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| Helpline - General Information | |
| Clean Air Vehicle Decal Application - DMV | (800) 777-0133 |
| Clean Vehicle Rebate Program | (866) 984-2532 |
| Diesel Truck and Bus Program | 8666diesel@arb.ca.gov |
| Drayage or Port Truck | drayage@arb.ca.gov |
| Transport Refrigeration Units (TRU/Reefers) | arber@arb.ca.gov |
| Diesel Off-Road On-line Registration System (DOORS) | doors@arb.ca.gov |
| Portable Equipment Registration | |
| Cap-and-Trade Program | (916) 322-2037 |
| Refrigerant Management Program | rmp@arb.ca.gov |
| Training Program | arbtrain@arb.ca.gov |
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| Air Pollution Complaints | (800) 952-5588 |
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