ASTM D5299-99
(Guide)Standard Guide for Decommissioning of Ground Water Wells, Vadose Zone Monitoring Devices, Boreholes, and Other Devices for Environmental Activities
Standard Guide for Decommissioning of Ground Water Wells, Vadose Zone Monitoring Devices, Boreholes, and Other Devices for Environmental Activities
SCOPE
1.1 This guide covers procedures that are specifically related to permanent decommissioning (closure) of the following as applied to environmental activities. It is intended for use where solid or hazardous materials or wastes are found, or where conditions occur requiring the need for decommissioning. The following devices are considered in this guide:
1.1.1 A borehole used for geoenvironmental purposes (see Note 1),
1.1.2 Monitoring wells,
1.1.3 Observation wells,
1.1.4 Injection wells (see Note 2),
1.1.5 Piezometers,
1.1.6 Wells used for the extraction of contaminated ground water, the removal of floating or submerged materials other than water such as gasoline or tetrachloroethylene, or other devices used for the extraction of soil gas,
1.1.7 A borehole used to construct a monitoring well, and
1.1.8 Any other vadose zone monitoring device.
1.2 Temporary decommissioning of the above is not covered in this guide. Note 1-This guide may be used to decommission boreholes where no contamination is observed at a site (see Practice D420 for details); however, the primary use of the guide is to decommission boreholes and wells where solid or hazardous waste have been identified. Methods identified in this guide can also be used in other situations such as the decommissioning of water supply wells and boreholes where water contaminated with nonhazardous pollutants (such as nitrates or sulfates) are present. This guide should be consulted in the event that a routine geotechnical investigation indicates the presence of contamination at a site. Note 2-The term "well" is used in this guide to denote monitoring wells, piezometers, or other devices constructed in a manner similar to a well. Some of the devices listed such as injection and extraction wells can be decommissioned using this guide for information, but are not specifically covered in the text. Note 3-Details on the decommissioning of multiple-screened wells are not provided in this guide due to the many methods used to construct these types of wells and the numerous types of commercially available multiple-screened well systems. However, in some instances, the methods presented in this guide may be used with few changes. An example of how this guide may be used is the complete removal of the multiple-screened wells by overdrilling.
1.3 Most monitoring wells and piezometers are intended primarily for water quality sampling, water level observation, or soil gas sampling, or combination thereof, to determine quality. Many wells are relatively small in diameter (
1.3.1 Eliminate the possibility that the well is used for purposes other than intended,
1.3.2 Prevent migration of contaminants into an aquifer or between aquifers,
1.3.3 Prevent migration of contaminants in the vadose zone,
1.3.4 Reduce the potential for vertical or horizontal migration of fluids in the well or adjacent to the well, and
1.3.5 Remove the well from active use when the well is no longer capable of rehabilitation, or has failed structurally; no longer required for monitoring; no longer capable of providing representative samples or is providing unreliable samples; or required to be decommissioned; or to meet regulatory requirements. Note 4-The determination of whether a well is providing a representative water quality sample is not defined in this guide. Examples of when a representative water quality sample may not be collected include the biological or chemical clogging of well screens, a drop in water level to below the base of the well screen, or complete silting of a tail pipe. These conditions may indicate that a well is not functioning properly.
1.4 This guide is intended to provide information for effective permanent closure of wells so that the physical structure of the well does not provide a means of hydraulic communication between aquifers or react chemically in a detrimental way with the environment.
1.5 The intent of this guide is to provide ...
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D5299–99
Standard Guide for
Decommissioning of Ground Water Wells, Vadose Zone
Monitoring Devices, Boreholes, and Other Devices for
1
Environmental Activities
This standard is issued under the fixed designation D5299; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
NOTE 3—Details on the decommissioning of multiple-screened wells
1. Scope
are not provided in this guide due to the many methods used to construct
1.1 This guide covers procedures that are specifically re-
these types of wells and the numerous types of commercially available
latedtopermanentdecommissioning(closure)ofthefollowing
multiple-screenedwellsystems.However,insomeinstances,themethods
as applied to environmental activities. It is intended for use
presentedinthisguidemaybeusedwithfewchanges.Anexampleofhow
where solid or hazardous materials or wastes are found, or this guide may be used is the complete removal of the multiple-screened
wells by overdrilling.
where conditions occur requiring the need for decommission-
ing. The following devices are considered in this guide:
1.3 Most monitoring wells and piezometers are intended
1.1.1 A borehole used for geoenvironmental purposes (see
primarily for water quality sampling, water level observation,
Note 1),
or soil gas sampling, or combination thereof, to determine
1.1.2 Monitoring wells,
quality. Many wells are relatively small in diameter and are
1.1.3 Observation wells,
used to monitor for hazardous chemicals in ground water.
1.1.4 Injection wells (see Note 2),
Decommissioning of monitoring wells is necessary to:
1.1.5 Piezometers,
1.3.1 Eliminate the possibility that the well is used for
1.1.6 Wells used for the extraction of contaminated ground
purposes other than intended,
water, the removal of floating or submerged materials other
1.3.2 Prevent migration of contaminants into an aquifer or
than water such as gasoline or tetrachloroethylene, or other
between aquifers,
devices used for the extraction of soil gas,
1.3.3 Preventmigrationofcontaminantsinthevadosezone,
1.1.7 A borehole used to construct a monitoring well, and
1.3.4 Reduce the potential for vertical or horizontal migra-
1.1.8 Any other vadose zone monitoring device.
tion of fluids in the well or adjacent to the well, and
1.2 Temporary decommissioning of the above is not cov-
1.3.5 Remove the well from active use when the well is no
ered in this guide.
longer capable of rehabilitation, or has failed structurally; no
longer required for monitoring; no longer capable of providing
NOTE 1—Thisguidemaybeusedtodecommissionboreholeswhereno
representative samples or is providing unreliable samples; or
contamination is observed at a site (see Practice D420 for details);
however, the primary use of the guide is to decommission boreholes and required to be decommissioned; or to meet regulatory require-
wells where solid or hazardous waste have been identified. Methods
ments.
identified in this guide can also be used in other situations such as the
NOTE 4—The determination of whether a well is providing a represen-
decommissioning of water supply wells and boreholes where water
tativewaterqualitysampleisnotdefinedinthisguide.Examplesofwhen
contaminated with nonhazardous pollutants (such as nitrates or sulfates)
a representative water quality sample may not be collected include the
are present. This guide should be consulted in the event that a routine
biological or chemical clogging of well screens, a drop in water level to
geotechnical investigation indicates the presence of contamination at a
below the base of the well screen, or complete silting of a tail pipe.These
site.
conditions may indicate that a well is not functioning properly.
NOTE 2—The term “well” is used in this guide to denote monitoring
wells, piezometers, or other devices constructed in a manner similar to a
1.4 This guide is intended to provide information for effec-
well.Someofthedeviceslistedsuchasinjectionandextractionwellscan
tivepermanentclosureofwellssothatthephysicalstructureof
be decommissioned using this guide for information, but are not specifi-
thewelldoesnotprovideameansofhydrauliccommunication
cally covered in the text.
betweenaquifersorreactchemicallyinadetrimentalwaywith
the environment.
1
This guide is under the jurisdiction of ASTM Committee D-18 on Soil and 1.5 The intent of this guide is to provide procedures that
RockandisthedirectresponsibilityofSubcommitteeD18.21onGroundWaterand
when followed result in a reasonable level of confidence in the
Vadose Zone Investigations.
integrity of the decommissioning activity. However, it may not
Current edi
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.