This is a Consent Agreement and Final Order between US EPA and Halliburton Energy Services, Inc (Respondent), headquartered in Houston, Texas, for violations of the California Truck and Bus rule by running diesel trucks without required controls to filter dangerous fine particulate matter (PM). Halliburton will spend $180,600 on environmental projects to reduce air pollution at schools in the Los Angeles-South Coast Air Basin, and $75,000 on air quality improvements in the San Joaquin Valley. The company will also pay a $154,400 civil penalty for the violations.