We use cookies to improve your experience and save your reports. Privacy Policy

HomeRCRA CodesF ListF037
F List — Wastes From Non-Specific Sources Listed - toxic

RCRA Hazardous Waste Number

F037

Petroleum refinery primary oil/water/solids separation sludge—Any sludge generated from the gravitational separation of oil/water/solids during the storage or treatment of process wastewaters and oily cooling wastewaters from petroleum refineries. Such sludges include, but are not limited to, those generated in oil/water/solids separators; tanks and impoundments; ditches and other conveyances; sumps; and stormwater units receiving dry weather flow. Sludge generated in stormwater units that do not receive dry weather flow, sludges generated from non-contact once-through cooling waters segregated for treatment from other process or oily cooling waters, sludges generated in aggressive biological treatment units as defined in § 261.31(b)(2) (including sludges generated in one or more additional units after wastewaters have been treated in aggressive biological treatment units) and K051 wastes are not included in this listing. This listing does include residuals generated from processing or recycling oil-bearing hazardous secondary materials excluded under § 261.4(a)(12)(i), if those residuals are to be disposed of

Official source: 40 CFR Part 261 (eCFR)

Hazard Basis

Listed - toxic

Regulation

40 CFR Part 261

Need recovery options for a F037 stream?

Map recovery routes for F037

Classification

See the full F list

Manufacturing process wastes that arise across many industries: spent solvents (F001-F005), electroplating and metal finishing wastes (F006-F019), and others. The code follows the process, not the industry.

How F037 is handled

01

F-listed wastes carry the code from the process that produced them, in any industry.

02

The mixture rule applies: mixing an F-listed waste into another stream generally makes the whole stream F-listed.

03

Spent solvent F codes (F001-F005) are among the most commonly recycled RCRA streams - solvent recovery and fuel blending are established routes.

Other F-list codes

F001The following spent halogenated solvents used in degreasing: Tetrachloroethylene, trichloroethylene, methylene chloride, 1,1,1-trichloroethane, carbon tetrachloride, and chlorinated fluorocarbons; all spent solvent mixtures/blends used in degreasing containing, before use, a total of ten percent or more (by volume) of one or more of the above halogenated solvents or those solvents listed in F002, F004, and F005; and still bottoms from the recovery of these spent solvents and spent solvent mixturesF002The following spent halogenated solvents: Tetrachloroethylene, methylene chloride, trichloroethylene, 1,1,1-trichloroethane, chlorobenzene, 1,1,2-trichloro-1,2,2-trifluoroethane, ortho-dichlorobenzene, trichlorofluoromethane, and 1,1,2-trichloroethane; all spent solvent mixtures/blends containing, before use, a total of ten percent or more (by volume) of one or more of the above halogenated solvents or those listed in F001, F004, or F005; and still bottoms from the recovery of these spent solvents and spent solvent mixturesF003The following spent non-halogenated solvents: Xylene, acetone, ethyl acetate, ethyl benzene, ethyl ether, methyl isobutyl ketone, n-butyl alcohol, cyclohexanone, and methanol; all spent solvent mixtures/blends containing, before use, only the above spent non-halogenated solvents; and all spent solvent mixtures/blends containing, before use, one or more of the above non-halogenated solvents, and, a total of ten percent or more (by volume) of one or more of those solvents listed in F001, F002, F004, and F005; and still bottoms from the recovery of these spent solvents and spent solvent mixturesF004The following spent non-halogenated solvents: Cresols and cresylic acid, and nitrobenzene; all spent solvent mixtures/blends containing, before use, a total of ten percent or more (by volume) of one or more of the above non-halogenated solvents or those solvents listed in F001, F002, and F005; and still bottoms from the recovery of these spent solvents and spent solvent mixturesF005The following spent non-halogenated solvents: Toluene, methyl ethyl ketone, carbon disulfide, isobutanol, pyridine, benzene, 2-ethoxyethanol, and 2-nitropropane; all spent solvent mixtures/blends containing, before use, a total of ten percent or more (by volume) of one or more of the above non-halogenated solvents or those solvents listed in F001, F002, or F004; and still bottoms from the recovery of these spent solvents and spent solvent mixturesF006Wastewater treatment sludges from electroplating operations except from the following processes: (1) Sulfuric acid anodizing of aluminum; (2) tin plating on carbon steel; (3) zinc plating (segregated basis) on carbon steel; (4) aluminum or zinc-aluminum plating on carbon steel; (5) cleaning/stripping associated with tin, zinc and aluminum plating on carbon steel; and (6) chemical etching and milling of aluminumF007Spent cyanide plating bath solutions from electroplating operationsF008Plating bath residues from the bottom of plating baths from electroplating operations where cyanides are used in the process
View the full F list →

Where can a F037 stream go?

Recognized recovery routes for this waste family, ranked by typical recovery tier. Which route fits depends on your specific stream — composition, volume and region.

Oil recovery via reinsertion into refining

High recovery

Oil-bearing separation sludges returned to the petroleum refining process for oil recovery are excluded from solid waste regulation — the highest-value route for these streams.

40 CFR 261.4(a)(12) — oil-bearing residues returned to refining

Fuel blending & energy recovery

Medium recovery

Organic-bearing streams with usable fuel value can be blended and burned for energy recovery in permitted boilers and industrial furnaces instead of being incinerated as pure disposal.

40 CFR Part 266 Subpart H — burning for energy recovery

These are the typical routes for the F list. Your stream's actual options depend on its composition and where it sits.

Get the ranked options for your stream

Get buyer contacts for RCRA F037

Leave your work email. Our industrial desk sends verified company contacts with location-specific pricing and contract minimums for petroleum refinery primary oil/water/solids separation sludge—any sludge generated from the gravitational separation of oil/water/solids during the storage or treatment of process wastewaters and oily cooling wastewaters from petroleum refineries. such sludges include, but are not limited to, those generated in oil/water/solids separators; tanks and impoundments; ditches and other conveyances; sumps; and stormwater units receiving dry weather flow. sludge generated in stormwater units that do not receive dry weather flow, sludges generated from non-contact once-through cooling waters segregated for treatment from other process or oily cooling waters, sludges generated in aggressive biological treatment units as defined in § 261.31(b)(2) (including sludges generated in one or more additional units after wastewaters have been treated in aggressive biological treatment units) and k051 wastes are not included in this listing. this listing does include residuals generated from processing or recycling oil-bearing hazardous secondary materials excluded under § 261.4(a)(12)(i), if those residuals are to be disposed of — not generic benchmarks.

Reviewed by our industrial desk within 1 business day.

Related Resources

Deepen your understanding of industrial symbiosis and circular economy strategies.

Benefits of Industrial SymbiosisWhy turning waste streams into off-taker matches creates measurable economic and environmental valueHow AI Matching Technology WorksHow SymbioFlows pairs waste producers with verified off-takers at scaleCircular Economy GuideA practical introduction to closing material loops between industries