General Information

Site Name and Location:		Coral Cleaners Hollywood, Florida, United States
Description: Historical activity that resulted in contamination.		This is an active PCE drycleaning facility that has been in operation since 1966. It is located in a strip mall in a mixed retail commercial/residential setting. PCE was formerly stored in an above-ground storage tank (AST) located in the southeastern corner of the facility. A wastewater sample collected from the sanitary sewer in an earlier investigation showed a PCE concentration of 9,610 µg/L. Identified contaminant source areas at the site were: the drycleaning machine, AST, and sanitary sewer lateral.

Contaminants:

Contaminants: Contaminants present and the highest amount detected in both soil and groundwater (please avoid giving ranges).		Contaminant Conc in GW Conc. in Soil cis-1,2-Dichloroethene 460 µg/L Tetrachloroethene (PCE) 430 µg/L 6,097 µg/kg trans-1,2-Dichloroethene 7.31 µg/L Vinyl Chloride 290 µg/L
Other Contaminants Present: Indicates what other contaminants were found on-site
Deepest Significant Groundwater Contamination:		57 ft BGS
Plume Size:		400 ft x 240 ft x 57 ft

Site Hydrology:

Depth to Groundwater:		8 - 9 ft bgs
Lithology and Subsurface Geology:		Surface - 20 ft bgs: fine to medium-grained sand with limestone stringers; 20-58 ft bgs: fine to medium-grained sand; 58-70 ft bgs: limestone
Conductivity:		88 ft/day ft/day
Gradient:		0.0013 ft/ft

Pathways and DNAPL Presence:

Pathways:		Groundwater Soil
DNAPL Presence:		No

Vapor Intrusion Pathway:

Has the potential for vapor intrusion (VI) been evaluated?

No

Remediation Scenario:

Cleanup Goals:

Groundwater: PCE = 3 µg/L, TCE = 3 µg/L, cis 1,2-DCE = 70 µg/L, trans 1,2-DCE = 100 µg/L, vinyl chloride = 1 µg/L. Soil: PCE = 30 µg/kg, TCE = 30 µg/kg

Technologies:

Technologies Used:		In Situ: Monitored Natural Attenuation Soil Vapor Extraction Ex Situ: Carbon Adsorption Soil Removal
Other technologies used:
Why the technology was selected:		Soil vapor extraction was chosen as the soil remedy, because it is an effective technology for removing VOCs from permeable unsaturated soils. Monitored natural attenuation was chosen as the groundwater remedy, because contaminant levels were low in groundwater and reductive dechlorination was actively occurring. It was believed that removing the contaminants from the unsaturated zone in conjuction with the already-occurring reductive dechlorination in groundwater would result in site closure.
Date implemented:		May 7, 2003
Final remediation design:		Three vapor 4-inch diameter PVC extraction wells screened 3-6 ft bgs. A 3-H.P. Rotron blower. Off gas treated with two 170-lb G.A.C. units. Design flow rate was 55 cfm/well and 3" w.c./well.

Results and Next Steps:

Results to date:		SVE system was shut down in April 2004. The system recovered an estimated 4.2 lbs of VOCs. Groundwater monitoring was conducted after shut down of the SVE system. Groundwater cleanup target levels were met except in samples from monitoring wells located south of the drycleaning facility near the sanitary sewer lateral that served the strip mall. In May 2006, a camera was run down the sewer line. Numerous cracks and and some partial collapses of sections of sewer pipe were documented. The City of Hollywood repaired the sewer line, and contaminant concentrations in nearby monitoring wells dropped below cleanup target levels.
Next Steps:		The site has met the No Further Action Criteria and a Site Rehabilitation Order will be issued for the site.

Costs:

Cost for Assessment:		$153,900
Cost to Design and Implement:		$86,400
Cost for Operation and Maintenance:		$90,500 (includes monitoring) $7,000 site closure & restoration
Total Costs for Cleanup:		$337,800

Lessons Learned:

Lessons Learned:

Failure to identify continuing sources of contamination from active drycleaning operations will preclude closure at most sites.

Contacts:

Principal Point of Contact:

Andrea Bain, Project Manager Bureau of Waste Cleanup (MS4520) Florida Department of Environmental Protection 2600 Blair Stone Road Tallahassee, Florida 32399-2400 Phone: (850) 245-8970 E-mail: Andrea Bain@DEP.state.fl.us Contractor: Guy Frearson, Consultant Metcalf & Eddy, Inc. 3740 Executive Way Miramar, Florida 33025 Phone: (954) 450-5144 E-mail: Guy.Frearson@m-e.aecom.com

Site Specific References:

Site Specific References:

Site Assessment Report - 1997 Remedial Action Plan - 2002 SVE System Start-up Report - 2003 Operation & Maintenance Reports Groundwater Monitoring Reports

Images:

Images of Site: