[PLEASE NOTE: The information presented below is offered for educational purposes only.]
Southern Solvents, Inc.
This site is not a Federal Facility.
The Southern Solvents Site, is located at 4109 Linebaugh Avenue, in a mixed commercial and residential area of North Tampa, Florida. The Site, is the former location of a facility that distributed dry cleaning solvents (i.e., perchloroethylene (PCE) and trichloroethylene (TCE)) to the local dry cleaning industry from the late 1970's to 1985, resuming operations for a brief period from 1985 to 1989. The facility is comprised of a parcel of property approximately 100 feet wide by 185 feet deep. The only structures on the property are a one story metal building and a concrete slab along the north end of the building. Reportedly, PCE and TCE were stored in above ground tanks and small tanker trucks on the concrete slab and the northern portion of the property. Soil and groundwater contamination are reportedly the result of periodic spills from these tanks.
A Remedial Investigation and Feasibility Study (RI/FS) was completed by EPA in April 1999. The findings of this investigation showed Perchloroethylene (PCE) contamination in the site surface and subsurface soils as well as ground water. The highest concentrations of PCE in the soils were detected in the saturated zone beneath the former solvent storage area. Ground water contamination was most concentrated onsite in the surficial aquifer. EPA evaluated alternatives for cleanup of the site, and presented the selected remedy in a Record of Decision (ROD) issued in September 1999. The selected remedy included excavation of contaminated, unsaturated soils located in the former solvent storage area and the treatment of highly contaminated saturated soil and surficial ground water using in situ chemical oxidation. The remedy for the unsaturated soil is being modified to soil vapor extraction (SVE), rather than excavation and disposal. Increased unsaturated soil volume is the principal reason for this modification.
Cleanup Progress: Second Remedial Investigation/Feasibility Study and Remedial Design
First Operable Unit
The remedial design for the first operable unit, which included the treatment of the contaminated subsurface soil above the water table using soil vapor extraction (SVE), was concluded in the fall of 2002. Also in the fall of 2002, EPA entered into a State Superfund Contract with FDEP for the construction operation of the SVE system and the completion of a pilot-scale in-situ chemical oxidation (ISCO) treatability study, designed to further evaluate chemical oxidation as the remedy for the more heavily contaminated soil, present below the water table. Bid documents for the SVE system were reviewed and concurred with in late 2003. Bids were solicited for the construction and operation and maintenance of the SVE system in early 2004. Construction of the SVE system is expected to start in late summer or early fall 2004.
The draft plan for the ISCO pilot study is scheduled to be available for review in March 2004.
Second Operable Unit
A second remedial investigation/feasibility study (RI/FS) to investigate groundwater contamination in the deeper Floridan aquifer was started in early 2000. Field activities associated with the second remedial investigation began in late August 2000. A third phase of Floridan aquifer monitoring well installation was concluded in the fall of 2003. Migration of groundwater contaminants in the Floridan aquifer is substantial, with a 150 foot deep Floridan aquifer well located 750 feet west of the site found to have 820 parts per billion (ppb) of PCE and 170 ppb of TCE. These data were being evaluated in March 2004.
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