... PCC plant Lime kiln modifications (e.g., high-efficiency filters, higher efficiency refractory insulation brick) Lime kiln oxygen enrichment Lime kiln ESP Makeup Chemicals Practices to ensure ... content in the exhaust gas is a sign that there is insufficient air to complete fuel burning. Using a combination of CO and oxygen readings, it is possible to optimize the fuel/air mixture for high ... project-specific support in eight different U.S. regions, including project development and screening tools; technical assistance and training; information regarding issues related to permitting, utilities,...