ASTM_D_6538_-_12.pdf

Designation:D653812Standard Guide forSampling Wastewater With Automatic Samplers1This standard is issued under the fixed designation D6538;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 guide covers the selection and use of automaticwastewater samplers including procedures for their use inobtaining representative samples.Automatic wastewater sam-plers are intended for the unattended collection of samples thatare representative of the parameters of interest in the waste-water body.While this guide primarily addresses the samplingof wastewater,the same automatic samplers may be used tosample process streams and natural water bodies.1.2 The guide does not address general guidelines forplanning waste sampling activities(see Guide D4687),devel-opment of data quality objectives(see Practice D5792),thedesign of monitoring systems and determination of the numberof samples to collect(see Practice D6311),operational detailsof any specific type of sampler,in-situ measurement ofparameters of interest,data assessment and statistical interpre-tation of resultant data(see Guide D6233),or sampling andfield quality assurance(see Guide D5612).It also does notaddress sampling groundwater.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.3.1 ExceptionThe inch-pound units given in parenthesesare for information only.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:2D4687 Guide for General Planning of Waste SamplingD5088 Practice for Decontamination of Field EquipmentUsed at Waste SitesD5612 Guide for Quality Planning and Field Implementa-tion of a Water Quality Measurement ProgramD5681 Terminology for Waste and Waste ManagementD5792 Practice for Generation of Environmental Data Re-lated to Waste Management Activities:Development ofData Quality ObjectivesD6233 Guide for Data Assessment for Environmental WasteManagement ActivitiesD6311 Guide for Generation of Environmental Data Relatedto Waste Management Activities:Selection and Optimiza-tion of Sampling Design3.Terminology3.1 DefinitionsFor definitions of terms used in this guide,refer to Terminology D5681.4.Significance and Use4.1 This guide provides persons responsible for designingand implementing wastewater sampling programs with a sum-mary of the types of automatic wastewater samplers,discussesthe advantages and disadvantages of the different types ofsamplers and addresses recommended procedures for their use.The field settings are primarily,but not limited to,open channelflows in enclosed(e.g.,sewer)systems or open(e.g.,streams oropen ditches,and sampling pressure lines)systems.5.Automatic Versus Manual Sampling(1,2)35.1 The advantages and disadvantages of manual and auto-matic sampling are summarized in Table 1.The decision as towhether to use manual or automatic sampling involves manyconsiderations in addition to equipment costs.In general,manual sampling is indicated when infrequent samples arerequired from a site,when biological or sediment samples,orboth,are also required,when investigating special incidents,where sites will not allow the use of automatic devices,formost bacteriological sampling,where concentrations remainrelatively constant,etc.The use of automatic samplers isindicated where frequent sampling is required at a given site,where long-term compositing is desired,where simultaneous1This guide 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 Sept.1,2012.Published December 2012.Originallyapproved in 2000.Last previous edition approved in 2010 as D6538-10.DOI:10.1520/D6538-12.2For 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.3The boldface numbers given in parentheses refer to a list of references at theend of the standard.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 sampling at many sites is necessary,etc.Automatic sampling isoften the method of choice for storm-generated dischargestudies,for longer outfall monitoring,for treatment plantefficiency studies,where 24-h composite samples are required,etc.The user should review 7.1.23 before selecting manual orautomatic sampling.6.Types of Samples C