DERR-2024-007382

195 North 1950 West
Mailing Address: P.O. Box 144840 Salt Lake City, UT 84114-4840
Telephone [phone] ) 359-8853 [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-076-24

May 22, 2024

Mike Gronseth
Senior Environmental Project Manager
Kleinfelder
849 West Levoy Drive, Suite 200
Taylorsville, Utah 84123

Re: Soil Management Report Butterfield Canyon Trailhead Construction, Salt Lake
County Parks & Recreation, Herriman, Utah

Dear Mr. Gronseth:

The Division of Environmental Response and Remediation (DERR) received the Soil
Management Report Butterfield Canyon Trailhead Construction, dated April 17, 2024. This
document reports on the construction activities and resulting soil management activities conducted
at the Butterfield Canyon Trailhead property located within the Kennecott South Zone Operable
Unit 3.

The report noted that soils exceeding the Recreational Land Use Standard of 2,207 mg/kg
lead remained in place when a minimum of two feet of clean fill was placed over the contaminated
soils. The areas near the creek were graded. In these areas, one foot of impacted soils was removed
and two feet of backfill was placed. In addition, orange construction plastic fencing was installed
as a marker barrier to delineate between native soils and clean fill material. The DERR recommends
regularly monitoring these delineated areas for visible signs of the orange marker barrier and
managing any daylighting instances as appropriate under the Salt Lake County maintenance plans
for the trail system. Continued monitoring of the trailhead will ensure that the remedy remains
protective to the public.

Page 2
Based on our review of the Soil Management Report, this document has been accepted by
the DERR. If you have any questions, please contact me at [phone].

Sincerely,

Mazie J. Cox, Project Manager
Division of Environmental Response and Remediation

MJC\lg

ecc: Hayley Shaffer, Salt Lake County Health Department
Dustin Wiberg, Salt Lake County Parks and Recreation
Ron Lund, Environmental Health Director, Salt Lake County Health Department
Dorothy Adams, Interim Executive Director, Salt Lake County Health Department