NSPS Notebook

Grain Elevators - Subpart DD

Applicability:Applies to any affected facility at any grain terminal elevator or any grain storage elevator. Affected facilities include: each truck unloading station, truck loading station, barge and ship unloading station, barge and ship loading station, railcar loading station, railcar unloading station, grain dryer, and all grain handling operations. Applies to affected facilities that commence construction, modification, or reconstruction after August 3, 1978.

Grain terminal elevators are any grain elevator which has a permanent storage capacity of more than 2.5 million U.S. bushels, except those located at animal food manufacturers, pet food manufacturers, cereal manufacturers, breweries, and livestock feedlots.

Grain storage elevators are any grain elevator located at any wheat flour mill, wet corn mill, dry corn mill (human consumption), rice mill, or soybean oil extraction plant which has a permanent storage capacity of 1 million bushels.

Permanent storage capacity means grain storage capacity which is inside a building, bin, or silo.

Modifications (by themselves) do not include:
(1) addition of gravity loadout spouts to existing grain storage or grain transfer bins.
(2) installation of automatic grain weighing scales.
(3) replacement of motor and drive units driving existing grain handling equipment.
(4) installation of permanent storage capacity with no increase in hourly grain handling capacity.

If the installation of permanent storage capacity increases over the applicability threshold (previous existing storage capacity below threshold), then only the affected facilities that were added or modified (i.e. increased hourly grain handling capacity) are subject to NSPS Subpart DD. The facility should document which affected facilities were added or modified due to the installation of storage capacity.
Known Sources in NDEQ Jurisdiction:
Date of Original Final Rule:08/03/1978
Amendments Dates:10/17/2000 (65 FR 61759)
2/14/1989 (54 FR 6674)
11/5/1987 (52 FR 42434)
State Regulations:Title 129, Chapter 18, Section 001.19
Federal Regulations:40 CFR 60.300
Related Rules:
NESHAP - 40 CFR Part 63
Subpart CCCC - Nutritional yeast manufacturing
Subpart GGGG - Solvent Extraction for vegetable oil production
Subpart DDDDDDD - Prepared feeds manufacturing
Regulations and Federal Registers:eCFR Subpart DD [ecfr.gov]
FAQs, Fact Sheets, and Rule Summaries:Rule Flowchart - Texas CEQ [tceq.state.tx.us]

EPA determination related to permanent grain storage.11-21-07 Response to National Grain & Feed Association0001.pdf

EPA determinations related to expansions and capacity.
1982 EPA applicability - grain storage expansion.pdf
2-2005- EPA capacity and expansion applicability.pdf
Other Information & Resources:Ethanol (fuel) plants typically have grain terminal elevators, because the operations are dry mills (not for human consumption). Ethanol plants that produce other products besides fuel/industrial grade ethanol (such as sucrose, fructose, glucose, starch) typically have grain storage elevators, because they have wet corn mills or dry corn mills (for human consumption).

Grain is corn, wheat, sorghum, rice, rye, oats, barley. This subpart applies to the whole grain, not the milled grain. Mills may have similar controls (baghouses on process and handling equipment) to prevent grain dust explosions and to retain product (grain dust collected in baghouse may be added back to process line).
Page Last Updated:07/06/2012

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Nebraska Department of Environmental Quality
1200 "N" Street, Suite 400
P.O. Box 98922
Lincoln, Nebraska 68509
(402) 471-2186