EPA Superfund Site

L.A. CLARKE & SON

VA | EPA ID VAD007972482

About this site’s exposure pathways: There is not sufficient information available to determine the Site-wide Human Exposure Control status at the L. A. Clarke and Son Superfund Site, a former wood treating plant. The surface soil at the upland portion of the site meets the clean-up level for carcinogenic polynuclear aromatics (cPNAs) EPA expects to adopt in a future decision document. The sediments in the flood plain of Massaponax Creek were previously excavated and disposed of off-site. However, EPA cannot be assured that the sediments have not become re-contaminated because neither the subsurface soil nor the ground water in the upland area were remediated. Although a fence was constructed, it cannot completely encircle the site because there is an active railroad siding traversing the site, As such, trespassers could be exposed to unacceptable levels of cPNAs. The activities planned to make the Human Exposure Control determination include: re-sampling of the flood plain sediments in the Spring of 2012, and implementing any necessary remedial actions after the Decision Document is finalized. The results of the investigations will enable EPA to make a Human Exposure determination for the site and to ensure that appropriate actions are taken to control exposures, if necessary.