DDW-2024-007255

April 22, 2024
Tracy Hobart Feltner
Central Iron County WCD
88 East Fiddlers Canyon Road
Suite A
Cedar City, Utah 84721
Subject:Plan Approval, Eight Mile Hills 4.0 MG Tank (ST008) and Eight Mile Hills Chlorinator (TP008); Central Iron County WCD, System #11085, File #13636
Dear Tracy Feltner:The Division of Drinking Water (the Division) received the plans and specifications for the proposed Eight Mile Hills 4.0 MG Tank and Chlorinator Project from Ryan
LeBaron, Sunrise Engineering, on January 17, 2024. On that same day, comments were sent to you and your consultant regarding additional information needed for the chlorinator and the
fact that this needed to be separated from another project since they both involved two different water systems. The Division received the revised plans on February 8, 2024. Review comments
on the plans were sent to you and your consultant on March 4, 2024. Final plans were received by the Division on March 19, 2024. This project has met the conditions for receiving a plan
approval.
The letter includes the following sections and addenda:

1. Project Summary for Eight Mile Hills Tank (ST008) and Eight Mile Hills Chlorinator (TP008)
2. Plan Approval for Eight Mile Hills Tank (ST008) and Eight Mile Hills Chlorinator (TP008)
3. Operating Permit Checklist 
4. Future Monitoring and Reporting Requirements (Addendum 1)Project Summary
Our understanding of the project is the construction of a 4.0 million-gallon prestressed, reinforced concrete tank. The tank will include all of the necessary items including an inlet,
outlet, drain, access hatch, and air vents. A future transmission line will be constructed that will convey water to this tank but is not a part of the project at this time. This tank
will be referred to as the Eight Mile Hills 4.0 MG Tank (ST008) in the Division’s database.
The project also includes a chlorinator that will boost chlorine from all of the sources that are a part of this water system since they will all be conveyed to this tank through a future
transmission line. The plan review of the proposed Eight Mile Hills Chlorinator (TP008) has been completed according to the following:
The proposed Eight Mile Hills Chlorinator is a Regal Model 216 gas chlorinator.
This chlorinator will have the potential to add chlorine to the water from all sources within the water system. This would include Fielding - Derby Well #1 (WS001), Derby Well #2 (WS002),
(Eagle Valley Ranches Well (WS003) , North Ridge Well (WS005), Park West Well (WS006), West Slope Well #1 (WS007), and District Well #2 (WS008).
This chlorinator is intended to boost chlorine residual in the water system to provide secondary disinfection. The reason it is a booster chlorinator is because each well described
above already has a chlorinator installed.
The chlorinated water will go directly into the proposed 4.0 MG Eightmile Hills Tank (ST008).
The proposed chlorine gas for disinfection meets the ANSI/NSF 60 standard.
The proposed design target dose of 0.5 mg/L or ppm (measured as free chlorine) is based on a typical combined flow of 2500 gallons per minute (gpm) from Fielding - Derby Well #1 (WS001),
Derby Well #2 (WS002), (Eagle Valley Ranches Well (WS003) , North Ridge Well (WS005), Park West Well (WS006), West Slope Well #1 (WS007), and District Well #2 (WS008).
The chlorine dose will be adjusted by a manually adjusted gas flow meter set for the constant flow from each of the sources described above.
The Point of Entry (POE) sampling location will be a sample tap in the tank outlet vault. A HACH CL17SC Colorimetric Chlorine Analyzer will also be installed in the outlet vault for
continuous monitoring of free chlorine levels.
Plan Approval for Eight Mile Hills 4.0 MG Tank (ST008) and Eight Mile Hills Chlorinator (TP008)
We have completed our review of the plans and specifications, stamped, and signed byVernal Edward Maloy, P.E., dated March 13, 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 Eight Mile Hills 4.0 MG Tank (ST008) and Eight Mile Hills Chlorinator
(TP008) are hereby approved.
This approval pertains to construction only. An Operating Permit must be obtained from the Director before the Eight Mile Hills 4.0 MG Tank (ST008) and Eight Mile Hills Chlorinator (TP008)
may be put in service. A checklist outlining the items required for operating permit issuance is enclosed for your information.Approvals or permits from the local authority or the county
may be necessary before beginning construction of this project. As the project proceeds, a 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 Central Iron County WCD water systemis not required to disinfect the Fielding - Derby Well #1 (WS001), Derby Well #2 (WS002), Eagle Valley Ranches Well (WS003), North Ridge Well
(WS005), Park West Well (WS006), West Slope Well #1 (WS007), or District Well #2 (WS008) based on bacteriological source sample results currently available. The water system proposes
to electively install the Eight Mile Hills Chlorinator (TP008) to boost chlorine from the chlorinators that are already installed on this water system and provide a detectable disinfectant
residual in the distribution system for secondary disinfection.
The plan review of the proposed Eight Mile Hills Chlorinator (TP008) is based on providing secondary disinfection. When this chlorinator is installed and placed in operation after the
Operating Permit issuance, the Central Iron County WCD 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 if any water source is found to require additionaldisinfection 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
If you have any questions regarding this approval, please contact J. Paul Wright, DEQ Southwest District Engineer, at [phone], or me at (385) 515‑1464.
Sincerely,
Michael Newberry, P.E.

Permitting and Engineering Support Manager
JPW/mrn/mdbEnclosures –Operating Permit ChecklistAddendum 1- Future Monitoring and Reporting Requirementscc:Jeremy Roberts, Southwest Utah Public Health Department, [e-mail].
Paul Wright, P.E., DEQ Southwest District Office, [e-mail] LeBaron, Sunrise Engineering, [e-mail] Maloy, Sunrise Engineering, [e-mail]
Treutel, Division of Drinking Water, [e-mail] 11085 13636 ST008 TP008 PA
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 (e.g., every 1,200 feet, end-of-line, each branch)☐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, include raw and finished water data that demonstrate satisfactory performance of the treatment facility; sample should be
taken from a storage tank for residual volatile organic compounds after tank interior re-coating; etc.]☐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 as EP008 in the Division’s database. The entry point monitoring location is the chlorine analyzer. 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)]
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. 
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)]