DAQ-2024-004632

January 3,2024
CERTIFIED MAIL #
RETURN RECEIPT REQUESTED
ATTN: NESHAP MACT Reports
Utah Division of Air Quality
P.O. Box 144820
Salt Lake ciry, uT 84114-4820
ATTN: NESHAP MACT Reports
U.S. Environmental Protection Agency
Region 8
1595 Wynkoop St
Denver, CO 80202-1129
RE: 40 CFR 63 Subpart WWWW MACT Semi-Annual Compliance Reports
for the period of July 1,2023 to December 3 1, 2023.
To Whom It May Concern:
Enclosed are the semi-annual compliance reports for Midwestern Fabricators as required
under 40 CFR 63 Subpart WWWW (also known as the Reinforced Plastic Composite
Manufacturing MACT rule). This report is for the period July 1, 2023 to December 31,
2023.
The compliance report consists of three items, which are attached hereto:
o Certified Statement of Compliance with the applicable workpractices in Table 4
o Rolling 6-month HAP Emission Averaging compliance option summary sheet for
the period July I ,2023 to December 31, 2023.
o Monthly HAP Emission compliance sheets for July 1,2023 to December 31, :
2023.
Please contact me if you have any questions or require any fuither information.
Sincerely,
I,TAH DEPAHTMENT OF
EWRONMENTAL OUATJTY
Vice President, Midwestern Fabricators JAN 5 |i;'il
AIR QUALITYDIVISION OF
B-2-11199
Notice of Compliance MACT Work practice Compliance Status
I have personally examined and am familiar with the information in this document and all
attachments thereto. and I certifu that based on reasonable investigation, including my
inquiry of those individuals responsible for obtaining the information, the submitted
information is true. accurate and complete to the best of my'knowledge and belief.
The following certified statements demonstrate compliance with those Composite MACT
work practice standards listed in Table 4 to subpart WWWW of Part 63 that apply to the
reinforced plastic @olymer casting) composite manufacturing operations at the
Midwestern Fabricators facility in Salt Lake Cit1," Utah for the period of January 1,2023
to December 31, 2023:
1. All cleaning materials contain no HAP, except styrene contained in closed
systems or cleaning materials used to clean cured resin from application
equipment.
All HAP-containing storage containers are kept closed or are covered except
when adding or removing materials. Any bulk storage tanks are vented only as
necessary for safety.
HAP-containing containers of 5 gallons capacity or less may be open when active
mixing is taking place, or during periods when these containers are being used to
apply resin.
Mixer covers are closed during mixing except when adding materials to the
mixers or changing covers to the mixing vessels, and those gaps around the mixer
shafts and required instrumentation are less than 1 inch.
Mixers are not actively vented to the atmosphere when the agitator is turning,
except when adding materials is necessary for safety.
Al1 mixers are closed except when adding materials to the mixing vessels. All
mixing containers with 5 gallons or less capacity may be open during active
mixing. Mixing containers with a surface area of 500 square inches or less used
for polymer casting mixing operations may also be open while active mixing is
taking place.
2.
J.
4.
5.
6.
Date: January 3,2024
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