Short answer: decommissioning a Stage II vapor recovery system means replacing the vapor-capture hardware at every dispenser and closing off the vapor return path — not simply unbolting the old equipment. A compliant job swaps bellows nozzles for enhanced conventional nozzles that carry a current Executive Order number, replaces coaxial hoses with low-permeation hoses, caps every vapor return line at both the dispenser and the tank, adjusts the tank pressure/vacuum vent configuration, and finishes with notification where required and verification testing. Stations that treat it as a removal project create violations even in states that no longer require active Stage II.
Why stations decommission Stage II at all
Stage II was designed for a vehicle fleet without onboard vapor control. Modern cars carry on-board refueling vapor recovery — the ORVR systems that capture vapor inside the vehicle itself — so the dispenser-side hardware no longer adds much, and regulators in many jurisdictions have retired the requirement. The decision is usually driven by a rule change or a district letter, but the economics matter too: every boot, hose and swivel on a Stage II island is a wear part with a replacement schedule. Our overview of how Stage I and Stage II vapor recovery differ covers the background, and the monitoring regime that accelerated the transition is explained in our in-station diagnostics guide.
The replacement standard is the compliance standard
The single most common mistake is treating decommissioning as simple removal. Disconnecting the old equipment without installing compliant replacements creates a violation on its own — the standard that applies is the replacement standard, not the removal standard. Every dispenser that used to carry a bellows nozzle now needs an enhanced conventional nozzle; every coaxial hose needs a low-permeation replacement; every vapor return pipe at the dispenser and at the tank needs a proper cap. Improper capping is a fugitive emission source and one of the most common findings at post-decommissioning inspections.
The sequence, component by component
- Confirm which rules apply in your jurisdiction and whether notification to the air quality district is required before work starts;
- Replace each bellows nozzle with an enhanced conventional nozzle that carries a current Executive Order number — the number is the proof, not a sticker claim;
- Swap coaxial hoses for low-permeation hoses engineered to limit gasoline permeation through the hose wall — standard fuel hoses do not meet the specification;
- Cap every vapor return line at the dispenser and at the tank, using caps rated for the service;
- Revisit the tank pressure/vacuum vent valve settings, because removing the vapor return path changes the tank pressure dynamics;
- Schedule post-work verification testing and keep the records with the station file.
Order matters in one respect: do the dispenser-side work before the tank-side capping, so the system is never left in a half-converted state that vent vapor at the nozzle during a delivery cycle.
Nozzles, hoses and caps: what changes at the island
| Component | Stage II configuration | After decommissioning |
|---|---|---|
| Nozzle | Bellows nozzle with capture boot | Enhanced conventional nozzle with current EO number |
| Hose | Coaxial hose with vapor annulus | Low-permeation single-wall hose |
| Vapor return line | Runs dispenser to tank vapor space | Capped at dispenser and at tank |
| Breakaway and swivel | Vapor-tight swivel assemblies | Standard assemblies, vapor path removed |
| Tank vent | P/V valve tuned for return flow | Settings revisited for the new configuration |
The nozzle is where most of the cost sits, and it is also where inspectors look first. An enhanced conventional nozzle does the same job at the spout as any other conventional nozzle — what makes it compliant for this application is the documented emission performance behind its Executive Order number. Hoses are the second cost line: permeation through the hose wall is slow and invisible, which is exactly why the low-permeation specification exists. The piping side of the same island is covered in our sister site’s guide to sizing vapor return lines from dispenser to tank, which explains why those lines cannot simply be abandoned in place.
Tank side: vents and pressure dynamics
Removing the vapor return path changes how the tank breathes. During a delivery, gasoline displacing vapor used to have somewhere to go; with the return path capped, the pressure/vacuum vent valve becomes the only path. That makes vent settings and vent condition more important after decommissioning than before, not less. Check the valve for sticking and corrosion as part of the project, and confirm the settings match the new configuration — a vent that opens late turns every delivery into a pressure event at the hatch.
Notification, testing and records
Requirements vary by jurisdiction. Some states require formal notification to the air quality district before decommissioning begins; some require contractor involvement and post-decommissioning verification testing; others accept documentation that compliant replacement equipment was installed. What is universal is the paperwork: keep the nozzle Executive Order documentation, hose specifications, capping details, vent settings and any test results together. When an inspector asks what was done and when, a complete file ends the conversation in minutes.
Frequently asked questions
Can we just remove the Stage II equipment and leave the lines?
No. Abandoned vapor lines that are not properly capped are a fugitive emission source, and removal without compliant replacement is itself a violation in most jurisdictions that retired Stage II.
Do all dispensers need new nozzles at the same time?
Plan the island as one project. Mixed configurations on the same forecourt make records confusing and inspections harder, and the per-dispenser labor is cheaper when the contractor is already on site.
How do we know the work was done correctly?
Post-decommissioning verification testing where required, plus a file containing the nozzle Executive Order documentation, hose specifications, capping details and final vent settings. Verification is the evidence; the invoice is not.
Luoyang Wohong Petrochemical Equipment Co., Ltd. builds vapor recovery units and membrane separation skids for fuel stations, terminals and depots. Contact us for a recovery scheme matched to your vapor source and site layout.