§261.21
Characteristic of Ignitability.
(a) A solid waste exhibits the characteristic of ignitability if
a representative sample of the waste has any of the following
properties:
(1) It is a liquid, other than an aqueous solution containing
less than 24 percent alcohol by volume and has flash point less
than 60C (140F), as determined by a Pensky-Martens Closed Cup
Tester, using the test method specified in ASTM Standard D9379 or
D9380 (incorporated by reference, see §260.11), or a Setaflash
Closed Cup Tester, using the test method specified in ASTM
Standard D327878 (incorporated by reference, see 260.11), or as
determined by an equivalent test method approved by the
Administrator under procedures set forth in 260.20 and 260.21.
(2) It is not a liquid and is capable, under standard temperature
and pressure, of causing fire through friction, absorption of
moisture or spontaneous chemical changes and, when ignited, burns
so vigorously and persistently that is creates a hazard.
(3) It is an ignitable compressed gas as defined in 49 CFR
§173.300 and as determined by the test methods described in that
regulation or equivalent test methods approved by the
Administrator under §§260.20 and 260.21.
(4) It is an oxidizer as defined in 49 CFR §173.151.
(b) A solid waste that exhibits the characteristic of
ignitability, has the EPA Hazardous Waste Number of D001.
[45 FR 33119, May 19, 1980, as amended at 46 FR 35247, July 7,
1981; 55 FR 22684, June 1, 1990]