
- State-of-the-art cleaning technology for thorough results
- Experienced technicians trained in safety and compliance
- Flexible scheduling to minimize disruption to your operations
- Comprehensive fuel testing and analysis

Commerce City’s Fuel System Specialists
Here’s the thing about fuel storage tanks: they’re sort of like that closet you don’t open very often. Out of sight, out of mind, until something goes wrong. We’ve been cleaning and maintaining fuel storage systems across the Front Range for years, and honestly? The tanks that get neglected are the ones that cause the biggest headaches. In Commerce City’s industrial environment, with temperature swings and varying fuel quality, your storage tanks face constant challenges from condensation, sediment buildup, and biological contamination.
Our team understands what Commerce City operations deal with, from the refinery district to Dick’s Sporting Goods Park, from municipal facilities to agricultural operations near the South Platte River. We’ve seen tanks that looked fine on the outside but were brewing trouble inside. That’s why our approach combines thorough inspection, complete cleaning, and data-driven maintenance recommendations. We don’t just pump out your tank and call it done. We examine what’s happening inside, identify why contamination occurred, and help you prevent it from happening again.
Why Choose Us
Experience That Prevents Problems Instead of Just Fixing Them

We’ve cleaned fuel storage tanks across Commerce City’s industrial corridor and throughout the Front Range, from small on-site tanks to large bulk storage facilities. Our owner-operated approach means we’re personally invested in getting it right—because your operational continuity depends on fuel system reliability.
Here’s how Fleet Core’s fuel storage tank cleaning service helps energy reliant business like yours:
Comprehensive Contamination Removal
- Complete tank draining and vacuum extraction of sludge and sediment
- Removal of water accumulation that promotes microbial growth
- Interior surface cleaning to eliminate biofilm and bacterial colonies
Detailed System Assessment
- Pre-cleaning inspection to identify corrosion, leaks, and structural concerns
- Post-cleaning fuel quality testing and system evaluation
- Documented reporting for compliance and maintenance records
Preventative Maintenance Programs
- Customized cleaning schedules based on your fuel usage and storage conditions
- Ongoing monitoring to catch contamination issues early
- Winter preparation services to prevent gelling and wax formation
Transparent Service Delivery
- Upfront pricing with no hidden fees or surprise charges
- Flexible scheduling including emergency response for critical contamination
- Same team consistency, you work with people who know your systems
Our Service Offering
Fleet Core Preventive Maintenance Services
We take a comprehensive approach to tank maintenance, leaving no detail overlooked:

Fuel Tank Inspections & Diagnostics
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Fuel Tank Inspections & Diagnostics
Evaluate sediment levels, tank structure, and surface seals to detect risks early.
Advanced water-testing paste locates moisture contamination before it affects performance.

Water, Sludge & Sediment Removal
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Water, Sludge & Sediment Removal
Safely extract contaminants and prevent corrosion and microbial growth for clean, reliable fuel flow.

Fuel Stabilization, Restoration & Filtering
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Fuel Stabilization, Restoration & Filtering
Add stabilizers to maintain fuel usability in long-term storage, preventing oxidation and degradation.

Detailed Compliance Reporting
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Detailed Compliance Reporting
Receive full documentation confirming your tanks meet regulatory and environmental requirements.
Why Regular Maintenance Matters
The Risks of Neglect
Leaving tanks unchecked invites risks no operation can afford:
- Contaminated Fuel: water and sludge lead to clogged filters, microbial growth, and fuel inefficiency.
- Corrosion Hazards: tank rust weakens structural integrity and increases the risk of leaks.
- Regulatory Trouble: outdated or degraded tanks can fail inspections and incur financial penalties.
Fleet Core tackles these risks head-on, so you can focus on running your business — not worrying about your fuel system.


How Often Should Tanks Be Maintained?
Stay proactive with a schedule designed for your tank type:
- High-Use Tanks (Generators and Fleet Systems): maintenance annually ensures reliability during critical times.
- Long-Term Storage Tanks: every 2–3 years, depending on environmental conditions, prevents sediment buildup and fuel degradation.
Speak with Fleet Core to create a maintenance plan customized to your operations.
Trusted by Industry Leaders for Fuel and Lubrication Management
Fuel Delivery
On-Site Diesel and Gasoline When You Need It
Our mobile fuel delivery brings diesel, gasoline, and off-road fuel directly to your Commerce City location on your schedule. Whether you’re running backup generators at a data center or fueling construction equipment at a job site, we eliminate the downtime and logistics of off-site refueling with transparent pricing and reliable service.


Diesel Fuel Testing
Know What’s In Your Tank Before It Damages Equipment
Laboratory fuel testing identifies contamination levels, water content, and fuel degradation before they cause equipment failures. You know what? A simple fuel sample can reveal microbial growth, particulate levels, and chemical stability issues that visual inspection misses, giving you time to address problems instead of reacting to breakdowns.
Fuel Polishing
Restore Fuel Quality Without Replacement Costs
Fuel polishing removes water, sediment, and microbial contamination from stored fuel through filtration and separation processes. Instead of disposing of thousands of gallons of contaminated diesel, we restore it to specification-grade quality, saving you replacement costs while keeping your operations ready.


Eco-Friendly Oil & Fuel Spill Cleanup
Fast, Effective Petroleum Spill Response
Petro Buster petroleum cleaner tackles oil and fuel spills without harsh chemicals or complicated disposal requirements. This biodegradable solution breaks down petroleum residues quickly, making cleanup faster for equipment maintenance areas, fuel transfer zones, and accidental spills, keeping your facility compliant and your team safe.
Oil Analysis
Catch Engine Problems Before They Become Failures
Engine oil analysis detects wear metals, contamination, and oil degradation that signal developing mechanical issues. By monitoring oil samples from your fleet vehicles and mission-critical equipment, you identify problems like bearing wear, coolant leaks, or fuel dilution early, when repairs are manageable instead of catastrophic.

Who We Serve
Industries That Can’t Afford Fuel System Failures
From municipal snow plows that need to start at 3 AM during a storm to construction equipment running million-dollar projects, Commerce City operations depend on clean fuel. We serve the facilities, fleets, and operations where downtime isn’t just inconvenient, it’s expensive, dangerous, or both.

Facilities Management
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Facilities Management
Keep Power Online in Critical Moments
Backup generators cannot afford compromised fuel. Fleet Core ensures your emergency systems are always ready, protecting against failures during power outages or generator tests.

Environmental Compliance Management
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Environmental Compliance Management
Achieve Total Regulatory Compliance
Avoid costly penalties with tank cleaning services designed to meet eco-standards. Our process ensures environmentally responsible waste handling, giving you full confidence in your compliance.

Fleet Management
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Fleet Management
Protect Uptime for Fleets
Contaminated fuel leads to downtime and disrupted schedules. Fleet Core keeps your fuel systems clean, so your vehicles stay on the road and revenue stays steady.

Construction Site Management
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Construction Site Management
Prevent Project Delays
Dirty tanks damage equipment and derail timelines. Fleet Core ensures your heavy machinery operates reliably under demanding conditions.
Testimonials
Our Commitment To Excellence
Fleet Core is more than just a fuel and fluid provider — we are your comprehensive ENERGY PARTNER supporting operational reliability, productivity, and sustainability.
“Great company and great service!! Employees are well trained and very professional!!”
“Fleet Core offers excellent customer service. They complete the commitments they make and take care of their clients.”
“Great Diesel and Service. Extremely low temps and Core Power didn’t let me down. I would recommend Fleet Core and Core Power diesel to anyone in the Denver area.”
“Quick and efficient on-site fuel delivery.”