with the associated shutdowns to bypass the plant’s entire digester gas system during construction.
• Installing a 100-mgd primary effluent bypass system along with the associated shutdowns to remove and replace the existing system.
• New site work, including yard piping and civil improvements such as grading, flatwork, and paving. Due to the wastewater treatment plant’s age and period in which it was constructed, there were several hazardous materials present that the team had to mitigate and address during construction, including asbestos, lead paint, PCB caulking and lead. Troughout the project, safe access and work zone safety
was challenging due to the project’s location in the center of an operating wastewater treatment plant in which over 300 staff operated the facility around the clock, and while as many as 10 other projects were being constructed simultaneously. Walsh delivered an array of innovative solutions at every
juncture and focused heavily on providing ongoing employee training that went above and beyond typical jobsite training requirements for over 50 field employees. Addressing everything from Silica training, fall protection, scissor lift and boom lift training to hazardous material awareness, rigging and signaling and much more, training took place both in larger classroom group training sessions as well as one-on-one trainings on a
specific tool or hazard. Trough these efforts and others, Walsh completed this
project with a strong safety record, successfully delivering an important piece of infrastructure for this owner and the region it serves.
Thank You to the CSEA Awards Sponsors!
Platinum Safety Sponsors:
• HammerTech • Milwaukee Tool
Keynote Sponsor:
• Teichert Construction
Gold Safety Sponsors:
• Clark Construction • EHS International Inc. • Griffith Company
Silver Safety Sponsors:
• Fisher & Phillips LLP • Professional Contractor Supply
CALIFORNIA CONSTRUCTOR JANUARY/FEBRUARY 2024
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