Seattle, WA
June 2011
Public Invited to Comment
The U.S. Environmental Protection Agency (EPA)
requests comments on the proposed cleanup plan
for the Northwest EnviroService, Inc. (NWES) site.
The Statement of Basis contains EPA's recommen-
dation for cleanup. The public is invited to com-
ment on the proposed cleanup. The public comment
period is June 17 to August 1, 2011.
Read the Statement of Basis for Remedy Selection
and related documents at:
^S http://yosemite.epa.gov/R10/owcm.nsf/
RCRA/nwenviroservice
Send comments by August 1,2011 to
Laura Castrilli,
EPA Region 10, Suite 900, AWT-121,
1200 Sixth Avenue, Seattle, WA 98101 or
castrilli.laura@epa.gov
Requests for a public meeting must be made by
June 30,2011 For questions, or to request a public
meeting, call Laura Castrilli at 206-553-4323 or
1-800-424-4372 ext. 4323.
NWES operated a commercial hazardous waste
management facility at 1500 Airport Way S.,
Seattle until 1996. See map on next page. The site
is currently used by Emerald Recycling to recycle
used oil and treat industrial wastewater. Industrial
facilities and highways surround the site. A variety
of contaminants remain in the soil and groundwater
at the north end of the 1.25 acre site. Most of the
contamination is below EPA's proposed industrial
use cleanup standards. However, one "hot spot"
contains vanadium, a heavy metal, significantly
above the proposed industrial cleanup standard.
The main health threat at the site is from direct
contact with contaminated soil. The north end
of the site is completely paved thus preventing
contact with soil. There are no continuing releases
of contaminants to air or surface water. Shallow
groundwater at the site is contaminated but the
aquifer is isolated from the deeper aquifer in the
area. Also, the shallow aquifer is not a possible
drinking water source.
Cleanup Options
Two options were developed for this site.
Both options protect people's health and the
environment. Both options would require restrictive
covenants to prohibit groundwater use and limit
land use to industrial purposes.
Alternative 1:
Maintain existing asphalt and concrete pavement
to protect people from contact with contaminated
soil. NWES would have to ensure perpetual
maintenance of the pavement.
Alternative 2:
Dig up the most contaminated soil and replace it
with clean fill. A stormwater line is just south of the
contaminated sample location, which might prevent
complete removal of the most contaminated soil.
Also, if sampling confirms that highly toxic
hexavalent chromium is present, additional cleanup
may be required. The second option would not
require long term pavement maintenance. This
option will cost more, at least in the near future,
than Alternative 1.
EPA's Recommendation
Alternative 2 is more permanent, reliable and certain to protect human health and the environment.
EPA recommends this option.
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For More Information
Read the Statement of Basis for Remedy Selection and related documents at:
^S http://yosemite.epa.gov/R10/owcm.nsf/RCRA/nwenviroservice
or at the EPA Region 10 Library (1200 Sixth Avenue, Seattle)
8 Call for an appointment: 206-553-1289
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