Drycleaner Site Profiles

Former Heritage Cleaners (D-19-177), Nashville, Davidson County, Tennessee

Description
Historical activity that resulted in contamination.

Abandoned drycleaning facility located in a strip mall in a mainly commercial part of Nashvile. The facility was constructed in 1984 and began operation as a drycleaner in 1985. The facility operated until 1991 when it became a pickup/drop off store. The facility used PCE during its years of operation. Prior to becoming a strip mall the site was occupied by a gas station and a restaurant, which were demolished for construction of the present strip mall. No private water wells or municipal drinking water intakes

Remediation Status: In active remediation


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


Contaminant Media Concentration (ppb) Nondetect
cis-1,2-Dichloroethene groundwater
cis-1,2-Dichloroethene soil
Tetrachloroethene (PCE) groundwater
Tetrachloroethene (PCE) soil
Trichloroethene (TCE) groundwater
Trichloroethene (TCE) soil
Vinyl Chloride groundwater

Site Hydrology

Deepest Significant Groundwater Contamination:  
Plume Size:  
Average Depth to Groundwater:   19.75ft

Lithology and Subsurface Geology

 
  brown, silty loams, silty clays and yellowish-brown firm clays
Depth: 0-7.5ft bgs
7.5ft thick
Gradient: 0.073ft/ft
Leipers and Catheys Formation
  limestone
Depth: 7.5ft bgs

Pathways and DNAPL Presence

checkGroundwater
Sediments
checkSoil
checkPresumptive Evidence of DNAPL

Vapor Intrusion Pathway

Has the potential for vapor intrusion (VI) been evaluated?
  Unknown
Has a vapor mitigation system been installed?
  No 

Remediation Scenario

Cleanup Goals:
  Cleanup goals are EPA MCLs.
Remedy Level:
  Full Scale Remedy

Technologies

In Situ Chemical Oxidation
 

Why the technology was selected:
ISCO (sodium permanganate)was selected because the source area was relatively small and located under the floor slab of the facility in the location of the former drycleaning machines. The soil horizon under the building, 1 to 2 feet in thickness, is very thin and is mostly fill gravel on top of bedrock. It was thought that ISCO would remediate the contamination relatively quickly and be more cost effective.

Date implemented:
1st ISCO Injection Event - October 18, 2006

Final remediation design:
Four injection wells of 1-inch diameter PVC screen were installed in the area of the former drycleaning machine to the soil/bedrock interface (approximately 2 feet bgs). 1). 1st ISCO Injection Event - 34 gallons of 10% sodium permanganate solution was injected into each injection well. During the event it was found that one of the injection wells had significant breakthrough and was deemed unusable and abandoned. The remaining solution earmarked for this well was then placed in the three remaining injection wells. 2). 2nd Injection Event - December 7, 2006. 50 gallons of 10% sodium permanganate solution was injected into each of the three injection wells. 3). 3rd Injection Event - January 26, 2007. 50 gallons of 10% sodium permanganate solution was injected into each of the three injection wells. 4). 4th Injection Event - January 15, 2008. 40 to 50 gallons of 10% sodium permanganate solution was injected into each of the three injection wells. These injections were followed by the injection of 10 to 50 gallons of water, depending on the points ability to "take" the water, to move the solution out into the surrounding area. 5). 5th Injection Event - January 15, 2008. 40 to 50 gallons of 10% sodium permanganate solution was injected into each of the three injection wells. These injections were followed by the injection of 10 to 50 gallons of water into each point, depending on the points ability to "take" the water, to move the solution out into the surrounding area.

Results to date:
Pre-injection contaminant levels: October 17, 2006 PCE - 19 mg/L TCE -.100 mg/L DCE -.790 mg/L VC - .001 mg/L Post injection contaminant levels: October 21, 2008 (Last sampling event) PCE - 2.7 mg/L TCE - .093 mg/L DCE - 1.9 mg/L VC - .067 mg/L

Next Steps:
Excavation of contaminated soil under the facility in the area of the former drycleaning machine.

Cost to Design and Implement:
$31,280.00

Costs

Cost for Assessment:
  Sufficient site assessment had been accomplished prior to sites entry into DCERP. No Program money was spent on assessment.
Cost for Operation and Maintenance:
 
Total Costs for Cleanup:
 

Contacts

Alison Buford
TDEC/DOR/DCERP
401 Church Street, Nashville, TN. 37243
615-532-0932


David Proctor
TVG Environmental, Inc.
3200 West End Avenue, Suite 401
Nashville, TN. 37203
615.292.6252