Drycleaner Site Profiles

House of Lorraine Valet Services, Hallandale, Florida

Description
Historical activity that resulted in contamination.

This is an active PCE drycleaning facility that has been operating since 1959. Identified contaminant source areas are the former and current location of the drycleaning machine and the area outside the boiler room door. The facility is located on a small lot (< 0.3 acre) in a mixed retail commercial/residential setting. There are active gasoline stations located north and south of the facility, and a gasoline station was formerly located due east of the facility. Petroleum contaminants are present in groundwater in the site area.

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 10,103 ppb
cis-1,2-Dichloroethene soil 5,580 ppb
1,1-Dichloroethene groundwater 15.5 ppb
Tetrachloroethene (PCE) groundwater 10,090 ppb
Tetrachloroethene (PCE) soil 2,872 ppb
Trichloroethene (TCE) groundwater 450 ppb
Trichloroethene (TCE) soil 1,020 ppb
trans-1,2-Dichloroethene groundwater 28 ppb
Vinyl Chloride groundwater 3,640 ppb
Vinyl Chloride soil 523 ppb

Site Hydrology

Deepest Significant Groundwater Contamination:   50ft bgs
Plume Size:   Plume Length: 700ft
Plume Width: 120ft
Plume Thickness: 45ft
Average Depth to Groundwater:   5.02ft

Lithology and Subsurface Geology

 
  Fine-grained sand
Depth: 0-10ft bgs
10ft thick
Conductivity: 83ft/day
Gradient: 0.0003ft/ft
 
  Silty, fine-grained sand with limestone pebbles
Depth: 10-25ft bgs
15ft thick
 
  Limestone
Depth: 25-32ft bgs
7ft thick
 
  Fine-grained sand
Depth: 32-38ft bgs
6ft thick
 
  Fossiliferous limestone, some clay and fine-grained sand interbeds
Depth: 38-75ft bgs
37ft 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):
  Soil Vapor Extraction

Remediation Scenario

Cleanup Goals:
  Groundwater: PCE = 3.0 µg/L, TCE = 3.0 µg/L; cis 1,2-DCE = 70 µg/L; trans 1,2-DCE = 100 µg/L; 1,1-DCE = 7.0 µg/L, vinyl chloride = 1.0 µg/L

Soil: PCE = 30 µg/kg; TCE = 30 µg/kg; cis 1,2-DCE= 400 µg/kg; vinyl chloride = 7.0 µg/kg
Remedy Level:
  Full Scale Remedy

Technologies

In Situ Soil Vapor Extraction
 

Why the technology was selected:
SVE was chosen because it is an effective technology for removing VOCs from permeable, unsaturated sediments.

Date implemented:
August 6, 2003

Final remediation design:
SVE System: Two lateral SVE wells, 7 ft and 10 ft in length, were constructed of 4-inch diameter, Schedule 40 PVC with 0.010-inch slot screen. 7.5-HP Rotron blower. Design flow rate: 128 scfm. Off gas treatment: two 180-lb vapor phase carbon vessels.

Results to date:
In October 2007, the SVE system was shut down. As of March 2008, the pump-and-treat system had recovered an estimated 223 lbs of VOCs. The system has pumped and treated 17,964,235 gallons of water with an average pumping rate of 12.2 gpm. The system has achieved capture of the contaminant source area. Contaminant concentrations in groundwater samples collected from offsite monitoring wells are less than 10 µg/L. Recovery well influent concentrations have dropped from 12,377 µg/L total VOCs in July 2003 to 145.2 µg/L total VOCs in March 2008. The SVE system has recovered an estimated 15.2 lbs of VOCs, operating at an average influent flow rate of 151 scfm and an average vacuum of 43 inches w.c. The estimated radius of influence of the SVE system is 15 feet.

Next Steps:
An active soil gas survey was run in June 2008. soil gas samples collected under the floor slab had PCE concentrations as high as 4.5 mg/cubic meter. There is a proposal to install vapor recovery wells under the facility floor slab.

Cost to Design and Implement:
$246,100 for all technologies

Ex Situ Air Stripping
 

Date implemented:
August 6, 2003

Final remediation design:
Pump-and-Treat: One 5-inch diameter Schedule 40, PVC recovery well, screened 4.5-38 feet bgs with 0.020-inch slot screen. One-half-HP Gundfos submersible pump. Design pumping rate; 5-15 gpm. Produced water treated in a low-profile air stripper and then routed to a 1000-lb liquid-phase G.A.C. vessel for additional treatment. Treated water is disposed in an exfiltration gallery.

Results to date:
In October 2007, the SVE system was shut down. As of March 2008, the pump-and-treat system had recovered an estimated 223 lbs of VOCs. The system has pumped and treated 17,964,235 gallons of water with an average pumping rate of 12.2 gpm. The system has achieved capture of the contaminant source area. Contaminant concentrations in groundwater samples collected from offsite monitoring wells are less than 10 µg/L. Recovery well influent concentrations have dropped from 12,377 µg/L total VOCs in July 2003 to 145.2 µg/L total VOCs in March 2008. The SVE system has recovered an estimated 15.2 lbs of VOCs, operating at an average influent flow rate of 151 scfm and an average vacuum of 43 inches w.c. The estimated radius of influence of the SVE system is 15 feet.

