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: 6 11 Background and Oil Spills (e.g., Deepwater Horizon) Mississippi River Runoff Exxon Valdez (Alaska) Natural Oil Seeps Hypoxia (“Dead Zone”) 12 Influence of Mississippi River Discharges Exxon Valdez (Alaska) Law Seminars International | Natural Resource Damages | 07/16/10 in Santa Fe, NM
Paul D. Boehm of Exponent, Inc. Speaker 20: 7 13 Definitions Background concentrations of chemicals Concentration of a chemical expected at a location absent any contribution from a purported source Chemical levels “but for” the release(s) Regulatory terminology and definitions vary Two main splits Contamination “but for” a release (anthropogenic) Levels in non-industrial areas (natural) 14 From EPA OSWER 9285.6-07P Background: Refers to constituents or locations that are not influenced by the releases from a site, and is usually described as naturally occurring or anthropogenic (U.S. EPA 1989, 1995a): Anthropogenic: Natural and human-made substances present in the environment as a result of human activities (not specifically related to the CERCLA release in question) Naturally occurring: Substances present in the environment in forms that have not been influenced by human activity 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: 7<br />
13<br />
Definitions<br />
Background concentrations of chemicals<br />
Concentration of a chemical expected at a location absent<br />
any contribution from a purported source<br />
Chemical levels “but for” the release(s)<br />
Regulatory terminology and definitions vary<br />
Two main splits<br />
Contamination “but for” a release (anthropogenic)<br />
Levels in non-industrial areas (natural)<br />
14<br />
From EPA OSWER 9285.6-07P<br />
Background: Refers to constituents or locations that are<br />
not influenced by the releases from a site, and is usually<br />
described as naturally occurring or anthropogenic<br />
(U.S. EPA 1989, 1995a):<br />
Anthropogenic: Natural and human-made substances<br />
present in the environment as a result of human activities<br />
(not specifically related to the CERCLA release in question)<br />
Naturally occurring: Substances present in the<br />
environment in forms that have not been influenced by<br />
human activity<br />
Law Seminars International | Natural Resource Damages | 07/16/10 in <strong>Santa</strong> <strong>Fe</strong>, NM
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