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The purpose of TechDirect is to identify new technical, policy and
guidance resources related to the assessment and remediation of
contaminated soil and ground water.
Mention of non-EPA documents or presentations does not
constitute a U.S. EPA endorsement of their contents, only an
acknowledgment that they exist and may be relevant to the
Upcoming Internet Seminars
ITRC Radiation Risk Assessment: Updates and Tools, May 4.
This training clarifies the variations between the dose approach
used at some sites and EPA's risk-based approach. It also
elaborates on the methodology used to develop risk-based
remediation goals. For more information and to register, see or
http://clu-in.org/studio or http://www.itrcweb.org .
ITRC Alternative Landfill Covers - Design, Installation, and
Monitoring of Alternative Final Landfill Covers, May 13. This
training focuses on evapotranspiration (ET) covers and the
decisions associated with their successful design, construction, and
long-term care. For more information and to register, see or
http://clu-in.org/studio or http://www.itrcweb.org .
NIEHS Biosensor Research - Part Two, May 18. This is the
second of two seminars on Biosensors for Environmental
Monitoring. Dr. Patrick Larkin of EcoArray, Inc. will describe
their work to develop gene chips and related products for several
key wildlife models of interest to government agencies. In
addition, Dr. Elwood Linney of Duke University will present his
work on the zebrafish model and place it within the context of
mammalian models that are used to investigate the effects of
environmental toxicants. To register, see http://clu-in.org/studio .
ITRC Systematic Approach to In Situ Bioremediation:
Nitrates, Carbon Tetrachloride, and Perchlorate, May 20. This
training presents a decision tree for reviewing, planning,
evaluating, and approving in situ bioremediation (ISB) systems in
the saturated subsurface. It defines site parameters and appropriate
ranges of criteria necessary for characterization, testing, design,
and monitoring of ISB technologies. For more information and to
register, see or http://clu-in.org/studio or http://www.itrcweb.org .
Guidance for Monitoring at Hazardous Waste Sites:
Framework for Monitoring Plan Development and
Implementation (OSWER Directive 9355.4-28). This U.S. EPA
guidance document presents a framework for developing and
implementing technically defensible Monitoring Plans for
hazardous waste sites in support of the One Cleanup Program. It
was written for site managers who are legally responsible for
managing removal and remedial site activities. The document is
intended for use at hazardous waste sites that have completed site
characterization, risk assessment, and remedy selection and are in
the process of implementing a removal action or site mitigation
(January 2004, 64 pages). View or download at
CLU-IN Contaminant Focus Update. EPA understands that site
owners and other parties involved in remedial activities need
information in a variety of formats. Cleanup information may, for
example, be organized according to site types, technologies, or
environmental media. The CLU-IN Contaminant Focus area
bundles information associated with the cleanup of individual
contaminants and contaminant groups. This information is
presented in categories such as Policy and Guidance, Chemistry
and Behavior, Environmental Occurrence, Toxicology, Detection
and Site Characterization, Treatment Technologies, and
Conferences and Seminars. We have recently added two new
contaminant areas to the site: PCBs and MTBE. For more
information, see http://clu-in.org/contaminantfocus/ .
ESTCP Cost and Performance Report: Natural Pressure-
Driven Passive Bioventing (CU-9715). This report was produced
by the DoD Environmental Security Technology Certification
Program (ESTCP). It provides information needed for comparing
passive bioventing to conventional bioventing on the basis of
performance, installation and operating costs, and implementation
issues. The primary demonstration objective was to identify a site
where passive bioventing would be successful. The secondary
objective was to measure the rate of airflow and radius of oxygen
influence as the result of operating a pilot-scale passive bioventing
system that consisted of one vent well with a one-way passive
valve and soil-gas monitoring points (January 2004, 43 pages).
View or download at
http://www.estcp.org/documents/techdoc ... .
ESTCP Cost and Performance Report: Applied Innovative
Technologies for Characterization of Explosives-Contaminated
DoD Building Foundations and Underlying Soils (CU-0130).
The DoD Environmental Security Technology Certification
Program (ESTCP) evaluated a variety of methods for
characterizing the foundations, adjacent areas, and underlying soils
without having to remove the buildings and foundations first. As
part of this demonstration, field test methods including Raman
spectroscopy, Expray colorimetric indicator, and the Cold Regions
Research and Engineering Laboratory (CRREL) Royal Demolition
Explosive (RDX) colorimetric field screening method were
evaluated at five buildings to determine the presence and/or
concentration of nitrocellulose or nitroglycerine in soil samples and
concrete slabs. Raman spectroscopy was also evaluated for
identifying the presence of other organic compounds used in the
manufacturing processes (February 2004, 49 pages). View or
download at http://www.estcp.org/documents/techdocs/ ... .
Enhanced Access Penetration System (EAPS). The Department
of Energy funded the development of a direct push (DP) system
able to drill through refusal points. This report describes an
evaluation study of the Enhanced Access Penetration System
(EAPS) which extends cone penetrometer penetration depth.
EAPS consists of four major components: (1) a Wireline CPT/Gas
sampling probe and wireline soil and groundwater sampling
system, (2) a small diameter air rotary drilling system, (3)
environmental sensors that are used to detect and characterize
contamination in both real and near-real time, and (4) an integral
drill spoils collection and filtration system. (January 2004, 66
pages). View or download at http://clu-in.org/techpubs.htm .
CalEPA Evaluation Report: Hapsite GCMS. California EPA's
Department of Toxic Substances Control (DTSC) has certified the
analytical capabilities of the HAPSITE portable gas
chromatograph-mass spectrometer (GC-MS) system as a
field-based analytical method as well as a laboratory instrument for
measuring volatile organic compounds (VOCs) in water, soil and
soil gas. This 2004 certification report evaluates the performance
of the HAPSITE instrument based on a detailed review of data
packages submitted by the technology proponent, field data
generated by independent parties, and of new data collected under
the oversight of the California Environmental Technology
Certification Program (March 2004, 75 pages). View or download
at http://clu-in.org/techpubs.htm .
Conferences and Symposia
MTBE & TBA - Comprehensive Site Assessment and
Successful Groundwater Remediation, Mansfield, NJ, May 10-
11. The Interstate Te