DAQ-2024-007302

January 29, 2024
Attn: NSPS Contact & Mr. Chad Gilgen,
Minor Source Compliance, Division of Air Quality
P.O. Box 144820
Salt Lake City, UT 84114-4820
RE: NSPS UUU 2nd 2023 Semiannual Report
40 CFR §60.735; UAC R307-210
Wildcat Sand, LLC - Uintah County Sand Processing Plant
Randlett, Utah
DAQE-AN159980001-20
DAQ NSPS Contact & Mr. Gilgen:
Wildcat Sand, LLC (Wildcat) owns and operates one (1) sand dryer and sand processing facility
for the Uintah County Sand Processing Plant, Project Number N159980003. The Division of Air
Quality (DAQ) issued the Approval Order (AO) DAQE-AN159980001-20 for the Wildcat Uintah
County Sand Processing Plant on July 1, 2021. The sand dryer is an affected facility under Code
of Federal Regulations Title 40 (40 CFR) Part 60 Subpart UUU – Standards of Performance for
Calciners and Dryers in Mineral industries (NSPS UUU). The sand dryer is a rotary design
controlled by a dedicated cyclone and fabric filter baghouse. Pursuant to NSPS UUU, §60.735,
Wildcat submits this semiannual summary of control device operating parameters from July 1 to
December 31, 2023, in which no exceedances were visually observed.
Reportable exceedances for sand dryer control device operating parameters are described in
NSPS UUU, §60.735(c)(1). The Wildcat Uintah County Sand Processing Plant sand dryer utilizes a
dry control device; therefore, §60.735(c)(2) and (3) do not apply. During this period, the
baghouse for the dryer was operated at levels which are consistent with the initial performance
test. For semiannual reporting purposes, NSPS UUU requires the following:
NSPS UUU, §60.735(c):
(c) Each owner or operator shall submit written reports semiannually of exceedances of
control device operating parameters required to be monitored by § 60.734 of this subpart.
For the purpose of these reports, exceedances are defined as follows:
(1) All 6-minute periods during which the average opacity from dry control devices is
greater than 10%;
NSPS UUU §60.734(c) specifically exempts industrial rotary sand dryers from requirements to
monitor opacity of emissions, due to the US EPA determination while developing NSPS UUU that
the potential particulate matter emission rate for such dryers is less than 0.01 gr/dscf. However,
DocuSign Envelope ID: 7BC6F85C-3433-481F-8708-BF2F69753347
REVIEWED
Initials: CG Date: 4-10-24
Compliance Status: NSPS UUU Semi-
Annual Report
File # 15998 (B2)
Page 2 of 2
Wildcat NSPS UUU 2nd 2023 Semiannual Report
January 29, 2024

Wildcat has developed voluntary internal procedures to check baghouse operating parameters
and conduct a brief visual and auditory inspection to confirm baghouses are operating properly
once per shift. The baghouse observations are qualitative checks along with required differential
pressure drop readings per day. Based upon this information, differential pressure readings, and
visual observations, there were no exceedances to report from July 1 to December 31, 2023.

Notably, AO DAQE-AN159980001-20 also allows for operation of a crusher pursuant to NSPS
OOO. Wildcat did not operate the crusher during this reporting period, and therefore no other
NESHAP or NSPS semiannual reporting is applicable.

Should the DAQ have any questions regarding this semiannual report, please contact Eric Sturm,
with Air Regulations Consulting, LLC (ARC), and environmental consultant for Wildcat, at
402.817.7887 or [e-mail].

Sincerely,

Matthew J. Hyita, P.E.
Wildcat Plant Manager

Cc: Eric Sturm, ARC Principal, Sr. Consultant

DocuSign Envelope ID: 7BC6F85C-3433-481F-8708-BF2F69753347
4/10/24, 3:48 PM State of Utah Mail - Wildcat Sand NSPS UUU Semiannual Report
https://mail.google.com/mail/u/0/?ik=36f4379b4d&view=pt&search=all&permmsgid=msg-f:1789482924426792874&simpl=msg-f:1789482924426792874 1/1
Chad Gilgen <[e-mail]>
Wildcat Sand NSPS UUU Semiannual Report
Eric Sturm <[e-mail]>Mon, Jan 29, 2024 at 8:05 PM
To: Chad Gilgen <[e-mail]>
Cc: Matt Hyita <[e-mail]>
Good evening, Chad,

For Wildcat Sand, LLC - Uintah County Sand Processing Plant, DAQE-AN159980001-20, please find the attached NSPS
UUU 2nd 2023 Semiannual Report for the one(1) sand dryer operating on-site. If there are any questions, please let me
know.

Sincerely.
[Quoted text hidden]
Wildcat UT NSPS UUU Report 2nd 2023 Semiannual_signed.pdf
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