CIWMB’s Solid Waste Information System (SWIS) number: 18-AA-0009
Site Information per
Landfill Facility Compliance Study (Task 2)Information Source:
Owner/Operator—U.S. Bureau of Land Management and Lassen Regional Solid
Waste Authority
Telephone conversation: April 6, 2004
Since January 1998, the regional water quality control board (RWQCB)
has not required the owner to conduct a corrective action program or
come under a water-related cleanup and abatement order; however, the
RWQCB has required that the owner install new replacement groundwater
monitoring wells when the existing wells become dry. The owner indicated
that the volatile organic compound (VOC) monitoring requirements can be
confusing.
In the past few years, the owner has also employed two waste checkers
to screen for hazardous wastes in the incoming waste stream.
With regard to surface water protection and gas control, no
additional measures have been taken at this site that are beyond the
minimum regulatory standards.
There have been no gas-related or surface water-related regulations
that have been overly difficult or costly to implement. Likewise, there
have been no gas-related or surface water-related regulations that have
been too confusing (or contradictory) to be implemented or enforced at
this site.
Information Source: Lahonton Regional Water Quality Control Board
Telephone conversation: April 6, 2004
E-mail response: April 8, 2004
The underlying groundwater conditions at this site are complex due to
a fault zone that runs through the cell. The groundwater is 40 to 50
feet deeper on one side of the fault zone relative to the other side. As
such, the owner has been required to install more monitoring wells than
would have otherwise been required. As there have been no detections of
a release since the beginning of the study period (January 1, 1998), the
owner has not been required to conduct a corrective action program or
come under a water-related cleanup and abatement order.
The site has one monitoring location for monitoring moisture in the
vadose zone that was installed outside the waste footprint. The owner
conducts periodic vadose zone monitoring in order to detect the earliest
possible release in accordance with the site’s monitoring program.
However, because this lysimeter was installed after the landfill was
constructed, it is located on the perimeter of the waste cell (not below
waste). Therefore, this lysimeter may not be effective in detecting a
release. Ideally, vadose zone monitoring should consist of a monitoring
point below the waste (or below the liner in the case of a lined unit);
but at unlined sites where lysimeters are installed on the perimeter of
the landfill, monitoring for moisture in the vadose zone may not be
effective. Also, trying to retrofit a lysimeter below an operating cell
of landfill lined or unlined may not be practical.
The RWQCB has not allowed well purge water to be discharged back into
the cell because it is unlined and there is no leachate collection and
removal system. While the regulations in Title 27 of the California Code
of Regulations specifically discusses recirculation of leachate, there
is no specific discussion of how well purge water should be handled.
Enforcement Agency: Lassen County Health Department
E-mail response: April 5, 2004
Since January 1, 1998, there have been no areas of concern (AOC) or
violations of gas-related standards of the Title 27 regulations
(sections 20919 [Gas Control], 20919.5 [Explosive Gases Control], 20921
[Gas Monitoring and Control During Closure and Postclosure, or 21160
[Gas Control/Leachate Contact]).
There are no receptors of any kind within one mile of this landfill.
The landfill is surrounded by high desert sagebrush, and the geology of
the site is not conducive to migration of gas. If the landfill did
generate significant gas (although the arid climate limits generation),
and if the gas did migrate, there would be no environmental or public
health and safety impacts or concerns. Monitoring for off-site landfill
gas migration has no tangible benefits at this site.
Since January 2002, the EA has issued a couple of AOCs in the
winter/spring for erosion on intermediate fill/cover areas that has
created rills and small gullies that could potentially deepen and expose
waste. The operator repaired these areas in the spring/summer of 2002.
No additional gas control, leachate control, drainage and erosion
control or surface water-related protection measures have been
implemented at this site beyond the regulatory minimums.
Information Source: Lassen County Air Pollution Control District
The Lassen County Air Pollution Control District (APCD) has nothing
in its files concerning permits, monitoring, reporting, inspections, or
violations for this site. As such, Lassen County APCD was not initially
contacted, but was later contacted several times for review and comment
of the in-depth information as it was being developed.
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