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Cleanup Design and Implementation
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| Develop and Carry Out Detailed Cleanup Plans for the Site |
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The cleanup design and implementation phase focuses on developing and
carrying out a cleanup plan to prepare the property for redevelopment
and reuse. The design of the cleanup plan and implementation of the technology
options selected in the previous phase involves close coordination with
all other redevelopment efforts in the immediate vicinity of the site.
| What Do We Need to Know? |
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Factors that should be considered during the design and implementation
of cleanup activities include:
- Are there federal, state, local, and tribal requirements for the
design, installation, and monitoring of cleanup activities?
- How will cleanup be monitored so that work can be stopped when cleanup
goals are reached?
- How best can the community participate in the design and implementation
of the cleanup plan?
- What can be done to protect the community and other property during
cleanup?
- What are the tradeoffs between cost and meeting redevelopment project
deadlines? Can redevelopment activities (such as renovation of existing
buildings and construction of roads and sewage systems) be performed
concurrently with cleanup activities?
- What are the long-term effects of the selected technology on the liability
or on the future use of the site? What are the effects of a catastrophic
change to the environment (for example, a hurricane or changes to the
subsurface)?
- Will long-term monitoring be required? If so, how will it be managed?
- Will institutional controls facilitate or hinder redevelopment? Now?
In the future?
| How Do We Find the Answers? |
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Typical activities that may be conducted during this phase include:
- Review all applicable federal, state, local, and tribal regulatory
guidelines and regulations to determine all specific requirements, including
guidelines for state VCPs
- Continue to work with the appropriate regulatory agencies to ensure
that regulatory requirements are being properly addressed:
- Consult with the appropriate federal, state, local, and tribal
regulatory agencies to include them in the decision-making process
as early as possible
- Contact the EPA
regional brownfields coordinator to identify and determine the
availability of EPA support programs
- Develop conceptual plans for cleanup and subsequent monitoring that
incorporate technology options and consider the effect of any cleanup
activities on the proposed reuse of the property and the schedule for
project design or construction:
- Develop or review the schedule for completion of the project
- Obtain a final amount for the funds available for project development
- Coordinate the renovation and construction of infrastructure
with cleanup activities
- Coordinate activities with developers, financiers, construction
firms, and members of the local community
- Establish contingency plans to address the discovery of additional
contamination during cleanup, including tools such as environmental
insurance policies
- Develop procedures for community participation, for example, by working
with community advisory boards or local redevelopment authorities
- Implement and monitor the cleanup plan and performance of the technology
selected
- Work with the state VCP, if applicable, and/or county or local officials
to facilitate the placement and implementation of institutional controls
| Where Do We Find Answers to Our Technology Questions? |
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Show all resources as one list
Listed below are examples of technology resources that provide information
about cleanup designs and implementations including regulatory guidelines
and community outreach materials. In addition, technologies identified
during the site investigation phase may be appropriate to monitor cleanup
performance and close-out.
A. Resources for Cleanup Design and Implementation
The documents listed below are resources that provide general information
about the availability of technology resources in the form of bibliographies
and status reports. Online searchable databases also are included.
