DDW-2025-003012

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 DIEDRE HENDERSON Lieutenant Governor
Department of Environmental Quality
Tim Davis Executive Director DIVISION OF DRINKING WATER Nathan Lunstad, Ph.D., P.E. Director
March 14, 2025

Thomas Isom Erda Acres Water Co PO BOX 11 Tooele, UT 84071
Subject: Notice of Decreased Monitoring for Erda Acres Water Co; UTAH23053 Thomas Isom:
This letter serves as notification that quarterly monitoring for nitrate is no longer required at the
Sampling Station – 02 03 (identified as SS255). Sampling Station – 02 03 (SS255) is a sampling point which represents the combined flows of Well #2 Nelson (WS002) and Well #3 Campbell (WS003). A nitrate sample is now annually.
The next nitrate sample from the Sampling Station – 02 03 (SS255) is due sometime between
January 1, 2025, and December 31, 2025. Sampling Station – 02 03 (SS255) was placed on a quarterly nitrate monitoring schedule in April 2018 after a concern was identified in the source protection plan update at that time. Erda Acres
Water Co has since collected seven years of quarterly nitrate samples. The results of these samples
show consistent nitrate concentrations ranging from 3 to 4mg/L. Based on this, the Sampling Station – 02 03 (SS255) qualifies for reduced nitrate monitoring under R309-205-5. The updated monitoring requirements for the Sampling Station – 02 03 (SS255) 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
SS255 Sampling Station – 02 03 Nitrate 1 Yearly 01/01/2025-12/31/2025 R309-205-5(4)(a)
Volatile Organic
Contaminants 1 Every three years 01/01/2023-
12/31/2025
R309-205-
6(2)
Inorganics & Metals 1 Every three years 01/01/2023-12/31/2025 R309-205-5(3)(a)
Thomas Isom 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)
Pesticides 1 Every three years 01/01/2023-12/31/2025 R309-205-6(1)(f)
Radionuclides 1 Every six years 01/01/2020-12/31/2025 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 Section Manager
Enclosure: Monitoring Schedule
cc: Thomas Isom, Erda Acres Water Co, [e-mail]
Taylor Palmer, Tooele County Health Department, [e-mail]
Mark Berger, Division of Drinking Water, [e-mail]
John Steffan, Division of Drinking Water, [e-mail]
David Kruse, Division of Drinking Water, [e-mail]