DDW-2024-006475

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 P.E.
Director

March 5, 2024

Hayden White
Enoch City Water System
900 E MidValley RD
Enoch, Utah 84720

Dear Mr. White,

Subject: RTCR Level 2 Assessment Enoch City Water System UTAH11004

I would like to thank you for taking the time to meet with me on February 28th, 2024, for a Level 2
Assessment (L2) of your water system. Your willingness to accommodate this request is greatly
appreciated.

Observations:

This visit was triggered by multiple L2 assessments from September 2023 through December
2023.
You indicated December 2023 sampling issues were caused by a well being turned into the system
without being flushed to waste for a period, causing TC+EC- samples throughout the area served
by this well.
Enoch water system has installed chlorinators at every well source and is waiting for DDW
approval to start operating these chlorinators.

Conclusions:

1. TC + samples were likely caused by stagnant water in the well not being flushed to waste
at start up.

2. Another potential cause could be a bio film build up in your tanks and distribution system.

Hayden White
Page 2
March 5, 2024

Recommendations:

1. Initiate a 3-minute minimum flush to waste for all wells either through SCADA system or
with an SOP if FTW is manual actuated.

2. Maintain .3 to .6 mg/l of Free Chlorine Residual in the distribution system at all times
when chlorinators become operational.

3. Initiate a Unidirectional System/Hydrant flushing program on a periodic basis, with a goal
of achieving a 2.5 ft per second flushing velocity.

4. Inspect and Clean Storage Tanks on a regular basis.

5. Bacteriological Samples: Follow sanitary sampling protocol of sufficient flushing and
disinfection, using a strong chlorine-based solution (applying, allowing contact time,
flushing, sample collection).

Contact Rural Water Association of Utah for Further Technical assistance or questions on
flushing/sampling procedure: Terry Smith 435-691-0691 [e-mail]

For permitting/engineering questions and review, contact Michael Newberry at [phone],
[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
Utah Division of Drinking Water

Enclosures: Assessment Report
cc:
Brian Pattee, Division of Drinking Water, [e-mail]
Sitara Federico, Division of Drinking Water, [e-mail]
Paul Wright, DEQ District Engineer, [e-mail]
Jeremy Roberts, Southwest Utah Health Department, [e-mail]

Hayden White
Page 3
March 5, 2024