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e-CFR data is current as of November 24, 2020

Title 40Chapter ISubchapter CPart 90Subpart F → Appendix


Title 40: Protection of Environment
PART 90—CONTROL OF EMISSIONS FROM NONROAD SPARK-IGNITION ENGINES AT OR BELOW 19 KILOWATTS
Subpart F—Selective Enforcement Auditing


Appendix A to Subpart F of Part 90—Sampling Plans for Selective Enforcement Auditing of Small Nonroad Engines

Table 1—Sampling Plan Code Letter

Annual engine family sales Code letter
50-99A
100-299B
300-499C
500 or greaterD

Table 2—Sample Plan for Code Letter “A”

[Sample inspection criteria]

StagePass No.Fail No.StagePass No.Fail No.1
  1(1)(2)16  611
  2(1)(2)17  712
  3(1)(2)18  712
  4  0(2)19  813
  5  0(2)20  813
  6  1  621  914
  7  1  7221014
  8  2  7231015
  9  2  8241115
10  3  8251116
11  3  8261216
12  4  9271217
13  510281317
14  510291417
15  611301617

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]

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  410
14  510
15  511
16  612
17  612
18  713
19  813
10  814
21  914
22  915
231015
241016
251116
261117
271217
281218
291318
301319
311419
321420
331520
341621
351621
361722
371722
381822
391822
402122

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]

StagePass No.Fail No.
  1(1)(2)
  2(1)(2)
  3(1)(2)
  4(1)(2)
  50(2)
  606
  717
  827
  928
1039
1139
12410
13410
14511
15511
16612
17612
18713
19713
20814
21814
22915
231015
241016
251116
261117
271217
281218
291318
301319
311419
321420
331520
341521
351621
361622
371722
381823
391823
401924
411924
422025
432025
442126
452127
462227
472227
482327
492327
502627

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]

StagePass No.Fail No.
  1(1)(2)
  2(1)(2)
  3(1)(2)
  4(1)(2)
  50(2)
  606
  717
  828
  928
1039
1139
12410
13410
14511
15511
16612
17612
18713
19713
20814
21814
22915
23915
241016
251116
261117
271217
281218
291319
301319
311420
321420
331521
341521
351622
361622
371723
381723
391824
401824
411925
421926
432026
442127
452127
462228
472228
482329
492329
502430
512430
522531
532531
542632
552632
562733
572733
582833
592833
603233

1Test sample passing not permitted at this stage.

2Test sample failure not permitted at this stage.

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