ASTM_D_5978_-_D_5978M_-_16.pdf

Designation:D5978/D5978M16Standard Guide forMaintenance and Rehabilitation of Groundwater MonitoringWells1This standard is issued under the fixed designation D5978/D5978M;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.INTRODUCTIONThis guide for maintenance and rehabilitation promotes procedures appropriate to groundwatermonitoring wells installed to evaluate the extent and nature of contamination,progress of remediation,and for long-term monitoring of either water quality or water level.1.Scope*1.1 This guide covers an approach to selecting and imple-menting a well maintenance and rehabilitation program forgroundwater monitoring wells.It provides information onsymptoms of problems or deficiencies that indicate the need formaintenance and rehabilitation.It is limited to monitoringwells,that are designed and operated to provide access to,representative water samples from,and information about thehydraulic properties of the saturated subsurface while minimiz-ing impact on the monitored zone.Some methods describedherein may apply to other types of wells although the range ofmaintenance and rehabilitation treatment methods suitable formonitoring wells is more restricted than for other types ofwells.Monitoring wells include their associated pumps andsurface equipment.1.2 This guide is affected by governmental regulations andby site specific geological,hydrogeological,geochemical,climatological,and biological conditions.1.3 UnitsThe values stated in either inch-pound units orSI units presented in brackets are to be regarded separately asstandard.The values stated in each system may not be exactequivalents;therefore,each system shall be used independentlyof the other.Combining values from the two systems mayresult in non-conformance with the standard.1.4 All observed and calculated values shall conform to theguidelines for significant digits and rounding established inPractice D 6026,unless superseded by this standard.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of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.1.6 This guide offers an organized collection of informationor a series of options and does not recommend a specificcourse of action.This document cannot replace education orexperience and should be used in conjunction with professionaljudgment.Not all aspects of this guide may be applicable in allcircumstances.This ASTM standard is not intended to repre-sent or replace the standard of care by which the adequacy ofa 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.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 ConstructionD4044 Test Method for(Field Procedure)for InstantaneousChange in Head(Slug)Tests for Determining HydraulicProperties of AquifersD4412 Test Methods for Sulfate-Reducing Bacteria in Waterand Water-Formed DepositsD4448 Guide for Sampling Ground-Water Monitoring WellsD4750 Test Method for Determining Subsurface LiquidLevels in a Borehole or Monitoring Well(Observation1This 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 1996.Last previous edition approved in 2011 as D5978 96(2011)1.DOI:10.1520/D5978_D5978M-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.*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 Well)(Withdrawn 2010)3D5088 Practice for Decontamination of Field EquipmentUsed at Waste SitesD5092 Practice for Design and Installation of GroundwaterMonitoring WellsD5254 Practice for Minimum Set of Data Elements toIdentify a Ground-Water SiteD5299 Guide for Decommissioning of Groundwater Wells,Vadose Zone Monitoring Devices,Boreholes,and OtherDevices for Environmental ActivitiesD5408 Guide for Set of Data Elements to Describe aGroundwater Site;Part OneAdditional Identi