DDW-2024-009284

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

July 12, 2024

David Hewett
Mid Valley Estates
4819 N 2800 W
Cedar City, Utah 84720

Dear Mr. Hewett,

Subject: RTCR Level 2 Assessment Mid Valley Estates UTAH11015

Thank you for meeting with me on May 23, 2024, to conduct the Level 2 Assessment (L2) of your
water system. Your cooperation in facilitating this assessment is greatly appreciated.

Observations:
The assessment was prompted by two Level 1 assessments within a 12-month period, which
included routine and repeat Total Coliform Positive (TC+) samples collected in October 2023 and
February 2024.
Mid Valley Estates is a residential subdivision with 245 service connections. The system includes
an emergency connection from 11085, two wells for source supply, three above-ground steel storage
tanks, and pump stations to pressurize the distribution system. The distribution system comprises
6-inch PVC mainlines with fire hydrants distributed throughout.
Conclusions:
1. The TC+ samples are likely due to stagnant water and aging water in the storage tanks and
distribution system. The system is looped but includes several short dead-end stubs, which
may exacerbate the issue.
2. Another potential contributing factor is the presence of silt and sand in the storage tanks.
3. Sampling from locations on dead-end mains may also contribute to TC+ sample results.
Deficiencies:

No deficiencies were assigned during this assessment.
David Hewett
Page 2
July 11, 2024

Recommendations:
1. Inspect and Clean Storage Tanks Regularly: Perform routine inspections and cleanings
of the storage tanks. Disinfect the tanks according to AWWA C651 standards as part of your
operations and maintenance (O&M) procedures.
2. Distribution System O&M: Conduct disinfection and flushing of the distribution system
in accordance with AWWA C651 standards.
3. Revise RTCR Sample Site Plan: Update the RTCR sample site plan to exclude sampling
sites located at the ends of the system and submit the revised plan to the Division of Drinking
Water (DDW).
4. Implement Unidirectional Flushing Program: Initiate a unidirectional flushing program
with a goal of achieving a flushing velocity of 2.5 feet per second. For assistance, contact
the Rural Water Association of Utah.
5. Follow Sanitary Sampling Protocol: Ensure that sampling locations are properly flushed
and disinfected using a strong chlorine-based solution. This includes applying the solution,
allowing adequate contact time, flushing the site, and collecting the sample.
Contact Rural Water Association of Utah for Further Technical assistance or questions on
flushing/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
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]
Jeremy Roberts, Southwest Utah Health Department, [e-mail]
Paul Wright P.E., DEQ DE, [e-mail]

David Hewett
Page 3
July 11, 2024