Drycleaner Site Profiles

Society Cleaners, Orlando, Florida

Description
Historical activity that resulted in contamination.

This is an active PCE drycleaning facility located in a shopping center. Prior to becoming eligible for the Florida Drycleaning Solvent Cleanup Program, assessment work had been conducted at the site in 1989, and 1992-95. The site is located in a retail commercial/residential setting. Another active drycleaner is located approximately 550 feet southwest (hydraulically upgradient) of the site.

Remediation Status: In groundwater monitoring


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


Contaminant Media Concentration (ppb) Nondetect
Tetrachloroethene (PCE) groundwater
Tetrachloroethene (PCE) soil

Site Hydrology

Deepest Significant Groundwater Contamination:   25ft bgs
Plume Size:   Plume Length: 480ft
Plume Width: 350ft
Plume Thickness: 10ft
Average Depth to Groundwater:   14.5ft

Lithology and Subsurface Geology

 
  fine to medium-grained sand with minor silt content
Depth: 0-25ft bgs
25ft thick
Conductivity: 8.5ft/day
Gradient: 0.005ft/ft
 
  silty clay
Depth: 25-30ft bgs
5ft thick
 
  silty, medium to coarse-grained sand with phosphate nodules and minor clay
Depth: 30-50ft bgs
20ft thick
 
  silt and weathered limestone
Depth: 50-55ft bgs
5ft thick
 
  silt and fine to medium-grained sand with phosphate nodules grading to clay
Depth: 55-75ft bgs
20ft thick

Pathways and DNAPL Presence

checkGroundwater
Sediments
checkSoil
DNAPL Present

Vapor Intrusion Pathway

Has the potential for vapor intrusion (VI) been evaluated?
  No
Has a vapor mitigation system been installed?
  Yes 
Type of Vapor Mitigation System(s):
  Soil Vapor Extraction

Remediation Scenario

Cleanup Goals:
  Soil: PCE - 30 ug/kg

Groundwater: PCE - 3 ug/l
Remedy Level:
  Full Scale Remedy

Technologies

In Situ Monitored Natural Attenuation
 

Why the technology was selected:
Monitored natural attenuation was selected as the groundwater remedy because of the low contaminant concentrations detected in groundwater and our experience that remediation of contamination in the unsaturated zone at sites with low level groundwater contamination generally results in rapid attenuation of contamination in the shallow portion of the aquifer.

Results to date:
The SVE system was shut down on October 30, 2007. Confirmatory soil sampling, performed in January 2008, showed that cleanup target levels have been met. Post-remedial groundwater monitoring has shown that contaminant concentrations are below cleanup targert levels.

Next Steps:
A Site Rehabilitation Completion Order was issued for the site on March 5, 2009.

In Situ Soil Vapor Extraction
 

Why the technology was selected:
Soil vapor extraction was selected because it is an effective technology for removing VOCs from permeable unsaturated sediments.

Date implemented:
Soil Vapor Extraction: January 31, 2007

Final remediation design:
The SVE system consists of two vertical vapor extraction wells, screened 1-13 ft bls. Both vapor extraction wells were installed beneath the floor slab of the facility. The system is powered by a 3 HP Rotron blower. Off gas is treated via a 200 lb. G.A.C. vessel. The system is designed to run at 25-45 scfm at 30-50 inches w.c. per well.

Results to date:
The SVE system was shut down on October 30, 2007. Confirmatory soil sampling, performed in January 2008, showed that cleanup target levels have been met. Post-remedial groundwater monitoring has shown that contaminant concentrations are below cleanup targert levels.

Next Steps:
A Site Rehabilitation Completion Order was issued for the site on March 5, 2009.

Cost to Design and Implement:
SVE system design: $9,900 SVE system installation & startup: $43,900

Ex Situ Carbon Adsorption
 

Date implemented:
Soil Vapor Extraction: January 31, 2007

Final remediation design:
The SVE system consists of two vertical vapor extraction wells, screened 1-13 ft bls. Both vapor extraction wells were installed beneath the floor slab of the facility. The system is powered by a 3 HP Rotron blower. Off gas is treated via a 200 lb. G.A.C. vessel. The system is designed to run at 25-45 scfm at 30-50 inches w.c. per well.

Results to date:
The SVE system was shut down on October 30, 2007. Confirmatory soil sampling, performed in January 2008, showed that cleanup target levels have been met. Post-remedial groundwater monitoring has shown that contaminant concentrations are below cleanup targert levels.

Next Steps:
A Site Rehabilitation Completion Order was issued for the site on March 5, 2009.

Cost to Design and Implement:
SVE system design: $9,900 SVE system installation & startup: $43,900

Costs

Cost for Assessment:
  $75,100
Cost for Operation and Maintenance:
  Total O&M (includes monitoring); $12,500
Total Costs for Cleanup:
  $167,900

Contacts

Karen Milicic, Project Manager
Bureau of Waste Cleanup
Florida DEP
2600 Blair Stone Road
Tallahassee, Florida 32399-2400
Phone:(850)245-8931
E-mail: Karen.Milicic@dep.state.fl.us

Mike Lodato, PG
Geosyntec Consultants
14055 Riveredge Drive, Suite 300
Tampa, Florida 33637
Phone: (813) 558-0990
E-mail: mlodato@geosyntec.com

Site Specific References

Site Assessment Report: July 2005
Remedial Action Plan: September 2005
Soil Vapor Extraction System Construction Completion Report: May 2007
Operation & Maintenance Reports: 2007
Post Active Remedial Monitoring Reports: 2008