Drycleaner Site Profiles

Former Country Club Cleaners, Boca Raton, Florida

Description
Historical activity that resulted in contamination.

Drycleaning using PCE was performed at this site from January 1988 until March 1995. The facility is currently part of a storage area for a drug store. The contaminant source area is the soil beneath the building floor slab at the former location of the drycleaning machine. A drainage canal is located approximately 100 ft east of the site. The nearest water supply well is located approximately 2,200 ft east of the site.

Contaminants
Contaminants present and the highest amount detected in both soil and groundwater.


Contaminant Media Concentration (ppb) Nondetect
cis-1,2-Dichloroethene groundwater 3,080 ppb
1,1-Dichloroethene groundwater 7.1 ppb
Tetrachloroethene (PCE) groundwater 860 ppb
Tetrachloroethene (PCE) soil 49 ppb
Trichloroethene (TCE) groundwater 806 ppb
trans-1,2-Dichloroethene groundwater 21.9 ppb

Site Hydrology

Deepest Significant Groundwater Contamination:   30ft bgs
Plume Size:  
Average Depth to Groundwater:   6.3ft

Lithology and Subsurface Geology

 
  fine to medium-grained sand
Depth: 0-50ft bgs
50ft thick
Conductivity: 190ft/day
Gradient: 0.002ft/ft

Pathways and DNAPL Presence

checkGroundwater
Sediments
checkSoil
DNAPL Present

Remediation Scenario

Cleanup Goals:
  Groundwater (MCLs): PCE = 3 µg/l; TCE = 3 µg/l; cis 1,2-DCE = 70 µg/l; trans 1,2-DCE = 100 µg/l; 1,1-DCE = 7 µg/l

Soils (Cleanup Target Level for leachability): PCE = 30 µg/kg

Technologies

In Situ Monitored Natural Attenuation
 

Why the technology was selected:
Monitored natural attenuation was selected as the groundwater remedy, because reductive dehclorination was actively occuring in groundwater at the site.

Date implemented:
2000-2003 (Groundwater monitoring)

Cost to Design and Implement:
Soil excavation, soil disposal and restoration of floor slab: $21,300 Groundwater Monitoring: $27,450 Site Restoration: $4000

Ex Situ Soil Removal
 

Why the technology was selected:
Removal was selected for soils, because contaminated soils were accessible and the Synthetic Precipitation Leaching Proceedure leachate derived from source area soil samples had PCE concentrations that exceeded MCLs.

Date implemented:
July 15-16, 2003 (soil excavation)

Final remediation design:
The remedial plan was to cut out a portion of the facility floor slab and remove contaminated soil using a vacuuum truck.

Results to date:
A 5-x-5-ft section of the floor slab was removed at the former location of the drycleaning machine. Utilizing a vacuum truck, approximately 5 cubic yards of soil was removed to a depth of approximately 7 ft beneath the floor slab. The excavation was backfilled, and then the concrete floor slab was restored. This site has met the No Further Action criteria and a Site Rehabilitation Completion Order was issued on September 2, 2003.

Cost to Design and Implement:
Soil excavation, soil disposal and restoration of floor slab: $21,300 Groundwater Monitoring: $27,450 Site Restoration: $4000

Costs

Cost for Assessment:
  $97,000
Cost for Operation and Maintenance:
 
Total Costs for Cleanup:
  $149,750

Lessons Learned

1. A vacuum truck is a viable method for limited excavation of contaminated soil under a building floor slab in areas where shallow water tables exist. Soil removal can be done in a relatively short amount of time with a minimum disruption to business activities, which is an important consideration when conducting remedial work at operating businesses.

Contacts

Theresa Pepe, Project Manager
Florida Department of Environmental Protection
Bureau of Waste Cleanup
2600 Blair Stone Road
Tallahassee, Florida 32399-2400
(850) 245-8966
Theresa.Pepe@dep.state.fl.us

Contractor:
William Vogelsong, PG
ARCADIS G&M, Inc.
2081 Vista Parkway
West Palm Beach, Florida 33411
(561) 697-7000

Site Specific References

1. Site Assessment Report, April 1999
2. Groundwater Monitoring Reports
3. Source Removal Letter Report, July, 2003