API PUBL 348 V 2:1997

Introduction A wide range of air toxics source test results have been generated since the California Air Toxics 'Hot Spots' Information and Assessment Act of 1987 (AB 2588) was initiated. The Western States Petroleum Association (WSPA) funded a project in the early 1990's to develop an emission factor database from WSPA funded tests. Emission factors resulting from this project are provided in the document titled 'Pooled Source Testing of Combustion Devices: Database Users Guidance Manual' which was released on January 13, 1994. The california Air Resources Board (CARB) recently funded a project to collect all AB2588 source test reports including petroleum and nonpetroleum sources. Over 800 tests were collected by CARB. CARB developed over 2000 emission factors from 200 of the collected tests. These emission factors are available in the report titled 'Development of Toxics Emission Factors from Source Test Data Collected under the Air Toxics Hot Spots Program' which was released on April 11, 1996. CARB did not develop emission factors for petroleum industry sources because they believe the petroleum industry has already developed and is continuing to develop emission factors. As the primary contractor for the CARB emission factor project, Energy and Environmental Research (EER) identified several tests collected by CARB which were not included in the WSPA emission factor database. Under joint funding from WSPA and the American Petroleum Institute (API), EER was contracted to update the existing WSPA database with the additional CARB test report. CARB agreed to provide WSPA and API access to the sources test reports provided the emission factors were developed using CARB procedures. In addition to providing access to the test data, CARB allowed WSPA to use its emission factor graphical user interface (GUI). The GUI permits users to sort, list, print, and export emission factors from personal computers. This project benefited the petroleum industry in the following ways: -- Districts, CARB, EPA, and the petroleum industry have the most representative and complete database available for petroleum industry combustion devices. -- All sources test results were reviewed using procedures developed by CARB. These procedures were developed to assess the quality of sources test results allowing emission factors of known quality to be developed. Using emission factors developed from CARB procedures and approved by CARB add credibility to the resulting emission inventories. -- All emission factors are available in an easy to use GUI. The GUI allows users to search for emission factors, generate reports, and export data for use in spreadsheets and other programs. Industry could not access the previous WSPA emission factor database by computer. This report describes the procedures used to validate and develop emission factors for petroleum industry combustion sources. The report also provides the results of the validation efforts and emission factor calculation procedures. It should be noted that the procedures were developed by CARB for the project discussed previously. Section 2 provides a brief description of the CARB data collection efforts. A description of the screening procedures applied by CARB are provied in Section 3 along with a list of priority sources for emission factor development. The validation procedures and results are described in Section 4. Data extraction procedures are described in Section 5. Emission factor calculation procedures and results are described in Section 6. Supporting documentation such as statistical analyses are provied in Volume 3. The GUI is described in a document titled the 'Database User's Manual'.