40 CFR § 1090.90 - Acronyms and abbreviations.

---
identifier: "/us/cfr/t40/s1090.90"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 1090.90 - Acronyms and abbreviations."
title_number: 40
title_name: "Protection of Environment"
section_number: "1090.90"
section_name: "Acronyms and abbreviations."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "U"
subchapter_name: "AIR POLLUTION CONTROLS"
part_number: "1090"
part_name: "REGULATION OF FUELS, FUEL ADDITIVES, AND REGULATED BLENDSTOCKS"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 7414, 7521, 7522-7525, 7541, 7542, 7543, 7545, 7547, 7550, and 7601."
regulatory_source: "85 FR 78469, Dec. 4, 2020, unless otherwise noted."
cfr_part: "1090"
---


# 1090.90 Acronyms and abbreviations.

|  |  |
| --- | --- |
| 500 ppm LM diesel fuel | As defined in § 1090.80. |
| ABT | averaging, banking, and trading. |
| ARV | accepted reference value. |
| BOB | gasoline before oxygenate blending. |
| CARB | California Air Resources Board. |
| CFR | Code of Federal Regulations. |
| CG | conventional gasoline. |
| DFE | denatured fuel ethanol. |
| E0 | As defined in § 1090.80. |
| E10 | As defined in § 1090.80. |
| E15 | As defined in § 1090.80. |
| ECA marine fuel | As defined in § 1090.80. |
| EPA | Environmental Protection Agency. |
| GTAB | gasoline treated as blendstock. |
| IMO marine fuel | As defined in § 1090.80. |
| LAC | lowest additive concentration. |
| LLOQ | laboratory limit of quantitation. |
| MARPOL Annex VI | The International Convention for the Prevention of Pollution from Ships, 1973 as modified by the Protocol of 1978 Annex VI. |
| NAAQS | National Ambient Air Quality Standard. |
| NARA | National Archives and Records Administration. |
| NFSP | national fuels survey program. |
| NGL | natural gas liquids. |
| NIST | National Institute for Standards and Technology. |
| NSTOP | national sampling and testing oversight program. |
| PCG | previously certified gasoline. |
| PLOQ | pooled limit of quantitation. |
| ppm (mg/kg) | parts per million (or milligram per kilogram). |
| PTD | product transfer document. |
| R&D | research and development. |
| RCO | responsible corporate officer. |
| RFG | reformulated gasoline. |
| RFS | Renewable Fuel Standard. |
| RVP | Reid vapor pressure. |
| SIP | state implementation plan. |
| SQC | statistical quality control. |
| T10, T50, T90 | temperatures representing the points in a distillation process where 10, 50, and 90 percent of the sample evaporates, respectively. |
| TDP | transmix distillate product. |
| TGP | transmix gasoline product. |
| U.S. | United States. |
| U.S.C. | United States Code. |
| ULSD | ultra-low-sulfur diesel fuel. |
| VAR | volume additive reconciliation. |
| VCSB | voluntary consensus standards body. |

[85 FR 78469, Dec. 4, 2020, as amended at 90 FR 4342, Jan. 15, 2025]