DDW-2025-000013

195 North 1950 West • Salt Lake City, UT Mailing Address: P.O. Box 144830 • Salt Lake City, UT 84114-4830 Telephone [phone] • Fax [phone] • T.D.D. [phone]
www.deq.utah.gov Printed on 100% recycled paper
State of Utah

SPENCER J. COX Governor DEIDRE HENDERSON Lieutenant Governor
Department of Environmental Quality
Kimberly D. Shelley Executive Director DIVISION OF DRINKING WATER Nathan Lunstad Ph.D., P.E. Director
December21, 2024

David Griffin Highland City 5400 Civic Center Dr STE 1 Highland, Utah 84003-3856

Dear Mr. Griffin, Subject: RTCR Level 2 Assessment Highland City UTAH25014
I would like to thank you for taking the time to meet with me on November 6th, 2024, for a Level
2 Assessment (L2) of your water system. Your willingness to accommodate this request is greatly appreciated. Observations:
This site visit was triggered by multiple Routine and Repeat TC+ EC- distribution system samples July, August, September 2024. Triggered source samples were TC-EC- during these events. System indicated these TC+ samples were taken from a pressure zone with a large storage tank,
supplied from a booster pump station. Pressure zone does not use enough water to give the tank a
good turnover ratio. System indicated one of the TC+ samples was collected on a service connection off a small 4” steel mainline. Operators have checked water temperature during these 3 months of TC+ sample and recorded
warm temperatures during this timeframe.
Conclusions:
1. TC + Routine & Repeat samples in the distribution system are likely caused by Stagnant
Water (old water age) in your distribution system, pressure zones and Tanks. 2. Highland City has a pressurized Irrigation System which off sets water usage during the late summer months where water temperature increases and makes bacteria growth more prevalent.
David Griffin Page 2
December 21, 2024
3. Old steel mainlines which are small (4”) are prone to corrosion (rust) which will cause TC+ samples.
Recommendations: Install Chlorination as planned at 3 of your well sources. 1. Complete a revised RTCR sample site plan, assigning sites that are not at the end of the
system and submit to DDW.
2. Avoid sampling on old steel mainlines. Unless extensive flushing prior to collecting the samples.
3. Conduct an O & M disinfection and flushing of system, following AWWA C-651
standards. 4. Monitor water usage in pressure zones and flush as needed to avoid stagnant water issues.

5. Inspect and Clean Storage Tanks on a regular basis, Disinfect as per AWWA C652 standards as an O& M procedure if possible.
Contact Rural Water Association of Utah for Further Technical assistance or questions on
sampling procedure: Terry Smith 435-691-0691 [e-mail] Feel free to contact me at [phone] or [e-mail], with questions or if we can be of
further assistance.
If you have any questions regarding the work performed, please contact Field Services Section manager, Ryan Dearing, at [e-mail] [phone].
Sincerely,
Brian Pattee Environmental Scientist III
Utah Division of Drinking Water
cc: Brian Pattee, Division of Drinking Water, [e-mail] Sitara Federico, Division of Drinking Water, [e-mail] Daymon Swenson, Utah County Health Department, [e-mail] Brent Arns, DDW Engineer, [e-mail] Chris Martin, DDW Engineer, [e-mail]
David Griffin Page 3
December 21, 2024