DDW-2024-014764

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 Nathan Lunstad, Ph.D., P.E. Director
December 23, 2024

Steve Mcintosh Solitude Mountain Ski Area LLC 12000 Big Cottonwood Canyon Rd. Solitude, UT 84121

Subject: Notice of Increased Monitoring Requirements for Solitude Mountain Ski Area LLC, UTAH18047
Steve Mcintosh: According to the Division of Drinking Water’s (the Division) records, an antinomy sample was
collected from the Alta Drain Tunnel Spring (identified as WS001) on November 5, 2024. The results of the analysis show antinomy was detected at 0.0146mg/L. This is above the maximum contaminant level (MCL) for antinomy. The MCL for antimony is 0.006mg/L. This result triggers increased monitoring requirements for antimony. An antimony sample is now
required from the Alta Drain Tunnel Spring (WS001) each quarter that Alta Drain Tunnel Spring provides water to the distribution system. Compliance with the antimony MCL is based on the Running Annual Average (RAA) of quarterly samples. After four quarters of sampling, if the average is greater than the MCL, then
the system is out of compliance and public notice pursuant to R309-220 will be required. If any
one sample would cause the annual average to be exceeded (the sample result is four times the MCL), then the system is out of compliance immediately. The updated monitoring requirements for the Alta Drain Tunnel Spring (WS001) is given below.
An updated monitoring schedule can be viewed any time at waterlink.utah.gov under the Water
Monitoring section.

Steve Mcintosh Page 2 of 2
December 23, 2024

Facility with new requirements Analyte(s) Required # of samples Sampling Frequency Next Due Date Rule Reference
WS001 Alta Drain Tunnel Spring Antimony 1 Quarterly 01/01/2025-03/31/2025 R309-205-5(3)(a)
Nitrate 1 Yearly 01/01/2025-12/31/2025 R309-205-5(4)(a)
Volatile Organic Contaminants 1 Yearly 01/01/2025-12/31/2025 R309-205-6(2)
Inorganics & Metals 1 Every three years 01/01/2026-12/31/2028 R309-205-5(3)(a)
Sulfate, Sodium, TDS 1 Every three years 01/01/2026-12/31/2028 R309-205-5(3)(a)
Pesticides 1 Every three years 01/01/2026-12/31/2028 R309-205-6(1)(f)
Asbestos 1 Every nine years 01/01/2029-12/31/2037 R309-205-7(1)(c)
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: Steve Mcintosh, Solitude Mountain Ski Resort LLC, [e-mail] Fuaah Hararah, Salt Lake County Health Department, [e-mail]
Mark Berger, Division of Drinking Water, [e-mail] David Kruse, Division of Drinking Water, [e-mail]