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

ITRC 2015 Spring Meeting, Pittsburgh, PA, April 20-24, 2015

Posted: March 23, 2015

The 2015 Spring Meeting offers environmental professionals from across the country an opportunity to network and collaborate on innovative approaches to solving environmental challenges. The meeting offers work sessions for all 2015 ITRC Teams, information about ITRC's direction from the ITRC Board of Advisors and Director, and opportunities to expand your network in the environmental community.

2015 National Brownfields Training Conference, Chicago, IL, September 2-4, 2015

Posted: March 23, 2015

Brownfields 2015 promises something for all levels of stakeholders and practitioners. The conference program includes speakers, discussions, mobile workshops, films, and other learning formats that are calibrated to provide you with case study examples, program updates, and useful strategies for meeting your brownfield challenges head on.

Winter 2015 Technology News and Trends

Posted: March 2, 2015

This issue highlights approaches for improving and streamlining site cleanup through a broad strategy that begins with upfront planning with an eye toward project completion, as described in the U.S. EPA's fiscal year 2014 Superfund Remedial Program Review Action Plan. EPA's plan describes short- as well as long-term measures and activities the Agency is undertaking to maintain an effective remedial cleanup program under Superfund program budget constraints. An important component of the plan is the use of an adaptive management process-an iterative approach to site investigation and remedy implementation that facilitates responding to new information and conditions throughout the lifecycle of a site. The plan also focuses on assessment, study, design and construction phases of the remedial process and outlines modified priorities for related resource management to be combined with additional increases in efficiencies. The projects featured in this issue illustrate ways to more effectively compile information as part of optimizing the design, implementation and monitoring of remedies and to strategically schedule key activities accordingly.

Groundwater Geochemical and Selected Volatile Organic Compound Data, Operable Unit 1, Naval Undersea Warfare Center, Division Keyport, Washington, July 2013

Posted: March 4, 2015

Previous investigations indicate that concentrations of chlorinated VOCs (CVOCs) are substantial in groundwater beneath the 9-acre former landfill at Operable Unit 1. The U.S. Geological Survey has continued to monitor groundwater geochemistry to ensure that conditions remain favorable for contaminant biodegradation. A remedy developed in 1998 for contaminated groundwater at OU 1 included phytoremediation and ongoing natural attenuation processes to remove and control CVOC migration in shallow groundwater. In 1999 the U.S. Navy planted hybrid poplar plantations in two areas on the landfill where contaminant concentrations in groundwater were exceptionally high. To determine remedy effectiveness, USGS has monitored geochemistry and contaminant concentrations in groundwater and surface water, along with tree health and water levels, annually from 2001 through 2013 to evaluate reduction-oxidation (redox) conditions and CVOC biodegradation. This report discusses conclusions drawn from groundwater geochemical and selected CVOC data collected by USGS at OU 1 during July 9-12, 2013, and on July 18, 2013.

Enhanced Amendment Delivery to Low Permeability Zones for Chlorinated Solvent Source Area Bioremediation: ESTCP Cost and Performance Report

Posted: March 4, 2015

The overall goal of this project was to demonstrate and validate the use of shear-thinning delivery fluid for enhanced delivery of bioremediation amendments at a low-permeability site impacted by chlorinated solvent and to develop guidance for its use at other sites. The technology demonstration was performed using a combination of xanthan gum (shear-thinning polymer) and ethyl lactate (carbon substrate) to promote biological reductive dechlorination in a low-level TCE plume at Joint Base Lewis-McChord. A significant portion of the amendment persisted through the end of the 8-month performance monitoring period, with evidence for enhanced persistence in the lower-k zones relative to higher-k zones. The amendment resulted in the complete degradation of TCE throughout the heterogeneous treatment zone, with no evidence of rebound.

Vogel Paint and Wax Company Superfund Site, Sioux County, Maurice, Iowa: Fourth Five-Year Review Report

Posted: March 18, 2015

The Vogel plant in Orange City, Iowa, used the site in Maurice for disposal of paint sludge, resins, solvents and solid waste, which led to soil and groundwater contamination with zinc, lead, chromium, mercury, toluene, xylenes, naphtha, methyl ethyl ketone, and methyl isobutyl ketone. The state is the lead agency for the site. Soil excavation and bioremediation/landfarming was initiated in 1991 and completed in 1999. In 2000, soils with high lead levels were stabilized/solidified by adding and mixing agricultural lime until acceptable TCLP results were obtained. Installation of a currently operating bioventing system was completed in 2001. Groundwater pump and treat was operated 1992-2004 and since has been off line. Enhanced free product recovery was completed in December 2000. Vogel initiated a 1-acre phytoremediation pilot study in 2007 at the original source area and planted additional trees on 2.5 acres in 2008. The trees were observed to be in good health during the site visit. Contaminant concentrations in nearby monitoring wells generally have been stable during the five-year review period. The site currently relies on phytoremediation and natural attenuation to remediate and contain the contaminated groundwater.

Attenuation Pathways for Munitions Constituents in Soils and Groundwater

Posted: March 18, 2015

This report summarizes recent research findings related to munitions constituent (MC) attenuation pathways in soil and groundwater and discusses lessons learned from monitored natural attenuation and bioremediation applications for MC at DoD sites. The report's scope includes MC issues; physical, chemical, and biological attenuation pathways; technology applications; and eight case studies.