DERR-2025-004762

SITE VISIT REPORT
DATE: 06/02/2025
SITE: Former PacifiCorp Carbon Power Plant VCP #095
SITE ADDRESS: 75th Avenue, Helper, UT
PREPARED BY: Allison Stanley
Utah Department of Environmental Quality
Division of Environmental Response and Remediation
195 North 1950 West
Salt Lake City, UT 84116

ATTENDEES: Allison Stanley (DERR), Bill Rees (DERR), Peter Brinton (PacifiCorp)
ARRIVAL TIME: 1430 - DEPARTURE TIME: 1550

SUMMARY:
DERR met Peter Brinton of PacifiCorp on-site to oversee the implementation of the Materials
Management Plan (MMP) during the installation of the Helper City water line. While most work
has been outside the Voluntary Cleanup Program (VCP) boundaries (3000 West and Highway
191), DERR previously instructed PacifiCorp to adhere to the MMP for any work within VCP
limits.
Upon arrival, DERR observed crews trenching beneath the right-of-way between 3000 West and
Highway 191, where they encountered buried railroad ties with visible staining and odor. Given
the uncertainty about whether this right-of-way was within VCP boundaries, DERR emphasized
the critical importance of proper management and disposal of the impacted soil and rail ties, even
if outside the VCP. DERR and PacifiCorp then inspected other trenched areas of the site, noting
the widespread presence of coal combustion residual (CCR) material and unburned coal in both
trenches and on the surface.

PHOTO LOG:

Photo 1: Railroad ties pulled from beneath the pavement near Highway 191 for water line
project.

Photo 2: Observed coal and CCR in one of the trenches.