Drycleaner Site Profiles

F&M Cleaners & Coin Laundry , Orlando, Florida

Description
Historical activity that resulted in contamination.

PCE drycleaning operations were conducted at this site from August 1984 until July 1992. The drycleaning operation was housed in the bay of a shopping center located in a mixed retail commercial/residential setting. the contaminant source area is the soil beneath the floor slab in the vicinity of the drycleaning machine.

Remediation Status: In active remediation


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


Contaminant Media Concentration (ppb) Nondetect
Benzene groundwater 10.2 ppb
cis-1,2-Dichloroethene groundwater 65.4 ppb
Tetrachloroethene (PCE) groundwater 1,030 ppb
Tetrachloroethene (PCE) soil 313 ppb
Trichloroethene (TCE) groundwater 36.7 ppb
trans-1,2-Dichloroethene groundwater 4.1 ppb

Site Hydrology

Deepest Significant Groundwater Contamination:   17ft bgs
Plume Size:   Plume Length: 280ft
Plume Width: 90ft
Plume Thickness: 12ft
Average Depth to Groundwater:   5.31ft

Lithology and Subsurface Geology

 
  fine-grained sand with some organic material
Depth: 0-3ft bgs
3ft thick
Conductivity: 5.99ft/day
Gradient: 0.001ft/ft
 
  fine to medium-grained sand
Depth: 3-24ft bgs
21ft thick
 
  sandy clay
Depth: 24-24.5ft bgs
0.5ft thick
 
  fine to medium grained sand
Depth: 24.5-35.5ft bgs
11ft thick
 
  sandy clay
Depth: 35.5-37ft bgs
1.5ft thick
 
  fine-grained phosphatic sand
Depth: 37-51ft bgs
14ft thick
 
  phosphatic clay
Depth: 51-53ft bgs
2ft thick
 
  sandy, phosphatic limestone
Depth: 53-57.5ft bgs
4.5ft thick
 
  fine to medium-grained phosphatic sand
Depth: 57.5-69.5ft bgs
12ft thick
 
  interbedded phosphatic limestone, sandy silt and phosphatic clay
Depth: 69.5-90ft bgs
20.5ft thick
 
  plastic to sandy clay
Depth: 90-96ft bgs
6ft 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; TCE = 3 ug/l; Cis 1,2-DCE = 70 ug/l; trans 1,2-DCE = 100 ug/l; 1,1-DCE = 7 ug/l, benzene = 1 ug/l
Remedy Level:
  Full Scale Remedy

Technologies

In Situ Bioremediation
 

Why the technology was selected:
Bioremediation, using potassium lactate as an amendment, was selected because anaerobic conditions exist in the aquifer and reductive dechlorination is an active process. PCE daughter products were present in groundwater. Bioremediation was used to polish low levels of VOCs in the shallow groundwater after the SVE system was decommissioned.

Date implemented:
First potassium lactate injection event: April 12, 2007. Second potassium lactate injection event: March 13-18, 2008.

Results to date:
SVE system was shut down in December 2006. The first potassium lactate injection event was conducted on April 12, 2007: Twenty gallons of 60% potassium lactate solution was mixed with 2,000 gallons of water and injected into each of the two SVE lateral vapor recovery wells at approximatley 3 gpm. The second potassium lactate injection event was conducted form March 13-18, 2008. A total of 100 gallons of 60% potasssium lactate solution was mixed with 5,500 gallons of water and injected into the two SVE lateral vapor extraction wells at approximatley 10 gpm. Groundwater monitoring conducted on February 11, 2008, prior to the second injection event found detectable concentrations of contaminants (20.8 ug/l PCE, 2.49 ug/l TCE, & 2.96 ug/l Cis 1,2-DCE) in only one monitor well. That well is installed beneath the facility floor slab in the contaminant source area. Groundwater monitoring was conducted in September 2008 and found the following in the source area monitor well: 12.6 ug/l PCE, 2.63 ug/l TCE and 0.9 ug/l cis 1,2-DCE. Dissolved oxygen 0.3 mg/l, ORP -296.1 millivolts, dissolved organic carbon 344 mg/l and total dissolved solids 1,620 mg/l. Clearly potassium lactate is reaching the source area monitor well but to date, there has been no marked increase in the production of PCE daughter products.

