DERR-2025-007957

David Bird <[e-mail]>
Extell Mayflower Waste Rock Pile Water Monitoring Package
David Bird <[e-mail]>Mon, Nov 3, 2025 at 8:50 AM
To: Van King <[e-mail]>
Cc: "[e-mail]" <[e-mail]>, Allison Stanley <[e-mail]>, "Fawcett, Kent"
<[e-mail]>, "[e-mail]" <[e-mail]>
Van,
Thanks for the Mayflower Waste Rock Pile Water Monitoring results including water level and water quality monitoring
performed through September 30, 2025.
We've looked at the information presented in the report and have no comments. Thanks.
Dave
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Please find attached our monthly submittal of information that includes the recent results of water level and
water quality monitoring of the Mayflower Waste Rock Pile. The attached December 2023 Monitoring package
includes your suggested revisions to Table 1 provided to me while meeting with Allison on January 4, 2024. The
revisions included the removal bold text and a few analytical result highlights for the Property Line Sump which
were not removed when we received clarification that groundwater screening levels apply to this monitoring
location. All your suggested modifications have been made for this report and they will also be reflected in
subsequent monthly monitoring reports.

Regards,

Van F. King, PG
2498 E Nantucket Drive
Salt Lake City, Utah 84121
[phone]
[e-mail]

11/3/25, 8:51 AM State of Utah Mail - Extell Mayflower Waste Rock Pile Water Monitoring Package
https://mail.google.com/mail/u/0/?ik=9ad96c2360&view=pt&search=all&permmsgid=msg-a:r4536403933295116626&simpl=msg-a:r453640393329511…1/3