40 CFR 204.51 - Definitions.
(a)Portable air compressor or compressor means any wheel, skid, truck, or railroad car mounted, but not self-propelled, equipment designed to activate pneumatic tools. This consists of an air compressor (air end), and a reciprocating rotary or turbine engine rigidly connected in permanent alignment and mounted on a common frame. Also included are all cooling, lubricating, regulating, starting, and fuel systems, and all equipment necessary to constitute a complete, self-contained unit with a rated capacity of 75 cfm or greater which delivers air at pressures greater than 50 psig, but does not include any pneumatic tools themselves.
(b)Maximum Rated Capacity means that the portable air compressor, operating at the design full speed with the compressor on load, delivers its rated cfm output and pressure, as defined by the manufacturer.
(c)Model year means the manufacturer's annual production period which includes January 1 of such calendar year; Provided, that if the manufacturer has no annual production period, the term “model year” shall mean the calendar year.
(d)Compressor configuration means the basic classification unit of a manufacturer's product line and is comprised of compressor lines, models or series which are identical in all material respects with regard to the parameters listed in § 204.55-3.
(g)Noise emission test means a test conducted pursuant to the measurement methodology specified in § 204.54.
(h)Inspection Criteria means the rejection and acceptance numbers associated with a particular sampling plan.
(i)Acceptable Quality Level (AQL) means the maximum percentage of failing compressors that, for purposes of sampling inspection can be considered satisfactory as a process average.
(j)Batch means the collection of compressors of the same category or configuration, as designated by the Administrator in a test request, from which a batch sample is to be randomly drawn and inspected to determine conformance with the acceptability criteria.
(k)Batch sample means the collection of compressors that are drawn from a batch.
(o)Test sample size means the number of compressors of the same configuration in a test sample.
(t)Shift means the regular production work period for one group of workers.
(u)Failing compressor means that the measured noise emissions of the compressor, when measured in accordance with the applicable procedure, exceeds the applicable standard.
(v)Acceptance of a compressor means that the measured noise emissions of the compressor, when measured in accordance with the applicable procedure, conforms to the applicable standard.
(w)Test Compressor means a compressor used to demonstrate compliance with the applicable noise emissions standard.