Remedial Investigation and Risk Assessment, Industrial Site
SLR is managing a remedial investigation, source control evaluation, and risk assessment for an 85-acre industrial facility adjacent to the Columbia Slough in Portland, Oregon. The site is in the Oregon Department of Environmental Quality (DEQ) Voluntary Cleanup Program. An Incremental Sampling Methodology (ISM) was used to characterize impacts to sediment in wetlands at the site. ISM is a technique designed to statistically reduce or limit variability associated with discrete sampling, providing unbiased, representative and reproducible estimates of the mean concentration of analytes in a specific area of interest. SLR is conducting groundwater and stormwater investigations to determine if site-related chemicals may migrate to the Columbia Slough. Chemicals of potential concern include metals, dioxins furans, polycyclic aromatic hydrocarbons (PAHs), and PCBs.