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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchA marine facility should begin with a complete petroleum inventory, then test that inventory and the facility’s operating conditions against 40 CFR Part 112, applicable state and local rules, and site-specific drainage risks. For a marina, EPA says storing more than 1,320 gallons of aboveground petroleum generally triggers the need for an SPCC Plan; the marina worksheet totals the capacity of aboveground petroleum containers holding 55 gallons or more, not merely the fuel currently in them.
The plan is a working site document. It should show tanks, containers, piping, hoses, transfer points, drains, and routes to navigable water; explain containment and inspection practices; assign spill-response responsibilities; and remain available at the facility during normal operating hours. Secondary containment must be designed around the largest applicable container, precipitation exposure, transfer activities, and the way a release could move toward water.
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1. Determine whether the facility needs an SPCC Plan
Start with the federal screening question, but do not treat the marina webpage summary as a substitute for reviewing the actual rule and facility circumstances. EPA’s marina guidance says marinas storing more than 1,320 gallons of aboveground petroleum generally need an SPCC Plan. Its worksheet counts the capacity of aboveground petroleum containers of 55 gallons or more.
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Count container capacity, not current fill
A tank that is only partly full is still counted at its rated capacity for the worksheet. Include the capacity of each qualifying aboveground petroleum container, such as fixed fuel tanks, day tanks, portable tanks, drums, and other containers that meet the 55-gallon cutoff. Record petroleum products separately from non-petroleum materials, and document why any container is excluded.
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| Inventory item | Capacity to record | Why it matters |
|---|---|---|
| Aboveground petroleum tank | Rated or design capacity | Counts toward the aggregate screening total, even when partly full |
| Aboveground container holding 55 gallons or more | Full container capacity | EPA’s marina worksheet uses this size cutoff |
| Underground tank or piping | Record location, product, and capacity separately | Do not assume the simplified aboveground threshold resolves the entire facility’s applicability |
| Transfer hose, nozzle, or mobile refueler | Record equipment type and operating role | Classification can affect containment provisions and response planning |
If the aboveground total exceeds 1,320 gallons, treat the facility as potentially subject to SPCC requirements and proceed with a full applicability review. If the total is below that figure, do not conclude that no planning is needed: state and local environmental, fire-code, building, stormwater, and marine requirements may still apply, and an actual release can still reach navigable water.
Screen the entire facility, not just the fuel dock
Map fuel storage and transfer areas together with other petroleum containers, piping, loading areas, maintenance areas, generators, emergency-fuel tanks, and drainage. The federal threshold is only one part of the decision. Facility status, container configuration, operating practices, and the path to water all affect the work required.
2. Build a defensible inventory and site map
Use a field walk, drawings, tank records, and operator interviews to create one controlled inventory. Assign each container an identification number that appears on the plan, the site diagram, inspection forms, and maintenance records.
Information to capture for every container
- Identification number, location, product, and aboveground or underground status.
- Rated capacity and the capacity used in the applicability calculation.
- Tank or container construction, secondary-wall arrangement, supports, and visible corrosion or damage.
- Connected piping, valves, pumps, hoses, dispensers, and normal transfer routes.
- Nearby drains, outfalls, sumps, shorelines, bulkheads, ramps, and low points.
- Distance and flow direction to navigable water or adjoining shorelines.
- Inspection frequency, responsible person, last inspection, and open corrective actions.
What the site diagram should show
EPA identifies a site diagram as a plan element. Make the drawing useful to a responder who has never worked at the facility. Show property boundaries, docks, fuel dispensers, tanks, container numbers, transfer points, shutoff valves, drainage structures, stormwater flow arrows, spill-kit locations, access gates, muster points, and the route a release could take to water. Include north orientation, a legend, revision date, and emergency contact information.
Keep the diagram consistent with field conditions. A moved tank, abandoned drain, rerouted hose, or new loading point is a plan change, not a minor drafting issue.