Characterization of Mine Leachates and the Development of a Ground-Water Monitoring Strategy for Mine Sites EPA 600-R-99-007 |
| The objective of the research project was to develop a better understanding of the composition of mine waste leachates and to identify cost-effective groundwater monitoring parameters that could be incorporated into a monitoring strategy to reliably detect the migration of contaminants from hard rock mining operations. |
| Citizen's Guides to Understanding Innovative Treatment Technologies |
| The guides are prepared by EPA to provide site managers with nontechnical outreach materials that they can share with communities in the vicinity of sites. The guides present information on innovative technologies that have been selected or applied at some cleanup sites, provide overviews of the technologies, and present success stories about sites at which innovative technologies have been applied. Both English and Spanish versions of the guides are available. The guides contain information on the following subjects: |
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Activated carbon treatment (EPA 542-F-01-020) |
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Air stripping (EPA 542-F-01-016) |
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Bioremediation (EPA 542-F-01-001) |
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Capping (EPA 542-F-01-022) |
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Chemical dehalogenation (EPA 542-F-01-010) |
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Chemical oxidation (EPA 542-F-01-013) |
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Fracturing (EPA 542-F-01-015) |
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In situ flushing (EPA 542-F-01-011) |
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In situ thermal treatment methods (EPA 542-F-01-012) |
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Incineration (EPA 542-F-01-018) |
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Monitored natural attenuation (EPA 542-F-01-004) |
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Permeable reactive barriers (EPA 542-F-01-005) |
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Phytoremediation (EPA 542-F-01-002) |
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Pump and treat (EPA 542-F-01-025) |
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Soil excavation (EPA 542-F-01-023) |
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Soil vapor extraction (SVE) and air sparging (EPA 542-F-01-006) |
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Soil washing (EPA 542-F-01-008) |
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Solidification/stabilization (EPA 542-F-01-024) |
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Solvent extraction (EPA 542-F-01-009) |
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Thermal desorption (EPA 542-F-01-003) |
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Vitrification (EPA 542-F-01-017) |
Design Solutions for Vapor Intrusion and Indoor Air Quality EPA 500-F-04-004 |
| This fact sheet, compiled by EPA OSWER, provides an overview of technical and health issues regarding vapor intrusion into indoor air and its effect on land redevelopment. The fact sheet discusses how to anticipate the potential for vapor intrusion; evaluate the extent of the problem; and prevent or correct the problem. |
Directory of Technical Assistance for Land Revitalization (BTSC) EPA 542-B-03-001 |
| BTSC has prepared this directory to provide information about technical assistance that is available from federal agencies to assist regional, state, and local government personnel in making assessment and cleanup decisions for brownfields, reuse, and revitalization sites. This directory includes information about 37 organizations within 10 federal agencies that provide different types of support to help with site assessment and cleanup, including technical support and funding sources. Profiles are included for these agencies and organizations and contain the following types of information: background and location information, relevancy to revitalization, description of the areas of expertise available, discussion of the types of services available, types of funding available and eligibility, contact information and the process for requesting assistance, and examples of specific instances in which the organization has previously provided support relevant to site revitalization. Information in the profiles is believed to be current as of March 2003. To help maintain current information, the directory is available as an online searchable database at www.brownfieldstsc.org/directory. |
| EPA REmediation And CHaracterization Innovative Technologies (REACH IT) Online Searchable Database |
| The EPA REACH IT online searchable databases sponsored by EPA's OSRTI is a service provided free of charge to both users and technology vendors. EPA REACH IT is accessible only through the Internet. This database provides users with comprehensive, up-to-date information about more than 254 characterization technologies and 484 remediation technologies and their applications. It combines information submitted by technology service providers about remediation and characterization technologies with information from EPA, DoD, DOE, and state project managers about sites at which innovative technologies are being deployed. During the preliminary phase of a brownfields project, EPA REACH IT will assist brownfields stakeholders to learn about and become familiar with the range of available technology options that can be employed during the investigation and the cleanup phases that follow, as well as data about various types of sites. Information about analytical screening technologies that may be useful for initial sampling of a site also is provided. EPA updates all of the information available in the system about every six months. Technology vendors may also add or update information in EPA REACH IT at any time through the Data Entry System or by submitting information by mail. You can search the EPA REACH IT system in several ways. Various search options are available for a user on the home page, including Custom Search; Spotlight; Most Common Searches; Saved Searches; Guided Search; and Vendor, Technology, and Site Index. For questions about whether a technology is eligible for listing in EPA REACH IT, the user may contact the EPA REACH IT help line at (800) 245-4505 or (703) 390-0713 or send an e-mail to epareachit@ttemi.com. |
