DDW-2025-003207

April 3, 2025
David Shearer
Great Salt Lake Park
P.O. Box 16658
Salt Lake City, Utah 84116
Subject:Plan Approval, Marina Storage Tank (ST001), Marina Booster station (PF 001), Marina Chlorinator (TP001) and GSL Marina Water Line Project; Exception to R309-550-7(1) Minimum
Separation Requirements; Great Salt Lake Park, System #18135, File #19874Dear David Shearer:The Division of Drinking Water (the Division) received the plans and specifications for the
Great Salt Lake Park (GSL) Marina Storage Tank (ST001), Marina Booster Station (PF001), Marina Chlorinator (TP001), Marina Water Line Project and Exception to R309-550-7(1) Minimum Separation
Requirements from Robert Rousselle, P.E., of Ensign Engineering on March 03, 2025. The updates on the project were received by Division staff on March 25, 2025. This project has met
the conditions for receiving plan approval.
Our understanding of the project is as follows:
GSL Water Line Project (DS001)
The Great Salt Lake State Park PWS will connect to Salt Lake City's PWS at the intersection of 8000 West and the Interstate 80 (I-80) North Frontage Road (Station 451+79).
There will be 7.75 miles of 4-inch diameter DR-17 HDPE water supply/transmission line and isolation and combination air/vacuum valves constructed at intervals of approximately 0.25 miles
along the 4-inch water supply/transmission line alignment and at high points.
Three (3) 2-inch above grade blow offs along the 4-inch diameter water supply/transmission line alignment will be constructed to utilize during repairs and maintenance at Stations: 32+51,
132+28, and 301+48.
There will not be any service connections or fire hydrants on the 4-inch transmission/supply water line.
Marina Booster Station (PF001)
Installation of booster pump (~1,950 gpm capacity, 215 Total HP) at Station 43+00.
Marina Storage Tank (ST001)
Installation of Prestressed D110 concrete water storage tank (210,000-gallon capacity) at Marina’s storage yard (Station 32+00).
Additional requirements:
There will be 8-inch and 10-inch diameter DR-17 HDPE distribution lines with fire hydrants and connections to existing water services will be constructed.
There will be approximately 629 linear feet of 8-inch diameter and 1,829 linear feet of DR-17 PE 4710 IPS HDPE installed.
Great Salt Lake Park PWS will be responsible for constructing and maintaining water system improvements of 4-inch pipeline and appurtenances.
State Lands will be responsible for maintaining the existing 10-inch water line which supplies the Great Saltair. 
Great Salt Lake Park PWS will take water samples at the Great Saltair.
Hydraulic analysis of the Great Salt Lake State Park Public Water System (System # 18135) shows the water system will serve the indoor, outdoor, fire and irrigation demands for the Great
Salt Lake Park (Marina) and Great Saltair meeting state standard pressure rule. Currently the Marina and Great Saltair are supplied drinking water from Stansbury Park Improvement District
(System# 23003).
The transmission/supply water line will flow into the booster pump station building where it will be controlled based on levels in the storage tank via a double solenoid control valve
and radar level in the tank.
After routed through the booster pump station building it flows into the storage tank.
Due to concerns by Salt Lake City for disinfection by-products (DBPs), the storage tank will have a mixer running 24 hours, 7 days a week (24/7) along with a forced air intake to force
DBPs out of the water.
The tank water will be injected with residual chlorine with 12.5% sodium hypochlorite. 
The outlet of the tank will flow to the suction header of the booster pump skid. The booster pump skid will consist of one (1) low flow pump, 158 gallons per minute (gpm), which pumps
average day, peak day, and peak instantaneous demand with a discharge pressure of 110 psi. The booster pump skid also has four (4) high flow pumps, three (3) duty and one (1) standby
at 600 gpm each, which meet peak day demand plus fire flow with a discharge pressure of 95 psi.
There are two (2) metered discharge pipes from the booster pumps. One pipe will go to the Marina where new fire hydrants and 8-inch and 10-inch diameter water distribution lines will
be constructed and the other 10-inch diameter line will connect to the existing 10-inch water line which supplies the Great Saltair.
Hydraulic model software used was Bently WaterCAD for Civil 3D to confirm adequate pipe diameters, pressures, and flows for peak day, peak instantaneous and peak day demand plus fire
flow scenarios.
Exception for Water Line and Sewer line crossing:
The water lines are anticipated to cross the sanitary sewer force main in 12 locations.  Specifically in the following locations where the new water lines will be sleeved:
9+83 (Sheet C-300-01)
18+34 (Sheet C-300-03)
20+87 (Sheet C-300-04)
21+56 (Sheet C-300-04)
72+50 (Sheet C-400-04)
91+87 (Sheet C-400-06)
96+88 (Sheet C-400-07)
102+20 (Sheet C-400-08)
107+12 (Sheet C-400-08)
132+28 (Sheet C-400-11)
194+25 (Sheet C-400-18)
301+48 (Sheet C-400-31) will not meet the required 10 feet of horizontal distance from sewer line. Every effort will be made to mitigate the cross-connection issue by requiring sewer
main to be enclosed in a continuous sleeve and the water main will be jointless and enclosed in a sleeve until 10 feet of horizontal separation is met.
Based on these mitigation measures mentioned above at each twelve locations, the propositions meet the intent of the rule. On this basis, an exception to R309-550-7, Separation of Water

Mains and Sewer Lines from Sewers and Other Pollution Sources is hereby granted for these locations for this Pipeline Project.

