DAQ-2025-000860

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DIVISION OF AIR OUALITY
January 29,2025
Attn: NSPS Contact & Mr. Chad Gilgen,
Minor Source Compliance, Division of Air Quality
P.O. Box 144820
Salt Lake City, UT 84L74-4820
RE: NSPS UUU 2nd 2024 Semiannual Report for Dryer 1
40 CFR 560.735; UAC R307-210
Wildcat Sand, LLC - Uintah County Sand Processing Plant
Randlett, Utah
DAQE-AN1s9980004-24
REVIEWED
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DAQ NSPS Contact & Mr. Gilgen:
Wildcat Sand, LLC (Wildcat) owns and operates the sand processing facility for the Uintah
County Sand Processing Plant, Project Numbers N159980003 and N1"59980004. The Division of
Air Quality (DAa) issued the Approval Orders (AOs) DAQE-AN159980001-20 and DAQE-
AN159980004-24 for the Wildcat Uintah County Sand Processing Plant on July L, 2OZL, and
December 23,2024, respectively. The AOs allow for operation of two sand dryers, Dryer 1 and
Dryer 2, along with one sand crusher, Crusher 1. The sand dryers are affected facilities 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). During the reporting period, only
Dryer 1 commercially operated, and thus Wildcat is submitting this NSPS UUU Semiannual Report
for Dryer 1.
Pursuant to NSPS UUU, 560.735, Wildcat submits this semiannual summary of control
device operating parameters from July 1to December 31, 2024, in which no exceedances were
visually observed.
Reportable exceedances for the Dryer L control device operating parameters are described in
NSPS UUU, 950.735(cX1). The Wildcat Uintah County Sand Processing Plant Dryer 1 utilizes a dry
control device; therefore, 560.735(cX2) 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:
Page 2 of 2
Wildcat NSPS UUU 2nd 2024 Semiannual Report
January 29,2025
NSPS UUU, 560.735(c):
(c) Eoch owner or operator sholl submit written reports semiannually of exceedances of
control device operating parameters required to be monitored by I 60.7i4 of this subport.
For the purpose of these reports, exceedances are defined as follows:
(1) All 6-minute periods during which the overoge opacity from dry control devices is
greoter than 10%;
NSPS UUU 560.734(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,
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, 2024.
Should the DAQ have any questions regarding this semiannual report for Dryer 1, please contact
Eric Sturm, with Air Regulations Consulting, LLC (ARC), and environmental consultant for Wildcat,
at 402.877 .7 887 or e ri c @ a i rregcon s u lti n g.co m.
Sincerely,
4
Matthew J. Hyita, P.E.
Wildcat Plant Manager
Cc: Eric Sturm, ARC Principal, Sr. Consultant