Laguna Treatment Plant Annex Boilers 1 and 2 Replacement (C02330)

The Laguna Treatment Plant process heat system conveys heated water from the combined heat and power engines or plant boilers to the anaerobic digesters. Two gas-fired fire-tube boilers in the existing Annex boiler room provide backup process heat when heating demands are high or the combined heat and power engines are not operating. Both boilers have reached the end of their service lives and do not comply with current Bay Area Air Quality Management District requirements. One boiler has failed...