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2.1.1 Narrative
2.1.2 Response Actions to Date
2.1.2.a Removal actions were undertaken by the Oregon Department of Environmental Quality (ODEQ) in 2000 and 2014. For additional information and details please see PolReps 1 through 6.
2.1.2.b. The following removal actions have been undertaken by EPA as part of this ongoing removal action for the current reporting period: November 10 - December 6, 2014
The primary activities during this period included the following
tasks:
• Completion of the repository soil cover to include final seed, straw, and slash placement.
• Installation of the southern portion of the repository toe drain trench.
• Installation of the septic effluent lines between the residences and the drain field.
• Completion of drainage channels in Area 1.
• Finalization of the purchase of manufactured home located in Klamath Falls.
• Transportation and placement of Klamath Falls manufactured home at Residence 1.
• Connection of water, power, and phone utilities to both residences.
• Completion of Maintenance, Monitoring, and Repair (MM&R) plan.
• Demobilization of work trailers and other equipment from the site.
• Demobilization of EPA, START and ERRS personnel from the site.
• Perform final grading, reclamation, and surface restoration of disturbed areas.
Rain
showers and wet site conditions resulted in intermittent delays during the current
operational period. Task scheduling was assessed daily based on current
conditions and weather forecasts in consideration of site safety, and to avoid
damage to the site from working in unsuitable conditions. The work crews were
not on site during the week of November 23 – 30 in recognition of the
Thanksgiving holiday.
ERRS
used the bulldozer to trackwalk the repository slope to create texture prior to
application of pellet fertilizer and turfgrass seed mix. Slash was placed on
the repository cover for erosion control using the mini-excavator. The
excavator placed logs perpendicular to the slope and dispersed stumps, light
slash, and brushweed in-between the logs.
The
southern toe of the repository was reshaped and connected to the anchor trench.
A START engineer was on site to observe and document the installation of a
French drain along a select section of the southern toe. The engineer also met
with the EPA OSC and ERRS RM to discuss and optimize drainage features on the
north side of the repository near the Mill Site, former Residence 2, and
Residence 6.
On
November 12, OSC Franklin met with Mr. Smith to review restoration efforts on
the borrow source area located behind the work trailers. The property owner
expressed satisfaction with the restoration which included grading, seeding,
and placement of slash and straw.
The
septic system was completed during the operational period. The mini-excavator
was used to dig a trench in the road for the PVC effluent line to connect the
drain field to septic tanks located at both residences. The drain field near
the property owner’s residence was covered with straw and slash.
Prior
to the current operational period, EPA and ERRS negotiated the purchase of a
manufactured home located in Klamath Falls. On November 15, one START member and
one ERRS member traveled to Klamath Falls to screen the home for mercury vapors
using the Lumex mercury vapor analyzer. The results of the survey identified
indoor air concentrations of mercury vapor similar to outdoor (background)
concentrations, approximately 15 ng/m3. For reference, the indoor
air concentration of mercury vapor for residential settings as recommended by
the ATSDR is 10,000 ng/m3.
On
November 18, the manufactured home from Eugene arrived on site and was placed
at Residence 6. This home includes 2 bedrooms, 1 bathroom, a living room, kitchen
and other amenities. The property owner, Mr. Smith, was accompanied by OSC
Liverman, ERRS and START on a tour of the home.
On
November 19, a four-person ERRS crew traveled to Klamath Falls to prepare the
second manufactured home for transport to the site. This home has 3 bedrooms, 2
bathrooms, a living room, kitchen and other amenities. On November 21st
the home arrived on site and was placed at Residence 1.
The
electric utilities were connected during the operational period. At Residence
6, the power company connected the transformer to the service pole and the
electrician placed conduit from the service pole to the home. At Residence 1,
the power company connected the transformer to the power pole.
Upon siting and placement of both residences, electrical connections were
finalized to the homes and approved by county inspectors. Telephone and septic
utilities were also connected to the residences. During this time, ERRS
installed new smoke detectors and carbon monoxide detectors, and ensured that
neither residence contained mercury thermostats. Because many original household items
were contaminated and/or could not be reclaimed, each manufactured home was
furnished with basic furniture items such as a kitchen table and chairs, couch,
and bed frames with mattresses that were purchased locally from a used
furniture store in nearby Sutherlin.
December
20, OSC Liverman and OSC Heister met with Mr. Smith to review the transfer
agreement for the manufactured homes. ERRS and START were also present for the
meeting. ODEQ Thoms arrived on site to join the discussion regarding requirements
of the MM&R plan. This plan was prepared by EPA to clearly identify the
property owner’s responsibility of maintaining, monitoring, and repairing site
features under ODEQ oversight. The MM&R plan includes tasks such as monitoring
vegetation, ditches, culverts, repository cover, and gravel backfill along with
a list potential warning signs such as heavy precipitation that may disturb the
site. The MM&R plan also described reporting requirements, best management
practices, exposure reduction measures, and precautions for digging or
subsurface work. ODEQ Thoms also described planned deed restrictions with Mr.
Smith, and expressed concern regarding open adit(s) related to the Bonanza Mine
workings on adjacent property.
ERRS
coordinated demobilization of site assets during the current operational
period. The EPA work trailer was moved off site on November 14, and the second
work trailer was moved on November 20. The 30 ton haul truck was decontaminated
and demobilized on November 15. OSC Franklin confirmed with Lone Rock Timber,
the adjacent property owner, to leave in place the gravel parking area prepared
for the work trailers. ERRS deployed seven signs at various locations throughout
the site to warn residents, visitors, and other personnel of remaining hazards
on the property.
Prior to demobilization of
personnel from the site, ERRS installed three check dams downstream of the
pond, deployed straw wattles around Area 1, and placed rock along the road in
Areas 1 and 2 for erosion control. By December 6, all EPA assets and contractor
personnel had demobilized from the site.
2.1.3 Enforcement Activities, Identity of Potentially Responsible Parties (PRPs)
EPA has initiated a PRP search for this Site.
2.1.4 Progress Metrics (as of 12/6/14)
Waste
Stream
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Medium
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Quantity
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Manifest
#
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Treatment
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Disposal
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Mercury, soil waste
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Soil
and other debris
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One 55-gallon drum
(150 lbs)
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007851712FLE
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Retirement via sulfide treatment
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Bethlehem
Apparatus Co., Hellentown, PA
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Mercury, wood debris
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Soil,
wood, and other debris
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Two
55-gallon drums
(1000 lbs)
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007851711FLE
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Macro-encapsulation
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Clean
Harbors Grassy Mountain, Grantsville, UT
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