Soil contaminant and exposure point concentration computation using Voronoi tessellation weighted averaging
- Camp Dresser & McKee Inc., Cambridge, MA (United States)
- Camp Dresser & McKee Inc., Denver, CO (United States)
Estimating average soil contaminant concentrations is a routine site investigation, risk assessment and remediation verification activity. Some techniques however fail to adequately consider the spatial distribution of contaminants and may result in erroneous estimates. Kriging may provides the best linear unbiased estimator of soil contaminant levels for sites when concentrations are spatially correlated. When variogram models show limited relationships, or when sampling density is limited, the application of geostatistical techniques may, not be appropriate. In these situations the geographic distribution of contaminants is often discounted when developing estimates of soil contaminant concentrations. In this poster presentation we describe the use of a Voronoi tessellation weighted averaging approach for estimating soil lead and polyaromatic hydrocarbons (PAHs) that in turn were used in performing risk assessment computations. The exposure point concentrations estimated using this approach provided a more realistic assessment of the risks actually posed by soil contaminants at this site.
- OSTI ID:
- 569914
- Report Number(s):
- CONF-971116--
- Country of Publication:
- United States
- Language:
- English
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