DDW-2024-013407

November 20, 2024
Ted Mickelsen
Woodland Hills City
200 South Woodland Hills
Woodland Hills, Utah 84653
Subject:After-the-Fact Operating Permit, Broad Hollow Chlorinator (TP002);
Woodland Hills City, System #25028, File #16805
Dear Ted Mickelsen:
The Division of Drinking Water (the Division) identified an unapproved gas chlorination facility during your system’s 2024 Sanitary Survey on August 29, 2024. Division staff inspected
the facility and compiled a photo log on September 26, 2024. The Division received additional chlorine dose information on November 18, 2024. This project has met all conditions for
receiving an after-the-fact operating permit.
Our understanding is that the System constructed a gas chlorination facility intended to provide elective disinfection of the Broad Hollow Tank Well (WS006). The chlorinator consists
of two 150-pound chlorine gas tanks in a chlorination room attached to the Broad Hollow Tank Well house. The chlorine gas is fed to a 1-inch diameter chlorinator supply line which is
pumped out of the Broad Hollow Tank Well discharge line by a small booster pump. The Broad Hollow Chlorinator is identified as TP002 in the Division’s database.
The Broad Hollow Chlorinator (TP002) included in this project has been completed according to the following:
The Broad Hollow Chlorinator is a gas chlorinator intended to provide secondary disinfection.
The Broad Hollow Chlorinator treats water from the Broad Hollow Tank Well (WS006). The chlorine gas is added to the water at the Broad Hollow Tank Well house.
The chlorinated water then enters Broad Hollow Tank (ST004) and flows into the distribution system.
The chlorine gas used for disinfection meets the ANSI/NSF 60 standard.
A design target dose of 0.4 mg/L (ppm) of free chlorine is based on a typical flow of 750 gallons per minute (gpm) from Broad Hollow Tank Well.
The chlorine dose is adjusted with a manually adjusted rotometer set for the flow from Broad Hollow Tank Well.
We have the following information for Broad Hollow Chlorinator:
Division staff conducted a sanitary survey of your water system on August 29, 2024.
Division staff conducted a follow-up inspection of the Broad Hollow Chlorinator on September 26, 2024.
Division staff compiled a photo log of the Broad Hollow Chlorinator.
We have determined that all conditions for issuing an operating permit have been met. On this basis, an After-the-FactOperating Permit for Broad Hollow Chlorinatoris hereby issued as
constituted by this letter. You may keep the Broad Hollow 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
Woodland Hills Cityis not required to disinfect the Broad Hollow Tank Well (WS006) based on bacteriological source sample results currently available. The water systemhas elected to
install the Broad Hollow Chlorinator (TP002) to provide a detectable disinfectant residual in the distribution system for secondary disinfection.
Please be aware that, if any water source of Woodland Hills City is 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.
Woodland Hills Cityis required to demonstrate ongoing compliance with the secondary disinfection requirements outlined in Addendum 1 of this letter as long as the Broad Hollow Chlorinator
(TP002) is in operation.
Monitoring and ReportingIssuance of this Operating Permit changes your water system’s monitoring and reporting requirements. The staff of the Rules Section will follow up to provide
an updated monitoring schedule to you. Please contact Mark Berger, Water Quality/Monitoring and Standards Manager at [phone] for questions regarding the monitoring and reporting
requirements for your water system.
Source Bacteriological Monitoring (WS006)
This water system is required to take monthly bacteriological samples of the Broad Hollow Tank Well (WS006) prior to any treatment, for the months the well is (in operation or accessible).
The source sampling requirement shall begin in January 2025 and continue for a minimum of 12 months.
The purpose of the source sampling requirement is to gather data to evaluate the quality of the source water from Board Hollow Tank Well (WS006) and determine whether primary disinfection
treatment is required or not.
Label the source samples with WS006 as the sampling location.
The required source bacteriological sampling is shown on your monitoring schedule for this sample site. Please note that the source sampling is in addition to the distribution system
bacteriological sampling already in place, which is labeled DS001.
After a minimum of 12 months of source sampling data become available, the Division will evaluate the results to determine whether primary disinfection is required for Broad Hollow Tank
Well (WS006) and if more sampling data needs to be collected.
There may be new changes in monitoring and reporting requirements in the future as the Division continues to improve the disinfection monitoring and reporting practices. Failure to adhere
to required monitoring and reporting will result in violations and the assessment of IPS points.The issuance of this Operating Permit resolves your water system’s G001 deficiency related
to having an unapproved facility in service. An updated IPS report isavailable at https://waterlink.utah.gov. Please contact Jennifer Yee at [phone] or [e-mail] for questions
related to your water system’s IPS report or deficiencies.
If you have any questions regarding this Operating Permit, please contact Hunter Payne, of this office, at [phone], or Michael Newberry, Permitting and Engineering Support Manager,
at [phone].
Sincerely,
Russell Seeley, P.E.
Assistant Director
HP/mrn/mdbcc:Daymon Swenson, Utah County Health Department, [e-mail] Mickelsen, Woodland Hills City, [e-mail] Martin, Division of Drinking Water,
[e-mail] Arns, Division of Drinking Water, [e-mail] Payne, Division of Drinking Water, [e-mail] Treutel, Division of Drinking Water, [e-mail]

Federico, Division of Drinking Water, [e-mail] Yee, Division of Drinking Water, [e-mail] 25028 16805 TP002 ATF OP
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 online analyzer in the nearby well house. 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 1,605 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)]