DAQ-2024-011077

DAQE-GN116230004-24

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Ulysses Davis
National Oceanic and Atmospheric Administration
National Weather Service Salt Lake City Office
2242 West North Temple Street
Salt Lake City, UT 84116
[e-mail]

Dear Ulysses Davis:

RE: Revocation of Approval Order DAQE-571-96 dated May 30, 1996
Project Number: N116230004

The Division of Air Quality (DAQ) received your request to revoke Approval Order DAQE-571-96 on
September 11, 2024. The National Oceanic and Atmospheric Administration - National Weather Service
has requested the above-referenced Approval Order (AO) be revoked and replaced with a Small Source
Exemption (SSE). The DAQ has revoked the above-referenced AO effective as of the date of this letter.

As authorized by the Utah Legislature, the fee for revoking an AO is the actual time spent by the review
engineer and all other staff on the project. Payment should be made to the DAQ upon receipt of the
invoice.

If you have any questions, please contact Christine Bodell, who can be reached at [phone].

Sincerely,

{{$s }}

Bryce C. Bird
Director

BCB:CB:jg

cc: EPA Region 8
{{#d1=date1_es_:signer1:date:format(date, "mmmm d, yyyy")}} {{#s=Sig_es_:signer1:signature}}

195 North 1950 West • Salt Lake City, UT
Mailing Address: P.O. Box 144820 • Salt Lake City, UT 84114-4820
Telephone [phone] • Fax [phone] • T.D.D. [phone]
www.deq.utah.gov
Printed on 100% recycled paper
State of Utah

SPENCER J. COX
Governor
DEIDRE HENDERSON
Lieutenant Governor

Department of
Environmental Quality

Kimberly D. Shelley
Executive Director

DIVISION OF AIR QUALITY
Bryce C. Bird
Director

September 13, 2024
Equipment Details
Rating 376 hp = (280.6 kw)
Operational Hours 100 hours/yearSulfur Content 15 ppm or 0.0015%
Criteria Pollutant
Emission
Standards
(g/hp-hr)
Emission Factor
(lb/hp-hr)
Emission
Rate
(lbs/hr)
Emission
Total
(tons/year)Reference
NOX 0.031 11.66 0.58
CO 6.68E-03 2.51 0.13
PM10 2.20E-03 0.83 0.04
PM2.5 2.20E-03 0.83 0.04
VOC 2.51E-03 0.95 0.05
SO2 1.21E-05 0.00 0.00 AP-42 Table 3.4-1
HAP 0.01 0.00 See Below
Green House Gas Pollutant
Global
Warming
Potential
Emission Factor
(lb/hp-hr)
Emission
Rate
(lbs/hr)
Emission
Total
(tons/year)Reference
CO2 (mass basis)1 1.15 432 22
Methane (mass basis)25 0 0CO2e22
Hazardous Air Pollutant
Emission
Rate
(lbs/hr)
Emission
Total
(tons/year)Reference
Benzene 9.33E-04 2.46E-03 1.23E-04
Toluene 4.09E-04 1.08E-03 5.38E-05
Xylenes 2.85E-04 7.50E-04 3.75E-051,3-Butadiene 3.91E-05 1.03E-04 5.15E-06
Formaldehyde 1.18E-03 3.11E-03 1.55E-04
Acetaldehyde 7.67E-04 2.02E-03 1.01E-04
Acrolein 9.25E-05 2.43E-04 1.22E-05
Naphthalene 8.48E-05 2.23E-04 1.12E-05
Acenaphthylene 5.06E-06 1.33E-05 6.66E-07
Acenaphthene 1.42E-06 3.74E-06 1.87E-07
Fluorene 2.92E-05 7.69E-05 3.84E-06
Phenanthrene 2.94E-05 7.74E-05 3.87E-06
Anthracene 1.87E-06 4.92E-06 2.46E-07
Fluoranthene 7.61E-06 2.00E-05 1.00E-06
Pyrene 4.78E-06 1.26E-05 6.29E-07
Benz(a)anthracene 1.68E-06 4.42E-06 2.21E-07
Chrysene 3.53E-07 9.29E-07 4.65E-08
Benzo(b)fluoranthene 9.91E-08 2.61E-07 1.30E-08
Benzo(k)fluoranthene 1.55E-07 4.08E-07 2.04E-08
Benzo(a)pyrene 1.88E-07 4.95E-07 2.47E-08
Indeno(1,2,3-cd)pyrene 3.75E-07 9.87E-07 4.94E-08
Dibenz(a,h)anthracene 5.83E-07 1.53E-06 7.67E-08
Benzo(g,h,l)perylene 4.89E-07 1.29E-06 6.44E-08
AP-42 Table 3.3-2,
Table 3.4-3, &
Table 3.4-4
(1,3-Butadiene will
not popluate if the
engine size is greater
than 600 hp. AP-42 does not list 1,3-
Butadiene for engines
greater than 600 hp.)
Diesel-Fired Engines
AP-42 Table 3.3-1
& Table 3.4-1
Manufacturer Data,
AP-42 Table 3.3-1,
& Table 3.4-1
Emission Factor
(lb/MMBtu)
Emergency Engines should equal 100 hours of operation per year
Page 1 of 1 Version 1.1February 21, 2019
Response Summary:
The form below will collect the information to start the revocation process. Please fill out the information and a NSR
Engineer will be contacting you with any follow up requirements.

Q2. Company/Owner Information:
Owner Name:National Weather Service
Address 2242 West North Temple St.
City Salt Lake City
State UT
Zip 84116

Q4. Contact Information:
Contact Name:Ulysses Davis
Contact email:[e-mail]
Contact phone [phone]

Q3. Permit Information:
Site Name:National Weather Service
Site ID:11623
Permit ID: Ex DAQE-
111110001-21 DAQE-571-96

Q9. Is the AO revocation subject to the Oil and Gas PBR Registration? PBR Requirements
No

Q5. Please provide an explanation for the request to revoke your permit
Our 280KW emergency generator that is run an expected 26 hours per year should meet the small source exemption.

Q6. The undersigned acknowledges they are the responsible party to provide DAQ with this information and
authorize DAQ to bill the fee for revoking an AO. As authorized by Utah Legislature, the fee is the time spent
by the Permitting staff.
[Click here]

Embedded Data:
N/A