DAQ-2024-008629

1

DAQC-558-24
Site ID 14575 (B4)

MEMORANDUM

TO: STACK TEST FILE – UINTA WAX OPERATING, LLC – ULT 13-26-3-1E

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

FROM: Paul Bushman, Environmental Scientist

DATE: June 6, 2024

SUBJECT: Source: One (1) Vortec 5.7L 142 hp engine; SN: 57L0005919M17
Contact: Kaylene Bridwell: 405-496-7308
Location: Uintah County, UT
Test Contractor: Oasis Emission Consultants, Inc.
Permit/AO#: 14575
Action Code: TR
Subject: Review of stack test report dated May 30, 2024

On June 5, 2024, Utah Division of Air Quality (DAQ) received a test report for one (1) Vortec 5.7L 142
hp engine at ULT 13-26-3-1E, Uintah County, UT. Testing was performed May 13, 2024, to demonstrate
compliance with the emission limits found in Utah Administrative Code R307-510-4. The calculated test
results are:

Source Test Date Pollutant Method Tester Results DAQ Results Limits
Vortec 5.7L
SN:
57L0005919M17
May 13,
2024
NOx 7E 8.73 g/bhp-hr 8.737 g/bhp-hr 1.0 g/bhp-hr
CO 10 5.83 g/bhp-hr 5.826 g/bhp-hr 2.0 g/bhp-hr
VOC 25A 2.26 g/bhp-hr 2.317 g/bhp-hr 0.7 g/bhp-hr

DEVIATIONS: None.

CONCLUSION: The Vortec 5.7L 142 hp engine appears to be out of compliance.

RECOMMENDATION: The emissions from the Vortec 5.7L 142 hp engine should be
considered to have been out of compliance with the emission
limits of UAC R307-510-4 during testing. Recommend issuing a
Compliance Advisory for the failed stack test.

ATTACHMENTS: DAQ stack test review excel spreadsheets, Uinta Wax Operating,
LLC stack test report.
2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45