LDAR Delay of Repair: Grounds, Deadlines, and Reporting

Under federal Leak Detection and Repair rules, a leaking valve, pump, or connector must be fixed within 15 days of detection. LDAR Delay of Repair status extends that window when the component cannot be repaired without shutting down the entire process unit. The delay is not automatic and not open-ended: it applies only to specific grounds listed in 40 CFR Part 60 and Part 63, requires a documented first attempt at repair, and carries its own monitoring, recordkeeping, reporting, and post-repair verification obligations.

Grounds That Qualify for a Delay

The core standard is technical infeasibility. A delay is permitted when the repair cannot be completed within 15 days without a process unit shutdown.¹ If the leaking component can be valved off or bypassed while production continues, it is not technically infeasible to repair, and the delay will not stand.

A few additional grounds are recognized:

Equipment that has been isolated from the process and is no longer in VOC or HAP service.²
Valves and connectors where the facility can demonstrate that the material vented during a shutdown and purge would exceed the fugitive emissions from leaving the leak in place until the next scheduled shutdown.¹
Pumps requiring installation of a dual mechanical seal system with a barrier fluid, provided the repair is completed within six months of detection.²

Cost, staffing shortages, and scheduling convenience are not on that list. The regulations enumerate the qualifying justifications, and everything else falls outside them. Inspectors are familiar with attempts to stretch “technically infeasible” into “operationally inconvenient” and reject them.

One bright-line exclusion sits inside Part 63: delay of repair is not allowed for pumps in light liquid service, valves in gas/vapor or light liquid service, and connectors in ethylene oxide service.² If your facility handles ethylene oxide, DOR is off the table for those components and leaks must be repaired within the standard 15 days regardless of shutdown feasibility.

The First Attempt at Repair Comes First

You cannot move a component straight onto the delay list. The regulations require a first attempt at repair within five calendar days of detecting the leak.³ Only after that attempt fails and the 15-day window proves insufficient does DOR become available.

For valves, a first attempt includes tightening or replacing bonnet bolts, tightening packing gland nuts, and injecting lubricant into lubricated packing. For pumps, it means tightening the packing gland nuts and verifying the seal flush is operating at design pressure and temperature.³ These are physical maintenance steps. Skipping them and jumping to DOR is a compliance gap inspectors find quickly.

The failed attempt itself becomes part of the justification. Document the date it was performed and the reason it did not resolve the leak before adding the component to the delay list.

Equipment-Specific Deadlines

Pumps

When a pump leak requires upgrading to a dual mechanical seal system, the repair must be completed as soon as practicable and no later than six months after detection.¹ Six months is a hard cap whether or not a shutdown falls within that window.

Valves

Valves follow the standard rule of repair by the next process unit shutdown. If a valve needs full assembly replacement and the facility’s valve assembly supplies have been depleted despite having been adequately stocked, the delay can extend further, but the two frameworks draw the line in different places. Under Part 63, the delay cannot extend past the second subsequent shutdown unless that third shutdown falls within six months of the first.² Under Part 60, the delay cannot extend past the next shutdown unless that shutdown occurs sooner than six months after the first.¹ Knowing which standard applies to your unit matters.

Clearing the List Without a Shutdown

A leaking pump, valve, or connector on the delay list can be considered repaired and removed from DOR status if two consecutive monthly monitoring readings fall below the applicable leak definition threshold.¹ For valves under Part 60, the leak definition is 500 ppm or greater.⁴ Track this actively. It removes components from the queue without waiting for a turnaround.

Using the Emissions-Comparison Justification

The comparison justification for valves and connectors requires actual math. Estimate the fugitive emission rate from the leak and compare it to the emissions that would result from depressurizing, purging, and restarting the system to repair the component immediately. When the one-time shutdown release exceeds the projected leak emissions, the delay is justified. When it does not, you fix the leak.

The regulations add a condition. When the delayed repair eventually happens, the purged material must be collected and routed to a control device rather than vented to atmosphere.¹ The delay does not excuse emissions control during the repair itself.

Monitoring While the Component Sits on the List

Placing a component on DOR does not pause monitoring. Delayed equipment must continue to be monitored during the facility’s regular LDAR schedule. The federal rules do not mandate a heightened frequency, but your facility’s Title V permit or state program may. Check the permit language before assuming the standard schedule is enough.

Ongoing readings do two things. They show whether the leak is stable or worsening, which matters especially when the delay rests on the emissions-comparison justification. They also feed the two-consecutive-monthly-readings pathway that can remove a component from the list without a shutdown.¹ A gap in follow-up readings signals neglect to a regulator, even when the delay itself was properly justified.

Documentation and Semiannual Reporting

Weak documentation is the most common way facilities lose an otherwise defensible delay. Every component on the list needs a record identifying the leaking equipment, the date the leak was detected, the date of the first repair attempt, and the instrument identification number and operator name from the monitoring event.⁵ The record must also capture the dates of any process unit shutdowns that occur while the component remains unrepaired.

When parts unavailability is the reason for the delay, the bar rises. You need a description of the failure, an explanation of why replacement parts were not kept on-site, and the manufacturer’s scheduled delivery date.⁵ Regulators want to see that your facility stocked parts in good faith. “We didn’t have the part” without evidence of a stocking program is not a defense.

DOR information also has to appear in the semiannual compliance reports submitted to EPA. Each report specifies the number of components with unrepaired leaks, explains each delay including why shutdown was technically infeasible, and lists the dates of any shutdowns during the reporting period.⁶ A component that reappears across multiple reports needs a fresh explanation each cycle.

Repair at Shutdown and 15-Day Verification

The default deadline is repair before the end of the next process unit shutdown. Post-repair verification monitoring must occur within 15 days of process unit startup.¹ Results go into the LDAR database to formally close the delay entry.

Missing the 15-day verification window is a common oversight during the pressure of a turnaround, and it converts an otherwise compliant repair into a recordkeeping violation. Letting a shutdown pass without addressing a delayed component is worse. The DOR framework assumes repair at the next available opportunity, and skipping that opportunity invites enforcement action.

Penalties for Getting It Wrong

Clean Air Act civil penalties for LDAR violations are assessed per violation, per day. As of January 2025, the inflation-adjusted maximum is $124,426 per violation per day.⁷ Exposure compounds when several components on the delay list have incomplete documentation or missed repair deadlines. A single turnaround that leaves five delayed repairs unaddressed can generate six-figure daily exposure.

Beyond fines, serious or repeated DOR violations can lead to consent decrees imposing enhanced monitoring schedules, third-party auditing, and mandatory equipment upgrade timelines. These are usually more operationally disruptive than the penalties themselves. Facilities that manage DOR well treat the list as a live compliance obligation with active deadlines rather than a queue where leaks wait indefinitely.

1
eCFR. 40 CFR 60.482-9a Standards: Delay of Repair
2
eCFR. 40 CFR 63.171 Standards: Delay of Repair
3
eCFR. 40 CFR 63.1005 Leak Repair
4
eCFR. 40 CFR 60.482-7a Standards: Valves in Gas/Vapor Service and in Light Liquid Service
5
eCFR. 40 CFR 63.1259 Recordkeeping Requirements
6
eCFR. 40 CFR 60.487 Reporting Requirements
7
GovInfo. Federal Register Vol. 90, No. 5 Civil Penalty Inflation Adjustments