DERR-2024-006345

6952 South High Tech Drive
Midvale, Utah 84057
P [phone]
Terracon.com
January 29, 2024
Utah Department of Environmental Quality
Division of Environmental Response and Remediation
P.O. Box 144840
195 North 1950 West
Salt Lake City, Utah 84114-4840
Attn:Mr. Hong-Lei Tao
P:385-391-8138
E:[e-mail]
RE: Monitoring Well Abandonment Report
Work Assignment JFK-20-TER
Former Freeway Chevron - 990 Buena Vista Boulevard, Washington, Utah
Facility ID 6000209, Release Site JFK
Terracon Project No. AL067006
Dear Mr. Tao:
Terracon Consultants, Inc. (Terracon) has prepared this letter to document the abandonment
of the groundwater monitoring wells associated with Release Site JFK at the former Freeway
Chevron site in Washington, Utah.
Terracon prepared Work Plan JFK-19 to outline the scope of work assumed to be required to
abandon the existing monitoring wells. Work Plan JFK-19 included abandonment of 6 on-site
monitoring wells and 5 off-site monitoring wells associated with Release Site JFK.
Terracon mobilized to the site on January 17, 2024. Upon review of the newly developed site,
it was determined that all on-site monitoring wells had been destroyed during redevelopment
and re-grading of the site for the installation of the new convenience store and fueling facility.
Additionally, only 4 of the 5 off-site wells were still located off-site as MW-9 was destroyed
during re-grading of the area. A total of 4 off-site monitoring wells remained in the area (MW-
10, MW-13, MW-15 and MW-16R) and were abandoned following the protocol outlined in the
Work Plan.
All groundwater monitoring wells that were associated with the release were either destroyed
or properly abandoned. A photographic log of the site conditions and off-site monitoring well
abandonment procedures is attached.
Work Plan JFK-20 - Well Abandonment
Former Freeway Chevron Release Site JFK | Washington, Utah
January 29, 2024 | Terracon Project No. AL067006
Facilities |Environmental | Geotechnical | Materials 2
If you should have any questions or comments regarding this project, please contact Amy
Austin at [phone].
Sincerely,
Terracon Consultants, Inc.
Amy Austin Andy King, P.G.
Certified UST Consultant #CC238 Certified UST Consultant #CC030
Attached: Photographic Log
' P \ ' X V W L Q
Work Plan JFK-20 - Well Abandonment
Former Freeway Chevron Release Site JFK | Washington, Utah
Site Photos January 17 and 18, 2024 | Terracon Project No. AL067006
1
Photo #1 View West. Former Freeway Cheveron
Station demolished and replaced with new
Maverik Station. Entire site was regraded.
Photo #2 View North. Entire site was regraded
and resurfaced. All onsite monitoring wells were
destroyed. Asphalt covering former MW locations.
Photo #3 View South. Entire site was regraded
and resurfaced. All onsite monitoring wells were
destroyed. Asphalt covering former MW locations.
Photo #4 View West. Entire site was regraded and
resurfaced. All onsite monitoring wells were
destroyed. Asphalt covering former MW locations.
Photo #5 View East. Entire site was regraded and
resurfaced.
Photo #6 View South. Roadside median area was
regraded and resurfaced with gravelly cobble.
Work Plan JFK-20 - Well Abandonment
Former Freeway Chevron Release Site JFK | Washington, Utah
Site Photos January 17 and 18, 2024 | Terracon Project No. AL067006
2
Photo #7 View South. Offsite regraded roadside
median area where MW-9 was located. MW-9
destroyed during regrading.
Photo #8 View North-east. MW-9 flushmount
completion laying on surface. MW-9 destroyed
during regrading of the area.
Photo #9 View South. Preparing to abandon offsite
monitoring well MW-13.
Photo #10 Monitoring abandonment methodology
(MW-13). Fill with bentonite and hydrate.
Photo #11 Cap placed on top of filled casing.Photo #12 Additional bentonite placed in surface
completion and hydrated.