On the Road: Opacity Testing & Visual Inspections Across Northern California's Major Corridors
If you operate diesel vehicles in California, you're likely familiar with the strict emissions standards set by the California Air Resources Board (CARB). At NorCal CarB Mobile, we bring these essential compliance services directly to your location throughout major cities along I-5 and I-80, saving you valuable time and ensuring your fleet stays operational and compliant.
What is Opacity Testing?
Opacity testing measures the darkness or density of exhaust smoke coming from diesel vehicles. In simple terms, it determines how much light can pass through the exhaust emissions. Higher opacity readings indicate darker smoke, which typically means higher levels of particulate matter pollution—something CARB regulations aim to minimize.
Our mobile opacity testing equipment uses light-sensing technology to precisely measure this opacity percentage. California regulations typically require most diesel vehicles to maintain opacity levels below 5%, with some older vehicles allowed slightly higher thresholds.
What are Visual Inspections?
Visual inspections are complementary to opacity tests and involve a trained technician examining your vehicle's emission control systems to ensure all components are present, properly connected, and functioning as designed. During a visual inspection, we check for:
Tampering or modifications to emission control systems
Proper function of the Exhaust Gas Recirculation (EGR) system
Diesel Particulate Filter (DPF) condition
Proper labeling and engine certification
Evidence of excessive smoke or fluid leaks
Our Service Area: Major Cities Along I-5 and I-80
Our mobile testing units travel throughout Northern California's major transportation corridors, bringing compliance services directly to your location. Here's where you can find us:
Along Interstate 5:
Redding: Serving the northern reaches of the Sacramento Valley
Sacramento: The state capital and central hub for many fleet operations
Stockton: A critical logistics center with significant truck traffic
Tracy: Home to major distribution centers and transportation companies
Modesto: Serving agricultural and industrial fleet needs
Along Interstate 80:
Sacramento: Where I-5 and I-80 intersect, providing convenient access
Roseville: Supporting the growing commercial sector northeast of Sacramento
Auburn: Serving the foothills region
Rocklin: Home to numerous commercial and industrial operations
Davis: Supporting agricultural and university-related fleets
Vacaville: A convenient midpoint between Sacramento and the Bay Area
Fairfield: Serving Solano County's commercial vehicle needs
Vallejo: Providing testing services at the gateway to the Bay Area
Benefits of Mobile Testing
Instead of taking your vehicles off the road and driving them to a testing facility, our mobile service comes to you. This provides several advantages:
Minimized downtime for your vehicles and drivers
Testing on your schedule, including evenings and weekends
No lost productivity from vehicles being out of service
Immediate feedback and documentation
On-the-spot consultation about any compliance issues
Stay Compliant, Stay on the Road
California's diesel emissions regulations continue to evolve, with enforcement becoming increasingly stringent. Regular opacity testing and visual inspections aren't just about avoiding fines—they're essential for maintaining your operating authority and ensuring your vehicles aren't sidelined due to compliance issues.
Contact Us Today
Ready to schedule your opacity testing and visual inspections? We make it easy to reach us:
Phone:
Bay Area: (415) 900-8563
Sacramento Area: (916) 890-4277
Email:
Contact NorCal CarB Mobile today to schedule your testing at your location anywhere along the I-5 or I-80 corridors. Our certified technicians bring the testing facility to you, keeping your fleet compliant and your business moving forward.
