ASTM D7648-12

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Designation: D7648 − 12
Standard Practice for
Active Soil Gas Sampling for Direct Push or Manual-Driven
1
Hand-Sampling Equipment
This standard is issued under the fixed designation D7648; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope gent sampling methods and protocol are necessary for precise
samples and data collection.
1.1 This practice details the collection of active soil gas
samples using a variety of sample collection techniques with 1.5 Details included in this practice include a broad spec-
tooling associated with direct push drilling technology (DPT) trum of practices and applications of soil gas surveys, includ-
or manual-driven hand-sampling equipment, for the express ing:
purpose of conducting soil gas surveys. 1.5.1 Sample recovery and handling,
1.5.2 Sample analysis,
1.2 This practice proceeds on the premise that soil gas
1.5.3 Data interpretation, and
surveys are primarily used for two (2) purposes, 1) as a
1.5.4 Data reporting.
preliminary site investigative tool and 2) for the monitoring of
ongoing remediation activities.
1.6 This practice suggests a variety of approaches useful to
conducting successful soil gas surveys but cannot replace
1.3 The practicality of field use demands that soil gas
educationorexperienceandshouldbeusedinconjunctionwith
surveys are relatively accurate, as well as being simple, quick,
professional judgment. Not all aspects of this practice may be
and inexpensive. This guide suggests that the objective of soil
applicable in all circumstances. This ASTM standard is not
gas surveys is linked to three factors:
intended to represent or replace the standard of care by which
1.3.1 VOC detection and quantitation, including determina-
the adequacy of a given professional service must be judged,
tion of depth of VOC contamination.
nor should this document be applied without consideration of
1.3.2 Sample retrieval ease and time.
a project’s many unique aspects.
1.3.3 Cost.
1.7 This practice offers an organized collection of informa-
1.4 This practice will likely increase the awareness of a
tion or a series of options and does not recommend a specific
fundamental difference between soil gas sampling for the
course of action. The success of any one soil gas survey
purpose of soil gas surveys versus sub-slab or vapor intrusion
methodology is strongly dependent upon the environment in
investigations or both. Specifically, the purpose of a soil gas
which it is applied.
survey is to provide quick and inexpensive data to the
investigator that will allow the investigator to 1) develop a site 1.8 This practice is not to be used for long term monitoring
investigation plan that is strategic in its efforts, 2) determine
of contaminated sites or for site closure conformation.
success or progress of on-going remedial activities, or 3) select
1.9 This practice is not to be used for passive determination
the most suitable subsequent investigation equipment, or com-
of flow patterns at contaminated sites.
binations thereof. On the other hand, the objective of soil gas
1.10 This practice does not purport to address all of the
sampling for sub-slab and vapor intrusion investigations (1, 2,
2
safety concerns, if any, associated with its use. It is the
3, etc.) is not preliminary, but rather the end result of the site
responsibility of the user of this practice to establish appro-
investigation or long-term precise monitoring. As such, strin-
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
1.11 This practice does not purport to set standard levels of
1
This practice is under the jurisdiction of ASTM Committee D18 on Soil and
acceptable risk. Use of this practice for purposes of risk
Rock and is the direct responsibility of Subcommittee D18.21 on Groundwater and
assessment is wholly the responsibility of the user.
Vadose Zone Investigations.
Current edition approved March 1, 2012. Published April 2012. DOI: 10.1520/
1.12 Concerns of practitioner liability or protection from or
D7648-12.
2 release from such liability, or both, are not addressed by this
The boldface numbers in parentheses refer to a list of references at the end of
practice.
this standard.
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D7648 − 12
2. Referenced Documents 3.1.7 hot spot, n—areas where contaminants exceed cleanup
3 standards or the highest level at a contaminated site.
2.1 ASTM Standards:
D653 Terminology Relating
...