EPA Superfund site
10TH STREET SITE
Exposure status: insufficient data
Data limitations: Proximity to a Superfund site boundary does not mean your property is contaminated. EPA site boundaries show the area designated for cleanup, not the full extent of contamination. Groundwater plumes can extend beyond site boundaries. This tool shows publicly available EPA federal data. It is not affiliated with or endorsed by EPA, and is not a substitute for a professional environmental assessment.
About this site's exposure pathways
As of July 2025, the 10th Street Superfund site is considered “Insufficient Data to make a Human Exposure evaluation” (HEID). The site was previously categorized as HEUC. The sixth five-year review completed in 2025 identified the need to investigate the vapor intrusion pathway near the OHM source area and another area farther downgradient, where shallow groundwater contains site contaminants of concern above vapor intrusion screening levels. EPA will collect indoor air and sub-slab samples at residential properties of interest for four quarters to evaluate whether indoor air exposures are occurring or may be reasonably anticipated. EPA currently anticipates that there will be sufficient data to make a human exposure determination by December 2027 because results from the four-quarters of sampling data will have been received and evaluated by then.