DDW-2025-000332

January 15, 2025
Kirk Arens
Utah Flour Mill
730 17th Street
Suite 600
Denver, Colorado 80202
Subject:Plan Approval, Well Equipping Utah Flour Mill Well (WS001), Utah Flour Mill Hydro Tank (HD001) and TemporaryException to R309-510-8, Storage Sizing
Utah Flour Mill, System #03123, File #13598
This Temporary Exception Expires on January 31, 2028
Dear Kirk Arens:The Division of Drinking Water (the Division) received the plans and specifications for the proposed Utah Flour Mill Well and Hydropneumatic Tank from your consultant,
Michael Hartvigsen, P.E., on October 18, 2024. The Division issued Plan Approval for drilling Utah Flour Mill Well on January 9, 2024. The following is a summary of the Division’s review
of this project:The Division received constant rate drawdown test data for the well on November 5, 2024.Written review comments were provided to your consultant on November 8, 2024.The
Division received revised plans and specifications on November 20, 2024.Additional comments, including a request for peak day demand and storage capacity information, were provided to
your consultant on November 22, 2024. The Division received peak day demand calculations on November 25, 2024. The Division met with your consultant on December 10, 2024, to discuss
the possibility of an exception to storage sizing requirements.The Division received an exception request to R309-510-8 Storage Sizing on December 23, 2024.
Our understanding of the project includes equipping the Utah Flour Mill Well, including installation of well discharge piping, a pump to waste line, and a new hydropneumatic tank to
be used for drinking water storage and to maintain pressure within the mill. The Utah Flour Mill Well will be equipped with two submersible pumps: a 1.5 horsepower (hp), 12 gallon-per-minute
(gpm) pump to provide drinking water to the mill, and a 25 hp, 300 gpm pump to fill the suppression tank. Between the well head and the mill building, a valved branch off the well transmission
line will run to the system’s fire suppression tank. The transmission line will terminate with an air gap at the fire suppression tank, which is not part of the drinking water system
and has not been reviewed or approved for drinking water use. Within the mill building, the well transmission line will optionally pump to a new, Flexcon Model (G)H2P 120 hydropneumatic
tank with an effective volume of 119 gallons. The hydropneumatic tank will serve as the system’s drinking water storage tank, as well as provide pressure to the building’s plumbing and
prevent the variable frequency drive on the well from cycling on and off unnecessarily. The Utah Flour Mill Well is identified as WS001 in the Division’s database. The Utah Flour Mill
Hydro Tank is identified as HD001 in the Division’s database.
We have received the following information for Utah Flour Mill Well and Utah Flour Mill Hydro Tank:
Certification of well seal.
Well driller’s report (well log).
Aquifer drawdown test results (step drawdown test and constant-rate test).
New Source Chemical Analysis of the well water.
Plans and specifications for equipping the well.
Pump information
Well head discharge piping, including Utah Flour Mill Hydro Tank.
Pitless adapter information.
We have completed our review of the plans and specifications, stamped, and signed by Michael Hartvigsen, P. E., and dated November 20, 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 Utah Flour Mill Well and installing Utah Flour Mill Hydro Tank
are hereby approved.
This approval pertains to construction only. An Operating Permit must be obtained from the Director before Utah Flour Mill Well and Hydro Tank 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.
Exception Request
The basis for your request for an exception to R309-510-8Storage Sizing is that due to space constraints at the mill, installing an above ground or buried drinking water storage tank
is not feasible. You propose the following measures to provide equivalent protection for public health to meet the intent of the rule:
The demand from the milling process makes up the majority of the water system’s source and storage capacity requirements.
A 119-gallon hydropneumatic tank will be installed to meet the storage requirements of the building’s bathrooms, showers, and break room.
If the well is ever offline for repair or maintenance, the mill will not be able to operate, and employees will be sent home until the well is repaired.
On this basis, an exception to R309-510-8 Storage Sizing, is hereby granted for Utah Flour Mill (UTAH03123).
This Temporary Exception expires on January 31, 2028.
You will be required to re-submit an exception request along with confirmation that all conditions outlined in this temporary exception have been fulfilled and obtain an exception renewal
prior to January 31, 2028.
Exceptions granted by the Division include an expiration date to ensure that the basis and conditions for granting the exception are verified periodically and that the drinking water
quality remains protected. After receiving your request, the Division will determine whether this exception can be re-issued.
Failure to request the re-evaluation of this exception and obtain an exception renewal by January 31, 2028, will result in the activation of the deficiency related to not having sufficient
drinking water storage capacity.
This Temporary Exception may be rescinded any time if new evidence indicates that the conditions of this exception are no longer being met or a public health risk exists due to this
exception.
If you have any questions regarding this approval or temporary exception, please contact Hunter Payne, of this office, at [phone], or Michael Newberry, Permitting and Engineering
Manager, at [phone].

Sincerely,
Russell Seeley, P.E.
Assistant Director
HP/mrn/mdbEnclosures─ Well Approval Checklist; Operating Permit Checklistcc:Ben Harker, Bear River Health Department, [e-mail] Hartvigsen, P.E., Jones & DeMille Engineering,
Inc., [e-mail] Arens, Utah Flour Mill, [e-mail]
Hunter Payne, Division of Drinking Water, [e-mail]
John Steffan, Division of Drinking Water, [e-mail]
Dylan Martinez, Division of Drinking Water, [e-mail]
Jennifer Yee, Division of Drinking Water, [e-mail]
Nagendra Dev, P.E., Division of Drinking Water, [e-mail] 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