U.S. EPA Contaminated Site Cleanup Information (CLU-IN)

U.S. Environmental Protection Agency
U.S. EPA Technology Innovation and Field Services Division

Recent Additions

Open Solicitation: EPA's 2019-2020 Small Business Innovation Research (SBIR) Phase I

Posted: June 14, 2019

EPA is calling for small businesses to apply for Phase I awards up to $100,000 to demonstrate proof of concept in the following topic areas: clean and safe water, air quality, land, homeland security, sustainable materials management and safer chemicals. Successful Phase I companies are eligible to apply for Phase II funding, which awards up to $400,000 for two years with a commercialization option of up to $100,000, to further develop and commercialize their technologies. Applications are due by July 31, 2019.

FY 2020 Brownfields Environmental Workforce Development and Job Training (EWDJT) Grants

Posted: May 1, 2019

These grants are provided to eligible entities, including nonprofit organizations, to deliver Environmental Workforce Development and Job Training programs that recruit, train, and place local, unemployed and under-employed residents with the skills needed to secure full-time employment in the environmental field. Each Environmental Workforce Development and Job Training (EWDJT) grant may be funded up to $200,000 over a three year period. The proposal submission deadline is June 10, 2019.

In Situ Chemical Oxidation: Lessons Learned at Multiple Sites

Posted: April 18, 2019

This paper compiles a detailed set of in situ chemical oxidation (ISCO) lessons learned pertaining to design, execution, and safety based on global experiences over the last 20 years. While the benefits of a correct application are known, history also provides examples of a variety of incorrect applications that provide an opportunity to highlight recurring themes that resulted in failures. This paper combines a thorough discussion of lessons learned through decades of ISCO implementation throughout all aspects of ISCO projects with an analysis of changes to the ISCO remediation market. By discussing the interplay of these two themes and providing recommendations from collective lessons learned, the future of safe, cost-effective, and successful applications of ISCO can be improved.

Post-Remediation Evaluation of Evo Treatment: How Can We Improve Performance?

Posted: April 18, 2019

Conclusions and lessons learned in this demonstration project were integrated with prior lab and field studies to generate a general conceptual model of enhanced reductive dechlorination (ERD) with emulsified vegetable oil (EVO) and pH buffer. The conceptual model on which this design tool is based provides a relatively concise summary of the current understanding of ERD with EVO, including (1) ERD microbiology and organohalide respiration; (2) environmental requirements for efficient dechlorination; (3) EVO properties, transport and retention in the subsurface; (4) EVO consumption during ERD; (5) aquifer pH and buffering; and (6) injection system design. Design tool:

Demonstration/Validation of More Cost-Effective Methods for Mitigating Radon and VOC Subsurface Vapor Intrusion to Indoor Air

Posted: April 18, 2019

New lines of evidence and mathematical modeling were developed to aid in the design and performance monitoring of subslab venting systems for mitigation of radon and VOC vapor intrusion to protect the health of building occupants from inhalation exposures. Results indicate that system performance depends strongly on the relative permeability of the floor slab and the material below the floor slab, and that both parameters can be determined with reasonable confidence using tests and analysis that are rapid and affordable. Where coarse granular fill is present below a high quality floor slab, the radius of influence may extend to considerable distances, which reduces the number of suction points required and the associated capital cost. Where a system already exists, mass emission monitoring may help reduce the operation, maintenance, and monitoring costs.

Source Barrier Tool: Contaminant Flux Reduction Barriers for Managing Difficult-To-Treat Source Zones in Unconsolidated Media

Posted: April 18, 2019

This tool explains the potential benefits of a physical barrier around a chlorinated solvent source zone and helps the user understand if a barrier would work at a particular site. The overall objective of this project was to evaluate if inexpensive flow reduction agents delivered via permeation grouting technology could help manage difficult-to-treat chlorinated solvent source zones, or any other source zone comprising contaminants that degrade primarily via anaerobic biodegradation processes inhibited by naturally occurring competing electron acceptors, such as oxygen and sulfate.

Overview of In Situ and Ex Situ Technologies in Development for the Treatment of Per- and Polyfluoroalkyl Substances

Posted: April 18, 2019

This webinar covers conventional and innovative technologies to address PFASs in water and soil. Remediation of groundwater often requires a treatment train, combining conventional sorbents and engineered filtration with more innovative and emerging remediation solutions for PFASs. While in situ soil stabilization is a promising technique, ongoing research and development is being conducted to evaluate the longevity of fixation amidst circumneutral pH and biotransformation, which may enhance PFAS dissolution. Remediation of PFAS source zones and the associated groundwater plumes presently requires multiple technologies to protect human health in a cost-conscious manner. See a recording of the presentation at

Analysis of Long-Term Performance of Zero-Valent Iron Applications

Posted: May 7, 2019

The long-term performance of zero-valent iron (ZVI) is detailed in this report both as a source-zone treatment and as a barrier treatment for chlorinated VOCs. The project approach consisted of both desktop review and field assessment. The field assessment was conducted at two sites: (1) a ZVI permeable reactive barrier for dissolved-phase TCE/DCE plume control assessment at Allegany Ballistics Laboratory Site 5, and (2) ZVI introduction by soil mixing in a PCE/TCE/DCE source area at the St. Louis Ordnance Plant OU1.

Full-Scale Fixed-Bed Biological Perchlorate Destruction Demonstration: Construction of a Fixed-Bed Bioreactor Wellhead Treatment System

Posted: May 17, 2019

The efficacy of a 2-stage, fixed-bed biological treatment (FXB) system to address perchlorate-contaminated groundwater was evaluated at a facility in Rialto, Calif., alongside a fluidized bed bioreactor to enable comparison of the performance of the two biological treatment systems. Operation of the full-scale FXB system began on November 9, 2017, demonstrating successful removal of perchlorate (plus complete and consistent removal of 1.85 µg/L of TCE) and producing water that met all performance goals and water quality objectives. This report presents key findings and lessons learned from the project, including optimal chemical dose, backwash frequency, and plant hydraulics to be incorporated in future designs and operations.