Drycleaner Site Profiles

Joyce Cleaners, Farmers Branch, Texas

Description
Historical activity that resulted in contamination.

Joyce Cleaners facility is a leased space within a multi-tenant commercial retail strip center. The affected properties include both on- and off-site properties. Joyce Cleaners is currently in operation and is identified as using PCE as its drycleaning solvent.

Remediation Status: Site closed


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


Contaminant Media Concentration (ppb) Nondetect
trans-1,2-Dichloroethene groundwater 15 ppb
trans-1,2-Dichloroethene soil 530 ppb
cis-1,2-Dichloroethene groundwater 1,600 ppb
cis-1,2-Dichloroethene soil 2,900 ppb
Tetrachloroethene (PCE) groundwater 230 ppb
Tetrachloroethene (PCE) soil 560 ppb
Trichloroethene (TCE) groundwater 28 ppb
Trichloroethene (TCE) soil 340 ppb
Vinyl Chloride groundwater 310 ppb
Vinyl Chloride soil 1,800 ppb

Site Hydrology

Deepest Significant Groundwater Contamination:   20ft bgs
Plume Size:   Plume Length: 550ft
Plume Width: 100ft
Average Depth to Groundwater:   10ft

Lithology and Subsurface Geology

 
  Gravelly sand fill with pockets of clay
Depth: 0-2.5ft bgs
2.5ft thick
Gradient: 0.001ft/ft
 
  Silty/sandy clay
Depth: 2.5-10ft bgs
7.5ft thick
Gradient: 0.001ft/ft
 
  Gravel/silty sand
Depth: 10-20ft bgs
10ft thick
Gradient: 0.001ft/ft
 
  Clay
Depth: 20-25ft bgs
5ft thick
Gradient: 0.001ft/ft

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?
   

Remediation Scenario

Cleanup Goals:
  Reduce COC levels below MCLs
Remedy Level:
  Interim Action

Technologies

In Situ Biostimulation
 

Why the technology was selected:
In-situ chemical oxidation (ISCO) was selected because it does not require expensive pump systems, can treat area without disturbing aboveground structures, and does not require excavation and disposal of contaminated soils. The response action also compliments the natural attenuation processes to provide long term stability within the contaminant plume. NaMnO4 was selected as the oxidizing solution based upon the nature and location of the contamination, the size of the contaminated area, the type of soil present, and the hydrogeology of the area.

Date implemented:
April 2009

Final remediation design:
A dosage of 150 pounds per foot (lbs/ft) for 3DMe and 3.0 lbs/ft for HRC Primer. The dosage for 3DMe is based on an 11:1 dilution ratio. The biostimulation injection borings were advanced using a Geoprobe® 6620DT direct-push rig. Prior to boring at each injection location, a customized 1-ft long injection rod was attached to the first Geoprobe® probing rod and probed to the bottom of the GWBU at approximately 20 ft BGS. The emulsion was pumped into the formation at an approximate flow rate of 2 to 3 gallons per minute and an injection pressure of less than 100 pounds per square inch gauge.

Results to date:
Natural attenuation evaluation revealed that reductive dechlorination is occurring based on favorable geochemical conditions and detection of PCE daughter products (e.g. TCE,DCE and VC).

Cost to Design and Implement:
$73,308.55

In Situ Chemical Oxidation
 

Why the technology was selected:
In-situ chemical oxidation (ISCO) was selected because it does not require expensive pump systems, can treat area without disturbing aboveground structures, and does not require excavation and disposal of contaminated soils. The response action also compliments the natural attenuation processes to provide long term stability within the contaminant plume. NaMnO4 was selected as the oxidizing solution based upon the nature and location of the contamination, the size of the contaminated area, the type of soil present, and the hydrogeology of the area.

Date implemented:
April 2009

Final remediation design:
Five pails (285 pounds) of RemOx® L In Situ Chemical Oxidation (ISCO) reagent sodium permanganate (NaMnO4) (39.50 - 41 percent (%) solution) were shipped to Joyce Cleaners site for ISCO. The NaMnO4 solution was prepared by mixing one pail (57 pounds) of NaMnO4 with 40 gallons of potable water in a holding drum to attain approximately 5% NaMnO4 solution. This procedure was repeated four additional times. Injection locations were selected based on results of the February 2009 groundwater sampling event. Five injection points were advanced by a truck-mounted GeoProbe┬« using a direct-push hollow-probe rod assembly to a predetermined depth of 20 feet below grade level (bgl). The diluted NaMnO4 solution was pumped into the shallow saturated zone interval between 16 and 20 feet bgl using a Moyno pump through the hollow probe rod. Approximately 225 gallons of diluted NaMnO4 solution were injected through the five injection points (approximately 45 gallons of diluted NaMnO4 solution per injection point).

Results to date:
Natural attenuation evaluation revealed that reductive dechlorination is occurring based on favorable geochemical conditions and detection of PCE daughter products (e.g. TCE,DCE and VC).

Cost to Design and Implement:
$73,308.55

Costs

Cost for Assessment:
  $99,593.16
Cost for Operation and Maintenance:
 
Total Costs for Cleanup:
 

Contacts

David Cullen
Project Manager
Texas Commission on Environmental Quality
PST/DCRP Section, Remediation Division, MC-137
P.O. Box 13087
Austin, TX 78711-3087

Site Specific References

Field Activities Report 2010
Affected Property Assessment Report 2009