Code-compliant underground propane storage for commercial, agricultural & municipal sites
Bunney’s Inc. designs, installs, and maintains buried propane systems that stand up to Arizona heat and soil conditions. Our certified crews handle everything—from site assessment and permitting to excavation, tank setting, backfill, pressure testing, and startup—so your operation gets dependable fuel storage with minimal disruption.
New to Bunney’s? Learn who we are and explore our capabilities.
Why go underground?
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Better site use & aesthetics: Storage is out of sight and protected from impacts.
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Thermal stability: Subsurface temperatures help moderate tank pressure and reduce venting.
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Security & durability: Corrosion-resistant coatings, anodes, and engineered backfill extend service life.
What we deliver
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Right-sized tanks: Common capacities include 250, 500, and 1,000+ gallons for commercial, agricultural, and municipal use.
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Turnkey installation: Layout, trenching, regulators, risers, cathodic protection, and code-compliant setbacks.
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Maintenance programs: Annual inspections, cathodic protection checks, regulator replacement, leak testing, and documentation.
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Repair & replacement: Anode retrofit, coating rehabilitation, and end-of-life tank change-outs.
Our process
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Site walk & design: Verify loads, appliance demand, fill access, and code requirements (NFPA 58 + local AHJ).
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Excavation & base prep: Engineered bedding for drainage and tank support.
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Tank set & piping: Install anodes, dielectric fittings, regulators, and tracer wire; pressure test lines.
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Backfill & finish: Protective coatings, warning tape, and properly vented, traffic-rated lids where required.
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Commissioning: Purge, leak test, light appliances, and train staff on safe operation.
Arizona-specific considerations
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Hard, mineral-rich soils: We specify coatings and anode systems suited to local soil resistivity.
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Heat & UV: Grade-level components (domes, risers, regulators) use UV-resistant materials.
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Storm events: Backfill and drainage are designed to resist buoyancy and erosion during monsoon conditions.
Safety & compliance
Every install follows current code, manufacturer specs, and site-specific engineering. You’ll receive test records, cathodic protection readings, and a maintenance schedule to keep your system compliant and efficient.
Ready to plan your project? Get a site walk and a budgetary estimate from our environmental systems team.
Helpful links
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Plan the equipment pad with Concrete Flatwork
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Repair or restore existing containment with Concrete Repairs
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Route influent/effluent lines via Utility Trenches
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Keep systems tuned with Facility Maintenance
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Safely daylight and tie into existing utilities with Hydro Excavation
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Manage runoff at outfalls with Erosion Control
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Need storage, too? See Oil Storage Tanks
FAQs
What tank size do I need?
We size by total BTU load, simultaneous demand, delivery frequency, and growth plans. Most commercial sites use 500–1,000+ gallon tanks; agriculture often scales higher.
Do I need permits for a buried propane tank in Arizona?
Yes. Expect permits and inspections from the local Authority Having Jurisdiction (AHJ). We prepare drawings, set setbacks, and coordinate inspections.
How deep is the tank buried?
Depth is determined by code, frost/temperature considerations, and site loading. Covers remain accessible at grade; traffic areas may require traffic-rated lids and added cover.
How often is maintenance required?
Plan an annual inspection with leak checks, regulator service, and cathodic protection (anode) testing. High-use sites may benefit from mid-year checks.
Can a tank be installed near buildings or parking areas?
Yes—if code setbacks, ventilation, and protection from vehicle impact are met. We’ll place the tank for safe fill-truck access and future service.
Other tank services:
- Water Tanks: large water tanks, 10,000 gallon water tanks, 2,000 gallon water tanks, 2,500 gallon water tanks, underground water tanks, 500 gallon water tanks.
- Propane Tanks: large propane tanks, 250 gallon propane tanks, 500 gallon propane tanks, underground propane tanks
- Other Tanks: oil heating tanks, 500 gallon gas/fuel tanks, tanks for oil, crude oil tanks, oil water separator tanks
