DDW-2025-002267

March 10, 2025
Margo Provost
Log Haven Restaurant
6451 Mill Creek Road
Salt Lake City, Utah 84109
Subject:Operating Permit, Log Haven Restaurant Dosatron Chlorinator, Dosatron Chlorinator (TP002); Log Haven Restaurant, System #18098, File #14428
Dear Margo Provost:
The Division of Drinking Water (the Division) received a request for an Operating Permit for Log Haven Restaurant Dosatron Chlorinator from you on February 7, 2025. Additional information
was requested on February 11, 2025. The Division issued Plan Approval for this project on September 25, 2024. Division staff Rebecca Yoo conducted an onsite construction inspection of
this project on March 3, 2025. This project has met all conditions for receiving an operating permit.
Project Summary
Our understanding of the project is that Log Haven Restaurant has been batch chlorinating and elected 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 Dosatron Chlorinator (TP002)included in this project 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 0.5 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 immediately downstream of the chlorinator.
We have received the following information for Log Haven Restaurant Dosatron ChlorinatorDosatron Chlorinator (TP002):
Certification of Rule Conformance with plan approval conditions by a professional engineer
As-built or record drawings.
Satisfactory bacteriological results as evidence of proper disinfection and flushing.
Evidence of operation and maintenance manual delivery.
Target dose of 0.5 mg/L, measured as free chlorine.
Standard Operating Procedure (SOP) to flush the distribution system each morning at the time of opening.
System O&M, water quality sampling, and water quality reporting plan
We have determined that all conditions for issuing an operating permit have been met. On this basis, an Operating Permit for Log Haven Restaurant Dosatron Chlorinatoris hereby issued
as constituted by this letter. You may now place the Dosatron Chlorinator (TP002) in service in your water system.
Please maintain a copy of this letter with your permanent records for future reference.
Secondary Disinfection Requirements
The Log Haven Restaurantis not required to disinfect the Log Haven Spring (WS001)based on bacteriological source sample results currently available. The water systemhas electively installed
the Dosatron Chlorinator (TP002) to provide a detectable disinfectant residual in the distribution system for secondary disinfection.
Please be aware that, if any water source of the Log Haven Restaurantis found to require primary disinfection in the future per R309-200-5(7)(a)(i), additional regulations will apply.
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.
The Log Haven Restaurantis required to demonstrate ongoing compliance with the secondary disinfection requirements outlined in Addendum 1 of this letter as long as the Dosatron Chlorinator
(TP002)is in operation.
If you have any questions regarding this Operating Permit, please contact Rebecca Yoo, P.E., of this office, at [phone], or Michael Newberry, P.E., Permitting and Engineering
Support Manager, at [phone].
Sincerely,
Russell Seeley, P.E.
Assistant Director
RY/mrn/mdbcc:Matthias Neville, Salt Lake County Health Department, [e-mail] Brent Thomas, P.E., Thomas Engineering Company, [e-mail] Margo Provost, Log Haven Restaurant,
[e-mail] Rebecca 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] Yee, Division of Drinking Water, [e-mail]
18098 14428 OP Log Haven _ Dosatron
Addendum 1 
Elective Monitoring and Reporting Requirements 
Chlorine Monitoring & Reporting Requirements
The water system is required to meet elective disinfection requirements. As a part of these requirements, the water system is required 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 is identified as EP002 in the Division’s database. This location has been identified as the sample tap downstream from the Dosatron. 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 chlorine residual concentration, measured as free chlorine, at the chlorinator POE sampling location a minimum of daily. [R309-210- 8(3)(a)(ii)]
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 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)]