Staying Small While Generating a Ton
A coatings manufacturer in Ohio operates a batch mixing plant. In March it generated 14 fifty-five-gallon drums of spent xylene-based solvent (specific gravity 0.86), 3 drums of waste paint sludge, and, during a one-time tank cleaning, 2,400 gallons of wash water containing 8 ppm total cadmium at pH 11.2. The company has treated itself as a small quantity generator for three years: drums sit on a concrete pad with no secondary containment, the oldest is dated 14 months ago, and the contingency plan is a one-page memo. The plant also stores 12,000 pounds of a chemical on the EPCRA extremely hazardous substance list and 90,000 pounds of a flammable solvent. The plant manager asks whether he can simply ship the drums next month and 'stay small.'
1. Determine the facility's generator status for March and explain the consequences of that determination.
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Calculate the month, not the year. Fourteen drums of solvent: 55 gal x 8.34 lb/gal x 0.86 specific gravity is about 394 lb per drum, so roughly 5,520 lb, or about 2,500 kg. The 2,400 gallons of wash water is roughly 20,000 lb, or about 9,100 kg. March generation therefore exceeded 1,000 kg by a wide margin, which makes the plant a large quantity generator for that month regardless of what it has called itself for three years. Generator status is determined month by month, and the episodic-generation relief in 40 CFR 262.232 is available only to very small and small quantity generators, not to large quantity generators.
Consequences: large quantity generator standards apply, including an EPA identification number, the 90-day accumulation limit, personnel training, a contingency plan and emergency arrangements, container management and inspection, manifesting, and biennial reporting. A drum dated 14 months ago exceeds the 90-day limit many times over; combined with the absence of containment, that is both an open violation and an imminent-risk exposure. Characterize and ship the oldest containers first, and stop adding waste to the pad.
2. What waste determination and reporting obligations does this situation trigger? Be specific about what must be tested versus assumed.
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Waste determination: pH 11.2 does not make the wash water corrosive on its own, because the D002 threshold is 12.5 or higher, or 2.0 or lower. The 8 ppm cadmium is a total concentration, not a leaching result. Cadmium carries a toxicity characteristic (D006) at 1.0 mg/L by TCLP, so the water must be tested by TCLP before disposal; total metals cannot substitute for the leaching test. Document the spent solvent determination as well, whether by listing or by characteristic.
Reports and notifications: a biennial hazardous waste report while the site is a large quantity generator (due March 1 of even-numbered years); EPCRA Tier II by March 1 for the 12,000 lb of extremely hazardous substance (500 lb threshold) and the 90,000 lb of flammable solvent (10,000 lb threshold); a hazardous waste manifest and DOT shipping papers for each shipment; land disposal restriction notifications and waste analysis. No CERCLA release notification is triggered here, because this is inventory and disposal rather than a release to the environment.
3. Set out a corrective-action sequence and identify the judgement calls the plant manager must make.
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Sequence: stop adding waste to the pad; close, label, and inspect all containers; segregate incompatible materials. Characterize and manifest the oldest containers for shipment, verifying the EPA identification number, the transporter's and receiving facility's permits, and that the facility accepts the waste codes. Then fix the system: dated accumulation logs, weekly inspections, training with records, a real contingency plan coordinated with local responders, and a written determination procedure applied before any waste accumulates.
Judgement calls: how to document the accumulation-time exceedance and what caused it; whether to self-disclose under the state audit policy or EPA's audit policy, which generally require prompt disclosure and correction and may reduce penalties but do not cure the condition; and whether the one-time tank cleaning should be managed as an episodic event in future years so monthly totals are not accidentally pushed into large quantity generator status. The one-page memo is not a contingency plan; rewrite it to include emergency contacts, evacuation, spill response, and arrangements with the fire department.