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Contact Information:
Placer County APCD
DeWitt Center
11464 "B" Ave.
Auburn, CA 95603-2603
(530) 889-7130
Or view the Department's
Website
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Placer County Air Pollution Control District-CALIFORNIA
DE MINIMIS EXEMPTIONS (Must Meet 1298):
Engines less than 50 hp or turbines less than 3 MMBtu/hr or any unit smaller than 1 MMBtu/hr and burning natural
gas or liquid petroleum gas are exempt from permitting.
MINOR SOURCE PERMITTING:
Units with a potential to emit 10 pounds per day of VOC or NOx, 550 pounds per day of CO or 80 pounds per day of
PM10 and SOx triggers BACT. The air district will basically follow CARB's recommended guidance. Sample BACT for control of NOx from turbines and internal
combustion engines is as follows:
| Size of Unit |
Level of Control (ppm) |
| >3 MW |
9 |
| 3-12 MW simple cycle |
2.5 |
| 3-12 MW combined cycle |
5 |
| 12-50 MW simple cycle |
2.5 |
| 12-50 MW combined cycle |
5 |
| IC Engines |
9 |
In addition, the district requires emission offsets which are triggered if a source has potential to emit greater
than 7,500 pounds per quarter of NOx, VOCs or PM.
The permitting process is supposed to be completed within 180 days, but sometimes may take longer.
TREATMENT OF EMERGENCY ENGINES:
Emergency engines must be permitted. The permit will include a limit of 100 hours for maintenance and testing,
but no hourly restriction on emergency use. These units may only operate during emergencies and no offsets are
required.
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