ASTM_D_4050_-_14.pdf

Designation:D405014Standard 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 or D4106 toevaluate 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 or D4106and D4043.1.5 The values stated in SI units are to be regarded asstandard.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 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 limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D653 Terminology Relating to Soil,Rock,and ContainedFluidsD2488 Practice for Description and Identification of Soils(Visual-Manual Procedure)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 Test Method for(Field Procedure)for InstantaneousChange in Head(Slug)Tests for Determining HydraulicProperties of AquifersD4105 Test Method for(Analytical Procedure)for Deter-mining Transmissivity and Storage Coefficient of Non-leaky Confined Aquifers by the Modified Theis Nonequi-librium MethodD4106 Test Method for(Analytical Procedure)for Deter-mining Transmissivity and Storage Coefficient of Non-leaky Confined Aquifers by the Theis NonequilibriumMethodD6026 Practice for Using Significant Digits in GeotechnicalData3.Terminology3.1 DefinitionsFor definitions of common technical termsin this test method,refer to Terminology D653.4.Summary of Test Method4.1 This test method describes the field practices in con-ducting aquifer performance tests by either withdrawal orinjection through a well point.These methods involve chang-ing the control well water level by either the withdrawal of1This 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 June 1,2014.Published July 2014.Originally approvedin 1991.Last previous edition approved in 2008 as D4050 96(2008).DOI:10.1520/D4050-14.2For 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 States1 water from or injection of water to an aquifer and measurementof the water-level response in the aquifer.The analysis of thedata from this field practice is described in standards such asTest Methods D4105 and D4106.NOTE1The injection of water into an aquifer may be regulated orrequire regulatory approvals.Withdrawal of contaminated waters mayrequire that the removed water be properly treated prior to discharge.5.Significance and Use5.1 Withdrawal or injection well test field procedures areused with appropriate analytical procedures i