{"data":{"id":"us/40-cfr-appendix-i-to-part-204","jurisdiction":"us","citation":"40 CFR Appendix I to Part 204","heading":"Appendix I to Part 204","body":"Table I—Sample Size Code Letters\nBatch size Code letter\n4 to 8 A.\n9 to 15 B.\n16 to 25 C.\n26 and larger D.\nTable II—Sampling Plans for Inspecting Batches\nSample size code letter Test sample Test sample size Cumulative test sample size Batch inspection criteria\nAcceptance number Rejection number\nA 1st 4 4 0 1\nB 1st 3 3 0 1\nC 1st 3 3 0 2\n2d 3 6 1 2\nD 1st 2 2 (1) 2\n2d 2 4 (1) 2\n3d 2 6 0 2\n4th 2 8 0 3\n5th 2 10 1 3\n6th 2 12 1 3\n7th 2 14 2 3\n1 Batch acceptance not permitted at this sample size.\nTable III—Batch Sequence Plans\nSample size code letter Number batches Cumulative number batches Sequence inspection criteria\nAcceptance number Rejection number\nA 2 2 1 (1)\n2 4 2 4\n2 6 3 5\n2 8 4 5\nB 2 2 0 (1)\n2 4 1 4\n2 6 2 5\n2 8 3 5\n2 10 4 6\n2 12 5 6\nC 2 2 (2) 2\n2 4 0 2\n2 6 0 3\n2 8 1 3\n2 10 2 4\n2 12 3 4\nD 2 2 0 2\n2 4 1 3\n2 6 2 4\n2 8 3 4\n1 Batch sequence rejection not permitted for this number of batches.\n2 Batch sequence acceptance not permitted for this number of batches.\nTable IV—Recommended Format for Portable Air Compressor Noise Data Sheet\nTest report number:\nSubject:\nManufacturer: Model: Serial No.:\nRated speed: Rpm: Rated capacity: cfm (m3/in).\nConfiguration identification: Category identification:\nPortable air compressor identification No.: Build date:\nTest conditions:\nManufacturer's test site identification and location:\nReflecting plane composition:\nOperating speed as tested:\nBeginning of test rpm\nEnd of test rpm\nAir pressure supplied: psi (kg/cm2) Ambient wind speed______mph (km/hr)\nActual flow rate: cfm (m3/min.) Atmospheric pressure______psi (kg/cm2)\nTemperature: °F (°C)\nInstrumentation:\nMicrophone Manufacturer: Model No.: Serial No.:\nSound Level Meter Manufacturer: Model No.: Serial No.:\nCalibrator Manufacturer: Model No.: Serial No.:\nOther and Manufacturer: Model No.: Serial No.:\nData:\nSound levels (decibels) Background sound level at location 1 (decibels) Location\n1 2 3 4 5 Average sound level (decibels)\nA-Weighted\nTested by: Date:\nReported by: Date:\nSupervisory personnel: Title:\nTitle:","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER G—NOISE ABATEMENT PROGRAMS","PART 204—NOISE EMISSION STANDARDS FOR CONSTRUCTION EQUIPMENT"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"ae24c928ffcb9ec77b56a696c738792d6bfb17ce6eb4ea2f85101c2e2429eda0","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-204.59","next":"us/40-cfr-205.1"},"notice":"GroundRules: Original legal text. Not legal advice."}