HomeMy WebLinkAbout952006.tiffSTATE OF COLORADO
Roy Romer, Governor
Patti Shwayder, Acting Executive Director
Dedicated to protecting and improving the health and environment of the people of Colorado
4300 Cherry Creek Dr. S.
Denver, Colorado 80222-1530
Phone (303) 692-2000
August 30, 1995
Laboratory Building
4210 E. 11th Avenue
Denver, Colorado 80220-3716
(303) 691-4700
Weld County Board of Commissioners
915 10th Street
Greeley, Colorado 80632
Re: Disposal of Soil from CSMRI-Creekside Site
Laidlaw's Denver Regional Landfill (South)
Weld County, Colorado
Dear Commissioners:
Colorado Department
of Public Health
and Environment
This letter is for your review and consideration regarding Laidlaw's Denver Regional Landfill
(South) disposal facility located in Weld County, near Erie, Colorado. Laidlaw must obtain
written approval from both Weld County and the Colorado Department of Public Health and
Environment for the receipt and final disposal of the material in Laidlaw's August 1, 1995
proposal and supplemental information dated August 24, 1995.
The Radiation Control Division has reviewed Laidlaw's August 1, 1995 proposal and
supplemental information dated August 24, 1995, to transfer radioactive material, for final
disposal, from the Colorado School of Mines Research Institute - Creekside Site to Laidlaw's
Denver Regional Landfill (South) facility located in Weld County, near Erie, Colorado. The
material in Laidlaw's proposal are the contaminated stockpiled soils which are subject to the U.S.
Environmental Protection Agency's Unilateral Administrative Order No. CERCLA-VIII-95-06;
hereafter referred to as the "CSMRI-Creekside stockpiled soils". The volume of the CSMRI-
Creekside stockpiled soils has been estimated to be approximately 20,000 cubic yards.
Both the Radiation Control Division and the Hazardous Materials and Waste Management
Division's Solid Waste Section have reviewed Laidlaw's proposal and supplemental information.
The CSMRI-Creekside stockpiled soils require "special approval" for final disposal at a facility
such as Laidlaw's Denver Regional Landfill (South).
The Radiation Control Division's review has determined that:
1. the CSMRI-Creekside stockpiled soils have been adequately characterized by the U.S.
Environmental Protection Agency and the State of Colorado;
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Weld County Commissioners
August 30, 1995
Page 2 of 3
2. the CSMRI-Creekside stockpiled soils are not low-level radioactive waste, therefore the
materials are not subject to the specific disposal requirements contained in Part 14 of the
Colorado Rules and Regulations pertaining to Radiation Control (6 CCR 1007-1); and
3. the handling and disposal procedures and commitments on the part of Laidlaw meet the
human health and environmental standards for protection against radiation contained in
Part 4 of the Colorado Rules and Regulations pertaining to Radiation Control (6 CCR
1007-1), and are therefore acceptable with the following condition:
a. The U.S. Environmental Protection Agency and/or the State of Colorado may
require different methods to physically separate the CSMRI-Creekside stockpiled
soils from other waste in the disposal cell. Laidlaw shall work with the U.S. EPA
and the State of Colorado to develop a mutually agreed upon waste
separation/segregation plan.
Laidlaw's risk assessment evaluation indicates that an extremely low exposure associated with
this operation would be to occupants if residences were allowed on the site after closure of the
landfill operation. To prevent possible exposure, the recorded notation on the deed required
under Subsection 3.4.1 of the Colorado Solid Waste Regulations (6 CCR 1007-2) shall include
a restriction that the site may not be developed for residences. Also, in accordance with
Subsection 3.6.1(A)(7), post -closure use of the property shall not disturb the integrity of the
landfill containment and monitoring systems.
Based upon our technical and regulatory reviews, the Radiation Control Division and the
Hazardous Materials and Waste Management Division recommend that Laidlaw's Denver
Regional Landfill (South), located in Weld County, be approved with the above stated conditions
for the one-time special approval to receive and dispose of the CSMRI-Creekside stockpiled soils.
We do not believe that an amendment to Laidlaw's Certificate of Designation is necessary for
the one-time special approval of this material.
Please note that the Colorado School of Mines Research Institute ("CSMRI"), under their
Colorado Radioactive Materials License #617-01, must obtain authorization from this Department
to transfer the material from their facility to another. Should CSMRI elect to transfer this
material to Laidlaw's Denver Regional Landfill (South), additional coordination regarding
pending issues (e.g., transportation, air monitoring, final procedures, etc.) will need to be
conducted between Laidlaw and this Department and the U.S. Environmental Protection Agency.
Weld County Commissioners
August 30, 1995
Page 3 of 3
If you have any questions or need further information regarding this recommendation, please
contact either Roger Doak (CDPHE-HMWMD) at 692-3437 or Greg Brand (CDPHE-RCD) at
692-3064.
Sincerely,
Mallory
lean F. Mallory
Solid Waste Section Chief
Hazardous Materials & Waste Management Division
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Donald H. Simpson
Uranium & Special Projects Unit Leader
Radiation Control Division
cc: Weld County Planning Department
Trevor Jiricek, Weld County Health Department
Rick Hoffman, Laidlaw Waste Systems, Inc.
Brenda Lenz, Laidlaw Waste Systems, Inc.
Ben Doty, Doty & Associates
Mike Zimmerman, U.S. EPA - Region VIII
Suzanne Bohan, U.S. EPA - Region VIII
Asimakis Iatridis, Colorado School of Mines
Rick Brown, CDPHE - HMWMD
Gultekin Savci, Steffen Robertson and Kirsten
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