CIWMB’s Solid Waste Information System (SWIS) number: 45-AA-0014
Site Information per
Landfill Facility Compliance Study (Task 2)
Closed before 1993Information Source:
Owner/Operator: Shasta County Department of Public Works
Telephone conversation: April 12, 2004
The landfill consists of two units that were both closed prior to the
enactment of Subtitle D. One unit is classified as a former burn dump,
and the other is a sanitary landfill. During groundwater monitoring at
this site, volatile organic compounds (VOC) and some metals were
detected in the groundwater. As a result, the owner is conducting a
corrective action program (CAP). Since VOCs and metals are not typically
released from burn dumps, the CAP is focused on the sanitary landfill
unit.
In the summer of 2002, a geomembrane engineered alternative cap was
constructed over the sanitary landfill unit. The cover consisted of a
cushion soil layer, a vented geomembrane layer, and a vegetative layer.
The geomembrane was selected over a low-permeability soil layer due to
the unavailability of a suitable clay borrow source. In addition, the
CAP includes re-grading the cover of the burn dump unit to reduce the
potential for ponding and infiltration. During the process of selecting
the CAP, the owner found the requirements of Title 27 useful and
detailed.
Since the beginning of the study period (January 1, 1998), the EA has
not issued any areas of concern (AOC) or violations for gas-related or
leachate control standards in Title 27 of the California Code of
Regulations (27 CCR). There have been no landfill gas or surface water
compliance issues at this site.
Information Source: Central Valley Regional Water Quality Control
Board
Telephone conversation: April 8, 2004
E-mail response: April 20, 2004
The site was closed in 1982, prior to the adoption of the current 27
CCR regulations governing closure of landfill.
Detections in the groundwater monitoring network showed increased
total dissolved solids (TDS), metals, nitrates, and VOCs, in addition to
salts, as indicators of a release from the landfill. The RWQCB requested
the owner to initiate an evaluation monitoring program (EMP) and a
corrective action program (CAP) in a September 2000 letter. A
geomembrane cap was selected as the corrective action measure for the
sanitary landfill unit. The CAP began after January 2002 (the ending
date of the Task 2 cross-media inventory). The geomembrane cover was
constructed in 2002. The cover incorporates a passive landfill gas (LFG)
venting system to minimize LFG pressure build-up under the geomembrane.
In addition, the groundwater monitoring program has been expanded as
part of the CAP. Since the cover construction was recently completed,
there is insufficient data to demonstrate whether the CAP is working.
The other portion of the landfill is graded and vegetated properly to
minimize infiltration and erosion.
The process of going from a detection monitoring program (DMP) to an
EMP to a CAP was fairly smooth; however, the time constraints required
by Title 27 were found to be unrealistically short and a site-specific
extension was written into the revised waste discharge requirements (WDR).
According to the RWQCB, aside from the recently constructed final
cover system, there have been no additional groundwater protection
measures implemented at the site that are beyond the regulatory
minimums. Groundwater related regulations have not been overly
difficult, costly, or confusing to implement at the Buckeye Landfill.
Information Source: Enforcement Agency—Shasta County Department of
Resource Management, Division of Environmental Health
Telephone conversation: April 8, 2004
Since the beginning of the study period (January 1, 1998), the EA has
not issued any AOCs or notices of violation at this site for 27 CCR’s
gas-related, leachate control, or drainage and erosion control
standards. There have been no additional gas control, leachate control,
or drainage and erosion control measures taken at the site beyond the
regulatory minimums, and the gas- and surface water-related regulations
have not been overly difficult, costly, or confusing.
The new cap constructed over a portion of the Buckeye Landfill has
been beneficial in keeping the site in compliance with the surface
water-related standards.
Information Source: Shasta County Air Quality Management District
E-mail response: April 15, 2004
The Shasta County Air Quality Management District does not require
permitting, monitoring, reporting, or inspection data from this site.
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