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

Programmed Calculators for Dioxin Toxicity Equivalence (TEQ)

Posted: January 8, 2015

Two types of Excel-based calculators are available for calculating TEQ for the relevant dioxin, furan, and dioxin-like PCB (polychlorinated biphenyl) congeners in soil or water samples. These demonstrations provide a description of two publicly available macro-driven spreadsheets that calculate dioxin TEQ from congener results: an Advanced TEQ Calculator and a Basic TEQ Calculator.

Summary of Treatment Technologies for Mining-Influenced Water

Posted: January 5, 2015

The U.S. EPA Office of Superfund Remediation and Technology Innovation released a report in 2014 that highlights select mining-influenced water (MIW) treatment technologies used or piloted as part of remediation efforts at mine sites. The Reference Guide to Treatment Technologies for Mining-Influenced Water Adobe PDF Logo includes short descriptions of treatment technologies and information on the contaminants treated, pre-treatment requirements, long-term maintenance needs, performance, and costs. Sample sites illustrate considerations associated with selecting a technology. Website links and sources for more information on each topic are also included.

This online, searchable database lists technologies provided in Appendix A of the Reference Guide to Treatment Technologies for Mining-Influenced Water, which includes summary information for the technologies discussed in the body of the report, as well as additional technologies or products designed as passive or low cost treatment options.

Popular Four Paid Postgraduate Internships with EPA's Office of Superfund Remediation and Technology Innovation

Posted: December 30, 2014

EPA's Office of Superfund Remediation and Technology Innovation in Arlington, Virginia has four paid postgraduate internships available through the Oak Ridge Institute for Science and Education. The internships are full-time for one year and are renewable for up to three additional years. Candidates must have with degrees earned within the last five years related to environmental engineering/chemical engineering, soil science, chemistry and toxicology/risk assessment.

Field Demonstration of Zerovalent Iron Treatment Technology in Parker Brothers Arroyo: Status Report

Posted: January 20, 2015

Environmental impacts from historical smelting operations are present within and outside the site of the former ASARCO smelter (El Paso, Texas). In Parker Brothers Arroyo, the site contractor completed construction of two in situ zero-valent iron (ZVI)-based permeable reactive barriers (PRBs) in October 2012 and the performance monitoring network in June 2013. This status report presents construction details for the PRBs with subsequent performance results. The objectives of the field demonstration are to verify the effectiveness of the ZVI PRB technology for concentrations of arsenic, antimony, selenium, and thallium above regulatory requirements at this site, initiate groundwater remediation, and provide data to support the final site-wide groundwater remedy.

Conceptual Remedial Design Plan: Former Romic Environmental Technologies Corporation Facility, 2081 Bay Road, East Palo Alto, California

Posted: January 6, 2015

This site formerly served as a hazardous waste management facility for solvent recycling, fuel blending, wastewater treatment, and hazardous waste storage and treatment. VOCs (PCE, TCE, BTEX) have been detected at elevated concentrations in several site areas, and DNAPL is also believed to be present. The proposed treatment option to remediate VOC-impacted vadose zone soils calls for installation of horizontal injection wells, which will be connected to an in situ delivery (ISD™) groundwater recirculation system to deliver anaerobic substrates (i.e., CarBstrate™) to the subsurface to promote complete anaerobic dechlorination of chlorinated VOCs, followed by monitored natural attenuation of residual contamination. Once monitoring data show that chlorinated VOCs have reached an asymptotic state, EPA will be petitioned for approval to allow ISD system changeover to deliver aerobic substrates (EZT-A2™ consortium, PetroSolv™ surfactant, and CBN™ nutrient mix) to promote aerobic biodegradation of fuel-related compounds. An ISD groundwater recirculation system is also proposed to address VOC-impacted groundwater within the A-, B-, and C-zone aquifers beneath the site.