455 Hardman Avenue site

455-Hardman-Ave-530

The Minnesota Pollution Control Agency (MPCA) staff from the Voluntary Investigation and Cleanup (VIC) and Petroleum Brownfields (PB) programs provided technical oversight of the remedial investigation and cleanup of a portion of the former Van Hoven/Armour Rendering Site

History

This site has been developed since the late 1800s when it and the surrounding area were used for stockyards and railroads. Swift & Company already had a meat-processing facility in this area by the early 1900s, and in 1919 Armour & Company opened a facility that employed over 4,000 people.

The site was primarily used for parking and railroad storage for the meat-processing companies.

Environmental issues

  • Site soil was contaminated with petroleum, arsenic and polycyclic aromatic hydrocarbons (PAHs) and contained debris consisting of bricks, glass, steel, slag, sawdust, and concrete. The contaminants posed a risk to human health and the environment and therefore were required to be removed.
  • Site groundwater was contaminated with petroleum, arsenic, lead and PAHs. The groundwater contamination was not significant and remediation was not required.
  • Site vapors were contaminated with methane. The source of the methane is likely former dumping areas nearby.

The cleanup process

  • All on-site buildings were demolished and the demolition debris was removed from the site.
  • Approximately 20,600 tons (about 750 truckloads) of contaminated soil and debris were excavated and disposed in a permitted landfill.

Ready for redevelopment

  • A stormwater retention pond was installed on the eastern portion of the site to accommodate future redevelopment of the site.
  • Future buildings will require a methane mitigation system if soil gas sampling shows there are still elevated methane gas levels in the subsurface.

Environmental and economic benefits

  • Soil contamination has been removed, eliminating the impacted soil exposure pathway.
  • Source area impacted soil was removed and will no longer be a source for continuing groundwater contamination.
  • The site is currently ready for industrial redevelopment and will provide a new tax base and new jobs after it has been redeveloped.

Assurances received

January 11, 2012: Petroleum Tank Release Site File Closure.
July 26, 2012: No Further Action Determination for Soil.

Institutional controls

June 25. 2012: Affidavit Concerning Real Property Contaminated with Hazardous Substances. This serves as a notification that there is methane in the soil gas.

Project partners

  • MPCA VIC Program staff John Betcher and Shanna Schmitt and PB Program staff Mark Koplitz and Bassou Ouglout.
  • The South St. Paul Housing and Redevelopment Authority manager was Chet DeSchane.
  • The environmental consultant was Sherry Van Duyn of Landmark Environmental, LLC.
  • Public funding sources included a Targeted Brownfields Assessment grant from the U.S. Environmental Protection Agency, a cleanup grant from the Minnesota Department of Employment and Economic Development, and the South St. Paul Housing and Redevelopment Authority.