Drycleaner Site Profiles

Express Cleaners, Salina, Kansas

Description
Historical activity that resulted in contamination.

Between 1985 and 1988 several public water supply (PWS) wells were tested and found to contain low levels of VOCs. Investigations led to the Express Cleaners site as a source for PCE contamination in the PWS wells. The drycleaning building has since been torn down and replaced by the Salina Regional Health Center. The construction of the new building was completed in conjuction with the installation of the remediation system.

Remediation Status: In groundwater monitoring


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
1,2-Dichloroethane groundwater
1,1-Dichloroethene groundwater
1,1-Dichloroethene soil
Tetrachloroethene (PCE) groundwater
Tetrachloroethene (PCE) soil
Trichloroethene (TCE) groundwater
Trichloroethene (TCE) soil
trans-1,2-Dichloroethene groundwater

Site Hydrology

Deepest Significant Groundwater Contamination:  
Plume Size:   Plume Length: 3,600ft
Plume Width: 1,000ft
Plume Thickness: 50ft
Average Depth to Groundwater:   30ft

Lithology and Subsurface Geology

 
  Clay
Depth: 0-15ft bgs
15ft thick
Gradient: 0.007ft/ft
 
  silt
Depth: 15-30ft bgs
15ft thick
 
  Medium to coarse grained sand with some gravel
Depth: 30-75ft bgs
45ft thick
 
  bedrock
Depth: 75ft bgs

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?
  No 

Remediation Scenario

Cleanup Goals:
  Reduce PCE groundwater contamination to below EPA Maximum Contaminant Level (MCL) of 5 µg/L. Reduce PCE soil contamination in accordance with KDHE Risk-Based Standards of 180 µg/kg.
Remedy Level:
  Full Scale Remedy

Technologies

In Situ Soil Vapor Extraction
 

Why the technology was selected:
The technology was chosen based on cost and the geology. SVE systems work well in similar geology in Kansas.

Date implemented:
SVE wells installed in June 2001, system start-up in December 2001.

Final remediation design:
Five SVE wells to 25 ft with minimum 10 ft of screen. Rotron model DR454 blower. Four observation/radius of influence monitoring wells.

Results to date:
During installation six horizontal SVE wells were added underneath the new building's concrete basement. System was shut down in December 2007 and removed when asymptotic levels were reached. No significant rebound was seen in groundwater contamination at the site. A secondary source remains from the city sewer line in Santa Fe.

Next Steps:
Continue groundwater monitoring. Possible remediation around the secondary source.

Cost to Design and Implement:
$86,841.60

Costs

Cost for Assessment:
  $27,798.80
Cost for Operation and Maintenance:
  Roughly $5000-$7000 per year.
Total Costs for Cleanup:
 

Lessons Learned

The SVE wells were installed during other construction activities onsite making access to the new building basement easier.

Contacts

Joseph Dom, P.G.
Landfill / Drycleaner Remediation Unit
Bureau of Environmental Remediation
1000 SW Jackson St, Suite 410
Topeka, KS 66612-1367
(785) 296-4367 (voice)
(785) 296-4823 (fax)