Erratum for ‘Vertical screening distances for total petroleum hydrocarbon for vapour intrusion risk assessment at petroleum underground storage tank sites’ Quarterly Journal of Engineering Geology and Hydrogeology, 51, 3–12

2018 ◽  
Vol 51 (2) ◽  
pp. 299-299
Author(s):  
Matthew A. Lahvis
Keyword(s):  
Risk Assessment ◽  
Storage Tank ◽  
Petroleum Hydrocarbon ◽  
Engineering Geology ◽  
Quarterly Journal ◽  
Total Petroleum Hydrocarbon ◽  
Underground Storage ◽  
Underground Storage Tank

scholarly journals AnIn SilicoApproach for Evaluating a Fraction-Based, Risk Assessment Method for Total Petroleum Hydrocarbon Mixtures

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Nina Ching Y. Wang ◽  
Glenn E. Rice ◽  
Linda K. Teuschler ◽  
Joan Colman ◽  
Raymond S. H. Yang
Keyword(s):  
Risk Assessment ◽  
Petroleum Hydrocarbon ◽  
Environmental Fate ◽  
Assessment Method ◽  
Total Petroleum Hydrocarbon ◽  
Field Analysis ◽  
Chemical Methods ◽  
Risk Assessment Method ◽  
Risk Of Exposure ◽  
Mixture Risk Assessment

Both the Massachusetts Department of Environmental Protection (MADEP) and the Total Petroleum Hydrocarbon Criteria Working Group (TPHCWG) developed fraction-based approaches for assessing human health risks posed by total petroleum hydrocarbon (TPH) mixtures in the environment. Both organizations defined TPH fractions based on their expected environmental fate and by analytical chemical methods. They derived toxicity values for selected compounds within each fraction and used these as surrogates to assess hazard or risk of exposure to the whole fractions. Membership in a TPH fraction is generally defined by the number of carbon atoms in a compound and by a compound's equivalent carbon (EC) number index, which can predict its environmental fate. Here, we systematically and objectively re-evaluate the assignment of TPH to specific fractions using comparative molecular field analysis and hierarchical clustering. The approach is transparent and reproducible, reducing inherent reliance on judgment when toxicity information is limited. Our evaluation of membership in these fractions is highly consistent (̃80% on average across various fractions) with the empirical approach of MADEP and TPHCWG. Furthermore, the results support the general methodology of mixture risk assessment to assess both cancer and noncancer risk values after the application of fractionation.

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