Soil Generic Assessment Criteria for Human Health Risk ... - ESdat

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sec-Butylbenzene CAS 135-98-8 Assessor A: J Thornton, Golder Assessor B: N Dixon, WorleyParsons Final review: Panel/SF
Associates
Date 15/04/2009 Date 06/05/2009 Date 28/08/2009
MDI Recommended MDIoral Units
0 ug day-1
MDI Recommended MDIinh Units
5.4 ug day-1
Justification: No data, assumed negligible.
Justification: Only value found (TOXNET), upper estimate used. Converted from data assuming 1ppb =
5.49μg/m3, and an adult breathes 20m3/day.
Organisation Date Media Value Units Description Reference Web link
Toxicological Data Network
(TOXNET)
14/04/2009 Ambient air 5.4 ug day-1 National survey of ambient air, which included five site
types (remote, rural, suburban, urban, and source
dominated) the average daily atmospheric concns of
sec-butylbenzene was 0.033 and 0.049 ppb volume for
137 suburban and 279 urban samples, respectively.
1ppb = 5.49μg/m3, so 0.049ppb = 0.267μg/m3.
Converted to 5.4μg/day assuming an adult breathes
20m3/day.
Shah JJ, Heyerdahl EK; National
Ambient VOC Database
Update USEPA-600/3-88/010
(1988)
http://toxnet.nlm.ni
h.gov/
(Page 1 of 1) (EIC proforma sec butylbenzene.xls 28/08/2009)