DDW-2024-013376

November 19, 2024
Neal Winterton
Pleasant Grove City
70 South 100 East
Pleasant Grove, Utah 84062
Subject:Operating Permit, Atwood Well Chlorinator (TP003); Pleasant Grove City, System #25022, File #13281
Dear Neal Winterton:
The Division of Drinking Water (the Division) received a request for an Operating Permit for the Atwood Well Chlorinator (TP003) from your consultant, Marvin Allen and Hansen, Allen
& Luce, Inc on October 1, 2024. Final record drawings were received on October 17, 2024. The Division issued Plan Approval for this project on March 15, 2023. This project has met all
conditions for receiving an operating permit.
Our understanding of the project was adding a new separate chlorination room
addition onto the existing Atwood Well House (WS015), and in addition the installation of new gas chlorination equipment.
The Atwood Well Chlorinator (TP003)included in this project has been completed according to the following:
The Atwood Well Chlorinator (TP003) is a gas chlorinator, Regal Model 216, and Regal Series 7001.
The chlorinator will add chlorine to the water from the Atwood Well (WS015).
The chlorinated water then flows into the distribution system.
The gaseous chlorine used for disinfection meets the ANSI/NSF 60 standard.
A design target dose of 0.2 mg/L (ppm) of free chlorine is based on a typical flow of 550 gallons per minute (gpm) from the Atwood Well (WS015)
The chlorine dose is adjusted by an automatic flow-paced control rotometer.
We have received the following information for Atwood Well Chlorinator (TP003):
Certification of Rule Conformance with plan approval conditions by a professional engineer.
As-built or record drawings.
Satisfactory bacteriological results as evidence of proper disinfection and flushing.
Evidence of operation and maintenance manual delivery.
We have determined that all conditions for issuing an operating permit have been met. On this basis, an Operating Permit for Atwood Well Chlorinator (TP003) is hereby issued as constituted
by this letter. You may now place Atwood Well Chlorinator (TP003) in service in your water system.
Please maintain a copy of this letter with your permanent records for future reference.
Secondary Disinfection Requirements
The Division has determined that Pleasant Grove City must provide continuous disinfection to
maintain detectable chlorine residuals throughout the distribution system. The Atwood Well Chlorinator (TP003) is intended to provide a detectable disinfectant residual in the distribution
system for secondary disinfection. When the chlorinator is installed and placed in operation, the Pleasant Grove City Water System will be required to demonstrate ongoing compliance
with the secondary disinfection requirements that are outlined in Addendum 1 to this letter.
The Division shall be informed by telephone within 8 hours by a water supplier of the malfunction
of any disinfection facility such that a detectable residual cannot be maintained at all points in the
distribution system per R309-105-18(1)(a).
Please be aware that, if any water source of the Pleasant Grove City water systemis found to
require primary disinfection in the future per R309-200-5(7)(a)(i), additional regulations will
apply. This will include submitting disinfection CT information showing compliance with 4-log
virus inactivation in accordance with the Ground Water Rule in R309-215-16.
There may be new changes in monitoring and reporting requirements in the future as the Division continues to improve the disinfection monitoring and reporting practices. Failure to adhere
to required monitoring and reporting will result in violations and the assessment of IPS points.The issuance of this Operating Permit resolves your water system’s deficiency [or deficiencies]
related to S001. An updated IPS report isavailable at https://waterlink.utah.gov. Please contact Jennifer Yee at [phone] or [e-mail] for questions related to your water system’s
IPS report or deficiencies.
If you have any questions regarding this Operating Permit, please contact Brent Arns, of this office, at [phone], or Michael Newberry, Permitting and Engineering Support Manager,
at [phone].
Sincerely,
Russell Seeley, P.E.
Assistant Director
BA/LT/mrn/mdbcc:Jason Garrett, Utah County Health Department, [e-mail] Winterton, Pleasant Grove City, [e-mail] Larson, Pleasant Grove City, [e-mail]
Allen, Hansen, Allen & Luce, Inc, [e-mail] Yee, Division of Drinking Water, [e-mail] (if involving IPS)Chris Martin, Division of Drinking Water, [e-mail]
Treutel, Division of Drinking Water, [e-mail] Federico, Division of Drinking Water, [e-mail] Kruse, Division of Drinking Water,[e-mail] Martinez,
Division of Drinking Water, [e-mail] Arns, Division of Drinking Water, [e-mail] 25022 13281 OP Atwood TP003 Chlorinator
Addendum 1 
 Secondary Monitoring and Reporting Requirements 
Chlorine Monitoring & Reporting Requirements
The water system is required to meet secondary disinfection requirements. As a part of these requirements, the water system is required to continuously maintain a minimum free chlorine
residual at each chlorinator Point of Entry (POE) into the system and demonstrate a detectable chlorine residual in the distribution system. The Atwood Well Chlorinator (TP003) is intended
to provide a detectable disinfectant residual in the distribution system for secondary disinfection. Pleasant Grove City will be required to demonstrate ongoing compliance with the following
secondary disinfection requirements:

Secondary Disinfection Requirements and Reporting 
Chlorine Residual ‒ Point of Entry (POE) to Distribution System
The POE sampling location is identified as EP003 in the Division’s database. This location is in the well house. Maintain a minimum of 0.2 mg/L residual (measured as free chlorine) at
the POE sampling location. [R309-215-16(3)(b)(iii)(A)(I) and (II)]
The chlorine residual concentration measured at the POE sampling location shall not exceed the maximum residual disinfectant level (MRDL) of 4.0 mg/L (measured as free chlorine). [R309-200-5(3)(c)(iv)]
Record and report the lowest daily value of chlorine residual measured as free chlorine at the POE sampling location. [R309-210- 8(3)(a)(ii)]
Our records show that your water system serves 40,000 people. Please be aware that R309-215-16(3)(b)(iii)(A)(I) requires water systems serving greater than 3,300 people to continuously
monitor the POE chlorine residuals. Therefore, an online analyzer to continuously monitor the POE chlorine residuals entering the distribution system is needed.
Chlorine Residual ‒ Distribution System (DS001)
This water system must maintain a detectable residualthroughout the distribution system. It is recommended to maintain the chlorine residual above 0.1 ppm in the distribution system.
[R309-520-5]
The chlorine residual measured in the distribution system shall not exceed the maximum residual disinfectant level (MRDL) of 4.0 mg/L (measured as free chlorine). [R309-200-5(3)(c)(iv)]
This water system must take a minimum of three (3) chlorine residual samples per weekat varying locations throughout its distribution system (DS001). [R309-105-10(1)(c)]
Distribution system chlorine residuals must be taken in conjunction with total coliform sampling. [R309-215-10(3)]
Disinfection Report Submission
To demonstrate ongoing compliance with secondary disinfection requirements, the water system must complete monthly operational reports for each active chlorinator using a template approved
by the Division. 
The monthly operational reports are submitted quarterly. The reports are due to the Division by the 10th day following the end of each reporting quarter (i.e., January 10th, April 10th,
July 10th and October 10th). The reports can be submitted by hardcopy, fax, or by uploading them to the Division’s chlorine residual reporting form which can be found at MRDL.utah.gov.
Please contact Luke Treutel at [phone] or [e-mail] to schedule training regarding proper reporting.
In addition to monthly disinfection reporting, this water system must submit the monthly average of chlorine residual samples taken in the distribution system. Distribution system chlorine
residual monitoring results are due quarterly by the same compliance dates as the monthly disinfection report and can be submitted via an online form found at mrdl.utah.gov. 
Records must be maintained for a minimum of 5 years. [R309-105-17(1)]