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The Hazardous Substance Facility Response Plan Threshold Is 1,000 Times the Reportable Quantity, and Plans Are Now Due June 1, 2030
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The Hazardous Substance Facility Response Plan Threshold Is 1,000 Times the Reportable Quantity, and Plans Are Now Due June 1, 2030

The hazardous substance Facility Response Plan threshold is 1,000 times the reportable quantity. Most guidance says 10,000. Plans are due June 1, 2030.

by iSi Environmental

The Hazardous Substance Facility Response Plan Threshold Is 1,000 Times the Reportable Quantity, and Plans Are Now Due June 1, 2030

If your compliance file says a Clean Water Act hazardous substance Facility Response Plan kicks in at 10,000 times the reportable quantity, that file is describing a rule EPA abandoned. The 2022 proposal used a 10,000x multiplier. The final rule, published March 28, 2024 at 89 FR 21924, set the applicability threshold at 1,000 times the reportable quantity (40 CFR 118.3(a)). EPA said in the final rule that 1,000x “will more appropriately screen” for covered facilities and acknowledged it “results in substantially more covered facilities” than what it proposed.

That is a factor of ten, and the error runs in the direction that hurts. A plant screening itself against 10,000x will clear the threshold on paper while sitting well above the number that actually governs. We still see the 10,000x figure in guidance summaries, vendor one-pagers, and internal applicability memos written in 2022 and never revisited. The number was wrong the day the final rule published and it has been wrong for two and a half years.

The second thing worth knowing happened last week. EPA signed a final rule on October 8, 2026 that pushes the plan submission deadline from June 1, 2027 to June 1, 2030 (91 FR 64774). Three extra years is real relief on the planning work. It is not relief on the coverage question, because the rule that decides whether you are covered was not touched.

What the Rule Is, and What Number Actually Triggers It

What is a Clean Water Act hazardous substance Facility Response Plan?

It is a worst-case-discharge response plan required by 40 CFR Part 118, finalized at 89 FR 21924 on March 28, 2024. Covered onshore non-transportation-related facilities must plan for a worst case discharge of a CWA hazardous substance listed at 40 CFR 116.4 into or toward navigable waters, and submit the plan to their EPA Regional Administrator.

Part 118 is the hazardous substance companion to the oil program most facility managers already know from 40 CFR Part 112. Same statutory authority, Clean Water Act section 311(j). Different substance list, different threshold arithmetic, separate plan. The rulemaking record runs 2022 proposal, 2024 final rule at 89 FR 21924, an advance notice reopening parts of the rule in February 2026 at 91 FR 7415, and the October 2026 deadline change at 91 FR 64774. Anything written against only the first of those four is describing a rule that no longer exists.

What quantity of hazardous substance triggers a Facility Response Plan?

40 CFR 118.3(a) sets the threshold at a maximum onsite quantity that meets or exceeds 1,000 times the Reportable Quantity at 40 CFR 117.3 for any substance listed at 40 CFR 116.4. EPA proposed 10,000x in 2022 but finalized 1,000x, stating it “results in substantially more covered facilities.” Peak inventory governs, not average.

Two words in that provision do most of the work. “Maximum” means the highest quantity onsite at any time, so the number you run is your peak tank-plus-tote-plus-drum inventory on your worst day, not an annual average and not throughput. “Any” means the test runs substance by substance. One substance over 1,000x its own RQ satisfies the criterion no matter how modest the rest of your inventory looks.

The arithmetic is simple enough to do in an afternoon. Pull the 40 CFR 116.4 list, match it against your chemical inventory, find each substance’s RQ at 40 CFR 117.3, and divide peak quantity by RQ. Any quotient of 1,000 or higher and criterion one is met. Before you conclude you are over, run the exceptions and exemptions at § 118.8 and the mixtures rule at § 118.9. A listed substance present only in dilute mixture is treated differently, and that is where a first-pass calculation most often overstates exposure.

The Deadline Moved to 2030. The Coverage Test Did Not Move at All.

Did EPA delay the Facility Response Plan deadline?

Yes. EPA signed a final rule October 8, 2026 extending the submission deadline three years, from June 1, 2027 to June 1, 2030 (91 FR 64774, effective December 14, 2026). EPA scored it deregulatory at $25.97 million annualized savings at a 7% discount rate, and also removed climate-change and environmental-justice language from Part 118.

