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Stauffer Chemical Company (Tampa)

Stauffer Chemical Company (Tampa)
EPA ID: FLD004092532
Location:Tampa, Hillsborough County, FL
Congressional District: 11
NPL Status: Proposed: 06/17/96; Final 12/23/96
Project Manager
Site Repository:
Reference Department Head
4202 East Fowler Ave.
Tampa, FL 33620
Documents:About Adobe Portable Document Format

Site Background:
The Stauffer Chemical Company Site is located in Tampa, Hillsborough County, Florida. The Site is an inactive pesticide manufacturer/distribution facility which encompasses approximately 40 acres of land in an industrialized area of Tampa. The Site was used to formulate agricultural chemical products (organochlorine and organophosphorus pesticides) from 1951 until 1986 and is now inactive. Disposal practices at the Site included the burial of containerized wastes, off-specification pesticides, and packaging materials. Site investigations revealed the presence of pesticides in onsite soil, surface water and sediment in onsite ponds, and in groundwater underlying the Site. A geophysical survey completed during the investigation concluded buried metal was present.

Cleanup Progress:
A removal of buried drums and debris, and 3450 cubic yards (CY) of highly contaminated soils was completed in 1993. The soils were temporarily stored on site and later treated by Low Temperature Thermal Desorption (LTTD) which was completed on November 22, 1994. EPA issued a Record of Decision (ROD) in December 1995 outlining the selected remedy and contingency remedy for the Site. Stauffer Chemical is the PRP and they are performing the cleanup design under an Administrative Order on Consent (AOC). A Consent Decree for Stauffer to continue the full remedial action (RA) activities has been approved.

The selected remedy addresses soil, sediment, and groundwater contamination at the Site and includes ex-situ anaerobic treatment (i.e., bioremediation) of pesticide contaminated surface soils and sediments to levels appropriate for future industrial use of the Site. In addition, the selected remedy includes groundwater recovery and treatment with activated carbon to remove pesticides.

The remedial action began in May 1999. It was initially believed that the total quantity of contaminated soils requiring treatment was about 16,000 cubic yards, and an additional 2,500 cubic yards of pond sediments. The soils were treated with XenoremTM. Batch 1 performed well. However, this batch took nearly a year of total cycle time. Batch 2 did not perform as well as Batch 1. Batch 3 was disappointing, missing remedial goals for chlordane, DDT, dieldrin and toxaphene. As with Batch 1, Batches 2 and 3 each took a full year of cycle time.  In recognition that the selected remedy did not work with the site contaminants, Stauffer Chemical is developed a modification proposal for the remedial approach to the soil cleanup at the Site.  The groundwater component of the remedy, Pump and Treat, still is operational and functional.

In August 2006 EPA issued an Amended ROD for the soils cleanup component of the Site.  The remedy consists of implementing the following actions:  construction of the containment cell; removal of contaminated surface soils (0-2 feet) above remedial goals (RGs) and placement in the containment cell; removal of one foot of contaminated pond sediments above RGs and placement in the containment cell; removal of DNAPL contaminated subsurface soils and placement in the containment cell; installation of a 2-foot thick pervious soil cap and the impervious geosynthetic cap over surface soil for those areas with identified subsurface soil contamination above RGs, in addition to the containment cell; placement of 1-foot thick layer of clean fill in the north and south ponds to reduce  ecological risk; and Institutional Controls.

Construction of the new soils remedy was done between October 2006 and June 2007.  A Draft Construction Completion Report was drafted by Stauffer Management in December 2007.  Institutional Controls, in the form of deed restrictions, are been put in place through an agreement between the Florida Department of Environmental Protection (FDEP) and Stauffer Management.  Once the deed restrictions are in place the Construction Completion Report will be completed.    

PRP representatives prepared and submitted to FDEP the draft Restrictive Covenant language to establish the Institutional Controls in January 09.  PRPs and EPA are waiting for FDEP’s approval to finalize the Remedial Action Construction Completion Report.

     

For information about the contents of this page please contact Brenda Lane

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