State Coalition for Remediation of Drycleaners Site Profiles
Comet Cleaners, Arlington, Texas
Description
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| The site and surrouding area have been used for both residential and commercial/industrial purposes. In the early to mid 1900s, the site was mainly residential, but by 1984 it was verified as a commercial site. Dry cleaning operations have been conducteds in one lease space on the strip mall property for approximately 10 years, beginning around 1994. Chlorinated solvents were used in the past. 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 | ||
| Tetrachloroethene (PCE) | groundwater | ||
| Trichloroethene (TCE) | groundwater | ||
| Vinyl Chloride | groundwater |
Site Hydrology
| Deepest Significant Groundwater Contamination: | 12ft bgs | |
| Plume Size: | Plume Length: 375ft Plume Width: 40ft |
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| Average Depth to Groundwater: | 11ft |
Lithology and Subsurface Geology
| moderate to high plasticity clay with some 30% sand |
Pathways and DNAPL Presence
 GroundwaterSedimentsSoil Presumptive Evidence of DNAPL |
Vapor Intrusion Pathway
Has the potential for vapor intrusion (VI) been evaluated? |
No |
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Has a vapor mitigation system been installed? |
Remediation Scenario
Cleanup
Goals: |
*The soil cleanup goals were& PCE 5 mg/kg TCE 3.4 mg/kg cisDCE 25 mg/kg VC 2.2 mg/kg (Note: this is 100x the soil to gw PCLs for GW Class 1 and 2 situations) GW clean up goals: MCLs x100 |
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Remedy Level: |
Interim Action |
Technologies
In Situ Chemical Oxidation |
Why the technology was selected: Date implemented: Final remediation design: Results to date: Next Steps: |
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In Situ Monitored Natural Attenuation |
Why the technology was selected: Date implemented: Results to date: Next Steps: |
Costs
Cost
for Assessment: |
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Cost
for Operation and Maintenance: |
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Total
Costs for Cleanup: |
$93,614 (cost includes FY10 ISCO Pilot and 5 GW monitoring events post the remediation) |
Lessons Learned
| The ISCO Pilot study proved that chem-ox remediation is effective in the short term, but may require more than one treatment to meet clean up goals. |
Contacts
| Dan Switek PST / DCRP Section Remediation Division Texas Commission on Environmental Quality (TCEQ) dan.switek@tceq.texas.gov 512-239-4132 |
