DDW-2024-014335

December 16, 2024
David C Norman
Lehi City
2538 North 300 West
Lehi City, Utah 84043
Subject:Plan Approval, Well Equipping, Skye Family Park Well House and Chlorinator (WS019, TP019);
Lehi City, System #25015, File #17696
Dear David C. Norman:The Division of Drinking Water (the Division) received the plans and specifications for equipping Skye Family Park Well and installing Skye Family Park Well treatment
facility for chlorination from your consultant, Greg Thomas, P.E., and HAL Engineers on November 27, 2024. The Division issued Plan Approval for drilling Skye Family Park Well on May
23, 2023.Review comments for well equipping were sent on December 3, 2024; revised plans received on December 10, 2024.
The letter includes the following sections and addenda:
Project Summary for Equipping Skye Family Park Well (WS019) and Skye Family Park Well Chlorinator (TP019)
Plan Approval for Equipping Skye Family Park Well (WS019) and Skye Family Park Well Chlorinator (TP019)
Operating Permit Checklist
Future Monitoring and Reporting Requirements (Addendum 1)Project Summary
The project includes the construction of a drinking water well pump station equipped with a gas chlorination system, discharge main pipeline, pump-to-waste pipeline, electrical supply
conduit, and a natural gas generator with a service line. The well will be equipped to pump 2,500 gpm against 599 feet of head. The pump is a vertical turbine with a 500 horsepower (HP)
motor. The well was pump tested at 4,000 gpm. The Division's database identifies this well and the chlorination facility as WS019 and TP019, respectively.
Plan Approval
The plan review of the proposed Skye Family Park Well Chlorinator (TP019) has been completed according to the following:The proposed Skye Family Park Well (TP019) is an Evoqua/Wallace
& Tiernan S10K sonic gas chlorinator. This chlorinator will add chlorine to the water from Skye Family Park Well (WS019).This chlorinator is intended to provide secondary disinfection
in the distribution system.The chlorinated water will go to the distribution system and the Low Hills Tanks (ST004 and ST006).The proposed gas chlorine for disinfection meets the ANSI/NSF
60 standard.The proposed design target dose of 0.8 mg/L or ppm (measured as free chlorine) is based on a typical flow of 2,500 gallons per minute (gpm) from Skye Family Park Well (WS019).The
chlorine dose will be adjusted by an automatic flow-paced control.The Point of Entry (POE) sampling location will be within the well house. A Wallace & Tiernan Depolox 5 Plus Residual
Analyzer is specified.
We have received the following information for the Skye Family Park Well and Chlorination Facility:
Certification of well seal.
Well driller’s report (well log).
Aquifer drawdown test results (step drawdown test and constant-rate test).
New Source Chemical Analyses of the well water.
Plans and specifications for equipping the well.
Pump information e.g., pump specifications, pump curve and operating point.
Well head discharge piping.
Well house design
Chlorinator design/plans/specs
We have completed our review of the plans and specifications, stamped and signed by Gregory S. Thomas, P. E., and dated December 6, 2024,and find they basically comply with the applicable
portions of Utah’s Administrative Rules for Public Drinking Water Systems in R309. On this basis, the plans for equipping Skye Family Park Well (WS019) and Skye Family Park Well Chlorinator
(TP019) are hereby approved.
This approval pertains to construction only. An Operating Permit must be obtained from the Director before Skye Family Park Well (WS019) and Skye Family Park Well Chlorinator (TP019)
may be put into service. A checklist outlining the well approval process, including the items required for issuing an operating permit for this well is enclosed for your information.
Enclosed please also find an Operating permit Checklist for other components of this project.Approvals or permits from the local authority or county may be necessary before beginning
construction of this project. As the project proceeds, notice of any changes in the approved design, as well as any change affecting the quantity or quality of the delivered water, must
be submitted to the Division. We may also conduct interim and final inspections of this project. Please notify us when actual construction begins so that these inspections can be scheduled.
This approval must be renewed if construction has not begun or if substantial equipment has not been ordered within one year of the date of this letter.
Secondary Disinfection Requirements
The Lehi City water systemis not required to disinfect the Skye Family Park Well (WS019) based on bacteriological source sample results currently available. The water system proposes
to voluntarily install the Skye Family Park Well Chlorinator (TP019) to provide a detectable disinfectant residual in the distribution system for secondary disinfection.
The plan review of the proposed Skye Family Park Well Chlorinator (TP019) is based on providing secondary disinfection. When this chlorinator is installed and placed in operation after
the Operating Permit issuance, the Lehi 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 ofthe 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 ifSkye Family Park Well (WS019) is found to requireadditionaldisinfection in the future per R309-200-5(7)(a)(i), further regulations will apply. For example, if primary
disinfection is required 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.
