Estimation of HAP Emissions from Oil and Gas E&P Operation Wastes
Wastes generated from oil and gas Exploration and Production (E&P) operations contain chemicals that are considered as toxic air pollutants for the purpose of toxic release inventories (TRI) reports or hazardous air pollutants (HAP) under Title III of the 1990 Clean Air Act Amendments. A study was conducted to estimate HAP emissions from E&P waste management operations on a per-event basis. The per-event emission estimates were primarily calculated using U.S. Environmental Protection Agency’s guidance and the computer program CHEMDAT8. Various types of E&P wastes generated from different operations were used for per-event emission estimates based on typical waste disposal criteria and quantities. Sensitivity analyses were performed to illustrate the effects of different operational parameters on HAP emissions. Based on the per-event emission estimates, simplified procedures were developed to quantify emissions from individual waste disposal/treatment operation events. The simplified procedures can be applied to quantify toxic air pollutant emissions from E&P waste operations with very limited source information.