ASTM_D_6725_-_04_2010.pdf

Designation:D672504(Reapproved 2010)Standard Practice forDirect Push Installation of Prepacked Screen MonitoringWells in Unconsolidated Aquifers1This standard is issued under the fixed designation D6725;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 is based on recognized methods by whichdirect push monitoring wells may be designed and installed forthe purpose of detecting the presence or absence of acontaminant,and collecting representative groundwater qualitydata.The design standards and installation procedures hereinare applicable to both detection and assessment monitoringprograms for facilities.1.2 The recommended monitoring well design,as presentedin this practice,is based on the assumption that the objective ofthe program is to obtain representative groundwater informa-tion and water quality samples from aquifers.Monitoring wellsconstructed following this practice should produce relativelyturbidity-free samples for granular aquifer materials rangingfrom gravels to silty sand.Strata having grain sizes smallerthan the recommended design for the smallest diameter filterpack materials should be monitored by alternative monitoringwell designs which are not addressed in this practice.1.3 Direct push procedures are not applicable for monitor-ing well installation under all geologic and soil conditions(forexample,installation in bedrock).Other rotary drilling proce-dures are available for penetration of these consolidatedmaterials for well construction purposes(Guide D5092).Additionally,under some geologic conditions it may be appro-priate to install monitoring wells without a filter pack(EPA1991).Guide D6724 may be referred to for additional infor-mation on these and other methods for the direct pushinstallation of groundwater monitoring wells.1.4 The values stated in inch-pound units are to be regardedas standard.The values in parentheses are for information only.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 practice offers a set of instructions for performingone or more specific operations.This document cannot replaceeducation or experience and should be used in conjunctionwith professional judgement.Not all aspects of this practicemay be applicable in all circumstances.This ASTM standard isnot intended to represent or replace the standard of care bywhich the adequacy of a given professional service must bejudged,nor should this document be applied without consid-eration of the projects many unique aspects.The word“Standard”in the title of this document means only that thedocument has been approved through the ASTM consensusprocess.2.Referenced Documents2.1 ASTM Standards:2D1452 Practice for Soil Exploration and Sampling by AugerBoringsD1587 Practice for Thin-Walled Tube Sampling of Soils forGeotechnical PurposesD2488 Practice for Description and Identification of Soils(Visual-Manual Procedure)D3694 Practices for Preparation of Sample Containers andfor Preservation of Organic ConstituentsD4043 Guide for Selection of Aquifer Test Method inDetermining Hydraulic Properties by Well TechniquesD4044 Test Method for(Field Procedure)for InstantaneousChange in Head(Slug)Tests for Determining HydraulicProperties of AquifersD4104 Test Method(Analytical Procedure)for DeterminingTransmissivity of Nonleaky Confined Aquifers by Over-damped Well Response to Instantaneous Change in Head(Slug Tests)D4448 Guide for Sampling Ground-Water Monitoring WellsD4700 Guide for Soil Sampling from the Vadose ZoneD5088 Practice for Decontamination of Field EquipmentUsed at Waste SitesD5092 Practice for Design and Installation of GroundwaterMonitoring Wells1This practice is under the jurisdiction of ASTM Committee D18 on Soil andRock and is the direct responsibility of Subcommittee D18.21 on Groundwater andVadose Zone Investigations.Current edition approved July 1,2010.Published September 2010.Originallyapproved in 2001.Last previous edition approved in 2004 as D672504.DOI:10.1520/D6725-04R10.2For 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 D5314 Guide for Soil Gas Monitoring in the Vadose ZoneD5521 Guide for Development of Groundwater MonitoringWells in Granular AquifersD5778 Test Method for Electronic Friction Cone and Piezo-cone Penetrati