ASTM_D_4050_-_20.pdf

Designation:D405020Standard Test Method for(Field Procedure)for Withdrawal and Injection Well Testingfor Determining Hydraulic Properties of Aquifer Systems1This standard is issued under the fixed designation D4050;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This test method covers the field procedure for selectingwell locations,controlling change(discharge or injection)rates,and measuring water levels used to analyze the hydraulicproperties of an aquifer or aquifers and adjacent confiningbeds.1.2 This test method is used in conjunction with an analyti-cal procedure such as Test Methods D4105/D4105M or D4106to evaluate the data and determine aquifer properties.1.3 The appropriate field and analytical procedures areselected as described in Guide D4043.1.4 LimitationsThe limitations of this test method areprimarily related to the correspondence between the fieldsituation determined by this test method and the simplifyingassumptions of the analytical Test Methods D4105/D4105M orD4106 and D4043.1.5 UnitsThe values stated in SI units are to be regardedas standard.Reporting of test results in units other than SI shallnot be regarded as nonconformance with this standard.1.6 All observed and calculated values shall conform to theguidelines for significant digits and rounding established inPractice D6026.1.6.1 The procedures used to specify how data are collected/recorded or calculated,in this standard are regarded as theindustry standard.In addition,they are representative of thesignificant digits that generally should be retained.The proce-dures used do not consider material variation,purpose forobtaining the data,special purpose studies,or any consider-ations for the users objectives;and it is common practice toincrease or reduce significant digits of reported data to becommensurate with these considerations.It is beyond the scopeof this standard to consider significant digits used in analyticalmethods for engineering design.1.7 This test method offers a set of instructions for perform-ing one or more operations.This document cannot replaceeducation or experience and should be used in conjunction withprofessional judgement.Not all aspects of this standard may beapplicable in all circumstances.This ASTM standard is notintended to represent or replace the standard of care by whichthe adequacy of a given professional service must be judged,nor should this document be applied without consideration ofa projects many unique aspects.The word“Standard”in thetitle of this document means only that the document has beenapproved through the ASTM consensus process.1.8 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.9 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D653 Terminology Relating to Soil,Rock,and ContainedFluidsD2488 Practice for Description and Identification of Soils(Visual-Manual Procedures)D3740 Practice for Minimum Requirements for AgenciesEngaged in Testing and/or Inspection of Soil and Rock asUsed in Engineering Design and ConstructionD4043 Guide for Selection of Aquifer Test Method inDetermining Hydraulic Properties by Well TechniquesD4044/D4044M Test Method for(Field Procedure)for In-stantaneous Change in Head(Slug)Tests for DeterminingHydraulic Properties of Aquifers1This test method is under the jurisdiction ofASTM Committee D18 on Soil andRock and is the direct responsibility of Subcommittee D18.21 on Groundwater andVadose Zone Investigations.Current edition approved Jan.1,2020.Published January 2020.Originallyapproved in 1991.Last previous edition approved in 2014 as D4050 14.DOI:10.1520/D4050-20.2For 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.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guid