The rule is FR Doc. 2026-20849, RIN 2050-AH38, scheduled for Federal Register publication October 13, 2026. For comparison, EPA priced the underlying 2024 rule at $112.4 million annualized at 7% in 2022 dollars. The delay recovers a fraction of that per year by moving the spend later, not by removing it.

When is the hazardous substance Facility Response Plan due?

June 1, 2030 for initially regulated facilities, under the final rule at 91 FR 64774 (FR Doc. 2026-20849), publishes in the Federal Register on October 13, 2026 and takes effect December 14, 2026. Until that effective date, 40 CFR 118.4(a)(1) still reads June 1, 2027 for facilities in operation on November 30, 2026.

Read that gap carefully if you are building a compliance calendar this quarter. The eCFR text in force today says June 1, 2027. It is correct today. It stops being correct on December 14, 2026, when the new rule takes effect and the date in § 118.4 becomes June 1, 2030. The rule also sets separate revised timelines for newly regulated facilities, newly constructed facilities, and facilities that change in a way that pulls them into coverage.

November 30, 2026 is the date that still matters right now. That is the “in operation on” date that fixes which facilities fall in the initially regulated population under § 118.4(a)(1). It arrives in seven weeks and no extension moved it.

Does the three-year delay mean my facility is no longer covered?

No. The October 2026 rule changed the submission deadline and removed certain climate and environmental-justice references. It did not amend the 40 CFR 118.3 applicability test. A facility covered today remains covered. It has until June 1, 2030 to submit rather than June 1, 2027.

This is the part that gets lost when a deadline extension makes the trade press. Two separate questions live in Part 118: are you in scope, and when is the paperwork due. October’s rule answered only the second one. Section 118.3 reads today exactly as it read in March 2024.

The practical consequence of treating the delay as a stand-down is a scheduling problem you inherit in 2029. Running an applicability determination, calculating a worst case discharge, writing the plan, and completing the coordination work with local and regional responders is a three-to-six-month exercise at a single site. Against a hard June 2030 date with no further extension promised, a facility that has not yet answered the coverage question is deciding to do that work in a market where every other covered facility is doing it at the same time.

The Coverage Test Has Three Parts, and They All Have To Be True

Section 118.3 is an AND test. A facility is covered only if it satisfies the quantity criterion, the location criterion, and at least one substantial harm criterion. That structure cuts both ways. Plenty of facilities handling listed substances are outside the rule, and plenty of facilities that assume distance from water protects them are inside it.

Does the FRP rule apply to my facility if it is not next to a river?

Possibly. 40 CFR 118.3(b) measures one-half mile from the facility boundary or the nearest opportunity for discharge to navigable waters or a conveyance to navigable waters. A storm sewer, ditch, or culvert that reaches navigable water counts as a conveyance, which pulls in inland facilities with no waterfront at all.

Both halves of that sentence are where self-screening goes wrong. Facilities measure from the front gate or the property line when the rule measures from the nearest opportunity for discharge, which is usually a loading rack, a tank farm berm, or a transfer point sitting closer to the drainage than the fence is. And facilities measure to the nearest river when the rule also counts anything that conveys to the river. A plant two miles from the nearest creek with a yard drain tied into a municipal storm system is inside the half-mile radius of a conveyance, which is the criterion that matters.

If you are going to spend engineering time on one part of this determination, spend it here. Walk the site drainage with the plat and the storm sewer map together, and document where the water goes from each point a release could occur.

What are the four substantial harm criteria in 40 CFR 118.3(c)?

Ability to cause injury to fish, wildlife and sensitive environments; ability to adversely impact a public water system; ability to cause injury to public receptors; and a reportable discharge under 40 CFR 117.21 in the last five years that reached navigable waters. Meeting any one satisfies the criterion (40 CFR 118.3(c)).

One of four, not four of four. That correction matters because three of the four are capability-based rather than event-based. They ask what a discharge from your site could do, not what one has done. A facility over threshold and inside the half-mile radius should assume the third criterion is met and work to disprove it, because the burden of showing that a worst case discharge of 1,000 RQ-multiples of a listed substance could not injure fish, wildlife, a public water system, or a public receptor is a technical argument, not a checkbox.

