Washland Cleaners, Dickson, Tennessee

State Coalition for Remediation of Drycleaners Site Profiles

Description
Historical activity that resulted in contamination.

This is a commercial property that operated as a drycleaner from 1987-1999. Site contamination is suspected to be related to operation activities which may include releases to interior drains and/or floor joints from spills associated with waste storage and/or the transfer of PCE from an AST to drycleaning cleaning machines via buckets or gravity feed lines.

Remediation Status: In groundwater monitoring

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

Contaminant	Media	Concentration (ppb)
cis-1,2-Dichloroethene	groundwater	250 ppb
cis-1,2-Dichloroethene	soil	18.3 ppb
No corresponding contaminant	groundwater	2.1 ppb
Tetrachloroethene (PCE)	groundwater	5,200 ppb
Tetrachloroethene (PCE)	soil	172 ppb
Trichloroethene (TCE)	groundwater	82 ppb
trans-1,2-Dichloroethene	groundwater	6.9 ppb
Vinyl Chloride	groundwater	15 ppb

Site Hydrology

Deepest Significant Groundwater Contamination:		40ft bgs
Plume Size:		Plume Length: 162ft Plume Width: 112ft Plume Thickness: 40ft
Average Depth to Groundwater:		24.5ft

Lithology and Subsurface Geology

Deeply weathered brown to red clays with small quantities of silt to sand size particles and fine textured limestone and chert fragments increasing in both size and abundance with depth.

Conductivity: 0.01095ft/day
Gradient: 0.035ft/ft

Pathways and DNAPL Presence

Groundwater

Sediments

Soil

DNAPL Present

Remediation Scenario

Cleanup Goals:

Acheive MCLs

Technologies

In Situ Chemical Oxidation

Why the technology was selected:
The groundwater plume was concentrated in a relatively small area. ISCO was selected because it appeared to be a feasible technology for rapidly remediating a relatively small area of concern.

Date implemented:
May 3, 2004

Final remediation design:
Sodium permanganate (40%) was injected into 14 injection points from 14 to 43-ft bgs. The injection points were spaced to cover the source zone of the groundwater plume.

Results to date:
2 wells (MW-4 and MW-15) have shown dramatic decreases in PCE levels (1.2 ppm to 0.660 ppm; 5.2 ppm to 0.720 ppm)

Next Steps:
2nd ISCO injection on 02/15/05. Additional groundwater monitoring and a 3rd ISCO injection will be considered if needed.

Costs

Cost for Assessment:		$32,538.28
Cost for Operation and Maintenance:
Total Costs for Cleanup:		Site in progress. Total costs are not available.

Lessons Learned

When injecting ISCO, add more volume than recommended by vendor to ensure complete coverage. When injecting permanganate, make sure personnel are wearing appropriate protective gear.

Contacts

Drycleaner Environmental Response Program
4th Floor, L&C Annex
401 Church Street
Nashville, TN 37243
615-532-0900

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U.S. EPA Contaminated Site Cleanup Information (CLU-IN)

State Coalition for Remediation of Drycleaners Site Profiles