Drycleaner Site Profiles

Spencer Custom Cleaners, Orlando, Florida

Description
Historical activity that resulted in contamination.

This is an active PCE drycleaning site that has been on operation since 1971. The facility is located in a mixed retail commercial/residential setting. Three current/former drycleaning facilities are located within 500 feet of Spencer Custom Cleaners.

Remediation Status: Site closed


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:   40ft bgs
Plume Size:   Plume Length: 115ft
Plume Width: 55ft
Plume Thickness: 27ft
Average Depth to Groundwater:   13.5ft

Lithology and Subsurface Geology

 
  fine-grained sand
Depth: 0-6ft bgs
6ft thick
Conductivity: 2ft/day
Gradient: 0.002ft/ft
 
  silty fine-grained sand
Depth: 6-25ft bgs
19ft thick
 
  fine-grained quartz sand
Depth: 25-42ft bgs
17ft thick
 
  plastic clay
Depth: 42-50ft bgs
8ft 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 Soil Vapor Extraction
 

Why the technology was selected:
Soil vapor extraction was selected because it is an effective remedial technology for removal of VOCs in permeable unsaturated sediments.

Date implemented:
September 27, 2005

Final remediation design:
The SVE system consists of one vapor extraction well constructed of 2-inch diameter Schedule 40 PVC, screened 1.5-9.5 ft bls. The vapor extraction well is installed beneath the floor slab of the boiler room. The system is powered by a 1.5 HP Rotron blower. Off gas is treated via a 200 lb. G.A.C. vessel. Design flow rate was 10-72 scfm at an applied vacuum of 30-40 inches of water. Operating flow rate was 40 cfm at an applied vacuum of 22 inches of water. Four vapor monitoring wells were installed.

Results to date:
The SVE system was shut down on March 27, 2007. Confirmatory soil samples were collected on May 1, 2007. No contaminants were detected in groundwater in concentrations exceeding an MCL after the March 24, 2006 sampling event. The final post-remedial groundwater monitoring event was conducted on April 3, 2008.

Next Steps:
A Site Rehabilitation Completion Order was issued for site closure on August 21, 2008.

Cost to Design and Implement:
$52,900

Ex Situ Carbon Adsorption
 

Date implemented:
September 27, 2005

Final remediation design:
The SVE system consists of one vapor extraction well constructed of 2-inch diameter Schedule 40 PVC, screened 1.5-9.5 ft bls. The vapor extraction well is installed beneath the floor slab of the boiler room. The system is powered by a 1.5 HP Rotron blower. Off gas is treated via a 200 lb. G.A.C. vessel. Design flow rate was 10-72 scfm at an applied vacuum of 30-40 inches of water. Operating flow rate was 40 cfm at an applied vacuum of 22 inches of water. Four vapor monitoring wells were installed.

Results to date:
The SVE system was shut down on March 27, 2007. Confirmatory soil samples were collected on May 1, 2007. No contaminants were detected in groundwater in concentrations exceeding an MCL after the March 24, 2006 sampling event. The final post-remedial groundwater monitoring event was conducted on April 3, 2008.

Next Steps:
A Site Rehabilitation Completion Order was issued for site closure on August 21, 2008.

Cost to Design and Implement:
$52,900

Costs

Cost for Assessment:
  $65,600
Cost for Operation and Maintenance:
  $52,900 (includes monitoring)
Total Costs for Cleanup:
  $159,600

Lessons Learned

Based on a 300 site data set, it appears that approximatley 28.3% of our contaminated drycleaning sites can be closed by soil remediation alone. Sites with low-level groundwater contamination can be closed by excavation/removal of contaminated soil and/or soil vapor extraction.

Contacts

Karen Milicic, Project Manager
Florida Dept. of Environmental Protection
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: 12/04
Remedial Action Plan: 2/05
Construction Completion Report: 11/05
O&M/Monitoring Reports: 2005 - 2008