Values not currently included in the chemical parameter Regional screening table (see footnote a) were derived following the hierarchy outlined in the Regional Screening Tables User’s Guide.
RSLS – Based on values reported in the U.S. EPA Regional Screening Tables.  May 2014.
EPI – Experimental values. USEPA 2009.  Estimation Programs Interface Suite™ for Microsoft® Windows, v 4.00. United States Environmental Protection Agency, Washington, DC, USA.
If the source has a trailing “e” the value is an estimated value rather than an experimental value.
If the source has a trailing “ex” the value is an extrapolated value. Extrapolated data is based upon experimental measurement outside the temperature range of the reported value.
SSG – USEPA 1996.  Soil Screening Guidance.  Attachment C: Chemical Properties for SSL Development.  EPA540/R-96/018.  July, 1996.
WATER9 – USEPA 2001.  USEPA WATER9, Version 2.0.  United States Environmental Protection Agency, Research Triangle Park, NC, USA.
SPHYSPROP – Syracuse Research Corporation (SRC). 2005. PHYSPROP Database. SRC. Syracuse, NY.
CRC – CRC Handbook of Chemistry and Physics, 76th Edition
NIST – National Institute of Standards and Technology (NIST).  Chemistry WebBook.
EPA201 – USEPA, 2001.  FACT SHEET Correcting the Henry’s Law Constant for Soil Temperature.  Attachment.
Weast – Weast, Robert C. CRC Handbook of Chemistry and Physics 1984-1985, 65th edition. Pages F-62 through F-64.
MCKay – McKay, D., et al. Handbook of Physical-Chemical Properties and Environmental Fate for Organic Chemicals.  Second Edition.
Perry – D. Perry. Handbook of Inorganic Compounds, 2nd Edition (May 2011)
MSDS – Chemical-specific MSDS
m – These properties are not used for any calculations in the spreadsheet, but are included to maintain consistency with other spreadsheet tools that do use these properties.
Merck – The Merck Index, 10th Edition
TOXNET – United States National Library of Medicine.  National Institutes of Health.  TOXNET Toxicology Data Network. An “r” suffix indicates that the reported boiling point is a range.  The lowest value of the range was used.
Weiss – Weiss, G.  Hazardous Chemicals Data Book, Second Edition, Noyes Data Corporation, 1986.
DECHEMA – DECHEMA Web Database, March 2003.
q – No chemical property information available for this chemical, although toxicity data are available.
r – California Environmental Protection Agency.  Consumer Products Solvents Database.  Entry for “Aromatic 150”.  2004.
s – Calculated as average of m-xylene, o-xylene, and p-xylene isomers.
v – Approximated using Tcrit = 1.5 x Tboil. Note the “c” at the end of some sources indicates that the value presented in the table is converted from the value included in the reference source.

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