Established in 1967, PPC has completed over 500 successful air pollution & particulate control projects and with over 40 years of experience PPC has been a stable force in the field of electrostatic precipitation. With our manufacturing facilities in Longview Texas, PPC is here to provide all of your air pollution control system needs. PPC specializes in MACT compliant air pollution control using different methods. These methods include using biofilters and biofiltration for VOC control and wet and precipitator and dry electrostatic precipitator devices ( ESP ) for particulate.