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United States EPA 510-F-97-004
Environmental Protection April 1997
Agency
Solid Waste And Emergency Response (5403G)"
Introducing.,
Assessment Tools
For Underground
Storage Tank
**
A Guide For
Regulators
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Purpose
The U.S. Environmental Protection
Agency (EPA) has developed a guide
to help underground storage tank regu-
lators evaluate and promote expedited
site,assessments at underground storage
tank (UST) sites. Expedited Site
Assessment Tools For Underground
Storage Tank Sites: A Guide For
Regulators (510-&-97-001) is designed
to enable the reader to answer the fol-
lowing basic questions about expedited
site assessments at UST facilities:
• What is an expedited site
assessment?
• How is an expedited site
assessment conducted?
• What equipment can be used in an
expedited site assessment?
• Under what site conditions are
specific site assessment tools
appropriate?
Background
EPA's Office of Underground Storage
Tanks estimates that at least 360,000
sites are likely to require site assess-
ments in the next few years. The
majority of these assessments will
result from owners' and operators'
closing or replacing old tanks to com-
ply with the December 22, 1998 regu-
latory deadline. Additional assess-
ments will be required to investigate
backlogged sites and new releases.
There have been many improvements
in site assessment technologies over
the last few years. When they are
systematically integrated into the site
assessment process, these new tech-
nologies can speed up the on-site
decision-making process.
As the first step in the corrective
action process, site assessments are
critical to making appropriate remedi-
ation decisions. Using expedited site
assessments can streamline the cor-
rective action process, improve data
collection, and reduce the overall cost
of remediation.
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Audience
Federal, state, and local regulators who
review corrective action plans and site
assessment reports are the primary audi-
ence for the Guide. The Guide will also
be useful to consultants, engineers,
lenders, public health professionals,
environmental education centers, and
others involved in the cleanup or remedi-
ation of leakmg underground storage
tank sites.
Contents
This Guide is organized into six
chapters.
I. Introduction provides an overview
of the entire manual.
II. The Expedited Site Assessment
Process presents the steps involved in
an expedited site assessment.
IE. Surface Geophysical Methods
describes; and compares the most
appropriate, cost effective surface geo-
physical methods for UST site assess-
ments.
IV. Soil Gas Surveys describes active
. and passive soil gas survey methodolo-
gies and explains their applicability at
UST sites.
V. Direct Push Technologies describes
'- the applicability of the components and
tools used with direct push technolo-
gies." •.'•'•"', '-'.
VI. Field Methods For The Analysis Of
Petroleum Hydrocarbons describes the
eight most appropriate methods for
analyzing petroleum hydrocarbons on-
site and provides the reader with an
easy-to-understand means of determin-
ing the applicability of each method.
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United States Government INFORMATION
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