DDW-2024-011325

September 25, 2024
Margo Provost
Log Haven Restaurant
6451 Mill Creek Road
Salt Lake City, Utah 84109
Subject:ConditionalPlan Approval, Log Haven Restaurant DosatronChlorinator, Dosatron Chlorinator (TP002); Log Haven Restaurant, System #18098, File #14428
Dear Margo Provost:The Division of Drinking Water (the Division) received the plans for the proposed installation of a Dosatron Chlorinator from your consultant, Brent Thomas and Thomas
Engineering Company on May 13, 2024. Additional submittals and comments were received between May 13, 2024, and September 18, 2024. Written review comments were provided to your consultant
on May 28, 2024. The Division received the revised plans and specifications on July 8, 2024. This project has met the conditions for receiving a conditional plan approval.
The letter includes the following sections and addenda:

Project Summary for Dosatron Chlorinator (TP002)    
Conditional Plan Approval for Dosatron Chlorinator (TP002)
Secondary Disinfection Requirements
Operating Permit Checklist 
Future Monitoring and Reporting Requirements (Addendum 1)Project Summary
Our understanding of the project is that Log Haven Restaurant has been batch chlorinating and is electing to install the Dosatron Chlorinator (identified as TP002 in the Division’s database)
to achieve compliance, as well as to achieve secondary disinfection of the flow from the Log Haven Spring (WS001).
The plan review of the proposed Dosatron Chlorinator (TP002) has been completed according to the following:
The proposed Dosatron Chlorinator (Model D40WL3000NAF) is an NSF/ANSI 61-certified, water-powered liquid chlorine injector, adding 0.0525% sodium hypochlorite solution, diluted from
a 5.25% bulk solution.
This chlorinator will add chlorine to the water from Log Haven Spring (WS001).
This chlorinator is intended to provide secondary disinfection in the distribution system. 
Source water is gravity-fed from the Log Haven Spring to Log Haven Restaurant. The Dosatron chlorinator will be installed in the basement of the restaurant, where the source water enters
the restaurant building. The chlorinated water will then enter the distribution system directly.
The proposed sodium hypochlorite for disinfection meets the ANSI/NSF 60 standard.
The proposed design target dose will be between 0.2 mg/L and 4 mg/L (measured as free chlorine) and is based on a minimum flow of 5 gallons per minute (gpm) and a maximum flow of 33
gpm from Log Haven Spring (WS001).
The chlorine dose will be adjusted by turning a dial on the Dosatron unit and aligning the dial position according to the dosage rate, labeled as percent flow. The Dosatron unit will
inject the diluted sodium hypochlorite at a constant proportion of flow according to the flow through the source water pipe.
The Point of Entry (POE) sampling location will be DESCRIPTION (Continuous analyzers required for all systems with a population over 3,300).
Conditional Plan Approval for Dosatron Chlorinator (TP002)
This approval pertains to construction only. An Operating Permit must be obtained from the Director before Dosatron Chlorinator may be put in service. A checklist outlining the items
required for operating permit issuance is enclosed for your information.
We have completed our review of the plans and specifications, stamped, and signed byBrent Thomas, P.E., dated September 23, 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, we hereby approve the proposed plans to construct Dosatron Chlorinatorwith the following conditions:
Log Haven Restaurant submits a target dose to the Division prior to or with an Operating Permit request. The target dose shall be at least 0.2 mg/L (or ppm) and shall not exceed 4 mg/L
(or ppm), measured as free chlorine.
Log Haven Restaurant collects monitoring samples during anticipated low flow instances. Monitoring and reporting shall be in compliance with the requirements in Addendum 1.
Log Haven Restaurant creates and follows a Standard Operating Procedure (SOP) to flush the distribution system each morning at the time of opening by turning on faucets in the restaurant
for a short period of time.
Log Haven Restaurant follows all Operation and Maintenance procedures recommended by Dosatron.
You must fulfill and comply with all of the conditions of approval,or this approval is invalid.
This conditional approval pertains to construction only. An Operating Permit must be obtained from the Director before Dosatron Chlorinator 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, a 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.
Secondary Disinfection Requirements
The plan review of the proposed Dosatron Chlorinator (TP002) is based on providing secondary disinfection. When this chlorinator is installed and placed in operation after the Operating
Permit issuance, the Log Haven Restaurant will be required to demonstrate ongoing compliance with the secondary disinfection requirements that are outlined in Addendum 1 to this letter.
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 Log Haven Restaurant is found to require additional disinfection 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.
If you have any questions regarding thisconditional plan approval, please contact Rebecca Yoo, P.E., of this office, at [phone], or me at [phone].
Sincerely,
Michael Newberry, P.E.
Permitting and Engineering Support Manager
RY/mrn/mdbEnclosures –Operating Permit ChecklistAddendum 1- Future Monitoring and Reporting Requirementscc:Matthias Neville, Salt Lake County Health Department, [e-mail]

Thomas, P.E., Thomas Engineering Company, [e-mail] Provost, Log Haven Restaurant, [e-mail] Yoo, P.E., Division of Drinking Water, [e-mail]
Luke Treutel, Division of Drinking Water, [e-mail]
David Kruse, Division of Drinking Water, [e-mail]
Sitara Federico, Division of Drinking Water, [e-mail]
Nagendra Dev, P.E., Division of Drinking Water, [e-mail] 18098 14428 Log Haven (GW Secondary 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 (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
Addendum 1
Future Disinfection Monitoring and Reporting Requirements
Chlorine Monitoring & Reporting Requirements
The water system will be required to meet elective 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.
Elective 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. The location will be identified during the plan approval 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 (EP002). [R309-215-10(1)]Our records show that your water system serves
100 people. Please be aware that R309-215-16(3)(b)(iii)(A)(II) requires water systems serving 3,300 people or fewer to monitor the POE chlorine residuals and take daily grab sample(s).
Alternatively, instead of taking daily grab samples, a groundwater system serving 3,300 or fewer people may choose to use an online analyzer to continuously monitor the POE chlorine
residuals entering the distribution system.
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 elective disinfection requirements, the water system must complete monthly operational reports for each active chlorinator using a template approved
by the Division.
Operational reports are submitted quarterly. The reports are due to the Division by the 10th day following the end of each reporting month or quarter (i.e., January 10th, April 10th,
July 10th and October 10th for quarterly reports). The reports can be submitted by hardcopy, fax, or email at [e-mail]. 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)]