Only non-transportation-related onshore facilities are in scope. EPA’s Table 1 in the 2024 final rule named the sectors it considered potentially affected and said the list is not exhaustive: Oil and Gas Extraction (NAICS 211), Utilities (221), Food Manufacturing (311), Petroleum and Coal Products Manufacturing (324), Chemical Manufacturing (325), Primary Metal Manufacturing (331), Warehousing and Storage (493), and Waste Management and Remediation (562). Being outside those NAICS codes is not a defense. The test is in § 118.3, not in Table 1.

What do I file if I decide my facility is not covered?

If the facility meets the quantity and proximity criteria but you conclude it does not meet any substantial harm criterion, complete the Substantial Harm Certification Form at Appendix A to 40 CFR Part 118 and retain it at the facility. That form is the documented record of a negative applicability determination.

Almost nothing written about this rule covers Appendix A, and it is the single highest-value hour in the whole exercise for a facility that screens out. An undocumented “we looked at it and we’re fine” is worth nothing in an inspection or after a release. A signed certification form with the RQ arithmetic attached, the proximity measurement behind it, and the substantial harm analysis written down is the record that closes the question.

Keep the arithmetic either way. The per-substance RQ multiple is the entire basis of the coverage decision, and it is the first thing anyone will ask for.

Penalty Exposure, and What Enforcement Actually Looks Like Before 2030

What is the penalty for not having a required Facility Response Plan?

Failure to comply with a regulation issued under CWA section 311(j) carries up to $59,114 per day of violation under 40 CFR 19.4 Table 1 (33 U.S.C. 1321(b)(7)(C); statutory $25,000 per day, inflation-adjusted, for penalties assessed on or after January 8, 2025). A discharge adds $59,114 per day or $2,364 per reportable-quantity unit.

Gross negligence sits in its own tier at a $236,451 minimum under 1321(b)(7)(D). The per-unit figure is the one that scales badly: $2,364 multiplied by the number of reportable quantities discharged, at a facility whose inventory is by definition at least 1,000 RQ of something.

Be honest about the timing of that exposure, because the usual version of this article is not. Enforcement of Part 118 has not started. No plan has been due yet, the first deadline is now June 1, 2030, and there is no population of late or deficient hazardous substance FRPs for EPA to act against. CWA 311(j) regulations are enforced administratively under 33 U.S.C. 1321(b)(6) and judicially under 1321(b)(7), and the per-day figures at 40 CFR 19.4 apply to any 311(j) regulation, Part 112 included. The realistic near-term scenario is narrower and worse: a reportable discharge under 40 CFR 117.21 at a facility that never ran its applicability determination. That converts a paperwork gap into a documented failure to plan sitting alongside the discharge penalty.

If you want the inspection-level view of what EPA actually finds in facility response plans, we covered the recurring deficiencies in the top four Facility Response Plan issues found by EPA.

What Could Still Change, and What Is Not Going To

Is EPA going to change the FRP applicability threshold again?

Possibly. EPA published an advance notice of proposed rulemaking on February 18, 2026 (91 FR 7415, docket EPA-HQ-OLEM-2025-1707) asking whether the 1,000x RQ multiplier should be reconsidered or replaced with a single threshold quantity, and seeking comment on de minimis exemptions, proximity measurement, and the substantial harm criteria. Nothing is proposed yet.

The counter-signals on this rule are stronger than anything you will read in a compliance alert, and a facility that acts on only one side of the record will be wrong. Here is the full picture.

The deadline moved later, and EPA scored the move as deregulatory. 91 FR 64774 delays submission by three years and books $25.97 million in annualized savings at 7% ($17.95 million at 3%, 2024 dollars). This is a rule in retreat on timing.

The applicability test itself is open for reconsideration. The February 2026 ANPRM asks whether the 1,000x multiplier should change or be replaced by a flat threshold quantity, whether small container sizes and low concentrations should be exempt, whether proximity should be measured point-to-point, and whether substances already inside Part 112-regulated oils should be carved out. The provision that creates coverage is on the table.

EPA removed protective framing rather than adding it. The October 2026 rule strips climate-change language from the adverse weather definition and from §§ 118.5 and 118.11, replaces the environmental-justice language at § 118.5(b)(8) with “potentially exposed or susceptible populations,” and deletes two provisions from § 118.5(b), citing Executive Order 14148.

Penalty escalation stopped. The 2026 federal civil monetary penalty inflation adjustment was cancelled, so the figures assessed on or after January 8, 2025 remain operative through 2026. EPA and OSHA numbers are flat year over year instead of climbing.

