Work shall include all civil, architectural, structural, mechanical, hvac, electrical and instrumentation work; package plant modifications; package plant blowers modifications; headworks and influent lift station modifications; new grit removal facility; aeration splitter box expansion; construction of two (2) additional chambers at the aeration splitter box is not included in the base bid and shall be performed only if alternate no. 2 is accepted by the owner. ; new aeration basins with 2 treatment trains; blower building modifications, including structural, architectural, hvac, mechanical, electrical and instrumentation. See attached file.