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CiOVetDOi Main Building, Denver
,y' oy yam, i , r - (303)322-9076
PATRICIA A. NOLAN, MD, MPH Ptarmigan Place, Denver
(303)320.1529
Executive Director First National Bank Building, Denver
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• Hazardous Materials and Waste Management Division Grand Inaction Office
COLORADO
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COL(IYRADO Denver, Colorado 80220-3716 _ _ Pueblo Office
DEPARTMENT
(303)3314830/FAX(303)331-4401 (719)543-8441
OFSHEALTH
April 28, 1992 Certified Mail No. P 533 510 858
Rick Hoffman
Laidlaw Waste Systems, Inc.
1441 Weld County Road 6
P.O. Box 320
Erie, Colorado 80516
RE: Amended Design and Operations Plan
Denver Regional Landfill (South)
Weld County, Colorado
Dear Mr. Hoffman:
The Hazardous Materials and Waste Management Division (the
Division) of the Colorado Department of Health has completed its
review of the Amended Design and Operations Plan for the Denver
Regional Landfill (South) .
The review of the Amended Design and Operations Plan is performed
under the authority of the "Solid Waste Disposal Sites and
Facilities Act, " Title 30, Article 20, Part 1 of the Colorado
Revised Statues, as amended (the Statute) , and the "Regulations
Pertaining to Solid Waste Disposal Sites and Facilities. " The
Regulations were adopted for the implementation of the Statute and
are contained in the Colorado Code of Regulations, 6 CCR 1007-2
(the Regulations) . The intent of the Amended Plan is to provide
the revised site characterization, revised design and operations
plan for the Denver Regional Landfill (South) expansion. The
expansion area is contained wholly within the existing Certificate
of Designation area. The Division views this application as a
substantial change in operations, meaning a redesign or planned
construction which would significantly change the planned design
performance of the facility as originally designated. A
substantial change of the planned design or construction of the
solid waste facility necessitates the submittal of an amendment to
the Design and Operations Plan, and a Division technical review.
Based on the information contained within the Amended Plan and the
subsequent amendment to the Plan, the Division finds that the site
meets the minimum standards of the Solid Waste Statute and
Regulations with the inclusion of the following recommendations.
The Division requests that these recommendations be incorporated in
PLo J5\j0
ID ` 921268
Rick Hoffman
Denver Regional Landfill (South)
April 28, 1992
page 2/3
the Amended Design and Operations Plan for the Denver Regional
Landfill (South) .
The recommendations are:
1. All health laws, standards, rules and regulations for the
Department, Water Quality Control Commission, Air
Pollution Control Commission and applicable zoning laws
and ordinances shall be complied with.
2. One or more faults may traverse the proposed site. The
Division wishes to be kept apprised of fault location and
conditions discovered during excavation. The Division
may request permeability evaluation of the fault and/or
additional monitoring.
3 . If perched water conditions are encountered during
excavation activities, the Division shall be notified
within four working days. The Division may request that
contingency plans be developed by the operator to
mitigate perched conditions.
4. A certification report shall be prepared by the Applicant
and reviewed by the Division prior to commencing with
landfilling in the lined portion of any cell. The report
shall provide written evidence that the quality assurance
plan was implemented and the construction was performed
in conformance with the design criteria, the project
plans and specifications.
5. Appendix A of the Amended Design and Operations Plan
specifies that non-destructive seam testing will
performed; however the testing method and frequency of
testing was not defined. The testing method and
frequency shall be specified for the site and submitted
to the Division for review and approval.
If during the excavation, ongoing activities and monitoring of the
site, information is revealed that changes the currently held
concept of the site, the Division may request modifications to the
design and operations, and monitoring program. In addition,
regulatory changes that the Division may implement in the future
may also become binding and necessitate modifications to design and
operations plans.
The Division cannot specifically require closure and post-closure
Rick Hoffman
Denver Regional Landfill (South)
April 28, 1992
page 3/3
financial assurances. The inclusion of financial assurances as
commitments for the owner and operator of the site is recommended.
The Division requests written concurrence by the Applicant on all
recommendations outlined above. Please contact Austin Buckingham
at this office if you have any questions regarding the Divisions'
recommendation for approval.
Sincerely,
Austin N. Buckingham Glenn Mallory
Geologist Unit Leader
Solid Waste and Incid t Solid Waste and In ident
Management Section Management Section
Hazardous Materials and Hazardous Materials and
Waste Management Division Waste Management Division
cc: B. Doty, Doty and Associates
S. Hahn, Town of Erie
D. O'Sadnick, Golder Associates, Inc.
J. Pickle, Weld County Health Department
S. Schreiber, Laidlaw Waste Systems, Inc.
K. Schuett, Weld County Department of Planning
Weld County Commissioners
file: SW/WLD/LAI South
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