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This practice covers the method for purging and sampling wells and devices used for ground-water quality investigations and monitoring programs known as low-flow purging and sampling. This method is also known by the terms minimal drawdown purging or low-stress purging. This method could be used for other types of ground-water sampling programs but these uses are not specifically addressed in this practice.
Formerly under the jurisdiction of Committee D18 on Soil and Rock, this practice was withdrawn in 2011 in accordance with section 10.5.3.1 of the Regulations Governing ASTM Technical Committees, which requires that standards shall be updated by the end of the eighth year since the last approval date.
1.1 This practice covers the method for purging and sampling wells and devices used for ground-water quality investigations and monitoring programs known as low-flow purging and sampling. This method is also known by the terms minimal drawdown purging or low-stress purging. This method could be used for other types of ground-water sampling programs but these uses are not specifically addressed in this practice.
1.2 This practice applies only to wells sampled at the wellhead.
1.3 This practice does not address sampling of wells containing either light or dense non-aqueous-phase liquids (LNAPLs or DNAPLs).
1.4 This 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. Not 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 means that the document has been approved through the ASTM consensus process.
1.5 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 and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D4750 Test Method for Determining Subsurface Liquid Levels in a Borehole or Monitoring Well (Observation Well)
D5088 Practice for Decontamination of Field Equipment Used at Non-Radioactive Waste Sites
D5092 Practice for Design and Installation of Ground-Water Monitoring Wells in Aquifers
D5521 Guide for Development of Ground-Water Monitoring Wells in Granular Aquifers
D5903 Guide for Planning and Preparing for a Ground-Water Sampling Event
D6026 Practice for Using Significant Digits in Geotechnical Data
D6089 Guide for Documenting a Ground-Water Sampling Event
D6452 Guide for Purging Methods for Wells Used for Ground-Water Quality Investigations
D6517 Guide for Field Preservation of Ground-Water Samples
D6564 Guide for Field Filtration of Ground-Water Samples
D6634 Guide for the Selection of Purging and Sampling Devices for Ground-Water Monitoring Wells