Now the other side, and this is our actual position. None of that changed a single word of § 118.3. An ANPRM is a question, not a proposal, and the gap between an advance notice and a final amended threshold is measured in years. A facility that reads the delay plus the ANPRM as permission to stand down has made a bet that EPA will finish a second rulemaking, narrow the threshold, and do it before June 2030. The defensible practitioner position costs an afternoon: run the applicability determination against today’s rule, document it, file the Appendix A form if you screen out, and then decide how much plan-writing the 2030 date justifies.

How This Fits With the Spill Plans You Already Have

How does the hazardous substance FRP differ from an oil FRP or an SPCC plan?

An SPCC plan (40 CFR 112.3) addresses oil spill prevention. An oil FRP (40 CFR 112.20) addresses worst-case oil discharge response. Part 118 is a separate program for the CWA hazardous substances listed at 40 CFR 116.4. A facility can owe all three, and EPA’s February 2026 ANPRM asked whether substances already in Part 112-regulated oils should be exempt.

Three programs, one site, no automatic credit between them. An existing SPCC plan does not satisfy Part 118, and an oil FRP does not either, because the substance lists and the worst case discharge calculations are different. What does carry over is the work product: site drainage mapping, secondary containment detail, response contractor arrangements, and the coordination relationships built for Part 112 all feed the Part 118 plan. If you are going to be covered, building the hazardous substance plan off the existing oil documentation is the cheaper path.

Do state rules change hazardous substance FRP requirements in Kansas, Oklahoma, Texas, Missouri or Nebraska?

No. 40 CFR Part 118 is a federal program with no state delegation. Plans go to the EPA Regional Administrator, which means Region 7 for Kansas, Missouri, Nebraska and Iowa, and Region 6 for Texas, Oklahoma, Arkansas, Louisiana and New Mexico. State spill and SPCC-analog programs may add obligations but do not substitute for Part 118.

Colorado facilities submit to Region 8. No state in iSi’s service area has an approved substitute program for hazardous substance FRPs, so there is no state agency to call and no state form to file. The plan goes to the region.

State programs still matter alongside Part 118, not in place of it. A reportable discharge triggers state notification requirements on their own clocks, and several states run their own spill plan and secondary containment rules for the same tanks. Those obligations stack.

What To Do Between Now and November 30

  1. Run the § 118.3 arithmetic and write it down. Peak onsite quantity for every 40 CFR 116.4 substance, divided by its RQ at 40 CFR 117.3. Any quotient of 1,000 or higher meets criterion one.
  2. Check § 118.8 and § 118.9 before you conclude you are over. Exceptions, exemptions, and the mixtures rule can move a dilute-mixture facility back under the line.
  3. Measure proximity from the nearest opportunity for discharge. Not the gate. Walk the drainage and include every storm sewer, ditch, and culvert that reaches navigable water within a half mile.
  4. Document the substantial harm analysis. One of four criteria is enough, and three of the four are capability-based.
  5. File the Appendix A certification form if you screen out on substantial harm after meeting quantity and proximity, and keep it onsite with the arithmetic attached.
  6. If you are covered, scope the plan work now and schedule it against June 1, 2030. Worst case discharge under § 118.10 with the Appendix B toxicity endpoints, plan content under § 118.11, coordination with local and regional response authorities under § 118.12, and training, drills and exercises under § 118.13.
  7. Re-run applicability after any change in inventory, process, or site drainage. The October 2026 rule sets its own submission clock for facilities that become regulated later.

The determination is the whole game here, and it is cheap compared to what it decides. An afternoon of RQ arithmetic and a drainage walk tells you whether your site owes a worst case discharge plan by 2030 or a signed certification form in a drawer. Getting it wrong in the optimistic direction, which is what the 10,000x number does, means finding out during a release investigation.

iSi runs Part 118 applicability determinations, worst case discharge calculations, and facility response plan development for manufacturers, utilities, and bulk storage operations across 40 states, and we do it alongside the SPCC and oil FRP work most of these sites already have on the books. If your current applicability memo cites 10,000 times the reportable quantity, or if nobody has looked at the question since the 2022 proposal, that is the file to pull first. Talk to us and we will tell you in one conversation whether you have a live coverage question or a documentation item. Facilities with Class I injection wells or other permitted discharge infrastructure should also read our note on Class I underground injection control permit requirements, since the same site drainage and discharge-point mapping supports both determinations.

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