Applicability of Surface Wipe Sampling Results for Risk Assessment of Indoor Child Exposures. M. Clauberg and R. W. Severson, EnSafe, Raleigh, NC
Surface wipe sampling is performed for the detection of transferable contamination residues. The primary detection targets are indoor dust-borne contaminants, e.g. pesticide residues and machining dusts. Methods for the sampling and analysis of surface wipes are established and can reasonably reflect the total amount of transferable contaminants available per unit area sampled. Selection of physical location of sampling area and indoor air circulation can affect the transferable mass. Results of surface wipe samples can be used for the determination of risks from direct contact pathways, i.e. dermal contact of surfaces with exposed skin, and skin-to-mouth incidental ingestion. Surface wipes can also be useful for indirect determination of indoor air quality, especially if sampled repeatedly over time after a release event. Uncertainties in the sampling location selection, contact frequencies, exposed skin areas, dermal adsorption and translocation factors for dust-borne contaminants, and incidental ingestion rates require close scrutiny. A child exposure model was employed to develop an approach to estimate upper-bound risks from residues of dust-borne contamination.
Views reflect those of the authors and not necessarily those of EnSafe Inc. or its clients/sponsors.
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