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Titolo:
Indoor air inhalation risk assessment for volatiles emanating from light nonaqueous phase liquids
Autore:
Chowdhury, S; Brock, SL;
Indirizzi:
WPI, San Antonio, TX USA WPI San Antonio TX USAWPI, San Antonio, TX USA
Titolo Testata:
SOIL & SEDIMENT CONTAMINATION
fascicolo: 4, volume: 10, anno: 2001,
pagine: 387 - 403
SICI:
1532-0383(2001)10:4<387:IAIRAF>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
BUILDINGS;
Keywords:
indoor air; risk assessment; volatilization; JP-4 mixtures; LNAPL; Johnson and Ettinger;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
15
Recensione:
Indirizzi per estratti:
Indirizzo: Chowdhury, S WPI, 10010 San Pedro Ave 310, San Antonio, TX USA WPI 10010 San Pedro Ave 310 San Antonio TX USA tonio, TX USA
Citazione:
S. Chowdhury e S.L. Brock, "Indoor air inhalation risk assessment for volatiles emanating from light nonaqueous phase liquids", SOIL SEDIM, 10(4), 2001, pp. 387-403

Abstract

The indoor air inhalation pathway for volatile contaminants in soil and groundwater has received much attention recently. The risk of exposure may behigher when volatile organic compounds (VOCs) reside as constituents of a free product plume below residential or commercial structures than when dissolved in groundwater or adsorbed on soil. A methodology was developed for assessing the potential for vapor phase migration-and associated risk of indoor air inhalation-of volatile constituents from a light nonaqueous phase liquid (LNAPL) plume on top of the water table. The potential risk from inhalation of VOCs in indoor air emanating from a subsurface Jet Fuel 4 (JP-4)plume by hypothetical residential receptors was assessed at a site. Chemicals of concern (COCs) were identified and evaluated using data from the composition of JP-4 mixtures and published chemical, physical, and toxicological data. The method estimates the equilibrium vapor concentrations of JP-4 constituents using Raoult's Law for partial vapor pressure of mixtures based on assumptions about the mixture composition of JP-4. The maximum allowable vapor concentration at the source (immediately above the LNAPL) corresponding to an indoor air target concentration based on acceptable risk levelsare calculated using the Johnson and Ettinger model. The model calculates the attenuation factor caused by the migration of the vapor phase VOCs through the soil column above the JP-4 plume and through subsurface foundation slabs. Finally, the maximum allowable soil gas concentrations above the LNAPL for individual constituents were calculated using this methodology and compared to the calculated equilibrium vapor concentrations of each COC to assess the likelihood of potential risk from the indoor air inhalation pathway.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/01/21 alle ore 12:46:15