DERR-2024-004742

3/6/24, 1:23 PM State of Utah Mail - Request to reduce the Chemicals of Concern List - Bi Annual Groundwater Sampling, Chromalox Inc., Ogden F…
https://mail.google.com/mail/u/0/?ik=75050723fc&view=pt&search=all&permthid=thread-f:1792721326581948947&simpl=msg-f:17927213265819489…1/2
Chris Howell <[e-mail]>
Request to reduce the Chemicals of Concern List - Bi Annual Groundwater
Sampling, Chromalox Inc., Ogden Facility
2 messages
Ellington, Byron <[e-mail]>Tue, Mar 5, 2024 at 1:57 PM
To: "[e-mail]" <[e-mail]>
Cc: "Stephanie Lara (ETS CHX US)" <[e-mail]>
Hi Chris,

As discussed during our meeting last week, this email is to request that we remove SVOCs/PAHs from the bi-annual
analyte groundwater monitoring list of COCs. Remaining COCs will consist of VOCs (including 1,4 dioxane), 8 RCRA
metals, iron, and manganese.

Attached is a running spreadsheet since 2019 and, as you can see, there have very few detections and no
exceedances of SVOC/PAHs.

Our next groundwater monitoring sampling effort is scheduled for March 2024. Please let us know if this request can
be accommodated.

Byron Ellington, CPG, PG (TX, UT)
Director
RPS/Tetra Tech | North America
4801 Southwest Parkway, Parkway One, Suite 185
Austin TX 78735, USA
D 512.579.3315 M 512.771.0863
E [e-mail]
On 24 January 2023, RPS became a Tetra Tech company. This represents an exciting new chapter for our business. Tetra Tech is a leading provider
of consulting and engineering services, and our combined offering and technical capability is broad and deep.
The level of service and commitment you have come to expect from RPS will continue seamlessly and assuredly. While we will be changing our
name to ‘RPS, A Tetra Tech Company’, there will be no change to our team or your points of contact within the company.
If you have any questions about this news, please don’t hesitate to contact me.
Follow us on: rpsgroup.com | LinkedIn | Facebook | Instagram | YouTube

3/6/24, 1:23 PM State of Utah Mail - Request to reduce the Chemicals of Concern List - Bi Annual Groundwater Sampling, Chromalox Inc., Ogden F…
https://mail.google.com/mail/u/0/?ik=75050723fc&view=pt&search=all&permthid=thread-f:1792721326581948947&simpl=msg-f:17927213265819489…2/2
Table 2 - Groundwater Analytical Table_with trend graphs.xlsx
1664K
Chris Howell <[e-mail]>Wed, Mar 6, 2024 at 1:23 PM
To: "Ellington, Byron" <[e-mail]>
Cc: "Stephanie Lara (ETS CHX US)" <[e-mail]>
Byron,
We took a look at your request to remove SVOCs/PAHs from the bi-annual analyte groundwater monitoring list. We
agree that SVOCs and PAHs do not appear to be a COC for the VCP site. Please go ahead and remove these
analytes from the sampling list moving forward.
When the date for the Spring 2024 sampling is planned please let me know.
Regards,
Chris
[Quoted text hidden]
--
Christopher Howell P.G.
Env. Scientist | VCP/Brownfields Section
Cell: [phone]
environmentalresponse.utah.gov
Emails to and from this email address may be considered public records and thus subject to Utah GRAMA
requirements.