ASTM D5521/D5521M-18
Standard Guide for Development of Groundwater Monitoring Wells in Granular Aquifers

Standard No.

ASTM D5521/D5521M-18

Release Date

2018

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM D5521/D5521M-18

Scope

1.1 This guide covers the development of screened wells installed for the purpose of obtaining representative groundwater information and water quality samples from granular aquifers, though the methods described herein could also be applied to wells used for other purposes. Other welldevelopment methods that are used exclusively in openborehole bedrock wells are not described in this guide. 1.2 The applications and limitations of the methods described in this guide are based on the assumption that the primary objective of the monitoring wells to which the methods are applied is to obtain representative water quality samples from aquifers. Screened monitoring wells developed using the methods described in this guide should yield relatively sediment-free samples from granular aquifer materials, ranging from gravels to silty sands. While many monitoring wells are considered “small-diameter” wells (that is, less than 10 cm [4 in.] inside diameter), some of the techniques described in this guide will be more easily applied to largediameter wells (that is, 10 cm [4 in.] or greater inside diameter). 1.3 The values stated in either SI units or inch-pound units 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. 1.4 This 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. 1.5 This guide offers an organized collection of information or a series of options and does not recommend a specific course of action. This document cannot replace education or experience and should be used in conjunction with professional judgment. Not all aspects of this guide 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 needs to 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. 1.6 This 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 D5521/D5521M-18 Referenced Document

• ASTM D3740 Standard Practice for Minimum Requirements for Agencies Engaged in the Testing and/or Inspection of Soil and Rock as Used in Engineering Design and Construction
• ASTM D5088 Standard Practice for Decontamination of Field Equipment Used at Nonradioactive Waste Sites
• ASTM D5092 Standard Practice for Design and Installation of Ground Water Monitoring Wells in Aquifers
• ASTM D653 Standard Terminology Relating to Soil, Rock, and Contained Fluids

ASTM D5521/D5521M-18 history

• 2018 ASTM D5521/D5521M-18 Standard Guide for Development of Groundwater Monitoring Wells in Granular Aquifers
• 2013 ASTM D5521/D5521M-13 Standard Guide for Development of Groundwater Monitoring Wells in Granular Aquifers
• 2005 ASTM D5521-05 Standard Guide for Development of Ground-Water Monitoring Wells in Granular Aquifers
• 1994 ASTM D5521-94e1 Standard Guide for Development of Ground-Water Monitoring Wells in Granular Aquifers (Withdrawn 2003)