LSI 2010 NRD Santa Fe final conference binder 072110.pdf
LSI 2010 NRD Santa Fe final conference binder 072110.pdf LSI 2010 NRD Santa Fe final conference binder 072110.pdf
Paul D. Boehm of Exponent, Inc. Speaker 20: 8 15 From NJ DEP (Fields et al. 1993) A split of “anthropogenic” Soil "background" may be viewed as a continuum of values in which a concentration gradient of anthropogenic pollution is superimposed onto the preexisting distribution of concentrations found in nature This concentration gradient ranges from diffuse anthropogenic pollution (DAP), to local, identifiable point sources (IPS) Both DAP and IPS are fair game in defining background (according to Boehm) 16 Approaches for Determining Background Literature values Reference-area concentrations— Data from "unaffected” area Upgradient or upwind concentration Historical reconstruction geochronology Chemical fingerprinting Bulk sediment? Bioavailable fraction through Law Seminars International | Natural Resource Damages | 07/16/10 in Santa Fe, NM
Paul D. Boehm of Exponent, Inc. Speaker 20: 9 17 Sources of Information: Literature ATSDR ToxProfiles >300 substances Literature review of levels found in environmental media Air Water Soil/sediment 18 Sources of Information: Literature (continued) National databases USGS Arsenic Concentrations Law Seminars International | Natural Resource Damages | 07/16/10 in Santa Fe, NM
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Paul D. Boehm of Exponent, Inc. Speaker 20: 9<br />
17<br />
Sources of Information: Literature<br />
ATSDR ToxProfiles<br />
>300 substances<br />
Literature review<br />
of levels found<br />
in environmental<br />
media<br />
Air<br />
Water<br />
Soil/sediment<br />
18<br />
Sources of Information: Literature (continued)<br />
National databases<br />
USGS<br />
Arsenic Concentrations<br />
Law Seminars International | Natural Resource Damages | 07/16/10 in <strong>Santa</strong> <strong>Fe</strong>, NM