installed to intercept and treat the downgradient groundwater flow. The anticipated treatment radius of influence was not met, but where substrate or chemical oxidant was distributed, promising results were observed.
Successful Field Scale Removal of PCB Soil Contamination at a Remote Former Loran Station Site
Posted: October 7, 2012
At a dump area contaminated with PCBs from disposal of transformers and other electrical equipment during the Coast Guard's former use of Kure Atoll (Northwest Hawaiian Islands) as a long-range navigation (LORAN) station, soils excavated from a pit sized 4 ft by 4 ft by 4.5 ft were subjected to a series of soil washing and grain size separation treatments. The work was undertaken to develop an effective on-island means of treating PCB-contaminated material to minimize the volume of contaminated material requiring off-island transport. The optimized process achieved 75 to 95% PCB removal. Poster:
Source Area Mip Investigation and Pilot-Scale Groundwater Remediation Using Activated Persulfate
Posted: October 7, 2012
A pilot test of in situ chemical oxidation (ISCO) was performed at a site in Southern California in 2010 to address residual gasoline free product and high concentrations of BTEX and MTBE. Results from a membrane interface probe investigation to characterize the lithology and total VOCs in the source area in high resolution were used to design the ISCO injection grid. A mixture consisting of 6,600 lbs of sodium persulfate mixed with 660 pounds of iron EDTA and water was injected across the top 10 ft of the saturated zone using direct-push methods. Persulfate distribution and oxidation were achieved within the injection zone and as far as 20 ft cross-gradient and 35 ft downgradient of the injection zone. Although the iron-activated persulfate effectively reduced dissolved-phase VOC concentrations, rebound was observed.
Clamshell Vs. Backhoe Excavation of Permeable Reactive Barriers
Posted: October 7, 2012
A comparison of the clamshell and backhoe excavation techniques for permeable reactive barrier (PRB) installation shows that backhoes permit a rapid rate of excavation and generally require less skill to master, whereas clamshell excavators require more skill to use. Long stick backhoes can excavate as deep as 30 m, but clamshells can excavate to a depth of more than 70 m with a high degree of precision. The availability of instrumentation, excavation power and precision, and potential for cost savings of the two techniques are compared using two PRB case studies: (1) a funnel-and-gate system excavated by long stick backhoe, whose longest gate is 0.73 m thick, 68 m long, and up to 13 m deep, and (2) a continuous trench configuration, 0.6 m thick, 120 m long, and 13 m deep, excavated by crane-mounted grab.
Chemical Techniques for Assessing Bioavailability of Sediment-Associated Contaminants: Spme Versus Tenax Extraction
Posted: October 7, 2012
Both chemical activity (freely dissolved chemical concentrations) measured by solid-phase microextraction (SPME) and bioaccessibility (rapidly desorbing fraction) estimated by Tenax extraction have been developed to predict bioavailability of sediment-associated hydrophobic organic contaminants (HOCs). This review summarizes studies using matrix-SPME or Tenax extraction to estimate bioavailability and/or toxicity of different classes of HOCs and to evaluate the strengths and weakness of these two techniques. SPME fibers can be used in situ and have potential usage for a wide array of contaminants by selection of appropriate coatings, while single-time-point Tenax extraction is more time- and labor-effective and has lower detection limits, making it more applicable for highly toxic contaminants.
Monitored Natural Attenuation Technical Guidance
Posted: October 7, 2012
This document discusses how to monitor the natural attenuation of organic compounds (particularly petroleum hydrocarbons and chlorinated solvents), inorganics, and radionuclides at New Jersey groundwater sites. Numerous references are listed for additional information, and excerpts from selected references are provided in the appendices.
Site-Specific Work Plan [Monitored Natural Attenuation]: Brown & Bryant Superfund Site, 600 South Derby Street, Arvin, California
Posted: October 19, 2012
This plan describes the actual performance of the natural attenuation remedy. It is expected that by using a predictive model, the rate of attenuation of the contaminants of concern (1,2-dichloropropane, 1,3-dichloropropane, 1,2,3-trichloropropane, chloroform, Dinoseb, 1,2-dibromo-3-chloropropane, and ethylene dibromide) can be described, thus providing a measure to gauge progress. If monitoring data indicate that the contaminant levels do not continue to decline in accordance with expectation as defined by this model, USACE and EPA will reconsider the remedy decision.
In Situ Bioremediation of Energetic Compounds in Groundwater: ESTCP Cost and Performance Report
Posted: October 19, 2012
At the Picatinny Arsenal in Dover, New Jersey, a recirculation cell design with semi-passive operation was employed successfully to distribute and mix a cheese whey co-substrate with contaminated groundwater to promote the biodegradation of TNT, RDX, and HMX by indigenous bacteria. In addition to technical performance, the demonstration provided the capital and O&M costs of this type of system at a scale that can be extrapolated to different full-scale designs.
Electrokinetic Remediation and Its Combined Technologies for Removal of Organic Pollutants From Contaminated Soils
Posted: October 19, 2012
This paper reviews six types of electrokinetic (EK) remediation applications for soil contaminated with organic compounds: the direct EK technique, EK combined with Fenton's reagent, EK combined with surfactants or co-solvents, EK combined with bioremediation, EK combined with ultrasonic remediation, and the technology known as Lasagna. Basic principles, characteristics, application areas, research developments, and prospects are described for these six techniques. The technology combinations, contaminant types, soil types, and reported removal efficiencies are compiled into a table, with references to the source material.
Development of a Design Tool for Planning Aqueous Amendment Injection Systems &Mdash; Soluble Substrate Design Tool: Final Report & User's Guide
Posted: October 19, 2012
Soluble substrate has been used at hundreds of sites to generate anaerobic conditions and enhance in situ anaerobic biodegradation or immobilization of chlorinated solvents, perchlorate, explosives, nitrate, and chromium. Typically, the soluble substrate is diluted with water and then injected using a series of wells. In some cases, a pH buffer or other amendment may be included to further enhance biodegradation. A simple spreadsheet-based tool developed to assist in the design of injection-only systems for distributing soluble substrate allows quick comparison of the relative costs and performance of different injection alternatives and identification of the design best suited to site-specific conditions.
Protocol for Tier 2 Evaluation of Vapor Intrusion at Corrective Action Sites
Posted: October 19, 2012
Project ER-0707 has validated two improved methods for evaluation of vapor intrusion at corrective action sites: (1) a Tier 2 screening procedure for evaluation of vapor intrusion from VOCs in groundwater at sites with fine-grained soils at the top of the water table and (2) a streamlined Tier 3 investigation program using building pressure control for application at sites that require building-specific investigations. The Tier 2 screening procedure and the Tier 3 investigation procedure were validated though field demonstrations conducted at seven and six sites, respectively.
Total Chromium and Hexavalent Chromium Occurrence Analysis
Posted: October 19, 2012
This white paper summarizes the state of knowledge on total chromium and hexavalent chromium occurrence. The paper is based on an analysis of total and hexavalent chromium occurrence data that compared datasets from WaterRF, U.S. EPA, and the California Department Public Health for spatial and temporal relationships.
State of the Science of Hexavalent Chromium in Drinking Water
Posted: October 19, 2012
U.S. EPA is currently considering whether or not to establish a drinking water maximum contaminant level specifically for hexavalent chromium. The goal of this review is to better inform potential regulatory action on this issue by summarizing briefly what is known about hexavalent chromium and pointing out gaps in current knowledge. The review does not cover all aspects of the health effects of hexavalent chromium.
