DDW-2025-002708

March 26, 2025
Mike Rau
Central Utah Water Conservancy District
355 West University Parkway
Orem, Utah 84058
Subject:Operating Permit, Well Equipping, Well #16 (WS011) & Well #16 Chlorination Facility (TP011); Central Utah Water Conservancy District – Utah Valley, System #25112, File #12509
Dear Mike Rau:The Division of Drinking Water (the Division) received your request for the Operating Permit for Well #16 (WS011) & Well #16 Chlorination Facility (TP011) from you on March
14, 2025. The Division issued Plan Approval for drilling this well on April 14, 2021, and Plan Approval for equipping this well on February 6, 2024.
Our understanding of the project includes the following:
The project included constructing three (3) drinking water well pump houses. This Operating Permit is for Well #16 consisting of a masonry pump house with asphalt shingle roof, a 6,000
gallons per minute (GPM) vertical turbine pump, and 1,250 horsepower (HP) motor, piping, valves, chlorination equipment, HVAC, electrical, SCADA, security system, a surge tank and vault,
paving, site work, landscaping, fencing, and other associated items and appurtenant work. Well #16 was pump-tested at 6,000 gpm.
A backup power generator and automatic switchover are installed at Well #16.
The Well #16 & Well #16 Chlorination Facilities are identified as WS011 and TP011, respectively, in the Division’s database.
The Well #16 chlorination facility (TP011) is a gas chlorinator (Evoqua Wallace and Tiernan V10K gas chlorination system with SFC-SC controller).
This chlorinator will add chlorine to the water from Well #16 (WS011). Well #16 (WS011) will not be treated by the groundwater polishing plant identified as TP012 in the Division’s database.
This chlorinator is intended to provide secondary disinfection in the distribution system.
The chlorinated water will go to the distribution system.
The proposed gas chlorine for disinfection meets the ANSI/NSF 60 standard.
The proposed design target dose of 0.3 to 0.8 mg/L or ppm (measured as free chlorine) is based on a typical flow of 4,000 gallons per minute (gpm) from Well #16 (WS011).
The chlorine dose will be adjusted by an automatic flow-paced control.
The Point of Entry (POE) sampling location will be from a Siemens Depolox 5 Plus Residual Analyzer pulling directly from the well discharge piping within the pumphouse.
The chlorination facility is identified as TP011 in the Division’s database.
We have received the following information for Well #16 (WS011) & Well #16 Chlorination Facility (TP011):
Design engineer’s statement of conformance with approval conditions(and changes made during construction were in conformance with rules R309-500 through 550).
Satisfactory bacteriological results as evidence of proper disinfection and flushing.
We have determined that all conditions of operating permit issuance have been met. On this basis, an Operating Permit for Well #16 (WS011) & Well #16 Chlorination Facility (TP011)is
hereby issued as constituted by this letter. You may now place Well #16 (WS011) & Well #16 Chlorination Facility (TP011)in service in your water system.
Secondary Disinfection Requirements
The Central Utah Water Conservancy District – Utah Valley water systemis not required to disinfect the Well #16 (WS011)based on bacteriological source sample results currently available.
The water systemhas elected to install the Well #16 chlorination facility (TP011) to provide a detectable disinfectant residual in the distribution system for secondary disinfection.
Please be aware that, if any water source of the Central Utah Water Conservancy District – Utah Valley 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 Central Utah Water Conservancy District – Utah Valley water systemis required to demonstrate ongoing compliance with the secondary disinfection requirements outlined in Addendum
1 of this letter as long as the Well #16 chlorination facility (TP011)is in operation.
Please maintain a copy of this letter with your permanent records for future reference.
The equipped well pump capacity of Well #16 (WS011) is 6,000gallons per minute (gpm). The safe yield of Well #16 (WS011) is rated at 4,000 gpm, which is calculated based on two-thirds
of the constant-rate aquifer drawdown test results at 6,000 gpm. The safe yield of 4,000gpm is the basis for determining the maximum number of connections that Well #16 (WS011) can serve.
If this Operating Permit changes any of your monitoring requirements, the staff of the Water Quality Monitoring and Standards Section will follow up to provide an updated monitoring
schedule to you. Please contact the Mark Berger, Water Quality Monitoring and Standards Section Manager at [phone] for questions regarding the monitoring and reporting requirements
for your water system.
Drinking Water Source Protection Requirement
The Division has reviewed the Drinking Water Source Protection (DWSP) plan for this source submitted by your consultant on March 24, 2025. The Division concurs with this report. The
due date for submitting the next updated DWSP plan is December 31, 2026.
Please contact Noah Zorsky, P.G., at [phone] or at [e-mail] if you have questions or concerns about the review of your DWSP or future updates.
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
Manager, at [phone].
Sincerely,
Russell Seeley, P.E.
Assistant Director
CMM/NAZ/mrn/mdbcc: Daymon Swensen, Utah County Health Department, [e-mail] M. Chambers, Hansen, Allen &Luce, Inc., [e-mail] Hansen, Hansen,
Allen &Luce, Inc., [e-mail] Rau, Central Utah Water Conservancy District, [e-mail] Hilton, Central Utah Water Conservancy District, [e-mail]
Martin, P.E., Division of Drinking Water, [e-mail] Zorsky, P.G., Division of Drinking Water, [e-mail] Kruse, Division of Drinking Water, [e-mail]
Yee, Division of Drinking Water, [e-mail] Treutel, Division of Drinking Water, [e-mail] 25112 12509 OP - Well #16 WS011 & TP011
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 EP011 in the Division’s database. This location has been identified as a point on the discharge piping within 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 chlorine residual concentration, measured as free chlorine, at the chlorinator POE sampling location a minimum of three (3) times per week. [R309-210-
8(3)(a)(ii)] 
Our records show that your water system wholesales to community water systems with greater than 3,300 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)]