| Federal Remediation Technologies Roundtable Case Studies |
| The case studies provide the user with information about specific characterization and remediation, technology optimization applications. Four focus areas have been established by FRTR for providing performance and cost information on technology applications: remediation case study reports, characterization and monitoring case study reports, technology assessment reports, and LTM/optimization case study reports. FRTR case studies are developed by DoD, USACE, the U.S. Navy, the U.S. Air Force, DOE, DOI, and EPA. The case studies focus on full-scale and large field demonstration projects and include site background information, technology description, cost and performance information, and lessons learned. The technologies include innovative and conventional treatment technologies for contaminated soil, groundwater, and solid media. Users can search the case studies by groups of contaminants, media, waste management practices that contribute to contamination, and treatment systems. |
| Federal Remediation Technologies Roundtable Remediation Optimization Web Site |
| Remediation process optimization (RPO) involves systematic monitoring and evaluation to detect and respond to changes in remedial system performance. System optimization offers benefits that include enhanced protectiveness, reduced cost, shortened cleanup times, and the increased likelihood of site close-out. The Web site includes a searchable database of optimization case studies, meeting and conference materials from events related to remediation system optimization, general optimization tools and processes, descriptions of broad-based optimization projects, definitions of optimization acronyms, and a list of RPO points of contact. Monitoring optimization includes approaches for increasing efficiency, reducing cost, identifying uncertainty, and increasing reliability of long-term monitoring. Simulation optimization involves the use of mathematical optimization techniques coupled with groundwater simulation models to determine optimal pumping locations and rates for plume containment and/or cleanup. Treatment technology optimization includes information on specific in situ and ex situ remedial technologies. |
| Improving the Cost-Effectiveness of Hazardous Waste Site Characterization and Monitoring |
| The report introduces a new standard promoted by EPA's OSWER and OSRTI that encourages more effective and less costly strategies for characterizing and monitoring hazardous waste sites. The new approach uses an integrated triad of systematic planning, dynamic work plans, and on-site analysis for data collection and technical decision-making at hazardous waste sites. Individually, none of the concepts in the Triad approach is new, but it has been demonstrated that the integrated approach completes projects faster, cheaper, and with greater regulatory and client satisfaction than the traditional phased approach. The report includes a list of additional resources regarding innovative technologies and site characterization. |
Institutional Controls: A Site Manager's Guide to Identifying, Evaluating, and Selecting Institutional Controls at Superfund and RCRA Corrective Action Cleanups EPA 540-F-00-005 |
| The fact sheet provides site managers and decision-makers at Superfund and RCRA corrective action sites with an overview of the types of institutional controls that commonly are used or implemented and outlines the factors that generally should be considered when evaluating and selecting institutional controls as part of the remedy. The fact sheet also provides guidance to the public and the regulated community in the matter of how EPA intends to evaluate and implement institutional controls as part of cleanup decisions. Detailed descriptions of the different types of institutional controls are provided, as are a glossary and a checklist for implementing institutional controls. |
| OSWER Draft Guidance for Evaluating the Vapor Intrusion to Indoor Air Pathway from Groundwater and Soils (Subsurface Vapor Intrusion Guidance) |
| This draft guidance, issued by EPA OSWER, provides current technical and policy recommendations on determining if the vapor intrusion pathway poses an unacceptable risk to human health at cleanup sites. At the time of issuing this draft guidance, OSWER has recommended its use at RCRA Corrective Action sites, Superfund sites and brownfields sites, but not for UST sites. The draft document is intended to serve as an aid in evaluating the potential for human exposure from the vapor intrusion pathway given the state-of-the-science at this time. EPA believes that the document provides relevant information and guidance currently available on the issue of vapor intrusion. |
| Vapor Intrusion Issues at Brownfields Sites |
| This background document, prepared by the ITRC, is designed to help stakeholders involved with redevelopment projects to develop a consistent approach to vapor intrusion evaluation, regulatory approval, and deployment of specific technologies at specific sites. The document provides an overview of vapor intrusion, the type of contaminants that may have vapor intrusion potential, the possibility of brownfields sites to have indoor air exposure from vapor intrusion, and the steps that can be taken to limit such exposure. The document provides an international perspective on the problem by including information about vapor intrusion problems and case studies of affected sites in Germany. |
B. Site-Specific Resources for Cleanup Design and Implementation
Listed below are case studies and other resources that provide information
and lessons learned from the application of innovative technologies to
specific contaminants and site types.
