Code of Federal Regulations > Title 40 > Chapter I > Part 86 > Appendix Appendix XII - Appendix XII to Part 86—Tables for Production Compliance Auditing of Heavy-Duty Engines and Heavy-Duty Vehicles, Including Light-Duty Trucks

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Title 40 - Protection of Environment last revised: Nov 24, 2025

Appendix Appendix XII - Appendix XII to Part 86—Tables for Production Compliance Auditing of Heavy-Duty Engines and Heavy-Duty Vehicles, Including Light-Duty Trucks

Table 1—Compliance Level Determination Using the Primary PCA Sampling Plan

	Compliance level ²
PCA test sample size. ¹
24	15
25	15
26	16
27	17
28	17
29	18
30	18
31	19
32	20
33	20
34	21
35	21
36	22
37	23
38	23
39	24
40	24
41	25
42	26
43	26
44	27
45	27
46	28
47	29
48	29
49	30
50	30
51	31
52	32
53	32
54	33
55	33
56	34
57	35
58	35
59	36
60	36

¹ Including the number of SEA tests if applicable.

² Is the test result of the sequence number: (The lowest test result is sequence No. 1).

Table 2—Values of K for the Reduced Fixed PCA Sampling Plan

	Value of K
Sample size:
3	1.602
4	1.114
5	0.895
6	0.764
7	0.674
8	0.608
9	0.555
10	0.513
11	0.478
12	0.448
13	0.422
14	0.399
15	0.379
16	0.360
17	0.343
18	0.328
19	0.314
20	0.301
21	0.289
22	0.277
23	0.266

Table 3—Values of K for the Reduced Sequential PCA Sampling Plan

	Value of K
Sample size:
4	1.671
8	0.912
12	0.672
16	0.540
20	0.451

[50 FR 35401, Aug. 30, 1985]

authority: 42 U.S.C. 7401-7671q.