40 CFR § 204.55-3 - Configuration identification.

---
identifier: "/us/cfr/t40/s204.55-3"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 204.55-3 - Configuration identification."
title_number: 40
title_name: "Protection of Environment"
section_number: "204.55-3"
section_name: "Configuration identification."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "G"
subchapter_name: "NOISE ABATEMENT PROGRAMS"
part_number: "204"
part_name: "NOISE EMISSION STANDARDS FOR CONSTRUCTION EQUIPMENT"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "(42 U.S.C. 4905), 86 Stat. 1237."
regulatory_source: "41 FR 2172, Jan. 14, 1976, unless otherwise noted."
cfr_part: "204"
---


# 204.55-3 Configuration identification.

(a) A separate compressor configuration shall be determined by each combination of the following parameters:

(1) The compressor type (screw, sliding vane, etc.).

(2) Number of compressor stages.

(3) Maximum pressure (psi).

(4) Air intake system of compressor:

(i) Number of filters;

(ii) Type of filters.

(5) The engine system:

(i) Number of cylinders and configuration (L-6, V-8, V-12);

(ii) Displacement;

(iii) Horsepower;

(iv) Full load rpm.

(6) Type cooling system, e.g., air cooled, water cooled.

(7) Fan:

(i) Diameter;

(ii) Maximum fan rpm.

(8) The compressor enclosure:

(i) Height, length, and width;

(ii) Acoustic material manufacturer, type, part number.

(9) The induction system (engine):

(i) Natural;

(ii) Turbocharged.

(10) The muffler:

(i) Manufacturer;

(ii) Manufacturer part number;

(iii) Quantity of mufflers used;

(11) Category parameters listed at § 204.55-2.