If you have any questions regarding this approval, please contact Chris Martin, of this office, at [phone], or me at [phone].
Sincerely,
Michael Newberry, P.E.
Permitting and Engineering Support Manager
CMM/mrn/mdbEnclosures─ Well Approval Checklist; Operating Permit Checklistcc:Daymon Swensen, Utah County Health Department, [e-mail] Thomas, HAL Engineers, [e-mail]
Norman, Lehi City, [e-mail]

Chris Martin, Division of Drinking Water, [e-mail]
Brent Arns, Division of Drinking Water, [e-mail]
Luke Treutel, Division of Drinking Water, [e-mail] (disinfection & DBP)
David Kruse, Division of Drinking Water, [e-mail] (arsenic, inorganics, organics, NO3, rads)
John Steffan, Division of Drinking Water, [e-mail] (for community or NTNC systems)
Garion Rowett, Lehi City, [e-mail] 25015 17696 WS019 TP019 PA - Family Park Well HouseDivision of Drinking WaterChecklist for New Public Drinking Water Wells
(Per Utah Administrative Code, Rule R309-515-6)
System Name:System Number:Well Name & Description:1.Approval to Drill the Well
☐Project Notification Form (PNF)
☐Preliminary Evaluation Report (PER) concurrence
☐Well drilling specifications and plans
☐Valid Start Card or authorization to drill letter from the Division of Water Rights2.Approval to Equip the Well
☐PNF (if the well drilling and well equipping are designed by different consultants)
☐Well location data
☐Certification of well seal
☐Well driller’s report (well log)
☐Aquifer drawdown test results (step drawdown test & constant-rate test) for well yield determination
☐Chemical analyses of the well water
☐Plans and specifications for equipping the well
☐Pump information (e.g., pump specifications, pump curve & operating point, motor information, etc.)
☐Well head discharge piping
☐Well house design3.Operating Permit to Introduce the Well Water
☐Documentation of valid water right(s)
☐Recorded land use agreements, or documentation that the requirements for coverage under the City/County source protection ordinance have been met
☐Design engineer’s certification of conformance with plan approval conditions
☐Design engineer’s certification of rule conformance for any deviation from approved plans
☐As-built or record drawings
☐Evidence of O&M manual delivery to system owner☐Satisfactory bacteriological results as evidence of proper flushing and disinfection
Utah Division of Drinking Water ― Checklist for Issuing Operating PermitsWater System Name:System Number: Project Description:File Number:
Items 1 through 8 below must be submitted to the Division and found to be acceptable prior to operating permit issuance (unless a water line project meets the requirements of R309-500-7
and is not required to obtain an Operating Permit).
Distribution lines (not including in-line booster pump stations) requiring Plan Approval may be placed into service prior to submitting all of the following items and receipt of Operating
Permit if the water system has received items 1 and 4 below.☐1.Certification of Rule Conformance by a professional engineer (P.E.) that all conditions of Plan Approval were accomplished,
and if applicable, changes made during construction were in conformance with rules R309-500 through 550☐2.As-built or record drawings incorporating all changes to approved plans and
specifications (unless no changes were made to the previously approved plans during construction)☐3.Confirmation that as-built or record drawings have been received by the water system☐4.Satisfactory
bacteriological samples as evidence of proper disinfection and flushing in accordance with the appropriate ANSI/AWWA standards:
☐ANSI/AWWA C651-14 AWWA Standard for Disinfecting Water MainsTwo consecutive sample sets at least 16 hours apart, none positive (every 1200 feet, end-of-line, each branch, etc.)☐ANSI/AWWA
C652-11 AWWA Standard for Disinfection of Water-Storage FacilitiesOne or more samples, none positive☐ANSI/AWWA C653-13 AWWA Standard for Disinfection of Water Treatment PlantsTwo consecutive
samples per unit, none positive, no less than 30 minutes apart☐ANSI/AWWA C654-13 AWWA Standard for Disinfection of WellsTwo consecutive samples, none positive, no less than 30 minutes
apart☐5.Water quality data, where appropriate [For example, water quality data showing MCL compliance; raw and finished water data that demonstrate satisfactory performance of the new
treatment facility.]☐6.If applicable, all other documentation that may have been required during the plan review process☐7.If applicable, confirmation that the water system owner has
received the O&M manual for the new facility☐8.If applicable, location data of new storage tank, treatment facility, or source
Addendum 1
Future Elective Monitoring and Reporting Requirements
Chlorine Monitoring & Reporting Requirements
The water system will be required to meet elective disinfection requirements once this facility is installed and operating. As a part of these requirements, the water system will need
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 will be identified in the Division’s database. The location will be identified during the plan approval process. 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 (EP019). [R309-215-10(1)]Our records show that your water system serves
79,978 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 will be 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 elective 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)]