DDW-2025-009008

September 23, 2025
Sent via Email Only
Allen Sweat
Center Creek Water System
2637 South Old Settlers
Heber City, UT 84032
[e-mail]
Subject:After-the-Fact Operating Permit, Church Farm Well Chlorinator (TP004);
Center Creek Water System, System #26002, File #25121
Dear Allen Sweat:
The Division of Drinking Water (the Division) discovered the Church Farm Well Chlorinator installed during the 2025 sanitary survey. The Division conducted a follow-up site inspection
on September 9, 2025, to evaluate the facility based on the sanitary survey questions associated with a liquid hypochlorinator. The Church Farm Well Chlorinator is identified as TP004
in the Division’s database. The facility is currently inactive and not connected to the Church Farm Well (WS004). Please notify the Division when you activate the Church Farm Well (WS004)
and Church Farm Well Chlorinator (TP004).
Our understanding of the project is that a sodium hypochlorite liquid feeder was added to the Church Farm Well (WS004). It was determined that spill containment will be required based
on the site inspection. The Church Farm Well (WS004) is intended to supply connections for new developments.
The Church Farm Well Chlorinator (TP004) included in this project has been completed according to the following:
The Church Farm Well Chlorinator (TP004) treats water from the Church Farm Well (WS004) to provide secondary disinfection and is fed a sodium hypochlorite solution of 12.5% bya Blue
and White FlexFlo M14-6T metering pump at the discharge piping within the wellhouse.
The chlorinated water then enters the 50,000 gallon tank (ST001) and 300,000 gallon tank (ST002) and flows into the distribution system. These tanks are connected and fill at the same
water elevation.
The sodium hypochlorite used for disinfection meets the ANSI/NSF 60 standard.
A design target dose of 0.5 mg/L (ppm) of free chlorine is based on a typical flow of 100 gallons per minute (gpm) from the Church Farm Well (WS004).
The chlorine dose is adjusted by a manually adjusted rotometer set for the constant flow from the Church Farm Well (WS004).
We have determined that all conditions for issuing an operating permit have been met. On this basis, an Operating Permit for Church Farm Well Chlorinator (TP004) is hereby issued as
constituted by this letter. You may now place Church Farm Well Chlorinator (TP004) in service in your water system.
Please maintain a copy of this letter with your permanent records for future reference.
Secondary Disinfection Requirements
The Center Creek Water Systemis not required to disinfect the Church Farm Well (WS004)based on bacteriological source sample results currently available. The water systemhas elected
to install the Church Farm Well Chlorinator (TP004) to provide a detectable disinfectant residual in the distribution system for secondary disinfection.
Please be aware that, if any water source of the Center Creek 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.
The Center Creek Water Systemis required to demonstrate ongoing compliance with the secondary disinfection requirements outlined in Addendum 1 of this letter as long as the Church Farm
Well Chlorinator (TP004) is in operation.
Monitoring and ReportingIssuance of this Operating Permit changes your water system’s monitoring and reporting requirements. The staff of the Rules Section will follow up to provide
an updated monitoring schedule to you. Please contact Mark Berger, Water Quality/Monitoring and Standards Manager at [phone] for questions regarding the monitoring and reporting
requirements for your water system.
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.
If you have any questions regarding this Operating Permit, please contact Chris Martin, P.E., of this office, at [phone], or Michael Newberry, P.E., Permitting and Engineering
Support Manager, at [phone].
Sincerely,
Russell Seeley, P.E.
Assistant Director
CMM/mrn/mdbcc:Tracy Richardson, Wasatch County Health Department, [e-mail] Hastings, Wasatch County Health Department, [e-mail] Allen Sweat,
Center Creek Water System, [e-mail] Cobleigh, P.E., Division of Drinking Water, [e-mail] Martin, P.E., Division of Drinking Water, [e-mail]
Treutel, Division of Drinking Water, [e-mail] (if involving disinfection/DBP)Jennifer Yee, Division of Drinking Water, [e-mail] (if involving IPS)CMartin 26002 25121 TP004
OP - Church Farm Well Chlorinator
Addendum 1 
Elective Monitoring and Reporting Requirements 
Chlorine Monitoring & Reporting Requirements
The water system is required to meet elective 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. 
Elective Disinfection Requirements and Reporting 
Chlorine Residual ‒ Point of Entry (POE) to Distribution System
The POE sampling location is identified as EP004 in the Division’s database. This location has been identified as the discharge piping for the well pump. 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 chlorine residual concentration, measured as free chlorine, at thePOE sampling location (EP004). [R309-215-10(1)].

Our records show that your water system serves 270 people. Please be aware that R309-215-16(3)(b)(iii)(A)(II) requires water systems serving 3,300 people or fewer to monitor the POE
chlorine residuals and take daily grab sample(s). Alternatively, instead of taking daily grab samples, a groundwater system serving 3,300 or fewer people may choose to use an online
analyzer to continuously monitor the POE chlorine residuals entering the distribution system.
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)]