DDW-2025-005621

195 North 1950 West • Salt Lake City, UT Mailing Address: P.O. Box 144830 • Salt Lake City, UT 84114-4830 Telephone [phone] • Fax [phone] • T.D.D. [phone]
www.deq.utah.gov Printed on 100% recycled paper
State of Utah

SPENCER J. COX Governor DEIDRE HENDERSON Lieutenant Governor
Department of Environmental Quality
Tim Davis Executive Director DIVISION OF DRINKING WATER Nathan Lunstad, Ph.D., P.E. Director
May 20, 2025

Robert Allen Oak Haven Water Company 1121 N Willow Midway, UT 84049
Subject: Notice of Decreased Monitoring for Oak Haven Water Company, UTAH26043 Robert Allen:
This letter serves as notification that quarterly monitoring for radionuclides is no longer required from the Arsenic Treatment Facility (identified as TP003). A radionuclide sample collected from the Arsenic Treatment Facility (TP003) is now required once every nine years. The next radionuclide sample is due sometime between April 1, 2029 and June 30, 2037.
Following the issuance of an operating permit the Arsenic Treatment Facility (TP003) was placed on a quarterly monitoring requirement to fulfill the initial monitoring requirements given in R309-205-7(1)(b). A sufficient number of radionuclide samples have been collected to qualify this source for reduced monitoring.
The updated source chemical monitoring requirements for the Arsenic Treatment Facility (TP003) are given below and are available to view anytime on waterlink.utah.gov. Please contact David Kruse at [e-mail] or 385-566-7789 for questions regarding the source chemical monitoring requirements for this system.

Facility with new requirements Analyte(s) Required # of Samples Sampling Frequency Next Due Date Rule Reference
TP003
Arsenic Treatment
Facility
Arsenic 1 Monthly 05/01/2025-05/31/2025
R309-2215-6(2)(a)
Nitrate 1 Yearly 01/01/2025-12/31/2025
R309-205-
5(4)(a)
VolatileOrganic Contaminants 1 Yearly 01/01/2025-12/31/2025 R309-205-6(2)
Robert Allen Page 2 of 2
May 20, 2025

Inorganics & Metals 1 Every three years 01/01/2026-12/31/2028
R309-205-5(3)(a)
Sulfate, Sodium, TDS 1 Every three years 01/01/2023-12/31/2025
R309-205-5(3)(a)
Pesticides 1 Every three years 01/01/2023-12/31/2025
R309-
205-6(1)(f)
Radionuclides 1 Every nine years 01/01/2029-12/31/2037
PFAS Collect (1) sample every 5-7 months during a 12 month period for a total of 2 samples by April 26, 2027.
40 CFR 141 (2024)
PFAS Information and Resources The EPA rule for PFAS requires that either method 533 or 537.1 version 2 are used for testing. Please ensure that the chosen laboratory processes PFAS samples using one of these methods. Additionally, the Division has resources to assist water systems in completing the PFAS initial
monitoring requirements. For more information on the resources the division can provide related to PFAS initial monitoring please visit ddwpfas.utah.gov. For PFAS related questions, please contact John Steffan at [e-mail] or [phone]. Sincerely,

Mark Berger
Monitoring and Standards Implementation Manager
Enclosure – Monitoring Schedule cc: Robert Allen, Oak Haven Water Company, [e-mail]
Tracy Richardson, Wasatch County Health Department, [e-mail] Mark Berger, Division of Drinking Water, [e-mail] David Kruse, Division of Drinking Water, [e-mail] John Steffan, Division of Drinking Water, [e-mail] [e-mail]