DAQ-2024-007735

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DAQC-398-24
Site ID 14178 (B4)
MEMORANDUM

TO: STACK TEST FILE – OWENS CORNING INSULATING SYSTEMS, LLC –
Fiberglass Manufacturing Facility

THROUGH: Rik Ombach, Minor Source Oil and Gas Compliance Section Manager

FROM: Paul Bushman, Environmental Scientist

DATE: April 29, 2024

SUBJECT: Sources: Curing Oven Charge Inlet, Curing Oven Discharge Inlet, Curing
Oven Outlet (STK-11)
Contact: Dave Jacobs: 740-953-1023
Location: 2762 South Main, Juab County, Utah
Test Contractor: Western Environmental Services and Testing, Inc.
Permit/AO#: Experimental Approval Order (EAO) DAQE-141780007-22
dated October 6, 2022
Action Code: TR
Subject: Review of stack test report dated February 27, 2024

On April 25, 2024, Utah Division of Air Quality (DAQ) received a test report for Curing Oven Outlet,
Curing Oven Charge Inlet, and the Curing Oven Discharge Inlet at Owens Corning Fiberglass
Manufacturing Facility, Juab County, Utah. Testing was performed February 27, 2024, to determine VOC
emission rates and system destruction efficiency of an untested bio-oxidation scrubber. The calculated test
results are:

Source Test Date Pollutant Method Tester Results DAQ Results Limits
Inlet
Charge
Oven
February
27, 2024 VOC 25A
14.27 ppmvd 13.043 ppmvd *
0.279 lb/hr 0.25 lb/hr *
Inlet
Discharge
Oven
February
27, 2024 VOC 25A
59.90 ppmvd 54.140 ppmvd *
1.60 lb/hr 1.45 lb/hr *
Oven
Outlet
February
27, 2024 VOC 25A
9.64 ppmvd 8.787 ppmvd *
0.336 lb/hr 0.31 lb/hr *

Total Destruction Efficiency = 100% - 8.787 ppmvd /(13.043 ppmvd +54.140 ppmvd) x 100% = 86.9%
100% - 0.31 lb/hr /(0.25 lb/hr +1.45lb/hr) x 100% = 82.0%

*There are no emission limits in the EAO. The destruction efficiency of a new bio-oxidation scrubber was
being determined with this test. See condition II.B.1.b of Experimental Approval Order
DAQE-AN141780007-22 dated October 6, 2022.
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DEVIATIONS: None.

CONCLUSION: The stack test report appears to be acceptable.

RECOMMENDATION: The destruction efficiency from the bio-oxidation scrubber should be
considered to have been 86.9% ppmvd and 82.0% lb/hr during testing.

ATTACHMENTS: DAQ stack test review excel spreadsheets, Owens Corning stack test
report.

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