API PUBL 348 VOL 1-1998

The Western States Petroleum Association (WSPA) and American Petroleum Institute (NI) sponsored a program to develop air toxics emission factors for combustion devices using petroleum-based fuels from source test data collected under California Assembly Bill 2588 (AB2588), entitled the Air Toxics Hot Spots Information and Assessment Act of 1987.

The California Air Resources Board (CARB) provided WSPA and API with access to more than 161 petroleum industry combustion source reports, from which data were extracted to derive emission factors. The types of devices represented include process heaters, boilers, reciprocating internal combustion engines, gas turbines, steam generators, asphalt blowers, and coke calciners. The substances quantified include: trace metals; polychlorinated dibenzo[p]dioxins and dibenzofurans; polycyclic aromatic hydrocarbons and other semivolatile organic compounds; benzene, toluene and other volatile organic compounds; formaldehyde and other aldehydes; and hydrochloric acid.

Procedures developed in a separate CARB-sponsored program were used to screen and validate data, eliminating those data points or sets with significant problems and/or reporting deficiencies. Through this process, the best data sets were selected for emission factor development. Emission factors were developed encompassing all industries in California, and petroleum-industry-specific emission factors.

As a result of this study, air toxics emission factors for combustion devices have been developed using the best available source testing information. These emission factors can be used by environmental health and safety engineers to develop more accurate and complete emission inventories without additional source testing.

This report consists of three volumes:

• Volume 1 presents emission factors derived specifically for petroleum industry combustion devices.
• Volume 2, which presents emission factors derived for inclusion in the CARI3 database, and
• Volume 3, providing detailed results of data validation and statistical comparisons.