DDW-2025-002038

March 4, 2025
Aldo Giovanni Biasi
Parowan City Water System
PO Box 576
Parowan, Utah 84761
Subject:Plan Approval, Parowan Airport Water Line Extension (DS001);
Parowan City Water System, System #11010, File #16640
Dear Aldo Biasi:The Division of Drinking Water (the Division) received the final stamped plans and specifications for the Parowan Airport Water Line Extension from Paul Andersen, Sunrise
Engineering, on January 8, 2024. Hydraulic Modeling was also received prior to that in a Technical Memorandum from Bowen Collins & Associates on February 28, 2024. Written review comments
were provided to you and Sunrise Engineering on February 3, 2025. The Division received the revised plans and specifications on February 7, 2025. This project has met the conditions
for receiving plan approval.
Our understanding of the project is to connect a new water line to Parowan City’s existing distribution system. The new water line is intended to serve an industrial development including
a new manufacturing facility and 40 private airplane hangars. The water line extension includes 2,900 linear feet (LF) of 8-inch diameter PVC C900 and 840 LF of 12-inch diameter PVC
C900 pipe. This will include fire hydrants, service connections, and all appurtenant valves and fittings.
Hydraulic modeling was completed for this project. The modeling indicates that all required pressures and flows can be met, except for fire flow. The Parowan City Fire Department was
consulted and they have sent a letter indicating that while the required fire flow of 1,000 gallons per minute (gpm) at 20 psi cannot be met, they approve a lower fire flow rate of 740
gpm, with the understanding that a future 12-inch line is being pursued with further funding, which will allow the 1,000 gpm fire flow to be met at that time.
We have completed our review of the plans and specifications, stamped, and signed byNathan Wallentine, P.E., dated January 7, 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 Parowan Airport Water Line Extension are hereby approved.
This approval pertains to construction only. An Operating Permit must be obtained from the Director before this water line 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, 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 J. Paul Wright, P.E., DEQ Southwest District Office, at (4335) 986-2590, or me at [phone].
Sincerely,
Michael Newberry, P.E.
Permitting and Engineering Support Manager
JPW/mrn/mdbEnclosures –Operating Permit Checklistcc:Jeremy Roberts, Southwest Utah Public Health Dept., [e-mail] Giovanni Biasi, Parowan City Water System, [e-mail]
Anderson, Sunrise Engineering, [e-mail] Wallentine, P.E., Sunrise Engineering, [e-mail]. Paul Wright, P.E., DEQ Southwest District Office,
[e-mail] Anderson, Bowen Collins & Associates, [e-mail] 11010 16640 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