Jj Seifert Machine

⚠ Superfund · Construction complete

The first Five-Year Review was published by EPA HQ in 2020. Currently, a long-term ground-water monitoring program is underway to evaluate the effectiveness of the biological treatment of the VOC ground-water contamination.

Location

CityRuskin
CountyHillsborough County
StateFlorida
Coordinates27.67861, -82.47778

Contaminants of concern

Contaminated media

Cleanup timeline

  1. Initial Assessment Completed — 06/20/2008
  2. Proposed to the National Priorities List — 09/23/2009
  3. Finalized on the National Priorities List — 03/04/2010
  4. Remedial Investigation Started — 01/24/2011
  5. Final Remedy Selected — 09/26/2013
  6. Final Remedial Action Started — 09/29/2014
  7. Construction Completed — 06/14/2016
  8. Deleted from National Priorities List — Not Yet Achieved
  9. Most Recent Five-Year Review — 01/17/2025
  10. Achieved Sitewide Ready for Anticipated Reuse — Not Yet Achieved

EPA references

Other Superfund sites in Hillsborough County

EPA-regulated facilities nearby

Understanding this Superfund site

Jj Seifert Machine is a federal Superfund site in Florida. The Superfund program, created by Congress in 1980, addresses sites where hazardous substances have been released or threaten release into the environment. EPA scores potential sites using the Hazard Ranking System; those that score high enough are placed on the National Priorities List.

Current status: Construction complete. Physical construction of the cleanup remedy is complete, though long-term monitoring and institutional controls typically continue for years or decades. Groundwater treatment systems, for example, often run long after surface cleanup finishes.

EPA has identified 8 contaminants of concern at this site, including 1,1-dichloroethene, barium, chloroethene (vinyl chloride). Contamination has been detected in groundwater, soil.

If you live near this site and have health concerns, your state health department can provide site-specific guidance. EPA maintains a community involvement program for most NPL sites, and site documents — including the Record of Decision, five-year reviews, and public health assessments — are typically available through EPA's Superfund site profile.