ASTM_D_8231_-_19.pdf

Designation:D823119Standard Practice forthe Use of a Low Voltage Electronic Scanning System forDetecting and Locating Breaches in Roofing andWaterproofing Membranes1This standard is issued under the fixed designation D8231;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 describes standard procedures for using anelectronic scanning system to locate membrane breaches onboth horizontal and vertical surfaces to locate potential leaks inexposed roofing and waterproofing membranes.1.2 This practice addresses the need for a detailed technicaldescription of a scanning method and procedures that are usedto test and verify the integrity of membranes.1.3 This practice is not intended to replace visual or othermethods of inspection.It is to be used in conjunction with othermethods of roof inspection when specified.1.4 This practice requires that the detection and locationequipment,procedures,and survey parameters used are cali-brated to meet established minimum leak detection sensitivity.The detection sensitivity calibration must be verified on aregular basis using the manufacturers procedures to assuremaximum confidence in the results.1.5 Scanning surveys can be used on membranes installedon roofs,plaza decks,pools,water features,covered reservoirs,and other roofing and waterproofing applications.1.6 This practice is applicable for membranes made ofelectrically insulating materials and is used on certain moder-ately conductive membranes(see Test Method D4496).1.7 This practice provides a description of the scanningmethod and equipment for locating membrane breaches usingelectric conductance and is intended to be used in conjunctionwith the manufacturers instructions for the proper operationand use of the equipment.1.8 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.9 This international standard 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.2.Referenced Documents2.1 ASTM Standards:2D1079 Terminology Relating to Roofing and WaterproofingD4496 Test Method for D-C Resistance or Conductance ofModerately Conductive MaterialsD7877 Guide for Electronic Methods for Detecting andLocating Leaks in Waterproof Membranes2.2 NFPA Standards:3NFPA 70 National Electrical Code3.Terminology3.1 For definitions of terms,see Terminology D1079 and theterminology section of Guide D7877.3.2 Definitions of Terms Specific to This Standard:3.2.1 membrane scanning,na method for locating mem-brane breaches by passing a leak detection sensor over theentire surface of the membrane being tested.3.2.2 moderately conductive,adjmaterials that exhibit asurface resistivity in the range of 103to 107ohms-per-square.3.2.3 ohms-per-square,nthe unit of measurement whenmeasuring the resistance of a thin film of a material using thefour point probe technique.It is equal to the resistance betweentwo electrodes on opposite sides of a theoretical square.Thesize of the square is unimportant.NOTE1Waterproofing membranes tested by electrical conductancemethods may be horizontal,sloped,or vertical.NOTE2Examples of waterproofing membranes included in this1This practice is under the jurisdiction ofASTM Committee D08 on Roofing andWaterproofing and is the direct responsibility of Subcommittee D08.22 on Water-proofing and Dampproofing Systems.Current edition approved July 1,2019.Published July 2019.DOI:10.1520/D8231-19.2For 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.3Available from National Fire Protection Association(NFPA),1 BatterymarchPark,Quincy,MA 02169-7471,http:/www.nfpa.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 practice are:below-grade waterproofing membranes,above-grade water-proofing membranes,waterproofing membranes covered by wearingcourses,vegetative roof m