| Naval Air Station Pensacola, Optimization of RAO to Treat Chlorinated Hydrocarbons in Groundwater |
| This summary report, which was prepared by NFESC, describes LTM cost reductions associated with reducing sampling frequency and the number of constituents being analyzed for. The U.S. Navy, in conjunction with regulators, optimized remedial action operation (RAO) at a former sludge drying bed and surge pond site at Naval Air Station (NAS) Pensacola in Florida. The RAO resulted in improvements in the monitoring program, a modification to the remedial strategy, accelerated site cleanup, and significant cost savings. |
| Naval Submarine Base, Kings Bay (In Situ Chemical Oxidation) |
| During the early 1990s, a plume of chlorinated solvents was discovered in groundwater moving toward a residential area located near Site 11, Old Camden County Landfill, Naval Submarine Base (NSB), Kings Bay, Georgia. To prevent further off-site contamination, a P&T system was designed and installed to hydraulically contain the plume at the perimeter of the landfill and adjacent to the residential area. An RAO modification reduced long-term P&T for hydraulic containment to a period of less than 2 months after chemical oxidation treatments. Additionally, this modification resulted in savings of more than several million dollars over the life of the remedy. NFESC compiled the summary report to describe system optimization, such as implementing in situ chemical oxidation in addition to P&T in order to reduce contaminant concentrations in source areas. MNA was implemented to address residual concentrations. |
Pilot Project to Optimize Superfund-Financed Pump and Treat Systems: Summary Report and Lessons Learned EPA 542-R-02-008 a-u |
| This report, which was compiled by EPA, summarizes Phase II (site optimization) of the Nationwide Fund-lead Pump and Treat Optimization Project. This phase included conducting RSEs at the 20 sites selected in Phase I with the purpose of providing recommendations to improve remedy effectiveness, reduce remedy costs, improve technical operations, and gain site close-out. RSEs at 4 of the 20 P&T systems (two in Region 4 and two in Region 5) were previously conducted as part of a demonstration project completed in 2000. The RSE process was developed by USACE. |
| Pump and Treat and Air Sparging of Contaminated Groundwater at the Gold Coast Superfund Site, Miami, Florida, September 1998 |
| Gold Coast Oil Corporation operated as a spent oil and solvent recovery facility from 1970 to 1982 near Miami, Florida, and discharged chlorinated solvents directly onto the soil. DNAPL was also observed in groundwater at this site. The case study report prepared by EPA describes modifications to the P&T extraction system, including enlarging two extraction wells, shutting down the system for 4 months, conducting air sparging in source areas, and adding peroxide to wells for a certain period of time. The report describes the results and cost of implementing these modifications at the site. Cleanup standards were met at this site within approximately 4 years after the system modifications. |
| The French Limited site was used as a disposal site for industrial waste material that included chlorinated solvents and organic contaminants such as benzene and chloroform. Active remediation was conducted at the site from January 1992 through December 1995 using groundwater extraction and above-ground treatment; enhanced aquifer flushing through pressure injection of clean water; and accelerated ISB through the addition of oxygen, phosphorus, and nitrate. Source control was achieved through installation of sheet-pile walls around lagoon and DNAPL source areas. The case study report prepared by EPA describes modifications to the treatment system, including adding a second sheet-pile wall around DNAPL. The report also describes the results and cost of implementing these modifications at the site. |
| Pump and Treat and In Situ Bioremediation of Contaminated Groundwater at the Libby Groundwater Superfund Site, Libby, Montana, September 1998 |
| The Libby site is a former wood-treating facility where widespread creosote and PCP contamination was observed. The remedial strategy at this site was to address the source area by removing the NAPL and to stimulate bioremediation in the downgradient upper-aquifer plume. The three components of the aquifer remedial system included a source area extraction system, an intermediate injection system, and a boundary injection system. The case study report prepared by EPA describes modifications to the extraction and treatment system, including converting to low-shear pumps, abandoning four extraction wells and constructing a new one, and replacing a peroxide aeration system for ISB of source water with a bubbleless system. The report also describes the results and cost of implementing these modifications at the site. |
| Pump and Treat and Permeable Reactive Barrier to Treat Contaminated Groundwater at the Former Intersil, Inc. Site, Sunnyvale, California, September 1998 |
| The Former Intersil, Inc., site housed a semiconductor manufacturer that caused groundwater in the area to be contaminated with chlorinated solvents. A P&T system was operated at this site from 1987 until 1995. After the mass removal by the P&T system had asymptotically declined, a PRB was selected as an alternative technology. The case study report prepared by EPA describes modifications to the P&T system, including upgrading the system and switching to a PRB in 1995. The report also describes the results and cost of implementing these two technologies at the site. |
