Drycleaner Site Profiles

Dry Clean USA #11522, Heathrow, Florida

Description
Historical activity that resulted in contamination.

PCE drycleaning operations were conducted at this site from 1989 until 2008. The facility is located in a shopping center in a mixed residential/retail commercial setting. The identified contaminant source areas at the site were the soils beneath the facility floor slab in the vicinity of the drycleaning machine and the area outside the delivery door of the facility.

Remediation Status: In groundwater monitoring


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


Contaminant Media Concentration (ppb) Nondetect
cis-1,2-Dichloroethene groundwater
Tetrachloroethene (PCE) groundwater
Tetrachloroethene (PCE) soil
Trichloroethene (TCE) groundwater

Site Hydrology

Deepest Significant Groundwater Contamination:   60ft bgs
Plume Size:   Plume Length: 220ft
Plume Width: 220ft
Plume Thickness: 47ft
Average Depth to Groundwater:   13ft

Lithology and Subsurface Geology

 
  very fine to fine-grained sand
Depth: 0-36ft bgs
36ft thick
Conductivity: 3.1ft/day
Gradient: 0.0024ft/ft
 
  silty very fine to fine-grained sand
Depth: 36-42ft bgs
6ft thick
 
  silt with very fine-grained sand
Depth: 42-45ft bgs
3ft thick
 
  silty vert fine to fine-grained sand
Depth: 45-48ft bgs
3ft thick
 
  fine to coarse grained sand with gravel, clay and shell fragments
Depth: 48-51ft bgs
3ft thick
 
  hard pan
Depth: 49-51ft bgs
2ft thick
 
  limestone gravel and shells with fine-grained sand
Depth: 51-60ft bgs
9ft thick

Pathways and DNAPL Presence

checkGroundwater
Sediments
checkSoil
checkDNAPL 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):
  Other

Remediation Scenario

Cleanup Goals:
  Soil: PCE = 30 ug/kg (leachability)

Groundwater: PCE = 3 ug/L
Remedy Level:
  Full Scale Remedy

Technologies

In Situ Monitored Natural Attenuation
 

Results to date:
The MPE unit was shut down on September 24, 2004 after 30 months of operation. Since that time the system has been in post-active remedial monitoring. For a groundwater monitoring event conducted on March 15, 2011, only one well produced a groundwater sample with a contaminant concentration exceeding an MCL: 3.7 ug/L PCE

Next Steps:
Continue groundwater monitoring.

Cost to Design and Implement:
$225,500 (all technologies)

In Situ Multi Phase Extraction
 

Date implemented:
March 26, 2002

Final remediation design:
The multi-phase extraction system consists of one recovery well screened 3-30 ft BLS. Groundwater recovery is via a pneumatic pump powered by a 7.5 HP continuous rotary screw compressor. Design flow rate is 27 scfm at 125 psi. The vacuum blower for the SVE system is a 10 HP blower. Design flow rate is 75 scfm @ 10 inches of mercury. Recovered water is treated via two 200-lb. liquid phae G.A.C. units. Off gas is treated via two (2) vapor phase G.A.C. units.

Results to date:
The MPE unit was shut down on September 24, 2004 after 30 months of operation. Since that time the system has been in post-active remedial monitoring. For a groundwater monitoring event conducted on March 15, 2011, only one well produced a groundwater sample with a contaminant concentration exceeding an MCL: 3.7 ug/L PCE

Next Steps:
Continue groundwater monitoring.

Cost to Design and Implement:
$225,500 (all technologies)

Ex Situ Carbon Adsorption
 

Date implemented:
March 26, 2002

Final remediation design:
The multi-phase extraction system consists of one recovery well screened 3-30 ft BLS. Groundwater recovery is via a pneumatic pump powered by a 7.5 HP continuous rotary screw compressor. Design flow rate is 27 scfm at 125 psi. The vacuum blower for the SVE system is a 10 HP blower. Design flow rate is 75 scfm @ 10 inches of mercury. Recovered water is treated via two 200-lb. liquid phae G.A.C. units. Off gas is treated via two (2) vapor phase G.A.C. units.

Results to date:
The MPE unit was shut down on September 24, 2004 after 30 months of operation. Since that time the system has been in post-active remedial monitoring. For a groundwater monitoring event conducted on March 15, 2011, only one well produced a groundwater sample with a contaminant concentration exceeding an MCL: 3.7 ug/L PCE

Next Steps:
Continue groundwater monitoring.

Cost to Design and Implement:
$225,500 (all technologies)

Costs

Cost for Assessment:
  $93,600
Cost for Operation and Maintenance:
  Total O&M + monitoring 145,800
Total Costs for Cleanup:
 

Lessons Learned

The building configuration limited the location of the MPE well.

Contacts

Chris Pellegrino, Project Manager
Bureau of Waste Cleanup
Florida Department of Environmental Protection (MS4520)
2600 Blair Stone Road
Tallahassee, Florida 32301-2400

Phone: (850) 245-8972
E-mail: Chris.Pellegrino@dep.state.fl.us

Site Specific References

Site Assessment Plan: 1999
Remedial Action Plan: 2001
Operation & Maintenance Reports: 2002 - 2004
Monitoring Reports: 2004 - present