Facility Emissions
As part of the California Air Toxics "Hot Spots" Program, facilities are required to do public notification and risk assessment.
Here are some things to keep in mind to better understand what the
Emissions Inventory Reports represent.
1. The District is
responsible for preparing inventory reports for facilities subject to
the requirements. Emissions included in an inventory are from
stationary sources (emitting devices) that are typically required to
have District permits. However, stationary sources that are permit
exempt may also be included in the inventory. Stationary sources do
not include mobile or biogenic sources, or accidental releases.
2. Not all facilities are required to report annually. An
inventory may be prepared annually, biennially, or once every four
years depending on the applicable requirements specified by Rule 19.3, CARB’s Criteria and
Emissions Inventory Guideline Regulations and District
policies.
3. The District implements two Emissions
Inventory programs: the Criteria Pollutant Emissions Inventory and the
Toxic Emissions Inventory (Air Toxics “Hot Spots” Program).
Inventories with the header “Emissions Inventory Report” fulfill both
the Criteria Pollutant and Toxic Emissions Inventory requirements.
Inventories with the header “Criteria Emissions Inventory Report”
fulfill only the Criteria Pollutant Emissions Inventory requirements.
Though toxic emissions are presented in the Criteria Pollutant
Emissions Inventories, it should be understood the toxic emissions
presented may be incomplete and are not considered for the Toxic
Emissions Inventory.
4. To coincide with the implementation of CARB's Air Toxic Control Measure for Stationary Compression Ignition Engines, the District began including diesel particulate matter emissions in the inventories starting in 2005. Diesel particulate matter emissions are quantified for diesel engines only; and are not quantified for boilers, turbines or any other diesel combustion equipment. Prior to 2005, the emissions from diesel engines were reported as individual toxic pollutants that compose diesel exhaust. After 2005, individual toxic pollutants that compose diesel exhaust and diesel particulate matter emissions are both included in the facility emissions.
5. If the facility's report has an asterisk on the header (for
example, "2016 Emissions Inventory Report*"), the facility
emissions are based on an average material usage reported by other
facilities.