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Cancer Risk:
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The theoretical probability of contracting cancer when continually exposed for a lifetime
(70 years) to a given concentration of a substance. The probability is usually calculated as an upper confidence
limit. The maximum estimated risk may be presented as the number of chances in a million of contracting cancer. |
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CAS:
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Chemical Abstract Services (CAS) Registry Number is assigned to each pollutant. Do not use dashes when using a CAS
# to query the CEIDARS database. |
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CEIDARS:
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The California Emission Inventory Database and Reporting System (CEIDARS) contains
all of the emissions data for point sources at ARB. |
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CERR:
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CERR, the Consolidated Emission Reporting Rule, is a US/EPA requirement for certain classes of facilities. |
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CHAPIS:
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CHAPIS, the Community Health Air Pollution Information System, provides interactive maps of air pollution
emission sources over the web. |
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Database Year:
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Criteria Pollutant data are available for a variety of database years. Toxics inventory
data are available from 1996 to 2003 database years; however, toxic emissions may be derived from earlier emission
inventory years. The toxics data are submitted to the ARB by the local air districts as a requirement of the Air Toxics "Hot Spots" Program. This Program requires emission inventory updates every four years, although more frequent
updates may occur. |
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Facility ID:
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Facility ID is a number that identifies a particular facility. This number is assigned
to the facility by the local Air District responsible for this facility. |
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Facility Name:
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When you search for specific facilities, remember that names will often be abbreviated;
i.e. "Northern California Electric" facilities may appear both spelled out and abbreviated as both "N.C.E."
and "NCE", depending on how the information was submitted by the facility owner. |
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Facility Prioritization Score:
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Districts prioritize facilities in the "Hot Spots" program and assign a cancer,
chronic, and acute prioritization score based on those emissions. In addition to the quantity of emissions, the
district's evaluation considers other factors such as the toxicity of each substance emitted from the facility.
If the prioritization score is greater than the District threshold, the facility must conduct a health risk assessment. For more information see the CAPCOA Facility Prioritization
Guidelines, 1990. |
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Facility Standard Industrial Classification
(SIC) Code:
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This is a list of codes that represent various industrial classifications. This list
is maintained by the US Office of Management and Budget. For example, SIC Code 2512 is used for facilities that
make "Upholstered Household Furniture". One site that allows searches for particular SIC codes can be
found at the US Dept. of
Labor OSHA SIC Search. |
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Health Risk
Assessment (HRA):
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A comprehensive analysis of the dispersion of hazardous substances in the environment,
their potential for human exposure, and a quantitative assessment of both individual and population-wide health
risks associated with those levels exposed. For more information see the OEHHA Air Toxics "Hot Spots" Program Risk Assessment Guidelines (August 2003). |
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Non-Cancer
Acute
Hazard Index:
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The potential non-cancer health impacts resulting from a one-hour exposure to toxic
substances. The total hazard index includes the sum of hazard indices for pollutants with non-cancer health effects
that have the same or similar adverse health effects (endpoints). An acute hazard index is calculated by dividing
the one-hour concentration of a toxic pollutant by the acute reference exposure level for that pollutant. |
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Non-Cancer
Chronic Hazard Index:
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The potential non-cancer health impacts resulting from exposure to toxic substances
usually lasting from one year to a lifetime. The total hazard index includes the sum of hazard indices for pollutants
with non-cancer health effects that have the same or similar adverse health effects (endpoints). A chronic hazard
index is calculated by dividing the annual average concentration of a toxic pollutant by the chronic reference
exposure level for that pollutant. |
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Notification
Levels:
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The district established levels where the results of the health risk assessment required under the Hot Spots Program are
considered significant enough to notify the affected residents and businesses near a facility of the potential
health impacts from that facility's emissions. |
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Prioritization
Thresholds:
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These levels, established by each district, define a facility's requirements under the Hot Spots Program
based on the prioritization score calculation. Commonly, there are two thresholds, an upper and lower that may
be different for cancer and non-canceer prioritization evauations. Facilities with a score above the upper threshold
are high priority and must perform a health risk assessment. Facilities below the lower threshold are low priority.
Facilities that fall between the two thresholds are called intermediate priority and, at the district's discretion,
may be required to perform a risk assessment. |
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Program
Status:
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The current facility status in the "Hot Spots" Program (active, exempt, etc).
The district may need to be contacted for specific details concerning applicability to the program, exemption,
and the extent to which a facility has fulfilled emission inventory reporting and HRA requirements. Code: A - Priority Score > 10; B - 10<Risk<50; C
- 50<Risk<100; D - Risk > 100; E - Unprioritized; F
- 1<Risk<10; G - exempt or out of business. |
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Risk Reduction
Audit and Plan (RRAP) Levels:
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The district established levels where the results of the health risk assessment required under the "Hot Spots" Program are considered significant
enough to require the facility to prepare and implement measures to reduce its emissions and potential health risk. |
