ASTM_D_7353_-_07_2013.pdf

Designation:D735307(Reapproved 2013)Standard Practice forSampling of Liquids in Waste Management Activities Usinga Peristaltic Pump1This standard is issued under the fixed designation D7353;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.Scope1.1 This practice covers the use of a peristaltic pump forsampling liquids from multiple depths.It is applicable for awide range of fluids including:high-viscosity fluids,aggressiveand corrosive fluids,high-purity solutions and abrasive fluids.It is especially useful for sampling liquids that require com-plete isolation from the pump.1.2 This practice includes the determination of sampledepth,pump set up and collecting a sample to be analyzed.1.3 This practice is not intended to give detailed instructionsfor running a peristaltic pump or recommend which peristalticpump to purchase.It instructs the field personnel how toconnect the pump and collect a sample.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.Referenced Documents2.1 ASTM Standards:2D4448 Guide for Sampling Ground-Water Monitoring WellsD4687 Guide for General Planning of Waste SamplingD4840 Guide for Sample Chain-of-Custody ProceduresD5681 Terminology for Waste and Waste ManagementD5792 Practice for Generation of Environmental Data Re-lated to Waste Management Activities:Development ofData Quality ObjectivesD5956 Guide for Sampling Strategies for HeterogeneousWastesD6044 Guide for Representative Sampling for Managementof Waste and Contaminated MediaD6063 Guide for Sampling of Drums and Similar Containersby Field PersonnelD6232 Guide for Selection of Sampling Equipment forWaste and Contaminated Media Data CollectionActivitiesD6250 Practice for Derivation of Decision Point and Confi-dence Limit for Statistical Testing of Mean Concentrationin Waste Management DecisionsD6311 Guide for Generation of Environmental Data Relatedto Waste Management Activities:Selection and Optimiza-tion of Sampling DesignD6634 Guide for Selection of Purging and Sampling De-vices for Groundwater Monitoring Wells3.Terminology3.1 Definitions:3.2 See Terminology D5681.4.Summary of Practice4.1 Aperistaltic pump is a suction lift pump(see Fig.1b).Alength of polytetrafluoroethylene(PTFE)or other suitabletubing such as Silastic tubing is placed in the liquid at anydepth up to 7.6 m(25 ft.)for water or less depending upon thedensity of the sample being taken.The other end is connectedto the piece of flexible tubing which has been threaded aroundthe rotor of the peristaltic pump(see Fig.1a).A second pieceof PTFE or other suitable tubing is connected to the dischargeend of the flexible tubing to allow the liquid to be containerizedor sampled.One can fill a vacuum-worthy sample containerafter attaching two tubes to it,one from the top of the pumpinlet,and the other from a lower level to the source(see Fig.1c).5.Significance and Use5.1 This practice can be used in sampling drums,tanks,andsimilar containers and in sampling monitoring and waste wellsincluding small diameter(1 in.)wells.The pump can collectsamples from multiple depths.The samples can be high-viscosity fluids,aggressive and corrosive fluids,high-puritysolutions and abrasive fluids.The pump can be used to mixsamples(see D6063).5.2 Peristaltic pumps use a vacuum to transport the samples.This vacuum may cause some degassing and loss of volatile1This 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 Feb.1,2013.Published February 2013.Originallyapproved in 2007.Last previous edition approved in 2007 as D7353 07.DOI:10.1520/D7353-07R13.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 organic compounds(VOCs)from the sample.When precisequantitative data for VOCs and dissolved gases are notrequired,peristaltic pumps may be used.5.3 The pump is self-priming,runs dry without damage,andis completely isolated from the pumped fluid.A sample can betaken on the intake or discharge side of the pump.5.4 Some additional advantages of the peristaltic pump are:decontamination of the pump motor is not necessary and thetubing in the pump is disposable and easy to replace.Thepumps can be easily started and stopped an