Drycleaner Site Profiles

314 Wendell Avenue (former Dry Cleaner), Fairbanks, Alaska

Description
Historical activity that resulted in contamination.

Located in downtown Fairbanks; In operation as various businesses since 1953. Listed in Alaska Department of Commerce business license database as Neighborette Laundry (1953), White Swan Laundry (1968-1983), Quality Cleaners & Laundry (1973-1982), B & C Commercial Dry B & C Commercial Dry Cleaners & Laundry (1987), B & C Swan (1988), Fairbanks Cleaners and Linen Supply (2003-2007), M C Commercial Laundry & Dry Cleaners (1996-2004), Currently dba ES Laundry (2011 to present). Historical releases of tetrachloroethene (PCE) to the vadose zone likely as onsite spills (outside loading area of Laundromat, and likely inside) and from solvent disposal to wood stave underground sewer lines. Groundwater contacts the source zone and has created area of groundwater contamination that exceeds the ADEC groundwater cleanup levels, extending approximately 500 feet down gradient to the Chena River.

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
cis-1,2-Dichloroethene soil
Tetrachloroethene (PCE) groundwater
Tetrachloroethene (PCE) soil
Trichloroethene (TCE) groundwater
Trichloroethene (TCE) soil
trans-1,2-Dichloroethene groundwater
trans-1,2-Dichloroethene soil
Vinyl Chloride groundwater

Site Hydrology

Deepest Significant Groundwater Contamination:   40ft bgs
Plume Size:   Plume Length: 700ft
Plume Width: 250ft
Plume Thickness: 40ft
Average Depth to Groundwater:   10.5ft

Lithology and Subsurface Geology

 
  Unconsolidated Grvl, Sd, Slt

Gradient: 0.0032ft/ft

Pathways and DNAPL Presence

Groundwater
Sediments
Soil
checkPresumptive Evidence of DNAPL

Vapor Intrusion Pathway

Has the potential for vapor intrusion (VI) been evaluated?
  Yes
How was the site evaluated?
  Soil vapor and/or Sub-slab vapor sampling,Indoor air sampling,Groundwater sampling,Used an exposure screening model
Results of VI evaluation:
  A completed VI pathway has been indentified
Has a vapor mitigation system been installed?
  Yes 
Type of Vapor Mitigation System(s):
  Sub-slab Depressurization
Soil Vapor Extraction
Additional VI Information:
  VI assessments also conducted in neighboring buildings allowing access to DEC contractors.

Remediation Scenario

Cleanup Goals:
  Source removal
Groundwater cleanup
Remedy Level:
  Full Scale Remedy

Technologies

In Situ Soil Vapor Extraction
 

Why the technology was selected:
Sub-slab depressurization and soil vapor excavation systems installed to mitigate vapor intrusion and to treat contaminated soils beneath and around building.

Date implemented:
February 2011 (SSD) June 2011 (SVE)

Other technologies used:
In situ enhanced bioremediation planned for groundwater cleanup

Results to date:
Indoor air PCE and TCE levels have dropped below ADEC target levels for commercial facilites (21 and 1.1 ug/m3, respectively).

Next Steps:
Continued operation of SSD & SVE systems (into 2014) and initiation of groundwater treatment

Cost to Design and Implement:
$518,763 (all technologies)

In Situ Other
 

Why the technology was selected:
Sub-slab depressurization and soil vapor excavation systems installed to mitigate vapor intrusion and to treat contaminated soils beneath and around building.

Date implemented:
February 2011 (SSD) June 2011 (SVE)

Other technologies used:
In situ enhanced bioremediation planned for groundwater cleanup

Results to date:
Indoor air PCE and TCE levels have dropped below ADEC target levels for commercial facilites (21 and 1.1 ug/m3, respectively).

Next Steps:
Continued operation of SSD & SVE systems (into 2014) and initiation of groundwater treatment

Cost to Design and Implement:
$518,763 (all technologies)

Costs

Cost for Assessment:
  $1,000,000 (included release investigation, additional site characterization, vapor intrusion assessment of neighboring buildings)
Cost for Operation and Maintenance:
  $107,280 (includes systems operations & periodic vapor intrusion assessments)
Total Costs for Cleanup:
  $1.6 million

Contacts

James Fish
Alaska Dept. Environmental Conservation
Contaminated Sites Program
610 University Ave.
Fairbank, AK 99709

907-451-2117

james.fish@alaska.gov