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3. Select the correct plan-certification path
A marina operator may draft an SPCC Plan, but EPA says it generally must be certified by a Professional Engineer unless the facility meets the requirements for self-certification. Eligibility for self-certification depends on additional criteria; it is not automatic for every small marina or every facility below the 1,320-gallon screening figure.
When to involve a Professional Engineer
- The facility has complex tanks, shared containment, unusual drainage, or multiple transfer systems.
- Containment depends on grading, piping, pumps, valves, or engineered diversion.
- The site is exposed to flooding, storm surge, wave action, or difficult precipitation management.
- Construction changes could affect structural capacity, access, fire separation, or environmental permits.
- Operators cannot demonstrate that a self-certification route applies.
Ask the engineer to review inventory calculations, containment volume, structural and material suitability, drainage controls, transfer procedures, inspection schedules, and the site diagram. Keep the signed plan and supporting calculations at the facility.
4. Size secondary containment around the real release scenario
EPA summarizes the general requirement as using containment or diversionary structures and equipment to prevent discharges. For applicable bulk storage container installations, the rule generally calls for secondary containment for the full capacity of the largest single container, with sufficient freeboard for precipitation. The design must also address how fuel is transferred, because a release at a hose or dispenser may bypass a tank’s containment.
Calculate the controlling volume
- Identify the largest single applicable container in the containment area.
- Record its rated capacity, not its current fuel level.
- Determine whether other tanks, piping, pumps, or equipment drain into the same collection area.
- Account for precipitation that can enter the area before it is inspected and managed.
- Verify that the collection point, sump, valve, or diversion route can retain the design volume without sending oil to a drain or shoreline.
- Document assumptions, drawings, elevations, and operating controls in the plan.
For example, if a shared area contains a 1,000-gallon tank and a 500-gallon tank, the largest-container basis is 1,000 gallons, with additional capacity or operating controls for precipitation and any other inflow. That arithmetic is illustrative; the final design must reflect the actual grading, tank arrangement, rainfall exposure, and applicable code requirements.
Shared containment can be appropriate
Separate pans for every container are not invariably required. A bermed pad, engineered collection basin, double-walled arrangement, or shared drainage and collection system can serve multiple containers when it is designed and documented to prevent a discharge. Show how liquid from each tank reaches the collection point, how rainwater is managed, and how a blocked, closed, or failed drain affects capacity.
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Compare containment approaches
| Approach | Strengths | Design and maintenance questions |
|---|---|---|
| Fixed berm or curbed pad | Provides a visible collection boundary and can serve several tanks | Is the largest-container volume available after precipitation? Can vehicles, hoses, and workers cross the area without damaging the barrier? |
| Double-walled tank | Reduces reliance on an external berm for a tank-wall leak | Does it also capture valves, piping, pumps, and transfer spills? How is interstitial space monitored? |
| Shared drainage and collection system | Can organize several tanks or equipment areas into one controlled collection point | Are slopes, pipe capacity, shutoff valves, and inspection access documented? Could a blocked line cause overflow? |
| Portable or temporary containment | Useful for short-duration transfer, maintenance, or contingency work | Is it compatible with the fuel, stable on the surface, protected from weather and traffic, and large enough for the actual release scenario? |
Design for marine conditions
Containment materials and joints must remain compatible with the stored fuel and withstand ultraviolet exposure, salt air, temperature changes, traffic, and expected weather. Design safe access for readings, inspections, valve operation, cleaning, and emergency response. Do not create a trip hazard, block fire access, or force personnel to climb an unstable berm during a release.
Drainage management is part of containment. A drain that is normally open can defeat the system; a drain that is permanently closed can allow rainwater to consume capacity. Establish who may operate each valve, how the condition is verified, and where collected liquid goes for evaluation and disposal.
5. Capture spills at transfer points
Tank containment alone does not protect a fuel dock from a disconnected hose, overfilled boat tank, failed nozzle, leaking coupling, or vehicle impact. Treat loading and unloading as separate release scenarios.
