40 CFR Appendix A to Subpart F of Part 89
Sampling Plans for Selective Enforcement Auditing of Nonroad Engines
June 9, 2020
CFR

Table 1—Sampling Plan Code Letter

Open Table
Annual engine family sales Code letter
20-50 AA1
20-99 A
100-299 B
300-499 C
500 or greater D

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

Table 2—Sampling Plan for Code Letter “AA”

[Sample inspection criteria]

Open Table
Stage Pass No. Fail No.
1 (1) (2)
2 (1) (2)
3 0 (2)
4 0 (2)
5 1 5
6 1 6
7 2 6
8 2 7
9 3 7
10 3 8
11 4 8
12 4 9
13 5 9
14 5 10
15 6 10
16 6 10
17 7 10
18 8 10
19 8 10
20 9 10

1Test sample passing not permitted at this stage.

2Test sample failure not permitted at this stage.

Table 3—Sampling Plan for Code Letter “A”

[Sample inspection criteria]

Open Table
Stage Pass No. Fail No.
1 (1) (2)
2 (1) (2)
3 (1) (2)
4 0 (2)
5 0 (2)
6 1 6
7 1 7
8 2 7
9 2 8
10 3 8
11 3 8
12 4 9
13 5 10
14 5 10
15 6 11
16 6 11
17 7 12
18 7 12
19 8 13
20 8 13
21 9 14
22 10 14
23 10 15
24 11 15
25 11 16
26 12 16
27 12 17
28 13 17
29 14 17
30 16 17

1Test sample passing not permitted at this stage.

2Test sample failure not permitted at this stage.

Table 4—Sampling Plan for Code Letter “B”

[Sample Inspection Criteria]

Open Table
Stage Pass No. Fail No.
1 (1) (2)
2 (1) (2)
3 (1) (2)
4 (1) (2)
5 0 (2)
6 1 6
7 1 7
8 2 7
9 2 8
10 3 8
11 3 9
12 4 9
13 4 10
14 5 10
15 5 11
16 6 12
17 6 12
18 7 13
19 8 13
20 8 14
21 9 14
22 9 15
23 10 15
24 10 16
25 11 16
26 11 17
27 12 17
28 12 18
29 13 18
30 13 19
31 14 19
32 14 20
33 15 20
34 16 21
35 16 21
36 17 22
37 17 22
38 18 22
39 18 22
40 21 22

1Test sample passing not permitted at this stage.

2Test sample failure not permitted at this stage.

Table 5—Sampling Plan for Code Letter “C”

[Sample Inspection Criteria]

Open Table
Stage Pass No. Fail No.
1 (1) (2)
2 (1) (2)
3 (1) (2)
4 (1) (2)
5 0 (2)
6 0 6
7 1 7
8 2 7
9 2 8
10 3 9
11 3 9
12 4 10
13 4 10
14 5 11
15 5 11
16 6 12
17 6 12
18 7 13
19 7 13
20 8 14
21 8 14
22 9 15
23 10 15
24 10 16
25 11 16
26 11 17
27 12 17
28 12 18
29 13 18
30 13 19
31 14 19
32 14 20
33 15 20
34 15 21
35 16 21
36 16 22
37 17 22
38 18 23
39 18 23
40 19 24
41 19 24
42 20 25
43 20 25
44 21 26
45 21 27
46 22 27
47 22 27
48 23 27
49 23 27
50 26 27

1Test sample passing not permitted at this stage.

2Test sample failure not permitted at this stage.

Table 6—Sampling Plan for Code Letter “D”

[Sample Inspection Criteria]

Open Table
Stage Pass No. Fail No.
1 (1) (2)
2 (1) (2)
3 (1) (2)
4 (1) (2)
5 0 (2)
6 0 6
7 1 7
8 2 8
9 2 8
10 3 9
11 3 9
12 4 10
13 4 10
14 5 11
15 5 11
16 6 12
17 6 12
18 7 13
19 7 13
20 8 14
21 8 14
22 9 15
23 9 15
24 10 16
25 11 16
26 11 17
27 12 17
28 12 18
29 13 19
30 13 19
31 14 20
32 14 20
33 15 21
34 15 21
35 16 22
36 16 22
37 17 23
38 17 23
39 18 24
40 18 24
41 19 25
42 19 26
43 20 26
44 21 27
45 21 27
46 22 28
47 22 28
48 23 29
49 23 29
50 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

1Test sample passing not permitted at this stage.

2Test sample failure not permitted at this stage.

[59 FR 31335, June 17, 1994, as amended at 70 FR 40446, July 13, 2005]


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