Federal regulations · Through 2026-08-25 · Newer source version available

40 CFR Appendix A to Subpart E of Part 1068: Appendix A to Subpart E of Part 1068—Plans for Selective Enforcement Auditing

The following tables describe sampling plans for selective enforcement audits, as described in § 1068.420:
Table A-1—Sampling Plan Code Letter
Projected family sales Code letter 1 Minimum number of tests Maximum number of tests
To pass To fail
20-50 AA 3 5 20
20-99 A 4 6 30
100-299 B 5 6 40
300-499 C 5 6 50
500 + D 5 6 60
1 A manufacturer may optionally use either the sampling plan for code letter “AA” or sampling plan for code letter “A” for Selective Enforcement Audits of families with annual sales between 20 and 50 engines/equipment. Additionally, the manufacturer may switch between these plans during the audit.
Table A-2—Sampling Plans for Different Engine Family Sales Volumes
Stage a AA A B C D
Pass # Fail # Pass # Fail # Pass # Fail # Pass # Fail # Pass #
1
2
3 0
4 0 0
5 1 5 0 0 0 0
6 1 6 1 6 1 6 0 6 0 6
7 2 6 1 7 1 7 1 7 1 7
8 2 7 2 7 2 7 2 7 2 8
9 3 7 2 8 2 8 2 8 2 8
10 3 8 3 8 3 8 3 9 3 9
11 4 8 3 8 3 9 3 9 3 9
12 4 9 4 9 4 9 4 10 4 10
13 5 9 5 10 4 10 4 10 4 10
14 5 10 5 10 5 10 5 11 5 11
15 6 10 6 11 5 11 5 11 5 11
16 6 10 6 11 6 12 6 12 6 12
17 7 10 7 12 6 12 6 12 6 12
18 8 10 7 12 7 13 7 13 7 13
19 8 10 8 13 8 13 7 13 7 13
20 9 10 8 13 8 14 8 14 8 14
21 9 14 9 14 8 14 8 14
22 10 14 9 15 9 15 9 15
23 10 15 10 15 10 15 9 15
24 11 15 10 16 10 16 10 16
25 11 16 11 16 11 16 11 16
26 12 16 11 17 11 17 11 17
27 12 17 12 17 12 17 12 17
28 13 17 12 18 12 18 12 18
29 14 17 13 18 13 18 13 19
30 16 17 13 19 13 19 13 19
31 14 19 14 19 14 20
32 14 20 14 20 14 20
33 15 20 15 20 15 21
34 16 21 15 21 15 21
35 16 21 16 21 16 22
36 17 22 16 22 16 22
37 17 22 17 22 17 23
38 18 22 18 23 17 23
39 18 22 18 23 18 24
40 21 22 19 24 18 24
41 19 24 19 25
42 20 25 19 26
43 20 25 20 26
44 21 26 21 27
45 21 27 21 27
46 22 27 22 28
47 22 27 22 28
48 23 27 23 29
49 23 27 23 29
50 26 27 24 30
51 24 30
52 25 31
53 25 31
54 26 32
55 26 32
56 27 33
57 27 33
58 28 33
59 28 33
60 32 33
a Stage refers to the cumulative number of engines/equipment tested.

Where this section sits in the code

Title 40—Protection of Environment
CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY
SUBCHAPTER U—AIR POLLUTION CONTROLS
PART 1068—GENERAL COMPLIANCE PROVISIONS FOR HIGHWAY, STATIONARY, AND NONROAD PROGRAMS
Subpart E—Selective Enforcement Auditing

The following tables describe sampling plans for selective enforcement audits, as described in § 1068.420:

Table A-1—Sampling Plan Code Letter

Projected family sales Code letter 1 Minimum number of tests Maximum number of tests

To pass To fail

20-50 AA 3 5 20

20-99 A 4 6 30

100-299 B 5 6 40

300-499 C 5 6 50

500 + D 5 6 60

1 A manufacturer may optionally use either the sampling plan for code letter “AA” or sampling plan for code letter “A” for Selective Enforcement Audits of families with annual sales between 20 and 50 engines/equipment. Additionally, the manufacturer may switch between these plans during the audit.

Table A-2—Sampling Plans for Different Engine Family Sales Volumes

Stage a AA A B C D

Pass # Fail # Pass # Fail # Pass # Fail # Pass # Fail # Pass #

3 0

4 0 0

5 1 5 0 0 0 0

6 1 6 1 6 1 6 0 6 0 6

7 2 6 1 7 1 7 1 7 1 7

8 2 7 2 7 2 7 2 7 2 8

9 3 7 2 8 2 8 2 8 2 8

10 3 8 3 8 3 8 3 9 3 9

11 4 8 3 8 3 9 3 9 3 9

12 4 9 4 9 4 9 4 10 4 10

13 5 9 5 10 4 10 4 10 4 10

14 5 10 5 10 5 10 5 11 5 11

15 6 10 6 11 5 11 5 11 5 11

16 6 10 6 11 6 12 6 12 6 12

17 7 10 7 12 6 12 6 12 6 12

18 8 10 7 12 7 13 7 13 7 13

19 8 10 8 13 8 13 7 13 7 13

20 9 10 8 13 8 14 8 14 8 14

21 9 14 9 14 8 14 8 14

22 10 14 9 15 9 15 9 15

23 10 15 10 15 10 15 9 15

24 11 15 10 16 10 16 10 16

25 11 16 11 16 11 16 11 16

26 12 16 11 17 11 17 11 17

27 12 17 12 17 12 17 12 17

28 13 17 12 18 12 18 12 18

29 14 17 13 18 13 18 13 19

30 16 17 13 19 13 19 13 19

31 14 19 14 19 14 20

32 14 20 14 20 14 20

33 15 20 15 20 15 21

34 16 21 15 21 15 21

35 16 21 16 21 16 22

36 17 22 16 22 16 22

37 17 22 17 22 17 23

38 18 22 18 23 17 23

39 18 22 18 23 18 24

40 21 22 19 24 18 24

41 19 24 19 25

42 20 25 19 26

43 20 25 20 26

44 21 26 21 27

45 21 27 21 27

46 22 27 22 28

47 22 27 22 28

48 23 27 23 29

49 23 27 23 29

50 26 27 24 30

51 24 30

52 25 31

53 25 31

54 26 32

55 26 32

56 27 33

57 27 33

58 28 33

59 28 33

60 32 33

a Stage refers to the cumulative number of engines/equipment tested.

Collected 2026-08-27T02:26:04Z. Source file · JSON

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