Next Steps:
An active soil gas survey was run in June 2008. soil gas samples collected under the floor slab had PCE concentrations as high as 4.5 mg/cubic meter. There is a proposal to install vapor recovery wells under the facility floor slab.

Cost to Design and Implement:
$246,100 for all technologies

Ex Situ Carbon Adsorption
 

Date implemented:
August 6, 2003

Final remediation design:
Pump-and-Treat: One 5-inch diameter Schedule 40, PVC recovery well, screened 4.5-38 feet bgs with 0.020-inch slot screen. One-half-HP Gundfos submersible pump. Design pumping rate; 5-15 gpm. Produced water treated in a low-profile air stripper and then routed to a 1000-lb liquid-phase G.A.C. vessel for additional treatment. Treated water is disposed in an exfiltration gallery. SVE System: Two lateral SVE wells, 7 ft and 10 ft in length, were constructed of 4-inch diameter, Schedule 40 PVC with 0.010-inch slot screen. 7.5-HP Rotron blower. Design flow rate: 128 scfm. Off gas treatment: two 180-lb vapor phase carbon vessels.

Results to date:
In October 2007, the SVE system was shut down. As of March 2008, the pump-and-treat system had recovered an estimated 223 lbs of VOCs. The system has pumped and treated 17,964,235 gallons of water with an average pumping rate of 12.2 gpm. The system has achieved capture of the contaminant source area. Contaminant concentrations in groundwater samples collected from offsite monitoring wells are less than 10 µg/L. Recovery well influent concentrations have dropped from 12,377 µg/L total VOCs in July 2003 to 145.2 µg/L total VOCs in March 2008. The SVE system has recovered an estimated 15.2 lbs of VOCs, operating at an average influent flow rate of 151 scfm and an average vacuum of 43 inches w.c. The estimated radius of influence of the SVE system is 15 feet.

Next Steps:
An active soil gas survey was run in June 2008. soil gas samples collected under the floor slab had PCE concentrations as high as 4.5 mg/cubic meter. There is a proposal to install vapor recovery wells under the facility floor slab.

Cost to Design and Implement:
$246,100 for all technologies

Ex Situ Pump and Treat
 

Why the technology was selected:
Pump-and-treat was selected to hydraulically contain the contaminant plume, remove contaminant mass, and draw down the water table to enhance the recovery of the SVE system.

Date implemented:
August 6, 2003

Final remediation design:
Pump-and-Treat: One 5-inch diameter Schedule 40, PVC recovery well, screened 4.5-38 feet bgs with 0.020-inch slot screen. One-half-HP Gundfos submersible pump. Design pumping rate; 5-15 gpm. Produced water treated in a low-profile air stripper and then routed to a 1000-lb liquid-phase G.A.C. vessel for additional treatment. Treated water is disposed in an exfiltration gallery.

Results to date:
In October 2007, the SVE system was shut down. As of March 2008, the pump-and-treat system had recovered an estimated 223 lbs of VOCs. The system has pumped and treated 17,964,235 gallons of water with an average pumping rate of 12.2 gpm. The system has achieved capture of the contaminant source area. Contaminant concentrations in groundwater samples collected from offsite monitoring wells are less than 10 µg/L. Recovery well influent concentrations have dropped from 12,377 µg/L total VOCs in July 2003 to 145.2 µg/L total VOCs in March 2008. The SVE system has recovered an estimated 15.2 lbs of VOCs, operating at an average influent flow rate of 151 scfm and an average vacuum of 43 inches w.c. The estimated radius of influence of the SVE system is 15 feet.

Next Steps:
An active soil gas survey was run in June 2008. soil gas samples collected under the floor slab had PCE concentrations as high as 4.5 mg/cubic meter. There is a proposal to install vapor recovery wells under the facility floor slab.

Cost to Design and Implement:
$246,100 for all technologies

Costs

Cost for Assessment:
  $138,900
Cost for Operation and Maintenance:
 
Total Costs for Cleanup:
 

Contacts

Nancy Murchison, Project Manager
Bureau of Waste Cleanup (MS4520)
Florida Department of Environmental Protection
2600 Blair Stone Road
Tallahassee, Florida 32399-2400
Phone: (850) 245-8968
E-mail: Nancy.Murchison@DEP.state.fl.us

Donald Lewis, P.E.
Shaw Environmental, Inc.
725 U.S. Highway 301 South
Tampa, Florida 33619-4349
Phone: (813) 612-3681

Site Specific References

Site Assessment Report: 2000
Remedial Action Plan: 2002
Construction Completion Report: 2003
O&M/Monitoring Reports: 2003 - 2008
Modified Active Soil Gas Sampling Report: July 2008.