DDW-2024-005997

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

Kimberly D. Shelley
Executive Director

DIVISION OF DRINKING WATER
Tim Davis
Director

October 3, 2023

Stephen Biggs
Mountain Springs Water Co
1717 S Badger Way
New Harmony, UT 84757

Subject: Notice of Increased Monitoring for Mountain Springs Water Co: UTAH27077

Stephen Biggs:

According to the Division of Drinking Water’s (the Division) records, a Radionuclide sample was
collected on July 5, 2023 at the Well C-Sawyer (listed as WS003 in the divisions database). In that
sample Gross Alpha Particle Activity was found at levels of 16 pCi/L. The Maximum
Contaminant Level (MCL) for this contaminant is 15 pCi/L. In accordance with R309-205-
7(c)(v), this result requires increased monitoring at Well C-Sawyer (WS003). The monitoring
schedule has been changed, and the following samples are now due each quarter during which
Well C-Sawyer (WS003) provides water to the system: Gross Alpha Particle Activity, Combined
Uranium, Radium-226 and Radium-228. Quarterly monitoring will remain in place until there are
four consecutive quarters of sample results that show levels are reliably and consistently below the
MCL.

Compliance with the Gross Alpha Particle Activity MCL will be determined by calculating the
Running Annual Average (RAA) of Gross Alpha Particle Activity levels collected through
quarterly sampling. If at any point the RAA is greater than 15 pCi/L, a MCL violation will be
issued, and public notice will be required.

Presented below are the updated monitoring requirements for this facility.

Facility with new
requirements
Analyte(s)
Required
# Of
sample
s
Sampling
Frequency
Next Due
Date
Rule
Reference
WS003
Well C-Sawyer
Combined
Uranium 1 Quarterly 10/01/2023-
12/31/2023 R309-205-7
Stephen Biggs
Page 2 of 3
October 3, 2023

Gross Alpha
Particle
Activity
1 Quarterly 10/01/2023-
12/31/2023 R309-205-7
Radium-226 1 Quarterly 10/01/2023-
12/31/2023 R309-205-7
Radium-228 1 Quarterly 10/01/2023-
12/31/2023 R309-205-7
Nitrate 1 Yearly 01/01/2024-
12/31/2024 R309-205-5
Sulfate,
Sodium, TDS 1
Every
Three
Years
01/01/2026-
12/31/2028 R309-205-5
Volatile
Organics 1 Every Six
Years
01/01/2026-
12/31/2031
R309-205-
6(2)
Inorganics
and Metals 1
Every
Three
Years
01/01/2026-
12/31/2028 R309-205-5

You will find a current copy of your complete monitoring schedule at waterlink.utah.gov by
selecting your system and then selecting Water Monitoring under Water System Reports. Thank
you for your efforts in maintaining a safe drinking water system. If you have questions concerning
your sampling requirements, please contact David Kruse at 385-566-7789 ([e-mail]).

Sincerely,

Mark Berger
Monitoring and Standards Implementation Manager

Enclosure – Monitoring Schedule

cc: Stephen Biggs, Mountain Springs Water Co, [e-mail]
Jeremy Roberts, Southwest Utah Health Department, [e-mail]
Paul Wright, DEQ Southwest District Engineer, [e-mail]
Mark Berger, Division of Drinking Water, [e-mail]
David Kruse, Division of Drinking Water, [e-mail]