State Coalition for Remediation of Drycleaners Site Profiles
Blue Ribbon Cleaners, Tallahassee, Florida
Description
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| Blue Ribbon Cleaners is an active PCE drycleaning facility that has been operating since 1991. It is located in a shopping center in retail commercial setting.
The contaminant source area is the soil beneath the facility floor slab. 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 | ||
| Trichloroethene (TCE) | groundwater |
Site Hydrology
| Deepest Significant Groundwater Contamination: | 42ft bgs | |
| Plume Size: | Plume Length: 220ft Plume Width: 155ft Plume Thickness: 19ft |
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| Average Depth to Groundwater: | 23ft |
Lithology and Subsurface Geology
| very fine-grained to fine-grained sand Depth: 0-23ft bgs 23ft thick Conductivity: 2.69ft/day Gradient: 0.067ft/ft |
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| silty, very fine to fine-grained sand Depth: 23-31ft bgs 8ft thick |
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| dry plastic clay Depth: 31-40ft bgs 9ft thick |
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| clayey, silty, fine-grained sand Depth: 40-42ft bgs 2ft thick |
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| silty fine-grained sand with minor clay and limes Depth: 42-44ft bgs 2ft thick |
Pathways and DNAPL Presence
 GroundwaterSedimentsSoilDNAPL Present |
Vapor Intrusion Pathway
Has the potential for vapor intrusion (VI) been evaluated? |
No |
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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 (leachability) Groundwater: PCE = 3 ug/L |
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Remedy Level: |
Full Scale Remedy |
Technologies
In Situ Monitored Natural Attenuation |
Why the technology was selected: Next Steps: Cost to Design and Implement: |
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In Situ Soil Vapor Extraction |
Why the technology was selected: Date implemented: Final remediation design: Results to date: Next Steps: Cost to Design and Implement: |
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Ex Situ Carbon Adsorption |
Date implemented: Final remediation design: Results to date: Next Steps: Cost to Design and Implement: |
Costs
Cost
for Assessment: |
$ 172,500 | |
Cost
for Operation and Maintenance: |
O&M + Site Restoration: $139,200 | |
Total
Costs for Cleanup: |
$495,600 |
Lessons Learned
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1. Although over 100 soil samples were collected at this site and analyzed, very little contamination was found. However an active soil gas survey was conducted (MAGS)and PCE concentrations in soil gas samples ranged as high as 257 milligrams per cubic meter, which lead to the decision to install a soil vapor extraction system at the site. 2. In order to evaluate the possible contribution of PCE vapors from the ongoing drycleaning operations to the VOCs recovered by the SVE system, some field research was conducted and for a period of nineteen (19)consecutive days in April 2011. PCE concentrations in air were monitored at three different areas: inside the building near the back of the drycleaning machine; at a vapor extraction well installed beneath the facility floor slab near the drycleaning machine and the SVE system influent. Air was monitored using a ppbRAE PID (continuous monitoring), time weighted samples were collected using Waterloo Membrane Samplers (passive soil gas device) and some grab samples were collected utilizing Summa cannisters. The highest PCE concentrations detected in the monitored vapor extraction well and the SVE influent was on days drycleaning was being conducted at the site. However, the highest VOC concentrations were detected after the building was shut down for the day. During the day, three doors to the building were genreally open and an interior fan and a large exhaust fan mounted in the back wall of the building were generally running. The interpretation of the data is that during the day, VOC vapors are being exhausted from the building through the open doors and the vent fan. When the facility is shut down at night and the doors are closed and the fans are turned off, the operating SVE system captures PCE vapors in the the drycleaning facility. This phenomenon should be taken into consideration when evaluating when to shut down an SVE system that has vapor recovery wells installed beneath the facility floor slab of an active drycleaning facility. |
Contacts
| Aaron Cohen Florida Dept. of Environmental Protection Bureau of Waste Cleanup, MS 4500 2600 Blair Stone Road Tallahassee, Florida 32399 850-245-8974 Aaron.Cohen@dep.state.fl.us Dave Riotte, P.E. Geosyntec Inc. 1200 Riverplace Boulevard #710 Phone: (904) 858-1818 E-Mail: Driotte@Geosyntec.com |
Site Specific References
| Site Assessment Report: 2005 Remedial Action Plan: 2008 Operation & Maintenance Reports: 2009 - 2011. Groundwater Monitoring Reports: 2006 - 2012 |
