Code of Federal Regulations > Title 40 > Chapter I > Part 205 > Subpart B > Appendix Appendix I

Regulations last checked for updates: Jan 30, 2025

Title 40 - Protection of Environment last revised: Nov 08, 2025

Appendix Appendix I - Appendix I to Subpart B of Part 205

Table I—Sample Size Code Letters

Table II—Sampling Plans for Inspecting Batches

Sample size code letter	Test sample	Test sample size	Cumulative test sample size	Batch inspection criteria
Sample size code letter	Test sample	Test sample size	Cumulative test sample size	Acceptance No.	Rejection No.
A	1st	4	4	0	1
B	1st	3	3	0	1
C	1st	3	3	0	2
	2d	3	6	1	2
D	1st	2	2	( ¹)	2
	2d	2	4	( ¹)	2
	3d	2	6	0	2
	4th	2	8	0	3
	5th	2	10	1	3
	6th	2	12	1	3
	7th	2	14	2	3

¹ Batch acceptance not permitted at this sample size.

Table III—Batch Sequence Plans

Sample size code letter	Number of batches	Cumulative number of batches	Sequence inspection criteria
Sample size code letter	Number of batches	Cumulative number of batches	Acceptance No.	Rejection No.
A	2	2	1	( ²)
	2	4	2	4
	2	6	3	5
	2	8	4	5
B	2	2	0	( ²)
	2	4	1	4
	2	6	2	5
	2	8	3	5
	2	10	4	6
	2	12	5	6
C	2	2	( ¹)	2
	2	4	0	2
	2	6	0	3
	2	8	1	3
	2	10	2	4
	2	12	3	4
D	2	2	0	2
	2	4	1	3
	2	6	2	4
	2	8	3	4

¹ Batch sequence acceptance not permitted for this number of batches.

² Batch sequence rejection not permitted for this number of batches.

Table IV—Recommended Format for Vehicle Noise Data Sheet


Test Report Number:	Manufacturer:
VEHICLE:
Trade Name:	VIN:
Model Year:	Other Reference No:
Configuration Identification:	Category Identification:
Test Site Identification and Location:
INSTRUMENTATION:
Microphone Manufacturer:	Model No:	Serial No:
Sound Level Manufacturer:	Model No:	Serial No:
Calibrator Manufacturer:	Model No:	Serial No:
Other and Manufacturer:	Model No:	Serial No:
TEST DATA:
Approach Gear:	Date of Test:
Approach RPM:	Temp:	Wind:
Acceleration Test:
Deceleration Test:

Acceleration Test

		Run No.
		1	2	3	4	5
dBA	Left
	Right
Highest RPM attained in End Zone
	Calculated Sound Pressure		dBA
Deceleration Test with Exhaust Brake Applied
dBA	Left
	Right
	Calculated Sound Pressure		dBA
TEST Personnel:
(Name)
Recorded By:			Date:.........
(Signature)
Supervisor:			Title:.........
(Signature)

[41 FR 15544, Apr. 13, 1976, as amended at 42 FR 61460, Dec. 5, 1977]

authority: Secs. 6, 10, 11, 13, Pub. L. 92-574, 86 Stat. 1234 (42 U.S.C. 4905,4909,4910,4912

source: 41 FR 15544, Apr. 13, 1976, unless otherwise noted.