OCCU-TEC, Inc.
For facilities that can’t afford to lose power, winter isn’t just a season – it's a stress test.
Subfreezing temperatures threaten fuel quality, damage infrastructure and increase the risk of generator failure, safety incidents and regulatory violations. That’s why winterizing critical fuel systems isn’t optional, it’s essential.
OCCU‑TEC helps facilities proactively prepare for cold weather through programmatic inspection, testing and compliance services. Our work spans industries such as healthcare, data centers, telecom, education and industrial operations – anywhere uninterrupted power is non-negotiable. With decades of expertise, we ensure your system is fully operational and compliant when winter arrives.
What Is a Critical Fuel System – and Why Winterization Matters
A critical fuel system supports emergency generator infrastructure in facilities that must remain operational, such as hospitals, telecom hubs and cloud data centers. These systems power life-saving medical devices, emergency communications and high-volume transaction systems that can’t afford even a minute of downtime.
Cold weather introduces serious risks:
- Diesel gelling reduces fuel flow and clogs filters.
- Condensation leads to water contamination and microbial growth.
- Frozen or brittle piping can crack and fail.
- Sensor and battery malfunctions compromise leak detection and automated monitoring.
- Poor fuel quality can cause generator failure under load.
Left unaddressed, these issues not only increase the risk of outage, but they can also trigger compliance violations and environmental hazards.
Common Winterization Gaps in Critical Fuel Systems
Through seasonal inspections and testing, OCCU‑TEC frequently identifies gaps that put fuel system compliance at risk during winter, including:
- No recent sample data providing fuel’s cold weather resistance metrics.
- Missing or non-functional tank or piping heaters and degraded insulation
- Untreated diesel fuel with low cold-flow performance
- Incomplete leak detection systems or expired certifications
- Obsolete day tank controls and pumping components
- Inaccurate or poorly calibrated sensors and alarms
- Missing documentation or inconsistent inspection logs
- Pour seasonal fuel type orders
Deferred maintenance, whether due to budget cuts, mergers or oversight, often leaves critical systems vulnerable when freezing temperatures hit.
Winterization Checklist: Inspection, Testing and Compliance
Preparing your fuel system for winter involves multiple coordinated steps. OCCU‑TEC’s team can support each one through a tailored, programmatic approach:
Representative fuel samples are collected and tested for cloud point, pour point, cold filter plug point, water content, microbial growth and contaminants. Treatment with anti-gel additives or filtration is recommended based on lab results.
2. Leak Detection & Tightness TestingElectronic fuel tank monitoring equipment is inspected and tested to insure proper calibration and function meeting EPA and PEI RP1200 requirements.
3. Ultrasonic & Corrosion-Protective Testing
Non-destructive ultrasonic testing assesses steel tank thickness and corrosion risk. Pit gauges, CP testing coordination and visual inspections support long-term system integrity.
4. Inspection of Tanks, Day Tanks and Sensors
Exterior aboveground and underground tanks and piping are inspected for insulation, heater element functionality and sensor performance. Controls and pumping systems tied to day tanks are also evaluated to ensure winter readiness.
5. Generator Load TestingCold-weather generator testing ensures functionality under load. OCCU‑TEC supports temporary fuel continuity during inspections, cleanings or upgrades.
Monthly, Annual and Triannual Compliance Services
Depending on tank type, OCCU‑TEC performs:
- Monthly inspections and leak testing log reviews
- Annual testing of sensors, ATG systems and inspection of onsite reporting and bookkeeping protocols
- Triannual testing of underground lines, spill buckets, and overfill equipment
All services are aligned with EPA/State UST regulations, PEI RP1200 and EPA SPCC plan requirements.
Integrated Support Through MESH Services
OCCU‑TEC’s MESH (Managed Environmental, Safety and Health) services support a comprehensive winter readiness strategy. MESH integrates environmental compliance, operational safety and regulatory oversight to minimize risk during seasonal transitions. 
For fuel system compliance, MESH provides:
- Hazard assessments and spill risk analysis
- Training on winter fuel handling and emergency procedures
- Protocol development for SPCC on ASTs and comprehensive UST compliance
- Safety program alignment with OSHA and EPA standards
- Documentation and audit readiness oversight
MESH turns seasonal preparedness into part of an ongoing EHS strategy, bridging safety and compliance through managed leadership and fractional support.
Why OCCU‑TEC Is the Right Partner for Winter Fuel System Readiness
With over 40 years of field experience, OCCU‑TEC brings unmatched depth in both fuel system mechanics and regulatory compliance. Our service model is built to adapt to your site, your team and your needs.
Through integrated fuel system compliance services and MESH-aligned safety support, OCCU‑TEC delivers a reliable winter readiness strategy designed for performance and peace of mind.
Now is the time to act. Schedule your winter inspection and fuel testing plan today. Connect with OCCU‑TEC.