DAQ-2024-011771

State of Utah
SPENCER J. COX
Goventor
DEIDRE HENDERSON
Lieutenant Goventor
Department of
Environmental Quality
Kimberly D. Shelley
Executive Director
DTVISION OF AIR QUALIry
Bryce C. Bird
Direclor
November 12,2024
Sent Via Certified Mail No. 7019070000 0208345354
DAQC-It26-24
Site ID 10240 (Bl)
Miles Stephens
Gentry Mountain Mining, LLC
5550 West Bear Canyon Road
P.O. Box 300
Huntington, Utah 84528
Dear Mr. Stephens:
Re: Compliance Advisory - Gentry Mountain Mining, LLC,40 CFR Part 60 Subpart Y Standards of
Performance for Coal Preparation and Processing Plants, Emery County
On July 10,2024, the Utah Division of Air Quality (DAQ) conducted an inspection of Gentry
Mountain Mining, LLC, located on Highway 3l west of Huntington, Utah. Based on records provided
following the inspection, the DAQ observed that an annual emissions performance test has not been
performed and reported, which may be a violation of 40 CFR Part 60 Subpart Y.
Gentry Mountain Mining, LLC is required to comply with the above regulations. A written response to
this letter is required within ten (10) business days of receipt of this letter.
Additional details about the above observations and regulations are attached to this letter. Please
contact Daniel Riddle at [e-mail] or (385)-222-1357 if you have any questions about this
letter.
Sincerely,
L4,er-E;
Chad Gilgen, Manager
Minor Source Compliance Section
CG:DR:rh
Central Utah Public Health Department
195 North 1950 West. Salt Lake City, UT
Mailing Address: P.O. Box 144820 . Salt Lake Ciry, UT 841144820
Telephone (801 ) 5364000 . Fax [phone]. T.D.D. [phone]
ww.deq.utah.gov
Printed on 100% recycled paper
cc:
Potential Violation(s)
On July 10,2024, an inspector from the DAQ observed Gentry Mountain Mining, LLC in Emery
County, Utah.
Based on records provided following the inspection, the DAQ documented the following potential
violation: annual emissions performance testing required by 40 CFR Part 60 Subpart Y has not
been performed and reported to the DAQ.
DAQC-I126-24
Page 2
AO Conditions/Rules
Section 60.255(bX2) of 40 CFR Part 60 Subpart Y states;
(2) For each affected facility subject to an opacity standard, an initial performance test must be
performed. Thereafter, a new performance test must be conducted according to the requirements
in paragraphs (b)(2)(i) through (iii) ofthis section, as applicable, except as provided for
in paragraphs (e) and (f) of this section. Performance test and other compliance requirements for
coal truck dump operations are specified in paragraph (h) of this section.
(i) If any 6-minute average opacity reading in the most recent performance test exceeds half the
applicable opacity limit, a new performance test must be conducted within 90 operating days of the
date that the previous performance test was required to be completed.
(ii) If all 6-minute average opacity readings in the most recent performance test are equal to or less
than half the applicable opacity limit, a new performance test must be conducted within 12
calendar months of the date that the previous performance test was required to be completed.
(iii) An owner or operator of an affected facility continuously monitoring scrubber parameters as
specified in $ 60.256(bX2) is exempt from the requirements in paragraphs (bX2Xi) and (ii) if
opacity performance tests are conducted concurrently with (or within a 60-minute period o0 PM
performance tests.
The purpose of a Compliance Advisory (CA) is to document observations made by the DAQ. You are
responsible for complying with the Utah Air Conservation Rules. There are possible administrative
and civil penalties for failing to do so. Section l9-2-l15 of the Utah Code Annotated provides that
violators of the Utah Air Conservation Act and/or any order issued there under may be subject to a
civil penalty of up to $10,000 per day for each violation.
The written response to this CA will be considered in resolving the deficiencies documented in this
letter. It may include information demonstrating compliance with the regulations or a schedule to
bring your company back into compliance with the applicable regulations. The DAQ will review your
resporlse and this CA may be revised as a result of that review. Failure to respond in writing within ten
(10) business days of receipt of this CA will be considered in any subsequent enforcement action and
the assessment of penalties.
DAQC-I126-24
Page 3
Possible DAQ actions to resolve a CA include: No Further Action Letter, Warning Letter, Early
Administrative Settlement with reduced civil penalty, Settlement Agreement with civil penalty, or
Notice of Violation and Order to Comply.
This CA does not limit or preclude the DAQ from pursuing enforcement options conceming this
inspection. Also, this CA does not constitute a bar to enforcement action for conditions that the DAQ
did not observe or evaluate, or any other conditions found during future inspections.
A meeting may be requested to discuss this CA. Please contact Daniel Riddle at [e-mail] or
(385)-222-1357 if you would like to request a meeting or if you have any questions about this letter.
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MILES STEPT{ENS
GENTRY MOUNTAIN MINING, LLC
5550 W BEAR CANYON RD
P.O. BOX 300 sHUNTINGTON. UT 84528 "*
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