DWQ-2025-003298

April 10, 2025
Kirk Thornock
UDOT Region 4 Director
210 West 800 South
Richfield, UT 84701
Subject: UDOT Tropic Station MS4 Improvements Approval to Use
Dear Mr. Thornock:
The Division of Water Quality (“Division”) issued a Construction Permit for theMS4 Improvements for the UDOT Tropic Station on February 25, 2022. During the construction in July 2022
the Division completed an inspection on July 13, 2022 of the pond before the liner was put into place. On July 15, 2022 an inspection was performed of the liner placement and the pouring
of a concrete pad. A final inspection was not performed at that time.
The work has now been completed and a final inspection was completed on April 7, 2025. With the help of Donna Beagley, I was recently provided with access to ProjectWise and am now
able to look at the various testing and inspections for this project. However, the testing completed during liner placement was not included in ProjectWise. This was provided by Paul
Stanworth of H2J Liners LLC (H2J) on February 17, 2025.
Based on the final inspection, the review of theconstruction documentation in ProjectWise,and the liner placement testing documentation provided by H2J; DWQ approves the use of theUDOT
Tropic StationMS4 Improvements.
If you have any questions about this letter please contact me at [phone] or [e-mail].
Sincerely,
Woodrow W. Campbell, P.E.
Environmental Engineer
Ground Water Section
WWC/DLB/
cc: Via EmailJohn Chartier, DEQ District EngineerEric Larsen, Central Utah Public Health DepartmentKirk Thornock, UDOT ([e-mail])Donna Beagley, UDOT ([e-mail])Tanya
Hibler, UDOT ([e-mail])Jake Nelson, UDOT ([e-mail])Rhonda Thiele, UDOT ([e-mail])Lief Condie, Sunrise Engineering ([e-mail])Paul Stanworth,
H2J Liners LLC ([e-mail])Matt Johnson, H2J Liners LLC ([e-mail])