DDW-2024-012170

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
Director

September 30, 2024

Daren Rigtrup
Rigtrup Egg Farm Processing Plant
PO BOX 60
Elberta, Utah 84626

Dear Mr. Rigtrup,

Subject: RTCR Level 2 Assessment Rigtrup Egg Farm Processing Plant
UTAH25179

I would like to thank you and Melanie Johnson for taking the time to meet with me on September
17, 2024, for a Level 2 Assessment (L2) of your water system. Your willingness to accommodate
this request is greatly appreciated.

Observations:

The initiation of this L2 assessment stems from the detection of multiple Total Coliform positive
(TC+) results in routine samples, along with repeated revised
Total Coliform Rule (RTCR) requirements samples, during July 2024.
Rigtrup Egg Farm Processing Plant is a Transient Non-Community type water system located in
Utah County.
The system consists of a Well #5 WS003 and a 16,000 gallon Wet Well (ST001)
While performing this L2 assessment it was noticed we looked over the systems bacteriological
sample reports and the data is clear that the well source is absent of coliform but once it goes
through the tank the system picks up the coliform bacteria.

Conclusions:

A potential contributor to the presence of Total Coliforms (TC+) in the samples may be a
malfunctioning backflow assembly. The backflow assembly between the chicken water tank and
the drinking water tank has not been tested. Additionally, the sample line in the back room is
supplied by a small copper line located in a very warm environment near the egg wash area. These
conditions may facilitate contamination of the samples by dust or other particles from the eggs.
Daren Rigtrup
Page 2
September 30, 2024

Recommendations:

1. We recommend having all backflow prevention assemblies tested regularly to ensure they
are functioning properly and in compliance

2. It is advisable to conduct periodic disinfection and flushing of the tanks and distribution
system in accordance with American Water Works Association (AWWA) C651 standards,
with a minimum frequency of once per year.

3. Additionally, we suggest collecting water samples from the faucet in the Break Room on
the second level, rather than from the warm room near the egg wash area.

For engineering questions and review, contact Michael Newberry at [phone],
[e-mail].

Feel free to contact me Tom McOmie 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 Assessment
Response Section manager, Ryan Dearing, at [e-mail] [phone].

Sincerely,

Tom McOmie
Environmental Scientist
Utah Division of Drinking Water

cc:
Brian Pattee, Division of Drinking Water, [e-mail]
Sitara Federico, Division of Drinking Water, [e-mail]
Mz. T Allen, Division of Drinking Water, [e-mail]
Daymon Swenson, Utah County Health Department, [e-mail]