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ASTM D 5092/D5092M : 2016 : R2024

Current

Current

The latest, up-to-date edition.

Standard Practice for Design and Installation of Groundwater Monitoring Wells

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

21-06-2024

€80.76
Excluding VAT

Committee
D 18
DocumentType
Standard Practice
Pages
24
PublisherName
American Society for Testing and Materials
Status
Current
Supersedes

1.1This practice describes a methodology for designing and installing conventional (screened and filter-packed) groundwater monitoring wells suitable for formations ranging from unconsolidated aquifers (that is, sands and gravels) to granular materials having grain-size distributions with up to 50 % passing a #200 sieve and as much as 20 % clay-sized material (that is, silty fine sands with some clay). Formations finer than this (that is, silts, clays, silty clays, clayey silts) can be monitored but the well may not yield sufficient water required for sampling, and fine filter pack and screen requirements are difficult and costly to install. Use of coarser filter/screens in fine formations will result in wells with unstable filter packs and associated elevated sample turbidity that may adversely affect sample accuracy and data quality objectives. This practice is not applicable in fractured or karst rock conditions, but may be applicable for other porous rock formations.

1.2The recommended monitoring well design and installation procedures presented in this practice are based on the assumption that the objectives of the program are to obtain representative groundwater samples and other representative groundwater data from a targeted zone of interest in the subsurface defined by site characterization.

1.3This practice when used on coarse grained sand and gravel aquifers, in combination with proper well development (D5521/D5521M), proper groundwater sampling procedures (D4448), and proper well maintenance and rehabilitation (D5978/D5978M), will permit acquisition of groundwater samples free of artifactual turbidity, eliminate siltation of wells between sampling events, and permit acquisition of accurate groundwater levels and hydraulic conductivity test data from the zone screened by the well. For wells installed in fine-grained formation materials, it is generally necessary to use much finer pre-packed well screens (6.3.3.2) and/or employ sampling methods that minimize screen intake flow velocity, and disturbance of the well column including suspension of settled solids in the well. Using low-flow purging and sampling techniques (D6771) or passive sampling devices (D7929) are two means to minimize the potential sample bias associated with turbidity.

1.4This practice applies primarily to well design and installation methods used in drilled boreholes. Other standards, including Guide D6724/D6724M and Practice D6725/D6725M, cover installation of monitoring wells using direct-push methods.

1.5Units—The values stated in either inch-pound units or SI units [presented in brackets] are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. Equivalent values given in parentheses are shown for mix designs and sieves sizes.

1.5.1Sieve Designations (Specification E11) are identified using the “alternate” system, for example, #40, #200 sieve etc. with nominal opening size in inches and particle sizes in mm. See Specification E11 for standard metric sieve sizes.

1.5.2Well screen slots are expressed in inches and the metric equivalent is given in the terminology section and when necessary in the standard (see 3.3.6).

1.6All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice D6026, unless superseded by this standard.

1.7This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.8This practice offers a set of instructions for performing one or more specific operations. This document cannot replace education or experience and should be used in conjunction with professional judgment. Nat all aspects of this practice may be applicable in all circumstances. This ASTM standard is not intended to represent or replace the standard of care by which the adequacy of a given professional service must be judged, nor should this document be applied without consideration of a project's many unique aspects. The word “Standard” in the title of this document means only that the document has been approved through the ASTM consensus process.

1.9This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

ASTM D 6725/D6725M : 2016 : R2024 : EDT 1 Standard Practice for Direct Push Installation of Prepacked Screen Monitoring Wells in Unconsolidated Aquifers
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ASTM D 6574/D6574M : 2013 : R2021 Standard Test Method for Determining the (In-Plane) Hydraulic Transmissivity of a Geosynthetic by Radial Flow
ASTM D 7929 : 2020 Standard Guide for Selection of Passive Techniques for Sampling Groundwater Monitoring Wells
ASTM D 6452 : 2018 : R2023 Standard Guide for Purging Methods for Wells Used for Ground Water Quality Investigations
ASTM D 7663 : 2012 : R2024 Standard Practice for Active Soil Gas Sampling in the Vadose Zone for Vapor Intrusion Evaluations
ASTM D 6067/D6067M : 2017 Standard Practice for Using the Electronic Piezocone Penetrometer Tests for Environmental Site Characterization and Estimation of Hydraulic Conductivity
ASTM D 6286/D6286M : 2020 Standard Guide for Selection of Drilling and Direct Push Methods for Geotechnical and Environmental Subsurface Site Characterization
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ASTM D 420 : 2018 Standard Guide for Site Characterization for Engineering Design and Construction Purposes
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ASTM D 6914/D6914M : 2016 : R2024 Standard Practice for Sonic Drilling for Site Characterization and the Installation of Subsurface Monitoring Devices
ASTM D 5980 : 2016 : R2024 Standard Guide for Selection and Documentation of Existing Wells for Use in Environmental Site Characterization and Monitoring
ASTM D 5876/D5876M : 2017 : R2024 Standard Guide for Use of Direct Rotary Wireline Casing Advancement Drilling Methods for Geoenvironmental Exploration and Installation of Subsurface Water-Quality Monitoring Devices
ASTM D 6724/D6724M : 2016 : R2024 : EDT 1 Standard Guide for Installation of Direct Push Groundwater Monitoring Wells
ASTM D 5978/D5978M : 2016 : R2024 Standard Guide for Maintenance and Rehabilitation of Groundwater Monitoring Wells
ASTM D 5783 : 2018 Standard Guide for Use of Direct Rotary Drilling with Water-Based Drilling Fluid for Geoenvironmental Exploration and the Installation of Subsurface Water-Quality Monitoring Devices
ASTM D 6564/D6564M : 2017 : R2024 Standard Guide for Field Filtration of Groundwater Samples
ASTM F 480 : 2014 : R2022 Standard Specification for Thermoplastic Well Casing Pipe and Couplings Made in Standard Dimension Ratios (SDR), SCH 40 and SCH 80
ASTM D 6771 : 2021 Standard Practice for Low-Flow Purging and Sampling Used for Groundwater Monitoring

ASTM C 150/C150M : 2024 Standard Specification for Portland Cement
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ASTM D 653 : 2024 : REV A Standard Terminology Relating to Soil, Rock, and Contained Fluids
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