DSHW-2025-001447

From: Blake Downey <[e-mail]>
Date: Mon, Mar 10, 2025 at 6:10 PM
Subject: RE: [EXTERNAL] Crown Plating Additional SI Work
To: Brad Lauchnor <[e-mail]>
Cc: Paige Walton <[e-mail]>
Brad,

I will make those changes. The wipe sampling is being taken care of as a part of a separate project that Chris is going to
do, not part of this one. Yes, the sump and oil/water separator are the same one you mention below. I will clarify.

Thank you!

Blake Downey, P.G.
Vice President and Senior Project Hydrogeologist
Wasatch Environmental
2410 West California Avenue
Salt Lake City, Utah 84104
Cell: 435-760-8269
Office: 801-972-8400
Email: [e-mail]

From: Brad Lauchnor <[e-mail]>
Sent: Monday, March 10, 2025 11:03 AM
To: Blake Downey <[e-mail]>
Cc: Paige Walton <[e-mail]>
Subject: [EXTERNAL] Crown Plang Addional SI Work

Hi Blake,

I've read through the recently submitted work plan for additional work at Crown Plating. I have a couple of things that need
clarification or changing as follows:

The confirmation sampling in the Sump walls and floor need to be at least 5 point composites.

In section 2.2 Wasatch identifies several "Data Gaps" for the site. Will you please discuss the data gaps that are not being
addressed in this plan and when they might be addressed in the future. Interior wipe sampling stands out as something that
will be needed before occupation by a tenant is safe.

I also want to clarify that references to the "Sump" in the plan are discussing the "Oil/water separator" and that these
references all refer to the same sump/oil-water separator directly east of the proposed SG-1 sample.

Please update the plan and resubmit it to [e-mail].

Thanks,
Brad
Brad Lauchnor P.E., P.G.
Environmental Engineer | Hazardous Waste Cleanup Program
Division of Waste Management and Radiation Control
Phone: [phone] | Front
Desk: (801)-536-0200
Work Hours M-Th 8:00 am -
6:00 pm
wasteandradiation.utah.gov
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