DSHW-2024-008045

August XX, 2025
John Angell, Public Works Director
Summit County
1755 South Hoytsville Road
Coalville, UT 84017
RE:Cell #2 Construction Approval, Three Mile Canyon Landfill, Summit CountySW205
Dear Mr. Angell:
On August 14, 2024, the Division of Waste Management and Radiation Control (Division) received the Summit County Three Mile Landfill Cell #2Construction Plans and Specifications (Project
Manual)for the Three Mile Canyon Landfill (document DSHW-2024-007814). We appreciate the information provided during our review of the Project Manual. The Division has completed its
review of the proposed Cell #2 construction plans in the Project Manual.
Based our review, the construction of Cell #2 is approved as outlined in the Project Manual. This approval is contingent upon meeting the specifications as outlined in the Project Manual.
A qualified independent and impartial third party should serve as quality assurance and quality control and should be present on-site during landfill cell preparation and construction
to observe the delivery of rolled liner material including proper care and placement on a ground-based support during supply staging with no ground contact. Earthwork, including compaction
on all components of the cell, must adhere to appropriate industry and ASTM standards. Finished subgrade surfaces must be free of rocks larger than 3/8-inch and angular rocks and sharp
objects before liner is placed down. Destruction testing of the HDPE material requires four of five coupon samples to achieve 120 lb/in in the shear test and 91 lb/in in the peel test.
The fifth coupon requires 80% of the above values in both shear and peel tests. Gravel rock material used to surround leachate piping should be analyzed at an qualified off-site laboratory
and successfully pass the limestone test of <12% (of carbonate medium) for it to be acceptable. Please have on hand the carbonate lab documentation results prior to use.
During Cell #2 construction, periodic inspections may be conducted by the Division or the Summit County Health Department. These inspections may cover the entire facility, cell construction
or any other part of the facility operation covered by the current permit and applicable solid waste rules.
Before receiving waste into Cell #2, an as-built report of the final construction must be submitted to the Division for review and approval.A final inspection of the new cell must also
be conducted by the Division.
If you have any questions, please call Matt Sullivan at [phone].
Sincerely,
Douglas J. Hansen,Director
Division of Waste Management and Radiation Control
DJH/MBS/wa
c:Phil Bondurant, Health Director, Summit County Health Department
Nathan Brooks, Environmental Health Director, Summit County Health Department