1、Designation:D656400(Reapproved 2012)1Standard Guide forField Filtration of Groundwater Samples1This standard is issued under the fixed designation D6564;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A numb
2、er in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1NOTEEditorial changes were made throughout in May 2012.1.Scope1.1 This guide covers methods for field filtration of ground-water samples collected from g
3、roundwater monitoring wells,excluding samples that contain non-aqueous phase liquids(either Dense Non-Aqueous Phase Liquids(DNAPLs)or LightNon-Aqueous Phase Liquids(LNAPLs).Methods of fieldfiltration described herein could also be applied to samplescollected from wells used for other purposes.Labora
4、toryfiltration methods are not described in this guide.1.2 This guide provides procedures available for field filtra-tion of groundwater samples.The need for sample filtration forspecific analytes should be defined prior to the sampling eventand documented in the site-specific sampling and analysis
5、planin accordance with Guide D5903.The decision should be madeon a parameter-specific basis with consideration of the dataquality objectives of the sampling program,any applicableregulatory agency guidelines,and analytical method require-ments.1.3 This guide offers an organized collection of informa
6、tionor a series of options and does not recommend a specific courseof action.This guide cannot replace education or experienceand should be used in conjunction with professional judgment.Not all aspects of this guide may be applicable in all circum-stances.This guide is not intended to represent or
7、replace thestandard of care by which the adequacy of a given professionalservice must be judged,nor should this guide be appliedwithout consideration of the many unique aspects of a project.The word“Standard”in the title of this guide means only thatthe guide has been approved through the ASTM conse
8、nsusprocess.1.4 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.Refe
9、renced Documents2.1 ASTM Standards:2D653 Terminology Relating to Soil,Rock,and ContainedFluidsD5088 Practice for Decontamination of Field EquipmentUsed at Waste SitesD5092 Practice for Design and Installation of GroundwaterMonitoring WellsD5903 Guide for Planning and Preparing for a GroundwaterSampl
10、ing EventD6089 Guide for Documenting a Groundwater SamplingEventF740 Definitions of Terms Relating to Filtration(Withdrawn2002)33.Terminology3.1 Definitions:For definitions of common technical termsin this standard,refer to Terminology D653.3.2 Definitions of Terms Specific to This Standard:3.2.1 fi
11、lter,vto pass a fluid containing particles through afilter medium whereby particles are separated from the fluid.F7403.2.2 filter,na device for carrying out filtration whichconsists of the combination of the filter medium and suitablehardware for constraining and supporting it in the path of theflui
12、d.F7403.2.3 filter mediumthe permeable material used for a filterthat separates particles from a fluid passing through it.F7403.2.4 filter preconditioningthe process of preparing a filtermedium for filtration3.2.5 filter systemthe combination of one or more filterwith all the associated process hard
13、ware required for filtration.F7401This 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 May 15,2012.Published December 2012.Originallyapproved in 2000.Las
14、t previous edition approved in 2005 as D6564 00(2005).DOI:10.1520/D6564-00R12E01.2For 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 onth
15、e ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.2.6 filtratethe fluid that has passed through the filter.F7403.2.7 filtrationthe process
16、by which particles are sepa-rated from a fluid by passing the fluid through a permeablematerial.F7403.2.8 filtered samplea groundwater sample which haspassed through a filter medium.3.2.8.1 DiscussionThis type of sample may also be re-ferred to as a“dissolved”sample.An unfiltered samplecontaining dissolved,sorbed,coprecipitated and all suspendedparticles may be referred to as a“total”sample.3.2.9 particlea small discrete mass of solid or liquidmatter.F7404.Significance and Use4.1 A properly desi
