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SubmittedVISLAbstract
Control/TrackingNumber:2016-A-3674-SOT
Activity:Abstract
CurrentDate/Time:10/7/2015 8:30:09 PM
AuthorBlockLeslie Galloway1,FredDolislager1,Stephine Smith2,AliciaM.Frame3, LindaG. T.
Gaines3
1The Institute forEnvironmental Modeling,The Universityof Tennessee,Knoxville,Knoxville,
TN,2The Universityof Tennessee,Knoxville,Knoxville,TN,3Office of SuperfundRemediation&
TechnologyInnovationSciencePolicyBranch,EnvironmentalProtectionAgency,Washington,
DC
Web-basedCalculatorforVaporIntrusionScreeningLevels(VISL)
Abstract:
The U.S. Environmental ProtectionAgencyOfficeof RemediationandTechnologyInnovation
(OSRTI),throughaninteragencyagreementwithOakRidge National Laboratory(ORNL), has
developedanonline calculatorforvaporintrusionscreeninglevels(VISL).Thistool provides
screeninglevel concentrationsforgroundwater,soil gas(sub-slabandexterior),andindoorair
for certainqualifyingchemicalstoassistriskassessorsindeterminingrisksdue tovapor
intrusion.The screeninglevelsforgroundwaterandsoil gas(eithersub-slabgasorsoil gas
collectedbeloworadjacenttobuildings) are calculatedfromthe targetindoorair
concentrationsusingempirically-basedconservative “generic”attenuationfactorsthatreflect
generallyreasonableworst-caseconditionsasdescribedinthe EPA’sdraftvaporintrusion
guidance (EPA 2002). The default,genericVISLsare basedondefaultexposure parametersand
factors thatrepresent ReasonableMaximumExposure (RME) conditionsforlong-term/chronic
exposures.Inadditiontocalculatingscreeninglevels,thistool canestimate calculateindoorair
concentrationsfromsoil gasandgroundwaterconcentrationsenteredbythe userandgeneric,
empirically-derivedattenuationfactors. Inaddition,riskvaluesfromindoorairconcentrations
and user-providedexposure parameterscanbe calculated.Thisnew tool will be useful for
concernedcitizens,riskassessorsandriskmanagers.

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Submitted VISL Abstract

  • 1. SubmittedVISLAbstract Control/TrackingNumber:2016-A-3674-SOT Activity:Abstract CurrentDate/Time:10/7/2015 8:30:09 PM AuthorBlockLeslie Galloway1,FredDolislager1,Stephine Smith2,AliciaM.Frame3, LindaG. T. Gaines3 1The Institute forEnvironmental Modeling,The Universityof Tennessee,Knoxville,Knoxville, TN,2The Universityof Tennessee,Knoxville,Knoxville,TN,3Office of SuperfundRemediation& TechnologyInnovationSciencePolicyBranch,EnvironmentalProtectionAgency,Washington, DC Web-basedCalculatorforVaporIntrusionScreeningLevels(VISL) Abstract: The U.S. Environmental ProtectionAgencyOfficeof RemediationandTechnologyInnovation (OSRTI),throughaninteragencyagreementwithOakRidge National Laboratory(ORNL), has developedanonline calculatorforvaporintrusionscreeninglevels(VISL).Thistool provides screeninglevel concentrationsforgroundwater,soil gas(sub-slabandexterior),andindoorair for certainqualifyingchemicalstoassistriskassessorsindeterminingrisksdue tovapor intrusion.The screeninglevelsforgroundwaterandsoil gas(eithersub-slabgasorsoil gas collectedbeloworadjacenttobuildings) are calculatedfromthe targetindoorair concentrationsusingempirically-basedconservative “generic”attenuationfactorsthatreflect generallyreasonableworst-caseconditionsasdescribedinthe EPA’sdraftvaporintrusion guidance (EPA 2002). The default,genericVISLsare basedondefaultexposure parametersand factors thatrepresent ReasonableMaximumExposure (RME) conditionsforlong-term/chronic exposures.Inadditiontocalculatingscreeninglevels,thistool canestimate calculateindoorair concentrationsfromsoil gasandgroundwaterconcentrationsenteredbythe userandgeneric, empirically-derivedattenuationfactors. Inaddition,riskvaluesfromindoorairconcentrations and user-providedexposure parameterscanbe calculated.Thisnew tool will be useful for concernedcitizens,riskassessorsandriskmanagers.