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

12th International Phytotechnologies Conference, Manhattan, KS, September 27-30, 2015

Posted: August 27, 2015

This conference, hosted by Kansas State University, will provide scientists, engineers, consultants, policy regulators and other interested individuals the opportunity to explore and discuss how recent developments in phytotechnologies address current and emerging environmental challenges. Phytotechnologies refer to plant-based technologies to clean water, soil, air, and provide ecosystem services including energy from biomass.

9th Symposium on Design & Construction Issues at Hazardous Waste Sites, April 20-22, 2016

Posted: August 27, 2015

The applications of engineering and science associated with cleaning up hazardous waste sites continue to evolve rapidly. The goal of this symposium, co-hosted by the Society of American Military Engineers (SAME) Philadelphia Post and the U.S. EPA, is to facilitate an interactive engagement between professionals from government and the private sector related to relevant and topical issues affecting our field. Abstracts are due by October 16, 2015.

Geophysical Classification for Munitions Response

Posted: August 27, 2015

Geophysical classification is a new technology in which buried metal items (such as scrap metal or unexploded ordnance) are detected on a site. With the use of new instruments and advanced geophysics, the buried items are classified to determine whether they are munitions that should be removed or metal clutter, debris, or geology that can be left in the ground. This web-based guidance document explains the process of geophysical classification, describes its benefits and limitations, and most importantly discusses the information and data needed by regulators to monitor and evaluate the use of the technology. This document also emphasizes using a systematic planning process to develop data acquisition and decision strategies at the outset of a munitions response effort, as well as quality considerations throughout the project. Stakeholder issues that are unique to munitions response are also discussed.

Remediation of Bay Shore Former Manufactured Gas Plant, Site 1-52-172, Bay Shore, Ny

Posted: August 18, 2015

Substantial remediation progress has been made since major construction began in 2007 to support the cleanup activities in Bay Shore. Since October 2012, National Grid conducted or continued remedial activities at all four of the site's operable units. Although cleanup is not complete, contaminant levels for BTEX and PAHs are down sharply throughout the site, and this trend is expected to continue. All major construction is complete. The work entailed excavation of source areas to ~16-25 ft based on field conditions; removal and off-site thermal desorption of contaminated soil; in situ chemical oxidation using ozone to treat residual contamination beneath the excavated areas; installation of a subsurface barrier wall at the downgradient edge of OU-1 with in situ groundwater treatment immediately upgradient of the barrier; recovery of mobile water gas tar and DNAPL via extraction wells where practicable; and extensive use of oxygen injection to enhance bioremediation. See the Bay Shore Works website for project reports and other information, including progress videos:

Demonstration and Validation of a Fractured Rock Passive Flux Meter

Posted: August 18, 2015

A new closed-hole passive sensing technology for fractured media, the Fractured Rock Passive Fluxmeter (FRPFM), provides simultaneous measurement of 1) the presence of flowing fractures; 2) the location of active or flowing fractures; 3) active fracture orientation, i.e., dip and azimuth; 4) direction of groundwater flow in each fracture; 5) cumulative magnitude of groundwater flux in each fracture; and 6) cumulative magnitude of contaminant flux in each fracture. Other technologies exist to measure 1, 2, and 3 above; however, the FRPFM is the only technology that also measures 4, 5, and 6. Field tests were conducted at two chlorinated solvent-contaminated fractured rock sites. In 16 field tests, the FRPFM achieved the standard in each of the six quantitative performance objectives. A cost assessment indicates that FRPFM implementation is competitive with alternative technologies, none of which can provide the full suite of FRPFM capabilities. A key distinction, however, is that the FRPFM generates high-resolution measures over a specified interval and is best used for characterizing targeted borehole depth intervals, not for screening conditions over an entire borehole. Enviroflux Inc. has exclusive rights to commercialize the FRPFM technology.

Development of More Cost-Effective Methods for Long-Term Monitoring of Soil Vapor Intrusion to Indoor Air Using Quantitative Passive Diffusive-Adsorptive Sampling

Posted: August 18, 2015

This report documents a demonstration/validation of passive diffusive samplers for assessing soil vapor, indoor air, and outdoor air concentrations of VOCs at sites with potential human health risks attributable to subsurface vapor intrusion to indoor air. The passive samplers tested were the 1) SKC Ultra and Ultra II, 2) Radiello®, 3) Waterloo Membrane Sampler, 4) Automated Thermal Desorption tubes, and 5) 3M OVM 3500. The program included laboratory testing under controlled conditions for 10 VOCs (including chlorinated ethenes, ethanes, and methanes, and aromatic and aliphatic hydrocarbons) spanning a range of properties and including some compounds expected to pose challenges (naphthalene and methyl ethyl ketone). The samplers also were field tested on indoor air, outdoor air, subslab vapor, and deeper soil vapor at several DoD facilities. All of the passive samplers provided data that met the success criteria under some or most conditions. Most of the passive samplers provided highly reproducible results throughout the demonstrations. Overall costs of monitoring with passive samplers were comparable to or lower than monitoring with conventional methods because of the simplicity of the sampling protocols and reduced shipping charges. The study team comprised individuals highly experienced with passive samplers in general and each of the five samplers tested in particular.

Perfluorinated Chemicals (Pfcs): Perfluorooctanoic Acid (Pfoa) & Perfluorooctane Sulfonate (Pfos): Information Paper

Posted: August 18, 2015

Although many chemicals fall into the generic family of perfluorinated compounds (PFCs), this paper focuses on PFOA and PFOS, the two PFCs most commonly researched and most prevalent in the environment. This document introduces information and resources specific to PFCs and their persistence in the environment; summarizes policy and program decisions implemented at federal facilities and other cleanup sites within the United States; and presents a case study of PFAS contamination at the former Wurtsmith Air Force Base.