EPA Superfund Site

HELENA CHEMICAL CO. (TAMPA PLANT)

FL | EPA ID FLD053502696

About this site’s exposure pathways: As of September 2023, the HELENA CHEMICAL CO. (TAMPA PLANT) Superfund site is considered “Insufficient Data to make a Human Exposure evaluation” (HEID). “EPA uses this Human Exposure status when there is insufficient data/evidence to determine whether actual or reasonably anticipated human exposures are occurring, and/or whether those exposures are above acceptable risk-based levels. The 2021 FYR included a screening for vapor intrusion. The vapor intrusion screening-level (VISL) analysis indicates a potential for the vapor intrusion pathway to exceed the industrial screening levels using the groundwater data collected from a site well along the western edge of Orient Road, between two businesses. Both businesses are enclosed structures and are located directly above the surficial aquifer BTEX plume. The buildings of concern house a recycling facility that often has bay doors open but no A/C. These screening level results indicate that additional investigation is needed to determine the if the VI exposure pathway is completed and if the levels warrant additional action. The Site team was able to gain access for the PRP to complete the first round of vapor intrusion sampling. The investigation included sampling of the outdoor air, indoor air and sub-slab air. EPA currently anticipates that there will be sufficient data to make a Human Exposure determination by 9/30/2025 because the PRP will need to take additional samples during FY24.