Marina Chlorinator (TP001)
The new Marina Chlorinator (TP001) will be completed according to the following:
The Marina Chlorinator (TP001) is a sodium hypochlorite facility adding sodium hypochlorite solution of 12.5 concentration using Blue White M2 FLEXFLO-Peristaltic Pump, Max Flow: 19
GPH @125 PSI. It can pump as low as 0.0085 GPH per manufacturer’s technical data sheet.  The anticipated minimum concentration to dose will be 0.5 ppm as mentioned in the CT spreadsheet.

This chlorinator is to provide secondary disinfection in the distribution system to boost the chlorine residual from the Marina Storage Tank (ST001)
The Blue White M2 FLEXFLO pump has a rated injection capacity in the range 0.0085 to 19 gallons per hour (gph) @125psi.
Chlorine is directly injected into the drinking water storage tank where it is mixed by the tank mixer and then the booster pumps pump into the distribution system. Distribution water
goes to the Marina which has restrooms, maintenance shops, visitor, RV camp sites, and different connections for the docks. Distribution water also goes to the Great Saltair which has
fire sprinklers, restrooms, concession stands, and break room/kitchen area.
The point of entry (POE) for this chlorinator will be located on the discharge side of the booster pump after chlorination.
The sodium hypochlorite 12.5% solution for disinfection meets the ANSI/NSF 60 standard.
The sodium hypochlorite 12.5% solution is stored in a 60-gallon tank (ANSI/NSF 61 certified) with spill containment. There is a bulk 60-gallon tank which will have a spill containment
tray and scale.
The target dose of 0.418 gallons per day (gal/day) 12.5% Sodium hypochlorite is based on treating approximately 105,000 gal/day.  This is anticipated to treat a maximum flow of 72.6
gpm delivered to the tank from Salt Lake City’s Water System to achieve a minimum 0.5 ppm.
The chlorine dose is adjusted by an automatic sensor-based flow control pump. Please include how it is done. The Smart Controller (SCC) uses an operator setpoint for the disinfection
level and continuously monitors the water quality data from the Water Quality Station (WQS). When disinfectant levels fall below the set point, the SCC commands the chemical feed skid
to precisely add disinfectant to maintain uniform and consistent water quality inside the tank. Power/control connections to the chemical dosing pump are provided via an analog and/or
digital signal or a direct 110V outlet activated by the SCC.
Chlorine will be injected directly into the tank using the injection stem assembly mounted on the mixer. The system is controlled by the SCC based on the disinfection residual in the
tank. The SCC has an extensive Alarm Management System built into the software that will alert the user of irregularities within the system and produce an automated response, from an
alert on the screen to system shut down, to ensure safe operating conditions.
The target chlorine residual is a minimum of 0.5ppm.
Secondary Disinfection Requirements
The plan review of the proposed Marina Chlorinator (TP001) is based on providing secondary disinfection. When this chlorinator is installed and placed in operation after the Operating
Permit issuance, the GSL Park will be required to demonstrate ongoing compliance with the secondary disinfection requirements that are outlined below.
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 GSL Park is found to requireadditionaldisinfection 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 virus inactivation in accordance with the Ground Water Rule in R309-215-16.
Chlorine Monitoring & Reporting Requirements
The water system will be required to meet secondary 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.
Secondary Disinfection Requirements and Reporting
Chlorine Residual ‒ Point of Entry (POE) to Distribution System
The POE sampling location will be identified in the Division’s database as EP001. The specific location will need to be provided to the Division during the operating permit process.
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 value of chlorine residual measured as free chlorine at the POE sampling location (EP001). [R309-215-10(1)]
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 secondary disinfection requirements, the water system must complete monthly operational reports for each active chlorinator using a template approved
by the Division.
The monthly operational reports are submitted quarterly. The reports are due to the Division by the 10th day following the end of each reporting quarter (i.e., January 10th, April 10th,
July 10th and October 10th). The reports can be submitted by hardcopy, fax, or by uploading them to the Division’s chlorine residual reporting form which can be found at MRDL.utah.gov.
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)]
We have completed our review of the plans and specifications, stamped, and signed by Robert Rousselle, P.E., and dated February 26, 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 the Marina Storage Tank (ST001), Marina Booster station (PF 001), Marina

Chlorinator (TP001) and GSL Marina Water Line Project; Exception to R309-550-7(1) Minimum Separation Requirements project are hereby approved.
This approval pertains to construction only. An Operating Permit must be obtained from the Director before this Water Line project 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, please contact Nagendra Dev, P.E., of this office, at [phone], or me, at [phone].
Sincerely,
Michael Newberry, P.E.
Permitting and Engineering Support Manager
ND/mrn/mdb
Enclosures –Operating Permit Checklistcc:Matthias Neville, Salt Lake County Health Department, [e-mail] Shearer, GSL State Park, [e-mail] Rousselle,
P.E., Ensign Engineering, [e-mail] Dunkel, Ensign Engineering, [e-mail] Harsh, Department of Natural Resources, [e-mail] Treutel,
Division of Drinking Water, [e-mail] Dev, P.E. Division of Drinking Water, [e-mail] NDev PA GSL Marina WL Project 18135 19874
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