Drycleaner Site Profiles

Best Cleaners, Wichita, Kansas

Description
Historical activity that resulted in contamination.

The site is part of a larger investigation within the city of Wichita known as the Gilbert Mosley Plume. Drycleaning operations were conducted in a strip mall using tetrachloroethylene (PCE). Currently the building is used by the New Life Outreach Mission. Contaminants were found primarily along the city sewer line southwest of the former facility. At some point before investigation and remediation the City replaced the sewer line and probably removed some of the contaminated soil in the process. The site was investigated and is being remediated through the Kansas Drycleaner Environmental Response Act.

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
Tetrachloroethene (PCE) groundwater
Tetrachloroethene (PCE) soil
Trichloroethene (TCE) groundwater
Trichloroethene (TCE) soil

Site Hydrology

Deepest Significant Groundwater Contamination:  
Plume Size:   Plume Length: 550ft
Plume Width: 350ft
Plume Thickness: 25ft
Average Depth to Groundwater:   17ft

Lithology and Subsurface Geology

 
  Interbedded silts and clays
Depth: 0-9ft bgs
9ft thick
Gradient: 0.001ft/ft
 
  sand
Depth: 9-40ft bgs
31ft thick
 
  shale bedrock
Depth: 40ft 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:
  Groundwater and soil below the respective EPA maximum contaminant levels for PCE and PCE degredation products.
Remedy Level:
  Full Scale Remedy

Technologies

In Situ Air Sparging
 

Why the technology was selected:
The technology was selected based on cost and efficiency given the site geology.

Date implemented:
System start-up September 2006.

Final remediation design:
Four vertical SVE wells screened from 5-15 ft bgs, five AS wells screened from 35 ft bgs to 37 ft bgs, three monitoring wells to determine radius of influence.

Results to date:
The initial design involved two remediation systems. After reviewing information on an active system in the area, only one of the systems was installed. The system was shut down in November 2008 following a year of groundwater sampling indicating contaminants were below MCL or non-detect.

Next Steps:
Long-Term rebound study. Continue groundwater monitoring.

Cost to Design and Implement:
$51,768.85 for all technologies

In Situ Soil Vapor Extraction
 

Why the technology was selected:
The technology was selected based on cost and efficiency given the site geology.

Date implemented:
System start-up September 2006.

Final remediation design:
Four vertical SVE wells screened from 5-15 ft bgs, five AS wells screened from 35 ft bgs to 37 ft bgs, three monitoring wells to determine radius of influence.

Results to date:
The initial design involved two remediation systems. After reviewing information on an active system in the area, only one of the systems was installed. The system was shut down in November 2008 following a year of groundwater sampling indicating contaminants were below MCL or non-detect.

Next Steps:
Long-Term rebound study. Continue groundwater monitoring.

Cost to Design and Implement:
$51,768.85 for all technologies

Costs

Cost for Assessment:
  $16,103.17
Cost for Operation and Maintenance:
  Approximately $10,000 per year
Total Costs for Cleanup:
 

Contacts

Scott Yankey, Unit Manager
Dry Cleaning & Landfill Remediation Programs
Bureau of Environmental Remediation
Kansas Dept. of Health & Environment
Ph: 785-296-8025
E-mail: syankey@kdheks.gov