1. LawStack
  2. Title 40 - Protection of Environment
  3. Chapter I - ENVIRONMENTAL PROTECTION AGENCY
  4. Subchapter C - AIR PROGRAMS
  5. Part 90 - CONTROL OF EMISSIONS FROM NONROAD SPARK-IGNITION ENGINES AT OR BELOW 19 KILOWATTS
  6. Subpart F - Selective Enforcement Auditing
  7. 40 CFR Appendix A to Subpart F of Part 90
40 CFR Appendix A to Subpart F of Part 90
Sampling Plans for Selective Enforcement Auditing of Small Nonroad Engines
June 9, 2020
CFR

Table 1—Sampling Plan Code Letter

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

Table 2—Sample Plan for Code Letter “A”

[Sample inspection criteria]

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

1Test sample passing not permitted at this stage.

2Test sample failure not permitted at this stage.

Table 3—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
10   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 4—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 5—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.

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