Read the finishing rules at the scope they actually have

Which rule applies is a determination

EPA’s summary of the metal finishing guidelines lists the same six operations as the regulation and notes that certain electroplating work falls under the separate electroplating category instead: job shops that own not more than 50% of the material they finish, independent printed circuit board manufacturers discharging indirectly, and operations in place before July 15, 1983. The page was last updated March 17, 2026.

40 CFR 433.10(b) then hands whole facilities to other categories—coil coating at part 465, porcelain enameling at 466, iron and steel at 420, aluminum forming at 467, and seven more—while 433.10(c) excludes existing indirect-discharging job shops and independent board manufacturers, who sit under part 413. Which part governs a given facility is a written determination somebody owns. It is not something a chemical supplier can read off a product.

Two provisions worth reading before sourcing

433.15(c) states that no user introducing wastewater pollutants into a publicly owned treatment works shall augment the use of process wastewater as a partial or total substitute for adequate treatment. The same anti-dilution sentence appears in the BPT, BAT, new-source and new-source-pretreatment sections. Additional rinse water is not a compliance strategy, and a sourcing decision made on that assumption is unsafe.

The TTO figure in those tables is defined at 433.11(e) as the summation of all quantifiable values greater than 0.01 mg/L across a listed set of toxic organics. 433.12(a) offers a certification alternative in lieu of TTO monitoring, conditioned on a solvent management plan that specifies the toxic organics used and how they are disposed of instead of being dumped. A solvent purchase can therefore land inside a plan the facility has already signed—worth checking before the order, not after.

The waste code can turn on the process, not the chemical

40 CFR 261.31 lists F006 as wastewater treatment sludges from electroplating operations, but excludes six processes by name, among them sulfuric acid anodizing of aluminum, tin plating on carbon steel, and zinc plating on carbon steel on a segregated basis. Cyanide baths carry separate listings: F007 for spent cyanide plating bath solutions, F008 for plating bath residues from the bottom of baths where cyanides are used, and F009 for spent stripping and cleaning bath solutions from the same, each coded (R, T). F019 covers wastewater treatment sludges from the chemical conversion coating of aluminum, with its own exclusions.

Read that list as a reason to name the operation precisely in the purchasing record. Two lines using the same acid can generate differently listed wastes, and the difference is the process, not the drum. Alliance does not make a waste determination for anyone’s stream; that belongs to the generator and its environmental professional.

An exposure limit is an obligation, not a product property

29 CFR 1910.1026 sets a permissible exposure limit for chromium (VI) of 5 micrograms per cubic meter of air as an 8-hour time-weighted average. An action level of 2.5 µg/m³ as an 8-hour TWA triggers periodic monitoring at least every six months, and exposures above the PEL require it at least every three months. The standard excludes a process only where the employer holds objective data showing that it cannot release Cr(VI) at or above 0.5 µg/m³ as an 8-hour TWA under any expected conditions of use.

Those numbers describe air in a workplace, not a specification on a delivered drum, and no purchase document can supply the exposure assessment. What a purchasing record can carry is the name of the person who owns that assessment and whether any objective-data exclusion has actually been established and written down. Handling requirements stay with the exact product SDS and the site procedure.

• Which effluent guideline part governs this facility, and who determined that?
• Does an existing solvent management plan constrain what may be purchased?
• Which waste listings does the operation generate, and who signs that determination?
• Who owns exposure assessment, and is any objective-data exclusion documented?

Requirement → evidence → decision boundary

An editorial checklist for your review—not a table of product specifications.

Revision record

1.0 · September 12, 2026 — Source-based editorial edition. No original testing or product qualification is claimed.

For finishers and their purchasing teams specifying bulk acids, bases and salts. This collection does not design a bath, set an operating concentration, qualify a process, or make a discharge, waste or exposure determination.