DERR-2024-009814

195 North 1950 West • Salt Lake City, UT
Mailing Address: P.O. Box 144840 • Salt Lake City, UT 84114-4840
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 ENVIRONMENTAL
RESPONSE AND REMEDIATION

Brent H. Everett
Director

ERRC-117-24

August 9, 2024

Ryan Dunham
Site Assessment Manager
EPA Region 8 (8EPR-B)
1595 Wynkoop Street
Denver, Colorado 80202-1129

Dear Mr. Dunham:

Enclosed is the final Analytical Results Report (ARR) for the Holladay Village PCE (SEMS
EPA ID UTN000820932) (herein referred to as “Site”) located in Holladay, Salt Lake County, Utah.
The Site includes two areas, north and south, where PCE (tetrachloroethylene) was detected in soil
samples during a 2008 Environmental Site Assessment (ESA) conducted during city improvement
projects by the City of Holladay. A Preliminary Assessment (PA) was completed by the Utah
Department of Environmental Quality (DEQ) in 2018 that recommended further investigation to
determine if PCE was posing a threat of sol vapor intrusion (SVI) to businesses near known PCE
contamination. A Site Investigation Work Plan (SIWP) and SIWP Addendum (SIWPA) were then
conducted by the DEQ in 2022 and 2023 to identify if SVI was occurring at properties nearby and
adjacent to the Site.

The SIWP sought to assess current conditions at the Site, characterize the location and
spread of contamination, and identify receptors and exposure pathways associated with
contamination at the Site. The SIWPA sought to address data gaps identified by the SIWP sampling
and determine if properties near the Site were impacted by SVI.

During the SIWP, PCE was detected in soil and soil gas samples. Soil sample detections
were below screening levels and the risk of exposure via the soil pathway is unlikely; however, soil
gas samples exceeded screening levels which prompted additional sampling. During the SIWPA,
sub-slab soil gas, indoor air, and outdoor air samples were collected and all showed detections of
PCE. Outdoor air samples were below screening levels and the risk of exposure via the outdoor air
pathway is unlikely. Sub-slab soil gas samples collected from south area of the Site (within Meier’s
Catering) showed elevated levels of PCE; however, the indoor air samples did not show detections
of PCE above screening levels. Sub-slab soil gas samples collected from the north area of the Site
Page 2

(within Burton Lumber) showed significantly elevated levels of PCE, with the basement indoor air
sample having elevated levels of PCE and the main floor indoor air having detections of PCE just
below screening levels.

At both locations, Burton Lumber and Meier’s Catering, SVI was observed. Additional
sampling was requested after the SIWPA was completed to further evaluate if indoor air was
impacting human health; however, sampling access was denied at both locations and no further
sampling will be conducted. The ARR concludes that the primary pathway of concern at the Site is
the SVI pathway through the volatilization of chlorinated solvents. Further investigations under
CERCLA are not planned for the future due to the denial of access to the site; therefore, the Division
of Environmental Response and Remediation recommends a designation of No Further Remedial
Action Planned for the Site.

Thank you for your attention to this matter. If you have any questions, please contact me at
[phone], or via email at [e-mail].

Sincerely,

Michael Swistak, Site Assessment Project Manager
Division of Environmental Response and Remediation

MS/tt

Enclosure: Holladay Village PCE Analytical Results Report

cc: Dorothy Adams, Executive Director, Salt Lake County Health Department
Ron Lund, Environmental Health Director, Salt Lake County Health Department