DDW-2024-007246

April 22, 2024
Brett Palmer
Stansbury Park Improvement District
#10 Plaza
Stansbury Park, Utah 84074
Subject:Operating Permit, Well #5 (WS005) and Well #5 Tablet Chlorinator (TP005);
Stansbury Park Improvement System, System #23003, File #10958
Dear Brett Palmer:
The Division of Drinking Water (the Division) received a request for an Operating Permit for Well #5 and the Well #5 Tablet Chlorinator on March 12, 2024. The Division issued Plan Approval
for this project on January 27, 2022. This project has met all conditions for receiving an operating permit.
The letter includes the following sections and addenda:

1. Well #5 (WS005) Project Summary
2.Well #5 Tablet Chlorinator (TP005) Project Summary
3. Operating Permit for Well #5 Well and Tablet Chlorinator (WS005, TP005)
4. Secondary Disinfection Requirements5. Monitoring and Reporting
6. Monitoring and Reporting Requirements (Addendum 1)
Well #5 (WS005) Project Summary
Our understanding is that Well #5 has been completed according to the following:
This project was comprised of equipping Stansbury Park Improvement District’s new Well #5. The new well pump, well discharge piping, and tablet chlorinator are housed within a new well
house located near the intersection of Church Road and Old Ranch Road in Stansbury Park, Utah.
The well was equipped with a new 400-horsepower vertical turbine pump with a maximum pumping capacity of 2,500 gallons per minute (gpm). The pump was equipped with a variable frequency
drive (VFD). The intake for the pump is approximately 250 feet below the ground surface.
The well discharge piping includes a Rossum sand tester, an automatic backwashing screen filter for sand removal, a magnetic flow meter, a new turbidimeter, and other valves and appurtenances.
The discharge piping connects to a valved pump-to-waste line which discharges into a detention basin outside the well house.
A 1.5-inch diameter water line pulls water from the well discharge piping downstream of the sand filter to supply the new tablet chlorinator solution tank. Another 1.5-inch diameter
line returns the chlorinated water to the well discharge line just upstream of where the piping enters the floor and flows out of the building.
A new Horizon Model PTF-100 tablet chlorinator was installed inside the new well house.
This well is identified as WS005 in the Division’s database
Well #5 Tablet Chlorinator (TP005) Project Summary
The Well #5 Tablet Chlorinator (TP005) included in this project has been completed according to the following:
The Well #5 Tablet Chlorinator is a tablet chlorinator using Horizon PT 90 trichloroisocyanurate (trichlor) tablets.
This chlorinator adds chlorine to the water from Well #5 (WS005).
This chlorinator is only intended to provide elective disinfection and to help maintain the chlorine residual within Stansbury Park Improvement District’s distribution system. This chlorinator
is not intended to provide primary or secondary disinfection.
The Horizon PT 90 tablets meet the ANSI/NSF 60 standard.
The design target dose of 0.3 mg/L or ppm (measured as free chlorine) is based on an anticipated flow of 2,500 gpm from Well #5 (WS005).
The chlorine dose will be adjusted by an automatic flow-paced control.
The Point of Entry (POE) sampling location will be a continuous analyzer located within the Well #5 Well house. A ¾-inch diameter line runs to the analyzer from a saddle on the main
line about 30 feet outside the well house, downstream of the well discharge line connection.
This chlorinator is identified as TP005 in the Division’s database.
Operating Permit for Well #5 (WS005) and Well #5 Tablet Chlorinator (TP005)
We have received the following information for Well #5 (WS005) and the Well #5 Tablet Chlorinator (TP005):
Design engineer’s statement of conformance with approval conditionsand that changes made during construction were in conformance with rules R309-500 through 550.
Evidence of O&M manual delivery.
Record drawings.
Documentation that the requirements for coverage under the City/County source protection ordinance have been met.
Satisfactory bacteriological results as evidence of proper disinfection and flushing.
We have determined that all conditions for issuing an operating permit have been met. On this basis, an Operating Permit for Well #5 and Well #5 Tablet Chlorinatoris hereby issued as
constituted by this letter. You may now place the new facilities in service in your water system.
Please maintain a copy of this letter with your permanent records for future reference.
The equipped well pump capacity of Well #5 is 2,500 gallons per minute (gpm). The safe yield of Well #5 is rated at 1,933 gpm, which is calculated based on two-thirds of the constant-rate
