Drycleaner Site Profiles

Ineeda Cleaners - Northgate, Hutchinson, Kansas

Description
Historical activity that resulted in contamination.

Ineeda Cleaners, 525 W. 30th was located in the Northgate Shopping Center in a retail development bordered by retail, residential and a church school. PCE was identified in the vicinity as part of an ESI in 1993 and the Kansas Drycleaning Program completed an ESA in 1997. Source area remediation was necessary. Contamination is primarily from leaks in the sanitary sewer lines. A sewer line runs perpendicular to groundwater flow and had multiple leaks along the first 1,000 feet of the line. These leaks created several finger-like plumes extending from the sewer line with the main plume extending from the facility.

Remediation Status: In groundwater monitoring


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


Contaminant Media Concentration (ppb) Nondetect
Tetrachloroethene (PCE) groundwater
Trichloroethene (TCE) groundwater
1,2-Dichloroethene groundwater

Site Hydrology

Deepest Significant Groundwater Contamination:   32ft bgs
Plume Size:   Plume Length: 3,500ft
Plume Width: 500ft
Plume Thickness: 17ft
Average Depth to Groundwater:   15ft

Lithology and Subsurface Geology

 
  Silty clay
Depth: 0-6ft bgs
6ft thick
Conductivity: 517ft/day
Gradient: 0.001ft/ft
 
  Sandy clay and silt
Depth: 6-9ft bgs
3ft thick
 
  Sand
Depth: 9-72ft bgs
63ft thick
 
  Shale
Depth: 72ft bgs

Pathways and DNAPL Presence

checkGroundwater
Sediments
checkSoil
DNAPL Present

Remediation Scenario

Cleanup Goals:
  Groundwater - reduce concentrations to below MCLs (PCE & TCE = 5 ppb).
Soil - Reduce soil concentrations to below Risk-based Standadrds for Kansas (RSK)(PCE = 180 ppb).

Technologies

In Situ Air Sparging
 

Why the technology was selected:
Sandy geology is very conducive to SVE and AS. Technology is proven in this region.

Date implemented:
Two SVE well were implemented in 4/1/98 and the enhanced SVE/AS system was started 5/3/99.

Final remediation design:
Two SVE wells were installed in 1998 with one being an interior 2"-ID well near the dry cleaning machine. The exterior well was a 4" well near the sewer line connection. The Enhanced SVE/AS system added five 4" SVE wells and eleven 2" AS wells. SVE blower is a 3 HP, 460V Rotron model capable of 200 cfm @ 10" of water. The AS system consists of two, 10HP, 460 V, Becker oil-less compressors capable of 50 cfm @ 10 psi. SVE wells operated around 30 scfm @ 12" water. AS wells operated around 10 scfm @ 10 psi.

Results to date:
SVE/AS system was shut down in approx. Jan 2002 due to the system reaching asymptotic conditions and groundwater concentrations that were below MCLs. The AS/SVE system was removed in August 2002 due to renovation of the strip mall property and the reduction of contaminants. Groundwater at the source area rebounded slightly above MCLs in 2003, but natural attenuation is acceptable for the lingering contamination.

Next Steps:
Long term monitoring to ensure natural attenuation is acceptable at this site.

Cost to Design and Implement:
SVE - $27,125 SVE/AS Enhancement - $76,722

In Situ Air Stripping
 

Other technologies used:
Pilot test using a NoVOCs in-well stripping system was conducted. Overall technology was successful, but NoVOCs was determined to be cost prohibitive for this site due to fouling issues and use fees.

In Situ Soil Vapor Extraction
 

Why the technology was selected:
Sandy geology is very conducive to SVE and AS. Technology is proven in this region.

Date implemented:
Two SVE well were implemented in 4/1/98 and the enhanced SVE/AS system was started 5/3/99.

Final remediation design:
Two SVE wells were installed in 1998 with one being an interior 2"-ID well near the dry cleaning machine. The exterior well was a 4" well near the sewer line connection. The Enhanced SVE/AS system added five 4" SVE wells and eleven 2" AS wells. SVE blower is a 3 HP, 460V Rotron model capable of 200 cfm @ 10" of water. The AS system consists of two, 10HP, 460 V, Becker oil-less compressors capable of 50 cfm @ 10 psi. SVE wells operated around 30 scfm @ 12" water. AS wells operated around 10 scfm @ 10 psi.

Results to date:
SVE/AS system was shut down in approx. Jan 2002 due to the system reaching asymptotic conditions and groundwater concentrations that were below MCLs. The AS/SVE system was removed in August 2002 due to renovation of the strip mall property and the reduction of contaminants. Groundwater at the source area rebounded slightly above MCLs in 2003, but natural attenuation is acceptable for the lingering contamination.

Next Steps:
Long term monitoring to ensure natural attenuation is acceptable at this site.

Cost to Design and Implement:
SVE - $27,125 SVE/AS Enhancement - $76,722

Costs

Cost for Assessment:
  28,421
Cost for Operation and Maintenance:
  27,884
Total Costs for Cleanup:
  160,152

Lessons Learned

Hand augering the interior SVE well is very hard work, but well worth the effort for reducing the mass in the soil.

Thorough evaluation around the sewer line was very beneficial at this site due to the detection of multiple leaks in the line for up to 1,000 feet from the dry cleaning facility.

Longer rebound evaluation is preferred, but property owner renovations led KDHE to remove the system earlier than normal due to a parking lot resurfacing project.

Contacts

Bob Jurgens, Project Manager
KDHE
1000 SW Jackson, Suite 410, Topeka, KS 66612
Phone 785-291-3250
e-mail: bjurgens@kdhe.state.ks.us