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LSI 2010 NRD Santa Fe final conference binder 072110.pdf

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Paul D. Boehm of Exponent, Inc. Speaker 20: 11<br />

State Guidance for Background Soils—<br />

Examples<br />

State<br />

How Determined<br />

Outside Literature<br />

Ranges Considered<br />

Minimum Number<br />

of Samples<br />

Compositing<br />

Allowed<br />

Alabama Site-specific Yes (site-specific) 4 Sometimes<br />

Arkansas<br />

Site-specific or<br />

literature<br />

No 4 Yes<br />

California Site-specific Yes Preferably 10 No<br />

Florida Site-specific Possibly 7 or site-specific No<br />

Georgia Site-specific Yes 1 Site-specific<br />

Massachusetts<br />

New Jersey<br />

Wisconsin<br />

Site-specific<br />

preferred<br />

Site-specific<br />

minimum and<br />

literature<br />

Site-specific or<br />

literature<br />

Yes (with site-specific) Depends No<br />

Site-specific minimum<br />

and literature<br />

Yes 4<br />

10 No<br />

Contaminantspecific<br />

21<br />

22<br />

The Legacy Urban Site Conundrum<br />

What is background? Upstream? Preindustrial?<br />

Other chemicals?<br />

Multiple sources<br />

Multiple chemicals<br />

Many and/or continuous releases over time<br />

Confounding background<br />

Law Seminars International | Natural Resource Damages | 07/16/10 in <strong>Santa</strong> <strong>Fe</strong>, NM

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