aquifer drawdown test results at 2,900 gpm. The safe yield of 1,933 gpm is the basis for determining the maximum number of connections that Well #5 can serve.
Secondary Disinfection Requirements
The Stansbury Park Water System has elected to install the Well #5 Tablet Chlorinator (TP005) and must provide continuous disinfection to maintain detectable chlorine residuals throughout
the distribution system for secondary disinfection. Stansbury Park Water Systemis not currently required to disinfect Well #5 (WS005) based on available bacteriological source sample
results.
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 that, if any water source of the Stansbury Park Water System is 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 Stansbury Park Water System is required to demonstrate ongoing compliance with the secondary disinfection requirements found in Addendum 1 as long as the Well #5 Tablet Chlorinator
(TP005) is in operation.
Monitoring and Reporting
Issuance of this Operating Permit changes your water system’s monitoring and reporting requirements. Additional monitoring and reporting requirements are found in Addendum 1 to this
letter.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 Hunter Payne, of this office, at [phone], or Michael Newberry, Permitting and Engineering Support Manager,
at [phone].
Sincerely,
Russell Seeley, P.E.
Assistant Director
HP/mrn/mdbEnclosures –    Addendum 1- Monitoring and Reporting Requirementscc:Bryan Slade, Tooele County Health Department, [e-mail] Neil, P.E., Bowen Collins
& Associates, [e-mail] Palmer, Stansbury Park Improvement District, [e-mail] Payne, Division of Drinking Water, [e-mail] Arns,
Division of Drinking Water, [e-mail] Martin, Division of Drinking Water, [e-mail] Treutel, Division of Drinking Water, [e-mail] Federico, Division
of Drinking Water, [e-mail] 23003 10958 OP WS005 TP005
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 EP005 in the Division’s database. This location has been identified as the continuous analyzer located within the Well #5 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 serves 9,839 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. 
Operational reports are submitted quarterly. The reports are due to the Division by the 10th day following the end of each reporting month or quarter (i.e., January 10th, April 10th,
July 10th, and October 10th for quarterly reports). The reports can be submitted by hardcopy, fax, or email at [e-mail]. 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)]
Source Bacteriological Monitoring 
This water system is required to take monthly bacteriological samples of the Well #5 (WS005) prior to any treatment, for the months the spring is (in operation or accessible). The source
sampling requirement shall begin with the 2024 operating season and last at least two operating seasons.
The purpose of the source sampling requirement is to gather data to evaluate the quality of the source water from Well #5 (WS005) and determine whether primary disinfection treatment
is required or not.
Label the source samples with WS005 as the sampling location. 
The required source bacteriological sampling is shown on your monitoring schedule for this sample site. Please note that the source sampling is in addition to the distribution system
bacteriological sampling already in place, which is labeled DS001.
After two seasons of source sampling data become available, the Division will evaluate the results to determine whether primary disinfection is required for Well #5 (WS005).
Please contact Sitara Federico for any positive samples that may occur at the source at 385-515-1459 or [e-mail]. If any sample result comes back as E. coli positive, please
contact the Division within 24 hours of being notified of the result.Source Chemical Monitoring
Issuance of this Operating Permit changes your water system’s monitoring and reporting

requirements. The monitoring requirements for this well are given below. An updated monitoring schedule can be viewed any time at waterlink.utah.gov under the Water Monitoring section.
Please contact David Kruse at (385)-566-7789 or [e-mail] for questions regarding the source monitoring and reporting requirements for your water system.Facility with new requirementsAnalyte(s)
Required# of samplesSampling FrequencyNext Due DateRule ReferenceWS005 Well #5Inorganics & Metals1Every three years01/01/2023-12/31/2025R309-205-5(3)(a)Nitrate1Yearly01/01/2024-12/31/2024R309-205-5(4)(a)Sulfate,
Sodium, TDS1Every three years01/01/2023-12/31/2025R309-205-5(3)(a)Pesticides1Quarterly07/01/2024-09/30/2024R309-205-6(1)(d)Radionuclides1Quarterly07/01/2024-09/30/2024R309-205-7(1)(b)Volatile
Organic Contaminants1Yearly01/01/2024-12/31/2024R309-205-6(2)