Drycleaner Site Profiles

Harbour Place Cleaners, Jacksonville, Florida

Description
Historical activity that resulted in contamination.

PCE drycleaning operations began at this site in 1991. Sometime prior to 2000, the facility switched from PCE to Rynex, a glycol ether-based drycleaning solvent. In 2008, the facility began using DF-2000, a petroleum drycleaning solvent. The identified contaminant source areas at the site are the soils beneath the floor slab near the drycleaning machine and the area outside the service door where wastewater was reportedly discharged to the pavement. The facility is located in a bay in a shopping center in a mixed retail commercial/residential setting.

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 180 ppb
ethylbenzene soil 3.9 ppb
Tetrachloroethene (PCE) groundwater 49.5 ppb
Tetrachloroethene (PCE) soil 97 ppb
Trichloroethene (TCE) groundwater 35.6 ppb
toluene soil 13 ppb
trans-1,2-Dichloroethene groundwater 5 ppb
Vinyl Chloride groundwater 2.3 ppb
p-Xylene soil 30 ppb

Site Hydrology

Deepest Significant Groundwater Contamination:   37ft bgs
Plume Size:   Plume Length: 155ft
Plume Width: 55ft
Plume Thickness: 31ft
Average Depth to Groundwater:   7.99ft

Lithology and Subsurface Geology

 
  fine-grain sand
Depth: 0-37ft bgs
37ft thick
Gradient: 0.014ft/ft
 
  silty, sandy clay
Depth: 37-45ft bgs
8ft thick
 
  clay
Depth: 45-47ft bgs
2ft thick
 
  silty, fine-grain sand
Depth: 47-50ft bgs
3ft thick
 
  clay
Depth: 50-55ft bgs
5ft thick
 
  limestone
Depth: 55-60ft bgs
5ft 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, vinyl chloride - 1 ug/l
Remedy Level:
  Full Scale Remedy

Technologies

In Situ Monitored Natural Attenuation
 

Why the technology was selected:
Monitored natural attenuation was selected was selected as the groundwter remedy because contaminant concentrations in groundwater were relatively low and reductive dechlorination of PCE was occurring in groundwater.

Results to date:
The soil vapor extraction system was shut down on September 21, 2011. Confirmatory soil sampling found no soil contamination exceeding any cleanup target level. During the last groundwater monitoring event only one well yielded a groundwater sample with a contaminant in a concentration exceeding an MCL: 5.0 ug/l PCE.

Next Steps:
Conduct post-active remedial groundwater monitoring.

Cost to Design and Implement:
All technologies: Design: $9,900 Implementation: $82,200

In Situ Soil Vapor Extraction
 

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

Date implemented:
August 19, 2009

Final remediation design:
The soil vapor extraction system consists of seven (7) vertical vapor extraction wells and one vertical passive venting well. The vapor extraction wells are are screneed 1-8 feet BLS. The system is powered by a 7.5 HP regenerative blower. Off gas is treated via a 170 -lb. G.A.C. vessel. The design flow rate is 250 acfm.

Results to date:
The soil vapor extraction system was shut down on September 21, 2011. Confirmatory soil sampling found no soil contamination exceeding any cleanup target level. During the last groundwater monitoring event only one well yielded a groundwater sample with a contaminant in a concentration exceeding an MCL: 5.0 ug/l PCE.

Next Steps:
Conduct post-active remedial groundwater monitoring.

Cost to Design and Implement:
All technologies: Design: $9,900 Implementation: $82,200

Ex Situ Carbon Adsorption
 

Date implemented:
August 19, 2009

Final remediation design:
The soil vapor extraction system consists of seven (7) vertical vapor extraction wells and one vertical passive venting well. The vapor extraction wells are are screneed 1-8 feet BLS. The system is powered by a 7.5 HP regenerative blower. Off gas is treated via a 170 -lb. G.A.C. vessel. The design flow rate is 250 acfm.

Results to date:
The soil vapor extraction system was shut down on September 21, 2011. Confirmatory soil sampling found no soil contamination exceeding any cleanup target level. During the last groundwater monitoring event only one well yielded a groundwater sample with a contaminant in a concentration exceeding an MCL: 5.0 ug/l PCE.

Next Steps:
Conduct post-active remedial groundwater monitoring.

Cost to Design and Implement:
All technologies: Design: $9,900 Implementation: $82,200

Costs

Cost for Assessment:
  $75,800
Cost for Operation and Maintenance:
  $32,200 - Total Groundwater Monitoring: $7000/year
Total Costs for Cleanup:
 

Lessons Learned

Conventional soil sampling found little contamination. A modified active soil gas sampling survey produced a soil gas sample with a VOC concentration of 50.7 milligrams per cubic meter.

Contacts

Melissa Garvin, project manager
Bureau of Waste Cleanup (MS4520)
Florida Department of Environmental Protection
2600 Blair Stone Road
Tallahassee, Florida 32399-2400
Phone: (850) 245-8994
E-mail: Melissa.Garvin@dep.state.fl.us

Kelly Baltz, P.E. consultant
Golder Associates, Inc.
9428 Baymeadows Road, Suite 400
Jacksonville, Florida 32256-7979
Phone: (904) 421-4231
E-mail: Kelly_Baltz@golder.com

Site Specific References

Site Assessment Report: 2001
Remedial Action Plan: 2008
Operation & Maintenance Reports: 2009 -2011
Groundwater Monitoring Reports: 2002-present