DAQ-2024-011160

DEPARTMENT OF THE AIR FORCE
75TH CIVIL ENGINEER GROUP (AFMC)
HILL AIR FORCE BASE UTAH
3l August 2023
Amanda Burton
Chief, Environmental Branch
75th CEG/CEIE
7290 Weiner Road
Hill Air Force Base Utatr 84056-5003
Director
Utah Division of Air Quality
Attention: Compliance Section
P.O. Box 144820
Salt Lake ciry utah 84114-4820
Dear Director
TJTAH DEPAETMENT OF
eNvtnoHtuenru- ouALrTY
sEP - 1 2023
fian| D"tl Vece'J
rirvisron oF AIR QUALrY
On 30 August 2023, Hill Air Force Base (AFB) completed startup oftwo, identical rental
boilers. The new boilers are permitted under approval letter DAQE-GNI01210289-23 and are
considered affected sources under 40 CFR 60, Subpart Dc and 40 CFR 63, Subpart DDDDD.
This initial notification contains the information required by 40 CFR 60.48c(a) for the
following affected sources:
Building Unit ID Identification of Fuels to be
Combusted
Design Heat Input
Capacity
(MMBtu/hour)
r286
Cleaver Brooks
CBLE-200-600-l50sT
AQUS 4s4M
Boiler'Natural Gas,
Curtailment Fuel Oil Back-up 24.49
1286
Cleaver Brooks
CBLE-200-600-l50sT
AQUIS 4544s
Boiler - Natural Gas,
Ctrtailment Fuel Oil Back-up 24.49
The listed boilers are subject to 40 CFR 63.7495(d), and 40 CFR 63.7545(c), which states that
for each affected emission unit with a startup on or after January 31,2013, the permiuee shall
submit an initial notification, as specified in 40 CfR 63.9O)(a) and (5), not later than 15 days
after the actual date of startup. Notification of intent to construct the rental boilers was
submitted on 6 June 2023 andthe actual startup of the listed boilers occurred on 30 August 2023.
REVIEWEDInitials: Date: Oct 24, 2024Compliance Status: OKFile #: 10121 (B2)
This letter also serves as the required initial notffication under Hill AFB's Title V Operating
Permit condition II.B.53.g.
The affected facility is required under 40 CFR 60.48c(a) and 40 CFR 60.7 to provide a
notification of the date of actual startup as well as the information required by 40 CFR 60.48c(a).
Startup of the listed boilers occurred on 30 August 2023. The infonnation required under 40
CFR 60.48c(a) is provided below.
(l) The design heat input capacrty of each boiler is24.49 MMBtulhour, and each unit will be
natural gas with curtailment fuel oil back-up.
(2) The boilers are not subject to any federally enforceable requirement that limits the annual
capacrty factor for any fuel or mixture of fuels under 40 CFR 60.42c, or 40 CFR 60.43c.
(3) The annual capacity factor at which the boilers anticipate to operate on natural gas is 0.75
because the units are not anticipated to be operated in June, July, and August. The annual
capacity factor at which the boilers anticipate to operate on fuel oil is 0.0007 because dual-fuel
boilers are required to be fired at least bimonthly with standby fuel to confirm reliability in
accordance with Air Force Manual 32-1068 Heating Systems and Unfired Pressure Vessels. It is
not known when alternative liquid fuel use is anticipated to be operated because the Questar Gas
intemrptible natural gas contract is dependent upon the firm load demand on the distribution
system. The anrnral capacrty factor is the ratio between the actual heat input to the boiler from
the fuels burned during a calendar year and the potential heat input to the boiler or process heater
had it been operated for 8,760 hours during ayedr at the mildmum steady state design heat input
capacrty.
(a) The boilers will not operate usmg an emerging technology for controlling SOz emissions.
If you have any questions or would like to discuss this issue further, my point of contact is Dr.
Erik Dettenmaier, at (80 I ) 7 7 7 -0888 or erik.dettenmaier. I @us.af.mil.
Sincerely
X nrrnaa Burton
881n023
Siqned by BURTON.AMANDA.CHRISIINE.'1270023068
AMANDA BURTON, NH-III, DAF
Chief, Environmental Branch
cc:
Environmental Protection Agency, Region VIII
Office of Parfrrerships & Regulatory Assistance Air & Radiation Progrant
(Mail code 8P-AR)
1595 Wynkoop Street
Denver, CO 80202-1129