40 CFR 420.21
§ 420.21 Specialized definitions.
United States · 40 CFR — Protection of Environment · Status: effective
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- Citation
- 40 CFR 420.21, § 420.21 Specialized definitions, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/188775
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Full text
As used in this subpart:
(a) For the sintering subcategory, the term product means sinter agglomerated from iron-bearing materials.
(b) The term dry air pollution control system means an emission control system that utilizes filters to remove iron-bearing particles (fines) from blast furnace or sintering off-gases.
(c) The term minimum level (ML) means the level at which the analytical system gives recognizable signals and an acceptable calibration point. For 2,3,7,8-tetrachlorodibenzofuran, the minimum level is 10 pg/L per EPA Method 1613B for water and wastewater samples.
(d) The term pg/L means picograms per liter (ppt = 1.0 × 10-12 gm/L).
(e) The term sintering means a process for agglomerating iron-bearing materials into small pellets (sinter) that can be charged to a blast furnace.
(f) The term wet air pollution control system means an emission control system that utilizes water to clean process or furnace off-gases.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.