DERR-2025-001833

SITE VISIT REPORT
DATE: 3/10/2025
SITE: Chromalox
SITE ADDRESS: 2150 North Rulon White Boulevard, Ogden, 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), Michael Ozier (Tetra Tech), Molly Wabel (Chromalox)
ARRIVAL TIME: 2:00 PM - DEPARTURE TIME: 3:30 PM
Split Samples Collected: No
Is the work being performed in a manner consistent with the accepted workplan? Yes

SUMMARY: The purpose of this visit was to observe the low-flow groundwater sampling for
the first bi-annual groundwater event for 2025. The DERR arrived on-site at 2:00 PM and met
with Michael Ozier from Tetra Tech. The DERR was present for the purging and sampling of
monitoring well 10b, along the eastern boundary. It was originally thought that the well ran dry
during purging, but water returned once Michael switched out the tubing. No other issues were
reported for the well and all samples were bagged and placed on ice. At the time of the visit,
Michael was about half way through the monitoring wells. He let me know that MW-12D is still
missing, and MW-16 was obstructed, both likely a result from the recent construction. However,
he was able to collect a sample from MW-19. The DERR also met with Molly Wabel from
Chromalox on-site to discuss the recent expansion. All work was being performed in a manner
consistent with the accepted workplan and QAPP.

PHOTO LOG:

Photo 1: Replacing tubing for MW-10b.

Photo 2: Sampling for MW-10b.

Photo 3: Samples are immediately placed on ice.

Photo 4: Distance from the new building expansion to the east-adjoining property. Monitoring
wells are approximately 5-10 feet from eastern boundary.