Next Steps:
Conduct post active remedial monitoring.

Cost to Design and Implement:
Bioremediation system design: $2,200 Bioremediation system implementation (includes two sampling events): $49,400

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 system startup: February 25, 2003.

Final remediation design:
SVE System: Two 10 long vapor extraction wells, installed one foot beneath the facility floor slab via directionally drilling. The system is powered by a 3 HP rotary lobe Rotron blower. Startup flow rate was 36 scfm at 48 inces water column.

Results to date:
SVE system was shut down in December 2006. The first potassium lactate injection event was conducted on April 12, 2007: Twenty gallons of 60% potassium lactate solution was mixed with 2,000 gallons of water and injected into each of the two SVE lateral vapor recovery wells at approximatley 3 gpm. The second potassium lactate injection event was conducted form March 13-18, 2008. A total of 100 gallons of 60% potasssium lactate solution was mixed with 5,500 gallons of water and injected into the two SVE lateral vapor extraction wells at approximatley 10 gpm. Groundwater monitoring conducted on February 11, 2008, prior to the second injection event found detectable concentrations of contaminants (20.8 ug/l PCE, 2.49 ug/l TCE, & 2.96 ug/l Cis 1,2-DCE) in only one monitor well. That well is installed beneath the facility floor slab in the contaminant source area. Groundwater monitoring was conducted in September 2008 and found the following in the source area monitor well: 12.6 ug/l PCE, 2.63 ug/l TCE and 0.9 ug/l cis 1,2-DCE. Dissolved oxygen 0.3 mg/l, ORP -296.1 millivolts, dissolved organic carbon 344 mg/l and total dissolved solids 1,620 mg/l. Clearly potassium lactate is reaching the source area monitor well but to date, there has been no marked increase in the production of PCE daughter products.

Next Steps:
Conduct post active remedial monitoring.

Cost to Design and Implement:
SVE system design: $4,800 SVE system implementation: $51,800

Ex Situ Carbon Adsorption
 

Date implemented:
Soil vapor extraction system startup: February 25, 2003.

Final remediation design:
SVE System: Two 10 long vapor extraction wells, installed one foot beneath the facility floor slab via directionally drilling. The system is powered by a 3 HP rotary lobe Rotron blower. Startup flow rate was 36 scfm at 48 inces water column.

Results to date:
SVE system was shut down in December 2006. The first potassium lactate injection event was conducted on April 12, 2007: Twenty gallons of 60% potassium lactate solution was mixed with 2,000 gallons of water and injected into each of the two SVE lateral vapor recovery wells at approximatley 3 gpm. The second potassium lactate injection event was conducted form March 13-18, 2008. A total of 100 gallons of 60% potasssium lactate solution was mixed with 5,500 gallons of water and injected into the two SVE lateral vapor extraction wells at approximatley 10 gpm. Groundwater monitoring conducted on February 11, 2008, prior to the second injection event found detectable concentrations of contaminants (20.8 ug/l PCE, 2.49 ug/l TCE, & 2.96 ug/l Cis 1,2-DCE) in only one monitor well. That well is installed beneath the facility floor slab in the contaminant source area. Groundwater monitoring was conducted in September 2008 and found the following in the source area monitor well: 12.6 ug/l PCE, 2.63 ug/l TCE and 0.9 ug/l cis 1,2-DCE. Dissolved oxygen 0.3 mg/l, ORP -296.1 millivolts, dissolved organic carbon 344 mg/l and total dissolved solids 1,620 mg/l. Clearly potassium lactate is reaching the source area monitor well but to date, there has been no marked increase in the production of PCE daughter products.

Next Steps:
Conduct post active remedial monitoring.

Cost to Design and Implement:
SVE system design: $4,800 SVE system implementation: $51,800

Costs

Cost for Assessment:
  $137,500
Cost for Operation and Maintenance:
 
Total Costs for Cleanup:
 

Lessons Learned

Nutrients can be successfully introduced into the the shallow portion of the aquifer via lateral vapor extraction wells.

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: 2001
Remedial Action Plan; January 2002
SVE Construction Completion Report: March 2003.
Modified Remedial Action Plan (Biormediation): December 2005
Operation & Maintenance/Monitoring Reports: 2003 - 2008