ASTM_D_7648_-_12.pdf

Designation:D764812Standard Practice forActive Soil Gas Sampling for Direct Push or Manual-DrivenHand-Sampling Equipment1This standard is issued under the fixed designation D7648;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 details the collection of active soil gassamples using a variety of sample collection techniques withtooling associated with direct push drilling technology(DPT)or manual-driven hand-sampling equipment,for the expresspurpose of conducting soil gas surveys.1.2 This practice proceeds on the premise that soil gassurveys are primarily used for two(2)purposes,1)as apreliminary site investigative tool and 2)for the monitoring ofongoing remediation activities.1.3 The practicality of field use demands that soil gassurveys are relatively accurate,as well as being simple,quick,and inexpensive.This guide suggests that the objective of soilgas surveys is linked to three factors:1.3.1 VOC detection and quantitation,including determina-tion of depth of VOC contamination.1.3.2 Sample retrieval ease and time.1.3.3 Cost.1.4 This practice will likely increase the awareness of afundamental difference between soil gas sampling for thepurpose of soil gas surveys versus sub-slab or vapor intrusioninvestigations or both.Specifically,the purpose of a soil gassurvey is to provide quick and inexpensive data to theinvestigator that will allow the investigator to 1)develop a siteinvestigation plan that is strategic in its efforts,2)determinesuccess or progress of on-going remedial activities,or 3)selectthe most suitable subsequent investigation equipment,or com-binations thereof.On the other hand,the objective of soil gassampling for sub-slab and vapor intrusion investigations(1,2,3,2etc.)is not preliminary,but rather the end result of the siteinvestigation or long-term precise monitoring.As such,strin-gent sampling methods and protocol are necessary for precisesamples and data collection.1.5 Details included in this practice include a broad spec-trum of practices and applications of soil gas surveys,includ-ing:1.5.1 Sample recovery and handling,1.5.2 Sample analysis,1.5.3 Data interpretation,and1.5.4 Data reporting.1.6 This practice suggests a variety of approaches useful toconducting successful soil gas surveys but cannot replaceeducation or experience and should be used in conjunction withprofessional judgment.Not all aspects of this practice may beapplicable in all circumstances.This ASTM standard is notintended to represent or replace the standard of care by whichthe adequacy of a given professional service must be judged,nor should this document be applied without consideration ofa projects many unique aspects.1.7 This practice offers an organized collection of informa-tion or a series of options and does not recommend a specificcourse of action.The success of any one soil gas surveymethodology is strongly dependent upon the environment inwhich it is applied.1.8 This practice is not to be used for long term monitoringof contaminated sites or for site closure conformation.1.9 This practice is not to be used for passive determinationof flow patterns at contaminated sites.1.10 This practice does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this practice to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.1.11 This practice does not purport to set standard levels ofacceptable risk.Use of this practice for purposes of riskassessment is wholly the responsibility of the user.1.12 Concerns of practitioner liability or protection from orrelease from such liability,or both,are not addressed by thispractice.1This 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 March 1,2012.Published April 2012.DOI:10.1520/D7648-12.2The boldface numbers in parentheses refer to a list of references at the end ofthis standard.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 2.Referenced Documents2.1 ASTM Standards:3D653 Terminology Relating to Soil,Rock,and ContainedFluidsD1356 Terminology Relating to Sampling and Analysis ofAtmospheresD1357 Practice for Planning the Sampling of the AmbientAtmosphereD1452 Practice for Soil Exploration and Sampling by AugerBoringsD3249 Practice for General Ambient Air Analyzer Proce-duresD3614 Guide for Laboratories Engaged in Sampling andAnalysis of Atmospheres and EmissionsD5314 Guide for Soil Gas Monitoring in the Vadose ZoneD6196 Practice for Selection of Sorbents,Sampling,andTherma