| Pump and Treat of Contaminated Groundwater at the Mid-South Wood Products Superfund Site, Mena, Arkansas, September 1998 |
| The Mid-South Wood Products site was contaminated with PCP, PAHs, and heavy metals. DNAPL and LNAPL were observed in groundwater at the site. The case study report developed by EPA describes modifications to the site extraction and treatment system, including removing five extraction wells, continuously adjusting the pumping schedule for the extraction wells, and adding a carbon treatment system for 1 year. The system optimization was performed after 8 years of systems operation, and groundwater contamination was reduced to one localized area of concern. The report also describes the results and cost of implementing P&T at the site. |
| Pump and Treat of Contaminated Groundwater at the SCRDI Dixiana Superfund Site, Cayce, South Carolina, September 1998 |
| The SCRDI Dixiana site, a former industrial waste storage facility contaminated with chlorinated solvents, provided a cleanup challenge because of its complex hydrogeology. The case study report compiled by EPA describes modifications to the site extraction and treatment system, including adding a collection trench, reducing the number of extraction wells by five, and replacing the tower air-stripper with a shallow air stripper. The report also describes the results and cost of implementing P&T at the site. |
| Pump and Treat of Contaminated Groundwater at the Solid State Circuits Superfund Site, Republic, Missouri, September 1998 |
| The Solid State Circuits site is a former manufacturing facility contaminated with chlorinated solvents. The groundwater, which was characterized as a leaky artesian system occurring in karst formations with shallow and deep bedrock zones, posed a cleanup challenge. A P&T system was operated at the site for several years, but cleanup goals were not achieved. Hence, the system had to be modified in order to enhance its performance. The case study report prepared by EPA describes modifications to the extraction and treatment system, including adding three extraction wells off site to contain the plume and electronically linking the air stripper blower to transfer pumps so that the blower would shut off when the pumps were not operating. The report also describes the results and cost of implementing P&T at the site. |
| Pump and Treat of Contaminated Groundwater at the United Chrome Superfund Site, Corvallis, Oregon, September 1998 |
| The United Chrome Superfund site is a former industrial hard chrome plating facility where chromium contamination was widespread. The case study report prepared by EPA describes modifications to the site extraction and treatment system, including turning off some extraction wells, flushing some areas, sending untreated water to a Publicly Owned Treatment Works (POTW), and injecting deep aquifer water into the upper aquifer. The report also describes the results and cost of implementing P&T at the site. |
| Pump and Treat of Contaminated Groundwater at the Western Processing Superfund Site, Kent, Washington, September 1998 |
| The Western Processing site was operated as a waste processing facility from 1961 to 1983. Over 400 businesses transported industrial wastes to the site to be stored, reclaimed, or buried. The original approach to groundwater treatment at this site was an aggressive effort to fully restore the site to its original condition within 7 years. Restoration was a priority, and high costs were incurred to achieve this goal, including high P&T system operating costs. After 8 years of P&T, the goal of restoration was changed to containment based on the technical impracticability of achieving full restoration. This case study report prepared by EPA describes modifications to extraction and treatment system, including discontinuing operation of 210 shallow well points, installing deep wells, and adding metal precipitation to the treatment system. The report also describes the results and cost of implementing P&T at the site. |
| Remedial Action Operation Optimization Case Study: Eastern Groundwater Plume, New Brunswick, Maine |
| This case study report, which was prepared by NFESC, includes an effectiveness evaluation for the Eastern Groundwater Plume P&T system at NAS Brunswick in Maine. The primary purpose of the evaluation is to assess the ongoing RAO program for this system and to provide recommendations for attainment of site remedial action objectives and site closure. |
Technical Protocol for Evaluating Natural Attenuation of Chlorinated Solvents in Ground Water EPA 600-R-98-128 |
| The report provides guidance for environmental managers about the steps that must be taken to understand the rate and extent to which natural processes are reducing contaminant concentrations at sites that are contaminated by chlorinated solvents. Data collected with this protocol can be used to evaluate natural attenuation through biological processes as part of a protective overall site remedy. The protocol is the result of a collaborative field and laboratory research effort involving researchers from EPA ORD, the U.S. Air Force, and the U.S. Geological Survey. |
| Where Do We Go from Here? |
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