Drycleaner Site Profiles

Park Avenue Cleaners, Richardson, Texas

Description
Historical activity that resulted in contamination.

Park Avenue Cleaners is an active PCE drycleaning facility that has been in operation since 1975. The facility is located in a shopping center in a commercial retail setting. PCE and TCE were identified in soil and groundwater during investigations conducted in 1998. The contaminant source areas are the soils beneath the facility floor slab and a utility trench.

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


Contaminant Media Concentration (ppb) Nondetect
cis-1,2-Dichloroethene groundwater 56 ppb
cis-1,2-Dichloroethene soil 56 ppb
Tetrachloroethene (PCE) groundwater 470 ppb
Tetrachloroethene (PCE) soil 44,590 ppb
Trichloroethene (TCE) groundwater 150 ppb
Trichloroethene (TCE) soil 940 ppb
trans-1,2-Dichloroethene groundwater 4 ppb
xylenes groundwater 1 ppb

Site Hydrology

Deepest Significant Groundwater Contamination:   12ft bgs
Plume Size:  
Average Depth to Groundwater:   9ft

Lithology and Subsurface Geology

 
  clay
Depth: 0-8ft bgs
8ft thick
Conductivity: 0.09ft/day
Gradient: 0.08ft/ft
 
  weathered limestone
Depth: 8-12ft bgs
4ft thick

Pathways and DNAPL Presence

checkGroundwater
Sediments
checkSoil
DNAPL Present

Remediation Scenario

Cleanup Goals:
  Soil: PCE = 5,000 µg/kg; TCE = 5,000 µg/kg

Groundwater: PCE = 500 µg/l; TCE = 500 µg/l

Technologies

In Situ Chemical Oxidation
 

Why the technology was selected:
Based on a four-month bench scale test, in-situ chemical oxidation using Fenton's reaction was chosen as the remedy for the site.

Date implemented:
September 2000

Final remediation design:
Three injection points were installed 60-80 ft apart to depths of 7-10 ft bgs. Prior to injection, hydraulic fracturing was used to propogate fractures in the clay and weathered limestone. Coarse sand was used as a proppant. Calculations showed that induced fractures had a radial extent of approximately 60 ft. A total of six injection events were conducted: four in September, one in October, and one in November of 2000. A total of 550 gallons of a biodegradeable surfactant was injected at each injection point to desorb the contaminants from the soil. Next, a total of 310 gallons of a proprietary catalyst solution was injected at each point. Finally, a mixture of a proprietary acid (total of 270 gallons) and a hydrogen peroxide solution (total of 640 gallons) was injected. The maximum injection rate was 1.0 gpm.

Results to date:
Post-remediation soil sampling was conducted in March 2001 and post-remediation groundwater sampling was conducted during the first half of 2001. Soil contaminant concentrations were reduced by 99% and contaminant concentrations in groundwater were reduced by 95-100%. The total area of groundwater treatment was approximately 0.4 acre.

Next Steps:
A Certificate of Completion was issued on October 16, 2002.

Costs

Cost for Assessment:
  No cost data was available.
Cost for Operation and Maintenance:
 
Total Costs for Cleanup:
 

Contacts

Merrie Smith
Texas Commission on Environmental Quality (TCEQ)
Voluntary Cleanup Program
12100 Park Circle, Bldg. D
Austin, Texas 78753

David Lent
IVI Environmental, Inc.
105 Corporate Park Drive
White Plains, New York 10604
Phone: 914-694-9600