OCSD Central Generation Emissions Control

This project retrofitted the digester gas engines at Plant No. 1 and Plant No. 2. Emissions control work included the installation of catalytic oxidizer/selective catalytic reduction systems and digester gas cleaning systems at both plants. Additional scope included installing a steam converter and HVAC system at Plant No. 2; replacing the CenGen roofs at both Plant No. 1 and Plant No. 2; adding controls to the existing absorption chillers at Plant No. 1; refurbishing intake fans at Plant No. 2; and performing piping modifications to the Plant No. 2 cooling water line.

Shimmick self-performed the electrical, mechanical, civil, structural concrete, structural steel, insulation, and commissioning work. To minimize the impact on facility operations, Shimmick maintained the continuous operation of all eight engines throughout construction, ensuring uninterrupted power generation. Shimmick successfully implemented this aspect through complex sequencing and close coordination with the owner. Not only did the team complete the project on schedule, but they also ensured that the facility remained fully operational during construction.