ASTM_D_7663_-_12.pdf

Designation:D766312Standard Practice forActive Soil Gas Sampling in the Vadose Zone for VaporIntrusion Evaluations1This standard is issued under the fixed designation D7663;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 PurposeThis practice covers standardized techniquesfor actively collecting soil gas samples from the vadose zonebeneath or near dwellings and other buildings.1.2 ObjectivesObjectives guiding the development of thispractice are:(1)to synthesize and put in writing good com-mercial and customary practice for active soil gas sampling,(2)to provide an industry standard for soil gas sampling performedin support of vapor intrusion evaluations that is practical andreasonable.1.3 This practice allows a variety of techniques to be usedfor collecting soil gas samples because different techniquesmay offer certain advantages for specific applications.Threetechniques are presented:sampling at discrete depths,samplingover a small screened interval,and sampling using permanentvapor monitoring wells.1.4 Some of the recommendations require knowledge ofpressure differential and tracer gas concentration measure-ments.1.5 The values stated in SI units shall be regarded asstandard.Other units are shown for information only.1.6 This practice does not address requirements of anyfederal,state,or local regulations or guidance,or both,withrespect to soil gas sampling.Users are cautioned that federal,state,and local guidance may impose specific requirementsthat differ from those of this practice.1.7 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.1.8 This practice offers a set of instructions for performingone or more specific operations.This document 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 practice 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.The word“Standard”in thetitle means only that the document has been approved throughthe ASTM consensus process.2.Referenced Documents2.1 ASTM Standards:2D653 Terminology Relating to Soil,Rock,and ContainedFluidsD854 Test Methods for Specific Gravity of Soil Solids byWater PycnometerD1356 Terminology Relating to Sampling and Analysis ofAtmospheresD1946 Practice for Analysis of Reformed Gas by GasChromatographyD2216 Test Methods for Laboratory Determination of Water(Moisture)Content of Soil and Rock by MassD2487 Practice for Classification of Soils for EngineeringPurposes(Unified Soil Classification System)D3404 Guide for Measuring Matric Potential in VadoseZone Using TensiometersD4696 Guide for Pore-Liquid Sampling from the VadoseZoneD4700 Guide for Soil Sampling from the Vadose ZoneD5088 Practice for Decontamination of Field EquipmentUsed at Waste SitesD5092 Practice for Design and Installation of GroundwaterMonitoring WellsD5314 Guide for Soil Gas Monitoring in the Vadose ZoneD5466 Test Method for Determination of Volatile OrganicChemicals in Atmospheres(Canister Sampling Methodol-ogy)D5504 Test Method for Determination of Sulfur Compounds1This 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 15,2012.Published April 2012.Originallyapproved in 2011.Last previous edition approved in 2011 as D766311.DOI:10.1520/D7663-12.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 in Natural Gas and Gaseous Fuels by Gas Chromatogra-phy and ChemiluminescenceD6196 Practice for Selection of Sorbents,Sampling,andThermal Desorption Analysis Procedures for Volatile Or-ganic Compounds in AirD6725 Practice for Direct Push Installation of PrepackedScreen Monitoring Wells in Unconsolidated AquifersE741 Test Method for Determining Air Change in a SingleZone by Means of a Tracer Gas DilutionE2024 Test Methods for Atmospheric Leaks Using a Ther-mal Conductivity Leak DetectorF1815 Test Methods for Saturated Hydraulic Conductivity,Water Retention,Porosity,and Bulk Density of Athleti