CHMM (IHMM): Split Transfer Hose, Damaged Berm, and a Storm Drain

This is reportable, and the reporting duty is immediate.

Clean Water Act section 311. A discharge of oil to navigable waters in a harmful quantity - any amount that causes a sheen on the water surface or violates a water quality standard - must be reported. Two hundred sixty gallons entering a storm drain that discharges to Mill Creek, with a drinking-water intake four miles downstream, meets that standard. The person in charge must notify the National Response Center immediately upon having knowledge. Do not wait for a sheen to be confirmed; the discharge has reached a water of the United States by any reasonable reading of the drainage path.

The trap: CERCLA does not apply to the oil itself. Petroleum is excluded from the definition of "hazardous substance" in CERCLA section 101(14). Diesel is therefore not a CERCLA hazardous substance and no CERCLA reportable quantity is triggered - and EPCRA section 304, which keys off CERCLA hazardous substances and extremely hazardous substances, likewise does not apply to the diesel alone. The obligation here is a CWA 311 obligation. Practitioners who run only a CERCLA RQ check on a fuel spill reach the wrong answer. (If the product had contained a listed hazardous substance above its RQ, CERCLA would be back in play.)

Additional notifications that are easy to miss.

• The state spill hotline and, in most states, the state environmental agency, which frequently has its own oil-spill notification requirement independent of the federal one.
• The downstream water utility, as a matter of operational necessity even where not legally required.
• Local emergency responders if the release threatens the creek.

Failure to notify is a separate violation from the discharge itself, and it carries criminal exposure. The NRC call should have been made the same night.

Coverage. Under 40 CFR 112.1, a non-transportation-related facility with aggregate aboveground oil storage capacity greater than 1,320 gallons is covered; containers of 55 gallons or more count toward the total. Here: 10,000 + 2,000 + 2,000 + 55 = 14,055 gallons. Clearly covered.

Secondary containment is undersized. Section 112.7(c) requires containment sufficient to hold the capacity of the largest single container plus sufficient freeboard for precipitation. The largest container is the 10,000-gallon tank; the berm is rated at 9,000 gallons. That is short by at least 1,000 gallons before accounting for freeboard, and the deformed curb means the effective capacity is lower still. This is a plan deficiency, not merely an unlucky night.

Certification level. A facility may self-certify as a Qualified Facility only if total oil storage capacity is 10,000 gallons or less and it has not had a single discharge over 1,000 gallons, or two discharges each over 42 gallons within any 12-month period, in the preceding three years (112.3(g)). At 14,055 gallons the plant cannot self-certify; the plan requires professional engineer certification. Note also that this 260-gallon release now counts against the Qualified Facility criteria for the next three years - relevant if the plant ever downsizes its inventory.

Plan currency. Two separate clocks are running:

• Section 112.5(a): review the plan at least every five years. Last amended 2021, so the review is due in 2026.
• Section 112.5(b): amend within six months of any change in facility design, operation, or maintenance that materially affects the potential for a discharge, and implement the amendment within six months of amending. The forklift-damaged curb, the failed transfer hose, and the containment shortfall are each such a change. Waiting for the 2026 review would be noncompliant.

Also verify that the plan contains the 112.7 elements: designated person and duties, personnel training, discharge prevention procedures, inspections and records, site security, and a facility diagram that actually shows the storm drain, its outfall, and the drainage path to Mill Creek.

On shutdown. The plant need not stop production, but the bulk transfer operation should not resume until containment and procedures are fixed. Continuing to run the one activity that just caused a discharge to a drinking-water source is not a defensible position, and the plant will be asked about it.

Immediate response (hours).

• Stop the source - already done - and secure the tanker connection.
• Notify the NRC and the state hotline; document the time of each call.
• Plug or dam the storm drain inlet and deploy booms at the outfall; recover free product rather than dispersing it.
• Notify the downstream water utility.
• Retain a response contractor, photograph and log everything, and retain disposal manifests for recovered product, oiled absorbents, and contaminated soil.

Physical fixes (before the next delivery).

• Repair or replace the damaged curb and re-rate the berm to hold at least 110% of the largest container - practically, the full 10,000 gallons plus freeboard.
• Install a normally closed drainage valve on the containment, locked shut during transfers, with the key controlled by the receiving operator.
• Line the transfer area with a containment pad sized to the hose volume, and add dry-break or breakaway couplings.
• Require an inspected, pressure-rated hose in place of the one that failed, with a documented inspection interval and retirement criteria.

Procedural and program fixes.

• Attendant present at the connection for the entire transfer, with a pre-transfer checklist: drain valve closed, containment empty, hose inspected, spill kit staged.
• A spill kit at the connection point, not in a storeroom 200 feet away.
• Monthly documented inspections under 112.7(e) that would have caught the curb damage in March.
• Amend the SPCC plan within six months under 112.5(b) to reflect the containment shortfall and the failed transfer, with PE re-certification, and update the facility diagram.
• Annual training and a drill, plus a management-of-change review for any future tank or transfer change.

Root cause. The proximate cause was a hose. The root causes were a deferred repair, containment that could never have held the largest tank, and a transfer procedure with no one watching the connection.