DDW-2025-008133

August 28, 2025
Sent via Email Only
Cory Madsen
Spring City Water System
353 South 300 East
Spring City, Utah [e-mail]
Subject:Operating Permit, Spring City Culinary Water Improvement Project 2024, Canyon Tank (ST004), Canyon Chlorinator (TP002); Spring City, System #20008, File #13639 & 13640, SRF #3F1926

Dear Cory Madsen:
The Division of Drinking Water (the Division) received a request for an Operating Permit for the Spring City Culinary Water Improvement Project 2024 from your consultant, Jason Brimhall
with Sunrise Engineering on August 14, 2025. The Division issued Plan Approval for this project on March 28, 2024. DEQ Central District Engineer, John Chartier, conducted a final inspection
of this project on August 12, 2025. This project has met all conditions for receiving an operating permit.
Our understanding of the project was that approximately 10,000 feet of distribution piping along with the associated isolation valves, fire hydrants, and service connections have been
replaced within the existing distribution system. The Upper South Well (WS006) and the Artesian Well North (WS007) had the submersible pumps replaced and new meters put in the well discharge
piping at each well. A new 500,000-gallon concrete tank, Canyon Tank (ST004), has been constructed east of town adjacent to the Spring City Canyon Road and a new gas chlorinator, Canyon
Chlorinator (TP002), has been constructed immediately upstream of the new Canyon Tank. Canyon Tank is identified as ST004, and Canyon Chlorinator is identified as TP002 in the Division’s
database.
The Upper South Well (WS006) new pump rate is 100 gallons per minute (gpm) and the Artesian Well North (WS007) new pump rate is 120 gpm.
The Canyon Chlorinator (TP002)included in this project has been completed according to the following:
The Canyon Chlorinator is a gas chlorinator to provide elective secondary disinfection.
This chlorinator adds chlorine to the water from WS001, WS002, WS003, WS004, WS006, WS008 and WS009.
This chlorinator is intended for elective disinfection as preventative maintenance in the distribution system.
The chlorinated water goes directly to Canyon Tank (ST004) and then to Upper Zone East Tank (ST003) and Upper Tank (ST002) and then into the Distribution System (DS001)
The gas chlorination for disinfection meets the ANSI/NSF 60 standard.
The target dose of 0.5 mg/L or ppm (measured as free chlorine) is based on an average flow of 110 gpm from the Spring Sources.
The chlorine dose is adjusted by an automatic flow-paced control that will match the chlorine dose to the spring and well flows.
The Point of Entry (POE) sampling location is at the City Maintenance Shop located at 740 East 50 South.
We have received the following information for the Spring City Culinary Water Improvement Project 2024, Canyon Tank (ST004) and Canyon Chlorinator (TP002):
Certification of Rule Conformance with plan approval conditions by a professional engineer.
As-built or record drawings will be furnished at a later date.
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 the Spring City Culinary Water Improvement Project 2024,
Canyon Tank (ST004) and Canyon Chlorinator (TP002)is hereby issued as constituted by this letter. You may now place the Canyon Tank (ST004) and Canyon Chlorinator (TP002) in service
in your water system.
Please maintain a copy of this letter with your permanent records for future reference.
Secondary Disinfection Requirements
The Spring City Water Systemis not required to disinfect the water from sources WS001, WS002, WS003, WS004, WS006, WS008 and WS009based on bacteriological source sample results currently
available. The water systemhas elected toinstall the Canyon Chlorinator (TP002)to provide a detectable disinfectant residual in the distribution system for secondary disinfection.
Please be aware that, if any water source of the Spring 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.
The Spring City Water Systemis required to demonstrate ongoing compliance with the secondary disinfection requirements outlined in Addendum 1 of this letter as long as the Canyon Chlorinator
(TP002) is in operation.
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 John Chartier, DEQ Central District Engineer, at [phone], or Michael Newberry, Permitting and Engineering
Support Manager, at [phone].
Sincerely,
Russell Seeley, P.E.
Assistant Director
JLC/mrn/mdbEnclosure –Addendum 1 - Elective Monitoring and Reporting RequirementsDBP Sample Site Plan TemplateChlorinator Operational Report Templatecc:Eric Larsen, Central Utah Public
Health, [e-mail] Jason Brimhall, P.E., Sunrise Engineering, Inc., [e-mail] Cory Madsen, Spring City, [e-mail] John Chartier,
P.E., DEQ Central District Engineer, [e-mail] Luke Treutel, Division of Drinking Water, [e-mail] David Kruse, Division of Drinking Water,[e-mail] Jennifer
Yee, Division of Drinking Water, [e-mail] Kjori Shelley, Division of Drinking Water, [e-mail] Melissa Noble, P.G., Division of Drinking Water, [e-mail]
jchartier 20008 13640 OP TP002
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 EP002 in the Division’s database. This location is in the city maintenance shop located at 740 East 50 South. 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 the chlorinator POE sampling location a minimum of three (3) times per week. [R309-215-
10(1)]
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)]
Disinfection Byproducts Monitoring & Reporting Requirements
In addition to the chlorine monitoring and reporting described above, the system is now required to monitor disinfection byproducts as a result of introducing disinfection to the system.
According to our records, the water system serves a population of approximately 1,050 people and serves groundwater from the system’s sources. Based on this information, the water system
is required to collect samples from two (2) Disinfection Byproduct (DBP) sampling sites per year. Each disinfection byproduct sample should be a paired sample of Total Trihalomethanes
(TTHM) and Haloacetic Acids (HAA5). The first set of DBP samples must be collected in 2026, during the July 1 - September 30, 2026, monitoring period.
Water system staff will need to select two (2) sites to be sampled for DBPs. A sampling site plan template has been enclosed with this letter and needs to be completed as part of this
process. Please fill out the sampling site addresses, include a simple map or schematic of the distribution system and where each of these sites is located. You will need to include
the following information:
A site at a maximum retention location in the distribution system, to be labeled MR001
A site at a midpoint (average retention location) in the distribution system, to be labeled MD001.
A schematic of the distribution system with a location for each proposed sampling site
A justification for the selection of the two proposed sites
This form is due back to the Division within 30 days of the date of this letter.When the form is complete, please sign and email it to Luke Treutel at [e-mail]. If you have
any questions about selecting DBP sampling sites, please contact Luke Treutel.
Source Assessment Monitoring Requirements
This water system is required to take monthly bacteriological samples of the Mudhole Spring, Prince Albert Spring, Lower Ox Spring, Upper Ox Spring, Upper South Well, Birch Spring, and
Upper North Well (WS001, WS002, WS003, WS004, WS006, WS008, and WS009) prior to any treatment, for the months the springs/wells are (in operation or accessible). The source sampling
requirement shall begin in October 2025 and continue for a minimum of 12 months.
The purpose of the source sampling requirement is to gather data to evaluate the quality of the source water from Mudhole Spring, Prince Albert Spring, Lower Ox Spring, Upper Ox Spring,
Upper South Well, Birch Spring, and Upper North Well (WS001, WS002, WS003, WS004, WS006, WS008, and WS009) and determine whether primary disinfection treatment is required or not.
Label the source samples with WS001, WS002, WS003, WS004, WS006, WS008, and WS009 as the sampling locations.
Please note that the source sampling is in addition to the distribution system bacteriological sampling already in place, which is labeled DS001.
In the result of an E. coli positive sample, please contact Sitara Federico at [phone] or [e-mail] within 24 hours of notification from the lab. Also, contact Sitara
Federico for any related questions to this source sampling requirement.