AECOM Civil Construction specialty contractor SCCI Electric performed the J-111 Central Generation Emission Controls project, a retrofit of the digester gas engines at Plant No. 1 and Plant No. 2 to comply with South Coast Air Quality Management requirements.

The emissions control work included installing catalytic oxidizer/selective catalytic reduction systems and digester gas cleaning systems at Plant No. 1 and Plant No. 2; a steam convertor at Plant No. 2; HVAC system at Plant 2; replacement of the Plant No.1 and Plant No. 2 CenGen roofs; the addition of controls to the existing Plant No. 1 absorption chillers; refurbishment of Plant No. 2 intake fans; and piping modifications to the Plant No. 2 cooling water line.

The project was completed in 2016.