DDW-2025-002480

March 18, 2025
Zachary Renstrom
Washington County WCD - Quail Lake
533 Waterworks Drive
St. George, Utah 84770
Subject:Plan Approval, Phase 1 and Phase 2 of the Quail Creek WTP Expansion;
Washington County WCD - Quail Lake, System #27094, File #14989
Dear Zachary Renstrom:The Division of Drinking Water (the Division) received the plans and specifications for Phase 1 and Phase 2 of the Quail Creek WTP (TP001) Expansion from your consultant
Tyler Bird, P.E., of Hazen and Sawyer on February 24, 2025. This project has met the conditions for receiving a plan approval.
Our understanding of the first two phases of the Quail Creek WTP (TP001) Expansion is to prepare the Quail Creek WTP (TP001) to install the new ozone, dissolved air floatation (DAF)
over filtration, and ultraviolet processes that will be included in Phase 3. Phase 1 includes the mechanical upgrades necessary to rerate the existing DAF process to 60 MGD. No change
will be made to the existing filters. Phase 2 will include the demolition of the existing pretreatment, flocculation, and sedimentation basins.
We have completed our review of the plans and specifications of the proposed Phase 1 and Phase 2 of the Quail Creek WTP (TP001) Expansion, stamped and signed by Jeremy Williams, P. E.,
and dated February 10, 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 construction of Phase 1 and Phase 2 of the Quail Creek WTP (TP001) Expansion are hereby approved.
This plan approval pertains to construction only. An Operating Permit must be obtained from the Director before the expansion may be put into service. A checklist outlining the items
required for issuing an Operating Permit for this treatment plant is enclosed for your information.Approvals or permits by local authorityor 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 Dani Zebelean, P.E., of this office, at [phone], or me at [phone].
Sincerely,
Michael Newberry, P.E.
Permitting and Engineering Support Manager
DZ/mrn/mdbEnclosuresOperating Permit Checklistcc:Jeremy Roberts, Southwest Utah Public Health Department, [e-mail] Williams, Hazen and Sawyer, [e-mail]
Bird, Hazen and Sawyer, [e-mail] Hall, Hazen and Sawyer, [e-mail] Rentsrom, Washington County WCD - Quail Lake, [e-mail] Johnson,
Washington County WCD - Quail Lake, [e-mail] Wright, P.E., Southern DEQ District Engineer, [e-mail]
Dani Zebelean, Division of Drinking Water, [e-mail]
Nathan Lunstad, Ph.D., P.E., Division of Drinking Water, [e-mail]
David Kruse, Division of Drinking Water, [e-mail]
Sarah Page, Ph.D., Division of Drinking Water, [e-mail]
Dylan Martinez, Division of Drinking Water, [e-mail] DZebelean 27094 14989 Expansion Phase 1 & 2 PA TP001
Utah Division of Drinking Water ― Checklist for Issuing Operating PermitsWater System Name:Washington County WCD - Quail LakeSystem Number: 27094Project Description: Phase 1 & 2
of 90 MGD ExpansionFile Number: 14989
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).☐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 — Specify the required finished water and/or raw water data to demonstrate WTP performance before an OP can be issued, e.g., arsenic data/interval/frequency/sampling
location.☐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