Write a transfer procedure operators can follow
- Confirm the receiving tank, product, available capacity, hose condition, nozzle, bonding or grounding requirements, and communications method.
- Inspect the dock, transfer equipment, containment, drain covers, and spill supplies before starting.
- Position the vessel or vehicle, secure the hose, and keep the nozzle attended throughout transfer.
- Start at a controlled rate, watch the receiving tank and hose connections, and stop immediately for alarms, unusual pressure, visible leakage, or loss of communication.
- Close valves in the specified sequence, drain or cap the hose safely, and return equipment to its protected position.
- Inspect the transfer area after every operation and record leaks, near misses, damaged equipment, or corrective work.
Post the procedure where fueling occurs. Include an emergency stop location and a clear instruction to protect people first, stop the source when safe, prevent fuel from reaching water, notify the designated coordinator, and call outside responders when the event exceeds the facility’s capability.
6. Equip and organize spill response
EPA’s marina guidance gives a floating absorbent boom at the fuel dock as an example of equipment for a small surface spill. A boom is one component of a response system, not proof that a facility can handle every release.
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Separate water-surface and land response supplies
- Fuel-dock water equipment: floating absorbent boom, connectors, retrieval lines, and a protected storage location that remains accessible from the dock.
- Land-based absorbents: pads, socks, pillows, granular absorbent, overpack containers, and tools for leaks on pavement or inside a containment area.
- Drain protection: drain covers, plugs, or other devices selected for the facility’s drain types and kept near likely flow paths.
- Personal protective equipment: gloves, eye protection, protective clothing, and any additional equipment identified by the product’s hazard information.
- Source-control equipment: compatible plugs, caps, wrenches, valve keys, and emergency shutoff access.
- Waste-handling materials: labeled, closable containers and arrangements for evaluating, storing, and disposing of used absorbents and contaminated debris.
Select quantities and types from the facility’s response procedures, fuel products, dock layout, weather exposure, and credible release scenarios. Inspect supplies on a defined schedule, replace used or deteriorated items, and keep them out of locked rooms or vehicles that responders cannot reach quickly.
Document emergency actions
EPA’s marina guidance identifies health and safety, notifications, containment, and control as elements of emergency procedures. Your procedure should identify who makes the initial call, who stops the source, who protects drains and water, who manages the dock or evacuation, who contacts authorities, and who arranges cleanup and waste disposal.
Use an incident form to record date and time, product, estimated quantity, source, weather, location, actions taken, notifications, photographs, waste disposition, and corrective measures. The form supports follow-up even when a release is small.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.7. Establish inspections, testing, and records
An SPCC Plan describes inspections, and the plan is only useful if the written controls match what staff actually do. Build inspections around failure modes rather than relying on a generic walk-through.
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- Tank shells, seams, legs, supports, foundations, coatings, and signs of corrosion.
- Valves, flanges, pumps, meters, dispensers, hoses, swivels, nozzles, and emergency shutoffs.
- Berms, curbs, liners, sumps, collection points, drain valves, and precipitation accumulation.
- Dock edges, hose hangers, bollards, vehicle paths, and impact protection.
- Spill kits, boom packaging, drain covers, personal protective equipment, lighting, and access routes.
- Signs, labels, contact lists, site diagrams, and posted operating procedures.
Record the date, inspector, conditions, deficiencies, immediate controls, responsible owner, due date, and closure evidence. Escalate any condition that could allow fuel to reach water: active leakage, failed containment, blocked access, damaged hose, missing drain control, or a collection area already near capacity.
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Update the plan when the site changes
EPA says to keep the plan available at the marina during normal operating hours and update it when management or petroleum containers change. Treat new tanks, relocated dispensers, altered piping, changed drainage, new ownership, revised emergency contacts, and modified fueling practices as triggers for review. Retire superseded drawings so staff cannot accidentally use an obsolete response route.
