DDW-2024-011329

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
September 17, 2024

John Cazier Diamond Valley Acres Water Company 1618 West Diamond Valley Drive St George, Utah 84770

Dear Mr. Cazier, Subject: RTCR Level 2 Assessment Diamond Valley Acres Water Co UTAH27065
I would like to thank you for taking the time to meet with me on June 12th, and August 29th,
2024, for Level 2 Assessments (L2) of your water system. Your willingness to accommodate this request is greatly appreciated. Observations:

These site visits were triggered by multiple TC+ EC+ Escherichia Coli (E. Coli) samples at different locations throughout your distribution system.
Conclusions: 1. TC + EC + samples could be caused by stagnant water/old water age in both your storage tanks and your aging distribution system. Storage tanks are above ground steel tanks with dark exterior paint, this can also contribute to elevated water temperature compounding the
stagnant process.
2. Another potential cause could be poor water quality and/or a bacteria growth problem from your well sources. Insufficient source sample data to either confirm or eliminate wells as the problem currently. 3. Based on the history of TC+EC+ samples, Division of Drinking Water (DDW)
Vulnerable Source Assessment team (VSA) has determined Diamond Valley Acres Water System will be required to disinfect their water system. (An official letter/order to follow)
John Cazier Page 2
September 17, 2024
Recommendations:

1. Follow the VSA Ground Water Required to Disinfect (GWRTD) order in installing disinfection. Work with District Engineer Paul Wright on approvals and Operating Permits.

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]