Fugitive volatile organic compound (VOC) and hazardous air pollutant (HAP) emission from valves, pumps, and connectors ere investigated at two bulk gasoline storage terminals (A & B) in the Madison area. The purpose of the project was to determine whether or not the implementation of Leak Detection and Repair (LDAR) programs, as proposed in the NESHAP standard, will significantly reduce the total emissions from a facility. The valves, pumps, and connectors at both sites were screened with a portable VOC detector. WIth the screening results, estimated VOC emission rates wer calculated using three EPA approved methods; the Average Emission Factor Approach, Screenings Ranges Approach, and EPA Correlation Approach. In addition, fugitive samples were collected in order to determine the percent age of HAPs in the fugitive VOC emissions. The samples were collected on charcoal tubes, and analyzed by a gas chromatograph. The results indicate that the estimated fugitive VOC and HAP emissions comprise less than 2.6 percent and 0.1 percent , respectively, of the total emissions for Terminal A, and 3.8 percent and 0.6 percent , re-spectively, of the total emissions for Terminal B. Even though fugitive emissions are not a significant constituent of each facility's emissions, implementation of a quarterly LDAR program would decrease the amount of lost product and prevent unexpected down time without placing undue burden on each facility.
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