DERR-2025-004834

VCP/Brownfields Section - Site Visit Report

SITE NAME: Airport West / North Temple Landfill

SITE LOCATION: Salt Lake City

DATE OF SITE VISIT: 26 June 2025

PURPOSE OF SITE VISIT: DERR (David Bird) oversight of field activities at the Airport West VCP site.

FIELD OBSERVATIONS: On 26 June, at ~10:52 am, the DERR met with ET Design (Sam Bernard) and
Ninigret (Eric Rice, Gary McEntee) at the on-site construction trailer. We visited the Repository where
the placement of landfill waste was proceeding. The compaction process appeared to be effective.
Next we observed the excavation of the 25 foot wide buffer for the Repository footprint. This was at the
northern boundary. The full-time spotter indicated they were collecting PID measurements at roughly
30 to 60 minute intervals, along with observing the excavation for ACM and suspect hazardous waste.
We then traveled toward the east within Phase I and inspected Cell 207 where excavation was on-going.
This cell had very little leachate, whereas Cell 200 where we went next had an area at the south end
with leachate now pumped down to a depth of ~3 feet. The leachate was pumped into a water truck,
and then transported to the leachate pond adjacent to the WAIV unit (leachate evaporation system).
The crushing of concrete in the southwest portion of the site was mostly done, but not operating today.
The DERR left the site at ~12:45 pm.
SPLIT SAMPLES COLLECTED: No
IS THE WORK BEING PERFORMED IN A MANNER CONSISTENT WITH THE ACCEPTED WORKPLAN?
Yes

Looking to the west at the south end of cell 200. Leachate is being pumped into a water truck for
transport to the leachate evaporation (WAIV) unit. Lead scrape area soil stockpile is to the left in the
background.

Looking to the north at cell 200. Waste being loaded into a truck for transport to the Repository.

Looking to the west at the excavation work for the 25’ buffer at the northern boundary of the
Repository area.

Looking south at the sails in the WAIV unit. Salts/minerals have started to build up on the fabric sails. In
the recent heavy winds, the fabric was displaced inward away from the outer ends of the metal frames,
and now the fabric has wrinkles evident. Ninigret is planning to stretch the fabric tight again and anchor
it in place.