DSHW-2024-007604

August1, 2024
Mr. Tom Henriod
Rockworth Companies, LLC
4655 South 2300 East, Suite 205
Holladay, UT 84117
RE: Acknowledgement ofUpdated Monitoring Well Installation and Quarterly Groundwater Monitoring Report, 21st and 21st Properties
2100 South and 2100 East Salt Lake City, Utah 84109
UTCA-0032
Dear Mr. Henroid:
The Division of Waste Management and Radiation Control (Division) has receivedthe UpdatedMonitoring Well Installation and Quarterly Groundwater Monitoring Report,June 12, 2024(Report)
for the 21st& 21st Properties located at 2100 South 2100 East, Salt Lake City, Utah (Site).This Report has been provided in response to the May 30, 2024, Division comments.
On July 29, 2024 the Second Quarter 2024 Groundwater Monitoring Report was submitted to the Division with updated contaminants of potential concern (COPC) concentrations and the most
recent, up to date Site status conditions. With the submittal of the Q2 report, the Division will proceed with reviewing the most recent data and evaluate the Site based on the current
conditions provided. The Division acknowledges the receipt of the Report and would like to thank you for your effort to protect human health and the environment in the State of Utah.

If you have any questions, please call Ethan Upton at [phone].
Sincerely,
Paige Walton, Program Manager Corrective Action
Division of Waste Management and Radiation Control
PW/EAU/
Enclosure:
c:Dorothy Adams, Interim Health Officer, Salt Lake County Health Dept.
Ron Lund, Environmental Health Director, Salt Lake County Health Dept.
Eric Peterson, Environmental Health Deputy Director, Salt Lake County Health Dept.
Eileen Brennan, Division of Environmental Response and Remediation, ([e-mail])
Andrew Turner, Terracon Consultants, Inc. ([e-mail])
Tom Henroid, Rockworth Companies ([e-mail])