[45 FR 33119, May 19, 1980, as amended at 46 FR 35247, July 7, 1981; 55 FR 22684, June 1,
1990; 70 FR 34561, June 14, 2005; 71 FR 40259, July 14, 2006]
Letters/Memoranda
• PRETREATMENT OF CHARACTERISTIC WASTES SUBJECT TO LAND DISPOSAL
RESTRICTIONS
•
REGULATORY REQUIREMENTS APPLICABLE TO TWO WASTE STREAMS THAT WOULD BE
BILAYERED THROUGH PHASE SEPARATION AT A LICENSED TSDF
•
SOLVENT-CONTAMINATED WASTEWATER FROM FRAGRANCE MANUFACTURE
•
END-USERS OF CHLORDIMEFORM EXEMPTION
• MIXTURE OF METHANOL AND SOLID WASTE WHICH DOES NOT EXHIBIT ANY
CHARACTERISTICS
General Resources for the Ignitability Characteristic
• Background document for the Ignitability characteristic
Test Methods
Test methods are not required by the Federal regulations to determine if a waste passes or
fails the characteristic of ignitability according to the RCRA regulatory definition at 40 CFR
261.21. To clarify, the test results of these methods cannot be used to directly classify a waste as
a D001 hazardous waste, nor can the results be used by themselves to definitively classify a
waste as non-hazardous. No specific test for defining ignitable solids or oxidizers is required by
the RCRA regulations, and only a waste meeting the narrative regulatory definitions at 40 CFR
261.21(a)(2) and/or 261.21(a)(4) is an ignitable hazardous waste because it is an ignitable solid
and/or an oxidizer. However, these test methods were developed to specifically illustrate the
ignitable and oxidizer properties of materials, including wastes, and their results provide relevant
and useful information that may be applied to knowledge of a waste in determining whether a
waste meets the 40 CFR 261.21(a) criteria.
• SW-846 Test Method for Ignitability of Solids – Test Method 1030
• SW-846 Test Method for Oxidizing Solids – Test Method 1040
• SW-846 Test Method to Determine Substances Likely to Spontaneously Combust -
Test
Method 1050
• Test Methods for Evaluating Solid Waste, Physical/Chemical Methods (SW-846) –
Sampling Plan
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