DDW-2025-002159

March 6, 2025
Clint Dilley
Magna Water District
8885 West 3500 South
Magna, Utah 84044
Subject:Plan Approval, Rehabilitation of Haynes Well #7 REPL (WS017), Magna Water District, System #18014, File #18390
Dear Clint Dilley,The Division of Drinking Water (the Division) received the plans and specifications for the proposed rehabilitation of the Haynes Well #7 REPL (WS017) from your consultant
Mark Chandler of Horrocks Engineers on December 17, 2024. The Division received updated information for the rehabilitation project on February 12, 2025.
Our understanding of the project is to clean and rehabilitate the existing Haynes Well #7 REPL (WS017) due to decreased specific capacity of the well .The process includes removal of
the pumping equipment, swabbing and bailing to remove debris, chemical treatment, surging and pumping to remove treatment chemicals, shock chlorination, surging and pumping to remove
residual chlorine, reinstallation of pumping equipment and disinfection chlorination of the well and pumping equipment. Water sampling and bacteriological analysis will be performed
following disinfection to assure the well was free of coliform bacteria and suitable for reconnection to the system. We received information from a consultant indicating that all chemicals
used to rehabilitate the well comply with ANSI/NSF Standard 60 per R309-105-10(1).
Rehabilitation Tasks:
During redevelopment tasks, the pump and motor will be pulled. There will be no modification to HP nor TDH (pumping water level will remain essentially the same).
Video Camera Survey of the Haynes Well #7 REPL (WS017) will be conducted. Also, plumbness and alignment testing of the existing well liner will be performed.
There will be physical and chemical cleaning of the well to ensure the optimal performance of the well. The well will be cleaned with a swabbing technique that both cleans the well screens
and pulls water and sand through the screens and is pushed via a submersible pump into a large weir tank. The solids (sands) settle, and water is then discharged into the storm drain
via the same line that the well currently connects to. All work falls under and in compliance with Herriman’s MS4 permit.
Swabbing and evacuating any debris in the well bottom using airlift. If the water is clear enough, possibly run another well video.
Conduct Step-Rate Drawdown testing for 8 hours and Constant Rate testing for 24 hours. This is a ‘like-for-like’ pump bowl assembly replacement with the same existing capacity of motor.
The change in pump bowl assembly should have no effect on pumping water level.
Check well and screen integrity by video inspection.
Place the existing pump system with the same configuration. All other equipment/materials seem to be in good working order.
Super chlorinate the well and then discharge water and convey water to the reservoir until the added chlorine is no longer present in the discharge stream. After chlorine is removed,
collect two consecutive samples no less than 30 minutes apart.Dissolved oxygen will be monitored to ensure de-chlorinated water is safe to discharge.
Well head completion for the production well. Only the pump bowl assembly and pump column are being replaced. The existing motor, discharge piping, etc. are to remain.
Re-connect the well discharge head. The well discharge head passes through the pump house which contains air relief, check valve to prevent backflow, and a surge anticipator valve. The
discharge line then continues the culinary water system for distribution.
We have completed our review of the plans and specifications, stamped, and signed by Mark Chandler, P.E., and dated February 03, 2025, 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 rehabilitation of Haynes Well #7 REPL (WS017) are hereby approved.
This approval pertains to construction only. An Operating Permit must be obtained from the Director before the rehabilitation of Haynes Well #7 REPL (WS017) may be put into 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, 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.
If you have any questions regarding this approval, please contact Nagendra Dev, P.E., of this office, at [phone], or Michael Newberry, P.E., Engineering Manager, at [phone].
Sincerely,
Michael Newberry, P.E.
Permitting and Engineering Support Manager
ND/mrn/mdb
Enclosure ─ Operating Permit Checklistcc: Matthias Neville, Salt Lake County Health Department, [e-mail] Chandler, Horrocks Engineers, [e-mail]
DeMann, Horrocks Engineers, [e-mail] Hammon, Horrocks Engineers, [e-mail] Andra Trevor, Magna Water District, [e-mail] Dilley, Magna
Water District, [e-mail] Noble, Division of Drinking Water, [e-mail] Zorsky, Division of Drinking Water, [e-mail] Dev, P.E., Division of
Drinking Water, [e-mail] PA Magna Haynes Well 7 Repl WS0178 Rehab 18014 18390
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