1、Designation:D549521Standard Practice forSampling with a Composite Liquid Waste Sampler(COLIWASA)1This standard is issued under the fixed designation D5495;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A nu
2、mber in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice describes the procedure for samplingliquids with the composite liquid waste sampler,or“COLI-WASA.”The COLIWASA is an appropriat
3、e device for obtain-ing a representative sample from stratified or unstratifiedliquids.Its most common use is for sampling containerizedliquids,such as tanks,barrels,and drums.It may also be usedfor pools and other open bodies of stagnant liquid.NOTE1Alimitation of the COLIWASAis that the stopper me
4、chanismmay not allow collection of approximately the bottom 2.54 cm(1 in.)ofmaterial,depending on construction of the stopper.1.2 The COLIWASA should not be used to sample flowingor moving liquids.1.3 UnitsThe values stated in SI units are to be regardedas standard.No other units of measurement are
5、included in thisstandard.All observed and calculated values shall conform tothe guidelines for significant digits and rounding established inPractice D6026.Reporting of test results in units other than SIshall not be regarded as nonconformance with this standard.1.4 This standard does not purport to
6、 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.1.5 This international standard was devel
7、oped 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 Document
8、s2.1 ASTM Standards:2D4687 Guide for General Planning of Waste SamplingD5088 Practice for Decontamination of Field EquipmentUsed at Waste SitesD5283 Practice for Generation of Environmental Data Re-lated to Waste Management Activities:Quality Assuranceand Quality Control Planning and ImplementationD
9、5681 Terminology for Waste and Waste ManagementD5743 Practice for Sampling Single or MultilayeredLiquids,With or Without Solids,in Drums or SimilarContainersD6026 Practice for Using Significant Digits in GeotechnicalDataD6232 Guide for Selection of Sampling Equipment forWaste and Contaminated Media
10、Data CollectionActivities3.Terminology3.1 DefinitionsFor definitions of terms used in thisstandard,see Terminology D5681.4.Summary of Practice4.1 A clean device is slowly lowered into the liquid to besampled.After it has filled,the bottom of the sampling tube isclosed and the device is retrieved.The
11、 contents are subse-quently discharged into a sample container.5.Significance and Use5.1 This practice is applicable to sampling liquid wastes andother stratified liquids.The COLIWASA is used to obtain avertical column of liquid representing an accurate cross sectionof the sampled material.To obtain
12、 a representative sample ofstratified liquids,the COLIWASA should be open at both ends1This practice is under the jurisdiction of ASTM Committee D34 on WasteManagement and is the direct responsibility of Subcommittee D34.01.03 onSampling Equipment.Current edition approved May 1,2021.Published May 20
13、21.Originallyapproved in 1994.Last previous edition approved in 2016 as D5495 03(2016).DOI:10.1520/D5495-21.2For 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
14、 Document Summary page onthe ASTM website.Copyright 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 P
15、rinciples for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1so that material flows through it as it is slowly lowered to thedesired sampling depth.The COLIWASA must not be loweredwith the stopper
16、 in place.Opening the stopper after the tube issubmerged will cause material to flow in from the bottom layeronly,resulting in gross over-representation of that layer.5.2 This practice is to be used by personnel acquiringsamples.5.3 This practice should be used in conjunction with GuideD4687 which covers sampling plans,safety,QA,preservation,decontamination,labeling,and chain-of-custody procedures;Practice D5088 which covers decontamination of field equip-ment used at waste sites;Practice D5283
