| #D001 | | E&EC | Electrical and Electronic Components | high |
| #D002 | | direct | A point source that discharges pollutants to waters of the United States, such as streams, lakes, or oceans. | medium |
| #D003 | | indirect | A facility that discharges pollutants to a publicly owned treatment works (municipal sewage treatment plant). | medium |
| #D004 | | LEDs | light emitting diodes | high |
| #D005 | | TTO | Total Toxic Organics | high |
| #D006 | | NAICS | North American Industrial Classification System | high |
| #D007 | | Clean Water Act | primary federal law governing water pollution | high |
| #D008 | | Part 503 | EPA’s sewage sludge regulations, 40 CFR Part 503 | high |
| #D009 | | BAR | Biosolids Annual Report | high |
| #D010 | | major publicly owned treatment works | POTWs with a design flow rate greater than or equal to one million gallons per day | high |
| #D011 | | Class I sludge management facilities | treatment works that have an approved pretreatment program or have been classified as Class I sludge management facilities by the EPA or state | high |
| #D012 | | POTWs | publicly owned treatment works | high |
| #D013 | | CDX | Central Data Exchange | high |
| #D014 | | larger treatment works | treatment works that land apply, incinerate, or surface dispose of their sewage sludge and are 1) major publicly owned treatment works (POTWs with a design flow rate greater than or equal to one million gallons per day); 2) POTWs that serve 10,000 people; 3) Class I sludge management facilities (treatment works that have an approved pretreatment program or have been classified as Class I sludge management facilities by the EPA or state); or 4) are otherwise required to report by the EPA or permitting authority. | high |
| #D015 | | .gov website | belongs to an official government organization in the United States | high |
| #D016 | | https:// | means you’ve safely connected to the .gov website | high |
| #D017 | | EPA | U.S. Environmental Protection Agency | high |
| #D018 | | direct dischargers | A point source that discharges pollutants to waters of the United States, such as streams, lakes, or oceans. | high |
| #D019 | | indirect dischargers | A facility that discharges pollutants to a publicly owned treatment works (municipal sewage treatment plant). | high |
| #D020 | | Forming | the set of manufacturing operations in which metals and alloys are made into semi-finished products by hot or cold working. | high |
| #D021 | | Forming operations | include rolling (both hot and cold), extruding, forging, and drawing; also cladding, tube reducing, swaging, and metal powder production. | high |
| #D022 | | Ancillary operations | include casting for subsequent forming, heat treatment, surface treatment, surface coating, alkaline cleaning, solvent degreasing, product testing, and wet air pollution controls on forming operations and the associated operations. | high |
| #D023 | | Nonferrous metal | any pure metal other than iron, copper, or aluminum; or metal alloy for which a metal other than iron, copper, or aluminum is its major constituent by weight. | high |
| #D024 | | Alloys | The metal type of any particular alloy is defined to be the metal that is the major component in percent by weight except for precious metals (silver, gold, platinum, and palladium) and beryllium. | high |
| #D025 | | Precious metal alloy | Any alloy containing 30 or greater percent by weight of precious metals is considered a precious metal alloy. | high |
| #D026 | | Beryllium alloys | any alloy in which beryllium is present at 0.1 percent or greater by weight. | high |
| #D027 | | Metal powders | include nonferrous metals and alloys as previously described, along with iron, copper, and aluminum and their alloys. | high |
| #D028 | | Surface treatment | includes any chemical or electrochemical treatment applied to the surface of the metal. | high |
| #D029 | | POTWs | publicly owned treatment works | high |
| #D030 | | NFMF | Nonferrous Metals Forming and Metal Powders | high |
| #D031 | | Casting | Casting of nonferrous metals is included in the NFMF category when it is performed as an integral part of the nonferrous metals forming process and located at the same plant site at which nonferrous metals are formed. This includes shot-casting and casting of billets, ingots, bars, and strip which are subsequently formed on-site. | high |
| #D032 | | Metal powder production processes | include milling, abrading or atomizing. | high |