ASTM_D_6724_-_D_6724M_-_16.pdf

Designation:D6724/D6724M16Standard Guide forInstallation of Direct Push Groundwater Monitoring Wells1This standard is issued under the fixed designation D6724/D6724M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This guide describes various direct push groundwatermonitoring wells and provides guidance on their selection andinstallation for obtaining representative groundwater samplesand monitoring water table elevations.Direct push wells areused extensively for monitoring groundwater quality in uncon-solidated formations.This guide also includes discussion ofsome groundwater sampling devices which can be permanentlyemplaced as monitoring wells.1.2 This guide does not address the single event sampling ofgroundwater using direct push water samplers as presented inGuide D6001.The methods in this guide are often used withother tests such as direct push soil sampling(Guide D6282)and the cone penetrometer test(Guide D6067).The guide doesnot address the installation of monitoring wells by rotarydrilling or sonic drilling methods such as those presented inPractice D5092.Techniques for obtaining groundwatersamples from monitoring wells are covered in Guides D4448,D7929,and Practice D6771.Practice D6725 addresses directpush wells using pre-packed screens.1.3 The installation of direct push groundwater monitoringwells is limited to unconsolidated soils and sediments includ-ing clays,silts,sands,and some gravels and cobbles.Penetra-tion may be limited,or damage may occur to equipment,incertain subsurface conditions;some of which are discussed in5.5.Information in this guide is limited to groundwatermonitoring in the saturated zone.1.4 The values stated in either inch-pound units or SI unitspresented 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.1.5 All observed and calculated values shall conform to theguidelines for significant digits and rounding established inPractice D6026,unless superseded by this standard.1.6 This guide offers an organized collection of informationor a series of options and does not recommend a specific courseof action.This document cannot replace education or experi-ence and should be used in conjunction with professionaljudgement.Not all aspects of this guide may be applicable inall circumstances.This ASTM standard is not intended torepresent or replace the standard of care by which the adequacyof a given professional service must be judged,nor should thisdocument be applied without consideration of a projects manyunique aspects.The word“Standard”in the title of thisdocument means only that the document has been approvedthrough the ASTM consensus process.1.6.1 This guide does not purport to comprehensively ad-dress all of the methods and issues associated with monitoringwell installation.Users should seek input from qualifiedprofessionals for the selection of proper equipment and meth-ods that would be the most successful for their site conditions.Other methods may be available for monitoring wellinstallation,and qualified professionals should have flexibilityto exercise judgement concerning alternatives not covered inthis guide.The practice described in this guide is current at thetime of issue;however,new,alternative,and innovative meth-ods may become available prior to revisions.Therefore,usersshould consult with manufacturers or producers prior tospecifying program requirements.1.7 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory requirements prior to use.2.Referenced Documents2.1 ASTM Standards:2D653 Terminology Relating to Soil,Rock,and ContainedFluidsD3740 Practice for Minimum Requirements for AgenciesEngaged in Testing and/or Inspection of Soil and Rock asUsed in Engineering Design and ConstructionD4448 Guide for Sampling Ground-Water Monitoring Wells1This guide is under the jurisdiction ofASTM Committee D18 on Soil and Rockand is the direct responsibility of Subcommittee D18.21 on Groundwater andVadose Zone Investigations.Current edition approved July 1,2016.Published July 2016.Originally approvedin 2001.Last previous editon approved in 2010 as D672404(2010).DOI:10.1520/D6724_D6724M-16.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.*