DDW-2025-002959

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
March 14, 2025
Randy Nelson Thatcher-Penrose Service District 10040 N 11600 W Tremonton, UT 84337
Subject: Notice of Decreased Monitoring, Grouped Source Sampling Station for Thatcher-Penrose Service District; UTAH02025
Randy Nelson:
On February 25, 2025, Randy Nelson notified the Division of Drinking Water (the Division) that the Thatcher-Penrose well (identified as WS001) and the N Blind Spring Well (WS002) combine in the Bothwell Tank (ST002) prior to servicing any service connections. This configuration
qualifies the Thatcher-Penrose and N Blind Spring Wells to be sampled for contaminants defined in R309-205 collectively from the outflow of the tank. Samples shall be pulled during periods when both sources are actively supplying water to the distribution system.
A sampling location which represents the Thatcher-Penrose (WS001) and N Blind Spring Well
(WS002) wells has been created under the name “Sampling Station – 01 02” (identified as SS001). Please label all samples collected from the location as SS001 on the facility and sample point ID columns.
The updated monitoring requirements for the Sampling Station – 01 02 (SS001) are given below.
An updated monitoring schedule can be viewed any time at waterlink.utah.gov under the Water
Monitoring section.
Facility with new requirements Analyte(s) Required # of samples Sampling Frequency Next Due Date Rule Reference
SS001 Nitrate 1 Yearly 01/01/2025-12/31/2025 R309-205-5(4)(a)
Volatile Organics 1 Every three years 01/01/2025-12/31/2025 R309-205-6(2)
Pesticides 1 Every three years 01/01/2023-12/31/2025 R309-205-6(1)(f)
Paul Ashton Page 2 of 2
March 14, 2025

Sulfate Sodium TDS 1 Every three years 01/01/2023-12/31/2025 R309-205-5(3)(a)
Inorganics and Metals 1 Every three years 01/01/2023-12/31/2025 R309-205-5(3)(a)
Radionuclides 1 Every three years 01/01/2023-12/31/2025 R309-205-7(1)(c
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].
Thank you for your efforts in maintaining a clean drinking water system. Please contact David Kruse at (385)-566-7789 or [e-mail] for questions regarding the source monitoring and reporting requirements for your water system. Sincerely,

Mark Berger
Monitoring and Standards Implementation Manager
Enclosure: Monitoring Schedule cc: Randy Nelson, Thatcher Penrose Service District, [e-mail] Grant Koford, Bear River 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]