8. Coordinate state, local, fire, and marine requirements
EPA explicitly cautions that state and local requirements may apply. Before construction or operation, identify the authorities having jurisdiction for environmental protection, fire safety, building and electrical work, stormwater, wastewater discharge, shoreline or floodplain controls, and any marine-transportation activity relevant to the facility.
Ask those authorities whether permits, registrations, separation distances, emergency plans, inspection records, product-specific controls, or reporting procedures apply. The federal SPCC baseline does not settle every location-specific fire code, state environmental rule, permit condition, engineering requirement, or Coast Guard obligation.
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9. Worked planning example
Consider a hypothetical marina with a 1,000-gallon aboveground gasoline tank, a 500-gallon aboveground diesel tank, two 55-gallon lubricant containers, a fuel dispenser, and a dock hose. The aboveground petroleum capacity counted for the marina worksheet is 1,610 gallons. Because that exceeds 1,320 gallons, the facility should proceed as potentially subject to SPCC and verify the precise rule applicability.
The largest tank is 1,000 gallons. If both tanks use one shared containment area, the design must generally provide the largest-container capacity plus sufficient precipitation freeboard, while also showing how the dispenser, hose, valves, and collection point are protected. A dock boom addresses a small surface spill scenario; it does not replace land absorbents, drain protection, source shutoff, notifications, or cleanup arrangements.
The plan diagram would identify both tanks, the dispenser, hose route, dock edge, storm drains, shoreline direction, shutoff valves, spill supplies, and access paths. Inspection forms would assign responsibility for tanks, containment, transfer equipment, and response supplies. Any change to the tank layout, management contacts, or drainage would trigger a plan review.
10. Common planning failures and corrections
| Failure | Why it fails | Correction |
|---|---|---|
| Counting only fuel currently in tanks | The marina worksheet uses container capacity | Inventory rated capacities for qualifying containers of 55 gallons or more |
| Designing a berm around the tank but not the dispenser | Transfer spills can bypass tank containment | Map transfer paths and provide capture or diversion at the dock and loading area |
| Using one small boom as the entire response plan | Water, pavement, drains, personnel safety, and waste handling need different controls | Stock water-surface equipment, land absorbents, drain protection, PPE, source-control tools, and waste containers |
| Leaving a containment drain unmanaged | An open drain can discharge fuel; a closed drain can consume capacity with rainwater | Assign valve control, inspection, precipitation management, and documentation responsibilities |
| Assuming a mobile refueler is exempt from all containment | EPA treats qualifying mobile refuelers specially for specified sized-containment provisions, but general containment still applies | Classify the equipment and transfer activity before applying the exception |
| Keeping the plan in an inaccessible office | Operators and responders cannot use it during normal operations | Keep the current plan available at the marina during normal operating hours |
| Ignoring local rules | Federal planning does not replace state, local, fire, permit, or marine requirements | Confirm requirements with each applicable authority before construction and operation |
11. Construction and commissioning checklist
- Verify every tank, container, pipe, hose, dispenser, drain, and transfer point against the field inventory.
- Confirm that containment capacity is based on the largest applicable container and includes precipitation management.
- Check that shared collection areas drain to a controlled point and cannot overflow toward water.
- Test emergency shutoffs, valves, alarms, communications, lighting, and access routes.
- Place spill supplies where operators can reach them without entering an unsafe area.
- Post transfer procedures and emergency contacts at the fuel dock.
- Complete the site diagram, inspection schedule, response roles, and waste-disposal arrangements.
- Obtain the required Professional Engineer certification or document an eligible self-certification path.
- Confirm state and local environmental, fire, building, stormwater, and marine requirements.
- Train operators before opening the facility and exercise the response procedure after commissioning and when conditions change.
EPA describes spill prevention as a team effort involving the marina, the fuel supplier, and the boater. Designing containment, procedures, and training so those three groups can act consistently is more reliable than treating the SPCC Plan as paperwork kept apart from daily fueling.
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