1、Designation:D735218Standard Practice forVolatile Contaminant Logging Using a Membrane InterfaceProbe(MIP)in Unconsolidated Formations with Direct PushMethods1This standard is issued under the fixed designation D7352;the number immediately following the designation indicates the year oforiginal adopt
2、ion 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.Scope*1.1 This standard practice describes a field procedure for therapid delineation of
3、volatile organic compounds(VOC)in thesubsurface using a membrane interface probe.Logging withthe membrane interface probe is usually performed with directpush(DP)equipment.DP methods are typically used in soilsand unconsolidated formations,not competent rock.1.2 This standard practice describes how
4、to obtain a realtime vertical log of VOCs with depth.The data obtained isindicative of the total VOC level in the subsurface at depth.The MIP detector responses provide insight into the relativecontaminant concentration based upon the magnitude of detec-tor responses and a determination of compound
5、class basedupon which detectors of the series respond.1.3 The use of a lithologic logging tool is highly recom-mended to define hydrostratigraphic conditions,such as migra-tion pathways,and to guide confirmation sampling and reme-diation efforts.Other sensors,such as electrical conductivity,hydrauli
6、c profiling tool,fluorescence detectors,and conepenetration tools may be included to provide additional infor-mation.1.4 Since MIP results are not quantitative,soil and watersampling(Guides D6001,D6282,D6724,and Practice D6725)methods are needed to identify specific analytes and exactconcentrations.
7、MIP detection limits are subject to the selec-tivity of the gas phase detector applied and characteristics ofthe formation being penetrated(for example:permeability,saturation,clay and organic carbon content).1.5 The values stated in either SI units or inch-pound unitsgiven in brackets are to be reg
8、arded separately as standard.The values stated in each system may not be exact equivalents;therefore,each system shall be used independently of the other.Combining values from the two systems may result in non-conformance with the standard.Reporting of test results inunits other than SI shall not be
9、 regarded as nonconformancewith this standard.1.6 All observed and calculated values shall conform to theguidelines for significant digits and rounding established inPractice D6026,unless superseded by this standard.1.6.1 The procedures used to specify how data is collected/recorded and calculated i
10、n the standard are regarded as theindustry standard.In addition,they are representative of thesignificant digits that generally should be retained.The proce-dures used do not consider material variation,purpose forobtaining the data,special purpose studies,or any consider-ations for the users object
11、ives;and it is common practice toincrease or reduce significant digits of reported data to becommensurate with these considerations.It is beyond the scopeof these test methods to consider significant digits used inanalytical methods for engineering data.1.7 This practice offers a set of instructions
12、 for performingone or more specific operations.This document cannot replaceeducation or experience and should be used in conjunctionwith professional judgment.Not all aspects of this practice maybe applicable in all circumstances.This ASTM standard is notintended to represent or replace the standard
13、 of care by whichthe adequacy of a given professional service must be judged,nor should this document be applied without the considerationof a projects many unique aspects.The word“standard”in thetitle means that the document has been approved through theASTM consensus process.1.8 This standard does
14、 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.9 This international sta
15、ndard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.1This
16、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 15,2018.Published August 2018.Originallyapproved in 2007.Last previous edition approved in 2012 as D735207(2012).DOI:10.1520/D7352-18.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.Un
